subject:(Computational cost)

University of the Western Cape

1. Kazeem, Funmilayo Eniola. Multilevel Monte Carlo simulation in options pricing .

Degree: 2014, University of the Western Cape

► In Monte Carlo path simulations, which are used extensively in computational -finance, one is interested in the expected value of a quantity which is a… (more)

Subjects/Keywords: Monte Carlo simulation; Computational cost; Risk-neutral measure

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APA (6^th Edition):

Kazeem, F. E. (2014). Multilevel Monte Carlo simulation in options pricing . (Thesis). University of the Western Cape. Retrieved from http://hdl.handle.net/11394/4349

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kazeem, Funmilayo Eniola. “Multilevel Monte Carlo simulation in options pricing .” 2014. Thesis, University of the Western Cape. Accessed January 21, 2020. http://hdl.handle.net/11394/4349.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kazeem, Funmilayo Eniola. “Multilevel Monte Carlo simulation in options pricing .” 2014. Web. 21 Jan 2020.

Vancouver:

Kazeem FE. Multilevel Monte Carlo simulation in options pricing . [Internet] [Thesis]. University of the Western Cape; 2014. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/11394/4349.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kazeem FE. Multilevel Monte Carlo simulation in options pricing . [Thesis]. University of the Western Cape; 2014. Available from: http://hdl.handle.net/11394/4349

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto

2. Sundar, Sowndarya. Communication Augmented Scheduling for Cloud Computing with Delay Constraint and Task Dependency.

Degree: 2016, University of Toronto

URL: http://hdl.handle.net/1807/77620

►

Cloud computing can augment the capabilities of resource-poor mobile devices with the help of resourceful servers. It allows reduction of energy consumption and makespan by… (more)

Subjects/Keywords: Application Deadline; Cloud Computing; Computational Offloading; Cost Minimization; Dependency; Scheduling; 0464

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APA (6^th Edition):

Sundar, S. (2016). Communication Augmented Scheduling for Cloud Computing with Delay Constraint and Task Dependency. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/77620

Chicago Manual of Style (16^th Edition):

Sundar, Sowndarya. “Communication Augmented Scheduling for Cloud Computing with Delay Constraint and Task Dependency.” 2016. Masters Thesis, University of Toronto. Accessed January 21, 2020. http://hdl.handle.net/1807/77620.

MLA Handbook (7^th Edition):

Sundar, Sowndarya. “Communication Augmented Scheduling for Cloud Computing with Delay Constraint and Task Dependency.” 2016. Web. 21 Jan 2020.

Vancouver:

Sundar S. Communication Augmented Scheduling for Cloud Computing with Delay Constraint and Task Dependency. [Internet] [Masters thesis]. University of Toronto; 2016. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/1807/77620.

Council of Science Editors:

Sundar S. Communication Augmented Scheduling for Cloud Computing with Delay Constraint and Task Dependency. [Masters Thesis]. University of Toronto; 2016. Available from: http://hdl.handle.net/1807/77620

Virginia Tech

3. Kamal, Tariq. Computational Cost Analysis of Large-Scale Agent-Based Epidemic Simulations.

Degree: PhD, Computer Science, 2016, Virginia Tech

URL: http://hdl.handle.net/10919/82507

► Agent-based epidemic simulation (ABES) is a powerful and realistic approach for studying the impacts of disease dynamics and complex interventions on the spread of an… (more)

▼ Agent-based epidemic simulation (ABES) is a powerful and realistic approach for studying the impacts of disease dynamics and complex interventions on the spread of an infection in the population. Among many ABES systems, EpiSimdemics comes closest to the popular agent-based epidemic simulation systems developed by Eubank, Longini, Ferguson, and Parker. EpiSimdemics is a general framework that can model many reaction-diffusion processes besides the Susceptible-Exposed-Infectious-Recovered (SEIR) models. This model allows the study of complex systems as they interact, thus enabling researchers to model and observe the socio-technical trends and forces. Pandemic planning at the world level requires simulation of over 6 billion agents, where each agent has a unique set of demographics, daily activities, and behaviors. Moreover, the stochastic nature of epidemic models, the uncertainty in the initial conditions, and the variability of reactions require the computation of several replicates of a simulation for a meaningful study. Given the hard timelines to respond, running many replicates (15-25) of several configurations (10-100) (of these compute-heavy simulations) can only be possible on high-performance clusters (HPC). These agent-based epidemic simulations are irregular and show poor execution performance on high-performance clusters due to the evolutionary nature of their workload, large irregular communication and load imbalance. For increased utilization of HPC clusters, the simulation needs to be scalable. Many challenges arise when improving the performance of agent-based epidemic simulations on high-performance clusters. Firstly, large-scale graph-structured computation is central to the processing of these simulations, where the star-motif quality nodes (natural graphs) create large computational imbalances and communication hotspots. Secondly, the computation is performed by classes of tasks that are separated by global synchronization. The non-overlapping computations cause idle times, which introduce the load balancing and cost estimation challenges. Thirdly, the computation is overlapped with communication, which is difficult to measure using simple methods, thus making the cost estimation very challenging. Finally, the simulations are iterative and the workload (computation and communication) may change through iterations, as a result introducing load imbalances. This dissertation focuses on developing a cost estimation model and load balancing schemes to increase the runtime efficiency of agent-based epidemic simulations on high-performance clusters. While developing the cost model and load balancing schemes, we perform the static and dynamic load analysis of such simulations. We also statically quantified the computational and communication workloads in EpiSimdemics. We designed, developed and evaluated a cost model for estimating the execution cost of large-scale parallel agent-based epidemic simulations (and more generally for all constrained producer-consumer parallel algorithms). This cost model… Advisors/Committee Members: Butt, Ali Raza Ashraf (committeechair), Marathe, Madhav Vishnu (committee member), Bisset, Keith R. (committee member), Vullikanti, Anil Kumar S. (committee member), Schulz, Martin (committee member).

Subjects/Keywords: Cost Analysis and Estimation; Parallel Algorithms; Graph Partitioning; Computational Epidemiology; Disease Dynamics; Statistical Analysis

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APA (6^th Edition):

Kamal, T. (2016). Computational Cost Analysis of Large-Scale Agent-Based Epidemic Simulations. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/82507

Chicago Manual of Style (16^th Edition):

Kamal, Tariq. “Computational Cost Analysis of Large-Scale Agent-Based Epidemic Simulations.” 2016. Doctoral Dissertation, Virginia Tech. Accessed January 21, 2020. http://hdl.handle.net/10919/82507.

MLA Handbook (7^th Edition):

Kamal, Tariq. “Computational Cost Analysis of Large-Scale Agent-Based Epidemic Simulations.” 2016. Web. 21 Jan 2020.

Vancouver:

Kamal T. Computational Cost Analysis of Large-Scale Agent-Based Epidemic Simulations. [Internet] [Doctoral dissertation]. Virginia Tech; 2016. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/10919/82507.

Council of Science Editors:

Kamal T. Computational Cost Analysis of Large-Scale Agent-Based Epidemic Simulations. [Doctoral Dissertation]. Virginia Tech; 2016. Available from: http://hdl.handle.net/10919/82507

Australian National University

4. Kamal, Tahseen. Compact microscopy systems with non-conventional optical techniques .

Degree: 2018, Australian National University

URL: http://hdl.handle.net/1885/148711

► This work has been motivated by global efforts to decentralize high performance imaging systems through frugal engineering and expansion of 3D fabrication technologies. Typically, high… (more)

▼ This work has been motivated by global efforts to decentralize high performance imaging systems through frugal engineering and expansion of 3D fabrication technologies. Typically, high resolution imaging systems are confined in clinical or laboratory environment due to the limited means of producing optical lenses on the demand. The use of lenses is an essential mean to achieve high resolution imaging, but conventional optical lenses are made using either polished glass or molded plastics. Both are suited for highly skilled craftsmen or factory level production. In the first part of this work, alternative low-cost lens-making process for generating high quality optical lenses with minimal operator training have been discussed. We evoked the use of liquid droplets to make lenses. This unconventional method relies on interfacial forces to generate curved droplets that if solidified can become convex-shaped lenses. To achieve this, we studied the droplet behaviour (Rayleigh-Plateau phenomenon) before creating a set of 3D printed tools to generate droplets. We measured and characterized the fabrication techniques to ensure reliability in lens fabrication on- demand at high throughput. Compact imaging requires a compact optical system and computing unit. So, in the next part of this work, we engineered a deconstructed microscope system for field-portable imaging. Still a core limitation of all optical lenses is the physical size of lens aperture – which limits their resolution performance, and optical aberrations – that limit their imaging quality performance. In the next part of this work, we investigated use of computational optics-based optimization approaches to conduct in situ characterization of aberrations that can be digitally removed. The computational approach we have used in this work is known as Fourier Ptychography (FP). It is an emerging computational microscopic technique that combines the use of synthetic aperture and iterative optimization algorithms, offering increased resolution, at full field-of-view (FOV) and aberration-removal. In using FP techniques, we have shown measurements of optical distortions from different lenses made from droplets only. We also, investigated the limitations of FP in aberration recovery on moldless lenses. In conclusion, this work presents new opportunities to engineer high resolution imaging system using modern 3D printing approaches. Our successful demonstration of FP techniques on moldless lenses will usher new additional applications in digital pathology or low-cost mobile health.

Subjects/Keywords: droplet lens; lenses; manufacturing; mobile health; computational; compact,; portable; low-cost; 3D printed; passive droplet

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APA (6^th Edition):

Kamal, T. (2018). Compact microscopy systems with non-conventional optical techniques . (Thesis). Australian National University. Retrieved from http://hdl.handle.net/1885/148711

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kamal, Tahseen. “Compact microscopy systems with non-conventional optical techniques .” 2018. Thesis, Australian National University. Accessed January 21, 2020. http://hdl.handle.net/1885/148711.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kamal, Tahseen. “Compact microscopy systems with non-conventional optical techniques .” 2018. Web. 21 Jan 2020.

Vancouver:

Kamal T. Compact microscopy systems with non-conventional optical techniques . [Internet] [Thesis]. Australian National University; 2018. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/1885/148711.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kamal T. Compact microscopy systems with non-conventional optical techniques . [Thesis]. Australian National University; 2018. Available from: http://hdl.handle.net/1885/148711

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Michigan

5. Kulesza, Joel. Cost-optimized Automated Variance Reduction for Highly Angle-dependent Radiation Transport Analyses.

Degree: PhD, Nuclear Engineering & Radiological Sciences, 2018, University of Michigan

URL: http://hdl.handle.net/2027.42/147541

► Monte Carlo variance-reduction techniques that directly bias particle direction have historically received limited attention despite being useful for many radiation transport applications such as those… (more)

▼ Monte Carlo variance-reduction techniques that directly bias particle direction have historically received limited attention despite being useful for many radiation transport applications such as those in which radiation travels through large regions with a low probability of colliding. One such technique is known as DXTRAN (short for deterministic transport) in the MCNP Monte Carlo radiation transport code. Until now, effectively applying DXTRAN in calculations is largely based on empirical observations of computational performance. Optimal DXTRAN parameters are identified through manual iteration. This work develops new mathematical descriptions of the DXTRAN variance-reduction process and demonstrates a new automated variance-reduction method that applies these mathematical formulations to determine the optimal application of DXTRAN in a given problem. Specifically, this work includes the first known deduction and application of the integral transport kernels for both biasing with DXTRAN particle production and the associated free-flight transport with truncation of the initiating particle. This work applies these new DXTRAN transport kernels to derive expressions for the mean tally response in Monte Carlo transport calculations involving DXTRAN. These expressions are then used to rigorously prove, for the first time, that the technique is unbiased. This work also derives equations for the variance and associated computational cost of Monte Carlo calculations involving DXTRAN, which are solved using the deterministic discrete ordinates method. To verify the derivations developed in this work, fourteen 1-D and seven 2-D test case calculations are made. Within the 2-D test cases, a variety of scenarios are examined that lead to highly angle dependent solutions where other variance-reduction techniques that do not directly bias particle direction are challenged. For the 1-D cases, when DXTRAN is solely used, the Monte Carlo and deterministically calculated mean and variances agree within 1.4%. For the 2-D cases, the agreement is generally well within 10% and never worse than 13%, which is consistent with prior analyses for other variance-reduction techniques. Of the verification test cases, six 1-D and six 2-D test cases are processed using an automated optimization workflow to determine optimal DXTRAN variance reduction parameters. As long as a non-trivial change in FOM is predicted by the optimizer, the optimizer identifies improved DXTRAN parameters relative to the initial guess in all but one case. For the 2-D test cases, a coarse angular quadrature is used to permit the optimization iterations to run quickly; however, the relative change in computational cost as a result of varying DXTRAN size, position, and rouletting parameters is adequately captured. This work provides a method that could augment a strictly variance-reducing hybrid radiation transport method (e.g., FW-CADIS) to improve the efficiency of highly angle-dependent radiation transport analyses. Advisors/Committee Members: Kiedrowski, Brian (committee member), Solomon Jr., Clell J. (committee member), Ziff, Robert M (committee member), Larsen, Edward W (committee member), Martin, William R (committee member).

Subjects/Keywords: Computational-cost Optimizing Hybrid Radiation Transport Methods; Nuclear Engineering and Radiological Sciences; Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kulesza, J. (2018). Cost-optimized Automated Variance Reduction for Highly Angle-dependent Radiation Transport Analyses. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/147541

Chicago Manual of Style (16^th Edition):

Kulesza, Joel. “Cost-optimized Automated Variance Reduction for Highly Angle-dependent Radiation Transport Analyses.” 2018. Doctoral Dissertation, University of Michigan. Accessed January 21, 2020. http://hdl.handle.net/2027.42/147541.

MLA Handbook (7^th Edition):

Kulesza, Joel. “Cost-optimized Automated Variance Reduction for Highly Angle-dependent Radiation Transport Analyses.” 2018. Web. 21 Jan 2020.

Vancouver:

Kulesza J. Cost-optimized Automated Variance Reduction for Highly Angle-dependent Radiation Transport Analyses. [Internet] [Doctoral dissertation]. University of Michigan; 2018. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/2027.42/147541.

Council of Science Editors:

Kulesza J. Cost-optimized Automated Variance Reduction for Highly Angle-dependent Radiation Transport Analyses. [Doctoral Dissertation]. University of Michigan; 2018. Available from: http://hdl.handle.net/2027.42/147541

University of Florida

6. Zhao, Songlin. From Fixed to Adaptive Budget Robust Kernel Adaptive Filtering.

Degree: PhD, Electrical and Computer Engineering, 2012, University of Florida

URL: http://ufdc.ufl.edu/UFE0044951

► Recently, owning to universal modeling capacity, convexity in performance surface and modest computational complexity, kernel adaptive filters have attracted more and more attention. Even though… (more)

▼ Recently, owning to universal modeling capacity, convexity in performance surface and modest computational complexity, kernel adaptive filters have attracted more and more attention. Even though these methods achieve powerful classification and regression performance in complicated nonlinear problems, they have drawbacks. This work focuses on how to improve kernel adaptive filters performance both on accuracy and computational complexity. After reviewing some existing adaptive filters cost functions, we introduce an information theoretic objective function, Maximal Correntropy Criterion (MCC), that contains high order statistical information. Here we propose to adopt this objective function for kernel adaptive filters to improve system accuracy performance in nonlinear and non-Gaussian scenario. To determine the free parameter, kernel width in correntropy, an adaptive method based on the statistical property of the prediction error is proposed. After that we propose a growing and pruning method to realize a fixed-budget kernel least mean square (KLMS) algorithm based on improvements of the quantized kernel least mean square algorithm and a new significance measure. The end result is to control the computational complexity and memory requirement of kernel adaptive filters while preserving the accuracy as much as possible. This balance between accuracy and filter model order is explored from the perspective of information learning. Indeed the issue is how to deal with the trade-off between system complexity and accuracy performance, and an information learning criterion called Minimal Description Length (MDL) is introduced to kernel adaptive filtering. Two formulations of MDL: batch and online model are developed and illustrated by approximation level selection in KRLS-ALD and center dictionary selection in KLMS respectively. The end result is a methodology that controls the kernel adaptive filter dictionary (model order) according to the complexity of the true system and the input signal for online learning even in nonstationary environments. ( en ) Advisors/Committee Members: Principe, Jose C (committee chair), Rangarajan, Anand (committee member), Shea, John M (committee member), Chen, Yunmei (committee member).

Subjects/Keywords: Adaptive filters; Approximation; Computational complexity; Cost functions; Input data; Neural networks; Pruning; Signal processing; Simulations; Time series; kenrel – songlin

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APA (6^th Edition):

Zhao, S. (2012). From Fixed to Adaptive Budget Robust Kernel Adaptive Filtering. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0044951

Chicago Manual of Style (16^th Edition):

Zhao, Songlin. “From Fixed to Adaptive Budget Robust Kernel Adaptive Filtering.” 2012. Doctoral Dissertation, University of Florida. Accessed January 21, 2020. http://ufdc.ufl.edu/UFE0044951.

MLA Handbook (7^th Edition):

Zhao, Songlin. “From Fixed to Adaptive Budget Robust Kernel Adaptive Filtering.” 2012. Web. 21 Jan 2020.

Vancouver:

Zhao S. From Fixed to Adaptive Budget Robust Kernel Adaptive Filtering. [Internet] [Doctoral dissertation]. University of Florida; 2012. [cited 2020 Jan 21]. Available from: http://ufdc.ufl.edu/UFE0044951.

Council of Science Editors:

Zhao S. From Fixed to Adaptive Budget Robust Kernel Adaptive Filtering. [Doctoral Dissertation]. University of Florida; 2012. Available from: http://ufdc.ufl.edu/UFE0044951

7. Ravindran, Rajeswaran Chockalingapuram. Scheduling Heuristics for Maximizing the Output Quality of Iris Task Graphs in Multiprocessor Environment with Time and Energy Bounds.

Degree: MS, Electrical & Computer Engineering, 2012, University of Massachusetts

URL: https://scholarworks.umass.edu/theses/826

► Embedded real time applications are often subject to time and energy constraints. Real time applications are usually characterized by logically separable set of tasks… (more)

▼ Embedded real time applications are often subject to time and energy constraints. Real time applications are usually characterized by logically separable set of tasks with precedence constraints. The computational effort behind each of the task in the system is responsible for a physical functionality of the embedded system. In this work we mainly define theoretical models for relating the quality of the physical func- tionality to the computational load of the tasks and develop optimization problems to maximize the quality of the system subject to various constraints like time and energy. Specifically, the novelties in this work are three fold. This work deals with maximizing the final output quality of a set of precedence constrained tasks whose quality can be expressed with appropriate cost functions. We have developed heuristic scheduling algorithms for maximizing the quality of final output of embedded applications. This work also dealswith the fact that the quality of output of a task in the system has noticeable effect on quality of output of the other dependent tasks in the system. Finally run time characteristics of the tasks are also modeled by simulating a distribution of run times for the tasks, which provides for averaged quality of output for the system rather than un-sampled quality based on arbitrary run times. Many real-time tasks fall into the IRIS (Increased Reward with Increased Service) category. Such tasks can be prematurely terminated at the cost of poorer quality output. In this work, we study the scheduling of IRIS tasks on multiprocessors. IRIS tasks may be dependent, with one task feeding other tasks in a Task Precedence Graph (TPG). Task output quality depends on the quality of the input data as well as on the execution time that is allowed. We study the allocation/scheduling of IRIS TPGs on multiprocessors to maximize output quality. The heuristics developed can effectively reclaim resources when tasks finish earlier than their estimated worst-case execution time. Dynamic voltage scaling is used to manage energy consumption and keep it within specified bounds. Advisors/Committee Members: C Mani Krishna, Israel Koren.

Subjects/Keywords: precedence constraints; computational load; cost functions; reward; service; dynamic voltage scaling; Other Computer Engineering; Other Electrical and Computer Engineering

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APA (6^th Edition):

Ravindran, R. C. (2012). Scheduling Heuristics for Maximizing the Output Quality of Iris Task Graphs in Multiprocessor Environment with Time and Energy Bounds. (Masters Thesis). University of Massachusetts. Retrieved from https://scholarworks.umass.edu/theses/826

Chicago Manual of Style (16^th Edition):

Ravindran, Rajeswaran Chockalingapuram. “Scheduling Heuristics for Maximizing the Output Quality of Iris Task Graphs in Multiprocessor Environment with Time and Energy Bounds.” 2012. Masters Thesis, University of Massachusetts. Accessed January 21, 2020. https://scholarworks.umass.edu/theses/826.

MLA Handbook (7^th Edition):

Ravindran, Rajeswaran Chockalingapuram. “Scheduling Heuristics for Maximizing the Output Quality of Iris Task Graphs in Multiprocessor Environment with Time and Energy Bounds.” 2012. Web. 21 Jan 2020.

Vancouver:

Ravindran RC. Scheduling Heuristics for Maximizing the Output Quality of Iris Task Graphs in Multiprocessor Environment with Time and Energy Bounds. [Internet] [Masters thesis]. University of Massachusetts; 2012. [cited 2020 Jan 21]. Available from: https://scholarworks.umass.edu/theses/826.

Council of Science Editors:

Ravindran RC. Scheduling Heuristics for Maximizing the Output Quality of Iris Task Graphs in Multiprocessor Environment with Time and Energy Bounds. [Masters Thesis]. University of Massachusetts; 2012. Available from: https://scholarworks.umass.edu/theses/826

8. Allesson, Sara. Sheet Metal Forming Simulations with Elastic Dies: Emphasis on Computational Cost.

Degree: 2019, , Department of Mechanical Engineering

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18236

►

The car industry produces many of their car parts by using sheet metal forming, where one of the most time-consuming phases is the development… (more)

▼

The car industry produces many of their car parts by using sheet metal forming, where one of the most time-consuming phases is the development and manufacturing of new forming tools. As of today, when a new tool is to be evaluated in terms of usability, a forming simulation is conducted to predict possible failures before manufacturing. The assumption is then that the tools are rigid, and the only deformable part is the sheet metal itself. This is however not the case, since the tools also deform during the forming process. A previous research, which is the basis of this thesis, included a model with only elastic tools and showed results of high accuracy in comparison to using a rigid setup. However, this simulation is not optimal to implement for a daily based usage, since it requires high computational power and has a long simulation time. The aim and scope for this thesis is to evaluate how a sheet metal forming simulation with elastic tool consideration can be reduced in terms of computational cost, by using the software LS-DYNA. A small deviation of the forming result is acceptable and the aim is to run the simulation with a 50-75 % reduction of time on fewer cores than the approximate 14 hours and 800 CPUs that the simulation requires today. The first step was to alter the geometry of the tools and evaluate the impact on the deformations of the blank. The elastic solid parts that only has small deformations are deleted and replaced by rigid surfaces, making the model partly elastic. Later, different decomposition methods are studied to determine what kind that makes the simulation run faster. At last, a scaling analysis is conducted to determine the range of computational power that is to be used to run the simulations as efficient as possible, and what part of the simulation that is affecting the simulation time the most. The correlation of major strain deviation between a fully elastic model and a partly elastic model showed results of high accuracy, as well as comparison with production measurements of a formed blank. The computational time is reduced by over 90 % when using approximately 65 % of the initial computational power. If the simulations are run with even less number of cores, 10 % of the initial number of CPUs, the simulation time is reduced by over 70 %. The conclusion of this work is that it is possible to run a partly elastic sheet metal forming simulation much more efficient than using a fully elastic model, without reliability problems of the forming results. This by reducing the number of elements, evaluate the decomposition method and by conducting a scaling analysis to evaluate the efficiency of computational power.

Bilindustrin producerar många av sina bildelar genom att tillämpa plåtformning, där en av de mest tidskrävande faserna är utveckling och tillverkning av nya formningsverktyg. Idag, när ett nytt verktyg ska utvärderas med avseende på användbarhet, genomförs en formningssimulering för att förutsäga eventuella fel innan tillverkning.…

Subjects/Keywords: Elastic Sheet Metal Forming Simulation; Computational Cost; Decomposition; LS-DYNA; Elastisk plåtformningssimulering; beräkningskostnad; dekomposition; LS-DYNA; Other Mechanical Engineering; Annan maskinteknik

10 more images…

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APA (6^th Edition):

Allesson, S. (2019). Sheet Metal Forming Simulations with Elastic Dies: Emphasis on Computational Cost. (Thesis). , Department of Mechanical Engineering. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18236

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Allesson, Sara. “Sheet Metal Forming Simulations with Elastic Dies: Emphasis on Computational Cost.” 2019. Thesis, , Department of Mechanical Engineering. Accessed January 21, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18236.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Allesson, Sara. “Sheet Metal Forming Simulations with Elastic Dies: Emphasis on Computational Cost.” 2019. Web. 21 Jan 2020.

Vancouver:

Allesson S. Sheet Metal Forming Simulations with Elastic Dies: Emphasis on Computational Cost. [Internet] [Thesis]. , Department of Mechanical Engineering; 2019. [cited 2020 Jan 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18236.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Allesson S. Sheet Metal Forming Simulations with Elastic Dies: Emphasis on Computational Cost. [Thesis]. , Department of Mechanical Engineering; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18236

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

9. Vieira, Hiparco Lins. Redução do custo computacional do algoritmo RRT através de otimização por eliminação.

Degree: Mestrado, Sistemas Dinâmicos, 2014, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/18/18153/tde-05092014-163621/ ;

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A aplicação de técnicas baseadas em amostragem em algoritmos que envolvem o planejamento de trajetórias de robôs tem se tornado cada vez mais difundida. Deste… (more)

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A aplicação de técnicas baseadas em amostragem em algoritmos que envolvem o planejamento de trajetórias de robôs tem se tornado cada vez mais difundida. Deste grupo, um dos algoritmos mais utilizados é chamado Rapidly-exploring Random Tree (RRT), que se baseia na amostragem incremental para calcular de forma eficiente os planos de trajetória do robô evitando colisões com obstáculos. Vários esforços tem sido realizados a fim de reduzir o custo computacional do algoritmo RRT, visando aplicações que necessitem de respostas mais rápidas do algoritmo, como, por exemplo, em ambientes dinâmicos. Um dos dilemas relacionados ao RRT está na etapa de geração de primitivas de movimento. Se várias primitivas são geradas, permitindo o robô executar vários movimentos básicos diferentes, um grande custo computacional é gasto. Por outro lado, quando poucas primitivas são geradas e, consequentemente, poucos movimentos básicos são permitidos, o robô pode não ser capaz de encontrar uma solução para o problema, mesmo que esta exista. Motivados por este problema, um método de geração de primitivas de movimento foi proposto. Tal método é comparado com os métodos tradicional e aleatório de geração de primitivas, considerando não apenas o custo computacional de cada um, mas também a qualidade da solução obtida. O método proposto é aplicado ao algoritmo RRT, que depois é aplicado em um caso de estudo em um ambiente dinâmico. No estudo de caso, o algoritmo RRT otimizado é avaliado em termos de seus custos computacionais durante planejamentos e replanejamento de trajetória. As simulações são realizadas em dois simuladores: um desenvolvido em linguagem Python e outro em Matlab.

The application of sample-based techniques in path-planning algorithms has become year-by-year more widespread. In this group, one of the most widely used algorithms is the Rapidly-exploring Random Tree (RRT), which is based on an incremental sampling of configurations to efficiently compute the robot\'s path while avoiding obstacles. Many efforts have been made to reduce RRT computational costs, targeting, in particular, applications in which quick responses are required, e.g., in dynamic environments. One of the dilemmas posed by the RRT arises from its motion primitives generation. If many primitives are generated to enable the robot to perform a broad range of basic movements, a signicant computational cost is required. On the other hand, when only a few primitives are generated, thus, enabling a limited number of basic movements, the robot may be unable to find a solution to the problem, even if one exists. To address this quandary, an optimized method for primitive generation is proposed. This method is compared with the traditional and random primitive generation methods, considering not only computational cost, but also the quality of local and global solutions that may be attained. The optimized method is applied to the RRT algorithm, which is then used in a case study in dynamic environments. In the study, the modied RRT is evaluated in terms of the…

Advisors/Committee Members: Grassi Júnior, Valdir.

Subjects/Keywords: Ambientes dinâmicos; Computational cost; Custo computacional; Dynamic environments; Motion primitives; Optimization; Otimização; Path planning; Path replanning; Planejamento de trajetórias; Primitivas de movimento; Replanejamento de trajetórias; RRT; RRT

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vieira, H. L. (2014). Redução do custo computacional do algoritmo RRT através de otimização por eliminação. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/18/18153/tde-05092014-163621/ ;

Chicago Manual of Style (16^th Edition):

Vieira, Hiparco Lins. “Redução do custo computacional do algoritmo RRT através de otimização por eliminação.” 2014. Masters Thesis, University of São Paulo. Accessed January 21, 2020. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-05092014-163621/ ;.

MLA Handbook (7^th Edition):

Vieira, Hiparco Lins. “Redução do custo computacional do algoritmo RRT através de otimização por eliminação.” 2014. Web. 21 Jan 2020.

Vancouver:

Vieira HL. Redução do custo computacional do algoritmo RRT através de otimização por eliminação. [Internet] [Masters thesis]. University of São Paulo; 2014. [cited 2020 Jan 21]. Available from: http://www.teses.usp.br/teses/disponiveis/18/18153/tde-05092014-163621/ ;.

Council of Science Editors:

Vieira HL. Redução do custo computacional do algoritmo RRT através de otimização por eliminação. [Masters Thesis]. University of São Paulo; 2014. Available from: http://www.teses.usp.br/teses/disponiveis/18/18153/tde-05092014-163621/ ;

10. Antonio Carlos Vilanova. Otimização de um modelo de propagação com múltiplos obstáculos na troposfera utilizando algoritmo genético.

Degree: 2013, Federal University of Uberlândia

URL: http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4703

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This thesis presents an evaluation methodology to optimize parameters in a model of propagation of electromagnetic waves in the troposphere. The propagation model is based… (more)

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This thesis presents an evaluation methodology to optimize parameters in a model of propagation of electromagnetic waves in the troposphere. The propagation model is based on parabolic equations solved by Split-Step Fourier. This propagation model shows good efficiency and rough terrain situations where the refractivity varies with distance. The search for optimal parameters in models involving electromagnetic waves requires a large computational cost, especially in large search spaces. Aiming to reduce the computational cost in determining the parameter values that maximize the field strength at a given position of the observer was developed an application called EP-AG. The application has two main modules. The first is the propagation module that estimates the value of the electric field in the area of a given terrain irregularities and varying with the refractivity with distance. The second is the optimization module which finds the optimum antenna height and frequency of operation that lead the field to the maximum value of the land in a certain position. Initially performed only the propagation module using different profiles of land and refractivity. The results shown by contours and profile field shown the efficiency of the model. Subsequently to evaluate the optimization by genetic algorithms were used two different settings as well as the irregularity of the terrain, refractivity profile and size of the search space. In each of these settings picked up a point observation in which the value of the electric field served as a metric for comparison. At this point, we determined the optimal values of the parameters by the brute force method and the genetic algorithm optimization. The results showed that for small search spaces virtually no reduction of the computational cost, however for large search spaces, the decrease was very significant and relative errors much smaller than those obtained by the method of brute force.

Esta tese apresenta uma avaliação metodológica para otimizar parâmetros em um modelo de propagação de ondas eletromagnéticas na troposfera. O modelo de propagação é baseado em equações parabólicas resolvidas pelo Divisor de Passos de Fourier. Esse modelo de propagação apresenta boa eficiência em terrenos irregulares e situações em que a refratividade varia com a distância. A busca de parâmetros ótimos em modelos que envolvem ondas eletromagnéticas demanda um grande custo computacional, principalmente em grandes espaços de busca. Com o objetivo de diminuir o custo computacional na determinação dos valores dos parâmetros que maximizem a intensidade de campo em uma determinada posição do observador, foi desenvolvido um aplicativo denominado EP-AG. O aplicativo possui dois módulos principais. O primeiro é o módulo de propagação, que estima o valor do campo elétrico na área de um determinado terreno com irregularidades e com a refratividade variando com a distância. O segundo é o módulo de otimização, que encontra o valor ótimo da altura da antena e da frequência de operação que levam o campo ao…

Advisors/Committee Members: Gilberto Arantes Carrijo, Luciano Xavier Medeiros, Alexandre Coutinho Mateus, Paulo Sérgio Caparelli, Valtemir Emerencio do Nascimento.

Subjects/Keywords: Algoritmos genéticos; Equações parabólicas; Divisor de passos de Fourier; Custo computacional; ENGENHARIA ELETRICA; Ondas eletromagnéticas; Algoritmos genéticos; Genetic algorithms; Parabolic equations; Split-step Fourier; Computational cost

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vilanova, A. C. (2013). Otimização de um modelo de propagação com múltiplos obstáculos na troposfera utilizando algoritmo genético. (Thesis). Federal University of Uberlândia. Retrieved from http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4703

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Vilanova, Antonio Carlos. “Otimização de um modelo de propagação com múltiplos obstáculos na troposfera utilizando algoritmo genético.” 2013. Thesis, Federal University of Uberlândia. Accessed January 21, 2020. http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4703.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Vilanova, Antonio Carlos. “Otimização de um modelo de propagação com múltiplos obstáculos na troposfera utilizando algoritmo genético.” 2013. Web. 21 Jan 2020.

Vancouver:

Vilanova AC. Otimização de um modelo de propagação com múltiplos obstáculos na troposfera utilizando algoritmo genético. [Internet] [Thesis]. Federal University of Uberlândia; 2013. [cited 2020 Jan 21]. Available from: http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4703.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Vilanova AC. Otimização de um modelo de propagação com múltiplos obstáculos na troposfera utilizando algoritmo genético. [Thesis]. Federal University of Uberlândia; 2013. Available from: http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4703

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)

11. Μήττας, Νικόλαος. Στατιστικές και υπολογιστικές μέθοδοι ανάπτυξης, βελτίωσης και σύγκρισης μοντέλων πρόβλεψης κόστους λογισμικού.

Degree: 2009, Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)

URL: http://hdl.handle.net/10442/hedi/20557

► The plethora of Software Cost Estimation models proposed in the literature reveals that the prediction of the cost for a new software project is a… (more)

▼ The plethora of Software Cost Estimation models proposed in the literature reveals that the prediction of the cost for a new software project is a vital task affecting the well-balanced management of the development process. The overestimation of a project may lead to the canceling and loss of a contract, whereas the underestimation may affect the earnings of the development organization. Hence, there is an ongoing research in the SCE area attempting to build prediction models that provide accurate estimates of the cost. The present dissertation deals with the introduction of statistical and computational methods for the comparison, improvement and development of Software Cost Estimation models. More specifically, the contribution of the dissertation focuses on the following subjects. Chapter 3 deals with the comparison procedure of alternative prediction models. Since there are a lot of models that can be fitted to certain data, a crucial issue is the selection of the most efficient prediction model. Most often this selection is based on comparisons of various accuracy measures that are functions of the model’s errors. However, the usual practice is to consider as the most accurate prediction model the one providing the best accuracy measure without testing if this superiority is in fact statistically significant. This policy can lead to unstable and erroneous conclusions since a small change in the data is able to turn over the best model selection. On the other hand, the accuracy measures used in practice are statistics with unknown probability distributions, making the testing of any hypothesis, by the traditional parametric methods, problematic. In this Chapter, the use of statistical simulation tools is proposed in order to test the significance of the difference between the accuracy of two prediction methods. The statistical simulation procedures involve permutation tests and bootstrap techniques for the construction of confidence intervals for the difference of measures. These techniques repeat the data analysis a large number of times on replicated datasets, all drawn by resampling from the original observed set of data. The resampling techniques can be used on their own in carrying out a hypothesis test without worrying about the distribution of the variables or they can also be utilized with the traditional procedures in order to reinforce their results. Chapter 4 also deals with the comparison procedure of alternative prediction models, whereas the research interest focuses on the graphical investigation of the performances. More precisely, we introduce the Regression Error Characteristic analysis, a powerful visualization tool with interesting geometrical properties, in order to validate and compare different prediction models easily, by a simple inspection of a graph. The proposed formal framework covers different aspects of the estimation process such as the calibration of the prediction methodology, the assessment of the applicability of the estimation method to a specific dataset, the identification…

Subjects/Keywords: Τεχνολογία λογισμικού; Στατιστικές μέθοδοι; Υπολογιστικές μέθοδοι; Εκτίμηση με αναλογίες; Εκτίμηση κόστους λογισμικού; Αναδειγματοληψία; Πρόβλεψη; Software engineering; Statistical methods; Computational methods; Estimation by analogy; Software cost estimation; Resampling; Prediction

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Μήττας, . �. (2009). Στατιστικές και υπολογιστικές μέθοδοι ανάπτυξης, βελτίωσης και σύγκρισης μοντέλων πρόβλεψης κόστους λογισμικού. (Thesis). Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ). Retrieved from http://hdl.handle.net/10442/hedi/20557

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Μήττας, Νικόλαος. “Στατιστικές και υπολογιστικές μέθοδοι ανάπτυξης, βελτίωσης και σύγκρισης μοντέλων πρόβλεψης κόστους λογισμικού.” 2009. Thesis, Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ). Accessed January 21, 2020. http://hdl.handle.net/10442/hedi/20557.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Μήττας, Νικόλαος. “Στατιστικές και υπολογιστικές μέθοδοι ανάπτυξης, βελτίωσης και σύγκρισης μοντέλων πρόβλεψης κόστους λογισμικού.” 2009. Web. 21 Jan 2020.

Vancouver:

Μήττας �. Στατιστικές και υπολογιστικές μέθοδοι ανάπτυξης, βελτίωσης και σύγκρισης μοντέλων πρόβλεψης κόστους λογισμικού. [Internet] [Thesis]. Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ); 2009. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/10442/hedi/20557.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Μήττας �. Στατιστικές και υπολογιστικές μέθοδοι ανάπτυξης, βελτίωσης και σύγκρισης μοντέλων πρόβλεψης κόστους λογισμικού. [Thesis]. Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ); 2009. Available from: http://hdl.handle.net/10442/hedi/20557

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The Ohio State University

12. ZHENG, WEIBO. Pore-Scale Simulation of Cathode Catalyst Layers in Proton Exchange Membrane Fuel Cells (PEMFCs).

Degree: PhD, Mechanical Engineering, 2019, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1555436163992345

► Understanding the complex phenomena occurring inside the catalyst layer of a proton exchange membrane fuel cell (PEMFC) is critical to design of an optimized structure… (more)

▼ Understanding the complex phenomena occurring inside the catalyst layer of a proton exchange membrane fuel cell (PEMFC) is critical to design of an optimized structure with low platinum loading and high performance. Describing detailed physical and chemical processes in the catalyst layer at the resolution of pore scale, pore-scale simulation is considered as a promising approach for use in understanding the structure-performance relation and subsequent optimization of the catalyst layer. For wide spread use in industry, the computational cost of pore-scale simulation needs to be reduced. To achieve this goal, a multiscale decomposition method that accelerates the convergence of an iteratively-solved variable distribution in porous electrodes is proposed. The multiscale method combines the macroscopic method with pore-scale simulation by decomposing a variable distribution into the macroscopic component and local fluctuations. The decomposition removes the slowly converged, long wavelength components in an iteratively-solved variable distribution, thereby accelerating the convergence.In this research, to reduce the computational cost of multiphase pore-scale simulation, the multiscale method is applied to the electrolyte phase potential and oxygen concentration, both of which converge slowly and limit the overall computational efficiency. The results show that the multiscale method can substantially accelerate the convergence without sacrificing the accuracy. It is also found that the estimation of the effective transport property appearing in the volume-averaged part of the multiscale method influences the convergence rate of the multiscale method. With more accurate estimation of an effective transport property, the multiscale method is shown to work more effectively, especially for a thick porous electrode. Being an important parameter in the application to oxygen concentration, the effective oxygen diffusivity in pores is systematically investigated using pore-scale simulation, and empirical correlations for use in the multiscale method, as well as other macroscopic simulation methods, are obtained. The emphasis is placed on the importance of Knudsen diffusion in nanoscale pores in the catalyst layer. The results also highlight the importance of liquid water distribution on the effective diffusivity estimation and, therefore, on the computational efficiency of the multiscale method. With reduced computational cost, multiphase pore-scale simulation of a catalyst layer used in a laboratory experiment is successfully performed. The proposed multiscale decomposition method can be extended to pore-scale simulation for any porous electrodes. Advisors/Committee Members: Kim, Seung Hyun (Advisor).

Subjects/Keywords: Mechanical Engineering; multiscale method; proton exchange membrane fuel cell; catalyst layer; pore-scale simulation; multiphase flow; computational cost; effective transport property; lattice Boltzmann method; porous media

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

ZHENG, W. (2019). Pore-Scale Simulation of Cathode Catalyst Layers in Proton Exchange Membrane Fuel Cells (PEMFCs). (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1555436163992345

Chicago Manual of Style (16^th Edition):

ZHENG, WEIBO. “Pore-Scale Simulation of Cathode Catalyst Layers in Proton Exchange Membrane Fuel Cells (PEMFCs).” 2019. Doctoral Dissertation, The Ohio State University. Accessed January 21, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555436163992345.

MLA Handbook (7^th Edition):

ZHENG, WEIBO. “Pore-Scale Simulation of Cathode Catalyst Layers in Proton Exchange Membrane Fuel Cells (PEMFCs).” 2019. Web. 21 Jan 2020.

Vancouver:

ZHENG W. Pore-Scale Simulation of Cathode Catalyst Layers in Proton Exchange Membrane Fuel Cells (PEMFCs). [Internet] [Doctoral dissertation]. The Ohio State University; 2019. [cited 2020 Jan 21]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1555436163992345.

Council of Science Editors:

ZHENG W. Pore-Scale Simulation of Cathode Catalyst Layers in Proton Exchange Membrane Fuel Cells (PEMFCs). [Doctoral Dissertation]. The Ohio State University; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1555436163992345

Universidade do Minho

13. Marques, Raquel Marina Coelho. Uma abordagem construtivista de “Terra no Espaço”: um estudo centrado nas explicações dos alunos do 7.º ano de escolaridade .

Degree: 2019, Universidade do Minho

URL: http://hdl.handle.net/1822/62144

► Em Portugal, a Astronomia é um tema ensinado aos alunos do 3.º ciclo do ensino básico (7.º ano de escolaridade), mas muitas vezes gera explicações… (more)

Subjects/Keywords: Atividades com materiais de baixo custo; Construtivismo; Ensino de astronomia; Simulação computacional; Activities with low cost materials; Astronomy teaching; Computational simulation; Constructivism

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Marques, R. M. C. (2019). Uma abordagem construtivista de “Terra no Espaço”: um estudo centrado nas explicações dos alunos do 7.º ano de escolaridade . (Masters Thesis). Universidade do Minho. Retrieved from http://hdl.handle.net/1822/62144

Chicago Manual of Style (16^th Edition):

Marques, Raquel Marina Coelho. “Uma abordagem construtivista de “Terra no Espaço”: um estudo centrado nas explicações dos alunos do 7.º ano de escolaridade .” 2019. Masters Thesis, Universidade do Minho. Accessed January 21, 2020. http://hdl.handle.net/1822/62144.

MLA Handbook (7^th Edition):

Marques, Raquel Marina Coelho. “Uma abordagem construtivista de “Terra no Espaço”: um estudo centrado nas explicações dos alunos do 7.º ano de escolaridade .” 2019. Web. 21 Jan 2020.

Vancouver:

Marques RMC. Uma abordagem construtivista de “Terra no Espaço”: um estudo centrado nas explicações dos alunos do 7.º ano de escolaridade . [Internet] [Masters thesis]. Universidade do Minho; 2019. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/1822/62144.

Council of Science Editors:

Marques RMC. Uma abordagem construtivista de “Terra no Espaço”: um estudo centrado nas explicações dos alunos do 7.º ano de escolaridade . [Masters Thesis]. Universidade do Minho; 2019. Available from: http://hdl.handle.net/1822/62144

Universitat Pompeu Fabra

14. Marcos Sanmartín, Encarni. Embodied decision making and its neural substrate.

Degree: Departament de Tecnologies de la Informació i les Comunicacions, 2014, Universitat Pompeu Fabra

URL: http://hdl.handle.net/10803/285379

► Les decisions són el resultat d'un procés de deliberació que avalua la idoneïtat d'opcions específiques. Els estudis sobre la presa de decisions han estat principalment… (more)

Subjects/Keywords: Embodiment; Decision making; Robots; Across-trials variability; Memory; Context; Motor cost; Modulation; Uncertainty; Computational model; Corporificación; Toma de decisiones; Variabilidad entre pruebas; Memoria; Contexto; Coste motor; Modulación; Incertidumbre; Modelo computacional; Corporificació; Presa de decisions; Variabilitat entre proves; Memòria; Context; Cost motor; Modulació; Incertesa; Model computacional; 62

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Marcos Sanmartín, E. (2014). Embodied decision making and its neural substrate. (Thesis). Universitat Pompeu Fabra. Retrieved from http://hdl.handle.net/10803/285379

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Marcos Sanmartín, Encarni. “Embodied decision making and its neural substrate.” 2014. Thesis, Universitat Pompeu Fabra. Accessed January 21, 2020. http://hdl.handle.net/10803/285379.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Marcos Sanmartín, Encarni. “Embodied decision making and its neural substrate.” 2014. Web. 21 Jan 2020.

Vancouver:

Marcos Sanmartín E. Embodied decision making and its neural substrate. [Internet] [Thesis]. Universitat Pompeu Fabra; 2014. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/10803/285379.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Marcos Sanmartín E. Embodied decision making and its neural substrate. [Thesis]. Universitat Pompeu Fabra; 2014. Available from: http://hdl.handle.net/10803/285379

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

15. Μητροπούλου, Χαρίκλεια. Advanced computational methods for seismic design and assessment of reinforced concrete structures.

Degree: 2011, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/24794

►

The major objective of this Dissertation is to develop an integrated framework for the economical and safe antiseismic design and assessment of new reinforced concrete… (more)

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The major objective of this Dissertation is to develop an integrated framework for the economical and safe antiseismic design and assessment of new reinforced concrete structures by means of life-cycle cost and fragility analysis. This objective of the dissertation is achieved through the accomplishment of the following tasks: (i) At the first part of the Dissertation numerical calibration for some of the most popular damage indices (DIs) that have been proposed by many researchers was performed, in order to quantify the extent of damage in reinforced concrete structures. (ii) A critical assessment of prescriptive design procedures was performed with reference to their ability to lead to safe and economical designs. Furthermore, a comparison between prescriptive and performance-based seismic design procedures was carried out. For this purpose a number of structural seismic design optimisation problems have been formulated. On the other hand, based on the calibrated DIs, structural optimization problems were formulated aiming at identifying the DI, or the combination of Dis that will provide reliable information on damage so that they can be incorporated into a Performance-Based Design framework. The ultimate objective of this task is to compare lower-bound designs that satisfy the design code requirements in the most cost-effective way using a Life-Cycle Cost Analysis (LCCA) methodology. (iii) The next step is to improve the LCCA procedure with reference to both its robustness and efficiency. (iv) The last objective of the dissertation is to improve the fragility analysis procedure with reference to both robustness and efficiency. The efficiency is achieved by introducing a neural network-based incremental dynamic analysis (IDA) procedure that reduces the computational effort by one order of magnitude.

Ο κύριος στόχος της διατριβής ήταν η ανάπτυξη ενός ολοκληρωμένου πλαισίου για την αξιολόγηση και τον οικονομικό-ασφαλή αντισεισμικό σχεδιασμό κατασκευών. Αυτός ο καθολικός στόχος της διατριβής επετεύχθη μέσω των ακόλουθων βημάτων: (i) Στο πρώτο μέρος της διατριβής πραγματοποιήθηκε αριθμητική βαθμονόμηση ορισμένων από τους πιο δημοφιλείς δείκτες βλάβης που έχουν προταθεί και υιοθετηθεί από πολλούς ερευνητές προκειμένου να προσδιορίσουν το επίπεδο ζημίας κατασκευών από οπλισμένο σκυρόδεμα. (ii) Στο δεύτερο στάδιο της διατριβής πραγματοποιήθηκε αξιολόγηση των περιγραφικών διαδικασιών αντισεισμικού σχεδιασμού σε σχέση με τον συντελεστή συμπεριφοράς που υιοθετείται από τους Ευρωκώδικες και διερευνήθηκε η βέλτιστη επιλογή που οδηγεί στον οικονομικότερο και ασφαλέστερο σχεδιασμό. Επιπροσθέτως έγινε σύγκριση των μεθόδων σχεδιασμού με βάση την επίδοση σε σχέση με τις περιγραφικές μεθόδους σχεδιασμού. Στη συνέχεια, με βάση τους βαθμονομημένους δείκτες βλάβης, διατυπώθηκαν προβλήματα βελτιστοποίησης με στόχο να προσδιοριστεί ο δείκτης βλάβης ή ο συνδυασμός δεικτών βλάβης που αποτελούν την σωστότερη επιλογή προκειμένου να ενσωματωθεί στο πλαίσιο σχεδιασμού που βασίζεται στην επιτελεστικότητα. (iii) Ως επόμενο βήμα της διατριβής…

Subjects/Keywords: Υπολογιστική αντισεισμική μηχανική; Δείκτες βλάβης; Ανάλυση κόστους κύκλου ζωής; Ανάλυση τρωτότητας; Βέλτιστος σχεδιασμός; Νευρωνικά δίκτυα; Computational earthquake engineering; Damage indices; Life cycle cost analysis; Fragility analysis; Optimum design of structures; Neural networks

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Μητροπούλου, . �. (2011). Advanced computational methods for seismic design and assessment of reinforced concrete structures. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/24794

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Μητροπούλου, Χαρίκλεια. “Advanced computational methods for seismic design and assessment of reinforced concrete structures.” 2011. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed January 21, 2020. http://hdl.handle.net/10442/hedi/24794.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Μητροπούλου, Χαρίκλεια. “Advanced computational methods for seismic design and assessment of reinforced concrete structures.” 2011. Web. 21 Jan 2020.

Vancouver:

Μητροπούλου �. Advanced computational methods for seismic design and assessment of reinforced concrete structures. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2011. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/10442/hedi/24794.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Μητροπούλου �. Advanced computational methods for seismic design and assessment of reinforced concrete structures. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2011. Available from: http://hdl.handle.net/10442/hedi/24794

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toledo

16. Lee, Jin Woo. Multi-level Decoupled Optimization of Wind Turbine Structures Using Coefficients of Approximating Functions as Design Variables.

Degree: PhD, Mechanical Engineering, 2017, University of Toledo

URL: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1501003238831086

► This dissertation proposes a multi-level optimization method for slender structures such as blades or towers of wind turbine structures. This method is suited performing structural… (more)

▼ This dissertation proposes a multi-level optimization method for slender structures such as blades or towers of wind turbine structures. This method is suited performing structural optimizations of slender structures with a large number of design variables (DVs). The proposed method uses a two-level optimization process: a high-level for a global optimization of a structure and a low-level for optimizations of sectioned computational stations of the structure. The high-level optimization uses approximating functions to define target structural properties along the length of a structure, such as stiffness. The approximating functions are functions of the distance from the root of the structure that are defined using basis functions such as polynomials or exponential functions. The high-level DVs are the coefficients of the functions. Thus, the number of the high-level DVs is independent of the number of sections. Moreover, selecting smooth approximating functions help to obtain alternative designs with smooth shapes.The low-level optimization finds an optimum parametric design, such as laminate layups, that matches with the target structural properties defined at the high-level optimization. At the low-level optimization, the proposed method uses an optimizer in each section. Each optimizer is independent of the optimizers in the other sections, thereby decomposing a large optimization problem into several small ones. This approach reduces the number of DVs per optimizer at the low-level optimization which reduces the design space of each section and eliminates the design space of coupling between sections. Once optimum designs are found from all sections at the low-level, the high-level solvers evaluate them for the entire structure.The advantage of the proposed method is that it reduces the number of iterations of the high-level optimization because it considers a small number of high-level DVs. Computational efficiency increases because the computationally extensive high-level solvers need to be run less frequently to obtain an optimum solution. An additional advantage of the proposed method is that it produces many feasible alternatives.Using example problems, the paper demonstrates that the proposed method converges faster in the early iterations, and generates more alternative designs with smooth geometry than traditional single-level methods. Advisors/Committee Members: Nikolaidis, Efstratios (Committee Chair), Devabhaktuni, Vijay (Committee Co-Chair), Afjeh, Abdollah (Committee Co-Chair).

Subjects/Keywords: Energy; Engineering; Environmental Economics; Environmental Engineering; Mechanical Engineering; Operations Research; Aerospace Engineering; optimization; multi-level; decoupled; structural; design; analysis; approximating function; design variable; computational cost; composite material; renewable energy; wind turbine; blade; tower; modeFRONTIER; FAST; Department of Energy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lee, J. W. (2017). Multi-level Decoupled Optimization of Wind Turbine Structures Using Coefficients of Approximating Functions as Design Variables. (Doctoral Dissertation). University of Toledo. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=toledo1501003238831086

Chicago Manual of Style (16^th Edition):

Lee, Jin Woo. “Multi-level Decoupled Optimization of Wind Turbine Structures Using Coefficients of Approximating Functions as Design Variables.” 2017. Doctoral Dissertation, University of Toledo. Accessed January 21, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1501003238831086.

MLA Handbook (7^th Edition):

Lee, Jin Woo. “Multi-level Decoupled Optimization of Wind Turbine Structures Using Coefficients of Approximating Functions as Design Variables.” 2017. Web. 21 Jan 2020.

Vancouver:

Lee JW. Multi-level Decoupled Optimization of Wind Turbine Structures Using Coefficients of Approximating Functions as Design Variables. [Internet] [Doctoral dissertation]. University of Toledo; 2017. [cited 2020 Jan 21]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1501003238831086.

Council of Science Editors:

Lee JW. Multi-level Decoupled Optimization of Wind Turbine Structures Using Coefficients of Approximating Functions as Design Variables. [Doctoral Dissertation]. University of Toledo; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1501003238831086

17. Δροσίτης, Ιωάννης. Δρομολόγηση φωλιασμένων βρόχων με τη χρήση μεθόδων υπολογιστικής γεωμετρίας.

Degree: 2002, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/16725

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One of the major problems in the area of parallel processing, is scheduling nested loops. This thesis studies the problem of scheduling nested loops with… (more)

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One of the major problems in the area of parallel processing, is scheduling nested loops. This thesis studies the problem of scheduling nested loops with uniform dependencies, focusing onto the geometric properties of the index space and the dependence vectors of the problem. Initially, a new algorithm for mapping onto distributed memory architectures is presented. The followed technique is based on mapping onto systolic arrays. After the index space transformation is performed, the transformed index space needs to be partitioned and mapped to the given architecture. The partitioning is made along the directions of the transformed index space boundaries. This method achieves optimal load balancing between processors, although scheduling complexity is not optimal. After that, the geometric properties of the index space considered in the uniform nested loop problems are studied. The formal expressions that give the execution wavefront of any time instance are presented. Although they can only be solved by integer linear programming techniques, it is the first time they are computed in closed form. Some special cases are also noted. In these cases, certain inequalities between the algorithm dependence vectors hold and the complexity of computing the execution wavefront decreases dramatically: it can be computed in polynomial or even linear time. Based on the above geometric properties, a technique for scheduling any nested loop problem that follows the unit execution - zero communication time model - UET is presented. This scheduling method is nearly optimal. In addition to the above, we introduce a method of reducing problems that consider the unit execution - unit communication time model - UET-UCT to pure UET equivalent ones. This is one of the main contributions of our work, as it enables any scheduling technique of the bibliography for the UET cases, to apply to any problem that considers unit communication cost. During the scheduling algorithms presented in this thesis, a new method of computing the hyperplane vector Π is concerned. This method is explicitly based on the algorithm dependence vectors and on how these vectors allow the execution of the index space points. Actually, it is a revision of the convex hull computing method, called QuickHull. It should be noted that, in comparison with all other methods of the bibliography, it achieves quite a small complexity. Finally, the generalization of the above scheduling techniques for n-dimensional problems is presented. Certain simulation programs have been implemented, in order to testify the scheduling methods of this thesis. The proposed geometric method is compared with the hyperplane one, as well as with the exhaustive scheduling procedure, also called optimal. The comparison results are analytically presented.

Πρωταρχικό πρόβλημα στο χώρο της παράλληλης επεξεργασίας, αποτελεί η δρομολόγηση φωλιασμένων βρόχων. Η παρούσα διατριβή μελετά τη δρομολόγηση φωλιασμένων βρόχων με ομοιόμορφες εξαρτήσεις, εστιάζοντας στις γεωμετρικές ιδιότητες των εξαρτήσεων και…

Subjects/Keywords: Δρομολόγηση; Φωλιασμένοι βρόχοι; Κόστος επικοινωνίας; Υπολογιστική γεωμετρία; Κυρτό περίγραμμα; Scheduling; Nested loops; Communication cost; Computational geometry; Convex hull; UET - UCT

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Δροσίτης, . �. (2002). Δρομολόγηση φωλιασμένων βρόχων με τη χρήση μεθόδων υπολογιστικής γεωμετρίας. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/16725

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Δροσίτης, Ιωάννης. “Δρομολόγηση φωλιασμένων βρόχων με τη χρήση μεθόδων υπολογιστικής γεωμετρίας.” 2002. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed January 21, 2020. http://hdl.handle.net/10442/hedi/16725.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Δροσίτης, Ιωάννης. “Δρομολόγηση φωλιασμένων βρόχων με τη χρήση μεθόδων υπολογιστικής γεωμετρίας.” 2002. Web. 21 Jan 2020.

Vancouver:

Δροσίτης �. Δρομολόγηση φωλιασμένων βρόχων με τη χρήση μεθόδων υπολογιστικής γεωμετρίας. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2002. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/10442/hedi/16725.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Δροσίτης �. Δρομολόγηση φωλιασμένων βρόχων με τη χρήση μεθόδων υπολογιστικής γεωμετρίας. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2002. Available from: http://hdl.handle.net/10442/hedi/16725

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

18. Herouard, Nicolas. Optimisation, analyse et comparaison de méthodes numériques déterministes par la dynamique des gaz raréfiés : Optimization, analysis and comparison of deterministic numerical methods for rarefied gas dynamics.

Degree: Docteur es, Mathématiques appliquées et calcul scientifique, 2014, Bordeaux

URL: http://www.theses.fr/2014BORD0473

►

Lors de la rentrée atmosphérique, l’écoulement raréfié de l’air autour de l’objet rentrant est régi par un modèle cinétique dérivé de l’équation de Boltzmann ;… (more)

▼

Lors de la rentrée atmosphérique, l’écoulement raréfié de l’air autour de l’objet rentrant est régi par un modèle cinétique dérivé de l’équation de Boltzmann ; celui-ci décrit l’évolution d’une fonction de distribution des particules de gaz dans l’espace des phases, de dimension 6 dans le cas général. La simulation numérique déterministe de cet écoulement requiert donc le traitement d’une quantité considérable de données, soit un espace mémoire et un temps de calcul importants. Nous étudions dans ce travail différents moyens de réduire le coût de ces calculs. La première approche est une méthode permettant d’optimiser la taille de la grille de vitesses discrètes employée dans le calcul par une prédiction de l’allure des fonctions de distribution dans l’espace des vitesses, en supposant un faible déséquilibre thermodynamique du gaz. La seconde approche consiste à essayer d’exploiter les propriétés de préservation asymptotique des schémas Galerkin Discontinu, déjà établies dans le cadre du transport linéaire des neutrons, qui permettent de tenir compte des effets de la couche limite cinétique sans que celle-ci soit résolue par le maillage, alors que les méthodes classiques (comme les Volumes Finis) imposent l’utilisation de maillages très raffinés en zone de proche paroi. Dans une dernière partie, nous comparons les performances respectives de ces schémas Galerkin Discontinu et de quelques schémas Volumes Finis, appliqués au modèle BGK sur un cas simple, en étudiant en particulier leur comportement près des parois et les conditions aux limites numériques.

During the atmospheric re-entry of a space engine, the rarefied air flow around the body is determined by a kinetic model derived from the Boltzmann equation, which describes the evolution of a distribution function of gas molecules in the phase space, this means a 6-dimensional space in the general case. Consequently, a deterministic numerical simulation of this flow requires large computational ressources, both in memory storage and CPU time. The aim of this work is to reduce those ressources, using two different approaches. The first one is a method allowing to optimize the size of the discrete velocity grid used for the computation by a prediction of the shape of the distributions in the velocity space, assuming that the gas is close to thermodynamic equilibrium. The second approach is an attempt to use the asymptotic preservation properties of Discontinuous Galerkin schemes, already established for neutron transport, which allow to take into account the effects of kinetic boundary layers even if they are not resolved by the mesh, while classical methods (such as Finite Volumes) require very refined meshes along the direction normal to the walls. In a last part, we compare the performances of these Discontinuous Galerkin schemes with some classical Finite Volumes schemes, applied to the BGK equation in a simple case, and pay particular attention to their near-wall behavior and numerical boundary conditions.

Advisors/Committee Members: Mieussens, Luc (thesis director).

Subjects/Keywords: Aérodynamique; Conditions aux limites; Équation de Boltzmann-BGK; Coût de calcul; Limite asymptotique; Schémas Galerkin Discontinu; Méthodes numériques; Régime raréfié; Aerodynamics; Boundary conditions; Computational cost; Asymptotic limit; Discontinuous Galerkin schemes; Numerical methods; Boltzmann-BGK equation; Rarefied regime

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Herouard, N. (2014). Optimisation, analyse et comparaison de méthodes numériques déterministes par la dynamique des gaz raréfiés : Optimization, analysis and comparison of deterministic numerical methods for rarefied gas dynamics. (Doctoral Dissertation). Bordeaux. Retrieved from http://www.theses.fr/2014BORD0473

Chicago Manual of Style (16^th Edition):

Herouard, Nicolas. “Optimisation, analyse et comparaison de méthodes numériques déterministes par la dynamique des gaz raréfiés : Optimization, analysis and comparison of deterministic numerical methods for rarefied gas dynamics.” 2014. Doctoral Dissertation, Bordeaux. Accessed January 21, 2020. http://www.theses.fr/2014BORD0473.

MLA Handbook (7^th Edition):

Herouard, Nicolas. “Optimisation, analyse et comparaison de méthodes numériques déterministes par la dynamique des gaz raréfiés : Optimization, analysis and comparison of deterministic numerical methods for rarefied gas dynamics.” 2014. Web. 21 Jan 2020.

Vancouver:

Herouard N. Optimisation, analyse et comparaison de méthodes numériques déterministes par la dynamique des gaz raréfiés : Optimization, analysis and comparison of deterministic numerical methods for rarefied gas dynamics. [Internet] [Doctoral dissertation]. Bordeaux; 2014. [cited 2020 Jan 21]. Available from: http://www.theses.fr/2014BORD0473.

Council of Science Editors:

Herouard N. Optimisation, analyse et comparaison de méthodes numériques déterministes par la dynamique des gaz raréfiés : Optimization, analysis and comparison of deterministic numerical methods for rarefied gas dynamics. [Doctoral Dissertation]. Bordeaux; 2014. Available from: http://www.theses.fr/2014BORD0473

19. Viricel, Clement. Contributions au développement d'outils computationnels de design de protéine : méthodes et algorithmes de comptage avec garantie : Contribution to protein design tools : counting methods and algorithms.

Degree: Docteur es, Mathématiques Appliquées, 2017, Toulouse, INSA

URL: http://www.theses.fr/2017ISAT0019

►

Cette thèse porte sur deux sujets intrinsèquement liés : le calcul de la constante de normalisation d’un champ de Markov et l’estimation de l’affinité de… (more)

▼

Cette thèse porte sur deux sujets intrinsèquement liés : le calcul de la constante de normalisation d’un champ de Markov et l’estimation de l’affinité de liaison d’un complexe de protéines. Premièrement, afin d’aborder ce problème de comptageP complet, nous avons développé Z*, basé sur un élagage des quantités de potentiels négligeables. Il s’est montré plus performant que des méthodes de l’état de l’art sur des instances issues d’interaction protéine-protéine. Par la suite, nous avons développé #HBFS, un algorithme avec une garantie anytime, qui s’est révélé plus performant que son prédécesseur. Enfin, nous avons développé BTDZ, un algorithme exact basé sur une décomposition arborescente qui a fait ses preuves sur des instances issues d’interaction intermoléculaire appelées “superhélices”. Ces algorithmes s’appuient sur des méthodes issuse des modèles graphiques : cohérences locales, élimination de variable et décompositions arborescentes. A l’aide de méthodes d’optimisation existantes, de Z* et des fonctions d’énergie de Rosetta, nous avons développé un logiciel open source estimant la constante d’affinité d’un complexe protéine protéine sur une librairie de mutants. Nous avons analysé nos estimations sur un jeu de données de complexes de protéines et nous les avons confronté à deux approches de l’état de l’art. Il en est ressorti que notre outil était qualitativement meilleur que ces méthodes.

This thesis is focused on two intrinsically related subjects : the computation of the normalizing constant of a Markov random field and the estimation of the binding affinity of protein-protein interactions. First, to tackle this #P-complete counting problem, we developed Z*, based on the pruning of negligible potential quantities. It has been shown to be more efficient than various state-of-the-art methods on instances derived from protein-protein interaction models. Then, we developed #HBFS, an anytime guaranteed counting algorithm which proved to be even better than its predecessor. Finally, we developed BTDZ, an exact algorithm based on tree decomposition. BTDZ has already proven its efficiency on intances from coiled coil protein interactions. These algorithms all rely on methods stemming from graphical models : local consistencies, variable elimination and tree decomposition. With the help of existing optimization algorithms, Z* and Rosetta energy functions, we developed a package that estimates the binding affinity of a set of mutants in a protein-protein interaction. We statistically analyzed our esti- mation on a database of binding affinities and confronted it with state-of-the-art methods. It appears that our software is qualitatively better than these methods.

Advisors/Committee Members: Schiex, Thomas (thesis director), Barbe, Sophie (thesis director).

Subjects/Keywords: Modèle graphique; Champ de Markov; Réseau de fonctions de coût; Comptage; P complet; Fonction de partition; Constante de normalisation; Design computationnel de protéine; Affinité de liaison; Interaction protéine-protéine; Algorithm; Markov random field; Cost function network; Couning; #P complete; Partition function; Normalizing constant; Computational protein design; Binding affinity; Protein-protein interaction; 510; 004

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Viricel, C. (2017). Contributions au développement d'outils computationnels de design de protéine : méthodes et algorithmes de comptage avec garantie : Contribution to protein design tools : counting methods and algorithms. (Doctoral Dissertation). Toulouse, INSA. Retrieved from http://www.theses.fr/2017ISAT0019

Chicago Manual of Style (16^th Edition):

Viricel, Clement. “Contributions au développement d'outils computationnels de design de protéine : méthodes et algorithmes de comptage avec garantie : Contribution to protein design tools : counting methods and algorithms.” 2017. Doctoral Dissertation, Toulouse, INSA. Accessed January 21, 2020. http://www.theses.fr/2017ISAT0019.

MLA Handbook (7^th Edition):

Viricel, Clement. “Contributions au développement d'outils computationnels de design de protéine : méthodes et algorithmes de comptage avec garantie : Contribution to protein design tools : counting methods and algorithms.” 2017. Web. 21 Jan 2020.

Vancouver:

Viricel C. Contributions au développement d'outils computationnels de design de protéine : méthodes et algorithmes de comptage avec garantie : Contribution to protein design tools : counting methods and algorithms. [Internet] [Doctoral dissertation]. Toulouse, INSA; 2017. [cited 2020 Jan 21]. Available from: http://www.theses.fr/2017ISAT0019.

Council of Science Editors:

Viricel C. Contributions au développement d'outils computationnels de design de protéine : méthodes et algorithmes de comptage avec garantie : Contribution to protein design tools : counting methods and algorithms. [Doctoral Dissertation]. Toulouse, INSA; 2017. Available from: http://www.theses.fr/2017ISAT0019

20. Li, Zhongliang. Data-driven fault diagnosis for PEMFC systems : Integrating representation and classification methods for obstacle detection in road scenes.

Degree: Docteur es, Automatique, 2014, Aix Marseille Université

URL: http://www.theses.fr/2014AIXM4335

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Cette thèse est consacrée à l'étude de diagnostic de pannes pour les systèmes pile à combustible de type PEMFC. Le but est d'améliorer la fiabilité… (more)

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Cette thèse est consacrée à l'étude de diagnostic de pannes pour les systèmes pile à combustible de type PEMFC. Le but est d'améliorer la fiabilité et la durabilité de la membrane électrolyte polymère afin de promouvoir la commercialisation de la technologie des piles à combustible. Les approches explorées dans cette thèse sont celles du diagnostic guidé par les données. Les techniques basées sur la reconnaissance de forme sont les plus utilisées. Dans ce travail, les variables considérées sont les tensions des cellules. Les résultats établis dans le cadre de la thèse peuvent être regroupés en trois contributions principales.La première contribution est constituée d'une étude comparative. Plus précisément, plusieurs méthodes sont explorées puis comparées en vue de déterminer une stratégie précise et offrant un coût de calcul optimal.La deuxième contribution concerne le diagnostic online sans connaissance complète des défauts au préalable. Il s'agit d'une technique adaptative qui permet d'appréhender l'apparition de nouveaux types de défauts. Cette technique est fondée sur la méthodologie SSM-SVM et les règles de détection et de localisation ont été améliorées pour répondre au problème du diagnostic en temps réel.La troisième contribution est obtenue à partir méthodologie fondée sur l'utilisation partielle de modèles dynamiques. Le principe de détection et localisation de défauts est fondé sur des techniques d'identification et sur la génération de résidus directement à partir des données d'exploitation.Toutes les stratégies proposées dans le cadre de la thèse ont été testées à travers des données expérimentales et validées sur un système embarqué.

Aiming at improving the reliability and durability of Polymer Electrolyte Membrane Fuel Cell (PEMFC) systems and promote the commercialization of fuel cell technologies, this thesis work is dedicated to the fault diagnosis study for PEMFC systems. Data-driven fault diagnosis is the main focus in this thesis. As a main branch of data-driven fault diagnosis, the methods based on pattern classification techniques are firstly studied. Taking individual fuel cell voltages as original diagnosis variables, several representative methodologies are investigated and compared from the perspective of online implementation.Specific to the defects of conventional classification based diagnosis methods, a novel diagnosis strategy is proposed. A new classifier named Sphere-Shaped Multi-class Support Vector Machine (SSM-SVM) and modified diagnostic rules are utilized to realize the novel fault recognition. While an incremental learning method is extended to achieve the online adaptation.Apart from the classification based diagnosis approach, a so-called partial model-based data-driven approach is introduced to handle PEMFC diagnosis in dynamic processes. With the aid of a subspace identification method (SIM), the model-based residual generation is designed directly from the normal and dynamic operating data. Then, fault detection and isolation are further realized by evaluating the…

Advisors/Committee Members: Outbib, Rachid (thesis director), Giurgea, Stefan (thesis director), Hissel, Daniel (thesis director).

Subjects/Keywords: Système PEMFC; Diagnostic en ligne; Des tensions cellulaires; Reconnaissance de forme; La précision du diagnostic; Le coût de calcul; Systèmes embarqués; La détection des défauts roman; Adaptation en ligne; L'identification du modèle; PEMFC system; Online diagnosis; Cell voltages; Pattern classification; Diagnosis accuracy; Computational cost; Embedded system; Novel fault detection; Online adaptation; Model identification

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APA (6^th Edition):

Li, Z. (2014). Data-driven fault diagnosis for PEMFC systems : Integrating representation and classification methods for obstacle detection in road scenes. (Doctoral Dissertation). Aix Marseille Université. Retrieved from http://www.theses.fr/2014AIXM4335

Chicago Manual of Style (16^th Edition):

Li, Zhongliang. “Data-driven fault diagnosis for PEMFC systems : Integrating representation and classification methods for obstacle detection in road scenes.” 2014. Doctoral Dissertation, Aix Marseille Université. Accessed January 21, 2020. http://www.theses.fr/2014AIXM4335.

MLA Handbook (7^th Edition):

Li, Zhongliang. “Data-driven fault diagnosis for PEMFC systems : Integrating representation and classification methods for obstacle detection in road scenes.” 2014. Web. 21 Jan 2020.

Vancouver:

Li Z. Data-driven fault diagnosis for PEMFC systems : Integrating representation and classification methods for obstacle detection in road scenes. [Internet] [Doctoral dissertation]. Aix Marseille Université 2014. [cited 2020 Jan 21]. Available from: http://www.theses.fr/2014AIXM4335.

Council of Science Editors:

Li Z. Data-driven fault diagnosis for PEMFC systems : Integrating representation and classification methods for obstacle detection in road scenes. [Doctoral Dissertation]. Aix Marseille Université 2014. Available from: http://www.theses.fr/2014AIXM4335

21. MADHUKAR, ENUGURTHI. GENERATE TEST SELECTION STATISTICS WITH AUTOMATED MUTATION TESTING.

Degree: 2018, , Department of Computer Science and Engineering

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-16836

► Context: The goal of this research is to form a correlation between code packages and test cases which is done by using automated weak… (more)

▼ Context: The goal of this research is to form a correlation between code packages and test cases which is done by using automated weak mutation. The correlations formed is used as the statistical test data for selecting relevant tests from the test suite which decreases the size of the test suite and speed up the process. Objectives: In this study, we have done an investigation of existing methods for reducing the computational cost of automatic mutation testing. After the investigation, we build an open source automatic mutation tool that mutates the source code to run on the test cases of the mutated code that maps the failed test to the part of the code that was changed. The failed test cases give the correlation between the test and the source code which is collected as data for future use of the test selection. Methods: Literature review and Experimentation is chosen for this research. It was a controlled experiment done at the Swedish ICT company to mutate the camera codes and test them using the regression test suite. The camera codes provided are from the continuous integration of historical data. We have chosen experimentation as our research because as this method of research is more focused on analyzing the data and implementing a tool using historical data. A literature review is done to know what kind of mutation testing reduces the computational cost of the testing process. The implementation of this process is done by using experimentation Results: The comparative results obtained after mutating the source code with regular mutants and weak mutants we have found that regular mutants and weak mutants are compared with their correlation accuracy and we found that on regular mutation operators we got 62.1% correlation accuracy and coming to weak mutation operators we got 85% of the correlation accuracy. Conclusions: This research on experimentation to form the correlations in generating test selection statistics using automated mutation testing in the continuous integration environment for improving test cases selection in regression testing

Subjects/Keywords: Automation Testing; Test case Selection; Mutation Testing; Weak Mutants; Computational Cost; Regression Testing; Continuous Integration.; Computer Sciences; Datavetenskap (datalogi)

…27 6.5 REDUCTION OF COMPUTATIONAL COST… …Explanation Generated higher order mutants but cannot reduce the computational cost. Generated… …mutants. Using semantic mutation tool leads to an increase in the computational cost. C mutate… …computational cost of the mutation testing process. This is the motivation for considering Milu as our… …computational cost of the system. By using this we are not affecting any code quality. The…

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APA (6^th Edition):

MADHUKAR, E. (2018). GENERATE TEST SELECTION STATISTICS WITH AUTOMATED MUTATION TESTING. (Thesis). , Department of Computer Science and Engineering. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-16836

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

MADHUKAR, ENUGURTHI. “GENERATE TEST SELECTION STATISTICS WITH AUTOMATED MUTATION TESTING.” 2018. Thesis, , Department of Computer Science and Engineering. Accessed January 21, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-16836.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

MADHUKAR, ENUGURTHI. “GENERATE TEST SELECTION STATISTICS WITH AUTOMATED MUTATION TESTING.” 2018. Web. 21 Jan 2020.

Vancouver:

MADHUKAR E. GENERATE TEST SELECTION STATISTICS WITH AUTOMATED MUTATION TESTING. [Internet] [Thesis]. , Department of Computer Science and Engineering; 2018. [cited 2020 Jan 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-16836.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

MADHUKAR E. GENERATE TEST SELECTION STATISTICS WITH AUTOMATED MUTATION TESTING. [Thesis]. , Department of Computer Science and Engineering; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-16836

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

22. Mojir, Kayran Yousefi. A Computational Model for Optimal Dimensional Speed on New High-Speed Lines.

Degree: Information and Communication Technology (ICT), 2011, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37230

► High Speed Lines (HSL) in rail passenger services are regarded as one of the most significant projects in many countries comparing to other projects… (more)

▼ High Speed Lines (HSL) in rail passenger services are regarded as one of the most significant projects in many countries comparing to other projects in the transportation area. According to the EU (European Council Directive 96/48/EC,2004) , high-speed lines are either new-built lines for speeds of 250km/h or greater, or in some cases upgraded traditional lines. At the beginning of 2008, there were 10,000 km of new HSL lines in operation, and by taking into account the upgraded conventional lines, in total, there were 20,000 km line in the world. The network is growing fast because of the demand for short travelling time and comfort isincreasing rapidly. Since HSL projects require a lot of capital, it is getting more important for governments and companies to estimate and to calculate the total costs and benefits of building, maintaining, and operating of HSL so that they can decide better and more reliable in choosing between projects. There are many parameters which affect the total costs and benefits of an HSL. The most important parameter is dimensional speed which has a great influence on other parameters. For example, tunnels need larger cross section for higher speed which increases construction costs. More important, higher speed also influences the number of passengers attracted from other modes of transport. Due to a large number of speed-dependant parameters, it is not a simple task to estimate an optimal dimensional speed by calculating the costs and benefits of an HSL manually. It is also difficult to do analysis for different speeds, as speed changes many other relevant parameters. As a matter of fact, there is a need for a computational model to calculate the cost-benefit for different speeds. Based on the computational model, it is possible to define different scenarios and compare them to each other to see what the potentially optimal speed would be for a new HSL project. Besides the optimal speed, it is also possible to analyze and find effects of two other important parameters, fare and frequency, by cost-benefit analysis (CBA). The probability model used in the calculation is based on an elasticity model, and input parameters are subject to flexibility to calibrate the model appropriately. Optimal high-speed line (OHSL) tool is developed to make the model accessible for the users.

Subjects/Keywords: HSL (High Speed Line); dimensional speed; computational model; speeddependant parameter; elasticity model; CBA (Cost Benefit Analysis); OHSL

…49 A Computational model for HSL ver. 1.0| April 2011 TABLE 6.1 : COST-BENEFIT VALUES FOR… …categorized into two parts (figure 1.1): The first is to create a computational cost… …cost of building and A Computational model for HSL ver. 1.0| April 2011 1.6 Options… …A Computational model for HSL ver. 1.0| April 2011 5.5 DIFFERENT OUTPUTS OF THE OHSL… …97 COST-BENEFIT FOR DIFFERENT SPEEDS – NEW SCENARIO…

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APA (6^th Edition):

Mojir, K. Y. (2011). A Computational Model for Optimal Dimensional Speed on New High-Speed Lines. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37230

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mojir, Kayran Yousefi. “A Computational Model for Optimal Dimensional Speed on New High-Speed Lines.” 2011. Thesis, KTH. Accessed January 21, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37230.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mojir, Kayran Yousefi. “A Computational Model for Optimal Dimensional Speed on New High-Speed Lines.” 2011. Web. 21 Jan 2020.

Vancouver:

Mojir KY. A Computational Model for Optimal Dimensional Speed on New High-Speed Lines. [Internet] [Thesis]. KTH; 2011. [cited 2020 Jan 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37230.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mojir KY. A Computational Model for Optimal Dimensional Speed on New High-Speed Lines. [Thesis]. KTH; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37230

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Linköping University

23. Olofsson, Anders. Modern Stereo Correspondence Algorithms : Investigation and Evaluation.

Degree: Information Coding, 2010, Linköping University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57853

► Many different approaches have been taken towards solving the stereo correspondence problem and great progress has been made within the field during the last… (more)

Subjects/Keywords: stereo correspondence; stereo matching; cost function; cost aggregation; image segmentation; plane fitting; RANSAC; graph cuts; belief propagation; disparity; depth estimation; Computer Vision and Robotics (Autonomous Systems); Datorseende och robotik (autonoma system); Other Engineering and Technologies not elsewhere specified; Övrig annan teknik; Computational Mathematics; Beräkningsmatematik

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APA (6^th Edition):

Olofsson, A. (2010). Modern Stereo Correspondence Algorithms : Investigation and Evaluation. (Thesis). Linköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57853

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Olofsson, Anders. “Modern Stereo Correspondence Algorithms : Investigation and Evaluation.” 2010. Thesis, Linköping University. Accessed January 21, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57853.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Olofsson, Anders. “Modern Stereo Correspondence Algorithms : Investigation and Evaluation.” 2010. Web. 21 Jan 2020.

Vancouver:

Olofsson A. Modern Stereo Correspondence Algorithms : Investigation and Evaluation. [Internet] [Thesis]. Linköping University; 2010. [cited 2020 Jan 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57853.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Olofsson A. Modern Stereo Correspondence Algorithms : Investigation and Evaluation. [Thesis]. Linköping University; 2010. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57853

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

24. Γιώτης, Αλέξιος. Χρήση εξελικτικών τεχνικών, υπολογιστικής ευφυΐας και μεθόδων υπολογιστικής ρευστομηχανικής στη βελτιστοποίηση - αντίστροφη σχεδίαση πτερυγώσεων στροβιλομηχανών, μέσω παράλληλης επεξεργασίας.

Degree: 2003, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/16974

Subjects/Keywords: Αλγόριθμοι, Εξελικτικοί; Σχεδίαση πτερυγώσεων στροβιλομηχανών; Παράλληλη επεξεργασία; Βελτιστοποίηση; Δίκτυα, Νευρωνικά; Προβλήματα πολλαπλών στόχων; Μεταμοντέλα; Μείωση υπολογιστικού κόστους; Evolutionary algorithms; Turbomachinery cascade design; Parallel procesisng; Optimization; Networks, Neural; Multi-objective problems; Metamodels; Reduction of computational cost

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APA (6^th Edition):

Γιώτης, . �. (2003). Χρήση εξελικτικών τεχνικών, υπολογιστικής ευφυΐας και μεθόδων υπολογιστικής ρευστομηχανικής στη βελτιστοποίηση - αντίστροφη σχεδίαση πτερυγώσεων στροβιλομηχανών, μέσω παράλληλης επεξεργασίας. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/16974

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Γιώτης, Αλέξιος. “Χρήση εξελικτικών τεχνικών, υπολογιστικής ευφυΐας και μεθόδων υπολογιστικής ρευστομηχανικής στη βελτιστοποίηση - αντίστροφη σχεδίαση πτερυγώσεων στροβιλομηχανών, μέσω παράλληλης επεξεργασίας.” 2003. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed January 21, 2020. http://hdl.handle.net/10442/hedi/16974.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Γιώτης, Αλέξιος. “Χρήση εξελικτικών τεχνικών, υπολογιστικής ευφυΐας και μεθόδων υπολογιστικής ρευστομηχανικής στη βελτιστοποίηση - αντίστροφη σχεδίαση πτερυγώσεων στροβιλομηχανών, μέσω παράλληλης επεξεργασίας.” 2003. Web. 21 Jan 2020.

Vancouver:

Γιώτης �. Χρήση εξελικτικών τεχνικών, υπολογιστικής ευφυΐας και μεθόδων υπολογιστικής ρευστομηχανικής στη βελτιστοποίηση - αντίστροφη σχεδίαση πτερυγώσεων στροβιλομηχανών, μέσω παράλληλης επεξεργασίας. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2003. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/10442/hedi/16974.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Γιώτης �. Χρήση εξελικτικών τεχνικών, υπολογιστικής ευφυΐας και μεθόδων υπολογιστικής ρευστομηχανικής στη βελτιστοποίηση - αντίστροφη σχεδίαση πτερυγώσεων στροβιλομηχανών, μέσω παράλληλης επεξεργασίας. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2003. Available from: http://hdl.handle.net/10442/hedi/16974

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

25. Σιφαλέρας, Άγγελος. Ανάπτυξη και υλοποίηση αλγόριθμων εξωτερικών σημείων τύπου simplex για προβλήματα δικτυακής βελτιστοποίησης.

Degree: 2006, University of Macedonia Economic and Social Sciences; Πανεπιστήμιο Μακεδονίας Οικονομικών και Κοινωνικών Επιστημών

URL: http://hdl.handle.net/10442/hedi/14452

Subjects/Keywords: Δικτυακή βελτιστοποίηση; Αλγόριθμοι εξωτερικών σημείων τύπου simplex; Πρόβλημα ροής ελάχιστου κόστους; Υπολογιστικές μελέτες; Μαθηματικός προγραμματισμός; Σχεδίαση αλγορίθμων; Ανάλυση αλγορίθμων; Δομές δεδομένων; Εκπαιδευτικό λογισμικό; Network optimization; Exterior point simplex type algorithms; Minimum cost network flow problem; Computational studies; Mathematical programming; Algorithms design; Algorithms analysis; Data structures; Educational software

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Σιφαλέρας, . �. (2006). Ανάπτυξη και υλοποίηση αλγόριθμων εξωτερικών σημείων τύπου simplex για προβλήματα δικτυακής βελτιστοποίησης. (Thesis). University of Macedonia Economic and Social Sciences; Πανεπιστήμιο Μακεδονίας Οικονομικών και Κοινωνικών Επιστημών. Retrieved from http://hdl.handle.net/10442/hedi/14452

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Σιφαλέρας, Άγγελος. “Ανάπτυξη και υλοποίηση αλγόριθμων εξωτερικών σημείων τύπου simplex για προβλήματα δικτυακής βελτιστοποίησης.” 2006. Thesis, University of Macedonia Economic and Social Sciences; Πανεπιστήμιο Μακεδονίας Οικονομικών και Κοινωνικών Επιστημών. Accessed January 21, 2020. http://hdl.handle.net/10442/hedi/14452.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Σιφαλέρας, Άγγελος. “Ανάπτυξη και υλοποίηση αλγόριθμων εξωτερικών σημείων τύπου simplex για προβλήματα δικτυακής βελτιστοποίησης.” 2006. Web. 21 Jan 2020.

Vancouver:

Σιφαλέρας �. Ανάπτυξη και υλοποίηση αλγόριθμων εξωτερικών σημείων τύπου simplex για προβλήματα δικτυακής βελτιστοποίησης. [Internet] [Thesis]. University of Macedonia Economic and Social Sciences; Πανεπιστήμιο Μακεδονίας Οικονομικών και Κοινωνικών Επιστημών; 2006. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/10442/hedi/14452.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Σιφαλέρας �. Ανάπτυξη και υλοποίηση αλγόριθμων εξωτερικών σημείων τύπου simplex για προβλήματα δικτυακής βελτιστοποίησης. [Thesis]. University of Macedonia Economic and Social Sciences; Πανεπιστήμιο Μακεδονίας Οικονομικών και Κοινωνικών Επιστημών; 2006. Available from: http://hdl.handle.net/10442/hedi/14452

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Illinois – Urbana-Champaign

26. Nguyen, Tam H. System Reliability-Based Design and Multiresolution Topology Optimization.

Degree: PhD, 0106, 2011, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/18408

► Structural optimization methods have been developed and applied to a variety of engineering practices. This study aims to overcome technical challenges in applying design and… (more)

▼ Structural optimization methods have been developed and applied to a variety of engineering practices. This study aims to overcome technical challenges in applying design and topology optimization techniques to large-scale structural systems with uncertainties. The specific goals of this dissertation are: (1) to develop an efficient scheme for topology optimization; (2) to introduce an efficient and accurate system reliability-based design optimization (SRBDO) procedure; and (3) to investigate the reliability-based topology optimization (RBTO) problem. First, it is noted that the material distribution method often requires a large number of design variables, especially in three-dimensional applications, which makes topology optimization computationally expensive. A multiresolution topology optimization (MTOP) scheme is thus developed to obtain high-resolution optimal topologies with relatively low computational cost by introducing distinct resolution levels to displacement, density and design variable fields: the finite element analysis is performed on a relatively coarse mesh; the optimization is performed on a moderately fine mesh for design variables; and the density is defined on a relatively fine mesh for material distribution. Second, it is challenging to deal with system events in reliability-based design optimization (RBDO) due to the complexity of system reliability analysis. A new single-loop system RBDO approach is developed by using the matrix-based system reliability (MSR) method. The SRBDO/MSR approach utilizes matrix calculations to evaluate the system failure probability and its parameter sensitivities accurately and efficiently. The approach is applicable to general system events consisting of statistically dependent component events. Third, existing RBDO approaches employing first-order reliability method (FORM) can induce significant error for highly nonlinear problems. To enhance the accuracy of component and system RBDO approaches, algorithms based on the second-order reliability method (SORM), termed as SORM-based RBDO, are proposed. These technical advances enable us to perform RBTO of large-scale structures efficiently. The proposed algorithms and approaches are tested and demonstrated by various numerical examples. The efficient and accurate approaches developed for design and topology optimization can be applied to large-scale problems in engineering design practices. Advisors/Committee Members: Paulino, Glaucio H. (advisor), Song, Junho (advisor), Paulino, Glaucio H. (Committee Chair), Song, Junho (committee member), Hajjar, Jerome F. (committee member), Duarte, C. Armando (committee member), Penmetsa, Ravi C. (committee member), Sutradhar, Alok (committee member), Baker, William F. (committee member), Beghini, Alessandro (committee member).

Subjects/Keywords: topology optimization; design optimization; multiresolution; high resolution; reliability; finite element method; multiresolution topology optimization (MTOP); reliability-based design optimization (RBDO); reliability-based topology optimization (RBTO); first-order reliability method (FORM); second-order reliability method (SORM); component reliability-based topology optimization (CRBTO); component reliability-based design optimization (CRBDO); system reliability-based topology optimization (SRBTO); system reliability-based design optimization (SRBDO); reliability index approach (RIA); performance measure approach (PMA); Adaptive Mesh Refinement (AMR); matrix-based system reliability (MSR); reliability index approach; performance measure approach; component probability; system probability; single-loop; double-loop; first-order reliability method; second-order reliability method; density method; projection; density filter; reliability-based design optimization; reliability-based topology optimization; reliability index; optimal design; topology; risk; computational cost; uncertainty; design variable; density element; displacement element; Adaptive; efficient approach; large-scale; matrix-based

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nguyen, T. H. (2011). System Reliability-Based Design and Multiresolution Topology Optimization. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/18408

Chicago Manual of Style (16^th Edition):

Nguyen, Tam H. “System Reliability-Based Design and Multiresolution Topology Optimization.” 2011. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed January 21, 2020. http://hdl.handle.net/2142/18408.

MLA Handbook (7^th Edition):

Nguyen, Tam H. “System Reliability-Based Design and Multiresolution Topology Optimization.” 2011. Web. 21 Jan 2020.

Vancouver:

Nguyen TH. System Reliability-Based Design and Multiresolution Topology Optimization. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2011. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/2142/18408.

Council of Science Editors:

Nguyen TH. System Reliability-Based Design and Multiresolution Topology Optimization. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2011. Available from: http://hdl.handle.net/2142/18408

27. Tay, Noel Nuo Wi. Human-centric Semantic Reasoning and Optimization for Smart Home : スマートホームのための人間中心セマンティック推論と最適化.

Degree: 博士（工学）, 2017, Tokyo Metropolitan University / 首都大学東京

URL: http://hdl.handle.net/10748/00009960

首都大学東京, 2017-03-25, 博士（工学）

Subjects/Keywords: Smart home consists of various kinds of Internet of Tings (IoT) devices connected to the private house that cooperatively provide inhabitants (users) with proactive services related to comfort; security and safety. Examples of services include 1) manipulation of lighting and temperature based on time and context; 2) reminder service of user’s schedules by using the nearest output device; and 3) device organization to realize surveillance system. However; current smart homes are developed mostly from the viewpoint of technical capabilities; where users have to decide how the connected devices are going to serve them. They may have to setup the devices based on the available functionalities and specifications of the devices; and also have to alter their living styles according to the role of each device. Besides; most devices can only provide simple services independently. us; cooperation among the devices is important. On the other hand; human-centric approach; which centered on humans’ need to enhance their living experience; is an important technological paradigm where services are provided anywhere and anytime based on situation. Smart home abiding this approach should cooperatively maximize fulfillment of quality of life (QOL) for individual users subject to personal constraints. In this respect; the devices are bound to enable communication of information; and their operations are coordinated to deliver services cooperatively via a sequence of device actions called a plan. Due to personalization and automation; a number of problems have to be solved. First; a means of automatic binding between loosely coupled devices depending on services delivered have to be devised; as manual setup is impractical. Secondly; coordination of devices needs to generate complex plans; without requiring manual specification of sub-plans. Besides; issue of over-constrained goals during service provisions that arises from flawed or contradicting specification from multiple users should be considered. Apart from that; low training data in general environment setting for individual identification should be addressed. The aim of this research is to establish an integrated system for the human-centric smart home (HcSH) that provides personalized service through loosely coupled devices automatically. This research modularizes the overall system into three modules; which are human identification (HIM); automated planner (APM); and semantic reasoner (SRM). HIM helps select the appropriate QOL; SRM binds the devices by associating them with planning components; which are then used by APM to generate plans for device coordination to maximize QOL fulfillment. Chapter 1 gives the introduction and design motivation. Chapter 2 presents the related works and literature reviews; as well as justifications relevant to this thesis. Chapter 3 deals with HIM; which is realized via face identification. For face identification; problems faced are heavy computational load and insufficient learning data. The solution is to use transfer learning to handle data issue while being able to build generalized face model. For face model refinement; active learning is implemented. Experimental results show the method is competitive in terms of accuracy and computational cost compared to current state of the art. Chapter 4 presents APM; where planning via solving Constraint Satisfaction Problem (CSP) is laid out. CSP in planning is declarative without requiring prior specification of sub-plans; and can handle variables of larger domains. Due to the high possibility of having over-constrained QOL as in practical cases; CSP planner cannot fulfill all of them. An example is a contradicting TV channel request from 2 persons. Optimization through weighted CSP is therefore used to maximize QOL fulfillment. Experiments on weighted CSP shows that the method is capable of performing optimization while generating complex plans. Chapter 5 is on SRM; where knowledge representation is constructed by Web Ontology Language (OWL) description logic. It models knowledge on home and building layout and device functionalities. OWL is used because it is decidable and that it is endorsed by World Wide Web Consortium (W3C). We deal with case studies based on further inference on building state as an important example to discuss the applicability of the proposed method; and demonstrate the use of building ontology. This is followed by automated device binding and the method to generate basic planning components of rules in automated planning. Finally; an extension to robot complex planning is provided to demonstrate how it can be easily extended. Chapter 6 demonstrates the applicability of the HcSH; which integrates all three modules through its implementation in a prototype smart home with 5 rooms; which houses 2 persons. Various tests are performed to show the generated plans are near optimal without redundancy. e system is also shown to be scalable given increasing amount of devices. Case studies show that the system can perform well even under short time threshold. Finally; chapter 7 summarizes the thesis. Future vision of the work is also laid out; which is to implement it as a community-centric system.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tay, N. N. W. (2017). Human-centric Semantic Reasoning and Optimization for Smart Home : スマートホームのための人間中心セマンティック推論と最適化. (Thesis). Tokyo Metropolitan University / 首都大学東京. Retrieved from http://hdl.handle.net/10748/00009960

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tay, Noel Nuo Wi. “Human-centric Semantic Reasoning and Optimization for Smart Home : スマートホームのための人間中心セマンティック推論と最適化.” 2017. Thesis, Tokyo Metropolitan University / 首都大学東京. Accessed January 21, 2020. http://hdl.handle.net/10748/00009960.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tay, Noel Nuo Wi. “Human-centric Semantic Reasoning and Optimization for Smart Home : スマートホームのための人間中心セマンティック推論と最適化.” 2017. Web. 21 Jan 2020.

Vancouver:

Tay NNW. Human-centric Semantic Reasoning and Optimization for Smart Home : スマートホームのための人間中心セマンティック推論と最適化. [Internet] [Thesis]. Tokyo Metropolitan University / 首都大学東京; 2017. [cited 2020 Jan 21]. Available from: http://hdl.handle.net/10748/00009960.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tay NNW. Human-centric Semantic Reasoning and Optimization for Smart Home : スマートホームのための人間中心セマンティック推論と最適化. [Thesis]. Tokyo Metropolitan University / 首都大学東京; 2017. Available from: http://hdl.handle.net/10748/00009960

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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