You searched for subject:(design of experiments).
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Cal Poly
1.
Lin, Yu-wei.
Benchmarked Hard Disk Drive Performance Characterization and Optimization Based on Design of Experiments Techniques.
Degree: MS, Electrical Engineering, 2010, Cal Poly
URL: https://digitalcommons.calpoly.edu/theses/350 
;
10.15368/theses.2010.116
► This paper describes an experimental study offered by Designs of Experiments (DOE) within the defined factor domains to evaluate the factor effects of simultaneous characteristics…
(more)
▼ This paper describes an experimental study offered by Designs of
Experiments (DOE) within the defined factor domains to evaluate the factor effects of simultaneous characteristics on the benchmarked hard disk drive performance by proposing well-organized statistical models for optimizations. The numerical relations of the obtained models permit to predict the behaviors of benchmarked disk performances as functions of significant factors to optimize relevant criteria based on the needs.
The experimental data sets were validated to be in satisfying agreement with predicted values by analyzing the response surface plots, contour plots, model equations, and optimization plots. The adequacy of the model equations were verified effectively by a prior generation disk drive within the same model family. The retained solutions for potential industrializations were the concluded response surface models of benchmarked disk performance optimizations.
The comprehensive benchmarked performance modeling procedure for hard disk drives not only saves experimental costs on physical modeling but also leads to hard-to-find quality improvement solutions to manufacturing decisions.
Advisors/Committee Members: John Y. Oliver.
Subjects/Keywords: design of experiments
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APA (6th Edition):
Lin, Y. (2010). Benchmarked Hard Disk Drive Performance Characterization and Optimization Based on Design of Experiments Techniques. (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/350 ; 10.15368/theses.2010.116
Chicago Manual of Style (16th Edition):
Lin, Yu-wei. “Benchmarked Hard Disk Drive Performance Characterization and Optimization Based on Design of Experiments Techniques.” 2010. Masters Thesis, Cal Poly. Accessed September 22, 2019.
https://digitalcommons.calpoly.edu/theses/350 ; 10.15368/theses.2010.116.
MLA Handbook (7th Edition):
Lin, Yu-wei. “Benchmarked Hard Disk Drive Performance Characterization and Optimization Based on Design of Experiments Techniques.” 2010. Web. 22 Sep 2019.
Vancouver:
Lin Y. Benchmarked Hard Disk Drive Performance Characterization and Optimization Based on Design of Experiments Techniques. [Internet] [Masters thesis]. Cal Poly; 2010. [cited 2019 Sep 22].
Available from: https://digitalcommons.calpoly.edu/theses/350 ; 10.15368/theses.2010.116.
Council of Science Editors:
Lin Y. Benchmarked Hard Disk Drive Performance Characterization and Optimization Based on Design of Experiments Techniques. [Masters Thesis]. Cal Poly; 2010. Available from: https://digitalcommons.calpoly.edu/theses/350 ; 10.15368/theses.2010.116
University of Manchester
2.
Brown, Liam John.
General Blending Models for Mixture Experiments: Design
and Analysis.
Degree: 2014, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:222351
► It is felt the position of the Scheffé polynomials as the primary, or sometimes sole recourse for practitioners of mixture experiments leads to a lack…
(more)
▼ It is felt the position of the Scheffé polynomials
as the primary, or sometimes sole recourse for practitioners of
mixture experiments leads to a lack of enquiry regarding the type
of blending behaviour that is used to describe the response and
that this could be detrimental to achieving experimental
objectives. Consequently, a new class of models and new
experimental designs are proposed allowing a more thorough
exploration of the experimental region with respect to different
blending behaviours, especially those not associated with
established models for mixtures, in particular the Scheffé
polynomials. The proposed General Blending Models for Mixtures
(GBMM) are a powerful tool allowing a broad range of blending
behaviour to be described. These include those of the Scheffé
polynomials (and its reparameterisations) and Becker's models. The
potential benefits to be gained from their application include
greater model parsimony and increased interpretability. Through
this class of models it is possible for a practitioner to reject
the assumptions inherent in choosing to model with the Scheffé
polynomials and instead adopt a more open approach, flexible to
many different types of behaviour. These models are presented
alongside a fitting procedure, implementing a stepwise regression
approach to the estimation of partially linear models with multiple
nonlinear terms. The new class of models has been used to develop
designs which allow the response surface to be explored fully with
respect to the range of blending behaviours the GBMM may describe.
These designs may additionally be targeted at exploring deviation
from the behaviour described by the established models. As such,
these designs may be thought to possess an enhanced optimality with
respect to these models. They both possess good properties with
respect to optimality criterion, but are also designed to be robust
against model uncertainty.
It is felt the position of the Scheffé polynomials
as the primary, or sometimes sole recourse for practitioners of
mixture experiments leads to a lack of enquiry regarding the type
of blending behaviour that is used to describe the response and
that this could be detrimental to achieving experimental
objectives. Consequently, a new class of models and new
experimental designs are proposed allowing a more thorough
exploration of the experimental region with respect to different
blending behaviours, especially those not associated with
established models for mixtures, in particular the Scheffé
polynomials. The proposed General Blending Models for Mixtures
(GBMM) are a powerful tool allowing a broad range of blending
behaviour to be described. These include those of the Scheffé
polynomials (and its reparameterisations) and Becker's models. The
potential benefits to be gained from their application include
greater model parsimony and increased interpretability. Through
this class of models it is possible for a practitioner to reject
the assumptions inherent in choosing to model with the Scheffé
polynomials and instead adopt a…
Advisors/Committee Members: TSO, MICHAEL MK, Tso, Michael, Donev, Alexander.
Subjects/Keywords: Mixture Experiments; Design of Experiments; Nonlinear Models
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APA (6th Edition):
Brown, L. J. (2014). General Blending Models for Mixture Experiments: Design
and Analysis. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:222351
Chicago Manual of Style (16th Edition):
Brown, Liam John. “General Blending Models for Mixture Experiments: Design
and Analysis.” 2014. Doctoral Dissertation, University of Manchester. Accessed September 22, 2019.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:222351.
MLA Handbook (7th Edition):
Brown, Liam John. “General Blending Models for Mixture Experiments: Design
and Analysis.” 2014. Web. 22 Sep 2019.
Vancouver:
Brown LJ. General Blending Models for Mixture Experiments: Design
and Analysis. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2019 Sep 22].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:222351.
Council of Science Editors:
Brown LJ. General Blending Models for Mixture Experiments: Design
and Analysis. [Doctoral Dissertation]. University of Manchester; 2014. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:222351
Rochester Institute of Technology
3.
Kumar, Pranay.
Experimental Design and Robust Regression.
Degree: MS, Industrial and Systems Engineering, 2017, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/9666
► Design of Experiments (DOE) is a very powerful statistical methodology, especially when used with linear regression analysis. The use of ordinary least squares (OLS)…
(more)
▼ Design of
Experiments (DOE) is a very powerful statistical methodology, especially when used with linear regression analysis. The use of ordinary least squares (OLS) estimation of linear regression parameters requires the errors to have a normal distribution. However, there are numerous situations when the error distribution is non-normal and using OLS can result in inaccurate parameter estimates. Robust regression is a useful and effective way to estimate the parameters of a regression model in the presence of non-normally distributed residuals. An extensive literature review suggests that there are limited studies comparing the performance of different robust estimators in conjunction with different experimental
design sizes, models, and error distributions. The research in this thesis is an attempt to bridge this gap. The performance of the popular robust estimators is compared over different experimental
design sizes, models, and error distributions and the results are presented and discussed. The results evaluating the performance of the robust estimator with OLS after performing Box-Cox transformation are also presented in this research.
Advisors/Committee Members: Rachel Silvestrini, Brian Thorn.
Subjects/Keywords: Design of experiments; Experimental design; Robust regression
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APA (6th Edition):
Kumar, P. (2017). Experimental Design and Robust Regression. (Masters Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/9666
Chicago Manual of Style (16th Edition):
Kumar, Pranay. “Experimental Design and Robust Regression.” 2017. Masters Thesis, Rochester Institute of Technology. Accessed September 22, 2019.
https://scholarworks.rit.edu/theses/9666.
MLA Handbook (7th Edition):
Kumar, Pranay. “Experimental Design and Robust Regression.” 2017. Web. 22 Sep 2019.
Vancouver:
Kumar P. Experimental Design and Robust Regression. [Internet] [Masters thesis]. Rochester Institute of Technology; 2017. [cited 2019 Sep 22].
Available from: https://scholarworks.rit.edu/theses/9666.
Council of Science Editors:
Kumar P. Experimental Design and Robust Regression. [Masters Thesis]. Rochester Institute of Technology; 2017. Available from: https://scholarworks.rit.edu/theses/9666
University of Manchester
4.
Brown, Liam John.
General blending models for mixture experiments : design and analysis.
Degree: PhD, 2014, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/general-blending-models-for-mixture-experiments-design-and-analysis(6ab3808d-7ceb-473b-bfef-68c613265f3e).html
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.617963
► It is felt the position of the Scheffé polynomials as the primary, or sometimes sole recourse for practitioners of mixture experiments leads to a lack…
(more)
▼ It is felt the position of the Scheffé polynomials as the primary, or sometimes sole recourse for practitioners of mixture experiments leads to a lack of enquiry regarding the type of blending behaviour that is used to describe the response and that this could be detrimental to achieving experimental objectives. Consequently, a new class of models and new experimental designs are proposed allowing a more thorough exploration of the experimental region with respect to different blending behaviours, especially those not associated with established models for mixtures, in particular the Scheffé polynomials. The proposed General Blending Models for Mixtures (GBMM) are a powerful tool allowing a broad range of blending behaviour to be described. These include those of the Scheffé polynomials (and its reparameterisations) and Becker's models. The potential benefits to be gained from their application include greater model parsimony and increased interpretability. Through this class of models it is possible for a practitioner to reject the assumptions inherent in choosing to model with the Scheffé polynomials and instead adopt a more open approach, flexible to many different types of behaviour. These models are presented alongside a fitting procedure, implementing a stepwise regression approach to the estimation of partially linear models with multiple nonlinear terms. The new class of models has been used to develop designs which allow the response surface to be explored fully with respect to the range of blending behaviours the GBMM may describe. These designs may additionally be targeted at exploring deviation from the behaviour described by the established models. As such, these designs may be thought to possess an enhanced optimality with respect to these models. They both possess good properties with respect to optimality criterion, but are also designed to be robust against model uncertainty.
Subjects/Keywords: 519.5; Mixture Experiments; Design of Experiments; Nonlinear Models
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brown, L. J. (2014). General blending models for mixture experiments : design and analysis. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/general-blending-models-for-mixture-experiments-design-and-analysis(6ab3808d-7ceb-473b-bfef-68c613265f3e).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.617963
Chicago Manual of Style (16th Edition):
Brown, Liam John. “General blending models for mixture experiments : design and analysis.” 2014. Doctoral Dissertation, University of Manchester. Accessed September 22, 2019.
https://www.research.manchester.ac.uk/portal/en/theses/general-blending-models-for-mixture-experiments-design-and-analysis(6ab3808d-7ceb-473b-bfef-68c613265f3e).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.617963.
MLA Handbook (7th Edition):
Brown, Liam John. “General blending models for mixture experiments : design and analysis.” 2014. Web. 22 Sep 2019.
Vancouver:
Brown LJ. General blending models for mixture experiments : design and analysis. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2019 Sep 22].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/general-blending-models-for-mixture-experiments-design-and-analysis(6ab3808d-7ceb-473b-bfef-68c613265f3e).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.617963.
Council of Science Editors:
Brown LJ. General blending models for mixture experiments : design and analysis. [Doctoral Dissertation]. University of Manchester; 2014. Available from: https://www.research.manchester.ac.uk/portal/en/theses/general-blending-models-for-mixture-experiments-design-and-analysis(6ab3808d-7ceb-473b-bfef-68c613265f3e).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.617963
Virginia Tech
5.
Weise, Peter Carl.
Mission-Integrated Synthesis/Design Optimization of Aerospace Subsystems under Transient Conditions.
Degree: MS, Mechanical Engineering, 2012, Virginia Tech
URL: http://hdl.handle.net/10919/76855
► The equations governing the thermodynamic behavior of a military aircraft have been implemented by the Air Force Research Lab (AFRL) and other Integrated Vehicle Energy…
(more)
▼ The equations governing the thermodynamic behavior of a military aircraft have been implemented by the Air Force Research Lab (AFRL) and other Integrated Vehicle Energy Technology Demonstration (INVENT) contributors into a cohesive, adaptable, dynamic aircraft simulation program in Mathworks' Simulink®. The resulting model known as the "Tip-to-tail" model meets the
design specifications set forth by the INVENT program. The system consists of six intimately linked subsystems that include a propulsion subsystem (PS), air vehicle subsystem (AVS), robust electrical power subsystem (REPS), high power electric actuation subsystem (HPEAS), advanced power and thermal management subsystem (APTMS), and a fuel thermal management subsystem (FTMS). The model's governing equations are augmented with experimental data and supported by defined physical parameters.
In order to address the problems associated with the additional power and thermal loads for in more electric aircraft (MEA), this research utilizes exergy analysis and mission-integrated synthesis/
design optimization to investigate the potential for improvement in tip-to-tail
design/performance. Additionally, this thesis describes the development and integration of higher fidelity transient heat exchanger models for use in the tip-to-tail.
Finally, the change in performance due to the integration of new heat exchanger models developed here is presented. Additionally, this thesis discusses the results obtained by performing mission-integrated synthesis/
design optimization on the tip-to-tail using heat exchanger
design parameters as decision variables. These results show that the performance of the tip-to-thermal management subsystems improves significantly due to the integration of the heat exchanger models. These results also show improvements in vehicle performance due to the mission-integrated optimization.
Advisors/Committee Members: von Spakovsky, Michael R. (committeechair), Kornhauser, Alan A. (committee member), O'Brien, Walter F. Jr. (committee member).
Subjects/Keywords: optimization; design of experiments; surrogate modeling; aerospace
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APA ·
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MLA ·
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APA (6th Edition):
Weise, P. C. (2012). Mission-Integrated Synthesis/Design Optimization of Aerospace Subsystems under Transient Conditions. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/76855
Chicago Manual of Style (16th Edition):
Weise, Peter Carl. “Mission-Integrated Synthesis/Design Optimization of Aerospace Subsystems under Transient Conditions.” 2012. Masters Thesis, Virginia Tech. Accessed September 22, 2019.
http://hdl.handle.net/10919/76855.
MLA Handbook (7th Edition):
Weise, Peter Carl. “Mission-Integrated Synthesis/Design Optimization of Aerospace Subsystems under Transient Conditions.” 2012. Web. 22 Sep 2019.
Vancouver:
Weise PC. Mission-Integrated Synthesis/Design Optimization of Aerospace Subsystems under Transient Conditions. [Internet] [Masters thesis]. Virginia Tech; 2012. [cited 2019 Sep 22].
Available from: http://hdl.handle.net/10919/76855.
Council of Science Editors:
Weise PC. Mission-Integrated Synthesis/Design Optimization of Aerospace Subsystems under Transient Conditions. [Masters Thesis]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/76855
KTH
6.
Seyedamin, Arvand.
FINDING IMPORTANT FACTORS IN AN EFFECTS-BASED PLAN USING SEQUENTIAL BIFURCATION.
Degree: Information and Communication Technology (ICT), 2012, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101212
► After the pilot phase of a simulation study, if the model contains many factors, then direct experimentation may need too much computer processing time,…
(more)
▼ After the pilot phase of a simulation study, if the model contains many factors, then direct experimentation may need too much computer processing time, therefore the purpose of screening simulation experiments is to eliminate negligible or unimportant factors of a simulation model in order to concentrate the efforts upon a short list of important factors. For this matter the Sequential bifurcation procedure developed by Bettonvil and Kleijnen [3] is an efficient and effective screening method which can be used. In this study, the Sequential bifurcation screening method is used to determine the important factors of a simulation based decision support model designed by The Swedish Defense Research Agency (FOI) meant for testing operational plans. By using this simulation model, a decision maker is able to test a number of feasible plans against possible courses of events. The sequential bifurcation procedure was applied and sorted the most important factors involved in this simulation model based on their relative importance.
Subjects/Keywords: Simulation; Screening; Sequential Bifurcation; Design of experiments.
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APA ·
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APA (6th Edition):
Seyedamin, A. (2012). FINDING IMPORTANT FACTORS IN AN EFFECTS-BASED PLAN USING SEQUENTIAL BIFURCATION. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101212
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):
Seyedamin, Arvand. “FINDING IMPORTANT FACTORS IN AN EFFECTS-BASED PLAN USING SEQUENTIAL BIFURCATION.” 2012. Thesis, KTH. Accessed September 22, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101212.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Seyedamin, Arvand. “FINDING IMPORTANT FACTORS IN AN EFFECTS-BASED PLAN USING SEQUENTIAL BIFURCATION.” 2012. Web. 22 Sep 2019.
Vancouver:
Seyedamin A. FINDING IMPORTANT FACTORS IN AN EFFECTS-BASED PLAN USING SEQUENTIAL BIFURCATION. [Internet] [Thesis]. KTH; 2012. [cited 2019 Sep 22].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101212.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Seyedamin A. FINDING IMPORTANT FACTORS IN AN EFFECTS-BASED PLAN USING SEQUENTIAL BIFURCATION. [Thesis]. KTH; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101212
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – Riverside
7.
Sheldon, David.
Design Space Exploration of Parameterized Systems using Design of Experiments.
Degree: Computer Science, 2011, University of California – Riverside
URL: http://www.escholarship.org/uc/item/1nc163dw
► Recent trends have led to parameterization of many computing components, such as parameterized processors, caches, FPGAs or networks-on-chip, as well as parameters in design tools…
(more)
▼ Recent trends have led to parameterization of many computing components, such as parameterized processors, caches, FPGAs or networks-on-chip, as well as parameters in design tools such as optimization flags. Tuning parameterized systems to meet design goals like performance, energy, size, or power, has become harder due to the enormous design space created by such parameters and due to the large time required to evaluate each system configuration. Previous design space exploration approaches for parameterized systems have either focused on custom or randomized search heuristics. We map such design space exploration onto a statistical paradigm known as Design of Experiments, a paradigm under development since the 1920s that uses methodical experiment selection and sophisticated analysis to obtain maximum information using a minimum number of experiments. We introduce our DPG (Design-of-experiments Pareto-point Generator) method that performs flexible exploration by allowing the designer to provide information about the number and types of parameters, the approximate time to evaluate a configuration, and the total allowable exploration time. From that information, DPG automatically determines a custom set of experiments to best explore the design space within the allowable time. Such customized design-of-experiments-based exploration represents the unique contribution of this work. We show that DPG provides competitive results across different domains, without requiring the designer to have a detailed understanding of parameter impacts. We created a web-based DPG tool to support designers from various domains, which accepts information from the designer and generates experiments that the designer conducts (iteratively), and generates data and plots from the analysis, including Pareto-points. The effectiveness of the DoE paradigm for system tuning may have broad applicability for design automation.
Subjects/Keywords: Computer science; Application-Specific tuning; Design of Experiments; Design Space Exploration
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sheldon, D. (2011). Design Space Exploration of Parameterized Systems using Design of Experiments. (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/1nc163dw
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):
Sheldon, David. “Design Space Exploration of Parameterized Systems using Design of Experiments.” 2011. Thesis, University of California – Riverside. Accessed September 22, 2019.
http://www.escholarship.org/uc/item/1nc163dw.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sheldon, David. “Design Space Exploration of Parameterized Systems using Design of Experiments.” 2011. Web. 22 Sep 2019.
Vancouver:
Sheldon D. Design Space Exploration of Parameterized Systems using Design of Experiments. [Internet] [Thesis]. University of California – Riverside; 2011. [cited 2019 Sep 22].
Available from: http://www.escholarship.org/uc/item/1nc163dw.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sheldon D. Design Space Exploration of Parameterized Systems using Design of Experiments. [Thesis]. University of California – Riverside; 2011. Available from: http://www.escholarship.org/uc/item/1nc163dw
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Rochester Institute of Technology
8.
Little, Rory W.
Advancing implementation conditions of optimal experimental design for dual response systems using one continuous response and one binary response.
Degree: MS, Industrial and Systems Engineering, 2019, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/10017
► Optimal designs are computer-generated experimental designs that provide an experimenter with an ‘optimal’ set of experimental trials. Historically, optimal experimental design has been limited…
(more)
▼ Optimal designs are computer-generated experimental designs that provide an experimenter with an ‘optimal’ set of experimental trials. Historically, optimal experimental
design has been limited to optimization with regards to a single criterion for a single response variable. Recent research by Burke et al. (2017) made it possible to create a dual response optimal designs for cases involving
experiments with one continuous response and one binary response. The algorithm in Burke et al. (2017) provides a series of weighted optimal designs across a range of weights between the continuous and binary response cases. This thesis extends the work by Burke et al. (2017) in three ways. First, a new optimality criterion is developed in order to provide more stable algorithm results. Second, a method for selecting the weighted
design that provides the best results for the continuous and binary cases is developed. Finally, a sensitivity analysis on the prior information required to generate the optimal designs in performed.
Advisors/Committee Members: Rachel Silvestrini, Katie McConky.
Subjects/Keywords: Design of experiments; Dual response; Experimental design; Optimal
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APA ·
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MLA ·
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Manager
APA (6th Edition):
Little, R. W. (2019). Advancing implementation conditions of optimal experimental design for dual response systems using one continuous response and one binary response. (Masters Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/10017
Chicago Manual of Style (16th Edition):
Little, Rory W. “Advancing implementation conditions of optimal experimental design for dual response systems using one continuous response and one binary response.” 2019. Masters Thesis, Rochester Institute of Technology. Accessed September 22, 2019.
https://scholarworks.rit.edu/theses/10017.
MLA Handbook (7th Edition):
Little, Rory W. “Advancing implementation conditions of optimal experimental design for dual response systems using one continuous response and one binary response.” 2019. Web. 22 Sep 2019.
Vancouver:
Little RW. Advancing implementation conditions of optimal experimental design for dual response systems using one continuous response and one binary response. [Internet] [Masters thesis]. Rochester Institute of Technology; 2019. [cited 2019 Sep 22].
Available from: https://scholarworks.rit.edu/theses/10017.
Council of Science Editors:
Little RW. Advancing implementation conditions of optimal experimental design for dual response systems using one continuous response and one binary response. [Masters Thesis]. Rochester Institute of Technology; 2019. Available from: https://scholarworks.rit.edu/theses/10017
Colorado State University
9.
Cortés-Mestres, Luis A.
Second-order sub-array Cartesian product split-plot design.
Degree: PhD, Mechanical Engineering, 2015, Colorado State University
URL: http://hdl.handle.net/10217/167248
► Fisher (1926) laid down the fundamental principles of design of experiments: factorization, replication, randomization, and local control of error. In industrial experiments, however, departure from…
(more)
▼ Fisher (1926) laid down the fundamental principles of
design of
experiments: factorization, replication, randomization, and local control of error. In industrial
experiments, however, departure from these principles is commonplace. Many industrial
experiments involve situations in which complete randomization may not be feasible because the factor level settings are impractical or inconvenient to change, the resources available to complete the experiment in homogenous settings are limited, or both. Restricted randomization due to factor levels that are impractical or inconvenient to change can lead to a split-plot experiment. Restricted randomization due to resource limitation can lead to blocking. Situations that require fitting a second-order model under those conditions lead to a second-order block split-plot experiment. Although response surface methodology has experienced a phenomenal growth since Box and Wilson (1951), the departure from standard methods to tackle second-order block split-plot
design remains, for the most part, unexplored. Most graduate textbooks only provide a relatively basic treatise of the
subject. Peer-reviewed literature is scarce, has a limited number of examples, and provides guidelines that often are too general. This deficit of information leaves practitioners ill prepared to face the roadblocks illuminated by Simpson, Kowalski, and Landman (2004). Practical strategies to help practitioners in dealing with the challenges presented by second-order block split-plot
design are provided, including an end-to-end, innovative approach for the construction of a new form of effective and efficient response surface
design referred to as second-order sub-array Cartesian product split-plot
design. This new form of
design is an alternative to ineffective split-plot designs that are currently in use by the manufacturing and quality control community. The
design is economical, the prediction variance of the regression coefficients is low and stable, and the aliasing between the terms in the model and effects that are not in the model as well as the correlation between similar effects that are not in the model is low. Based on an assessment using well-accepted key
design evaluation criterion, it is demonstrated that second-order sub-array Cartesian product split-plot designs perform as well or better than historical designs that have been considered standards up to this point.
Advisors/Committee Members: Duff, William S. (advisor), Simpson, James R. (advisor), Chong, Edwin K. P. (committee member), Bradley, Thomas H. (committee member), Jathar, Shantanu H. (committee member).
Subjects/Keywords: response surface methodology; split-plot design; restricted randomization; design of experiments
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APA (6th Edition):
Cortés-Mestres, L. A. (2015). Second-order sub-array Cartesian product split-plot design. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/167248
Chicago Manual of Style (16th Edition):
Cortés-Mestres, Luis A. “Second-order sub-array Cartesian product split-plot design.” 2015. Doctoral Dissertation, Colorado State University. Accessed September 22, 2019.
http://hdl.handle.net/10217/167248.
MLA Handbook (7th Edition):
Cortés-Mestres, Luis A. “Second-order sub-array Cartesian product split-plot design.” 2015. Web. 22 Sep 2019.
Vancouver:
Cortés-Mestres LA. Second-order sub-array Cartesian product split-plot design. [Internet] [Doctoral dissertation]. Colorado State University; 2015. [cited 2019 Sep 22].
Available from: http://hdl.handle.net/10217/167248.
Council of Science Editors:
Cortés-Mestres LA. Second-order sub-array Cartesian product split-plot design. [Doctoral Dissertation]. Colorado State University; 2015. Available from: http://hdl.handle.net/10217/167248
University of Tennessee – Knoxville
10.
Weese, Maria.
A New Screening Methodology for Mixture Experiments.
Degree: 2010, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_graddiss/757
► Many materials we use in daily life are comprised of a mixture; plastics, gasoline, food, medicine, etc. Mixture experiments, where factors are proportions of components…
(more)
▼ Many materials we use in daily life are comprised of a mixture; plastics, gasoline, food, medicine, etc. Mixture experiments, where factors are proportions of components and the response depends only on the relative proportions of the components, are an integral part of product development and improvement. However, when the number of components is large and there are complex constraints, experimentation can be a daunting task. We study screening methods in a mixture setting using the framework of the Cox mixture model [1]. We exploit the easy interpretation of the parameters in the Cox mixture model and develop methods for screening in a mixture setting. We present specific methods for adding a component, removing a component and a general method for screening a subset of components in mixtures with complex constraints. The variances of our parameter estimates are comparable with the typically used Scheff ́e model variances and our methods provide a reduced run size for screening experiments with mixtures containing a large number of components. We then further extend the new screening methods by using Evolutionary Operation (EVOP) developed by Box and Draper [2]. EVOP methods use small movement in a subset of process parameters and replication to reveal effects out of the process noise. Mixture experiments inherently have small movements (since the proportions can only range from zero to unity) and the effects have large variances. We update the EVOP methods by using sequential testing of effects opposed to the confidence interval method originally proposed by Box and Draper. We show that the sequential testing approach as compared with a fixed sample size reduced the required sample size as much as 50 percent with all other testing parameters held constant. We present two methods for adding a component and a general screening method using a graphical sequential t-test and provide R-code to reproduce the limits for the test.
Subjects/Keywords: mixture experiments; screening; Cox model; Applied Statistics; Design of Experiments and Sample Surveys; Statistical Methodology
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Chicago ·
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APA (6th Edition):
Weese, M. (2010). A New Screening Methodology for Mixture Experiments. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/757
Chicago Manual of Style (16th Edition):
Weese, Maria. “A New Screening Methodology for Mixture Experiments.” 2010. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed September 22, 2019.
https://trace.tennessee.edu/utk_graddiss/757.
MLA Handbook (7th Edition):
Weese, Maria. “A New Screening Methodology for Mixture Experiments.” 2010. Web. 22 Sep 2019.
Vancouver:
Weese M. A New Screening Methodology for Mixture Experiments. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2010. [cited 2019 Sep 22].
Available from: https://trace.tennessee.edu/utk_graddiss/757.
Council of Science Editors:
Weese M. A New Screening Methodology for Mixture Experiments. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2010. Available from: https://trace.tennessee.edu/utk_graddiss/757
Georgia Tech
11.
Gu, Li.
Minimum energy designs: Extensions, algorithms, and applications.
Degree: PhD, Industrial and Systems Engineering, 2016, Georgia Tech
URL: http://hdl.handle.net/1853/55668
► Minimum Energy Design (MED) is a recently proposed technique for generating deterministic samples from any arbitrary probability distribution. Most space-filling designs look for uniformity in…
(more)
▼ Minimum Energy
Design (MED) is a recently proposed technique for generating deterministic samples from any arbitrary probability distribution. Most space-filling designs look for uniformity in the region of interest. In MED, some weights are assigned in the optimal
design criterion so that some areas are preferred over the other areas. With a proper choice of the weights, the MED can asymptotically represent the target distribution. In this dissertation, we improve and extend MED in three different aspects. In Chapter 1, we propose an efficient approach that uses MED to construct proposals for an independence sampler in Monte Carlo Markov Chain (MCMC). Between two adjacent temperatures, MED points are selected to keep and transfer the mixing information. In Chapter 2, when evaluations on the posterior distribution become expensive, traditional MC/MCMC methods are infeasible because of the requirement of large samples. MED is a good way to overcome this problem. It can be viewed as a ``deterministic’’ sampling method that avoids repeated sampling in the same places, which dramatically decreases the number of required samples. The MED criterion is generalized and a fast construction algorithm is developed. Finally, in Chapter 3, we propose a new type of MEDs and a new modeling method for robust parameter
design in computer
experiments. In the
design part, a new
design based on the generalized MED criterion is proposed, where different tuning parameters are used for control and noise factors. In the modeling part, we propose a simple but efficient nonstationary Gaussian process that takes into account of the experimental
design structure.
Advisors/Committee Members: Vengazhiyil, Roshan (advisor), Wu, Jeff (advisor), Haaland, Benjamin (committee member), Vidakovic, Brani (committee member), Myers, William (committee member).
Subjects/Keywords: Minimum energy design; Design of experiments; Monte Carlo Markov chain; Robust parameter design; Computer experiments; Gaussian process model
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APA ·
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Manager
APA (6th Edition):
Gu, L. (2016). Minimum energy designs: Extensions, algorithms, and applications. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/55668
Chicago Manual of Style (16th Edition):
Gu, Li. “Minimum energy designs: Extensions, algorithms, and applications.” 2016. Doctoral Dissertation, Georgia Tech. Accessed September 22, 2019.
http://hdl.handle.net/1853/55668.
MLA Handbook (7th Edition):
Gu, Li. “Minimum energy designs: Extensions, algorithms, and applications.” 2016. Web. 22 Sep 2019.
Vancouver:
Gu L. Minimum energy designs: Extensions, algorithms, and applications. [Internet] [Doctoral dissertation]. Georgia Tech; 2016. [cited 2019 Sep 22].
Available from: http://hdl.handle.net/1853/55668.
Council of Science Editors:
Gu L. Minimum energy designs: Extensions, algorithms, and applications. [Doctoral Dissertation]. Georgia Tech; 2016. Available from: http://hdl.handle.net/1853/55668
Virginia Tech
12.
Allison, Darcy L.
Multidisciplinary Analysis and Design Optimization of an Efficient Supersonic Air Vehicle.
Degree: PhD, Aerospace Engineering, 2013, Virginia Tech
URL: http://hdl.handle.net/10919/24187
► This work seeks to develop multidisciplinary design optimization (MDO) methods to find the optimal design of a particular aircraft called an Efficient Supersonic Air Vehicle…
(more)
▼ This work seeks to develop multidisciplinary
design optimization (MDO) methods to find the optimal
design of a particular aircraft called an Efficient Supersonic Air Vehicle (ESAV). This is a long-range military bomber type of aircraft that is to be designed for high speed (supersonic) flight and survivability. The
design metric used to differentiate designs is minimization of the take-off gross weight.
The usefulness of MDO tools, rather than compartmentalized
design practices, in the early stages of the
design process is shown. These tools must be able to adequately analyze all pertinent physics, simultaneously and collectively, that are important to the aircraft of interest.
Low-fidelity and higher-fidelity ESAV MDO frameworks have been constructed. The analysis codes in the higher-fidelity framework were validated by comparison with the legacy B-58 supersonic bomber aircraft. The low-fidelity framework used a computationally expensive process that utilized a large
design of computer
experiments study to explore its
design space. This resulted in identifying an optimal ESAV with an arrow wing planform. Specific challenges to designing an ESAV not addressed with the low-fidelity framework were addressed with the higher-fidelity framework. Specifically, models to characterize the effects of the low-observable ESAV characteristics were required. For example, the embedded engines necessitated a higher-fidelity propulsion model and engine exhaust-washed structures discipline. Low-observability requirements necessitated adding a radar cross section discipline.
A relatively less costly computational process utilizing successive NSGA-II optimization runs was used for the higher-fidelity MDO. This resulted in an optimal ESAV with a trapezoidal wing planform. The NSGA-II optimizer considered arrow wing planforms in early generations during the process, but these were later discarded in favor of the trapezoidal planform. Sensitivities around this optimal
design were computed using the well-known ANOVA method to characterize the surrounding
design space.
The lower and higher fidelity frameworks could not be combined in a mixed-fidelity optimization process because the low-fidelity was not faithful enough to the higher-fidelity analysis results. The low-fidelity optimum was found to be infeasible according to the higher-fidelity framework and vice versa. Therefore, the low-fidelity framework was not capable of guiding the higher-fidelity framework to the eventual trapezoidal planform optimum.
Advisors/Committee Members: Canfield, Robert A. (committee member), Burns, John A. (committee member), Schetz, Joseph A. (committeecochair), Kapania, Rakesh K. (committeecochair).
Subjects/Keywords: aircraft design; multidisciplinary design optimization; supersonic military aircraft; design of computer experiments
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Manager
APA (6th Edition):
Allison, D. L. (2013). Multidisciplinary Analysis and Design Optimization of an Efficient Supersonic Air Vehicle. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/24187
Chicago Manual of Style (16th Edition):
Allison, Darcy L. “Multidisciplinary Analysis and Design Optimization of an Efficient Supersonic Air Vehicle.” 2013. Doctoral Dissertation, Virginia Tech. Accessed September 22, 2019.
http://hdl.handle.net/10919/24187.
MLA Handbook (7th Edition):
Allison, Darcy L. “Multidisciplinary Analysis and Design Optimization of an Efficient Supersonic Air Vehicle.” 2013. Web. 22 Sep 2019.
Vancouver:
Allison DL. Multidisciplinary Analysis and Design Optimization of an Efficient Supersonic Air Vehicle. [Internet] [Doctoral dissertation]. Virginia Tech; 2013. [cited 2019 Sep 22].
Available from: http://hdl.handle.net/10919/24187.
Council of Science Editors:
Allison DL. Multidisciplinary Analysis and Design Optimization of an Efficient Supersonic Air Vehicle. [Doctoral Dissertation]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/24187
Iowa State University
13.
Marget, Wilmina Mary.
Experimental designs for multiple responses with different models.
Degree: 2015, Iowa State University
URL: https://lib.dr.iastate.edu/etd/14941
► Central composite designs [Box and Wilson (1951)] and Box-Behnken designs [Box and Behnken (1960)] are both widely accepted and used experimental designs for fitting second…
(more)
▼ Central composite designs [Box and Wilson (1951)] and Box-Behnken designs [Box and Behnken (1960)] are both widely accepted and used experimental designs for fitting second order polynomial models in response surface methods. However, these designs are based only on the number of explanatory variables (factors) that are being investigated, and do not take into account any prior information about the system being investigated. In a multivariate problem where prior information is available in the form of a screening experiment or previous process knowledge, investigators often know which factors will be used in the estimation of each response. This work presents alternative designs based on central composite designs and Box-Behnken designs that result in fewer required runs, saving investigators both time and money, by taking this prior information into account.
Subjects/Keywords: Statistics; Box-Behnken Design; Central Composite Design; Design of experiments; Statistics and Probability
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Marget, W. M. (2015). Experimental designs for multiple responses with different models. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/14941
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):
Marget, Wilmina Mary. “Experimental designs for multiple responses with different models.” 2015. Thesis, Iowa State University. Accessed September 22, 2019.
https://lib.dr.iastate.edu/etd/14941.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Marget, Wilmina Mary. “Experimental designs for multiple responses with different models.” 2015. Web. 22 Sep 2019.
Vancouver:
Marget WM. Experimental designs for multiple responses with different models. [Internet] [Thesis]. Iowa State University; 2015. [cited 2019 Sep 22].
Available from: https://lib.dr.iastate.edu/etd/14941.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Marget WM. Experimental designs for multiple responses with different models. [Thesis]. Iowa State University; 2015. Available from: https://lib.dr.iastate.edu/etd/14941
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
14.
Bartz-Beielstein, Thomas.
New experimentalism applied to
evolutionary computation.
Degree: 2005, Universität Dortmund
URL: http://hdl.handle.net/2003/21461
► This thesis develops a solid statistical methodology to analyze search heuristics such as evolutionary algorithm s based on the concept of the new experimentalism. The…
(more)
▼ This thesis develops a solid
statistical methodology to analyze search heuristics such as
evolutionary algorithm s based on the concept of the new
experimentalism. The new experimentalism is an influential
discipline in the modern philosophy of science. The new
experimentalists are seeking for a relatively secure basis for
science, not in theory or observation, but in experiment. Deborah
Mayo - one of its prominent proponents - developed a detailed way
in which sc ientific claims can be validated by experiment. First,
the concept of the new experimentalism for computer
experiments is
introduced. The difference between significant and meani ngful
results is detailed. Following Mayo, a re-interpretation of the
Neyman-Pearson theory of testing for computer
experiments is given.
Since statistical tests can be used as l earning tools, they
provide means to extend widely accepted popperian paradigms. Models
are characterized as central elements of science. We claim that
experiment dominates theor y. Many, even conflicting, theories can
co-exist independently for one unique experimental result. Maybe
there is no theory applying to every phenomenon, but many simple
theories describing what happens from case to case. Basic
definitions from computational statistics, classical
design of
experiments (DOE), and modern
design of computer
experiments (DAC
E) are explained to provide the reader with the required background
information from statistics. An elevator group control model, which
has been developed in cooperation with one of the world's leading
elevator manufacturers, is introduced as an example for complex
real-world optimization problems. It is used to illustrate the
difference between art ificial functions from test suites and
real-world problems. Problems related to these commonly used
test-suites are discussed. Experimenters have to decide where to
place sample points. Classical and modern experimental designs are
compared to describe the difference between space-filling designs
and designs that place experimental points at the boundari es of
the experimental region. In many situations, it might be beneficial
to generate the
design points not at once, but sequentially. A
sequential
design, which provides a basis for a parameter tuning
method, is developed. Exogenous strategy parameters, which have to
be specified before an optimization algorithm can be started, are
presented for determi nistic and stochastic search algorithms. The
discussion of the concept of optimization provides the foundation
to define performance measures for search heuristics. Optimization
relies on a number of very restrictive assumptions that are not met
in many real-world settings. Efficiency and effectivity are
introduced with respect to these problems as two i mportant
categories to classify performance measures. As the pre-requisites
have been introduced,
experiments can be performed and analyzed in
framework of the new experimentalis m. A classical approach, based
on DOE, is presented first. Then, sequential parameter
optimization…
Advisors/Committee Members: Schwefel, Hans-Paul.
Subjects/Keywords: Beschränkte Rationalität;
bounded rationality; computational statistics; DACE; DACE; Design
and analysis of computer experiments; design and analysis of
experiments; Design of experiments; design of experiments; DOE;
DOE; Evolutionäre Algorithmen; evolutionary algorithms; Experiment;
Neuer Experimentalismus; new experimentalism; Optimierung;
004
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APA ·
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Manager
APA (6th Edition):
Bartz-Beielstein, T. (2005). New experimentalism applied to
evolutionary computation. (Thesis). Universität Dortmund. Retrieved from http://hdl.handle.net/2003/21461
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):
Bartz-Beielstein, Thomas. “New experimentalism applied to
evolutionary computation.” 2005. Thesis, Universität Dortmund. Accessed September 22, 2019.
http://hdl.handle.net/2003/21461.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bartz-Beielstein, Thomas. “New experimentalism applied to
evolutionary computation.” 2005. Web. 22 Sep 2019.
Vancouver:
Bartz-Beielstein T. New experimentalism applied to
evolutionary computation. [Internet] [Thesis]. Universität Dortmund; 2005. [cited 2019 Sep 22].
Available from: http://hdl.handle.net/2003/21461.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bartz-Beielstein T. New experimentalism applied to
evolutionary computation. [Thesis]. Universität Dortmund; 2005. Available from: http://hdl.handle.net/2003/21461
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
15.
Nunes, Marcus Alexandre.
Analysis of RNA-Seq Data with Excess of Zeros.
Degree: PhD, Statistics, 2013, Penn State University
URL: https://etda.libraries.psu.edu/catalog/18932
► Next-generation sequencing technologies are revolutionizing the analysis of genomics data. Also called massively parallel signature sequencing (MPSS), these methods generate large amounts of data by…
(more)
▼ Next-generation sequencing technologies are
revolutionizing the analysis of genomics data. Also called
massively parallel signature sequencing (MPSS), these methods
generate large amounts of data by generating and identifying
millions of short sequences of genetic code. These short sequences
are aligned to a reference genome and the number of occurrences of
reads in each gene is counted. The counts obtained from this
procedure are used to define the digital expression of the genes.
However, a large portion of these counts are zeros. The
conventional Generalized Linear Model used to test differential
expression in RNA-Seq data are not capable of dealing with this
issue satisfactorily. In this work we propose a method capable of
handling this characteristic of genomic data by using the Hurdle
model. We fit Hurdle models to count data from next-gen sequencing
sources and we develop a Likelihood Ratio Test to compare the fits
of two of these models in order to decide which one better fits the
data. We also derive near-optimal designs for these models, using a
variation of the exchange algorithm. We present simulation results
to demonstrate the performance of our proposed method and compare
it to current methods. In order to gain an understanding of the
method characteristics, several cases, with different parameters,
are analyzed. To assess the power and the asymptotic behavior of
our test, we simulate simple examples where the gene counts do not
belong to a genomic dataset. However, to evaluate how our method
performs in real world applications, we simulate datasets that
resemble real counts from RNA-Seq experiments. Moreover, we compare
our method to a well known differential gene expression method from
the literature.
Subjects/Keywords: generalized linear models; RNA-Seq; design of experiments;
optimal
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nunes, M. A. (2013). Analysis of RNA-Seq Data with Excess of Zeros. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/18932
Chicago Manual of Style (16th Edition):
Nunes, Marcus Alexandre. “Analysis of RNA-Seq Data with Excess of Zeros.” 2013. Doctoral Dissertation, Penn State University. Accessed September 22, 2019.
https://etda.libraries.psu.edu/catalog/18932.
MLA Handbook (7th Edition):
Nunes, Marcus Alexandre. “Analysis of RNA-Seq Data with Excess of Zeros.” 2013. Web. 22 Sep 2019.
Vancouver:
Nunes MA. Analysis of RNA-Seq Data with Excess of Zeros. [Internet] [Doctoral dissertation]. Penn State University; 2013. [cited 2019 Sep 22].
Available from: https://etda.libraries.psu.edu/catalog/18932.
Council of Science Editors:
Nunes MA. Analysis of RNA-Seq Data with Excess of Zeros. [Doctoral Dissertation]. Penn State University; 2013. Available from: https://etda.libraries.psu.edu/catalog/18932
Penn State University
16.
Perez, Peter Larry.
EFFECTS OF THE CHEMICAL STRUCTURE AND COMPOSITION ON THE
CONTROLLED AUTOIGNITION OF HYDROCARBON FUELS.
Degree: PhD, Fuel Science, 2010, Penn State University
URL: https://etda.libraries.psu.edu/catalog/11447
► This dissertation presents the results from the studies on the effects of the chemical structure and the relative concentration of the components on the autoignition…
(more)
▼ This dissertation presents the results from the
studies on the effects of the chemical structure and the
relative concentration of the components on the autoignition
behavior of hydrocarbon mixtures. An experimental matrix with 21
surrogate gasoline fuels formulated with n-heptane, isooctane,
methylcyclohexane, toluene and 1-hexene as an augmented
simplex-lattice mixture design was used to carry out measurements
of the ignition delay in an Ignition Quality Tester (IQT) and HCCI
combustion experiments in a Ricardo Hydra single-cylinder research
engine. The statistical modeling relied on the use of
Scheffé polynomials to relate the response variables to
the compositional data, which allowed the quantification
of the main effects as well as the binary interactions
among fuel components. The experiments in the IQT showed that
n-heptane, toluene and isooctane had the strongest blending
effects on the ignition delay of hydrocarbon mixtures
while the blending effects of methylcyclohexane and
1-hexene were almost null, although 1-hexene was more reactive. The
statistical modeling of the ignition delay data indicated strong
synergistic interactions in the n-heptane/isooctane blend,
manifested as increased rates of heat release compared to the pure
components, and antagonistic interactions between isooctane and
toluene, manifested as long ignition delays. These
effects were also observed in the modified CFR
engine experiments, which proved that the NTC behavior observed
with the pure components was absent in the n-heptane/isooctane
binary mixture, while the antagonistic interaction observed in the
isooctane/toluene blend resulted from the suppression of the
low-temperature chemistry of isooctane in the presence of toluene.
Strong effects of the fuel chemistry were also evident in
the HCCI experiments in the Ricardo Hydra engine, where the
performance was measured in terms of thermal efficiency
(ηf), combustion phasing as crank angle for 50 % heat
release (CA50), burning rate as maximum pressure rise rate (MPRR),
indicated mean effective pressure (IMEP) and its
coefficient of variation (COV) and
brake-specific unburned hydrocarbons (HC) and carbon
monoxide (CO) emissions. The blends rich in isooctane (60 %
isooctane, 10 % n-heptane, 10 % methylcyclohexane, 10 % toluene, 10
% 1-hexene) and rich in methylcyclohexane (60 % methylcyclohexane,
10 % n-heptane, 10 % isooctane, 10 % toluene, 10 % 1-hexene) showed
the best performance as measured by the performance parameters. The
sensitivity analysis showed that fuel effects are as
important as the changes in operational conditions (engine speed,
intake air temperature) on thermal efficiency, combustion
phasing and burning rate, but IMEP was mostly affected by
the operational parameters. The results showed the best performance
for the blends with 60 % volume of methylcyclohexane or 60 % of
1-hexene, for which the thermal efficiency, combustion
phasing and burning rates changed the…
Subjects/Keywords: Design of Experiments; HCCI; Fuel Chemistry; Autoignition;
Statistical Analysis
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Perez, P. L. (2010). EFFECTS OF THE CHEMICAL STRUCTURE AND COMPOSITION ON THE
CONTROLLED AUTOIGNITION OF HYDROCARBON FUELS. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/11447
Chicago Manual of Style (16th Edition):
Perez, Peter Larry. “EFFECTS OF THE CHEMICAL STRUCTURE AND COMPOSITION ON THE
CONTROLLED AUTOIGNITION OF HYDROCARBON FUELS.” 2010. Doctoral Dissertation, Penn State University. Accessed September 22, 2019.
https://etda.libraries.psu.edu/catalog/11447.
MLA Handbook (7th Edition):
Perez, Peter Larry. “EFFECTS OF THE CHEMICAL STRUCTURE AND COMPOSITION ON THE
CONTROLLED AUTOIGNITION OF HYDROCARBON FUELS.” 2010. Web. 22 Sep 2019.
Vancouver:
Perez PL. EFFECTS OF THE CHEMICAL STRUCTURE AND COMPOSITION ON THE
CONTROLLED AUTOIGNITION OF HYDROCARBON FUELS. [Internet] [Doctoral dissertation]. Penn State University; 2010. [cited 2019 Sep 22].
Available from: https://etda.libraries.psu.edu/catalog/11447.
Council of Science Editors:
Perez PL. EFFECTS OF THE CHEMICAL STRUCTURE AND COMPOSITION ON THE
CONTROLLED AUTOIGNITION OF HYDROCARBON FUELS. [Doctoral Dissertation]. Penn State University; 2010. Available from: https://etda.libraries.psu.edu/catalog/11447
Halmstad University
17.
Gagnolet, Marielle.
Optimization of the polishing procedure using a robot assisted polishing equipment.
Degree: Business and Engineering (SET), 2009, Halmstad University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2682
► Today, manual polishing is the most common method to improve the surface finish of mould and dies for e.g. plastic injection moulding, although it…
(more)
▼ Today, manual polishing is the most common method to improve the surface finish of mould and dies for e.g. plastic injection moulding, although it is a cumbersome and time-consuming process. Therefore, automated robots are being developed in order to speed up and secure the final result of this important final process. The purpose of this thesis is to find out some clues about the influence of different parameters for the polishing of a steel grade called Mirrax ESR (Uddeholm Tooling AB) using a Design of Experiment. The report starts with a brief description of mechanical polishing (the techniques and polishing mechanisms) and ends up with the optimization of the polishing procedure with a polishing machine, the Strecon RAP-200 made by Strecon A/S. Even if all the runs of the Design of Experiments couldn’t be carried out, the surfaces studied revealed some information about the importance of the previous process (turning marks not removed) and about the link between the aspect of the surfaces and the roughness parameters.
Subjects/Keywords: high gloss polishing; surface characterisation; design of experiments
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APA (6th Edition):
Gagnolet, M. (2009). Optimization of the polishing procedure using a robot assisted polishing equipment. (Thesis). Halmstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2682
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):
Gagnolet, Marielle. “Optimization of the polishing procedure using a robot assisted polishing equipment.” 2009. Thesis, Halmstad University. Accessed September 22, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2682.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gagnolet, Marielle. “Optimization of the polishing procedure using a robot assisted polishing equipment.” 2009. Web. 22 Sep 2019.
Vancouver:
Gagnolet M. Optimization of the polishing procedure using a robot assisted polishing equipment. [Internet] [Thesis]. Halmstad University; 2009. [cited 2019 Sep 22].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2682.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gagnolet M. Optimization of the polishing procedure using a robot assisted polishing equipment. [Thesis]. Halmstad University; 2009. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2682
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
18.
Jensen, Oscar.
Optimisation of a robotic painting process by implementing Design of Experiments.
Degree: 2017, , Department of Mechanical Engineering
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-14700
► The modern painting process in automotive industry is complex and a lot of factors affect the result. The trial and error method is used…
(more)
▼ The modern painting process in automotive industry is complex and a lot of factors affect the result. The trial and error method is used today to control the quality and introduce new colours. This method takes a lot of time and does not show any clear numbers of how the process is affected by changing the parameters. During this thesis, we have investigated a delimited number of parameters. The work is based on experiments performed on samples that represents a flat surface of the cab, to reduce experimental costs. Our master thesis is done at Scania in Oskarshamn, where all the cabs for the European production is produced. The objectives with this thesis has been to explain how the process parameters of the robotic applicator affect the paint distribution, paint thickness and the colour of the top coat. We also optimised the process by finding which settings gives an even paint distribution, a correct thickness and an accepted colour of the top coat. We have been using Design of Experiments to achieve the goals of this study. Design of Experiments is a statistic method that is used to perform experiments effectively. It also shows the effect of changing the factors from a low to a high level. We have chosen to divide the workflow into three parts: screening, optimisation and confirmation. The experiments are performed during the daily production to replicate the real circumstances. The shape air, paint flow and high rotation is the most important parameters to control. Paint flow also seems to have a linear impact on the thickness of the top coat layer. The Shape air and the high rotation on the other hand mainly affect the distribution of the top coat layer. Different levels are needed for the shape air and high rotation depending on what paint flow is used. The optimal settings of the factors for our colour were found to be paint flow at 82 %, the shape air at 90 %, the high rotation at 90 % and high voltage at 100 %. The optimal settings give a result of 1,535 μm in spread and 40,08 μm in mean thickness. Our settings compared to today’s results contributes to a reduced paint consumption, better quality and therefore less rework.
Subjects/Keywords: Design of Experiments; Top coat; Robotic paint application; Mechanical Engineering; Maskinteknik
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APA (6th Edition):
Jensen, O. (2017). Optimisation of a robotic painting process by implementing Design of Experiments. (Thesis). , Department of Mechanical Engineering. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-14700
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):
Jensen, Oscar. “Optimisation of a robotic painting process by implementing Design of Experiments.” 2017. Thesis, , Department of Mechanical Engineering. Accessed September 22, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:bth-14700.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jensen, Oscar. “Optimisation of a robotic painting process by implementing Design of Experiments.” 2017. Web. 22 Sep 2019.
Vancouver:
Jensen O. Optimisation of a robotic painting process by implementing Design of Experiments. [Internet] [Thesis]. , Department of Mechanical Engineering; 2017. [cited 2019 Sep 22].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-14700.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jensen O. Optimisation of a robotic painting process by implementing Design of Experiments. [Thesis]. , Department of Mechanical Engineering; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-14700
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Virginia Tech
19.
Kensler, Jennifer Lin Karam.
Analysis of Reliability Experiments with Random Blocks and Subsampling.
Degree: PhD, Statistics, 2012, Virginia Tech
URL: http://hdl.handle.net/10919/28415
► Reliability experiments provide important information regarding the life of a product, including how various factors may affect product life. Current analyses of reliability data usually…
(more)
▼ Reliability
experiments provide important information regarding the life of a product, including how various factors may affect product life. Current analyses of reliability data usually assume a completely randomized
design. However, reliability
experiments frequently contain subsampling which is a restriction on randomization. A typical experiment involves applying treatments to test stands, with several items placed on each test stand. In addition, raw materials used in
experiments are often produced in batches. In some cases one batch may not be large enough to provide materials for the entire experiment and more than one batch must be used. These batches lead to a
design involving blocks. This dissertation proposes two methods for analyzing reliability
experiments with random blocks and subsampling. The first method is a two-stage method which can be implemented in software used by most practitioners, but has some limitations. Therefore, a more rigorous nonlinear mixed model method is proposed.
Advisors/Committee Members: Vining, Gordon Geoffrey (committeechair), Freeman, Laura J. (committee member), Hong, Yili (committee member), Woodall, William H. (committee member).
Subjects/Keywords: Design of Experiments; Regression with Lifetime Data; Random Effects; Weibull Distribution
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APA (6th Edition):
Kensler, J. L. K. (2012). Analysis of Reliability Experiments with Random Blocks and Subsampling. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/28415
Chicago Manual of Style (16th Edition):
Kensler, Jennifer Lin Karam. “Analysis of Reliability Experiments with Random Blocks and Subsampling.” 2012. Doctoral Dissertation, Virginia Tech. Accessed September 22, 2019.
http://hdl.handle.net/10919/28415.
MLA Handbook (7th Edition):
Kensler, Jennifer Lin Karam. “Analysis of Reliability Experiments with Random Blocks and Subsampling.” 2012. Web. 22 Sep 2019.
Vancouver:
Kensler JLK. Analysis of Reliability Experiments with Random Blocks and Subsampling. [Internet] [Doctoral dissertation]. Virginia Tech; 2012. [cited 2019 Sep 22].
Available from: http://hdl.handle.net/10919/28415.
Council of Science Editors:
Kensler JLK. Analysis of Reliability Experiments with Random Blocks and Subsampling. [Doctoral Dissertation]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/28415
Universidade do Rio Grande do Sul
20.
Farias, Marcelo Fernandes.
Determinação da influência de parâmetros de processo de forjamento a quente utilizando DOE (projeto de experimentos).
Degree: 2017, Universidade do Rio Grande do Sul
URL: http://hdl.handle.net/10183/170979
► Atualmente o Projeto de Experimentos (DOE) vem sendo largamente utilizado para determinar os fatores de projetos e processos mais significativos afetando uma variável resposta e…
(more)
▼ Atualmente o Projeto de Experimentos (DOE) vem sendo largamente utilizado para determinar os fatores de projetos e processos mais significativos afetando uma variável resposta e para estabelecer modelos empíricos entre os fatores, entretanto este método ainda é pouco utilizado e processo de forjamento a quente. O presente trabalho analisa a influência individual e cumulativa de alguns parâmetros controláveis de um processo de forjamento a quente em matriz fechada na força de prensagem necessária para sua realização. Esta análise foi realizada utilizando a técnica de Projeto de Experimentos (DOE). Para a determinação da influência dos parâmetros de processo selecionados na variável resposta do Projeto de Experimentos (DOE), uma série de ensaios variando o lubrificante utilizado, o diâmetro da geratriz e a temperatura de forjamento foram realizados. A variável resposta para o experimento foi definida como a força de prensagem exigida do equipamento para a realização do forjamento. Para este trabalho foi utilizado o material ABNT 4140 fornecido em barras trefiladas de 28,6mm (1.1/8″) posteriormente forjado a quente em matriz fechada. Os resultados mostraram que o fator que mais influencia na força de prensagem para a situação ensaiada é o lubrificante. Os demais fatores, mesmo combinados, não apresentaram uma influência significativa na variável resposta. O presente estudo demonstra que é possível a utilização de técnicas de ajuste e definição de parâmetros de processo de forjamento a quente de maneira confiável e sem a necesside da aplicação dos complexos programas de simulação computacional e os métodos de tentativa e erro ainda presentes na indústria. Finalmente este trabalho reforça a versatilidade do Projeto de Experimentos (DOE) ainda pouco aplicado em processos de forjamento.
Nowadays the Design of Experiments (DOE) has been widely used to determine the most significant project and process factors affecting a response variable and to establish empirical models among the factors, although this method is still little used and the process of hot forging. This work analyzes the individual and cumulative influence of some controllable parameters in a closed die hot forging process in the pressing force required for its realization. This analysis was performed using a Design of Experiments (DOE) method. To determine the influence of variable factors selected in response Design of Experiments (DOE), a several tests varying the lubricant, the diameter of the billet and the forging temperature was performed. The response variable for the experiment was defined as pressing force. For this study, it was used the ABNT 4140 steel provided in drawn bars of 28,6mm (1 1/8 ″). The fator that had more influence over the pressing force was the lubricant. Other factors, whether or not combined, did not show a significant influence on the response variable. This study demonstrates that it is possible use techniques to set hot forging process parameters reliably and without necesside the application of complex computer simulation…
Advisors/Committee Members: Schaeffer, Lirio.
Subjects/Keywords: Design of Experiments; Forjamento a quente; Métodos estatísticos; DOE; Hot Forging
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APA (6th Edition):
Farias, M. F. (2017). Determinação da influência de parâmetros de processo de forjamento a quente utilizando DOE (projeto de experimentos). (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/170979
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):
Farias, Marcelo Fernandes. “Determinação da influência de parâmetros de processo de forjamento a quente utilizando DOE (projeto de experimentos).” 2017. Thesis, Universidade do Rio Grande do Sul. Accessed September 22, 2019.
http://hdl.handle.net/10183/170979.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Farias, Marcelo Fernandes. “Determinação da influência de parâmetros de processo de forjamento a quente utilizando DOE (projeto de experimentos).” 2017. Web. 22 Sep 2019.
Vancouver:
Farias MF. Determinação da influência de parâmetros de processo de forjamento a quente utilizando DOE (projeto de experimentos). [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2017. [cited 2019 Sep 22].
Available from: http://hdl.handle.net/10183/170979.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Farias MF. Determinação da influência de parâmetros de processo de forjamento a quente utilizando DOE (projeto de experimentos). [Thesis]. Universidade do Rio Grande do Sul; 2017. Available from: http://hdl.handle.net/10183/170979
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
21.
Hizli, Cem.
Thermal Optimization of Veo+ Projectors (thesis work at Optea AB) : Trying to reduce noise of the Veo+ projector by DOE (Design of Experiment) tests to find anoptimal solution for the fan algorithm while considering the thermal specifics of the unit.
Degree: Design and Engineering, 2010, Mälardalen University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10382
► The Veo+ projector is using a cooling system that consists of fan and blowers. This system is cooling the electronic components of the device…
(more)
▼ The Veo+ projector is using a cooling system that consists of fan and blowers. This system is cooling the electronic components of the device and the lamp of the projector, however extracting a high noise. To lower this noise the rpm speeds (rotational speed) of the fan and blowers should be decreased. Thus, lowering the speed will result in higher temperature values in whole system (inside the device). While lowering the speed, the higher temperature values should be kept within the thermal design specifications of the electronic components. The purpose of this thesis work is to find an optimal solution with lower rpm speeds of the fan and blowers while keeping the temperatures of the various components of the device (touch temperature of the enclosure and electronic components) within the temperature design limits. Before testing the device to find the optimum state, the design limits of the device are determined. Then, by using the design of experiment methods like Taguchi, the optimum state for the device within the design specifications is obtained. Finally, additional tests are applied within the optimum state to demonstrate a fan algorithm as a final solution. While doing the experiments thermocouples are used for measuring the component temperatures.
Subjects/Keywords: Projector; thermal optimization; thermocouple; design of experiments; taguchi
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APA (6th Edition):
Hizli, C. (2010). Thermal Optimization of Veo+ Projectors (thesis work at Optea AB) : Trying to reduce noise of the Veo+ projector by DOE (Design of Experiment) tests to find anoptimal solution for the fan algorithm while considering the thermal specifics of the unit. (Thesis). Mälardalen University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10382
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):
Hizli, Cem. “Thermal Optimization of Veo+ Projectors (thesis work at Optea AB) : Trying to reduce noise of the Veo+ projector by DOE (Design of Experiment) tests to find anoptimal solution for the fan algorithm while considering the thermal specifics of the unit.” 2010. Thesis, Mälardalen University. Accessed September 22, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10382.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hizli, Cem. “Thermal Optimization of Veo+ Projectors (thesis work at Optea AB) : Trying to reduce noise of the Veo+ projector by DOE (Design of Experiment) tests to find anoptimal solution for the fan algorithm while considering the thermal specifics of the unit.” 2010. Web. 22 Sep 2019.
Vancouver:
Hizli C. Thermal Optimization of Veo+ Projectors (thesis work at Optea AB) : Trying to reduce noise of the Veo+ projector by DOE (Design of Experiment) tests to find anoptimal solution for the fan algorithm while considering the thermal specifics of the unit. [Internet] [Thesis]. Mälardalen University; 2010. [cited 2019 Sep 22].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10382.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hizli C. Thermal Optimization of Veo+ Projectors (thesis work at Optea AB) : Trying to reduce noise of the Veo+ projector by DOE (Design of Experiment) tests to find anoptimal solution for the fan algorithm while considering the thermal specifics of the unit. [Thesis]. Mälardalen University; 2010. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10382
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Linköping University
22.
Raja, Visakha.
Sub-Modelling of a Jet Engine Component and Creation of Stiffness Interval Based on Cast Dimensional Variations.
Degree: Solid Mechanics, 2011, Linköping University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69479
► While designing jet-engine components information about the loads that the component will be subjected to, is critical. For this, a full system analysis of…
(more)
▼ While designing jet-engine components information about the loads that the component will be subjected to, is critical. For this, a full system analysis of the engine is often performed with every component put together in a large finite element model, which is called the whole engine model (WEM). This model will mostly be composed of lower order shell elements with a few thousands of elements. At the design level of a component, the FE model is detailed with several hundred thousand higher order solid elements. The detailed model cannot be directly put into the whole engine model due to excessive run times. Therefore there must be a simpler representation of the component -a sub-model- with much fewer elements so that it can be assembled into the whole engine model. This simple model must have the same stiffness (load/displacement) in chosen directions, the same mass and the basic mode shapes and frequencies should also be the same with the detailed model. 4 different structural optimisation schemes were studied to prepare a model: sizing optimisation, optimisation with material properties as design variables, combined sizing and material property optimisation and free-size optimisation. Among these free-size optimisation where each element in the model has its own design variable -thickness- was found to be the most effective method. The stiffness could be matched to the detailed model as close as 5% and so also could the first two fundamental mode shapes and frequencies. Additionally, the initial sub-model prepared was used to do a preliminary study on how variations in casting dimensions would affect the stiffness of the component in a certain direction. This was done by creating a design of experiments (DoE) for the stiffness. A response surface for the stiffness was created in terms of the dimensions that have the most significant effect. This was later used to predict an interval for the stiffness based on variations in the cast dimensions with a confidence level of 99.7%.
Subjects/Keywords: Sub-modelling; Structural Optimisation; Design of Experiments; TECHNOLOGY; TEKNIKVETENSKAP
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APA (6th Edition):
Raja, V. (2011). Sub-Modelling of a Jet Engine Component and Creation of Stiffness Interval Based on Cast Dimensional Variations. (Thesis). Linköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69479
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):
Raja, Visakha. “Sub-Modelling of a Jet Engine Component and Creation of Stiffness Interval Based on Cast Dimensional Variations.” 2011. Thesis, Linköping University. Accessed September 22, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69479.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Raja, Visakha. “Sub-Modelling of a Jet Engine Component and Creation of Stiffness Interval Based on Cast Dimensional Variations.” 2011. Web. 22 Sep 2019.
Vancouver:
Raja V. Sub-Modelling of a Jet Engine Component and Creation of Stiffness Interval Based on Cast Dimensional Variations. [Internet] [Thesis]. Linköping University; 2011. [cited 2019 Sep 22].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69479.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Raja V. Sub-Modelling of a Jet Engine Component and Creation of Stiffness Interval Based on Cast Dimensional Variations. [Thesis]. Linköping University; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69479
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Luleå University of Technology
23.
Koivuniemi, Pirjo.
Robustness analysis of welding simulations by using Design of Experiments.
Degree: 2008, Luleå University of Technology
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-52551
► In this master’s thesis robustness in welding has been investigated by means of simulations. A simple welding case has been simulated with the FE…
(more)
▼ In this master’s thesis robustness in welding has been investigated by means of simulations. A simple welding case has been simulated with the FE program MSC.Marc. If stability can be discovered during a simulation, then the welding process can be redesigned. However, instability in the simulation must not be due to instability in the real welding process. It can be due to pure numerical and modelling causes also and therefore care must be exercised when evaluating robustness. The study also includes a review part about the meaning of robustness and different approaches for evaluating this. In this work, a parametric study was used to investigate the robustness for an existing model. The material used in the simulations is called Greek Ascoloy, a martensitic stainless steel and the geometry consists of two plates which are welded together without additional filler material. The aim was to investigate which of the chosen parameters has the largest influence on the model, i.e. how sensitive or robust the model is when it is subject to disturbances. The chosen parameters to investigate were Poisson’s ratio, Young’s modulus, thermal expansion, initial yield stress, minimum yield stress, welding power, and the heat source geometrical parameters. To evaluate the results and determine whether or not the model is robust for a given set of parameters, the responses of the residual stresses in the sheet plane as well as gap and out of plane deformations were studied. The study was performed by using a factor screening method and each investigated parameter has been investigated at three levels. The methodology has been to change one parameter at a time while keeping the other parameters constant. The results have shown that the simulation model is quite sensitive to changes in welding power which resulted in increased deformations when the power was set to a high level. This will of course also occur in a real welding operation since the welding power has a big influence on the deformations of the welded component. The mechanical activation and thermal expansion, both resulting in large differences of stresses and deformations between the different levels, have also shown to have a negative influence on the robustness of the model. The heat source geometrical parameters have not influenced the model to large extent, although reducing the cr parameter showed an increased gap deformation. The model has also shown to be robust regarding changes in Young’s modulus, Poisson’s ratio and yield stress since very small changes in stresses and deformations occurred when changing these parameters. One possible continuation of this work could be to study the influence of interaction between the different parameters on the robustness of the model. Also, an in-depth investigation to explain why the model is more sensitive to changes in certain parameters would also be of interest.
Validerat; 20101217 (root)
Subjects/Keywords: Technology; welding; FEM; Design of Experiments; robustness; parametric; study; Teknik
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APA (6th Edition):
Koivuniemi, P. (2008). Robustness analysis of welding simulations by using Design of Experiments. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-52551
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):
Koivuniemi, Pirjo. “Robustness analysis of welding simulations by using Design of Experiments.” 2008. Thesis, Luleå University of Technology. Accessed September 22, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-52551.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Koivuniemi, Pirjo. “Robustness analysis of welding simulations by using Design of Experiments.” 2008. Web. 22 Sep 2019.
Vancouver:
Koivuniemi P. Robustness analysis of welding simulations by using Design of Experiments. [Internet] [Thesis]. Luleå University of Technology; 2008. [cited 2019 Sep 22].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-52551.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Koivuniemi P. Robustness analysis of welding simulations by using Design of Experiments. [Thesis]. Luleå University of Technology; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-52551
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Linnaeus University
24.
Milani, Mauro.
Optimization of the pressing process of triangular shaped cutting tool inserts.
Degree: Mechanical Engineering, 2016, Linnaeus University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-58282
► Pressing of metallic powders is a manufacturing process widely investigated in the research field and in the industry. This thesis project is focused on…
(more)
▼ Pressing of metallic powders is a manufacturing process widely investigated in the research field and in the industry. This thesis project is focused on optimizing the pressing process of cemented carbide powder utilized for the production of triangular shaped cutting tool inserts. In particular, the filling of powder into the die cavity was investigated with respect to different pressing parameters. The aim of the project was to obtain a uniform density distribution of the powder into the die cavity, and hence to reduce the variation of the height of the insert obtaining more precise dimension of the latter. The tests were carried out at the Sandvik Coromant production department which is the creator of the project. The optimization of the pressing process was performed according to the Design of experiments theory. The dynamic of the sintering process was also investigated. The results showed a significant improvement in the filling of the die cavity and a significant decrease of the variation of the height of the inserts. The new insert obtained has more precise dimensions and is able to meet the more demanding requirements of the customers. The results achieved are directly applicable to a larger number of products, and indicate the direction to follow for further development of the manufacturing process.
Subjects/Keywords: Powder metallurgy; Design of experiments; Cutting tool inserts; Cemented carbide
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APA (6th Edition):
Milani, M. (2016). Optimization of the pressing process of triangular shaped cutting tool inserts. (Thesis). Linnaeus University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-58282
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):
Milani, Mauro. “Optimization of the pressing process of triangular shaped cutting tool inserts.” 2016. Thesis, Linnaeus University. Accessed September 22, 2019.
http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-58282.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Milani, Mauro. “Optimization of the pressing process of triangular shaped cutting tool inserts.” 2016. Web. 22 Sep 2019.
Vancouver:
Milani M. Optimization of the pressing process of triangular shaped cutting tool inserts. [Internet] [Thesis]. Linnaeus University; 2016. [cited 2019 Sep 22].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-58282.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Milani M. Optimization of the pressing process of triangular shaped cutting tool inserts. [Thesis]. Linnaeus University; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-58282
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Manchester
25.
Sammut-Powell, Camilla.
Improved Design Criteria Robust for Complex Variance
Structures.
Degree: 2018, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:313032
► There are many design criteria available which have been constructed to address specific statistical design problems. Although much research has been conducted to improve the…
(more)
▼ There are many
design criteria available which have
been constructed to address specific statistical
design problems.
Although much research has been conducted to improve the
design
procedure to address the needs of the experiment, often with the
introduction of new criteria, it can be that they lack robustness
to assumptions meaning that the optimum
design produced could be of
little use if the experimental assumptions are not met. Not
evaluating the robustness for such criteria could therefore be
detrimental to a study and criteria which are highly sensitive to
such issues should not be used. Within the thesis, we consider the
performance of some chosen criteria for response surface studies
when assumptions are no longer met. We demonstrate flaws in well
accepted criteria and introduce new and improved criteria which are
more appropriate for the construction and evaluation of designs.
The problems addressed are for designs with interest in estimating
the parameters and hence take some functional form of the
D-optimality criterion. The new criteria proposed provide superior
alternative designs to the naively constructed designs using the
accepted criteria. The focus is on three problems: the effect of
trends on designs, self-robustness of a
design with respect to
parameter estimates and the inappropriate use of a criterion
developed from asymptotic results in small samples. The effect of
trends has only been studied within a restrictive choice of models,
with the aim of orthogonalizing the fixed effect parameters to the
trend parameters. We propose a new criterion which allows the trend
to affect the variance and for the response to have a non-normal
distribution, as well as having other advantageous properties. We
also propose a criterion to evaluate the self-robustness of a
design, i.e. robust for the assumed parameter values, which uses
the information matrix to generate the possibilities for the
parameter estimate and is therefore dependent on the
design. This
is a dynamic approach and allows for an intrinsic assessment of the
performance of a
design. The inappropriate use of criteria
developed from asymptotic results in small samples is our final
design problem of interest. We propose using a corrected criterion,
adjusting for the use of an asymptotic result in a small sample.
The correction takes into account the use of the estimates of
variance components and combines the information for the fixed
effects and the variance components in a new way other than simply
taking the product of the information matrices.
Advisors/Committee Members: PAN, JIANXIN J, Donev, Alexander, Pan, Jianxin.
Subjects/Keywords: Design of Experiments; Robustness; Variance Components; Small Samples; Mixed Models
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sammut-Powell, C. (2018). Improved Design Criteria Robust for Complex Variance
Structures. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:313032
Chicago Manual of Style (16th Edition):
Sammut-Powell, Camilla. “Improved Design Criteria Robust for Complex Variance
Structures.” 2018. Doctoral Dissertation, University of Manchester. Accessed September 22, 2019.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:313032.
MLA Handbook (7th Edition):
Sammut-Powell, Camilla. “Improved Design Criteria Robust for Complex Variance
Structures.” 2018. Web. 22 Sep 2019.
Vancouver:
Sammut-Powell C. Improved Design Criteria Robust for Complex Variance
Structures. [Internet] [Doctoral dissertation]. University of Manchester; 2018. [cited 2019 Sep 22].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:313032.
Council of Science Editors:
Sammut-Powell C. Improved Design Criteria Robust for Complex Variance
Structures. [Doctoral Dissertation]. University of Manchester; 2018. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:313032
Rochester Institute of Technology
26.
Kist, Michael J.
Logistic Regression Slope Study.
Degree: MS, Industrial and Systems Engineering, 2017, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/9441
► Logistic regression is a valuable statistical tool used to model the probability of a binary response variable as a function of one or more…
(more)
▼ Logistic regression is a valuable statistical tool used to model the probability of a binary response variable as a function of one or more input variables. The goal of this thesis research is to develop a better understanding of how the coefficients of a logistic regression model influence the probability of a response. Typically, the odds ratio is used for this, but this research focuses on the steepness of logistic curve near the median quantile. In order to study this, a web application using R Shiny was developed to simulate a logistic regression function based on a single continuous input variable. The web application allows a variety of inputs to be manipulated, including sample size, noise structure, amount of noise, and actual parameter values. An example using the NASA O-Ring data is illustrated as motivation and discussion.
Advisors/Committee Members: Rachel Silvestrini, Scott Grasman.
Subjects/Keywords: Binary response variable; Design of experiments; Generalized linear model; Mathematical modeling
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APA ·
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APA (6th Edition):
Kist, M. J. (2017). Logistic Regression Slope Study. (Masters Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/9441
Chicago Manual of Style (16th Edition):
Kist, Michael J. “Logistic Regression Slope Study.” 2017. Masters Thesis, Rochester Institute of Technology. Accessed September 22, 2019.
https://scholarworks.rit.edu/theses/9441.
MLA Handbook (7th Edition):
Kist, Michael J. “Logistic Regression Slope Study.” 2017. Web. 22 Sep 2019.
Vancouver:
Kist MJ. Logistic Regression Slope Study. [Internet] [Masters thesis]. Rochester Institute of Technology; 2017. [cited 2019 Sep 22].
Available from: https://scholarworks.rit.edu/theses/9441.
Council of Science Editors:
Kist MJ. Logistic Regression Slope Study. [Masters Thesis]. Rochester Institute of Technology; 2017. Available from: https://scholarworks.rit.edu/theses/9441
Rochester Institute of Technology
27.
Datar, Anuj.
Micro-extrusion process parameter modeling.
Degree: Industrial and Systems Engineering, 2012, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/5710
► Direct write processes are a family of technologies with the ability to deposit functional structures directly onto planar and non-planar surfaces. Direct writing includes a…
(more)
▼ Direct write processes are a family of technologies with the ability to deposit functional structures directly onto planar and non-planar surfaces. Direct writing includes a variety of processes that use different mechanisms to transfer materials on to substrates and can be generally distinguished from conventional rapid prototyping processes by a feature resolution in the sub-micron to micron range. The dispensing system studied in this thesis is a pneumatically actuated micro-extruder which is capable of processing a wide variety of materials. This material dispensing tool is capable of depositing small amounts of material to build three dimensional structures in an accurate and repeatable manner. The material dispensing system in this study has a variety of manufacturing applications ranging from printed electronics to biomedical applications.
The material dispensing system employs a needle valve mechanism that allows ink or slurry to be deposited onto a substrate using air pressure. The dispensing tool used for this research is an nScrypt SmartPump. This research is focused on analyzing the extrusion process and developing and validating a parametric model for the input parameters using a
design of
experiments (DOE) approach. The aim is to improve the repeatability and accuracy of the process.
A two phase approach was used to identify significant input parameters impacting the dimensional properties of a printed track. The first set of
experiments employed a 2-level fractional factorial screening
design where all user controllable parameters were tested against the response variables - height and width of a printed track. Significant parameters from this analysis were then used to build a regression equation for both height and width. It was observed that while the regression equation for height was accurate in predicting the output at intermediate levels, the regression equation for width was unable to do so and displayed signs of curvature. A higher order three-level regression model was then fit to the significant parameters for width and was found to be satisfactory in predicting process output. The errors observed between predicted outputs from the regression equations and actual output dimensions from the validation
experiments were less than 2% and 3% for height and width respectively.
Advisors/Committee Members: Cormier, Denis, Esterman, Marcos.
Subjects/Keywords: Design of experiments; Extrusion; Micro-extrusion; nScrypt; Parameter modeling; Regression
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APA ·
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CSE |
Export
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APA (6th Edition):
Datar, A. (2012). Micro-extrusion process parameter modeling. (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/5710
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):
Datar, Anuj. “Micro-extrusion process parameter modeling.” 2012. Thesis, Rochester Institute of Technology. Accessed September 22, 2019.
https://scholarworks.rit.edu/theses/5710.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Datar, Anuj. “Micro-extrusion process parameter modeling.” 2012. Web. 22 Sep 2019.
Vancouver:
Datar A. Micro-extrusion process parameter modeling. [Internet] [Thesis]. Rochester Institute of Technology; 2012. [cited 2019 Sep 22].
Available from: https://scholarworks.rit.edu/theses/5710.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Datar A. Micro-extrusion process parameter modeling. [Thesis]. Rochester Institute of Technology; 2012. Available from: https://scholarworks.rit.edu/theses/5710
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of North Texas
28.
Garcia, Andres.
Design and Manufacture of Molding Compounds for High Reliability Microelectronics in Extreme Conditions.
Degree: 2016, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc955110/
► The widespread use of electronics in more avenues of consumer use is increasing. Applications range from medical instrumentation that directly can affect someone's life, down…
(more)
▼ The widespread use of electronics in more avenues of consumer use is increasing. Applications range from medical instrumentation that directly can affect someone's life, down hole sensors for oil and gas, aerospace, aeronautics, and automotive electronics. The increased power density and harsh environment makes the reliability of the packaging a vital part of the reliability of the device. The increased importance of analog devices in these applications, their high voltage and high temperature resilience is resulting in challenges that have not been dealt with before. In particular packaging where insulative properties are vital use polymer resins modified by ceramic fillers. The distinct dielectric properties of the resin and the filler result in charge storage and release of the polarization currents in the composite that have had unpredictable consequences on reliability. The objective of this effort is therefore to investigate a technique that
can be used to measure the polarization in filled polymer resins and evaluate reliable molding compounds. A valuable approach to measure polarization in polymers where charge release is tied to the glass transition in the polymer is referred to as thermally stimulated depolarization current (TSDC) technique. In this dissertation a new TSDC measurement system was designed and fabricated. The instrument is an assembly of several components that are automated via a LabVIEW program that gives the user flexibility to test different dielectric compounds at high temperatures and high voltage. The temperature control is enabled through the use of dry air convection heating at a very slow rate enabling controlled heating and cooling. Charge trapping and de-trapping processes were investigated in order to obtain information on insulating polymeric composites and how to optimize it. A number of material properties were investigated. First, polarization due to charges on the filer were
investigated using composites containing charged and uncharged particles using quartz and ion exchange montmorillonite silicates in an epoxy matrix. The thermally-activated charge release shows a difference in the composite characteristics and preparation. This difference indicates that the trap levels depend on the de-trapping process and on the chemical nature of the trap site. Using a numerical approach to the release spectra, a model was developed to examine through short time testing, important parameters such as glass transition temperature, residual polarization, depolarization peak, window polarization modeling and activation energy of relaxations. Second the
design of mold compounds that could combine manufacturing (temperature of molding), geometric (thickness of packaging material), composition (amount and size of filler) effects was developed using a novel
design of
experiments approach. The statistical DOE enabled the determination of which causes should be considered
when designing a mold compound that has minimal polarization both as singular variables as well as combined variables. …
Advisors/Committee Members: D’Souza, Nandika Anne, Shi, Sheldon Q., Brostow, Witold, Reidy, Richard, Shepherd, Nigel, Choi, Tae-Youl, Tuncer, Enis.
Subjects/Keywords: Dielectrics; insulators; polarization; mold compounds; design of experiments
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University of North Texas
29.
Shaikh, Vasim.
Mist and Microstructure Characterization in End Milling Aisi 1018 Steel Using Microlubrication.
Degree: 2013, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc283858/
► Flood cooling is primarily used to cool and lubricate the cutting tool and workpiece interface during a machining process. But the adverse health effects caused…
(more)
▼ Flood cooling is primarily used to cool and lubricate the cutting tool and workpiece interface during a machining process. But the adverse health effects caused by the use of flood coolants are drawing manufacturers' attention to develop methods for controlling occupational exposure to cutting fluids. Microlubrication serves as an alternative to flood cooling by reducing the volume of cutting fluid used in the machining process. Microlubrication minimizes the exposure of metal working fluids to the machining operators leading to an economical, safer and healthy workplace environment. In this dissertation, a vegetable based lubricant is used to conduct mist, microstructure and wear analyses during end milling AISI 1018 steel using microlubrication. A two-flute solid carbide cutting tool was used with varying cutting speed and feed rate levels with a constant depth of cut. A full factorial experiment with Multivariate Analysis of Variance (MANOVA) was conducted and regression models were generated along with parameter optimization for the flank wear, aerosol mass concentration and the aerosol particle size. MANOVA indicated that the speed and feed variables main effects are significant, but the interaction of (speed*feed) was not significant at 95% confidence level. The model was able to predict 69.44%, 68.06% and 42.90% of the variation in the data for both the flank wear side 1 and 2 and aerosol mass concentration, respectively. An adequate signal-to-noise precision ratio more than 4 was obtained for the models, indicating adequate signal to use the model as a predictor for both the flank wear sides and aerosol mass concentration. The highest average mass concentration of 8.32 mg/m3 was realized using cutting speed of 80 Surface feet per minute (SFM) and a feed rate of 0.003 Inches per tooth (IPT). The lowest average mass concentration of 5.91 mg/m3 was realized using treatment 120 SFM and 0.005 IPT. The cutting performance under microlubrication is five times better in terms of tool life and two times better in terms of materials removal volume under low cutting speed and feed rate combination as compared to high cutting speed and feed rate combination. Abrasion was the dominant wear mechanism for all the cutting tools under consideration. Other than abrasion, sliding adhesive wear of the workpiece materials was also observed. The scanning electron microscope investigation of the used cutting tools revealed micro-fatigue cracks, welded micro-chips and unusual built-up edges on the cutting tools flank and rake side. Higher tool life was observed in the lowest cutting speed and feed rate combination. Transmission electron microscopy analysis at failure for the treatment 120 SFM and 0.005 IPT helped to quantify the dislocation densities. Electron backscatter diffraction (EBSD) identified 4 to 8 µm grain size growth on the machined surface due to residual stresses that are the driving force for the grain boundaries motion to reduce its overall energy resulting in the slight grain growth. EBSD also showed that (001)…
Advisors/Committee Members: Boubekri, Nourredine, Scharf, Thomas W., Banerjee, Rajarshi, Collins, Peter, Young, Marcus L..
Subjects/Keywords: Microlubrication; MQL; design of experiments; tool weak; milling; steel
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University of Manitoba
30.
Sirski, Monica.
On the statistical analysis of functional data arising from designed experiments.
Degree: Statistics, 2012, University of Manitoba
URL: http://hdl.handle.net/1993/5285
► We investigate various methods for testing whether two groups of curves are statistically significantly different, with the motivation to apply the techniques to the analysis…
(more)
▼ We investigate various methods for testing whether two groups of curves are statistically significantly different, with the motivation to apply the techniques to the
analysis of data arising from designed
experiments. We propose a set of tests based on pairwise differences between individual curves. Our objective is to compare the power and robustness of a variety of tests, including a collection of permutation tests, a test based on the functional principal components scores, the adaptive Neyman test and the functional F test. We illustrate the application of these tests in the context of a designed 2
4 factorial experiment with a case study using data provided by NASA. We apply the methods for comparing curves to this factorial data by dividing the data into two groups by each effect (A, B, . . . , ABCD) in turn. We carry out a large simulation study investigating the power of the tests in detecting contamination, location, and shift effects on unimodal and monotone curves. We conclude that the permutation test using the mean of the pairwise differences in L1 norm has the best overall power performance and is a robust test statistic applicable in a wide variety of situations. The advantage of using a permutation test is that it is an exact, distribution-free test that performs well overall when applied to functional data. This test may be extended to more than two groups by constructing test statistics based on averages of pairwise differences between curves from the different groups and, as such, is an important building-block for larger
experiments and more complex designs.
Advisors/Committee Members: Brewster, John F. (Statistics) (supervisor), Leblanc, Alexandre (Statistics) McLeod, Robert (Statistics), Lix, Lisa (Community Health Sciences) Vining, G. Geoffrey (Virginia Tech) (examiningcommittee).
Subjects/Keywords: functional data analysis; design of experiments; permutation test; power analysis
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sirski, M. (2012). On the statistical analysis of functional data arising from designed experiments. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/5285
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):
Sirski, Monica. “On the statistical analysis of functional data arising from designed experiments.” 2012. Thesis, University of Manitoba. Accessed September 22, 2019.
http://hdl.handle.net/1993/5285.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sirski, Monica. “On the statistical analysis of functional data arising from designed experiments.” 2012. Web. 22 Sep 2019.
Vancouver:
Sirski M. On the statistical analysis of functional data arising from designed experiments. [Internet] [Thesis]. University of Manitoba; 2012. [cited 2019 Sep 22].
Available from: http://hdl.handle.net/1993/5285.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sirski M. On the statistical analysis of functional data arising from designed experiments. [Thesis]. University of Manitoba; 2012. Available from: http://hdl.handle.net/1993/5285
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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Open Access Theses and Dissertations