subject:(Dynamic modeling)

University of Debrecen

1. Adejuwon, Adeyemi. Dynamic Systems Modeling .

Degree: DE – TEK – Informatikai Kar, 2012, University of Debrecen

In this work, a dynamic system was modeled using MATLAB. The trebuchet, a mediaval war artillery was modeled and it's properties such stability of the system, range and release angle were analyzed and presented using tables and charts. Advisors/Committee Members: Baran, Sándor (advisor).

Subjects/Keywords: Modeling; Dynamic Systems

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APA (6^th Edition):

Adejuwon, A. (2012). Dynamic Systems Modeling . (Thesis). University of Debrecen. Retrieved from http://hdl.handle.net/2437/129721

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):

Adejuwon, Adeyemi. “Dynamic Systems Modeling .” 2012. Thesis, University of Debrecen. Accessed March 08, 2021. http://hdl.handle.net/2437/129721.

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

MLA Handbook (7^th Edition):

Adejuwon, Adeyemi. “Dynamic Systems Modeling .” 2012. Web. 08 Mar 2021.

Vancouver:

Adejuwon A. Dynamic Systems Modeling . [Internet] [Thesis]. University of Debrecen; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2437/129721.

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

Council of Science Editors:

Adejuwon A. Dynamic Systems Modeling . [Thesis]. University of Debrecen; 2012. Available from: http://hdl.handle.net/2437/129721

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

Texas A&M University

2. Limpasurat, Akkharachai. Coupled Modeling of Dynamic Reservoir/Well Interactions under Liquid-loading Conditions.

Degree: PhD, Petroleum Engineering, 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151699

► Liquid loading in a gas well occurs when the upward gas flow rate is insufficient to lift the coproduced liquid to the surface, which results… (more)

▼ Liquid loading in a gas well occurs when the upward gas flow rate is insufficient to lift the coproduced liquid to the surface, which results in an accumulation of liquid at the bottom of the well. The liquid column in the tubing creates backpressure on the formation, which decreases the gas production rate and may stop the well from flowing. To model these phenomena, the dynamic interaction between the reservoir and the wellbore must be characterized. Due to wellbore phase re-distribution and potential phase-reinjection into the reservoir, the boundary conditions must be able to handle changing flow direction through the connections between the two subsystems. This study presents a new formulation of the wellbore boundary condition used in reservoir simulators. The boundary condition uses the new state variable, the multiphase zero flow pressure (MPZFP, p^(0)), to determine flow direction in the connection grid block. If the wellbore pressure is less than the p^(0), the connection is producing; otherwise, it is injecting. The volumetric proportion of the flow is always determined by the upstream side. The new reservoir simulator is used in coupled modeling associated with liquid loading phenomena. The metastable condition can be modeled in a simple manner without any limiting assumptions and numerical stability problems. We also applied this simulator for history matching of a gas well flowing with an intermittent production strategy. A basic transient wellbore model was developed for this purpose. The long-term tubinghead pressure (THP) history can be traced by our coupled simulation. Our modeling examples indicated that, the new wellbore boundary condition is suitable in modeling the dynamic interactions between reservoir and wellbore subsystems during liquid loading. The flow direction through the connection grid block can be automatically detected by our boundary condition without numerical difficulty during the course of the simulation. In addition, the capillary pressure can be accounted at the connection grid blocks when applying our new formulation in the reservoir simulator. Advisors/Committee Members: Valko, Peter P (advisor), Falcone, Gioia (advisor), Teodoriu, Catalin (committee member), Barrufet, Maria A (committee member).

Subjects/Keywords: liquid loading problems; dynamic modeling

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APA (6^th Edition):

Limpasurat, A. (2013). Coupled Modeling of Dynamic Reservoir/Well Interactions under Liquid-loading Conditions. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151699

Chicago Manual of Style (16^th Edition):

Limpasurat, Akkharachai. “Coupled Modeling of Dynamic Reservoir/Well Interactions under Liquid-loading Conditions.” 2013. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/151699.

MLA Handbook (7^th Edition):

Limpasurat, Akkharachai. “Coupled Modeling of Dynamic Reservoir/Well Interactions under Liquid-loading Conditions.” 2013. Web. 08 Mar 2021.

Vancouver:

Limpasurat A. Coupled Modeling of Dynamic Reservoir/Well Interactions under Liquid-loading Conditions. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/151699.

Council of Science Editors:

Limpasurat A. Coupled Modeling of Dynamic Reservoir/Well Interactions under Liquid-loading Conditions. [Doctoral Dissertation]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151699

University of New Mexico

3. Weldegiorgis, Mekdim. On Dynamic Modulus of Asphalt Concrete for Moisture Damage.

Degree: Civil Engineering, 2014, University of New Mexico

URL: http://hdl.handle.net/1928/24357

► Dynamic modulus (E*) test has gained substantial acceptance in recent years for evaluating Hot Mix Asphalt (HMA) rutting and fatigue cracking performances. Indeed, the recently… (more)

▼ Dynamic modulus (E*) test has gained substantial acceptance in recent years for evaluating Hot Mix Asphalt (HMA) rutting and fatigue cracking performances. Indeed, the recently developed Mechanistic Empirical Pavement Design Guide (MEPDG) uses E* data for stress and strain calculation, and E*-based models for prediction fatigue and rutting performances of a HMA pavement. Unfortunately, neither HMA mix design method nor the MEPDG uses E* value to evaluate moisture damage characteristics of HMA pavements. In fact, moisture damage is a very complex problem, and there exists no models for inclusion in the MEPDG for predicting moisture damage performance of HMA pavements. Rather, moisture damage performance of HMA is evaluated during the mix design state using the AASHTO T 283 test. According to AASHTO T 283 method, indirect tensile strength ratio of wet to dry samples is used as an indicator of moisture damage performance of a HMA mix. The AASHTO T 283 is a simple method, but it is not very reliable. In some cases, it gives false negative and positive values about the moisture damage characteristic of an HMA sample. To this end, this study attempts to study moisture damage in Asphalt Concrete (AC) sample by determining the loss in dynamic modulus (E*) value based on continuum damage mechanics. The loss in E* is evaluated by calculating the ratio of wet E* to dry E* (DMR). In this study, E* testing is performed on five different asphalt mixtures. Three of the asphalt mixtures are plant produced Superpave mixes, and the other two are laboratory prepared HMA mix. The plant produced mixes include SP-II mix with asphalt binders Performance Grade (PG) PG 64-22, SP-III mix with PG 70-22, and SP-IV mix with PG 70-22. The laboratory mixes are SP-III mix with PG 64-22, and SP-II with binder PG 70-22. The E* test is conducted at five temperatures (-10, 4, 21, 37, 54 °C) and six frequencies (25, 10, 5, 1, 0.5, 0.1 Hz). The resulting E* data are used to generate time-temperature mastercurves. Also, the laboratory E* data is fitted to several models such as the viscosity (\u03b7) -based Witczak model, the dynamic shear modulus (G*) -based Witczak models, and the Hirsch model. However, all models are found to underpredict the laboratory E* values. Therefore, the \u03b7-based Witczak model is modified to improve E* prediction accuracy in this study and E* ratios are used for evaluating moisture damage in AC. As mentioned above, the most common test method for evaluating moisture damage susceptibility of HMA mix is the AASHTO T 283. According to the AASHTO T 283, a dry asphalt concrete sample is vacuum saturated and then subjected to one cycle of freezing and thawing. However, one cycle of freeze-thaw does not simulate moisture condition resulting from repeated pore water pressure buildup and scouring cycles that occur when vehicle tires pass over a saturated pavement. Recently, Moisture Induced Sensitivity Tester (MIST) equipment can apply repeated pore pressure cycles inside an AC sample in the laboratory. Therefore, MIST… Advisors/Committee Members: Tarefder, Rafiqul, Tarefder, Rafiqul, Maji, Arup, Taha, Mahmoud, Khraishi, Tariq.

Subjects/Keywords: Dynamic; Modulus; Modeling; Moisture; Damage

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APA (6^th Edition):

Weldegiorgis, M. (2014). On Dynamic Modulus of Asphalt Concrete for Moisture Damage. (Doctoral Dissertation). University of New Mexico. Retrieved from http://hdl.handle.net/1928/24357

Chicago Manual of Style (16^th Edition):

Weldegiorgis, Mekdim. “On Dynamic Modulus of Asphalt Concrete for Moisture Damage.” 2014. Doctoral Dissertation, University of New Mexico. Accessed March 08, 2021. http://hdl.handle.net/1928/24357.

MLA Handbook (7^th Edition):

Weldegiorgis, Mekdim. “On Dynamic Modulus of Asphalt Concrete for Moisture Damage.” 2014. Web. 08 Mar 2021.

Vancouver:

Weldegiorgis M. On Dynamic Modulus of Asphalt Concrete for Moisture Damage. [Internet] [Doctoral dissertation]. University of New Mexico; 2014. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1928/24357.

Council of Science Editors:

Weldegiorgis M. On Dynamic Modulus of Asphalt Concrete for Moisture Damage. [Doctoral Dissertation]. University of New Mexico; 2014. Available from: http://hdl.handle.net/1928/24357

University of Hawaii – Manoa

4. Corrales, Jose. A Statistical Dynamic Modulus Model of Hot Mix Asphalt Using Joint Estimation and Mixed-Effects Accounting for Effects of Confinement, Moisture and Additives.

Degree: 2017, University of Hawaii – Manoa

URL: http://hdl.handle.net/10125/51591

►

Ph.D. University of Hawaii at Manoa 2016.

With the implementation of mechanistic-empirical pavement design methods, dynamic modulus (|E*|) has become the predominant characteristic of Hot… (more)

▼

Ph.D. University of Hawaii at Manoa 2016.

With the implementation of mechanistic-empirical pavement design methods, dynamic modulus (|E*|) has become the predominant characteristic of Hot Mix Asphalt (HMA) used as the elastic modulus in the computation of stresses and strains in pavement structures. The predictions of |E*| obtained with the Witczak models currently used in the Mechanistic Empirical Pavement Design Guide (MEPDG) do not account for some HMA characteristics such as polymer modified binders, fibers, confinement and aging effects related to climatic conditions. Therefore, development of models more representative of local materials and conditions are desirable. In this study, a predictive model for dynamic modulus of HMA was developed taking into consideration several HMA characteristics and testing conditions. 6821 observations of 257 mix specimens from three different laboratory datasets, two from Hawaii and one from Costa Rica, were used to estimate the model parameters. All three data sets contain information about some variables in common such as air voids, binder content, and gradation; however, some datasets contain mix characteristics and testing conditions not available in other datasets such as confinement level, available only in the Hawaiian datasets, and the number of freeze-thaw cycles, available only in the Costa Rican dataset. Important characteristics observed from these datasets include confinement, number of freeze-thaw cycles, binder modifiers (SBS polymers) and mixture additives (e.g. fibers and anti-stripping agents), all of which together with other commonly used variables were found to have statistically significant effects. The model was developed by using joint estimation and mixed-effects techniques. Joint estimation allowed the identification of model parameters available from only some of the databases and the determination of bias parameters. It also resulted in more efficient parameter estimates. The mixed-effects approach was used to account for unobserved heterogeneities between samples. Using these approaches, together with proper consideration of heteroscedasticity, allowed the estimation of a comprehensive statistical predictive model that satisfies closely all the regression assumptions and that provides accurate values of |E*| for Hawaiian and Costa Rican conditions for any combination of temperature and frequency. These can be used to generate the |E*| inputs that the MEPDG needs to compute |E*| master curves.

Subjects/Keywords: Asphalt Mixtures; Dynamic Modulus; Modeling

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APA (6^th Edition):

Corrales, J. (2017). A Statistical Dynamic Modulus Model of Hot Mix Asphalt Using Joint Estimation and Mixed-Effects Accounting for Effects of Confinement, Moisture and Additives. (Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/51591

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):

Corrales, Jose. “A Statistical Dynamic Modulus Model of Hot Mix Asphalt Using Joint Estimation and Mixed-Effects Accounting for Effects of Confinement, Moisture and Additives.” 2017. Thesis, University of Hawaii – Manoa. Accessed March 08, 2021. http://hdl.handle.net/10125/51591.

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

MLA Handbook (7^th Edition):

Corrales, Jose. “A Statistical Dynamic Modulus Model of Hot Mix Asphalt Using Joint Estimation and Mixed-Effects Accounting for Effects of Confinement, Moisture and Additives.” 2017. Web. 08 Mar 2021.

Vancouver:

Corrales J. A Statistical Dynamic Modulus Model of Hot Mix Asphalt Using Joint Estimation and Mixed-Effects Accounting for Effects of Confinement, Moisture and Additives. [Internet] [Thesis]. University of Hawaii – Manoa; 2017. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10125/51591.

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

Council of Science Editors:

Corrales J. A Statistical Dynamic Modulus Model of Hot Mix Asphalt Using Joint Estimation and Mixed-Effects Accounting for Effects of Confinement, Moisture and Additives. [Thesis]. University of Hawaii – Manoa; 2017. Available from: http://hdl.handle.net/10125/51591

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

5. Ma, Xiao. Modeling dynamic ruptures with high resolution fault zone physics.

Degree: PhD, Civil Engineering, 2019, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/106148

► Earthquakes are among the costliest natural hazards on earth. The dynamical instabilities responsible for the onset and propagation of these events are linked to fundamental… (more)

▼ Earthquakes are among the costliest natural hazards on earth. The dynamical instabilities responsible for the onset and propagation of these events are linked to fundamental physics, friction, fracture, heating, and compaction of fluid filled granular materials and rocks in the subsurface subjected to extreme geophysical conditions. Due to the wide range of spatial and temporal scales characteristic of the earthquake source processes, computational modeling of these processes continue to be a major challenge. In this research, we address this challenge by developing new models that shed novel insights into the different faces of complexity of the earthquake source. We first introduce the investigation of a complex fault zone structure and its effect on earthquake dynamic rupture mode transition. We show, for the first time, that the existence of soft inclusions off the fault plane may promote supershear transition under low prestress conditions. Secondly, we look further into the material behavior within the fault zone and develop a non-equilibrium statistical thermodynamics-based viscoplastic framework for modeling granular systems within the Shear Transformation Zone theory. Thirdly, we present a new hybrid computational algorithm for modeling earthquake ruptures in complex fault zone structures. This method has the potential capability to bridge the spatial and temporal scales in earthquake models by leveraging advantages of both domain based and boundary based numerical schemes. Finally, we demonstrate the powerful capability of the hybrid approach by applying the method to solve a computationally challenging problem in earthquake dynamic rupture modeling by explicitly representing small scale secondary fault branches. We then discuss the potential future research direction along the lines of previous studies such as applying the developed numerical frameworks for solving complicated fault zone problems that couldn’t be solved by traditional numerical schemes; extending the hybrid scheme to simulate long term earthquake cycles incorporating geometric complexity and material nonlinearity. This research work will expand our understanding of earthquake rupture and will help us gain new insights into the complexity of earthquake mechanisms. Advisors/Committee Members: Elbanna, Ahmed Ettaf (advisor), Elbanna, Ahmed Ettaf (Committee Chair), Espinosa Marzal, Rosa M. (committee member), Kammer, David S. (committee member), Duarte, C. Armando (committee member), Geubelle, Philippe H. (committee member).

Subjects/Keywords: Earthquake; Dynamic Rupture Modeling

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APA (6^th Edition):

Ma, X. (2019). Modeling dynamic ruptures with high resolution fault zone physics. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/106148

Chicago Manual of Style (16^th Edition):

Ma, Xiao. “Modeling dynamic ruptures with high resolution fault zone physics.” 2019. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed March 08, 2021. http://hdl.handle.net/2142/106148.

MLA Handbook (7^th Edition):

Ma, Xiao. “Modeling dynamic ruptures with high resolution fault zone physics.” 2019. Web. 08 Mar 2021.

Vancouver:

Ma X. Modeling dynamic ruptures with high resolution fault zone physics. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2142/106148.

Council of Science Editors:

Ma X. Modeling dynamic ruptures with high resolution fault zone physics. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2019. Available from: http://hdl.handle.net/2142/106148

Louisiana State University

6. Blears, John Rayner. Coupled Pore-to-Continuum Multiscale Modeling of Dynamic Particle Filtration Processes in Porous Media.

Degree: PhD, 2019, Louisiana State University

URL: https://digitalcommons.lsu.edu/gradschool_dissertations/5098

► Modeling particle transport and retention in porous media is important in fields such as hydrocarbon extraction, groundwater filtration, and membrane separation. While the continuum-scale… (more)

Subjects/Keywords: Filtration; Coupled; Modeling; Dynamic; Particle

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APA (6^th Edition):

Blears, J. R. (2019). Coupled Pore-to-Continuum Multiscale Modeling of Dynamic Particle Filtration Processes in Porous Media. (Doctoral Dissertation). Louisiana State University. Retrieved from https://digitalcommons.lsu.edu/gradschool_dissertations/5098

Chicago Manual of Style (16^th Edition):

Blears, John Rayner. “Coupled Pore-to-Continuum Multiscale Modeling of Dynamic Particle Filtration Processes in Porous Media.” 2019. Doctoral Dissertation, Louisiana State University. Accessed March 08, 2021. https://digitalcommons.lsu.edu/gradschool_dissertations/5098.

MLA Handbook (7^th Edition):

Blears, John Rayner. “Coupled Pore-to-Continuum Multiscale Modeling of Dynamic Particle Filtration Processes in Porous Media.” 2019. Web. 08 Mar 2021.

Vancouver:

Blears JR. Coupled Pore-to-Continuum Multiscale Modeling of Dynamic Particle Filtration Processes in Porous Media. [Internet] [Doctoral dissertation]. Louisiana State University; 2019. [cited 2021 Mar 08]. Available from: https://digitalcommons.lsu.edu/gradschool_dissertations/5098.

Council of Science Editors:

Blears JR. Coupled Pore-to-Continuum Multiscale Modeling of Dynamic Particle Filtration Processes in Porous Media. [Doctoral Dissertation]. Louisiana State University; 2019. Available from: https://digitalcommons.lsu.edu/gradschool_dissertations/5098

Rochester Institute of Technology

7. Clark, K Jeselle. Simulating Pathway-Based Steady States to Prevent Epithelial- Mesenchymal Transition in Ovarian Cancer.

Degree: MS, Thomas H. Gosnell School of Life Sciences (COS), 2019, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/10000

► Ovarian cancer is a complex disease that involves gene regulatory dysfunction and that requires a systemic viewpoint to fully understand. Applying executable biology to… (more)

Subjects/Keywords: Cancer; Discrete; Dynamic; Modeling; Ovarian; Pathways

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APA (6^th Edition):

Clark, K. J. (2019). Simulating Pathway-Based Steady States to Prevent Epithelial- Mesenchymal Transition in Ovarian Cancer. (Masters Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/10000

Chicago Manual of Style (16^th Edition):

Clark, K Jeselle. “Simulating Pathway-Based Steady States to Prevent Epithelial- Mesenchymal Transition in Ovarian Cancer.” 2019. Masters Thesis, Rochester Institute of Technology. Accessed March 08, 2021. https://scholarworks.rit.edu/theses/10000.

MLA Handbook (7^th Edition):

Clark, K Jeselle. “Simulating Pathway-Based Steady States to Prevent Epithelial- Mesenchymal Transition in Ovarian Cancer.” 2019. Web. 08 Mar 2021.

Vancouver:

Clark KJ. Simulating Pathway-Based Steady States to Prevent Epithelial- Mesenchymal Transition in Ovarian Cancer. [Internet] [Masters thesis]. Rochester Institute of Technology; 2019. [cited 2021 Mar 08]. Available from: https://scholarworks.rit.edu/theses/10000.

Council of Science Editors:

Clark KJ. Simulating Pathway-Based Steady States to Prevent Epithelial- Mesenchymal Transition in Ovarian Cancer. [Masters Thesis]. Rochester Institute of Technology; 2019. Available from: https://scholarworks.rit.edu/theses/10000

Texas A&M University

8. Liang, Shuangshuang. Dynamic Modeling and Wavelet-Based Multi-Parametric Tuning and Validation for HVAC Systems.

Degree: PhD, Mechanical Engineering, 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153322

► Dynamic Heating, Ventilation, and Air-Conditioning (HVAC) system models are used for the purpose of control design, fault detection and diagnosis, system analysis, design and optimization.… (more)

▼ Dynamic Heating, Ventilation, and Air-Conditioning (HVAC) system models are used for the purpose of control design, fault detection and diagnosis, system analysis, design and optimization. Therefore, ensuring the accuracy and reliability of the dynamic models is important before their application. Parameter tuning and model validation is a crucial way to improve the accuracy and reliability of the dynamic models. Traditional parameter tuning and validation methods are generally time-consuming, inaccurate and can only handle a limited number of tuning parameters. This is especially true for multiple-input-multiple-output (MIMO) models due to their intrinsic complexity. This dissertation proposes a new automatic parameter tuning and validation approach to address this problem. In this approach, a fast and accurate model is derived using linearization. Discrete-time convolution is then applied on this linearized model to generate the model outputs. These outputs and data are then processed through wavelet decomposition, and the corresponding wavelet coefficients obtained from it are used to establish the objective function. Wavelets are advantageous in capturing the dynamic information hidden in the time series. The objective function is then optimized iteratively using a hybrid method consisting of a global search genetic algorithm (GA) and a local gradient search method. In order to prove the feasibility and robustness of the proposed approach, it is applied on different dynamic models. These models include an HVAC system model with moving boundary (MB) heat exchanger models, a heat pump model with finite control volume (FCV) heat exchanger models, and a lumped parameter residential conditioned space model. These models generally have a large number of parameters which need tuning. The proposed method is proved to be efficient in tuning single data set, and can also tune the models using multiple experimental or field data sets with different operating conditions. The tuned parameters are further cross-validated using other data sets with different operating conditions. The results also indicate the proposed method can effectively tune the model using both static and transient data simultaneously. Advisors/Committee Members: Rasmussen, Bryan (advisor), Haberl, Jeff (committee member), McAdams, Daniel (committee member), Pate, Michael (committee member).

Subjects/Keywords: Parameter tuning; HVAC; Dynamic Modeling; Validation

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APA (6^th Edition):

Liang, S. (2014). Dynamic Modeling and Wavelet-Based Multi-Parametric Tuning and Validation for HVAC Systems. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153322

Chicago Manual of Style (16^th Edition):

Liang, Shuangshuang. “Dynamic Modeling and Wavelet-Based Multi-Parametric Tuning and Validation for HVAC Systems.” 2014. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/153322.

MLA Handbook (7^th Edition):

Liang, Shuangshuang. “Dynamic Modeling and Wavelet-Based Multi-Parametric Tuning and Validation for HVAC Systems.” 2014. Web. 08 Mar 2021.

Vancouver:

Liang S. Dynamic Modeling and Wavelet-Based Multi-Parametric Tuning and Validation for HVAC Systems. [Internet] [Doctoral dissertation]. Texas A&M University; 2014. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/153322.

Council of Science Editors:

Liang S. Dynamic Modeling and Wavelet-Based Multi-Parametric Tuning and Validation for HVAC Systems. [Doctoral Dissertation]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153322

Texas A&M University

9. Gupta, Ankush 1986-. Dynamic Modeling and Cascaded Control for a Multi-Evaporator Supermarket Refrigeration System.

Degree: MS, Mechanical Engineering, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/148111

► The survey from US Department of Energy showed that about one-third of energy consumption in US is due to air conditioning and refrigeration systems. This… (more)

▼ The survey from US Department of Energy showed that about one-third of energy consumption in US is due to air conditioning and refrigeration systems. This significant usage of electricity in the HVAC industry has prompted researchers to develop dynamic models for the HVAC components, which leads to implementation of better control and optimization techniques. In this research, efforts are made to model a multi-evaporator system. A novel dynamic modeling technique is proposed based on moving boundary method, which can be generalized for any number of evaporators in a vapor compression cycle. The models were validated experimentally on a commercial supermarket refrigeration unit. Simulation results showed that the models capture the major dynamics of the system in both the steady state and transient external disturbances. Furthermore the use of MEMS (microelectromechanical) based Silicon Expansion Valves (SEVs) have reportedly shown power savings as compared to the Thermal Expansion Valves (TEVs). Experimental tests were conducted on a supermarket refrigeration unit fitted with the MEMS valves to explain the cause of these potential energy savings. In this study an advanced cascaded control algorithm was also designed to control the MEMS valves. The performance of the cascaded control architecture was compared with the standard Thermal Expansion Valves (TEVs) and a commercially available Microstaq (MS) Superheat Controller (SHC). The results reveal that the significant efficiency gains derived on the SEVs are due to better superheat regulation, tighter superheat control and superior cooling effects in shorter time period which reduces the total run-time of the compressor. It was also observed that the duty cycle was least for the cascaded control algorithm. The reduction in duty cycle indicates early shut-off for the compressor resulting in maximum power savings for the cascaded control, followed by the Microstaq controller and then the Thermal Expansion Valves. Advisors/Committee Members: Rasmussen, Bryan (advisor), Pate, Michael (committee member), Haberl, Jeff (committee member).

Subjects/Keywords: Cascaded Control; Silicon Expansion Valve; Dynamic Modeling

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APA (6^th Edition):

Gupta, A. 1. (2012). Dynamic Modeling and Cascaded Control for a Multi-Evaporator Supermarket Refrigeration System. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/148111

Chicago Manual of Style (16^th Edition):

Gupta, Ankush 1986-. “Dynamic Modeling and Cascaded Control for a Multi-Evaporator Supermarket Refrigeration System.” 2012. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/148111.

MLA Handbook (7^th Edition):

Gupta, Ankush 1986-. “Dynamic Modeling and Cascaded Control for a Multi-Evaporator Supermarket Refrigeration System.” 2012. Web. 08 Mar 2021.

Vancouver:

Gupta A1. Dynamic Modeling and Cascaded Control for a Multi-Evaporator Supermarket Refrigeration System. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/148111.

Council of Science Editors:

Gupta A1. Dynamic Modeling and Cascaded Control for a Multi-Evaporator Supermarket Refrigeration System. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/148111

Penn State University

10. Bowen, Landen Albert. A Dynamic Modeling Approach and Optimization Framework for the Design of Self-folding Origami Structures.

Degree: 2016, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/m900nt40f

► Origami has been of recent interest to the engineering community due to its simple assembly process (folding), the capacity to create an infinite number of… (more)

▼ Origami has been of recent interest to the engineering community due to its simple assembly process (folding), the capacity to create an infinite number of shapes from a single sheet, and the ability to fold compactly yet deploy into a larger state at a later time. Of particular interest in the field of origami engineering is self-folding, in which an origami-inspired design is capable of folding (and unfolding) into a specified target shape using one or more active materials. While several modeling methods have been utilized previously to simulate origami-inspired designs, none have the capacity to quickly simulate an entire self-folding model. In this work, a dynamic model of self-folding origami structures is developed to enable a simulation-based approach to the design of these novel structures. In the dynamic model, the flat panels in an origami structure are modeled as rigid links and the creases as joints with torsional stiffness and damping. These approximations are qualitatively validated through the modeling and investigation of a bistable origami waterbomb base and a deployable optical shield planned for use in a future NASA mission. In both cases, the dynamic model allows for investigation of the kinematics as well as the forces developed in the joints, yielding interesting new insights into both designs. These insights include a quantitative exploration of how the energy stored in the waterbomb as it is displaced from its stable equilibrium position leads to its bistable nature and a distinct, oscillatory pattern found in both the deployment motion and joint forces of the deployable optical shield. To enable the dynamic simulation of self-folding, approximations of two active materials used previously for self-folding, namely, magneto-active elastomer (MAE) and electroactive polymer (EAP), are developed for use in the dynamic model. Each approximation is validated through the comparison of a self-folding experiment with a corresponding dynamic model, resulting in good correlation between simulated and experimental results. A multi-field structure that uses both active materials is then designed, and, upon fabrication and experimentation, is found to correlate well with simulated results. With the self-folding model validated, it can be used in the design of new self-folding structures. In order to better determine active material placement and minimize the amount of material required for a given design, the dynamic model is integrated with a trade space exploration software: the ARL Trade Space Visualizer. Using this software, the entire trade space of a self-folding structure can be readily explored, and the optimal designs determined. This process is utilized to optimize magneto-active material orientations and placements for two different origami structures. This same process can also be used to determine EAP amounts and placements. Finally, a generalized optimization framework for the design of self-folding origami structures is presented that incorporates many of the concepts developed in this work… Advisors/Committee Members: Mary I Frecker, Dissertation Advisor/Co-Advisor, Timothy William Simpson, Committee Chair/Co-Chair, Paris R Vonlockette, Committee Member, Zoubeida Ounaies, Committee Member, Namiko Yamamoto, Outside Member.

Subjects/Keywords: origami; compliant mechanisms; dynamic modeling; self-folding

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APA (6^th Edition):

Bowen, L. A. (2016). A Dynamic Modeling Approach and Optimization Framework for the Design of Self-folding Origami Structures. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/m900nt40f

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):

Bowen, Landen Albert. “A Dynamic Modeling Approach and Optimization Framework for the Design of Self-folding Origami Structures.” 2016. Thesis, Penn State University. Accessed March 08, 2021. https://submit-etda.libraries.psu.edu/catalog/m900nt40f.

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

MLA Handbook (7^th Edition):

Bowen, Landen Albert. “A Dynamic Modeling Approach and Optimization Framework for the Design of Self-folding Origami Structures.” 2016. Web. 08 Mar 2021.

Vancouver:

Bowen LA. A Dynamic Modeling Approach and Optimization Framework for the Design of Self-folding Origami Structures. [Internet] [Thesis]. Penn State University; 2016. [cited 2021 Mar 08]. Available from: https://submit-etda.libraries.psu.edu/catalog/m900nt40f.

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

Council of Science Editors:

Bowen LA. A Dynamic Modeling Approach and Optimization Framework for the Design of Self-folding Origami Structures. [Thesis]. Penn State University; 2016. Available from: https://submit-etda.libraries.psu.edu/catalog/m900nt40f

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

Delft University of Technology

11. Abuter Grebe, Nicolás Omar (author). Differential Dynamic Programming for Aerial Robots using an Aerodynamics Model.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:edbb8630-d1ad-4230-b4cd-f593e81622b2

► State of the art trajectory generation schemes for quadrotors assume a simple dynamic model. They neglect aerodynamic effects such as induced drag and blade flapping… (more)

Subjects/Keywords: Differential Dynamic Programming; quadcopter; quadrotor; Controller; Modeling

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APA (6^th Edition):

Abuter Grebe, N. O. (. (2017). Differential Dynamic Programming for Aerial Robots using an Aerodynamics Model. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:edbb8630-d1ad-4230-b4cd-f593e81622b2

Chicago Manual of Style (16^th Edition):

Abuter Grebe, Nicolás Omar (author). “Differential Dynamic Programming for Aerial Robots using an Aerodynamics Model.” 2017. Masters Thesis, Delft University of Technology. Accessed March 08, 2021. http://resolver.tudelft.nl/uuid:edbb8630-d1ad-4230-b4cd-f593e81622b2.

MLA Handbook (7^th Edition):

Abuter Grebe, Nicolás Omar (author). “Differential Dynamic Programming for Aerial Robots using an Aerodynamics Model.” 2017. Web. 08 Mar 2021.

Vancouver:

Abuter Grebe NO(. Differential Dynamic Programming for Aerial Robots using an Aerodynamics Model. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Mar 08]. Available from: http://resolver.tudelft.nl/uuid:edbb8630-d1ad-4230-b4cd-f593e81622b2.

Council of Science Editors:

Abuter Grebe NO(. Differential Dynamic Programming for Aerial Robots using an Aerodynamics Model. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:edbb8630-d1ad-4230-b4cd-f593e81622b2

University of Illinois – Urbana-Champaign

12. Kawamura, Malia L. Dynamic modeling and hardware in the loop testing of chemical processes.

Degree: MS, Mechanical Engineering, 2017, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/97451

► This thesis presents a framework for hardware-in-the-loop (HIL) testing of chemical plants. HIL testing is a widespread tool used in industry and academia to bridge… (more)

Subjects/Keywords: Hardware-in-the-loop; Dynamic modeling; Controls

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APA (6^th Edition):

Kawamura, M. L. (2017). Dynamic modeling and hardware in the loop testing of chemical processes. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/97451

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):

Kawamura, Malia L. “Dynamic modeling and hardware in the loop testing of chemical processes.” 2017. Thesis, University of Illinois – Urbana-Champaign. Accessed March 08, 2021. http://hdl.handle.net/2142/97451.

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

MLA Handbook (7^th Edition):

Kawamura, Malia L. “Dynamic modeling and hardware in the loop testing of chemical processes.” 2017. Web. 08 Mar 2021.

Vancouver:

Kawamura ML. Dynamic modeling and hardware in the loop testing of chemical processes. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2142/97451.

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

Council of Science Editors:

Kawamura ML. Dynamic modeling and hardware in the loop testing of chemical processes. [Thesis]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/97451

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

University of Hawaii – Manoa

13. Wolfe, Michael Alan. Design and control methods for a conjoined automotive regenerative braking dynamic system.

Degree: 2016, University of Hawaii – Manoa

URL: http://hdl.handle.net/10125/101758

►

M.S. University of Hawaii at Manoa 2010.

Along with the diminishing supplies of fossil fuels, the continually increasing price of oil, and the deterioration of… (more)

▼

M.S. University of Hawaii at Manoa 2010.

Along with the diminishing supplies of fossil fuels, the continually increasing price of oil, and the deterioration of the environment as an effect of fossil fueled vehicles, the world now focuses its attention on green energy and vehicle hybridization. This has given rise to many alternatives in internal combustion engine vehicle hybridization such as the parallel and series hybrids, as well as plug-in hybrid electric vehicles. This paper proposes a new method of hybridization which allows ICE vehicles to be retrofitted to take advantage of regenerative braking and acceleration assistance. The conjoined automotive regenerative braking system is a small trailer like device that can be attached via trailer hitch to the ICE vehicle in order to create a pseudo parallel hybrid. The CARB will be connected to the trailer hitch of the ICE vehicle through a series elastic element in order to filter impulse shock loads as well as provide stability and robustness in force control. This thesis explains the dynamic modeling of the system as well as the response of the system to varying control schemes. Firstly, the system was analyzed analytically as a Series Elastic Actuator. The system model is very simple and a PD force controller is implemented to regulate the force in the spring connecting the CARB and the Vehicle. The closed loop transfer function is determined and the step response of the system was analyzed to determine that the closed loop natural frequency of the system needed to be above 100Hz in order for the transients in the response to die out within half of a second. Secondly, a simulink model of the system was created. A linear damper is added in parallel with the series elastic element between the vehicle and the CARB. The system input is a feed forward desired force for the vehicle determined from the Federal Urban Driving Schedule and the mass of the vehicle. A proportion of this feed forward desired force of the car is used as the desired force from the CARB. A PID controller regulates the torque of the CARB to minimize the force error between the desired force and the load force. The control parameters for this load force control scheme are determined using the signal constraint block in simulink and are determined for a variety of linear spring constants and linear damping constants. The velocity error of the system velocity response versus FUDS is less than 0.3 m/s for any simulation, and the load force error was limited to less than 150 N. The power used by the vehicle was shown to be significantly lessened by the addition of the CARB. Thirdly a more detailed Simulink model was created using the Simscape toolbox which allowed for highly detailed simulated physical entities, such as drivelines, inertias, electronics, etc. This system uses a battery model and DC/DC converter which is connected to a 50kW PMSM to simulate the electronics of the CARB, The longitudinal and tire dynamics of the car and of the system are accounted for. A model of an ICE was used to…

Subjects/Keywords: Dynamic System Modeling; Simulink; PID Control

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APA (6^th Edition):

Wolfe, M. A. (2016). Design and control methods for a conjoined automotive regenerative braking dynamic system. (Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/101758

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):

Wolfe, Michael Alan. “Design and control methods for a conjoined automotive regenerative braking dynamic system.” 2016. Thesis, University of Hawaii – Manoa. Accessed March 08, 2021. http://hdl.handle.net/10125/101758.

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

MLA Handbook (7^th Edition):

Wolfe, Michael Alan. “Design and control methods for a conjoined automotive regenerative braking dynamic system.” 2016. Web. 08 Mar 2021.

Vancouver:

Wolfe MA. Design and control methods for a conjoined automotive regenerative braking dynamic system. [Internet] [Thesis]. University of Hawaii – Manoa; 2016. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10125/101758.

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

Council of Science Editors:

Wolfe MA. Design and control methods for a conjoined automotive regenerative braking dynamic system. [Thesis]. University of Hawaii – Manoa; 2016. Available from: http://hdl.handle.net/10125/101758

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

14. Barlukova, Ayuna. Dynamic instability of microtubules and effect of microtubule targeting agents : Theoretical modelisation of tumour development on dorsal skinfold chamber : towards a clinical tool to individualize and optimize therapies.

Degree: Docteur es, Mathématiques, 2017, Aix Marseille Université

URL: http://www.theses.fr/2017AIXM0064

►

L'objectif de cette thèse est de proposer des modèles mathématiques permettant de décrire l'instabilité dynamique d'une population de microtubules (MTs) et l'effet de médicaments sur… (more)

▼

L'objectif de cette thèse est de proposer des modèles mathématiques permettant de décrire l'instabilité dynamique d'une population de microtubules (MTs) et l'effet de médicaments sur cette instabilité. L'instabilité dynamique des MTs joue un rôle extrêmement important dans les processus de la mitose et de la migration cellulaire et donc dans la progression tumorale. L'instabilité dynamique est un processus complexe qui implique différents états de la tubuline (polymérisée ou non-polymérisée, tubuline-GTP ou tubuline-GDP qui correspondent à deux états énergétiques différents des dimères) et qui résulte de processus chimiques (polymérisation, dépolymérisation, hydrolyse, recyclage, nucléation) liant ces différents états de la tubuline. Décrire cette complexité par le biais de modèles mathématiques permet alors de tester des hypothèses biologiques quant à l'impact de chacun de ces processus et l'action de molécules anti-MTs. De récents travaux suggèrent que le "vieillissement" des MTs impacte leur dynamique. Nous avons testé dans ce travail l'hypothèse que ce "vieillissement" accélère l'hydrolyse du GTP au sein de la tubuline. Nous avons construit de nouveaux modèles couplant deux équations de transport multi-D avec deux équations différentielles ordinaires impliquant des termes intégraux. Nous avons calibrer notre nouveau modèle à partir des données expérimentales; tester l'hypothèse biologique sur le mécanisme du processus de vieillissement; analyser la sensibilité du modèle par rapport aux paramètres décrivant les processus; tester différentes hypothèses quant l'effet des médicaments anti-MTs.

The aim of this thesis is to design new mathematical models that are able to appropriately describe dynamic instability of a population of microtubules (MTs) and effect of drugs on MT dynamics. MT dynamic instability play an important role in the processes of mitosis and cell migration and, thus, in cancer progression. Dynamic instability is a complex process that involves different states of tubulin (polymerized or non-polymerized, GTP-tubulin or GDPtubulin that correspond to two different energetic states of tubulin dimers) that resulted from chemical processes (polymerization, depolymerization, hydrolysis, recycling, nucleation) linking these different states of tubulin. Description of this complexity by mathematical models enables one to test biological hypotheses concerning the impact of each process and action of drugs on microtubule dynamics. Recent observations show that MT dynamics depends on aging of MT. One of the aims of the work is to test the hypothesis that MT aging results from the acceleration of the GTP hydrolysis. We construct for that new models that couple two multidimensional transport equations with two ordinary differential equations involving integral terms. We have calibrated our models on the basis of experimental data; tested biological hypothesis on mechanism of aging process; performed a sensitivity analysis of the model with respect to parameters describing chemical processes; and tested…

Advisors/Committee Members: Hubert, Florence (thesis director), Honoré, Stéphane (thesis director).

Subjects/Keywords: .; Microtubule; Dynamic instabilty; Modeling; Paclitaxel; 510

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APA (6^th Edition):

Barlukova, A. (2017). Dynamic instability of microtubules and effect of microtubule targeting agents : Theoretical modelisation of tumour development on dorsal skinfold chamber : towards a clinical tool to individualize and optimize therapies. (Doctoral Dissertation). Aix Marseille Université. Retrieved from http://www.theses.fr/2017AIXM0064

Chicago Manual of Style (16^th Edition):

Barlukova, Ayuna. “Dynamic instability of microtubules and effect of microtubule targeting agents : Theoretical modelisation of tumour development on dorsal skinfold chamber : towards a clinical tool to individualize and optimize therapies.” 2017. Doctoral Dissertation, Aix Marseille Université. Accessed March 08, 2021. http://www.theses.fr/2017AIXM0064.

MLA Handbook (7^th Edition):

Barlukova, Ayuna. “Dynamic instability of microtubules and effect of microtubule targeting agents : Theoretical modelisation of tumour development on dorsal skinfold chamber : towards a clinical tool to individualize and optimize therapies.” 2017. Web. 08 Mar 2021.

Vancouver:

Barlukova A. Dynamic instability of microtubules and effect of microtubule targeting agents : Theoretical modelisation of tumour development on dorsal skinfold chamber : towards a clinical tool to individualize and optimize therapies. [Internet] [Doctoral dissertation]. Aix Marseille Université 2017. [cited 2021 Mar 08]. Available from: http://www.theses.fr/2017AIXM0064.

Council of Science Editors:

Barlukova A. Dynamic instability of microtubules and effect of microtubule targeting agents : Theoretical modelisation of tumour development on dorsal skinfold chamber : towards a clinical tool to individualize and optimize therapies. [Doctoral Dissertation]. Aix Marseille Université 2017. Available from: http://www.theses.fr/2017AIXM0064

Virginia Tech

15. Matrangola, Sara Louise. An experimental and simulation based approach toward understanding the effects of obesity on balance recovery from a postural perturbation.

Degree: PhD, Biomedical Engineering, 2011, Virginia Tech

URL: http://hdl.handle.net/10919/39388

► Obesity is associated with an increased risk of falls and subsequent injury. Most falls result from some type of postural perturbation. As such, it is… (more)

▼ Obesity is associated with an increased risk of falls and subsequent injury. Most falls result from some type of postural perturbation. As such, it is important to understand how obesity influences balance recovery from a postural perturbation. There is limited information on the effects of obesity on balance recovery, and the limited available information is ambiguous. Therefore, the purpose of the research within this dissertation was to investigate the effects of obesity on balance recovery after a postural perturbation in young adults to better understand how obesity contributes to fall risk. Four separate studies make up this dissertation. The purpose of the first study was to investigate the effects of obesity on balance recovery ability using an ankle strategy in young adults. Normal-weight and obese participants recovered balance using an ankle strategy after three types of postural perturbations: an initial angular displacement, an initial angular velocity from the natural stance, and an initial angular velocity from a prescribed position. Obese participants were unable to recover balance using an ankle strategy as well as normal-weight participants when perturbations involved an initial angular velocity. However, no differences between obese and normal-weight participants were found when perturbations only involved an initial angular displacement. The effect of obesity on balance recovery in young adults was dependent on the perturbation characteristics, and may be explained by a possible beneficial effect of increased inertia on balance recovery after perturbations with little or no initial angular velocity. The purpose of the second study was to examine the effects of obesity on balance recovery by stepping in young adults. The ankle strategy has the benefit of simplifying the mechanics of balance recovery, but limits generalizability to more realistic fall scenarios where stepping to extend the base of support and recover balance is desired. Similar to the first study, participants attempted to recover balance following two types of postural perturbations: an initial angular displacement from an upright stance (by releasing participants from a static forward lean), and an initial angular velocity while in an upright stance (using a translating platform). In contrast to the first study, the ability to recover balance with a single-step did not differ between young normal-weight and obese adults. These results suggest that the reported increase in fall risk in obese adults is not a result of impaired balance recovery ability (at least among young adults that were tested here). The third study examined the effects of obesity on body kinematics immediately following a trip-like perturbation in young adults. Obesity was found to increase body angular velocity the perturbation, and that increases in body angular velocity were associated with an increased probability of a failed recovery. These results suggest that when a young obese and young normal-weight individual trip while walking… Advisors/Committee Members: Madigan, Michael L. (committeechair), Nussbaum, Maury A. (committee member), Davy, Kevin P. (committee member), Davidson, Bradley S. (committee member), Marsh, Anthony P. (committee member).

Subjects/Keywords: falls; balance recovery; obesity; forward dynamic modeling

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APA (6^th Edition):

Matrangola, S. L. (2011). An experimental and simulation based approach toward understanding the effects of obesity on balance recovery from a postural perturbation. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/39388

Chicago Manual of Style (16^th Edition):

Matrangola, Sara Louise. “An experimental and simulation based approach toward understanding the effects of obesity on balance recovery from a postural perturbation.” 2011. Doctoral Dissertation, Virginia Tech. Accessed March 08, 2021. http://hdl.handle.net/10919/39388.

MLA Handbook (7^th Edition):

Matrangola, Sara Louise. “An experimental and simulation based approach toward understanding the effects of obesity on balance recovery from a postural perturbation.” 2011. Web. 08 Mar 2021.

Vancouver:

Matrangola SL. An experimental and simulation based approach toward understanding the effects of obesity on balance recovery from a postural perturbation. [Internet] [Doctoral dissertation]. Virginia Tech; 2011. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10919/39388.

Council of Science Editors:

Matrangola SL. An experimental and simulation based approach toward understanding the effects of obesity on balance recovery from a postural perturbation. [Doctoral Dissertation]. Virginia Tech; 2011. Available from: http://hdl.handle.net/10919/39388

Virginia Tech

16. Zaghlool, Shaza B. Dynamic Causal Modeling Across Network Topologies.

Degree: PhD, Computer Engineering, 2014, Virginia Tech

URL: http://hdl.handle.net/10919/46874

► Dynamic Causal Modeling (DCM) uses dynamical systems to represent the high-level neural processing strategy for a given cognitive task. The logical network topology of the… (more)

▼ Dynamic Causal Modeling (DCM) uses dynamical systems to represent the high-level neural processing strategy for a given cognitive task. The logical network topology of the model is specified by a combination of prior knowledge and statistical analysis of the neuro-imaging signals. Parameters of this a-priori model are then estimated and competing models are compared to determine the most likely model given experimental data. Inter-subject analysis using DCM is complicated by differences in model topology, which can vary across subjects due to errors in the first-level statistical analysis of fMRI data or variations in cognitive processing. This requires considerable judgment on the part of the experimenter to decide on the validity of assumptions used in the modeling and statistical analysis; in particular, the dropping of subjects with insufficient activity in a region of the model and ignoring activation not included in the model. This manual data filtering is required so that the fMRI model's network size is consistent across subjects. This thesis proposes a solution to this problem by treating missing regions in the first-level analysis as missing data, and performing estimation of the time course associated with any missing region using one of four candidate methods: zero-filling, average-filling, noise-filling using a fixed stochastic process, or one estimated using expectation-maximization. The effect of this estimation scheme was analyzed by treating it as a preprocessing step to DCM and observing the resulting effects on model evidence. Simulation studies show that estimation using expectation-maximization yields the highest classification accuracy using a simple loss function and highest model evidence, relative to other methods. This result held for various data set sizes and varying numbers of model choice. In real data, application to Go/No-Go and Simon tasks allowed computation of signals from the missing nodes and the consequent computation of model evidence in all subjects compared to 62 and 48 percent respectively if no preprocessing was performed. These results demonstrate the face validity of the preprocessing scheme and open the possibility of using single-subject DCM as an individual cognitive phenotyping tool. Advisors/Committee Members: Wyatt, Christopher L. (committeechair), LaConte, Stephen M. (committee member), Laurienti, Paul J. (committee member), Beex, Aloysius A. (committee member), Baumann, William T. (committee member).

Subjects/Keywords: Dynamic Causal Modeling; Expectation-Maximization; Missing Data

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APA (6^th Edition):

Zaghlool, S. B. (2014). Dynamic Causal Modeling Across Network Topologies. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/46874

Chicago Manual of Style (16^th Edition):

Zaghlool, Shaza B. “Dynamic Causal Modeling Across Network Topologies.” 2014. Doctoral Dissertation, Virginia Tech. Accessed March 08, 2021. http://hdl.handle.net/10919/46874.

MLA Handbook (7^th Edition):

Zaghlool, Shaza B. “Dynamic Causal Modeling Across Network Topologies.” 2014. Web. 08 Mar 2021.

Vancouver:

Zaghlool SB. Dynamic Causal Modeling Across Network Topologies. [Internet] [Doctoral dissertation]. Virginia Tech; 2014. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10919/46874.

Council of Science Editors:

Zaghlool SB. Dynamic Causal Modeling Across Network Topologies. [Doctoral Dissertation]. Virginia Tech; 2014. Available from: http://hdl.handle.net/10919/46874

University of Sydney

17. Shephard, Grace. Linking deep Earth structure and surface topography through geodynamic models .

Degree: 2013, University of Sydney

URL: http://hdl.handle.net/2123/10184

► It is known that deep Earth and surface processes are intimately linked across broad spatial-temporal scales, however, quantifying this interaction remains elusive. The emergence of… (more)

▼ It is known that deep Earth and surface processes are intimately linked across broad spatial-temporal scales, however, quantifying this interaction remains elusive. The emergence of coupled plate tectonic and mantle convection, “geodynamic,” models has been facilitated by recent advances in computational resources, numerical solutions of mantle flow and plate model resolution. Five absolute reference frames based on hotspot tracks, palaeomagnetic data and subducted slabs are compared, resulting in differences in plate boundary locations of up to 3000 km and in plate velocities of up to 10 cm/yr. Through a comparison to seismic tomography, differences in predicted mantle structure for features ~20,000 km wide are largely due to velocity variability, and are best reproduced in hotspot frames. Shorter wavelength differences (<4,000 km) are attributed to plate boundary locations and are best reproduced with hybrid hotspot-palaeomagnetic frames. The Jurassic-Cretaceous history of the circum-Arctic is one of the most poorly constrained realms in global plate reconstructions. A revised regional model since 200 Ma, with connected plate boundaries is presented, focusing on the opening and closing the South Anuyi and Oimyakon oceans, the Amerasia Basin and Panthalassa. Tomographic and geodynamic evidence for these oceans are found under present-day Greenland, Siberia and North America. The time-dependent models also suggest an alternative interpretation of the location and affinities of the “Farallon” and “Mongol-Okhotsk” slabs. A powerful outcome of geodynamic models is the evolution of dynamic topography. We suggest that at least 50% of the anomalously deep Argentine Basin can be attributed to long-lived, slab-driven negative dynamic topography. Similarly, for the Arctic, an evolving trend of subsidence from at least the Mid Jurassic to Early Cenozoic, followed by uplift or slowed subsidence to present-day is modelled. This signal is shown to partly account for vertical motions observed at the Barents Sea, Alaska and Slave Craton. This thesis shows that a careful consideration of absolute and relative plate reconstructions and modelling parameters, coupled with comparisons to seismic tomography and independent geological constraints, can provide key insights into the dynamic plate-mantle system.

Subjects/Keywords: dynamic topography; plate tectonics; mantle modeling; Arctic

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APA (6^th Edition):

Shephard, G. (2013). Linking deep Earth structure and surface topography through geodynamic models . (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/10184

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):

Shephard, Grace. “Linking deep Earth structure and surface topography through geodynamic models .” 2013. Thesis, University of Sydney. Accessed March 08, 2021. http://hdl.handle.net/2123/10184.

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

MLA Handbook (7^th Edition):

Shephard, Grace. “Linking deep Earth structure and surface topography through geodynamic models .” 2013. Web. 08 Mar 2021.

Vancouver:

Shephard G. Linking deep Earth structure and surface topography through geodynamic models . [Internet] [Thesis]. University of Sydney; 2013. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2123/10184.

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

Council of Science Editors:

Shephard G. Linking deep Earth structure and surface topography through geodynamic models . [Thesis]. University of Sydney; 2013. Available from: http://hdl.handle.net/2123/10184

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

Texas A&M University

18. Wang, Chao. Dynamic Simulation and Control Design Tools for Heat Pump Systems.

Degree: PhD, Mechanical Engineering, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/192019

► In heating, ventilating, and air conditioning applications, heat pump systems are devices that provide cooling and heating to residential and commercial buildings. Control-oriented models and… (more)

▼ In heating, ventilating, and air conditioning applications, heat pump systems are devices that provide cooling and heating to residential and commercial buildings. Control-oriented models and control tools are essential to meet load requirements and to maximize coefficient of performance. The main challenges include complex system nonlinearities and multivariable interactions. This dissertation presents dynamic modeling and control design tools for heat pump systems. The first part introduces the dynamic modeling and development of a graphical user interface. The system-level dynamic model is developed based on component models, including compressors, expansion valves, finite control volume heat exchangers, etc. Validation results show that the models are effective tools to capture the dynamic characteristics in cooling, heating, and defrosting modes. A graphical user interface is developed for the dynamic models to facilitate parameter inputs and to generate steady-state operating conditions. The second part introduces energy optimal control and intelligent defrost control. Three energy optimal control algorithms are proposed: single-input, single-output control with fan scheduling; multiple single-input, single-output control; and multi-input, multi-output control. These strategies, with varying levels of complexity, range from decoupled proportional-integral-derivative control to linear quadratic Gaussian multivariable control. Validation results show that all three algorithms are effective for heat pump control. The goal of the intelligent defrost control is to maximize both system efficiency and human comfort during defrosting cycles. Experimental results show that there exists an optimal combination of frost growth time and defrost termination temperature. Under a higher moisture rate or lower ambient temperature, the optimal frost growth time becomes more sensitive. Advisors/Committee Members: Rasmussen, Bryan (advisor), Mukherjee, Partha (committee member), Rathinam, Sivakumar (committee member), Zhan, Wei (committee member).

Subjects/Keywords: heat pump systems; dynamic modeling; control design

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

APA (6^th Edition):

Wang, C. (2016). Dynamic Simulation and Control Design Tools for Heat Pump Systems. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/192019

Chicago Manual of Style (16^th Edition):

Wang, Chao. “Dynamic Simulation and Control Design Tools for Heat Pump Systems.” 2016. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/192019.

MLA Handbook (7^th Edition):

Wang, Chao. “Dynamic Simulation and Control Design Tools for Heat Pump Systems.” 2016. Web. 08 Mar 2021.

Vancouver:

Wang C. Dynamic Simulation and Control Design Tools for Heat Pump Systems. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/192019.

Council of Science Editors:

Wang C. Dynamic Simulation and Control Design Tools for Heat Pump Systems. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/192019

Penn State University

19. Steinway, Steven Nathaniel. Predictive Network Modeling And Experimentation In Complex Biological Systems: Applications To Cancer And Infectious Disease.

Degree: 2015, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/24852

► Biology is incredibly complex – at the molecular, cellular, tissue, and population level, there exists a tremendous number of discrete interacting components tightly regulating the… (more)

▼ Biology is incredibly complex – at the molecular, cellular, tissue, and population level, there exists a tremendous number of discrete interacting components tightly regulating the processes that sustain life. Biological systems have traditionally been viewed in a reductionist manner often literally (and metaphorically) through a magnifying glass, leading to insight into how the individual parts work. Network theory, on the other hand, can be used to put the pieces together, to understand how complex and emergent behaviors arise from the totality of interactions in complex systems, such as those seen in biology. Network theory is the study of systems of discrete interacting components and provides a framework for understanding complex systems. A network-focused investigation of a complex biological system allows for the understanding of the system’s emergent properties, for example its function and dynamics. Network dynamics are of particular interest biologically because biological systems are not static but are constantly changing in response to perturbations and environmental stimuli in space and time. Systems level biological analysis has been aided by the recent explosion of high throughput data. This has led to an abundance of quantitative and qualitative information related to the activation of biological systems, but frequently there is still a paucity of kinetic and temporal information. Discrete dynamic modeling provides a means to create predictive models of biological systems by integrating fragmentary and qualitative interaction information. Using discrete dynamic modeling, a structural (static) network of biological regulatory relationships can be translated into a mathematical model without the use of kinetic parameters. This model can describe the dynamics of a biological system (i.e. how it changes over time), both in normal and in perturbation (e.g. disease) scenarios. In this dissertation we present the application of network theory and discrete dynamic modeling integrated with experimental laboratory analysis to understand biological diseases in three contexts. The first is the construction of a network model of epidermal derived growth factor receptor (EGFR) signaling in cancer. We translate this model into two types of discrete models: a Boolean model and a three-state model. We show how the effects of an EGFR inhibitor (such as the drug gefitinib) can suppress tumor growth, and we model how genomic variants can augment the effect of EGFR inhibition in tumor growth. Importantly, we compare discrete modeling outcomes to an alternative modeling framework, which relies on detailed kinetic information, called ordinary differential equation (ODE) modeling and show that both models achieve similar findings. Our results demonstrate that discrete dynamic model can accurately model biomedical systems and make important predictions about the effect a drug will have on a disease (e.g. tumor growth) in the context of various perturbations. Importantly, discrete dynamic models can be employed in the… Advisors/Committee Members: Reka Z Albert, Dissertation Advisor/Co-Advisor, "Thomas P Loughran, Jr", Dissertation Advisor/Co-Advisor, Reka Z Albert, Committee Chair/Co-Chair, David J Feith, Committee Member, James Riley Broach, Committee Member, Diane M Thiboutot, Committee Member.

Subjects/Keywords: Network analysis; dynamic modeling; discrete dynamic modeling; cancer; microbiome; tumor invasion & metastasis

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APA (6^th Edition):

Steinway, S. N. (2015). Predictive Network Modeling And Experimentation In Complex Biological Systems: Applications To Cancer And Infectious Disease. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/24852

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):

Steinway, Steven Nathaniel. “Predictive Network Modeling And Experimentation In Complex Biological Systems: Applications To Cancer And Infectious Disease.” 2015. Thesis, Penn State University. Accessed March 08, 2021. https://submit-etda.libraries.psu.edu/catalog/24852.

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

MLA Handbook (7^th Edition):

Steinway, Steven Nathaniel. “Predictive Network Modeling And Experimentation In Complex Biological Systems: Applications To Cancer And Infectious Disease.” 2015. Web. 08 Mar 2021.

Vancouver:

Steinway SN. Predictive Network Modeling And Experimentation In Complex Biological Systems: Applications To Cancer And Infectious Disease. [Internet] [Thesis]. Penn State University; 2015. [cited 2021 Mar 08]. Available from: https://submit-etda.libraries.psu.edu/catalog/24852.

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

Council of Science Editors:

Steinway SN. Predictive Network Modeling And Experimentation In Complex Biological Systems: Applications To Cancer And Infectious Disease. [Thesis]. Penn State University; 2015. Available from: https://submit-etda.libraries.psu.edu/catalog/24852

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

Vanderbilt University

20. Koval, Andriy Volodymyrovych. A Graphical System for Longitudinal Modeling using Dynamic Documents: Application to NLSY97 Religiosity Data.

Degree: PhD, Psychology, 2014, Vanderbilt University

URL: http://hdl.handle.net/1803/13745

► This dissertation proposes a graphical analysis and presentation system for fitting, evaluating, and reporting longitudinal models in social sciences. The graphical innovations demonstrated here address… (more)

Subjects/Keywords: religiosity; latent curve modeling; longitudinal modeling; dynamic documents; NLSY97

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APA (6^th Edition):

Koval, A. V. (2014). A Graphical System for Longitudinal Modeling using Dynamic Documents: Application to NLSY97 Religiosity Data. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13745

Chicago Manual of Style (16^th Edition):

Koval, Andriy Volodymyrovych. “A Graphical System for Longitudinal Modeling using Dynamic Documents: Application to NLSY97 Religiosity Data.” 2014. Doctoral Dissertation, Vanderbilt University. Accessed March 08, 2021. http://hdl.handle.net/1803/13745.

MLA Handbook (7^th Edition):

Koval, Andriy Volodymyrovych. “A Graphical System for Longitudinal Modeling using Dynamic Documents: Application to NLSY97 Religiosity Data.” 2014. Web. 08 Mar 2021.

Vancouver:

Koval AV. A Graphical System for Longitudinal Modeling using Dynamic Documents: Application to NLSY97 Religiosity Data. [Internet] [Doctoral dissertation]. Vanderbilt University; 2014. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1803/13745.

Council of Science Editors:

Koval AV. A Graphical System for Longitudinal Modeling using Dynamic Documents: Application to NLSY97 Religiosity Data. [Doctoral Dissertation]. Vanderbilt University; 2014. Available from: http://hdl.handle.net/1803/13745

Penn State University

21. Vu, Duy Quang. Statistical Models and Algorithms for Large Network Analysis.

Degree: 2012, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/14640

► The emergence and growth of online social media and network services has provided us with new data collection tools to study human behaviors. Traces of… (more)

Subjects/Keywords: network work analysis; survival modeling; dynamic network formation; latent class modeling

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APA (6^th Edition):

Vu, D. Q. (2012). Statistical Models and Algorithms for Large Network Analysis. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/14640

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):

Vu, Duy Quang. “Statistical Models and Algorithms for Large Network Analysis.” 2012. Thesis, Penn State University. Accessed March 08, 2021. https://submit-etda.libraries.psu.edu/catalog/14640.

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

MLA Handbook (7^th Edition):

Vu, Duy Quang. “Statistical Models and Algorithms for Large Network Analysis.” 2012. Web. 08 Mar 2021.

Vancouver:

Vu DQ. Statistical Models and Algorithms for Large Network Analysis. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Mar 08]. Available from: https://submit-etda.libraries.psu.edu/catalog/14640.

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

Council of Science Editors:

Vu DQ. Statistical Models and Algorithms for Large Network Analysis. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/14640

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

University of Edinburgh

22. Krause, Benjamin. Flexible neural architectures for sequence modeling.

Degree: PhD, 2020, University of Edinburgh

URL: http://hdl.handle.net/1842/37088

► Auto-regressive sequence models can estimate the distribution of any type of sequential data. To study sequence models, we consider the problem of language modeling, which… (more)

▼ Auto-regressive sequence models can estimate the distribution of any type of sequential data. To study sequence models, we consider the problem of language modeling, which entails predicting probability distributions over sequences of text. This thesis improves on previous language modeling approaches by giving models additional flexibility to adapt to their inputs. In particular, we focus on multiplicative LSTM (mLSTM), which has added flexibility to change its recurrent transition function depending on its input as compared with traditional LSTM, and dynamic evaluation, which helps LSTM (or other sequence models) adapt to the recent sequence history to exploit re-occurring patterns within a sequence. We find that using these adaptive approaches for language modeling improves their predictions by helping them recover from surprising tokens and sequences. mLSTM is a hybrid of a multiplicative recurrent neural network (mRNN) and an LSTM. mLSTM is characterized by its ability to have recurrent transition functions that can vary more for each possible input token, and makes better predictions as compared with LSTM after viewing unexpected inputs in our experiments. mLSTM also outperformed all previous neural architectures at character level language modeling. Dynamic evaluation is a method for adapting sequence models to the recent sequence history at inference time using gradient descent, assigning higher probabilities to re-occurring sequential patterns. While dynamic evaluation was often previously viewed as a way of using additional training data, this thesis argues that dynamic evaluation is better thought of as a way of adapting probability distributions to their own predictions. We also explore and develop dynamic evaluation methods with the goals of achieving the best prediction performance and computational/memory efficiency, as well as understanding why these methods work. Different variants of dynamic evaluation are applied to a number of different architectures, resulting in improvements to language modeling over a longer contexts, as well as polyphonic music prediction. Dynamically evaluated models are also able to generate conditional samples that repeat patterns from the conditioning text, and achieve improved generalization in modeling out of domain sequences. The added flexibility that dynamic evaluation gives models allows them to recover faster when predicting unexpected sequences. The proposed approaches improve on previous language models by giving them additional flexibility to adapt to their inputs. mLSTM and dynamic evaluation both contributed to improvements to the state of the art in language modeling, and have potential applications to a wider range of sequence modeling problems.

Subjects/Keywords: language modeling; multiplicative LSTM; mLSTM; dynamic evaluation; sequence modeling

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

APA (6^th Edition):

Krause, B. (2020). Flexible neural architectures for sequence modeling. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/37088

Chicago Manual of Style (16^th Edition):

Krause, Benjamin. “Flexible neural architectures for sequence modeling.” 2020. Doctoral Dissertation, University of Edinburgh. Accessed March 08, 2021. http://hdl.handle.net/1842/37088.

MLA Handbook (7^th Edition):

Krause, Benjamin. “Flexible neural architectures for sequence modeling.” 2020. Web. 08 Mar 2021.

Vancouver:

Krause B. Flexible neural architectures for sequence modeling. [Internet] [Doctoral dissertation]. University of Edinburgh; 2020. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1842/37088.

Council of Science Editors:

Krause B. Flexible neural architectures for sequence modeling. [Doctoral Dissertation]. University of Edinburgh; 2020. Available from: http://hdl.handle.net/1842/37088

University of Edinburgh

23. Krause, Benjamin. Flexible neural architectures for sequence modeling.

Degree: PhD, 2020, University of Edinburgh

URL: https://doi.org/10.7488/era/389 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.806160

► Auto-regressive sequence models can estimate the distribution of any type of sequential data. To study sequence models, we consider the problem of language modeling, which… (more)

▼ Auto-regressive sequence models can estimate the distribution of any type of sequential data. To study sequence models, we consider the problem of language modeling, which entails predicting probability distributions over sequences of text. This thesis improves on previous language modeling approaches by giving models additional flexibility to adapt to their inputs. In particular, we focus on multiplicative LSTM (mLSTM), which has added flexibility to change its recurrent transition function depending on its input as compared with traditional LSTM, and dynamic evaluation, which helps LSTM (or other sequence models) adapt to the recent sequence history to exploit re-occurring patterns within a sequence. We find that using these adaptive approaches for language modeling improves their predictions by helping them recover from surprising tokens and sequences. mLSTM is a hybrid of a multiplicative recurrent neural network (mRNN) and an LSTM. mLSTM is characterized by its ability to have recurrent transition functions that can vary more for each possible input token, and makes better predictions as compared with LSTM after viewing unexpected inputs in our experiments. mLSTM also outperformed all previous neural architectures at character level language modeling. Dynamic evaluation is a method for adapting sequence models to the recent sequence history at inference time using gradient descent, assigning higher probabilities to re-occurring sequential patterns. While dynamic evaluation was often previously viewed as a way of using additional training data, this thesis argues that dynamic evaluation is better thought of as a way of adapting probability distributions to their own predictions. We also explore and develop dynamic evaluation methods with the goals of achieving the best prediction performance and computational/memory efficiency, as well as understanding why these methods work. Different variants of dynamic evaluation are applied to a number of different architectures, resulting in improvements to language modeling over a longer contexts, as well as polyphonic music prediction. Dynamically evaluated models are also able to generate conditional samples that repeat patterns from the conditioning text, and achieve improved generalization in modeling out of domain sequences. The added flexibility that dynamic evaluation gives models allows them to recover faster when predicting unexpected sequences. The proposed approaches improve on previous language models by giving them additional flexibility to adapt to their inputs. mLSTM and dynamic evaluation both contributed to improvements to the state of the art in language modeling, and have potential applications to a wider range of sequence modeling problems.

Subjects/Keywords: language modeling; multiplicative LSTM; mLSTM; dynamic evaluation; sequence modeling

Record Details Similar Records Cite « Share

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

APA (6^th Edition):

Krause, B. (2020). Flexible neural architectures for sequence modeling. (Doctoral Dissertation). University of Edinburgh. Retrieved from https://doi.org/10.7488/era/389 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.806160

Chicago Manual of Style (16^th Edition):

Krause, Benjamin. “Flexible neural architectures for sequence modeling.” 2020. Doctoral Dissertation, University of Edinburgh. Accessed March 08, 2021. https://doi.org/10.7488/era/389 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.806160.

MLA Handbook (7^th Edition):

Krause, Benjamin. “Flexible neural architectures for sequence modeling.” 2020. Web. 08 Mar 2021.

Vancouver:

Krause B. Flexible neural architectures for sequence modeling. [Internet] [Doctoral dissertation]. University of Edinburgh; 2020. [cited 2021 Mar 08]. Available from: https://doi.org/10.7488/era/389 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.806160.

Council of Science Editors:

Krause B. Flexible neural architectures for sequence modeling. [Doctoral Dissertation]. University of Edinburgh; 2020. Available from: https://doi.org/10.7488/era/389 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.806160

Texas A&M University

24. He, Zhenhua. Dynamic Geomechanical Modeling of the Induced Microseismicity During Hydraulic Fracturing.

Degree: PhD, Geophysics, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/174552

► The activation of natural fractures and associated microseismicity generation and radiation during hydraulic fracturing treatments are dynamic processes. However, most of the current hydraulic fracturing… (more)

▼ The activation of natural fractures and associated microseismicity generation and radiation during hydraulic fracturing treatments are dynamic processes. However, most of the current hydraulic fracturing models are based on a quasi-static framework. Then, how significant are the dynamic stress perturbations during hydraulic fracturing treatments? Can they induce the activation of the horizontal bedding planes (BPs), which could be the source of some specific patterns of microseismic events? What are the characteristics and the predominant frequencies of the induced microseismic signals during hydraulic fracturing? How is the geometry (i.e., orientation and length) of the induced microseismic clouds correlated with that of the hydraulic fracture (HF)? We apply a dynamic finite element geomechanics method to address these important questions. We compare the dynamic and static stress perturbations and find the dynamic stress perturbations could cause more instability around a propagating HF. BPs could be more easily activated when the HF crosses them by a short distance compared with when the HF approaches them but is still a short distance away. Fracturing fluid penetration into BPs could weaken the BPs and facilitate the activation. The rupture propagates bilaterally along the BPs at different speeds. The study on the induced microseismicity during hydraulic fracturing in a fractured reservoir indicates that rupture patterns along the natural fractures (NFs) affect the signal spectrum. The spectrum could either have multiple predominant frequencies or be relatively flat over the investigated frequency range. Injection rate doesn’t affect the predominant frequencies obviously. A higher Young’s modulus could shift the predominant frequency higher. The correlation between the geometry of the hydraulic fracture and the induced microseismic cloud depends on the inclination of the NFs with respect to the maximum horizontal principal stress direction. When the inclination is either high or low, not so many MS events would be generated, and they are close to the HF but quite asymmetric about the HF. The MS cloud has small discrepancy with the HF in length but large discrepancy in strike. It is the opposite when the NF inclination is nearly optimal. Advisors/Committee Members: Duan, Benchun (advisor), Kitajima, Hiroko (committee member), Pope, Michael (committee member), Sun, Yuefeng (committee member), Valko, Peter (committee member).

Subjects/Keywords: Dynamic modeling; Geomechanical modeling; Induced microseismicity; Hydraulic fracturing

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APA (6^th Edition):

He, Z. (2018). Dynamic Geomechanical Modeling of the Induced Microseismicity During Hydraulic Fracturing. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174552

Chicago Manual of Style (16^th Edition):

He, Zhenhua. “Dynamic Geomechanical Modeling of the Induced Microseismicity During Hydraulic Fracturing.” 2018. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/174552.

MLA Handbook (7^th Edition):

He, Zhenhua. “Dynamic Geomechanical Modeling of the Induced Microseismicity During Hydraulic Fracturing.” 2018. Web. 08 Mar 2021.

Vancouver:

He Z. Dynamic Geomechanical Modeling of the Induced Microseismicity During Hydraulic Fracturing. [Internet] [Doctoral dissertation]. Texas A&M University; 2018. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/174552.

Council of Science Editors:

He Z. Dynamic Geomechanical Modeling of the Induced Microseismicity During Hydraulic Fracturing. [Doctoral Dissertation]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174552

University of Texas – Austin

25. Sayar, Paul Mikhaël. Development of effective medium models for quantification of elastic properties and modeling of velocity dispersion of saturated rocks.

Degree: PhD, Petroleum engineering, 2015, University of Texas – Austin

URL: http://hdl.handle.net/2152/33511

► Elastic effective medium theory (EMT) relates to quantitative rock physics modeling that calculates macroscopic properties of a mixture by incorporating the individual elastic properties, the… (more)

▼ Elastic effective medium theory (EMT) relates to quantitative rock physics modeling that calculates macroscopic properties of a mixture by incorporating the individual elastic properties, the volume fractions, and the spatial arrangement of the constituents that make up the rock. Despite the valuable merits of effective medium models, these theories exhibit limitations that require further investigation. Common instances are the non-unique configurations of the rock’s elements that give rise to identical wave velocities and the limiting assumption that rocks are purely elastic materials. Consequently, direct applications of classical EMTs can yield inaccurate and non-unique estimates of rock fabric properties that directly affect the assessment of elastic properties. The primary purpose of this dissertation is to improve the reliability of rock physics models based on the use of effective medium theories. In the first part, a rock physics model is developed for reliable estimation of velocities and elastic properties for sandstone-shale laminated rocks that are assumed to be vertical transverse isotropic (VTI). The new model is concerned with the reproduction of typical geological features and petrophysical properties of such formations that exhibit complex rock fabric. Isotropic and anisotropic versions of the self-consistent approximation and the differential effective medium theory, and Backus average are invoked to compute the effective medium’s stiffness tensor. The rock is separated into volumes of sandstone (regarded as isotropic) and shale (regarded as VTI), which are treated separately to reliably reproduce the spatial arrangement of the individual components included in the rock. Shale volumes enclose penny-shaped cracks and clay platelets aligned in the horizontal direction. Total porosity is divided into percolating porosity, isolated pores, and aligned fractures. The new simulation method is implement in three wells in the Haynesville shale and the Barnett shale. Estimates of elastic properties are verified when calculated velocities and sonic logs are in agreement. All relative differences between simulated and measured velocities are below 5.4%. To reduce non-uniqueness, electrical resistivity is calculated with modified effective medium theories and a procedure to compute Stoneley velocity is combined with the rock physics model. A method is advanced to calculate stress distribution and fracture initiation pressure around potential wellbores drilled horizontally in VTI rocks from the stiffness tensor obtained with the improved rock physics model. Effects of degree of anisotropy and elastic properties on fracture initiation pressure are investigated to determine a criterion to locate optimal depths along a vertical well to place a horizontal well. In the second part of the dissertation, an effective medium model is developed for reproduction of four of the main mechanisms of dispersion and attenuation of acoustic waves in saturated rocks. Simple and practical alternatives are introduced for effective… Advisors/Committee Members: Torres-Verdín, Carlos (advisor), Daigle, Hugh (committee member), Spikes, Kyle T (committee member), Olson, Jon (committee member), Sepehrnoori, Kamy (committee member).

Subjects/Keywords: Effective-medium modeling; Rock physics; VTI modeling; Unconventional reservoirs; Dynamic modeling; Saturated rocks

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APA (6^th Edition):

Sayar, P. M. (2015). Development of effective medium models for quantification of elastic properties and modeling of velocity dispersion of saturated rocks. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/33511

Chicago Manual of Style (16^th Edition):

Sayar, Paul Mikhaël. “Development of effective medium models for quantification of elastic properties and modeling of velocity dispersion of saturated rocks.” 2015. Doctoral Dissertation, University of Texas – Austin. Accessed March 08, 2021. http://hdl.handle.net/2152/33511.

MLA Handbook (7^th Edition):

Sayar, Paul Mikhaël. “Development of effective medium models for quantification of elastic properties and modeling of velocity dispersion of saturated rocks.” 2015. Web. 08 Mar 2021.

Vancouver:

Sayar PM. Development of effective medium models for quantification of elastic properties and modeling of velocity dispersion of saturated rocks. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2015. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2152/33511.

Council of Science Editors:

Sayar PM. Development of effective medium models for quantification of elastic properties and modeling of velocity dispersion of saturated rocks. [Doctoral Dissertation]. University of Texas – Austin; 2015. Available from: http://hdl.handle.net/2152/33511

University of Manitoba

26. Daryabak, Mehdi. Modeling line-commutated converter HVDC transmission systems using dynamic phasors.

Degree: Electrical and Computer Engineering, 2014, University of Manitoba

URL: http://hdl.handle.net/1993/31632

► This thesis develops the dynamic phasor model of a line-commutated converter (LCC) high-voltage direct current (HVDC) transmission system. The mathematical definition and properties of dynamic… (more)

Subjects/Keywords: Dynamic average modeling; Dynamic phasors; EMT simulation; line commutated converter (LCC) HVDC

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APA (6^th Edition):

Daryabak, M. (2014). Modeling line-commutated converter HVDC transmission systems using dynamic phasors. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/31632

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):

Daryabak, Mehdi. “Modeling line-commutated converter HVDC transmission systems using dynamic phasors.” 2014. Thesis, University of Manitoba. Accessed March 08, 2021. http://hdl.handle.net/1993/31632.

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

MLA Handbook (7^th Edition):

Daryabak, Mehdi. “Modeling line-commutated converter HVDC transmission systems using dynamic phasors.” 2014. Web. 08 Mar 2021.

Vancouver:

Daryabak M. Modeling line-commutated converter HVDC transmission systems using dynamic phasors. [Internet] [Thesis]. University of Manitoba; 2014. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1993/31632.

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

Council of Science Editors:

Daryabak M. Modeling line-commutated converter HVDC transmission systems using dynamic phasors. [Thesis]. University of Manitoba; 2014. Available from: http://hdl.handle.net/1993/31632

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

Delft University of Technology

27. Simplicio, P. (author). Helicopter nonlinear flight control: An acceleration measurements-based approach using incremental nonlinear dynamic inversion.

Degree: 2011, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d2ffe4d1-219e-4965-a6b4-debb900ded4c

►

Due to the inherent instabilities and nonlinearities of rotorcraft dynamics, its changing properties during flight and the difficulties to predict its aerodynamics with high levels… (more)

Subjects/Keywords: helicopter modeling; helicopter flight control; nonlinear dynamic inversion; incremental nonlinear dynamic inversion; pseudo-control hedging

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APA (6^th Edition):

Simplicio, P. (. (2011). Helicopter nonlinear flight control: An acceleration measurements-based approach using incremental nonlinear dynamic inversion. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d2ffe4d1-219e-4965-a6b4-debb900ded4c

Chicago Manual of Style (16^th Edition):

Simplicio, P (author). “Helicopter nonlinear flight control: An acceleration measurements-based approach using incremental nonlinear dynamic inversion.” 2011. Masters Thesis, Delft University of Technology. Accessed March 08, 2021. http://resolver.tudelft.nl/uuid:d2ffe4d1-219e-4965-a6b4-debb900ded4c.

MLA Handbook (7^th Edition):

Simplicio, P (author). “Helicopter nonlinear flight control: An acceleration measurements-based approach using incremental nonlinear dynamic inversion.” 2011. Web. 08 Mar 2021.

Vancouver:

Simplicio P(. Helicopter nonlinear flight control: An acceleration measurements-based approach using incremental nonlinear dynamic inversion. [Internet] [Masters thesis]. Delft University of Technology; 2011. [cited 2021 Mar 08]. Available from: http://resolver.tudelft.nl/uuid:d2ffe4d1-219e-4965-a6b4-debb900ded4c.

Council of Science Editors:

Simplicio P(. Helicopter nonlinear flight control: An acceleration measurements-based approach using incremental nonlinear dynamic inversion. [Masters Thesis]. Delft University of Technology; 2011. Available from: http://resolver.tudelft.nl/uuid:d2ffe4d1-219e-4965-a6b4-debb900ded4c

University of Southern California

28. Abdul Ghaffar, Alia Farhana. The development of a mathematical model of a hybrid airship.

Degree: MS, Aerospace Engineering, 2012, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/115998/rec/6558

► The mathematical model of a winged hybrid airship is developed for the analysis of its dynamic stability characteristics. A full nonlinear equation of motion that… (more)

Subjects/Keywords: hybrid airship; equation of motion; airship; winged airship; dynamic stability analysis; dynamic modeling

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

APA (6^th Edition):

Abdul Ghaffar, A. F. (2012). The development of a mathematical model of a hybrid airship. (Masters Thesis). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/115998/rec/6558

Chicago Manual of Style (16^th Edition):

Abdul Ghaffar, Alia Farhana. “The development of a mathematical model of a hybrid airship.” 2012. Masters Thesis, University of Southern California. Accessed March 08, 2021. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/115998/rec/6558.

MLA Handbook (7^th Edition):

Abdul Ghaffar, Alia Farhana. “The development of a mathematical model of a hybrid airship.” 2012. Web. 08 Mar 2021.

Vancouver:

Abdul Ghaffar AF. The development of a mathematical model of a hybrid airship. [Internet] [Masters thesis]. University of Southern California; 2012. [cited 2021 Mar 08]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/115998/rec/6558.

Council of Science Editors:

Abdul Ghaffar AF. The development of a mathematical model of a hybrid airship. [Masters Thesis]. University of Southern California; 2012. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/115998/rec/6558

29. Li, Bo. Modeling and Runtime Systems for Coordinated Power-Performance Management.

Degree: PhD, Computer Science and Applications, 2019, Virginia Tech

URL: http://hdl.handle.net/10919/87064

► System efficiency on high-performance computing (HPC) systems is the key to achieving the goal of power budget for exascale supercomputers. Techniques for adjusting the performance… (more)

Subjects/Keywords: Parallel Performance Modeling; Dynamic Voltage and Frequency Scaling; Dynamic Memory Throttling; Dynamic Concurrency Throttling; Shared-Memory Systems

10 more images…

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

APA (6^th Edition):

Li, B. (2019). Modeling and Runtime Systems for Coordinated Power-Performance Management. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/87064

Chicago Manual of Style (16^th Edition):

Li, Bo. “Modeling and Runtime Systems for Coordinated Power-Performance Management.” 2019. Doctoral Dissertation, Virginia Tech. Accessed March 08, 2021. http://hdl.handle.net/10919/87064.

MLA Handbook (7^th Edition):

Li, Bo. “Modeling and Runtime Systems for Coordinated Power-Performance Management.” 2019. Web. 08 Mar 2021.

Vancouver:

Li B. Modeling and Runtime Systems for Coordinated Power-Performance Management. [Internet] [Doctoral dissertation]. Virginia Tech; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10919/87064.

Council of Science Editors:

Li B. Modeling and Runtime Systems for Coordinated Power-Performance Management. [Doctoral Dissertation]. Virginia Tech; 2019. Available from: http://hdl.handle.net/10919/87064

Penn State University

30. Islam, Mohammad Mazharul. Metabolic modeling of microbial communities.

Degree: 2014, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/20510

► Most microbial communities change with time in response to changes and/or perturbations in environmental conditions. The temporal variations in inter-species metabolic interactions within these communities… (more)

Subjects/Keywords: dynamic; microbial communities; modeling; d-OptCom; Uranium reduction; Auxotrophic mutants. metabolic modeling

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

APA (6^th Edition):

Islam, M. M. (2014). Metabolic modeling of microbial communities. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/20510

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):

Islam, Mohammad Mazharul. “Metabolic modeling of microbial communities.” 2014. Thesis, Penn State University. Accessed March 08, 2021. https://submit-etda.libraries.psu.edu/catalog/20510.

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

MLA Handbook (7^th Edition):

Islam, Mohammad Mazharul. “Metabolic modeling of microbial communities.” 2014. Web. 08 Mar 2021.

Vancouver:

Islam MM. Metabolic modeling of microbial communities. [Internet] [Thesis]. Penn State University; 2014. [cited 2021 Mar 08]. Available from: https://submit-etda.libraries.psu.edu/catalog/20510.

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

Council of Science Editors:

Islam MM. Metabolic modeling of microbial communities. [Thesis]. Penn State University; 2014. Available from: https://submit-etda.libraries.psu.edu/catalog/20510

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

Open Access Theses and Dissertations