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Dissertations / Theses on the topic 'Object-Oriented Method'
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Dayao, Jonathan Enrique K. "Distributed object-oriented method (DOOM)." Thesis, University of Brighton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361578.
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Olivier, Albertus Hendrik. "Object-oriented finite element framework." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52971.
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Thesis (MScEng)--Stellenbosch University, 2002.ENGLISH ABSTRACT: The role of the computer has changed from a calculation tool to a tool that supports human thinking. In this thesis fundamental aspects of the Finite Element method are mapped to an object model with a well defined structure which provides for local and distributed analysis work. To achieve this the following was investigated: • An object-oriented framework for the Finite Element analysis method • An associated graphical user interface that enables the user to create and modify Finite Element models in an effective way • Requirements for the sharing of analysis information in a communication network Proposed solutions are implemented in a pilot application which indicates their potential.
AFRIKAANSE OPSOMMING: Die rol van die rekenaar het verander vanaf 'n gereedskapstuk wat berekening doen na 'n gereedskapstuk wat menslike denke ondersteun. In hierdie tesis word die fundamentele aspekte van die Eindige Element metode oorgedra na 'n objek model met 'n goed gedefinieerde struktuur wat lokale en verspreide analisering werk ondersteun. Om dit te bereik is die volgende ondesoek: • 'n Objek orienteerde raamwerk vir die Eindige Element metode • 'n Geassosieerde grafiese raamwerk wat die gebruiker in staat stelom objekte te skep en te verander • Vereistes vir die deel van analise inligting in 'n kommunikasie netwerk Die voorgestelde oplossing is geimplimenteer in 'n loodsimplementering wat die voordele van die benadering uitlig.
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Tews, Hendrik. "Coalgebraic Methods for Object-Oriented Specification." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2002. http://nbn-resolving.de/urn:nbn:de:swb:14-1035212977359-10343.
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This thesis is about coalgebraic methods in software specification and verification. It extends known techniques of coalgebraic specification to a more general level to pave the way for real world applications of software verification. There are two main contributions of the present thesis: 1. Chapter 3 proposes a generalisation of the familiar notion of coalgebra such that classes containing methods with arbitrary types (including binary methods) can be modelled with these generalised coalgebras. 2. Chapter 4 presents the specification language CCSL (short for Coalgebraic Class Specification Language), its syntax, its semantics, and a prototype compiler that translates CCSL into higher-order logicDie Dissertation beschreibt coalgebraische Mittel und Methoden zur Softwarespezifikation und -verifikation. Die Ergebnisse dieser Dissertation vereinfachen die Anwendung coalgebraischer Spezifikations- und Verifikationstechniken und erweitern deren Anwendbarkeit. Damit werden Softwareverifikation im Allgemeinen und im Besonderen coalgebraische Methoden zur Softwareverifikation der praktischen Anwendbarkeit ein Stück nähergebracht. Diese Dissertation enthält zwei wesentliche Beiträge: 1. Im Kapitel 3 wird eine Erweiterung des klassischen Begriffs der Coalgebra vorgestellt. Diese Erweiterung erlaubt die coalgebraische Modellierung von Klassenschnittstellen mit beliebigen Methodentypen (insbesondere mit binären Methoden). 2. Im Kapitel 4 wird die coalgebraische Spezifikationssprache CCSL (Coalgebraic Class Specification Language) vorgestellt. Die Bescheibung umfasst Syntax, Semantik und einen Prototypcompiler, der CCSL Spezifikationen in Logik höherer Ordnung (passend für die Theorembeweiser PVS und Isabelle/HOL) übersetzt
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Li, Zhilin. "Replace a NULL pointer by a null object using object-oriented method." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ39989.pdf.
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Shedd, Stephen F. "Semantic and syntactic object correlation in the object-oriented method for interoperability." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FShedd.pdf.
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Lawler, George M. "Distributed architecture for the object-oriented method for interoperability." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FLawler.pdf.
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Weng, Weimin. "A software framework method for network management system development." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358208.
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Silva, Araujo Joao Baptista da. "Metamorphosis : an integrated object oriented requirements analysis and specification method." Thesis, Lancaster University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337663.
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Zhu, Huan. "Investigation and Evaluation of Object Oriented Analysis techniques." Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1427.
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The technique of Object Oriented Analysis (OOA) has emerged only in the last decade. Although the technique of OOA is still new, its popularity has been increasing and it has already entered the mainstream of object oriented system development. This thesis makes a summary of four OOA methods and investigates the behaviors of all methods under different criteria. Through comparing the four methods, differences between methods are shown and analysts can select the appropriate one to meet his/her requirements.Polhemsgatan 27A 37140 Karlskrona Sweden Huanday@hotmail.com
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Gaspoz, Jean-Paul. "Object-oriented method and architecture for virtual private network service management /." [S.l.] : [s.n.], 1996. http://library.epfl.ch/theses/?nr=1446.
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Turner, Christopher David. "State-based testing : a new method for testing object-oriented programs." Thesis, Durham University, 1994. http://etheses.dur.ac.uk/5087/.
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State-based testing is a new method for testing object-oriented programs. The information stored in the state of an object is of two kinds: control-information and data-storage. The control-information transitions are modelled as a finite state automaton. Every operation of the class under test is considered as a mapping from starting states to a finishing states dependent upon the parameters passed. The possible parameter values are analysed for significant values which combined with the invocation of an operation can be used to represent stimuli applied to an object under test. State-based testing validates the expected transformations that can occur within a class. Classes are modelled using physical values assigned to the attributes of the class. The range of physical values is reduced by the use of a technique based on equivalence partitioning. This approach has a number of advantages over the conceptual modelling of a class, in particular the ease of manipulation of physical values and the independence of each operation from the other operations provided by an object. The technique when used in conjunction with other techniques provides an adequate level of validation for object-oriented programs. A suite of prototype tools that automate the generation of state-based test cases are outlined. These tools are used in four case studies that are presented as an evaluation of the technique. The code coverage achieved with each case study is analysed for the factors that affect the effectiveness of the state-based test suite. Additionally, errors have been seeded into 2 of the classes to determine the effectiveness of the technique for detecting errors on paths that are executed by the test suite. 92.5% of the errors seeded were detected by the state-based test-suite.
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Rivera, Francisco. "An object-oriented method of mission profile input for aircraft design." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09122009-040526/.
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Mungara, Mahesh Babu. "A Method for Systematically Generating Tests from Object-Oriented Class Interfaces." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9620.
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This thesis describes the development and evaluation of a manual black-box testing method inspired by Zweben's test adequacy criteria, which apply white-box analogues of all-DU-pairs and all-nodes to a flow graph generated from the black-box specification. The approach described herein generates tests from a matrix representation of a class interface based on the flow graph concept. In this process, separate matrices for all-DU-pairs and all-nodes guide the generation of the required tests. The primary goal of the research is not to optimize the number of tests generated but to describe the process in a user-friendly manner so that practitioners can utilize it directly, quickly, and efficiently for real-world testing purposes.
The approach has been evaluated to assess its effectiveness at detecting bugs. Both strategies - all-DU-pairs and all-nodes - were compared against three other testing methods: the commercial white-box testing tool Jtest, Orthogonal Array Testing Strategy (OATS), and test cases generated at random. The five approaches were applied across a sample of eleven java classes selected from java.util.*. Experimental results indicate that the two versions resulting from this research performed on par with or better than their respective equivalent approaches. The all-DU-pairs method performed better than all other approaches except for the random approach, with which it compared equally. Experimental evaluation results thus indicate that an automated approach based on the manual method is worth exploring.Master of Science
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Oppenheimer, Frank. "OOCOSIM an object-oriented co-design method for embedded HW-SW systems /." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974181447.
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Dwiartanto, Johannes. "Exploiting method semantics in client cache consistency protocols for object-oriented databases." Thesis, University of Newcastle Upon Tyne, 2006. http://hdl.handle.net/10443/2096.
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Data-shipping systems are commonly used in client-server object-oriented databases. This is intended to utilise clients' resources and improve scalability by allowing clients to run transactions locally after fetching the required database items from the database server. A consequence of this is that a database item can be cached at more than one client. This therefore raises issues regarding client cache consistency and concurrency control. A number of client cache consistency protocols have been studied, and some approaches to concurrency control for object-oriented datahases have been proposed. Existing client consistency protocols, however, do not consider method semantics in concurrency control. This study proposes a client cache consistency protocol where method se- mantic can be exploited in concurrency control. It identifies issues regarding the use of method semantics for the protocol and investigates the performance using simulation. The performance re- sults show that this can result in performance gains when compared to existing protocols. The study also shows the potential benefits of asynchronous version of the protocol.
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Dragan, Natalia. "The Emergent Laws of Method and Class Stereotypes in Object Oriented Software." Kent State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=kent1290570321.
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Guernsey, Bryan James. "A LOCALLY CORRECTED NYSTRM METHOD FOR SURFACE INTEGRAL EQUATIONS: AN OBJECT ORIENTED APPROACH." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_theses/460.
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Classically, researchers in Computational Physics and specifically in Computational Electromagnetics have sought to find numerical solutions to complex physical problems. Several techniques have been developed to accomplish such tasks, each of which having advantages over their counterparts. Typically, each solution method has been developed separately despite having numerous commonalities with other methods. This fact motivates a unified software tool to house each solution method to avoid duplicating previous efforts. Subsequently, these solution methods can be used alone or in conjunction with one another in a straightforward manner. The aforementioned goals can be accomplished by using an Object Oriented software approach. Thus, the goal of the presented research was to incorporate a specific solution technique, an Integral Equation Nystrm method, into a general, Object Oriented software framework.
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Holst, Wade. "The tension between expressive power and method-dispatch efficiency in object-oriented languages." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0012/NQ59971.pdf.
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Guernsey, Bryan James. "A locally corrected Nyström method for surface integral equations an object oriented approach /." Lexington, Ky. : [University of Kentucky Libraries], 2007. http://lib.uky.edu/ETD/ukyelen2007t00623/BJG_Thesis.pdf.
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Thesis (M.S.)--University of Kentucky, 2007.Title from document title page (viewed on September 4, 2007). Document formatted into pages; contains: iv, 67 p., [3] : ill. (some col.). Includes abstract and vita. Includes bibliographical references (p. [68]-[69]).
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White, Joey, and Joseph Policella. "A SYSTEMATIC METHOD FOR SYNTHESIS OF OBJECT ORIENTED SOFTWARE DESIGNS FOR TELEMETRY SIMULATION." International Foundation for Telemetering, 1993. http://hdl.handle.net/10150/608827.
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International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, NevadaA tremendous amount of work has been done recently in the area of Object Oriented Design (OOD) methodology. Most often, texts and papers explaining these methodologies are centered around the explanation of some arcane graphical notation. One is led to believe that the key to understanding Object Orientedness in general will be found by understanding and applying this notation. An understanding of the essence of OOD is difficult to acquire in this manner due to the disproportionate amount of energy required to memorize the graphic symbology. The prospective designer is often left with an understanding of the symbols, but with no understanding of how to apply them to a real world large scale problem. This paper provides an explanation of the Object Oriented paradigm with an example application to telemetry measurements. Next this paper provides an explanation of the most popular graphic notation for Object Oriented Design, the Booch Notation. Finally, this paper shows an alternative graphic notation that can be effectively used in Object Oriented Design during the initial stages of design to help eliminate the learning curve associated with the more popular Object Oriented notations.
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Tsai, Bor-Yuan. "A hybrid object-oriented class testing method : based on state-based and data-flow testing." Thesis, University of Sunderland, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311294.
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Kim, Sun-Woo. "Assessing the adequacy of test data for object-oriented programs using the mutation method." Thesis, University of York, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341110.
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Dalal, Malay A. "An object-oriented simulation-based method for emulation development for testing shop control software." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-06062008-151722/.
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Naser, Taher Ahmed Jabir. "A flexible approach for mapping between object-oriented databases and XML : a two way method based on an object graph." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5505.
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One of the most popular challenges facing academia and industry is the development of effective techniques and tools for maximizing the availability of data as the most valuable source of knowledge. The internet has dominated as the core for maximizing data availability and XML (eXtensible Markup Language) has emerged and is being gradually accepted as the universal standard format for platform independent publishing and exchanging data over the Internet. On the other hand, there remain large amount of data held in structured databases and database management systems have been traditionally used for the effective storage and manipulation of large volumes of data. This raised the need for effective methodologies capable of smoothly transforming data between different formats in general and between XML and structured databases in particular. This dissertation addresses the issue by proposing a two-way mapping approach between XML and object-oriented databases. The basic steps of the proposed approach are applied in a systematic way to produce a graph from the source and then transform the graph into the destination format. In other words, the derived graph summarizes characteristics of the source whether XML (elements and attributes) or object-oriented database (classes, inheritance and nesting hierarchies). Then, the developed methodology classifies nodes and links from the graph into the basic constructs of the destination, i.e., elements and attributes for XML or classes, inheritance and nesting hierarchies for object-oriented databases. The methodology has been successfully implemented and illustrative case studies are presented in this document.
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Naser, Taher A. J. "A flexible approach for mapping between object-oriented databases and xml. A two way method based on an object graph." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5505.
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One of the most popular challenges facing academia and industry is the development
of effective techniques and tools for maximizing the availability of data as the most
valuable source of knowledge. The internet has dominated as the core for
maximizing data availability and XML (eXtensible Markup Language) has emerged
and is being gradually accepted as the universal standard format for platform
independent publishing and exchanging data over the Internet. On the other hand,
there remain large amount of data held in structured databases and database
management systems have been traditionally used for the effective storage and
manipulation of large volumes of data. This raised the need for effective
methodologies capable of smoothly transforming data between different formats in
general and between XML and structured databases in particular. This dissertation
addresses the issue by proposing a two-way mapping approach between XML and
object-oriented databases. The basic steps of the proposed approach are applied in a
systematic way to produce a graph from the source and then transform the graph into
the destination format. In other words, the derived graph summarizes characteristics
of the source whether XML (elements and attributes) or object-oriented database
(classes, inheritance and nesting hierarchies). Then, the developed methodology
classifies nodes and links from the graph into the basic constructs of the destination,
i.e., elements and attributes for XML or classes, inheritance and nesting hierarchies
for object-oriented databases. The methodology has been successfully implemented
and illustrative case studies are presented in this document.
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Thurn, Christian. "Verification and Validation of Object Oriented Software Design : Guidelines on how to Choose the Best Method." Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2590.
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The earlier in the development process a fault is found, the cheaper it is to correct the fault. Therefore are verification and validation methods important tools. The problem with this is that there are many methods to choose between. This thesis sheds light on how to choose between four common verification and validation methods. The verification and validation methods presented in this thesis are reviews, inspections and Fault Tree Analysis. Review and inspection methods are evaluated in an empirical study. The result of the study shows that there are differences in terms of defect detection. Based on this study and literature study, guidelines on how to choose the best method in a given context are given.Desto tidigare i utvecklingsprocessen som ett fel hittas, desto billigare är det att rätt till detta fel. Därför är verifierings- och valideringsmetoder viktiga verktyg. Problemet är att det finns många metoder. Den här rapporten sprider ljus över hur man ska välja mellan fyra vanliga verifierings- och valideringsmetoder. Verifierings- och valideringsmetoderna i den här rapporten är granskningar, inspektioner och "Fault Tree Analysis". Granskningar och inspektioner är utvärderade i en empiriskt studie. Resultatet av studien visar att det finns skillnader mellan metoderna när det gäller att hitta fel.
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Poeti, Leonardo. "An Object-Oriented Modelling Method for Evolving the Hybrid Vehicle Design Space in a Systems Engineering Environment." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/6861.
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A combination of environmental awareness, consumer demands and pressure from legislators
has led automotive manufacturers to seek for more environmentally friendly
alternatives while still meeting the quality, performance and price demands of their
customers. This has led to many complex powertrain designs being developed in
order to produce vehicles with reduced carbon emissions. In particular, within the
last decade most of the major automotive manufactures have either developed or announced
plans to develop one or more hybrid vehicle models. This means that to be
competitive and o er the best HEV solutions to customers, manufacturers have to
assess a multitude of complex design choices in the most e cient way possible. Even
though the automotive industry is adept at dealing with the many complexities of
modern vehicle development; the magnitude of design choices, the cross coupling of
multiple domains, the evolving technologies and the relative lack of experience with
respect to conventional vehicle development compounds the complexities within the
HEV design space.
In order to meet the needs of e cient and
exible HEV powertrain modelling within
this design space, a parallel is drawn with the development of complex software
systems. This parallel is both from a programmatic viewpoint where object-oriented
techniques can be used for physical model development with new equation oriented
modelling environments, and from a systems methodology perspective where the
development approach encourages incremental development in order to minimize
risk. This Thesis proposes a modelling method that makes use of these new tools to
apply OOM principles to the design and development of HEV powertrain models.
Furthermore, it is argued that together with an appropriate systems engineering
approach within which the model development activities will occur, the proposed
method can provide a more
exible and manageable manner of exploring the HEV
design space.The
exibility of the modelling method is shown by means of two separate case studies,
where a hierarchical library of extendable and replaceable models is developed in
order to model the di erent powertrains. Ultimately the proposed method leads to
an intuitive manner of developing a complex system model through abstraction and
incremental development of the abstracted subsystems. Having said this, the correct
management of such an e ort within the automotive industry is key for ensuring
the reusability of models through enforced procedures for structuring, maintaining,
controlling, documenting and protecting the model development. Further, in order
to integrate the new methodology into the existing systems and practices it is imperative
to develop an e cient means of sharing information between all stakeholders
involved. In this respect it is proposed that together with an overall systems modelling
activity for tracking stakeholder involvement and providing a central point for
sharing data, CAE methods can be employed in order to automate the integration
of data.
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Allinjawi, Arwa Abdulaziz. "A new method for identifying weaknesses in, and evaluating enhancements to, object-oriented programming teaching and learning." Thesis, University of Surrey, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.654755.
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Difficulties in learning programming especially Object-Oriented Programming (OOP) have been widespread in the Computer Science (CS) departments. Researchers have proposed different approaches to improve the teaching and learning of OOP concepts. One possible method is to engage the students with stimulating 3D visualization environments to reduce the complexity while enhancing understanding of concepts. The visualization environments may improve programmer productivity and achievement of the OOP learning outcomes. In addition, many researchers have presented various assessment methods for diagnosing learning problems to improve the teaching of programming in CS higher education. However, it is still the case that researchers' conclusions are often based on subjective assessments, because CS lacks standard assessment methods for educators to measure their students' learning outcomes. This research presents the incorporation of two assessment approaches, concept-effect propagation and the Handy Instrument for Course Level Assessment (HI -Class), to promote a modified diagnostic inference about students' persistent achievements. The resulting Achievement Degree Analysis (ADA) approach diagnoses the students' problem outcomes and demonstrates its effectiveness within the context of an OOP course by determining which particular OOP concepts were perceived as being particularly difficult to learn. Usage of the ADA method is then demonstrated using a cohort of students from the CPCS203 course at King Abdulaziz University (KAU) , Faculty of Computing and Information Technology (FCIT), female section, in Saudi Arabia. It was first used to diagnose the learning achievement of specific concepts. Secondly, it was used to statistically evaluate the effectiveness of the visualization environment, Alice, which has been hypothesized to improve novice programmers' understanding of OOP concepts. No statistically significant improvement of understanding was detected in this particular context. Reasons for the null result are discussed. The thesis concludes with a discussion of (a) further experiments that may be undertaken to explore the impact of visualization environments, and (b) work that may be undeliaken to demonstrate the general applicability of the ADA method.
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SILVA, MARCELO RODRIGUES LEAO. "APPLICATION OF THE OBJECT-ORIENTED PROGRAMMING AND DISTRIBUTED COMPUTING TO THE STRUCTURAL ANALYSIS BY THE FINITE ELEMENT METHOD." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7873@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROO objetivo deste trabalho é o de apresentar uma proposta de metodologia para a análise de estruturas pelo Método dos Elementos Finitos, utilizando-se na sua implementação as técnicas de programação orientada a objetos e computação distribuída. A utilização das técnicas de programação orientada a objetos permite a implementação de um código compacto, portável e de fácil adaptação. Para a implementação do código optou-se pela utilização da linguagem C++, que possui os recursos mais importantes da programação orientada a objetos, destacando-se a herança, o polimorfismo e a sobrecarga de operadores, e da biblioteca MPI de computação paralela. Inicialmente serão apresentados os procedimentos necessários à implementação orientada a objetos da análise de estruturas pelo método dos elementos finitos, sendo posteriormente apresentadas às alterações necessárias à inclusão das técnicas de processamento paralelo, empregando-se duas técnicas de paralelização. A grande quantidade de operações matriciais envolvidas na análise de estruturas pelo método dos elementos finitos motivou ainda o desenvolvimento de uma biblioteca de classes para a representação destas operações. Os exemplos apresentados têm a finalidade de verificar a exatidão dos resultados obtidos com o código implementado, e as vantagens de se empregar a programação orientada a objetos e a computação distribuída
This work focuses on a methodology for the analysis of structures based on the Finite Element Method (FEM) using on its implementation object-oriented programming techniques, together with parallel programming. The usage of object-oriented programming techniques allows the implementation of a compact, portable and of easily adaptable source code. The implementation was carried out using C++ language, which has the main features of the object-oriented programming, such as inheritance, polymorphism and operator overloading, and the MPI library for parallel computing. The procedures taken into account on object-oriented implementations for analysis of structures using the Finite Element Method are presented, followed by the modifications needed for including parallel computing, using two strategies. Also, the large amount of matrix operations involved on the structures analysis using Finite Element Method motivated the development of a class library which represents such operations. The examples presented have the purpose of verify the accuracy of the results obtained with the code, and the advantages of the use of object-oriented programming and parallel computing.
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Lei, Peng. "A Linear Programming Method for Synthesizing Origin-Destination (O-D) Trip Tables from Traffic Counts for Inconsistent Systems." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36860.
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Origin-Destination (O-D) trip tables represent the demand-supply information of each directed zonal-pair in a given region during a given period of time. The effort of this research is to develop a linear programming methodology for estimating O-D trip tables based on observed link volumes. In order to emphasize the nature of uncertainty in the data and in the problem, the developed model permits the user's knowledge of path travel time to vary within a band-width of values, and accordingly modifies the user-optimality principle. The data on the observed flows might also not be complete and need not be perfectly matched. In addition, a prior trip table could also be specified in order to guide the updating process via the model solution. To avoid excessive computational demands required by a total numeration of all possible paths between each O-D pair, a Column Generation Algorithm (CGA) is adopted to exploit the special structures of the model. Based on the known capacity of each link, a simple formula is suggested to calculate the cost for the links having unknown volumes. An indexed cost is introduced to avoid the consideration of unnecessary passing-through-zone paths, and an algorithm for solving the corresponding minimum-cost-path problem is developed. General principles on the design of an object-oriented code are presented, and some useful programming techniques are suggested for this special problem. Some test results on the related models are presented and compared, and different sensitivity analyses are performed based on different scenarios. Finally, several research topics are recommended for future research.Master of Science
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Egry, Eugene L. "Investigation of an information system design using a combined platform of Jackson System Development and object-oriented system development methodologies." Instructions for remote access. Click here to access this electronic resource. Access available to Kutztown University faculty, staff, and students only, 1991. http://www.kutztown.edu/library/services/remote_access.asp.
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Thesis (M.S.)--Kutztown University of Pennsylvania, 1991.Source: Masters Abstracts International, Volume: 45-06, page: 3184. Abstract precedes thesis as 3 preliminary leaves. Typescript. Includes bibliographical references (leaves 69-70).
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Sirvole, Kishore. "Transient Analysis in Pipe Networks." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/31444.
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Power failure of pumps, sudden valve actions, and the operation of automatic control systems are all capable of generating high pressure waves in domestic water supply systems. These transient conditions resulting in high pressures can cause pipe failures by damaging valves and fittings. In this study, basic equations for solving transient analysis problems are derived using method of characteristics. Two example problems are presented. One, a single pipe system which is solved by developing an excel spreadsheet. Second, a pipe network problem is solved using transient analysis program called TRANSNET.
A transient analysis program is developed in Java. This program can handle suddenly-closing valves, gradually-closing valves, pump power failures and sudden demand changes at junctions. A maximum of four pipes can be present at a junction. A pipe network problem is solved using this java program and the results were found to be similar to that obtained from TRANSNET program. The code can be further extended, for example by developing java applets and graphical user interphase to make it more user friendly.
A two dimensional (2D) numerical model is developed using MATLAB to analyze gaseous cavitation in a single pipe system. The model is based on mathematical formulations proposed by Cannizzaro and Pezzinga (2005) and Pezzinga (2003). The model considers gaseous cavitation due to both thermic exhange between gas bubbles and surrounding liquid and during the process of gas release. The results from the model show that during transients, there is significant increase in fluid temperature along with high pressures. In literature pipe failures and noise problems in premise plumbing are atributed to gaseous cavitation.
Master of Science
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Jones, David R. "A Software Reengineering Method for Evolving a Structured Legacy System to an Object-Oriented System Model Using the Unified Modeling Language." NSUWorks, 2001. http://nsuworks.nova.edu/gscis_etd/618.
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The problem investigated by the researcher in this study is the lack of advancement of software reengineering methods that involve modeling and the migration of a structured legacy system to an object-oriented system. The solution proposed in the study was implemented with the Unified Modeling Language (UML). Given the many benefits of object-oriented systems over conventional procedural systems and the rapidly escalating costs of maintenance of systems written in conventional languages, the migration of billions of lines of procedural code written into object-oriented languages is an attractive option. However, conversion of procedural systems into object-oriented systems has been an elusive goal. The purpose of the researcher in this study was to define a method from a systems perspective for the software reengineering of legacy systems into an object-oriented system using the UML as the textual and graphical depiction of the reengineered legacy system. The method consisted of the process or steps to be taken when extracting the functionality of the legacy system to its subsequent depiction using the UML. The expectations of this research included the development of an abstract methodology for software reengineering of a structured legacy system into the model of an object-oriented design using the UML from a systems perspective. The model was validated through the study of a specific example. This approach did not employ a traditional quantitative research method; demonstration of the methodology's feasibility was based on a case study that consisted of application of the methodology to a legacy system. Metrics were applied to determine the quality of the resulting reengineered object-oriented UML model. The method this researcher defined integrated the extraction of coded information with domain knowledge to achieve the UML depicted object-oriented target architecture. It was demonstrated through the reengineering of a single application in the legacy.
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Ravalli, Gilbert, and gravalli@swin edu au. "Translation of on object role model schema into the formal language Z." Swinburne University of Technology, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20060502.130326.
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In the development of information systems for business, structured approaches are widely used in practice. Structured approaches provide a prescription and guidelines for how to go about the process of developing an information system, are relatively easy to learn and provide tools which are well suited to their task. However, the products of structured approaches are sometimes seen to be vague and imprecise since requirements are written using natural language or represented in the form of models which do not have a formal foundation. This vagueness or ambiguity can be the source of problems later in development of the information system. A possible solution to this is to represent requirements using formal methods since these are seen as precise and unambiguous. However, formal methods are typically only a mathematical language for representing requirements. They are often regarded as difficult to learn and use. Even though formal methods of one sort or another have been in existence for many years they are not popular and appear unlikely to become popular in the future.
One possible approach to providing the advantages of structured approaches and formal methods is to provide translation procedures from the products of structured approaches to a formal description in a suitable formal language. The work in this thesis follows this theme and is aimed at the creation of a translation procedure from an Object Role Model (ORM) schema to a Z specification. An object role model schema is the end product of a process called the Natural Language Information Analysis Method (NIAM) which is used to produce an information model for an information system. NIAM is a method which has been used successfully in industry since the mid 1970s and continues to be used today.
This thesis provides a translation procedure from ORM to Z which is less arbitrary and more comprehensive than previous conversion procedures in the literature. It establishes a systematic method for
(i) choosing suitable types and variables for a Z specification and
(ii) predicates that express all the standard constraints available in ORM modelling.
The style of representation in Z preserves ORM�s concepts in a way that aids traceability and validation. The natural language basis of ORM, namely the use of elementary facts, is preserved. Furthermore, an ORM schema differentiates between abstract concepts and the means by which these concepts are represented symbolically and this thesis provides a representation in Z that maintains the distinction between conceptual objects and their symbolic representation. Identification schemes of entity types are also translated into the Z specification but it is left as an option in the translation procedure.
Guiding and evaluating the work conducted here are a published set of criteria for the evaluation of a conceptual schema. These have helped in making decisions regarding the translation procedure and for assessing my work and that of others.
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Yang, Bo. "Spatio-temporal Analysis of Urban Heat Island and Heat Wave Evolution using Time-series Remote Sensing Images: Method and Applications." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552398782461458.
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Neto, Dorival Piedade. "On the Generalized Finite Element Method in nonlinear solid mechanics analyses." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-20012014-094606/.
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The Generalized Finite Element Method (GFEM) is a numerical method based on the Partition of Unity (PU) concept and inspired on both the Partition of Unity Method (PUM) and the hp-Cloud method. According to the GFEM, the PU is provided by first-degree Lagragian interpolation functions, defined over a mesh of elements similar to the Finite Element Method (FEM) meshes. In fact, the GFEM can be considered an extension of the FEM to which enrichment functions can be applied in specific regions of the problem domain to improve the solution. This technique has been successfully employed to solve problems presenting discontinuities and singularities, like those that arise in Fracture Mechanics. However, most publications on the method are related to linear analyses. The present thesis is a contribution to the few studies of nonlinear analyses of Solid Mechanics by means of the GFEM. One of its main topics is the derivation of a segment-to-segment generalized contact element based on the mortar method. Material and kinematic nonlinear phenomena are also considered in the numerical models. An Object-Oriented design was developed for the implementation of a GFEM nonlinear analyses framework written in Python programming language. The results validated the formulation and demonstrate the gains and possible drawbacks observed for the GFEM nonlinear approach.O Método dos Elementos Finitos Generalizados (MEFG) é um método numérico baseado no conceito de partição da unidade (PU) e inspirado no Método da Partição da Unidade (MPU) e o método das Nuvens-hp. De acordo com o MEFG, a PU é obtida por meio de funções de interpolação Lagragianas de primeiro grau, definidas sobre uma rede de elementos similar àquela do Método dos Elementos Finitos (MEF). De fato, o MEFG pode ser considerado uma extensão do MEF para a qual se pode aplicar enriquecimentos em regiões específicas do domínio, buscando melhorias na solução. Esta técnica já foi aplicada com sucesso em problemas com descontinuidades e singularidades, como os originários da Mecânica da Fratura. Apesar disso, a maioria das publicações sobre o método está relacionada a análises lineares. A presente tese é uma contribuição aos poucos estudos relacionados a análises não-lineares de Mecânica dos Sólidos por meio do MEFG. Um de seus principais tópicos é o desenvolvimento de um elemento de contato generalizado do tipo segmento a segmento baseado no método mortar. Fenômenos não lineares devidos ao material e à cinemática também são considerados nos modelos numéricos. Um projeto de orientação a objetos para a implementação de uma plataforma de análises não-lineares foi desenvolvido, escrito em linguagem de programação Python. Os resultados validam a formulação e demonstram os ganhos e possíveis desvantagens da abordagem a problemas não lineares por meio do MEFG.
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Pagliosa, Paulo Aristarco. "Um sistema de modelagem estrutural orientado a objetos." Universidade de São Paulo, 1998. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-16032018-160352/.
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Em engenharia, modelos podem ser entendidos como representações das características principais de um objeto, criadas com o propósito ele permitir a visualização e compreensão da estrutura e do comportamento do objeto, antes de sua construção. A estrutura de um objeto de engenharia pode ser definida por um modelo geométrico que descreve, exata ou aproximadamente, suas formas e dimensões materiais. O comportamento pode ser descrito por um conjunto de equações diferenciais de um modelo matemático que nos permite prever, sob certas condições, os efeitos de ações externas sobre o objeto. A solução do modelo matemático pode ser obtida pela análise computacional numérica de um modelo mecânico do objeto, através do método dos elementos finitos e/ou método dos elementos de contorno. Nesse trabalho, apresentamos um Sistema de Modelagem Estrutural Orientado a Objetos denominado OSW - Object Structural Workbench, destinado ao desenvolvimento de programas de análise e visualização de modelos em engenharia de estruturas. Na primeira parte do texto, introduzimos os fundamentos utilizados no desenvolvimento do sistema. Na segunda parte, descrevemos como empregar as bibliotecas de classes de OSW na construção de um programa de modelagem e apresentamos a alguns resultados obtidos com o sistema.In engineering, models may be thought as representations for the main characteristics of an object. Such representations enable us to visualize and understand the object structure and behaviour before constructing the object itself. The engineering ohject structure can be defined by a qeometric model which faith ful or approximately describes the object shape and size. The object behaviour can be ruled by a differential equations set from a mathematical model, which enables us to predict the effects of external forces acting on the object. The solution for the mathematical model can be obtained by applying the method of finite elements or method of boundary elements to an object mechanical model. In the text, we present an Object Oriented Structural Modeling System called OSW - Object Structural Workbench. The system has been designed to aid the development of computer programs for analysis and visualization of structural models. The text has been designed to aid the development of computer programs for analysis and visualization of structural models. The text has been divided into two parts. At the first one, we introduce the mathematical and computational basis employed in OSW construction. At the second one, we describe how to use the OSW class libraries to develop our own structural modeling applications, and also we present some results from OSW.
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Alencar, Antonio J. S. M. de. "OOZE : an Object-Oriented Z Environment." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239339.
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Ormsby, Andrew Robert Thomas. "Improving reuse in object oriented design methods." Thesis, Aberystwyth University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295270.
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Aranda, Saldaña Edwin Antonio 1974. "Desenvolvimento de um programa orientado por objetos para analise de escoamento em condutos forçados." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258180.
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Orientador: Edevar Luvizotto JuniorDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
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Resumo: O presente trabalho apresenta as bases para a elaboração de um modelo hidráulico computacional baseado na filosofia de programação orientada por objetos (POO) para o tratamento de problemas de escoamento de fluidos em condutos forçados em regime permanente e transitório. Na modelação hidráulica foi empregado um modelo dinâmico inercial elástico com solução através do Método das Características (MOC). Os estudos de casos apresentados mostram o potencial da ferramenta proposta para a análise de escoamentos de instalações hidráulicas em condutos forçados
Abstract: The present work shows the basis for the elaboration of a computational hydraulic model based on the object oriented programming (POO) philosophy for the management of flow problems such as flow rate in pipe systems in steady and unsteady states. The hydraulic modeling is based on the inertial dynamic model with solved through the Method of Characteristics (MOC). The different cases of studies presented in this dissertation show the potential of this tool proposal for the analysis of pipe flow installations in hydraulic systems
Mestrado
Recursos Hidricos
Mestre em Engenharia Civil
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Rylo, Edimar Cesar. "Adaptatividade hp em paralelo." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258707.
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Orientador: Philippe Remy Bernard DevlooTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
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Resumo: Esse trabalho apresenta uma abordagem para a implementação de métodos auto-adaptativos hp em malhas de elementos finitos utilizando processamento paralelo para a seleção do padrão hp a ser utilizado em cada elemento da malha. Dois tópicos são destacados: análise da qualidade da aproximação e modo de melhoria do espaço de aproximação. O trabalho apresentado propõe uma estrutura para a implementação de métodos hp autoadaptativos no ambiente PZ. Essa estrutura é genérica e pode ser utilizada independentemente de: formulação fraca, tipo de elemento utilizado, método de resolução etc. A estrutura proposta define a interface requerida de um estimador de erros, bem como a interface para a seleção do padrão de refinamento. Tal interface contempla a possibilidade de análise de malhas com elementos contínuos ou descontínuos. A implementação apresentada contempla o processamento em máquinas paralelas, de modo que o tempo de obtenção de uma malha adaptada seja aceitável em aplicações práticas. O cálculo do erro bem como a definição dos padrões de refinamento pode ser feito utilizando processamento paralelo, em ambientes com memória compartilhada ou distribuída. Uma metodologia de refinamento h baseado em padrões de refinamento foi desenvolvida, implementada e validada. Essa metodologia facilita a implementação de padrões de refinamento. Em contrapartida, a geração de malhas com espaços de aproximação contínuos impõe restrições para a seleção do padrão de refinamento de um elemento. Assim, para a seleção de um padrão de refinamento de um elemento foi desenvolvida uma metodologia de análise de padrões admissíveis. A seleção do padrão de refinamento tendo por base uma análise de padrões admissíveis é um ponto que requer novas pesquisas, sendo considerado um dos desafios da auto-adaptatividade (ver Zienkiewicz [55]).
Abstract: This work presents a study of hp adaptive methods applied to finite element approximations. Two topics are emphasized: analysis of the quality of the approximation and methodology of refinement of the approximation space. The main objective of the work is to conceive a framework for developing hp-adaptive algorithms within the PZ environment. The framework is independent of the weak statement, type of element or resolution method. The framework uses separate interfaces to define the error estimation method and selection of refinement pattern. Secondly, the framework was ported to parallel processing using the object oriented framework OOPar. The intent of parallelizing the adaptive process is to reduce the time spent in error estimation and choice of the optimal refinement pattern and thus bring adaptivity to a level where it can be used as a routine analysis method. Both error estimation and choice of refinement pattern are implemented on a shared and/or distributed machine. Finally, a methodology was developed to extend the h-adaptive refinement process based on refinement patterns. Together with the implementation of refinement patterns, a procedure was developed to check on the compatibility of refinement patterns of two neighboring elements. The choice of the "best" refinement patterns is one of the main challenges of adaptive methods (Zienkiewicz [55]). The availability of different ways of refining elements increases the flexibility of the code, but also introduces the challenge of deciding which pattern is the "best" pattern. It is possible that the combination of optimized h-refinement together with choice of h and/or p refinement may lead to very efficient approximation spaces for a given problem.
Doutorado
Estruturas
Doutor em Engenharia Civil
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Caswell, Matthew J. A. "The action semantics of object-oriented languages." Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/28283.
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Action Semantics is a framework for defining the semantics of languages. It is intended to be accessible to a wider audience of Computer Scientists than traditional semantics frameworks (such as Denotational Semantics). There has been little work carried out to date on the techniques required to define object-oriented languages with Action Semantics. The work presented in this thesis examines four potential approaches to defining the Action Semantics of object-oriented languages. In order to illustrate the four approaches a simple language EIL (Example Inheritance Language) is given, and described using these four approaches. The language Smalltalk-80 has been selected for a case study of a practical application of one of the techniques described above. It is important to be able to relate Action Semantics definitions of object-oriented languages to similar definitions given in other frameworks. It is described how this can be achieved. An example is given for the Action Semantics and Denotational Semantics of Smalltalk. This thesis concludes that it is feasible to produce Action Semantics definitions of object-oriented languages.
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Farmani, Maryam. "Object-oriented expert system design TEXPERT /." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2054.
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Thesis (M.S.)--West Virginia University, 2001.Title from document title page. Document formatted into pages; contains xii, 121 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 118-121).
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Tokuda, Lance Aiji. "Evolving object-oriented designs with refactorings /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
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Fleissner, Florian. "Parallel object oriented simulation with Lagrangian particle methods." Aachen Shaker, 2009. http://d-nb.info/1000976742/04.
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Liang, Ying. "A framework for assessing object-oriented analysis methods." Thesis, Open University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295047.
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Moghim, Mohammad Reza. "Incorporating design patterns into object-oriented development methods." Thesis, University of Salford, 1999. http://usir.salford.ac.uk/26820/.
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Object-oriented methods and design patterns provide valuable design guidance for object-oriented system development. However, they are not competitors, and in fact complement each other in many ways. The research reported in this thesis studied how to apply design patterns and object-oriented methods together to guide system development. It addresses issues such as, how methods need to be changed to accommodate the application of design patterns; how design patterns need to be adapted to fit within methods; and how the heuristics of design patterns may be brought to bear on improving methods. The thesis reports the experience of accommodating six design patterns ( Adapter, Composite, Facade, Mediator, Observer and Strategy ) from the book entitled "Design Patterns Elements of Reusable Object-Oriented Software" by E.Gamma, R. Helm, R.Johnson and J.Vlissides into certain object-oriented methods namely (Responsibility-Driven Design, Object-Oriented Software Engineering and Unified Modelling Language). This experience has been used in the work to generate a general approach for accommodating design patterns into methods. It also shows how the properties of the object-oriented methods and design patterns interact.�
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Augusto, Rodrigo Alves. "Arquitetura orientada por objetos para o MEF de alta ordem com aplicações em mecânica estrutural." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263450.
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Orientador: Marco Lúcio BittencourtTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
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Resumo: Nesta tese é apresentada uma arquitetura orientada por objetos para Método dos Elementos Finitos de Alta Ordem (MEF-AO) para solucionar problemas de grandes deformações com material hiperelástico em mecânica estrutural. O programa hp2fem foi construído em linguagem de programação MatLab, sendo totalmente modular e facilmente estensível para qualquer tipo de problema. A formulação do problema de grandes deformações foi realizada com auxílio de operadores cinemáticos, de tensões e equações constitutivas. A solução do sistema de equação não-linear for feita através do Método de Newton-Raphson. Apresentam-se resultados para a simulação de problema de grandes deformações usando material neo-Hookeano compressível em problemas 2D e 3D e métodos de alta ordem. Também, problemas de contato e otimização de forma são tratados aqui. Conclui-se que a arquitetura funciona muito bem e que o uso do MEF-AO traz grandes benefícios quanto à taxa de convergência
Abstract: This thesis presents an object oriented architecture for the High-Order Finite Element Method (HO-FEM) to solve problems of large deformations in structural mechanics. The software hp2fem was implemented using the Matlab programming language and is fully modular and easily extensible to any problem. The formulation of large deformation considered the kinematic, stress-strain operators and constitutive equations. The solution of nonlinear system equations is performed by the Newton-Raphson method. Results are presented for the simulation of large deformation problem using neo-Hookean compressible material in 2D and 3D problems and the high order methods. Also, contact problems and shape optimization are performed here. It is concluded that the architecture works very well and that the use of the HO-FEM brings great benefits in terms of convergence rate
Doutorado
Mecanica dos Sólidos e Projeto Mecanico
Doutor em Engenharia Mecânica
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Kwok, Chee Khan. "Simulation of distributed object oriented servers." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FKwok%5fC.pdf.
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Guney, Murat Efe. "A Numerical Procedure For The Nonlinear Analysis Of Reinforced Concrete Frames With Infill Walls." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606318/index.pdf.
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Materially non-linear analysis of reinforced concrete frame structures with infill walls requires appropriate mathematical models to be adopted for the beams and the columns as well as the infill walls. This study presents a mathematical model for frame elements based on a 3D Hermitian beam/column finite element and an equivalent strut model for the infill walls. The spread-of-plasticity approach is employed to model the material nonlinearity of the frame elements. The cross-section of the frame element is divided into triangular sub regions to evaluate the stiffness properties and the response of the element cross-section. By the help of the triangles spread over the actual area of the section, the bi-axial bending and the axial deformations are coupled in the inelastic range. A frame super-element is also formed by combining a number of frame finite elements.
Two identical compression-only diagonal struts are used for modeling the infill. The equivalent geometric and material properties of the struts are determined from the geometry of the infill and the strength of the masonry units
A computer code is developed using the object-oriented design paradigm and the models are implemented into this code. Efficiency and the effectiveness of the models are investigated for various cases by comparing the numerical response predictions produced by the program with those obtained from experimental studies.