You searched for +publisher:"Old Dominion University" +contributor:("Han Bao").
Showing records 1 – 12 of
12 total matches.
No search limiters apply to these results.
1.
Nguyen, Vi Hong.
Optimal Ship Maintenance Scheduling Under Restricted Conditions and Constrained Resources.
Degree: PhD, Mechanical & Aerospace Engineering, 2017, Old Dominion University
URL: 9780355082340
;
https://digitalcommons.odu.edu/mae_etds/25 
► The research presented in this dissertation addresses the application of evolution algorithms, i.e. Genetic Algorithm (GA) and Differential Evolution algorithm (DE) to scheduling problems…
(more)
▼ The research presented in this dissertation addresses the application of evolution algorithms, i.e. Genetic Algorithm (GA) and Differential Evolution algorithm (DE) to scheduling problems in the presence of restricted conditions and resource limitations. This research is motivated by the scheduling of engineering design tasks in shop scheduling problems and ship maintenance scheduling problems to minimize total completion time. The thesis consists of two major parts; the first corresponds to the first appended paper and deals with the computational complexity of mixed shop scheduling problems. A modified Genetic algorithm is proposed to solve the problem. Computational experiments, conducted to evaluate its performance against known optimal solutions for different sized problems, show its superiority in computation time and the high applicability in practical mixed shop scheduling problems. The second part considers the major theme in the second appended paper and is related to the ship maintenance scheduling problem and the extended research on the multi-mode resource-constrained ship scheduling problem. A heuristic Differential Evolution is developed and applied to solve these problems. A mathematical optimization model is also formulated for the multi-mode resource-constrained ship scheduling problem. Through the computed results, DE proves its effectiveness and efficiency in addressing both single and multi-objective ship maintenance scheduling problems
Advisors/Committee Members: Han Bao, Miltiadis Kotinis, Resit Unal.
Subjects/Keywords: Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nguyen, V. H. (2017). Optimal Ship Maintenance Scheduling Under Restricted Conditions and Constrained Resources. (Doctoral Dissertation). Old Dominion University. Retrieved from 9780355082340 ; https://digitalcommons.odu.edu/mae_etds/25
Chicago Manual of Style (16th Edition):
Nguyen, Vi Hong. “Optimal Ship Maintenance Scheduling Under Restricted Conditions and Constrained Resources.” 2017. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
9780355082340 ; https://digitalcommons.odu.edu/mae_etds/25.
MLA Handbook (7th Edition):
Nguyen, Vi Hong. “Optimal Ship Maintenance Scheduling Under Restricted Conditions and Constrained Resources.” 2017. Web. 18 Jan 2021.
Vancouver:
Nguyen VH. Optimal Ship Maintenance Scheduling Under Restricted Conditions and Constrained Resources. [Internet] [Doctoral dissertation]. Old Dominion University; 2017. [cited 2021 Jan 18].
Available from: 9780355082340 ; https://digitalcommons.odu.edu/mae_etds/25.
Council of Science Editors:
Nguyen VH. Optimal Ship Maintenance Scheduling Under Restricted Conditions and Constrained Resources. [Doctoral Dissertation]. Old Dominion University; 2017. Available from: 9780355082340 ; https://digitalcommons.odu.edu/mae_etds/25
2.
Obeng, Gershom Kwaku.
Development of a DSM-Based Model for Managing the Design of Complex Systems Considering the Impact of Technological Obsolescence.
Degree: PhD, Mechanical & Aerospace Engineering, 2016, Old Dominion University
URL: 9781369567403
;
https://digitalcommons.odu.edu/mae_etds/22
► Obsolescence has been a constant issue for process planners and designers and if not properly accounted for, obsolescence can become an expensive issue. As…
(more)
▼ Obsolescence has been a constant issue for process planners and designers and if not properly accounted for, obsolescence can become an expensive issue. As systems become more complex, interconnected, and nonhomogeneous, separate studies of single groups of equipment are no longer sufficient in modeling the obsolescence of the systems that they make up. The purpose of this dissertation is to model the likelihood of a process's design becoming obsolescent given the obsolescent behavior of the equipment used to complete the process. The methodology discussed in this work is based on a combination of using a systems engineering tool called the DSM (Design Structure Matrix) and a technological forecasting tool known as the growth curve to simulate the duration and cost of completing a process, and to determine if the process'sdesign will keep its utility as it ages.
Advisors/Committee Members: Han Bao, Miltiadis Kotinis, Ghaith Rabdi.
Subjects/Keywords: Cost estimation; Design structure matrix; Process planning; Project management; Technological obsolescence; Industrial Engineering; Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Obeng, G. K. (2016). Development of a DSM-Based Model for Managing the Design of Complex Systems Considering the Impact of Technological Obsolescence. (Doctoral Dissertation). Old Dominion University. Retrieved from 9781369567403 ; https://digitalcommons.odu.edu/mae_etds/22
Chicago Manual of Style (16th Edition):
Obeng, Gershom Kwaku. “Development of a DSM-Based Model for Managing the Design of Complex Systems Considering the Impact of Technological Obsolescence.” 2016. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
9781369567403 ; https://digitalcommons.odu.edu/mae_etds/22.
MLA Handbook (7th Edition):
Obeng, Gershom Kwaku. “Development of a DSM-Based Model for Managing the Design of Complex Systems Considering the Impact of Technological Obsolescence.” 2016. Web. 18 Jan 2021.
Vancouver:
Obeng GK. Development of a DSM-Based Model for Managing the Design of Complex Systems Considering the Impact of Technological Obsolescence. [Internet] [Doctoral dissertation]. Old Dominion University; 2016. [cited 2021 Jan 18].
Available from: 9781369567403 ; https://digitalcommons.odu.edu/mae_etds/22.
Council of Science Editors:
Obeng GK. Development of a DSM-Based Model for Managing the Design of Complex Systems Considering the Impact of Technological Obsolescence. [Doctoral Dissertation]. Old Dominion University; 2016. Available from: 9781369567403 ; https://digitalcommons.odu.edu/mae_etds/22
3.
Khan, Nadeem.
Identification and Optimal Linear Tracking Control of ODU Autonomous Surface Vehicle.
Degree: PhD, Mechanical & Aerospace Engineering, 2018, Old Dominion University
URL: 9780438538382
;
https://digitalcommons.odu.edu/mae_etds/45
► Autonomous surface vehicles (ASVs) are being used for diverse applications of civilian and military importance such as: military reconnaissance, sea patrol, bathymetry, environmental monitoring,…
(more)
▼ Autonomous surface vehicles (ASVs) are being used for diverse applications of civilian and military importance such as: military reconnaissance, sea patrol, bathymetry, environmental monitoring, and oceanographic research. Currently, these unmanned tasks can accurately be accomplished by ASVs due to recent advancements in computing, sensing, and actuating systems. For this reason, researchers around the world have been taking interest in ASVs for the last decade. Due to the ever-changing surface of water and stochastic disturbances such as wind and tidal currents that greatly affect the path-following ability of ASVs, identification of an accurate model of inherently nonlinear and stochastic ASV system and then designing a viable control using that model for its planar motion is a challenging task. For planar motion control of ASV, the work done by researchers is mainly based on the theoretical modeling in which the nonlinear hydrodynamic terms are determined, while some work suggested the nonlinear control techniques and adhered to simulation results. Also, the majority of work is related to the mono- or twin-hull ASVs with a single rudder. The ODU-ASV used in present research is a twin-hull design having two DC trolling motors for path-following motion.
A novel approach of time-domain open-loop observer Kalman filter identifications (OKID) and state-feedback optimal linear tracking control of ODU-ASV is presented, in which a linear state-space model of ODU-ASV is obtained from the measured input and output data. The accuracy of the identified model for ODU-ASV is confirmed by validation results of model output data reconstruction and benchmark residual analysis. Then, the OKID-identified model of the ODU-ASV is utilized to design the proposed controller for its planar motion such that a predefined cost function is minimized using state and control weighting matrices, which are determined by a multi-objective optimization genetic algorithm technique. The validation results of proposed controller using step inputs as well as sinusoidal and arc-like trajectories are presented to confirm the controller performance. Moreover, real-time water-trials were performed and their results confirm the validity of proposed controller in path-following motion of ODU-ASV.
Advisors/Committee Members: Jen-Kuang Juang, Gene Hou, Han Bao, Duc Nguyen.
Subjects/Keywords: Autonomous surface vehicle; Linear tracking control; Multi-objective genetic algorithm; Neural network; Observer Kalman filter identification; System identification; Artificial Intelligence and Robotics; Mechanical Engineering; Robotics
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Khan, N. (2018). Identification and Optimal Linear Tracking Control of ODU Autonomous Surface Vehicle. (Doctoral Dissertation). Old Dominion University. Retrieved from 9780438538382 ; https://digitalcommons.odu.edu/mae_etds/45
Chicago Manual of Style (16th Edition):
Khan, Nadeem. “Identification and Optimal Linear Tracking Control of ODU Autonomous Surface Vehicle.” 2018. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
9780438538382 ; https://digitalcommons.odu.edu/mae_etds/45.
MLA Handbook (7th Edition):
Khan, Nadeem. “Identification and Optimal Linear Tracking Control of ODU Autonomous Surface Vehicle.” 2018. Web. 18 Jan 2021.
Vancouver:
Khan N. Identification and Optimal Linear Tracking Control of ODU Autonomous Surface Vehicle. [Internet] [Doctoral dissertation]. Old Dominion University; 2018. [cited 2021 Jan 18].
Available from: 9780438538382 ; https://digitalcommons.odu.edu/mae_etds/45.
Council of Science Editors:
Khan N. Identification and Optimal Linear Tracking Control of ODU Autonomous Surface Vehicle. [Doctoral Dissertation]. Old Dominion University; 2018. Available from: 9780438538382 ; https://digitalcommons.odu.edu/mae_etds/45
4.
Cheng, Peng.
A Polymer-Based Microfluidic Device with Electrolyte-Enabled Distributed Transducers (EEDT) for Distributed Load Detection.
Degree: PhD, Mechanical Engineering, 2013, Old Dominion University
URL: 9781303775451
;
https://digitalcommons.odu.edu/mae_etds/125
► The capability of detecting distributed static and dynamic loads is indispensable in a wide variety of applications, such as examining anatomical structures of biological…
(more)
▼ The capability of detecting distributed static and dynamic loads is indispensable in a wide variety of applications, such as examining anatomical structures of biological tissues in tissue health analysis and minimally invasive surgery (MIS) and determining the texture of an object in robotics. This dissertation presents a comprehensive study of a polymer-based microfluidic device with electrolyte-enabled distributed transducers and demonstrates a new concept on using a single microfluidic device for distributed-load detection, which takes advantage of the low-cost microfluidic fabrication technology and the low modulus and biocompatibility of polymer. The core of the device is a single deformable polymer microstructure integrated with electrolyte-enabled transducers. While distributed loads are converted to different levels of deflections by the polymer microstructure, the deflections of the microstructure are translated to resistance changes by the five pairs of distributed transducers underneath the microstructure. Firstly, the design and working principle of the device is described. Then, due to its simple but efficient configuration, a standard fabrication process well developed for polydimethylsiloxane(PDMS)-based microfluidic devices is detailed and employed to fabricate this device. After that, the experimental setups for characterizing the device performance in static, step and sinusoidal inputs are illustrated. The experimental data then are collected and processed by using custom-built electronic circuits and custom LabVIEW/Matlab program to characterize the device performance. Lastly, the performance analysis of the device is conducted to obtain the performance parameters such as device sensitivity and load resolution. In summary, this polymer-based microfluidic device not only demonstrates the new concept and the capability of detecting distributed static and dynamic loads with a single device, with a thorough experimental study on the performance and characterization of this PDMS-based microfluidic device to correlate the device performance to its design parameters, but also the potential application of directly adopting this experimental method to measure the elasticity/viscoelasticity of a soft tissue.
Advisors/Committee Members: Zhili Julie Hao, Han Bao, Gene Hou, Michael Stacey.
Subjects/Keywords: Device characterization; Distributed load detection; Microfludic; Polymer-based device; Sensors; Transducers; Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cheng, P. (2013). A Polymer-Based Microfluidic Device with Electrolyte-Enabled Distributed Transducers (EEDT) for Distributed Load Detection. (Doctoral Dissertation). Old Dominion University. Retrieved from 9781303775451 ; https://digitalcommons.odu.edu/mae_etds/125
Chicago Manual of Style (16th Edition):
Cheng, Peng. “A Polymer-Based Microfluidic Device with Electrolyte-Enabled Distributed Transducers (EEDT) for Distributed Load Detection.” 2013. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
9781303775451 ; https://digitalcommons.odu.edu/mae_etds/125.
MLA Handbook (7th Edition):
Cheng, Peng. “A Polymer-Based Microfluidic Device with Electrolyte-Enabled Distributed Transducers (EEDT) for Distributed Load Detection.” 2013. Web. 18 Jan 2021.
Vancouver:
Cheng P. A Polymer-Based Microfluidic Device with Electrolyte-Enabled Distributed Transducers (EEDT) for Distributed Load Detection. [Internet] [Doctoral dissertation]. Old Dominion University; 2013. [cited 2021 Jan 18].
Available from: 9781303775451 ; https://digitalcommons.odu.edu/mae_etds/125.
Council of Science Editors:
Cheng P. A Polymer-Based Microfluidic Device with Electrolyte-Enabled Distributed Transducers (EEDT) for Distributed Load Detection. [Doctoral Dissertation]. Old Dominion University; 2013. Available from: 9781303775451 ; https://digitalcommons.odu.edu/mae_etds/125
5.
Zhang, Yujie.
Design and Implementation of a Z-Axis MEMS Gyroscope with a Symmetric Multiple-Mass Mechanical Structure.
Degree: MS, Mechanical Engineering, 2012, Old Dominion University
URL: 9781267647689
;
https://digitalcommons.odu.edu/mae_etds/164
► This thesis presents a z-axis MEMS gyroscope with a symmetric mechanical structure. The multiple-mass design prioritizes the sense-mode Quality Factor (Q) and thus improves…
(more)
▼ This thesis presents a z-axis MEMS gyroscope with a symmetric mechanical structure. The multiple-mass design prioritizes the sense-mode Quality Factor (Q) and thus improves its scale factor. The proposed mechanically coupled, dynamically balanced anti-phase sense-mode design minimizes energy dissipation through the substrate in order to maximize the Q. Numerical simulation is implemented in a finite element analysis software, COMSOL, to identify the two operation modes of the gyroscope: drive-mode and sense-mode. The multiple-mass gyroscope design is further fabricated using a one-mask process. Experimental characterization of frequency response in both drive-mode and sense-mode of the device are conducted, proving the design concept for improving the Q in the sense-mode.
Advisors/Committee Members: Zhili Julie Hao, Han Bao, Colin P. Britcher.
Subjects/Keywords: Z-axis MEMS; Anti-phase sense-mode design; Quality Factor; Applied Mechanics; Electrical and Computer Engineering; Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, Y. (2012). Design and Implementation of a Z-Axis MEMS Gyroscope with a Symmetric Multiple-Mass Mechanical Structure. (Thesis). Old Dominion University. Retrieved from 9781267647689 ; https://digitalcommons.odu.edu/mae_etds/164
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhang, Yujie. “Design and Implementation of a Z-Axis MEMS Gyroscope with a Symmetric Multiple-Mass Mechanical Structure.” 2012. Thesis, Old Dominion University. Accessed January 18, 2021.
9781267647689 ; https://digitalcommons.odu.edu/mae_etds/164.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhang, Yujie. “Design and Implementation of a Z-Axis MEMS Gyroscope with a Symmetric Multiple-Mass Mechanical Structure.” 2012. Web. 18 Jan 2021.
Vancouver:
Zhang Y. Design and Implementation of a Z-Axis MEMS Gyroscope with a Symmetric Multiple-Mass Mechanical Structure. [Internet] [Thesis]. Old Dominion University; 2012. [cited 2021 Jan 18].
Available from: 9781267647689 ; https://digitalcommons.odu.edu/mae_etds/164.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhang Y. Design and Implementation of a Z-Axis MEMS Gyroscope with a Symmetric Multiple-Mass Mechanical Structure. [Thesis]. Old Dominion University; 2012. Available from: 9781267647689 ; https://digitalcommons.odu.edu/mae_etds/164
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
6.
Regmi, Pusker Raj.
Feasibility of Mainstream Nitrite Oxidizing Bacteria Out-Selection and Anammox Polishing for Enhanced Nitrogen Removal.
Degree: PhD, Civil/Environmental Engineering, 2014, Old Dominion University
URL: 9781321346947
;
https://digitalcommons.odu.edu/cee_etds/60
► Short-cut nitrogen removal avoids nitrite oxidation to nitrate by nitrite oxidizing bacteria (NOB) and allows a) reduction of formed nitrite to nitrogen gas via…
(more)
▼ Short-cut nitrogen removal avoids nitrite oxidation to nitrate by nitrite oxidizing bacteria (NOB) and allows a) reduction of formed nitrite to nitrogen gas via heterotrophic denitrification and/or b) oxidation of remaining ammonia with formed nitrite to nitrogen gas via anaerobic ammonia oxidation (anammox). The precondition for achieving shortcut nitrogen removal is suppression of NOB, which is favored by warm and high ammonia strength conditions found in internally generated ammonia-rich waste streams through anaerobic digestion of waste solids referred to as sidestreams or reject water. The discovery of anammox bacteria in the mid-1990s, which are capable of transforming NH
4+ to nitrogen gas utilizing NO
2- as a substrate, has made suppression of NOB even more critical for nitrogen removal processes that take advantage of the lower energy and cost requirements of this nitrogen conversion compared to traditional nitrogen removal processes. Deammonification relies on ammonia oxidizing bacteria (AOB) to partially convert NH
4+ to NO
2- and anammox bacteria (AMX) to convert the remaining NH
4+ and NO
2- to nitrogen gas. The challenges of retaining slow growing AMX initially limited the expansion of benefits from autotrophic nitrogen removal; however, granular sludge and attached growth systems have proven highly effective in achieving deammonification in sidestream processes. Owing to the benefits that include energy and chemical savings, short-cut nitrogen removal has emerged as a viable technology for sidestream treatment. Consequently, mechanisms of NOB suppression to perform short-cut nitrogen removal are generally quite well understood for sidestream applications, which has allowed for the development of robust process control strategies. To date, the concept of deammonification has successfully been implemented in 100 full-scale treatment facilities treating high ammonia strength waste streams around the world.
Due to the success of sidestream short-cut nitrogen removal systems, there is great interest in applying this form of nitrogen removal to mainstream processes. Since the dilute and cold conditions of mainstream are not well-suited for suppression of NOB, short-cut nitrogen removal, in particular deammonification, has yet to be implemented in full-scale. The successful implementation of mainstream deammonification would revolutionize and disrupt the way in which biological nitrogen removal is achieved at wastewater treatment facilities. It represents a paradigm shift for the industry, offering the opportunity for sustainable wastewater treatment, energy neutral or even energy positive facilities and dramatic reductions in treatment costs, which has widespread environmental, economic and societal benefits.
This dissertation deals with the pilot-scale investigation of short-cut nitrogen removal in low ammonia strength wastewater with temperatures <25 >°C. An A-B process pilot-scale system was operated over a two year period. The…
Advisors/Committee Members: Gary Schafran, Charles bott, Mujde Erten-Unal, Sandeep Kumar, Han Bao.
Subjects/Keywords: Anammox; Biological Wastewater Treatment; Deammonification; Nitrite-Short; Nitrogen Removal; Short-Cut Nitrogen Removal; Civil Engineering; Environmental Engineering; Water Resource Management
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Regmi, P. R. (2014). Feasibility of Mainstream Nitrite Oxidizing Bacteria Out-Selection and Anammox Polishing for Enhanced Nitrogen Removal. (Doctoral Dissertation). Old Dominion University. Retrieved from 9781321346947 ; https://digitalcommons.odu.edu/cee_etds/60
Chicago Manual of Style (16th Edition):
Regmi, Pusker Raj. “Feasibility of Mainstream Nitrite Oxidizing Bacteria Out-Selection and Anammox Polishing for Enhanced Nitrogen Removal.” 2014. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
9781321346947 ; https://digitalcommons.odu.edu/cee_etds/60.
MLA Handbook (7th Edition):
Regmi, Pusker Raj. “Feasibility of Mainstream Nitrite Oxidizing Bacteria Out-Selection and Anammox Polishing for Enhanced Nitrogen Removal.” 2014. Web. 18 Jan 2021.
Vancouver:
Regmi PR. Feasibility of Mainstream Nitrite Oxidizing Bacteria Out-Selection and Anammox Polishing for Enhanced Nitrogen Removal. [Internet] [Doctoral dissertation]. Old Dominion University; 2014. [cited 2021 Jan 18].
Available from: 9781321346947 ; https://digitalcommons.odu.edu/cee_etds/60.
Council of Science Editors:
Regmi PR. Feasibility of Mainstream Nitrite Oxidizing Bacteria Out-Selection and Anammox Polishing for Enhanced Nitrogen Removal. [Doctoral Dissertation]. Old Dominion University; 2014. Available from: 9781321346947 ; https://digitalcommons.odu.edu/cee_etds/60
7.
Fergen, Pamela Sue.
Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process.
Degree: PhD, Mechanical Engineering, 2009, Old Dominion University
URL: 9781109566321
;
https://digitalcommons.odu.edu/mae_etds/118
► In the early stages of design when data availability is limited, engineers often times rely upon experience and regression analysis to select the most…
(more)
▼ In the early stages of design when data availability is limited, engineers often times rely upon experience and regression analysis to select the most suitable design equation among many competitive ones. This study presents an alternative that applies a modified Analytical Hierarchy Process (AHP) to select the most suitable design equation. The Analytical Hierarchy Process, a multi-criteria decision making method, has been utilized in the business and management world to collect and evaluate experts' opinions in order to arrive at a final decision. The Analytical Hierarchy Process employed here will treat each of the design equations as an expert and allow the decision maker to evaluate and weight the opinions of the experts. Selecting an impact pressure equation among seven semi-empirical and three classification societies' design equations for planing hull design is used as an example to facilitate the study presented in this dissertation.
The criteria and their associated weights that make up the decision making hierarchy of the Analytical Hierarchy Process are first established, with which the overall weighting coefficients can be computed to rank the candidate design equations. A preview sensitivity analysis is applied to screen out unfavorable design equations. The Analytical Hierarchy Process is then applied to select the most suitable impact pressure equation for twenty planing hulls. Next, a post sensitivity analysis is applied to ensure the robustness of the decision process. The results of such selection are compared with those of full scale test data. The implemented Analytical Hierarchy Process accurately selects the optimal pressure equation for fifteen of the twenty test cases. While it fails to select the best pressure design equation for the other five cases, it does provide recommendations that can lead to the selection of the right design equation.
This study has demonstrated that the Analytical Hierarchy Process holds potential to be effective not only in selecting a suitable pressure equation for planing hull design but also in finding the strengths and the weaknesses of each of the pressure equations under consideration.
Advisors/Committee Members: Gene Hou, Han Bao, Anthony Dean.
Subjects/Keywords: High-speed craft; Planing hull design; Pressure equation; Navel engineering; Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fergen, P. S. (2009). Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process. (Doctoral Dissertation). Old Dominion University. Retrieved from 9781109566321 ; https://digitalcommons.odu.edu/mae_etds/118
Chicago Manual of Style (16th Edition):
Fergen, Pamela Sue. “Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process.” 2009. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
9781109566321 ; https://digitalcommons.odu.edu/mae_etds/118.
MLA Handbook (7th Edition):
Fergen, Pamela Sue. “Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process.” 2009. Web. 18 Jan 2021.
Vancouver:
Fergen PS. Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process. [Internet] [Doctoral dissertation]. Old Dominion University; 2009. [cited 2021 Jan 18].
Available from: 9781109566321 ; https://digitalcommons.odu.edu/mae_etds/118.
Council of Science Editors:
Fergen PS. Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process. [Doctoral Dissertation]. Old Dominion University; 2009. Available from: 9781109566321 ; https://digitalcommons.odu.edu/mae_etds/118
8.
Hampton, Katrina R.
An Integrated Risk Analysis Methodology in a Multidisciplinary Design Environment.
Degree: PhD, Engineering Management, 2001, Old Dominion University
URL: 9780493565095
;
https://digitalcommons.odu.edu/emse_etds/158
► Design of complex, one-of-a-kind systems, such as space transportation systems, is characterized by high uncertainty and, consequently, high risk. It is necessary to account…
(more)
▼ Design of complex, one-of-a-kind systems, such as space transportation systems, is characterized by high uncertainty and, consequently, high risk. It is necessary to account for these uncertainties in the design process to produce systems that are more reliable. Systems designed by including uncertainties and managing them, as well, are more robust and less prone to poor operations as a result of parameter variability.
The quantification, analysis and mitigation of uncertainties are challenging tasks as many systems lack historical data. In such an environment, risk or uncertainty quantification becomes subjective because input data is based on professional judgment. Additionally, there are uncertainties associated with the analysis tools and models. Both the input data and the model uncertainties must be considered for a multi disciplinary systems level risk analysis.
This research synthesizes an integrated approach for developing a method for risk analysis. Expert judgment methodology is employed to quantify external risk. This methodology is then combined with a Latin Hypercube Sampling - Monte Carlo simulation to propagate uncertainties across a multidisciplinary environment for the overall system. Finally, a robust design strategy is employed to mitigate risk during the optimization process. This type of approach to risk analysis is conducive to the examination of quantitative risk factors.
The core of this research methodology is the theoretical framework for uncertainty propagation. The research is divided into three stages or modules. The first two modules include the identification/quantification and propagation of uncertainties. The third module involves the management of uncertainties or response optimization. This final module also incorporates the integration of risk into program decision-making.
The risk analysis methodology, is applied to a launch vehicle conceptual design study at NASA Langley Research Center. The launch vehicle multidisciplinary environment consists of the interface between configuration and sizing analysis outputs and aerodynamic parameter computations. Uncertainties are analyzed for both simulation tools and their associated input parameters. Uncertainties are then propagated across the design environment and a robust design optimization is performed over the range of a critical input parameter.
The results of this research indicate that including uncertainties into design processes may require modification of design constraints previously considered acceptable in deterministic analyses.
Advisors/Committee Members: Resit Unal, Paul Kauffmann, David Dryer, Han Bao, Arlene Moore.
Subjects/Keywords: Design environment; Expert judgment; Multidisciplinary; Risk analysis; Uncertainty; Risk Analysis; Structures and Materials; Systems Engineering and Multidisciplinary Design Optimization
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hampton, K. R. (2001). An Integrated Risk Analysis Methodology in a Multidisciplinary Design Environment. (Doctoral Dissertation). Old Dominion University. Retrieved from 9780493565095 ; https://digitalcommons.odu.edu/emse_etds/158
Chicago Manual of Style (16th Edition):
Hampton, Katrina R. “An Integrated Risk Analysis Methodology in a Multidisciplinary Design Environment.” 2001. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
9780493565095 ; https://digitalcommons.odu.edu/emse_etds/158.
MLA Handbook (7th Edition):
Hampton, Katrina R. “An Integrated Risk Analysis Methodology in a Multidisciplinary Design Environment.” 2001. Web. 18 Jan 2021.
Vancouver:
Hampton KR. An Integrated Risk Analysis Methodology in a Multidisciplinary Design Environment. [Internet] [Doctoral dissertation]. Old Dominion University; 2001. [cited 2021 Jan 18].
Available from: 9780493565095 ; https://digitalcommons.odu.edu/emse_etds/158.
Council of Science Editors:
Hampton KR. An Integrated Risk Analysis Methodology in a Multidisciplinary Design Environment. [Doctoral Dissertation]. Old Dominion University; 2001. Available from: 9780493565095 ; https://digitalcommons.odu.edu/emse_etds/158
9.
Luke, Stephen R.
A Conceptual Design Tool for Engineers: An Amalgamation of Theory of Constraints, Theory of Inventive Problem Solving and Logic.
Degree: PhD, Mechanical & Aerospace Engineering, 2002, Old Dominion University
URL: 9780493883717,
;
https://digitalcommons.odu.edu/mae_etds/256
► This research creates a design methodology by synthesizing three different design tools, the Theory of Inventive Problem Solving (TRIZ), the Theory of Constraints (TOC)…
(more)
▼ This research creates a design methodology by synthesizing three different design tools, the Theory of Inventive Problem Solving (TRIZ), the Theory of Constraints (TOC) and Logic. The basic approach of this design method is to: (1) Reduce a design problem to a logic diagram, (2) Code the inputs and outputs to determine desirability and degree of control, (3) Identify the best inputs to manipulate in order to obtain the desired outputs and (4) Exploit innovative algorithms developed in TRIZ to find the best ways to manipulate the chosen inputs.
This research integrates and expands the methods of TRIZ and TOC. It expands TOC by: (1) Expanding the levels of control from three to five, (2) Adding additional logical operators to the toolset and (3) Allowing for quantitative and qualitative variables to be treated as analog circuitry.
It expands TRIZ by: (1) Allowing for three levels of desirability (desirable, neutral and undesirable) instead of only two (useful and harmful), (2) Focusing the design area to keep the number of design solutions from increasing exponentially and (3) Allowing for logical operators to be used with the TRIZ toolset.
This dissertation integrates the strength of TRIZ (powerful innovative idea generation) with the strength of TOC (focused design) along with the strength of logical operators, In addition to providing a method, this research also provides a questionnaire to guide the designer through the methodology. This dissertation bangs the power of focused innovation to early design stages.
Advisors/Committee Members: Han Bao, Sebastian Bawab, Resit Unal, Keith M. Williamson.
Subjects/Keywords: Conceptual design; Logic; Theory of constraints; Theory of inventive problem solving; Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Luke, S. R. (2002). A Conceptual Design Tool for Engineers: An Amalgamation of Theory of Constraints, Theory of Inventive Problem Solving and Logic. (Doctoral Dissertation). Old Dominion University. Retrieved from 9780493883717, ; https://digitalcommons.odu.edu/mae_etds/256
Chicago Manual of Style (16th Edition):
Luke, Stephen R. “A Conceptual Design Tool for Engineers: An Amalgamation of Theory of Constraints, Theory of Inventive Problem Solving and Logic.” 2002. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
9780493883717, ; https://digitalcommons.odu.edu/mae_etds/256.
MLA Handbook (7th Edition):
Luke, Stephen R. “A Conceptual Design Tool for Engineers: An Amalgamation of Theory of Constraints, Theory of Inventive Problem Solving and Logic.” 2002. Web. 18 Jan 2021.
Vancouver:
Luke SR. A Conceptual Design Tool for Engineers: An Amalgamation of Theory of Constraints, Theory of Inventive Problem Solving and Logic. [Internet] [Doctoral dissertation]. Old Dominion University; 2002. [cited 2021 Jan 18].
Available from: 9780493883717, ; https://digitalcommons.odu.edu/mae_etds/256.
Council of Science Editors:
Luke SR. A Conceptual Design Tool for Engineers: An Amalgamation of Theory of Constraints, Theory of Inventive Problem Solving and Logic. [Doctoral Dissertation]. Old Dominion University; 2002. Available from: 9780493883717, ; https://digitalcommons.odu.edu/mae_etds/256
10.
Tang, Yongming.
Cultural Transposition: Exploring Meanings of and Strategies for Cross-Cultural Transfer of Organizational Practices.
Degree: PhD, Engineering Management, 1993, Old Dominion University
URL: https://digitalcommons.odu.edu/emse_etds/163
► The research objective is to study the phenomenon of transferring organizational practices which are conceptualized in one culture to another different culture. The purpose…
(more)
▼ The research objective is to study the phenomenon of transferring organizational practices which are conceptualized in one culture to another different culture. The purpose of the study is (1) to understand how cultural values and beliefs are manifested in behavior; (2) to explore how the Western organizational practices are interpreted and assimilated into an organization in an Eastern culture; and (3) to explore strategies for the fit between local cultural orientations and imported organizational practices. A qualitative, interpretive, and reflexive research methodology was developed to conduct this study.
The study was conducted in two phases. The first phase was designed to develop an indigenous perspective of the Chinese culture and behavior and to investigate the cultural interplays in the context of transferring organizational practices from the Western culture to the Chinese culture. This phase was mainly conducted in a large industrial organization in China, complemented by limited data collected from several other organizations. Three major social groups – the government, the management, and the employees – all of which have a major stake in the case organization were investigated by indepth interviews. This was to identify how each of them constructed their own realities, and how their realities were shared and in conflict with each other in the organizational context. Limited observation and document analysis were used to complement the interview findings. Cases where imported organizational practices were integrated with the Chinese culture were examined.
The second phase of the study was conducted in the USA. Cross-cultural informants – those Chinese who had both work experiences in the People's Republic of China (the PRC) and the USA and had a cross-cultural perspective were interviewed. This was designed to facilitate an understanding of the Chinese culture and behavior in the context of other cultures.
During the two phases of the study, a meta-research method was applied to observe the influence of the researcher upon the research process. The researcher's influence on the research data was examined.
A model for cross-cultural transfer of organizational practices was developed. Implications for the study of organization and culture, the construction of meanings in the context of cross-cultural transfer of organizational practices, organizational change in a cultural context, the case organization, and the development of Chinese organizational and management theories were examined. Suggestions for future research were also made.
Advisors/Committee Members: Barry Clemson, Tomoko Hamada, Frederick Steier, Han Bao.
Subjects/Keywords: China; United States; Cross-culture; Cultural transposition; Organizational practices; Operational Research; Organizational Behavior and Theory; Social and Cultural Anthropology
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tang, Y. (1993). Cultural Transposition: Exploring Meanings of and Strategies for Cross-Cultural Transfer of Organizational Practices. (Doctoral Dissertation). Old Dominion University. Retrieved from https://digitalcommons.odu.edu/emse_etds/163
Chicago Manual of Style (16th Edition):
Tang, Yongming. “Cultural Transposition: Exploring Meanings of and Strategies for Cross-Cultural Transfer of Organizational Practices.” 1993. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
https://digitalcommons.odu.edu/emse_etds/163.
MLA Handbook (7th Edition):
Tang, Yongming. “Cultural Transposition: Exploring Meanings of and Strategies for Cross-Cultural Transfer of Organizational Practices.” 1993. Web. 18 Jan 2021.
Vancouver:
Tang Y. Cultural Transposition: Exploring Meanings of and Strategies for Cross-Cultural Transfer of Organizational Practices. [Internet] [Doctoral dissertation]. Old Dominion University; 1993. [cited 2021 Jan 18].
Available from: https://digitalcommons.odu.edu/emse_etds/163.
Council of Science Editors:
Tang Y. Cultural Transposition: Exploring Meanings of and Strategies for Cross-Cultural Transfer of Organizational Practices. [Doctoral Dissertation]. Old Dominion University; 1993. Available from: https://digitalcommons.odu.edu/emse_etds/163
11.
Phairoh, Thongchai.
Passive and Active Nonlinear Control of Ship Roll Motions Using U-Tube Tanks.
Degree: PhD, Mechanical Engineering, 2006, Old Dominion University
URL: 9780542580383
;
https://digitalcommons.odu.edu/mae_etds/148
► A U-tube water tank is first designed to roll a ship floating on still water. The 6-degree of freedom (DOF) dynamic model of U-tube…
(more)
▼ A U-tube water tank is first designed to roll a ship floating on still water. The 6-degree of freedom (DOF) dynamic model of U-tube tank is derived and the effects of its parameters on ship roll motion are studied. Numerical simulations show that the U-tube tank is an effective stimulator to roll the ship on still water. For a rolling ship, the U-tube tank can be used as a damper to reduce ship roll motion quickly.
Active control of ship roll motion with a proportional and derivative (PD) controller, linear quadratic regulator (LQR), generalized predictive control (GPC), and deadbeat predictive control (DPC) is studied using a U-tube water tank as actuator is studied. For the predictive control, system identification is applied to update the parameters of the linear ship roll model with a U-tube tank when the ship dynamics changes. Numerical simulations show that GPC has the best performance and the U-tube tank is effective in ship roll mitigation.
Nonlinear ship roll mitigation with passive U-tube tank, U-tube tank using feedback linearization with completely known system parameters, and U-tube tank using adaptive fuzzy feedback linearization control with unknown system parameters, are also studied. In numerical simulation, a passive U-tube tank and feedback linearization help to reduce ship roll motion and capsizing compared to a ship without the U-tube tank. Feedback linearization is the most effective means of controlling ship roll motion, and adaptive feedback linearization is more effective than a passive U-tube tank.
Advisors/Committee Members: Jen-Kuang Huang, Han Bao, Gene Hou, Brett A. Newman.
Subjects/Keywords: Ship roll; Tanks; U-tube; Mechanical Engineering; Ocean Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Phairoh, T. (2006). Passive and Active Nonlinear Control of Ship Roll Motions Using U-Tube Tanks. (Doctoral Dissertation). Old Dominion University. Retrieved from 9780542580383 ; https://digitalcommons.odu.edu/mae_etds/148
Chicago Manual of Style (16th Edition):
Phairoh, Thongchai. “Passive and Active Nonlinear Control of Ship Roll Motions Using U-Tube Tanks.” 2006. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
9780542580383 ; https://digitalcommons.odu.edu/mae_etds/148.
MLA Handbook (7th Edition):
Phairoh, Thongchai. “Passive and Active Nonlinear Control of Ship Roll Motions Using U-Tube Tanks.” 2006. Web. 18 Jan 2021.
Vancouver:
Phairoh T. Passive and Active Nonlinear Control of Ship Roll Motions Using U-Tube Tanks. [Internet] [Doctoral dissertation]. Old Dominion University; 2006. [cited 2021 Jan 18].
Available from: 9780542580383 ; https://digitalcommons.odu.edu/mae_etds/148.
Council of Science Editors:
Phairoh T. Passive and Active Nonlinear Control of Ship Roll Motions Using U-Tube Tanks. [Doctoral Dissertation]. Old Dominion University; 2006. Available from: 9780542580383 ; https://digitalcommons.odu.edu/mae_etds/148
12.
Li, Haitao.
Computer-Aided Design of Coupler-Driven Watt I and Tolerance Synthesis for Four-Bar Linkages.
Degree: PhD, Mechanical & Aerospace Engineering, 1997, Old Dominion University
URL: 9780591603880
;
https://digitalcommons.odu.edu/mae_etds/195
► Theory to rectify circuit defects in rocker-crank and double-rocker at the synthesis level is described based on the angular joint displacements. It complements the…
(more)
▼ Theory to rectify circuit defects in rocker-crank and double-rocker at the synthesis level is described based on the angular joint displacements. It complements the crank-rocker and double-crank circuit rectification to complete the circuit rectification of four-bar linkages. The procedure utilizes the algebraic method where special points followed by a line construction procedure are employed to validate the range of the critical angle that can identify the circuit defects as a function of the design positions prior to the completion of the linkage.
A complete procedure of the rectified synthesis of the coupler-driven Watt I six-bar linkage to pass through the pre-defined four design positions is presented. This is done by de-coupling the six-bar mechanism as a coupler-driven and crank-driven four-bar linkages with common links. The vector component mechanism modeling method is applied to these linkages where the dyad and triad synthesis approaches are adopted in conjunction with the vector-algebraic method to find the solutions. The linkage with the coupler-driver is initially synthesized and rectified, then followed by the crank-driven four-bar linkage. The six-bar linkage is thus insured to assemble free of circuit, branch, and order defects. Optimization techniques are used to render the best solution linkages according to the specified design criteria. The process is coded and added to a mechanism design platform – RECSYN that allows a designer to synthesize coupler-driven Watt I linkages and the new circuit rectification theory is also applied in the program.
A methodology to determine the optimum link length tolerance and joint clearance distributions in four-bar linkages for motion generation with specified structural error in order to manufacture the linkages is proposed. A stochastic model incorporated with tolerances and clearances for four-bar motion generation is proposed. The statistical characteristics of the random variables in the model are discussed. The mechanical error of four-bar motion generation as a function of statistical properties of random variables is defined. The tolerances and clearances are obtained as a result of solving an optimization problem with the objective function of link length tolerances and joint clearances and structural error as constraints. A FORTRAN code is written based on the proposed theory and ADS is employed as an optimization design tool. With this program, optimum link length tolerance and joint clearance distribution can be computed when the user input the required linkage information and structural errors. Examples of assigning tolerance and clearance for four-bar motion generation are presented to demonstrate the application of the method.
Advisors/Committee Members: Sebastian Bawab, Han Bao, Gene J.-W. Hou, Jen-Kuang Huang.
Subjects/Keywords: Computer-aided design; Coupler-driven Watt I; Tolerance synthesis; Four-bar linkages; Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, H. (1997). Computer-Aided Design of Coupler-Driven Watt I and Tolerance Synthesis for Four-Bar Linkages. (Doctoral Dissertation). Old Dominion University. Retrieved from 9780591603880 ; https://digitalcommons.odu.edu/mae_etds/195
Chicago Manual of Style (16th Edition):
Li, Haitao. “Computer-Aided Design of Coupler-Driven Watt I and Tolerance Synthesis for Four-Bar Linkages.” 1997. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021.
9780591603880 ; https://digitalcommons.odu.edu/mae_etds/195.
MLA Handbook (7th Edition):
Li, Haitao. “Computer-Aided Design of Coupler-Driven Watt I and Tolerance Synthesis for Four-Bar Linkages.” 1997. Web. 18 Jan 2021.
Vancouver:
Li H. Computer-Aided Design of Coupler-Driven Watt I and Tolerance Synthesis for Four-Bar Linkages. [Internet] [Doctoral dissertation]. Old Dominion University; 1997. [cited 2021 Jan 18].
Available from: 9780591603880 ; https://digitalcommons.odu.edu/mae_etds/195.
Council of Science Editors:
Li H. Computer-Aided Design of Coupler-Driven Watt I and Tolerance Synthesis for Four-Bar Linkages. [Doctoral Dissertation]. Old Dominion University; 1997. Available from: 9780591603880 ; https://digitalcommons.odu.edu/mae_etds/195
. 
Open Access Theses and Dissertations