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Peak, Russell Speights. "Product model-based analytical models (PBAMs) : a new representation of engineering analysis models." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/18379.
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Al-Hammouri, Mohammad Fawzi Ahmad. "Deriving Distributed Design Models from Global Requirements Models." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42083.
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During the system and software development process for distributed systems, the development of the overall system design is critical for correctness, performance, and reliability. The objective of this thesis is the improvement of methods and tools that can be used to obtain a correct design model for distributed system components automatically by deriving the design model from the global system requirements. Mainly, we are concerned with the transformation from a global requirements model to a distributed design model. The global requirements model describes the behavior of a distributed system in an abstract manner by defining the local actions to be performed by different roles which represent actors in the different system components. The distributed design model defines the behavior of each actor separately, including its local actions plus the exchange of coordination messages, which are necessary to assure that the actions are performed in the required order.
In this work, we first consider a global requirements model in the form of partially ordered actions similar to High-level Message Sequence Chart (HMSC). We study the realizability of the global requirements, which is said to be directly realizable if a design model can be constructed without any coordination messages. We study some problems which prevent direct realizability, such as strict sequence, non-local choice, non-deterministic choice, termination race, and others, and show under which conditions these problems are absent and the global model is directly realizable. For the other cases, we show how a conforming design model can be obtained by introducing a minimal number of coordination messages. In this context, we also show under which conditions sequence numbers are required in the messages of a weak while loop.
Then we study the automatic derivation of a distributed design model using a tool. In order to obtain an easily readable notation for the global requirements model, we adapt the HMSC notation to the UML Hierarchical State Machine (HSM) notation and extend this notation to describe the roles that participate in the actions of each state of the global behavior. A simple state represents some local actions of a single role, while a hierarchical state usually represents a collaboration between several roles. Then we describe a derivation algorithm that can be applied to a global model written in this proposed HSM notation and generates a distributable UML HSM model, which contains a hierarchical state machine for each role of the application.
We implemented this derivation algorithm as a tool in the context of the Umple UML development environment. This tool takes a global requirements model written in the extended HSM notation as input and automatically generates a UML HSM model. The distributed implementation environment described in Zakariapour’s thesis is used for generating a distributed Java implementation, where each distributed component contains one Java run-time environment and realizes the behavior of one or several of the roles of the application. A Travel Management System illustrative example has been discussed to illustrate the representation of the global model using the extended HSM notation and to demonstrate the correctness of the generated design models by the tool.
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Menicucci, Domenico. "Some Developments on Mechanism Design and Auctions." Doctoral thesis, Universitat Pompeu Fabra, 2001. http://hdl.handle.net/10803/7595.
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Esta tesis examina un modelo de intercambio en el que un vendedor posee una o más unidades de un determinado bien que puede vender a diferentes compradores potenciales. Cada comprador conoce su propia disponibilidad de pago para el/los bien/es, pero esta información es ignorada por los demás compradores y por el vendedor. Esta tesis estudia el trade-off entre la maximización de la recaudación del vendedor y la eficiencia de la adjudicación final; ésta se logra sí y solamente si el/los bien/es es/son adjudicados al/a los comprador/es que lo/s valoran más.Sobre los mecanismos eficientes de intercambio entre un vendedor y a compradores Makowski y Mezzetti (JET 1993) demostraron que el teorema de no existencia de mecanismos eficientes de Myerson y Satterthwaite (JET 1983) no tiene validez cuando el vendedor se enfrenta por lo menos con dos compradores.El primer capítulo demuestra que para algunos valores de los parámetros existe un mecanismo eficiente que no depende de la distribución de probabilidades para la valoración del vendedor, a diferencia de los mecanismos propuestos por Makowski y Mezzetti. Este resultado hace más simple la implementación de la adjudicación eficiente porque no es necesario que el planificador tenga una distribución de probabilidades para la valoración del vendedor, y mucho menos que ésta sea compartida por los compradores. Demostramos tamibén que un modelo con más unidades tiene propiedades muy similares a las del modelo con una sola unidad.Subastas óptimas para dos objetos en presencia de sinergiasEl segundo capítulo identifica la subasta que maximiza la recaudación del vendedor de dos bienes ante un efecto de sinergia: para cada comprador obtener ambos bienes vale más que la suma de los valores de los bienes individuales.Si el efecto de sinergia es modesto entonces la subasta óptima es equivalente a la del caso en que no hay sinergias. Si, por el contrario, el valore de la sinergia es grande, entonces ambos bienes se venden siempre a pares. En este últino caso notamos quew sólo para algunos valores de los parámetros ambos bienes se venden al comprador que tiene ka valoración máxima del par. Sin embargo, esto no pasa con otros valores de los parámetros: en este caso puede ser óptimo, adjudicar el par de bienes a un comprador que no tiene la valoración máxima para él. Se manifiesta entonces una ineficiencia de adjudicación que no se verifica en ausencia de sinergía (veáse Armstrong, RES 2000). Dicho resultado se puede explicar con modelos "no regulares" para un bien. Subastas optimales en presencia de colusión entre compradores con valoraciones correlacionadasEl último capítulo investiga cuál es la subasta optimal para el vendedor de un bien que se enfrenta a dos compradores con valoraciones positivamente correlacionadas, quienes coluden según el modelo de Laffont y Martimort (Econometría 2000).En el momento de la colusión los compradores pueden poseer información simétrica o asimétrica sobre sus propias valoraciones.Demostrarmos que el vendedor prefiere siempre este último caso. Este resultado intuitivo contrasta con el que Laffont y Martimort obtienen en un modelo de suministro un bien público; en su modelo, para algunos valores de los parámetros, no importa si la colusión se realiza en un contexto de información simétrica o asimétrica. Demostramos que si los compradores están en condciones de transferir el bien dentro de la coalición, entonces el vendedor es indiferente a los casos de información simétrica o asimétrica. En ambos casos realizamos varios ejercicios de estática comparada para estudiar el efecto de la correlación. Para concluir, demostramos que en algunos casos la subasta optimal para el vendedor posee equilibrios múltiples. Este problema se puede resolver imponiendo ulteriores vínculos a la subasta a utilizar, pero esto disminuye la recaudación del vendedor. El problema de eliminar la multiplicidad sin reducir la recaudación no queda resuelto y se deja como tema de una investigación venidera.
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Steffanny, Elaine. "Design communication through model making a taxonomy of physical models in interior design education /." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1468135.
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Pliuskuvienė, Birutė. "Adaptive data models in design." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080627_143940-41525.
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In the dissertation the adaptation problem of the software whose instability is caused by the changes in primary data contents and structure as well as the algorithms for applied problems implementing solutions to problems of applied nature is examined. The solution to the problem is based on the methodology of adapting models for the data expressed as relational sets.Disertacijoje nagrinėjama taikomųjų uždavinių sprendimus realizuojančių programinių priemonių, kurių nepastovumą lemia pirminių duomenų turinio, jų struktūrų ir sprendžiamų taikomojo pobūdžio uždavinių algoritmų pokyčiai, adaptavimo problema.
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Bashir, Hamdi A. "Models for estimating design effort." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0034/NQ64508.pdf.
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Solomons, Stanley Nicholls. "Conceptual models in industrial design." Thesis, De Montfort University, 1988. http://hdl.handle.net/2086/4144.
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Pohl, Thomas. "Design of adaptable simulation models." Thesis, Sheffield Hallam University, 2006. http://shura.shu.ac.uk/20240/.
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In today's world, with ever increasing competition, modelling and simulation proves to be a very helpful tool. Many methodologies exist to help build a simulation model from scratch. In terms of adaptability, most current attempts focus on either the operational side, ie the automated integration of data into a model, or the creation of new software. However, very few attempts are being made to improve the adaptability of shelved models built in existing simulation software. As a result, there is a certain reluctance, in some areas, to use simulation to its full potential. Based on these facts, it is obvious that anything, which makes reuse of simulation models easier, can help improve the use and spread of simulation as a valuable tool to maintain a company's competitiveness. In order to find such a solution, the following issues are looked at in this thesis: The changes to a simulation model that constitute the biggest problem, ways to minimise those changes, and possibilities to simplify the implementation of those changes. Those factors are evaluated, first by investigating current practices of building adaptable simulation models via a literature review, then the most difficult changes to implement in a simulation model, and the most frequent types of simulation software, are identified by means of interviews and questionnaire surveys. Next, parameters describing the adaptability of a simulation model are defined. In a further step, two of the most widely used simulation packages are benchmarked against a variety of tasks, reflecting the changes most frequent to models. The benchmarking study also serves to define and test certain elements regarding their suitability for adaptable models. Based on all those steps, model building guidelines for the creation of adaptable simulation models are developed and then validated by means of interviews and a framed field experiment. The interviews and questionnaire reveal that deleting is the easiest task and modifying the most complicated, while handling devices are the most difficult element to modify. The results also show that simulators (eg Arena) are the most widespread type of simulation software. The benchmarking showed that Arena is overall more adaptable than Simul8, and confirms the findings from the user survey. Also, it shows that sequencing is very helpful for modifying models, while the use of sub-models decrease the adaptability. Finally, the validation proves that the model building guidelines substantially increase the adaptability of models.
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Carlos, Monteiro Ponce de Leon Antonio. "Optimum experimental design for model discrimination and generalized linear models." Thesis, London School of Economics and Political Science (University of London), 1993. http://etheses.lse.ac.uk/2434/.
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The main subject of this thesis concerns the optimum design of experiments for discriminating between two rival mathematical models. In addition, optimality of designs for parameter estimation is investigated although restricted to binary response models. Optimal design theory and generalized linear models form the background for this work. The former provides the tools for construction of the optimum designs whereas the latter provides the framework in which the methods are developed. For model discrimination the procedures which are proposed may not only be applied to compare two regression models but also to compare two generalized linear models as long as they belong to the same subclass. The principle of the so called T-optimality criterion, originally introduced for discriminating between two regression models, is extended to other classes such as generalized linear models. Within each context a theorem based on the General Equivalence Theorem from the optimal design theory is shown to hold thus allowing both constructing and checking optimum designs. Optimum experimental designs to estimate the parameters of a binary response model is the other subject of this thesis. Initially, well known link functions such as logit, probit and complementary log-log are considered. Later, this range is widened by introducing a family of link functions which includes the logit and the complementary log-log links as particular members. One common feature of these two problems is that classical optimal designs depend on the unknown values of the model parameters. Therefore, only locally optimal designs can be obtained unless observations may be taken sequentially, in which case several methods to search for the optimum are available in the literature. As an alternative to locally and sequentially optimal experiments, Bayesian designs are introduced for both model discrimination and parameter estimation.
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Wong, Chung-ho Richard. "Manipulating configurable architecture models using hierarchical structure /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B24733799.
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Kutluay, Umit. "Design Scaling Og Aeroballistic Range Models." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605698/index.pdf.
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The aim of this thesis is to develop a methodology for obtaining an optimum configuration for the aeroballistic range models. In the design of aeroballistic range models, there are mainly three similarity requirements to be matched between the model and the actual munition: external geometry, location of the centre of gravity and the ratio of axial mass moment of inertia to the transverse mass moment of inertia. Furthermore, it is required to have a model with least possible weight, so that the required test velocities can be obtained with minimum chamber pressure and by use of minimum propellant while withstanding the enormous launch accelerations. This defines an optimization problem: to find the optimum model internal configuration and select materials to be used in the model such that the centre of gravity location and the inertia ratio are matched as closely as possible while the model withstands the launch forces and has minimum mass. To solve this problem a design methodology is devised and an optimization code is developed based on this methodology. Length, radius and end location of an optimum cylinder which has to be drilled out from the model are selected as the design variables for the optimization problem. Built&ndashin functions from the Optimization Toolbox of Matlab®
are used in the optimization routine, and also a graphical user interface is designed for easy access to the design variables. The developed code is a very useful tool for the designer, although the results are not meant to be directly applied to the final product, they form the starting points for the detailed design.
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Aitken, James Stuart. "New models for expert system design." Thesis, University of Glasgow, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260569.
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Monadjemi, Farinaz. "Optimal experimental design for nonlinear models." Thesis, University of Sheffield, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444579.
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Bugtai, Nilo T. "Fixturing information models in data model-driven product design and manufacture." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/34654.
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In order to ensure effective decisions are made at each stage in the design and manufacture process, it is important that software tools should provide sufficient information to support the decision making of both designers and manufacturing engineers. This requirement can be applied to fixturing where research to date has typically focused on narrow functional support issues in fixture design and planning. The research reported in this thesis has explored how models of fixturing information can be defined, within an integrated information environment, and utilised across product design as well as manufacture. The work has focused on the definition of fixturing information within the context of a wide-ranging model that can capture the full capability of a manufacturing facility.
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Chandrasekhar, Ashok. "Interfacing geometric design models to analyzable product models with multifidelity and mismatched analysis geometry." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17769.
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Zhang, Ying. "Bayesian D-Optimal Design for Generalized Linear Models." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/30147.
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Bayesian optimal designs have received increasing attention in recent years, especially in biomedical and clinical trials. Bayesian design procedures can utilize the available prior information of the unknown parameters so that a better design can be achieved. However, a difficulty in dealing with the Bayesian design is the lack of efficient computational methods. In this research, a hybrid computational method, which consists of the combination of a rough global optima search and a more precise local optima search, is proposed to efficiently search for the Bayesian D-optimal designs for multi-variable generalized linear models. Particularly, Poisson regression models and logistic regression models are investigated. Designs are examined for a range of prior distributions and the equivalence theorem is used to verify the design optimality. Design efficiency for various models are examined and compared with non-Bayesian designs. Bayesian D-optimal designs are found to be more efficient and robust than non-Bayesian D-optimal designs. Furthermore, the idea of the Bayesian sequential design is introduced and the Bayesian two-stage D-optimal design approach is developed for generalized linear models. With the incorporation of the first stage data information into the second stage, the two-stage design procedure can improve the design efficiency and produce more accurate and robust designs. The Bayesian two-stage D-optimal designs for Poisson and logistic regression models are evaluated based on simulation studies. The Bayesian two-stage optimal design approach is superior to the one-stage approach in terms of a design efficiency criterion.Ph. D.
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Azimifar, Seyedeh-Zohreh. "Image Models for Wavelet Domain Statistics." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/938.
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Statistical models for the joint statistics of image pixels are of central importance in many image processing applications. However the high dimensionality stemming from large problem size and the long-range spatial interactions make statistical image modeling particularly challenging. Commonly this modeling is simplified by a change of basis, mostly using a wavelet transform. Indeed, the wavelet transform has widely been used as an approximate whitener of statistical time series. It has, however, long been recognized that the wavelet coefficients are neither Gaussian, in terms of the marginal statistics, nor white, in terms of the joint statistics.
The question of wavelet joint models is complicated and admits for possibilities, with statistical structures within subbands, across orientations, and scales. Although a variety of joint models have been proposed and tested, few models appear to be directly based on empirical studies of wavelet coefficient cross-statistics. Rather, they are based on intuitive or heuristic notions of wavelet neighborhood structures. Without an examination of the underlying statistics, such heuristic approaches necessarily leave unanswered questions of neighborhood sufficiency and necessity.
This thesis presents an empirical study of joint wavelet statistics for textures and other imagery including dependencies across scale, space, and orientation. There is a growing realization that modeling wavelet coefficients as independent, or at best correlated only across scales, may be a poor assumption. While recent developments in wavelet-domain Hidden Markov Models (notably HMT-3S) account for within-scale dependencies, we find that wavelet spatial statistics are strongly orientation dependent, structures which are surprisingly not considered by state-of-the-art wavelet modeling techniques.
To demonstrate the effectiveness of the studied wavelet correlation models a novel non-linear correlated empirical Bayesian shrinkage algorithm based on the wavelet joint statistics is proposed. In comparison with popular nonlinear shrinkage algorithms, it improves the denoising results.
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Nordqvist, Rune. "Effective Sampling Design for Groundwater Transport Models." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2001. http://publications.uu.se/theses/91-554-5040-7/.
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黃仲豪 and Chung-ho Richard Wong. "Manipulating configurable architecture models using hierarchical structure." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31223618.
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Yang, Dong-Shan. "Deformation-based seismic design models for waterfront structures." Thesis, online access from Digital Dissertation Consortium access full-text, 1999. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?9933214.
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Alcoforado, Neto Manoel Guedes [UNESP]. "Metodologia de design mediada por protótipos." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/110873.
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000797407.pdf: 25465836 bytes, checksum: 24d2d3f2b43664ad300e270ae84dae95 (MD5)Nas metodologias de design observamos a importância dos protótipos. Porém, constatamos que a sua utilização é deixada para as fases finais do projeto, o que limita a avaliação do design. O termo protótipo tem sido usado para designar uma versão final do projeto. Contudo, podemos tratá-los de uma forma mais ampla como: uma aproximação do produto, dos sistema ou de seus componentes, o que permite classificá-los em baixa, média e alta fidelidade. Ao considerarmos os protótipos como artefatos mediadores de informação e comunicação, poderemso utilizá-lo como ferramenta de gestão de design. O gerenciamento e comparação das informações sobre a funcionalidade, usabilidade e estética das alternativas permitem realizar uma seleção mais precisa. O propósito do protótipo, os estágios de utilização e a emergência de novas tecnologias de prototipagem e manufatura virtual e rápida, favorecem sua maior utilização e permitiram a criação de uma nova metodologia de design. Essa auxiliará os designers no desenvolvimento dos projetos, através da escolha do protótipo mais adequado a cada área, fase, estágio e propósito de design. Nesse sentido, nessa pesquisa, construímos e validamos uma metodologia denominada: Metodologia de Design Mediada por protótipos. Metodologia essa que coloca o protótipo no centro do processo de Design criando um processo de design centrado nos protótipos
We have observed in the methodologies of the importance of design prototypes. However, we not that its use is left to the final stages of the project, which limit the design evaluation. The term prototype has been used to designate a final version of the project. However, we can treat them more widely as an approximation of the product, system or its components, which can be classified as low, medium and high fidelity. When we consider the prototype artifacts as mediators of information and communication, we use it as a design management tool. The management and comparison of information on the functionality, usability and aesthetcs of alternative perfom a more precise selection. The purpose of the prototype stages of use and the emergence of new technologies and virtual prototyping and rapid manufacturing, encourage their greater use and allowed the creation of a new design methodology. This will assist designers in the development of projects by choosing the most appropriate to each area, stage, stage design and purpose of the prototype. Accordingly, in this research, we constructed and validated a methodology called Design Methodology Mediated prototypes. methodology that puts this prototype in the center of the design process by creating a process-centered design in the prototypes
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Alcoforado, Neto Manoel Guedes. "Metodologia de design mediada por protótipos /." Bauru, 2014. http://hdl.handle.net/11449/110873.
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Orientador: José Carlos Plácido da SilvaBanca: João Eduardo Guarnetti dos Santos
Banca: Júlio Carlos de Souza Van der Linden
Banca: Paulo Kawauchi
Banca: João Roberto Gomes de Faria
Resumo: Nas metodologias de design observamos a importância dos protótipos. Porém, constatamos que a sua utilização é deixada para as fases finais do projeto, o que limita a avaliação do design. O termo protótipo tem sido usado para designar uma versão final do projeto. Contudo, podemos tratá-los de uma forma mais ampla como: uma aproximação do produto, dos sistema ou de seus componentes, o que permite classificá-los em baixa, média e alta fidelidade. Ao considerarmos os protótipos como artefatos mediadores de informação e comunicação, poderemso utilizá-lo como ferramenta de gestão de design. O gerenciamento e comparação das informações sobre a funcionalidade, usabilidade e estética das alternativas permitem realizar uma seleção mais precisa. O propósito do protótipo, os estágios de utilização e a emergência de novas tecnologias de prototipagem e manufatura virtual e rápida, favorecem sua maior utilização e permitiram a criação de uma nova metodologia de design. Essa auxiliará os designers no desenvolvimento dos projetos, através da escolha do protótipo mais adequado a cada área, fase, estágio e propósito de design. Nesse sentido, nessa pesquisa, construímos e validamos uma metodologia denominada: "Metodologia de Design Mediada por protótipos". Metodologia essa que coloca o protótipo no centro do processo de Design criando um processo de design centrado nos protótipos
Abstract: We have observed in the methodologies of the importance of design prototypes. However, we not that its use is left to the final stages of the project, which limit the design evaluation. The term prototype has been used to designate a final version of the project. However, we can treat them more widely as an approximation of the product, system or its components, which can be classified as low, medium and high fidelity. When we consider the prototype artifacts as mediators of information and communication, we use it as a design management tool. The management and comparison of information on the functionality, usability and aesthetcs of alternative perfom a more precise selection. The purpose of the prototype stages of use and the emergence of new technologies and virtual prototyping and rapid manufacturing, encourage their greater use and allowed the creation of a new design methodology. This will assist designers in the development of projects by choosing the most appropriate to each area, stage, stage design and purpose of the prototype. Accordingly, in this research, we constructed and validated a methodology called "Design Methodology Mediated prototypes". methodology that puts this prototype in the center of the design process by creating a process-centered design in the prototypes
Doutor
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Atefi, Katayoun. "Formal models of business process reengineering for design and design validation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ29422.pdf.
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Chomtee, Boonorm. "Comparison of design optimality criteria of reduced models for response surface designs in a spherical design region." Diss., Montana State University, 2003. http://etd.lib.montana.edu/etd/2003/chomtee/ChomteeB_03.pdf.
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In this dissertation, the major objective is to compare 3 and 4 factor response surface designs in a spherical design region by studying design optimality criteria (D, A, G, and IV-criteria) over sets of reduced models. Hence, theoretical and computational details of evaluating optimality criteria for reduced models for response surface designs in a spherical design region have been described. Specifically, robustness results of the spherical response surface designs and the comparison of design optimality criteria of the response surface designs across the full second-order model and sets of reduced models for 3 and 4 design variables based on the four optimality criteria (D, A, G, and IV-criteria) are presented. Also, new types of D, A, G, and IV optimality criteria for response surface designs in a spherical design region are developed by using prior probability assignment to model effects (for some specified values of pl, pq, p 1, and p2). The four new D, A, G , and IV optimality criteria will be referred to as weighted design optimality criteria. The weighted design optimality criteria of the response surface designs across the weak heredity and strong heredity reduced models for 3 and 4 design variables are evaluated.
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Leensel, Robert Laurentius Maria Johannes van de. "Models and algorithms for telecommunication network design." Maastricht : Maastricht : Universiteit Maastricht ; University Library, Maastricht University [Host], 1999. http://arno.unimaas.nl/show.cgi?fid=7535.
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Braga, AntoÌ‚nio de PaÌdua. "Design models for recursive binary neural networks." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336442.
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Englezou, Yiolanda. "Bayesian design for calibration of physical models." Thesis, University of Southampton, 2018. https://eprints.soton.ac.uk/427145/.
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We often want to learn about physical processes that are described by complex nonlinear mathematical models implemented as computer simulators. To use a simulator to make predictions about the real physical process, it is necessary to rst perform calibration; that is, to use data obtained from a physical experiment to make inference about unknown parameters whilst acknowledging discrepancies between the simulator and reality. The computational expense of many simulators makes calibration challenging. Thus, usually in calibration, we use a computationally cheaper approximation to the simulator, often referred to as an emulator, constructed by tting a statistical model to the results of a relatively small computer experiment. Although there is a substantial literature on the choice of the design of the computer experiment, the problem of designing the physical experiment in calibration is much less well-studied. This thesis is concerned with methodology for Bayesian optimal designs for the physical experiment when the aim is estimation of the unknown parameters in the simulator. Optimal Bayesian design for most realistic statistical models, including those incorporating expensive computer simulators, is complicated by the need to numerically approximate an analytically intractable expected utility; for example, the expected gain in Shannon information from the prior to posterior distribution. The standard approximation method is "double-loop" Monte Carlo integration using nested sampling from the prior distribution. Although this method is easy to implement, it produces biased approximations and is computationally expensive. For the Shannon information gain utility, we propose new approximation methods which combine features of importance sampling and Laplace approximations. These approximations are then used within an optimisation algorithm to nd optimal designs for three problems: (i) estimation of the parameters in a nonlinear regression model; (ii) parameter estimation for a misspecied regression model subject to discrepancy; and (iii) estimation of the calibration parameters for a computational expensive simulator. Through examples, we demonstrate the advantages of this combination of methodology over existing methods.
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Li, Xinyang. "Evolutionary mechanism design using agent-based models." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558876.
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This research complements and combines market microstructure theory and mechanism design to optimize the market structure of financial markets systematically. We develop an agent-based model featuring near-zero-intelligence traders operating in a call market with a wide range of trading rules governing the determination of prices, which orders are executed as well as a range of parameters regarding market intervention by market makers and the presence of informed traders. The market structure which generates the best market performance is determined by applying the search technique Population-based Incremental Learning, guided by a number of performance measures, including maximizing trading volume or price, minimizing bid-ask spread or return volatility. We investigate the credibility of our model by observing the trading behavior of near-zero-intelligence traders with stylized facts in real markets. Based on computer simulations, we conform that the model is capable to reproduce some of the most important stylized facts found in financial markets. Thereafter, we investigate the best found market structure using both single-objective optimization and multi-objective optimization techniques. Our results suggest that the best-found combination of trading rules used to enhance trading volume may not be applied to achieve other objectives, such as reducing bid-ask spread. The results of single-objective optimization experiments show that significantly large tick sizes appear in the best market structures in most cases, except for the case of maximizing trading volume. The tick size is always correlated with the selection of multi-price rules. Though there is no particular combination of priority rule and multiprice rule achieving the best market performance, the time priority rule and the closest multi-price rule are the most frequently obtained rules. The level of market transparency and the extend of market maker intervention show ambiguous results as their representative parameter values change in a wide range. We also nd that the results of multi-objective optimization experiments are much similar to those obtained in the single-objective optimization experiments, except for the market transparency represented by the fraction of informed trader, which shows a clear trend in the multi-objective optimization. Using the results obtained from this research we can derive recommendations for exchanges and regulators on establishing the optimal market structure; for securities issuers on choosing the best exchange for their listing; and for investors on choosing the most suitable exchange for trading.
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Gonzalez-Zugasti, Javier P. (Javier Patricio) 1965. "Models for platform-based product family design." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9300.
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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.Includes bibliographical references (p. 95-97).
Platform-based product families have been an effective way for companies to offer increased variety into markets, while containing the resulting complexity of developing large numbers of products. A product platform is the set of resources - components, processes, technologies, and knowledge - that are shared across multiple products offered by a firm. The products derived from that common platform are called the variants, and the set of variants forms a product family. This thesis presents a theoretical basis for modeling the design of platform-based product families, as well as practical implementations based on those models. The problem is formulated as an optimization, where the requirements of the desired variants must be balanced against family objectives, such as maximizing the value of developing the family. A general case is formulated that covers the effects of using a platform-based design on the benefits and investments required to produce the desired family. The problem is then simplified into a two-step optimization approach to apply it to actual design situations for complex products. The first stage considers the technical details of creating feasible product families that satisfy the variants' requirements while optimizing the expected value to the firm. The second stage evaluates the design alternatives generated by the first step, considering the effects of uncertainty during the actual development of the family on its value to the firm. This evaluation is then used to select the most appropriate choice of family design. A case study of the design of multiple NASA exploratory space missions based on alternative telecommunications technology platforms is shown. Applying the approach resulted in several alternative family designs, some of which had not been previously considered viable. The resulting candidate designs were evaluated through the use of decision analysis models developed in this thesis, which calculate the value to the firm of each design. Simulation was then used to evaluate the value of each alternative and its flexibility to changes in uncertain factors during the development process. As a reference, a Pugh-type selection method (a qualitative, multi-criteria approach) was also explored and applied to the example of platform-based spacecraft design.
by Javier P. Gonzalez-Zugasti.
Ph.D.
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Abel, Robert B. "Experimental design for multilinear models in spectrofluoroscopy /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487693923198966.
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Poss, Michaël. "Models and algorithms for network design problems." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209968.
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Dans cette thèse, nous étudions différents modèles, déterministes et stochastiques, pour les problèmes de dimensionnement de réseaux. Nous examinons également le problème du sac-à-dos stochastique ainsi que, plus généralement, les contraintes de capacité en probabilité.\
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
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Anjum, Maria. "Design models for service-based software application." Thesis, Durham University, 2013. http://etheses.dur.ac.uk/7343/.
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Context: The use of a Service Oriented Architecture (SOA) offers a new and distinct approach to creating software based applications (SBAs) around the idea of integrating distributed autonomous computing resources. A widely available realisation of an SOA exists in the form of web services. However, to date no standard techniques have emerged for developing SBAs. There is also a lack of consistency in describing the concept itself, and the published literature offers little evidence derived from the experience of developing `real world examples. Aims: The objective of the work described in this thesis was to conduct a series of studies to explore systematically the concept of what constitutes an SOA by using the published literature, to employ this to construct a proof of concept SOA design model based on a real world problem, and in doing so, to investigate how well existing design notations are able to support this architectural style. Method: The research described in this thesis has been conducted in an evolutionary manner by employing a range of empirical methods. A mapping study was performed to investigate how the concept of SOA is interpreted by the research community. Based upon this model of SOA, a participant-observer case study was employed to construct an SOA design model and a use case model for an energy engineering application to demonstrate use for a real world problem. Finally, expert knowledge was employed for evaluation of the case study through the use of walkthroughs. Results: From the mapping study we created an integrated model of what constitutes an SOA for the use with the case study. The case study outcomes include a design for a renewable energy control system together with codified experience of constructing and recording the SOA design model. The experience of employing the walkthrough method for evaluation, and the outcomes of the evaluation are also discussed. Conclusion: From this research we conclude that the SOA research community needs to develop a clearer shared understanding and agreement on the model of what constitutes an SOA and the vocabulary used to describe the SOA concept. This will aid designers to communicate their mental models more effectively and will provide the semantics needed for devising the new notations that this study implies are needed for SBA design. Further, some lessons about SBA design have been derived from the case study experiences.
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Vastola, Justin Timothy. "Sequential experimental design under competing prior knowledge." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/47724.
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This research focuses on developing a comprehensive framework for designing and modeling experiments in the presence of multiple sources of competing prior knowledge. In particular, methodology is proposed for process optimization in high-cost, low-resource experimental settings where the underlying response function can be highly non-linear. In the first part of this research, an initial experimental design criteria is proposed for optimization problems by combining multiple, potentially competing, sources of prior information--engineering models, expert opinion, and data from past experimentation on similar, non-identical systems. New methodology is provided for incorporating and combining conjectured models and data into both the initial modeling and design stages. The second part of this research focuses on the development of a batch sequential design procedure for optimizing high-cost, low-resource experiments with complicated response surfaces. The success in the proposed approach lies in melding a flexible, sequential design algorithm with a powerful local modeling approach. Batch experiments are designed sequentially to adapt to balance space-filling properties and the search for the optimal operating condition. Local model calibration and averaging techniques are introduced to easily allow incorporation of statistical models and engineering knowledge, even if such knowledge pertains to only subregions of the complete design space. The overall process iterates between adapting designs, adapting models, and updating engineering knowledge over time. Applications to nanomanufacturing are provided throughout.
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Wu, Guangxi. "Sensitivity and uncertainty analysis of subsurface drainage design." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28529.
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Literature on subsurface drainage theories, determination of drainage parameters, and analysis approaches of uncertainty was reviewed. Sensitivity analysis was carried out on drain spacing equations for steady state and nonsteady state, in homogeneous soils and in layered soils. It was found that drain spacing is very sensitive to the hydraulic conductivity,
the drainage coefficient, and the design midspan water table height. Spacing is not sensitive to the depth of the impermeable layer and the drain radius. In transient state, spacing is extremely sensitive to the midspan water table heights if the water table fall is relatively small. In that case steady state theory will yield more reliable results and its use is recommended. Drain spacing is usually more sensitive to the hydraulic conductivity
of the soil below the drains than to that of the soil above the drains. Therefore, it is desirable to take samples from deeper soil when measuring hydraulic conductivity. A new spacing formula was developed for two-layered soils and a special case of three-layered soils with drains at the interface of the top two layers. This equation was compared with the Kirkham equation. The new formula yields spacings close to the Kirkham equation if the hydraulic conductivity of the soil above the drains is relatively small; otherwise, it tends to give more accurate results. First and second order analysis methods were employed to analyze parameter uncertainty in subsurface drainage design. It was found that conventional design methods based on a deterministic framework may result in inadequate
spacing due to the uncertainty involved. Uncertainty may be incorporated into practical design by using the simple equations and graphs presented in this research; the procedure was illustrated through an example. Conclusions were drawn from the present study and recommendations were made for future research.Applied Science, Faculty of
Graduate
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Thompson, David Charles. "Feasibility of a skeletal modeler for conceptual mechanical design /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3004386.
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LeBlanc, Andrew Roland. "Engineering design decomposition." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/16044.
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Costa, Daniel Guzzo da. "The uses and users of design process models in organizations." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18156/tde-28092016-163657/.
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The use of design process models is of great importance for developing better products. Indeed, it is one of the factors that may differentiate the best companies from the rest. However, their adoption in companies is declining. Usefulness and usability issues may be responsible for process models not to meet the needs of its users. The goal of this research is to provide deeper understanding of the users needs of design process models. Three main perspectives are provided: (1) why organizations use process models, (2) who are the users of process models, and (3) how the context of use of process models is. The research methodology adopted was the Design Research Methodology (DRM). Three stages were performed: (i) Research Clarification, (ii) Descriptive Study I, and (iii) Prescriptive Study. In the first stage, an initial literature review was carried out to collect evidences of why researching process models and their users needs is relevant for the design theory. During the second stage (Descriptive Study I), literature was reviewed to identify the purposes of use of design process models and its potential users; a focusgroup section with 24 subject matter experts was carried out to evaluate these purposes and identify process model users; and, lastly, a case study was perfomed to investigate the context of use of design process models in one organization and to portray the profile of the core users. Finally, the third stage (Prescriptive Study) aimed to uncover directions for organizations develop user-centered design process models. Four main results were achieved through this research. The first result is a deep understanding of three types of application of the design process models: (a) develop the design activity, (b) manage the design project, and (c) improve the design process. The purposes for these aplications were investigated and their level of importance were revealed. In addition, it was mapped the core users of process models for the three applications. The second result is the definition of the context of use of the models.Three dimensions of the context were depicted: the product, the design process, and the organizational structure. The third result is the set of users profiles. Empathy Maps were elaborated to represent the profiles of product engineers, project managers, and technical leaders. The last result consists in recommendations regarding the content provided to users and the process models system design. Finally, industrial practitioners will benefit from this research once it was provided evidences that the activity development application type is not properly considered in organization and that important users needs are not getting proper attention in the current models. Therefore, they will be able to make use of the recommendations outlined here.O uso de modelos de processo de design é de grande importância no desenvolvimento de novos produtos. De fato, isto é um dos fatores que pode diferenciar as melhores empresas das outras. De qualquer modo, a adoção dos modelos nas empresas esta declinando. Problemas em utilidade e usabilidade podem ser responsáveis pelos modelos não satisfazerem as necessidades de seus usuários. Nesta pesquisa, busca-se entender as necessidades dos usuários dos modelos de processo de design. Três perspectivas são dadas: (1) porquê organizações usam modelos de processo, (2) quem são os usuários dos modelos de processo e (3) como é o contexto de uso de modelos de processo. A metodologia de pesquisa adotada foi a Metodologia de Pesquisa em Design (DRM). Três estágios foram realizados: (i) Clarificação de Pesquisa, (ii) Estudo Descritivo I, e (iii) Estudo Prescritivo. No primeiro estágio, uma revisão inicial da literatura foi executada para coletar evidências do porquê estudar modelos de processo e as necessidades de seus usuários é relevante para a teoria de design. No segundo estágio (Estudo Descritivo I), revisão da literatura ajudou a identificar os propósitos de uso de modelos de processo de design e os seus potenciais usuários; uma seção de focus group com 24 especialistas no assunto foi executado para avaliar estes propósitos e identificar usuários dos modelos de processo; e, por fim, um estudo de caso foi realizado para investigar o contesto de uso dos modelos em uma organização e para retratar o perfil dos usuários principais. Finalmente, o terceiro estágio (Estudo Prescritivo) buscou revelar direções para que as organizações desenvolvam modelos de processo de design centrados em seus usuários. Quatro principais resultados foram alcançados por meio desta pesquisa. O primeiro resultado é um entendimento profundo dos três tipos de aplicação dos modelos de processo: (a) desenvolver atividade de design, (b) gerenciar o projeto de design, e (c) melhorar o processo de design. O propósito destas três aplicações foram investigadas e os níveis de importância evidenciados. Além disso, os usuários centrais dos modelos de processo foram mapeados. O segundo resultado é a definição do contexto de uso dos modelos. Três dimensões do contexto foram retratados: o produto, o processo de design, e a estrutura organizacional. O terceiro resultado é o conjunto de perfis dos usuários. Mapas de Empatia foram elaborados para representar os perfis de engenheiros de produto, gerentes de projeto, e líderes técnicos. O último resultado consiste em recomendações feitas a respeito do conteúdo fornecido aos usuários e o sistema a ser desenvolvido. Finalmente, profissionais da indústria podem beneficiar desta pesquisa uma vez que evidências são fornecidas de que a aplicação de desenvolvimento das atividades não é adequadamente considerada em organizações e que necessidades importantes dos usuários não recebem atenção satisfatória nos modelos atuais. Sendo assim, eles serão capazes de fazer uso das recomendações aqui feitas.
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Sandhu, Manjinder Kaur. "Optimal designs for mixture models." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31213583.
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Jessop, Alan Thomas. "Multiattribute models for engineering evaluation." Thesis, Heriot-Watt University, 1999. http://hdl.handle.net/10399/1226.
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Hu, Jiangxia S. M. Massachusetts Institute of Technology. "Business models of information aggregators." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43171.
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Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2008.Includes bibliographical references.
This thesis identifies the specific characteristics of information aggregators, and proposes nine business models appropriate for information aggregators. These nine models are: advertising, brokerage, subscription, licensing, infomediary (information intermediaries), referral/click-through, customized/personalized service, professional service/consulting, and application service provider. The thesis then looks into various companies who base their businesses on information aggregation and analyzes the development of their business models in the context of competition. The financial and social performances of these companies are studied and reasons are explored. In the end, the thesis summarizes findings from case studies, lists the widely used business models and the rarely used ones, and explores reasons for this phenomenon. The conclusion of this research is that information aggregation is a start point for a company to develop differentiated product or services. Companies can develop into an independent information aggregators; they can use information aggregation as a platform; they can partner with aggregatees or customers to provide customized information. Eventually, many will be integrated into end-to-end solutions, or penetrate into traditional businesses by leveraging information aggregation. The research can be used by companies who develop information aggregation products or services. It can also be used to evaluate the viability of information aggregation initiatives.
by Jiangxia Hu.
S.M.
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Costa, Carlos Alberto. "Product range models in injection mould tool design." Thesis, Loughborough University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327657.
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Marston, Matthew C. "Game based design : a game theory based approach to engineering design." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/15877.
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Bowen, Judith Alyson. "Formal Models and Refinement for Graphical User Interface Design." The University of Waikato, 2008. http://hdl.handle.net/10289/2613.
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Formal approaches to software development require that we correctly describe (or specify) systems in order to prove properties about our proposed solution prior to building it. We must then follow a rigorous process to transform our specification into an implementation to ensure that the properties we have proved are retained. When we design and build the user interfaces of our systems we are similarly keen to ensure that they have certain properties before we build them. For example, do they satisfy the requirements of the user? Are they designed with known good design principles and usability considerations in mind? User-centred design approaches, which incorporate many different techniques which we may consider as informal, seek to consider these issues so that the UIs we build are designed around the needs and capabilities of real users. Both formal methods and user-centred design are important and beneficial in the development of underlying system functionality and user interfaces respectively. Given this we would like to be able to use both approaches in one integrated software development process. Their differences, however, make this a challenging objective. In this thesis we present a solution this problem by describing models and techniques which provide a bridge between the existing work of user-centred design practitioners and formal methods practitioners enabling us to incorporate (representations of) informal design artefacts into a formal software development process. We then use these models as the basis for a refinement theory for user interfaces which allows interface designers to retain their informal design methods whilst providing an underlying theory grounded in the trace refinement theory of the Microcharts language.
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Sivaraman, Gokul. "Development of PMSM and drivetrain models in MATLAB/Simulink for Model Based Design." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-301027.
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When developing three-phase drives for Electric Vehicles (EVs), it is essential to verify the controller design. This will help in understanding how fast and accurately the torque of the motor can be controlled. In order to do this, it is always better to test the controller using the software version of the motor or vehicle drivetrain than using actual hardware as it could lead to component damage when replicating extreme physical behavior. In this thesis, plant modelling of Permanent Magnet Synchronous Machine (PMSM) and vehicle drivetrain in MATLAB/Simulink for Model Based Design (MBD) is presented. MBD is an effective method for controller design that, if adopted can lead to cost savings of 25%-30% and time savings of 35%-40% (according to a global study by Altran Technologies, the chair of software and systems engineering and the chair of Information Management of the University of Technology in Munich) [1]. The PMSM plant models take effects like magnetic saturation, cross- coupling, spatial harmonics and temperature into account. Two PMSM models in d-q frame based on flux and inductance principles were implemented. Flux, torque maps from Finite Element Analysis (FEA) and apparent inductance from datasheets were used as inputs to the flux- and inductance-based models, respectively. The FEA of PMSM was done using COMSOL Multiphysics. The PMSM model results were compared with corresponding FEA simulated results for verification. A comparison of these PMSM models with conventional low fidelity models has also been done to highlight the impact of inclusion of temperature and spatial harmonics. These motor models can be combined with an inverter plant model and a controller can be developed for the complete model. Low frequency oscillations of drivetrain in EVs lead to vibrations which can cause discomfort and torsional stresses. In order to control these oscillations, an active oscillation damping controller can be implemented. For implementation of this control, a three-mass mechanical plant model of drivetrain with an ABS (Anti-lock Braking System) wheel speed sensor has been developed in this thesis. Analysis of the model transfer function to obtain the pole zero maps was performed. This was used to observe and verify presence of low frequency oscillations in the drivetrain. In order to include the effects of ABS wheel speed sensor and CAN communication, a model was developed for the sensor.Testning av regulatorernas inställningar med hänsyn till snabbhet och noggrannhet i momentreglering är avgörande i trefasiga drivsystem för elektriska fordon. Oftast är det bättre att simulera i stället för att utföra experimentella tester där komponenter kan skadas på grund av fysisk stress. Detta kallas för Model Based Design (MBD). MBD är an effektiv metod för utformningen av styrningen som kan leda till kostnadsbesparingar på 25%-30% och tidsbesparingar på 35%-40% enligt en studie från Altran Technologies i samarbete med Tekniska universitet i München, TUM. Detta examensarbete behandlar en modell för en synkronmaskin med permanentmagneter (PMSM) samt en modell för drivlinan utvecklad i Matlab/Simulink för MBD. PMSMs modellen inkluderar magnetisk mättnad och tvärkoppling, MMF övervågor och temperatur. Två PMSM modeller har utvecklats. Den första baseras på magnetiskt flöde som erhålls från finita element beräkningar i COMSOL Multiphysics medan den andra bygger på induktanser givna från datablad. En jämförelse av dessa PMSM-modeller med konventionella low fidelity-modeller har också gjorts för att illustrera påverkan temperaturberoende och MMF övervågor. Modellerna kan kombineras med en växelriktarmodell för att utveckla en hel styrenhet. Lågfrekventa oscillationer i drivlinan leder till vibrationer som kan orsaka vridspänningar och försämra komforten i elfordonet. En aktiv dämpningsregulator kan implementeras för att kontrollera spänningarna men en mekanisk drivlinemodell med tre massor och en ABS (anti-lock braking system) hastighetssensor behövs. Den mekaniska modellen har implementerats och analyserats även beaktande en modell för en CAN kommunikationskanal. Oscillationer med låg frekvens kunde observeras i modellen.
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Kauffman, Jordan A. G. "Success Metrics and Sustainable Business Models in Social Innovation Design Firms." Kent State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent1494954094304411.
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Gasparini, Riccardo. "Engineering Analysis in Imprecise Geometric Models." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1793.
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Engineering analysis in geometric models has been the main if not the only credible/reasonable tool used by engineers and scientists to resolve physical boundaries problems. New high speed computers have facilitated the accuracy and validation of the expected results. In practice, an engineering analysis is composed of two parts; the design of the model and the analysis of the geometry with the boundary conditions and constraints imposed on it.
Numerical methods are used to resolve a large number of physical boundary problems independent of the model geometry. The time expended due to the computational process are related to the imposed boundary conditions and the well conformed geometry. Any geometric model that contains gaps or open lines is considered an imperfect geometry model and major commercial solver packages are incapable of handling such inputs. Others packages apply different kinds of methods to resolve this problems like patching or zippering; but the final resolved geometry may be different from the original geometry, and the changes may be unacceptable. The study proposed in this dissertation is based on a new technique to process models with geometrical imperfection without the necessity to repair or change the original geometry. An algorithm is presented that is able to analyze the imperfect geometric model with the imposed boundary conditions using a meshfree method and a distance field approximation to the boundaries. Experiments are proposed to analyze the convergence of the algorithm in imperfect models geometries and will be compared with the same models but with perfect geometries. Plotting results will be presented for further analysis and conclusions of the algorithm convergence
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Kinnunen, Matti J. (Matti Juhani). "Complexity measures for system architecture models." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35109.
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Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2006.Includes bibliographical references (p. 93-95).
This thesis lays the necessary groundwork for measuring the complexity of systems architecture models. We propose a set of complexity measures, which are usable with models defined using the Object-Process Model (OPM). In order to do this, we introduce a new concept of interface complexity multiplier for compensating the hidden information at interfaces. We also define a set of complexity metrics for system architecture models. We also develop models for three different systems for mobile entertainment. The purpose of these models is to show how OPM is suitable for modeling such systems and also to provide some comparative material for complexity measurements. We use the new metrics to determine the complexity of the models of mobile entertainment systems. The thesis also contains a rigorous definition of complexity and a survey of existing complexity measurement methods.
by Matti J. Kinnunen.
S.M.
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Rabie, Huwaida. "Optimal designs for dose-finding in contingent response models." Diss., Columbia, Mo. : University of Missouri-Columbia, 2004. http://hdl.handle.net/10355/4083.
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Thesis (Ph. D.)--University of Missouri-Columbia, 2004.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (June 29, 2006) Vita. Includes bibliographical references.
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Hughes, Richard Sylvester. "The conceptual structure of product semantic models." Thesis, Brunel University, 1999. http://bura.brunel.ac.uk/handle/2438/4969.
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The study is concerned with the conceptual structure and content of the framework for characterising user-product interaction, proposed under the title – ‘Product Semantics’. The sources for the critique of design, from which the framework is derived, are identified and analysed, and the substantive theoretical and methodological content given initial consideration in terms of the deployment of the central concept of ‘meaning’, and the principal theoretical approaches adopted in the analysis of meaning and semantic concepts generally. The commitment to a cognitive and experiential approach to user-interaction is established and the concepts central to the framework, and requiring more detailed analysis, are identified. The core of the study consists in an analysis of the sequence of concepts and contexts that are chiefly used in the theoretical articulation of the framework, including - function, affordance, categorisation, artefacts, meaning and expression - of which the concept of affordance is central to the structure. On the basis of the initial consideration of the structure and content of the scheme, and in the light of the analysis of concepts, the explanatory structure of the framework is established. It is argued that the core commitment to an experiential and cognitive account, and the form of the explanatory structure, are jointly incompatible with the conceptual content of the framework, particularly in respect of the pivotal role of the concept of affordance. Proposals are advanced for an alternative interpretation which addresses the central issues of consistency and coherence, and which suggests an alternative approach to the conceptual characterisation of the framework and the form of the explanatory hierarchy. The implications of the framework, and the proposed alternative interpretation, are considered in respect of their application in shaping approaches to the development of design theory and methodology, and the experiential aspect of semantics and cognition.
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Hu, Cheng Lin. "Design optimization of fuzzy models in system identification." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2493501.
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