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Combining mathematical programming and SysML for component sizing as applied to hydraulic systemsShah, Aditya Arunkumar 08 April 2010 (has links)
In this research, the focus is on improving a designer's capability to determine near-optimal sizes of components for a given system architecture. Component sizing is a hard problem to solve because of the presence of competing objectives, requirements from multiple disciplines, and the need for finding a solution quickly for the architecture being considered. In current approaches, designers rely on heuristics and iterate over the multiple objectives and requirements until a satisfactory solution is found. To improve on this state of practice, this research introduces advances in the following two areas: a.) Formulating a component sizing problem in a manner that is convenient to designers and b.) Solving the component sizing problem in an efficient manner so that all of the imposed requirements are satisfied simultaneously and the solution obtained is mathematically optimal.
In particular, an acausal, algebraic, equation-based, declarative modeling approach is taken to solve component sizing problems efficiently. This is because global optimization algorithms exist for algebraic models and the computation time is considerably less as compared to the optimization of dynamic simulations. In this thesis, the mathematical programming language known as GAMS (General Algebraic Modeling System) and its associated global optimization solvers are used to solve component sizing problems efficiently.
Mathematical programming languages such as GAMS are not convenient for formulating component sizing problems and therefore the Systems Modeling Language developed by the Object Management Group (OMG SysML ) is used to formally capture and organize models related to component sizing into libraries that can be reused to compose new models quickly by connecting them together. Model-transformations are then used to generate low-level mathematical programming models in GAMS that can be solved using commercial off-the-shelf solvers such as BARON (Branch and Reduce Optimization Navigator) to determine the component sizes that satisfy the requirements and objectives imposed on the system. This framework is illustrated by applying it to an example application for sizing a hydraulic log splitter.
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CHROME: a model-driven component-based rule engineVitorino dos Santos Filho, Jairson 31 January 2009 (has links)
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Previous issue date: 2009 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Vitorino dos Santos Filho, Jairson; Pierre Louis Robin, Jacques. CHROME: a model-driven component-based rule engine. 2009. Tese (Doutorado). Programa de Pós-Graduação em Ciência da Computação, Universidade Federal de Pernambuco, Recife, 2009.
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MODELOG : model-oriented development with executable logical object generationde Souza Ramalho, Franklin January 2007 (has links)
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Previous issue date: 2007 / The Unified Modeling Language (UML) has far outgrown its initial purpose as a standard
visual notation for constructing intuitive, high-level blueprint models of object-oriented
software. A series of extension, such as OCL, XMI, ASL, MOF, UML profiles, and
different proposed formal semantics, to the language and to its application scope have fedoff
each other in synergy. While these extensions constitute a sound starting point to make
UML the pivotal element for the Model-Driven Engineering (MDE) and Semantic Web
(SW) visions, many other building blocks are still missing, including: (1) Complete formal
semantics for UML and OCL; (2) UML inference engine based on such semantics to
support model checking and intelligent agent reasoning with UML semantic web
ontologies; (3) UML model compilers to fully automate both structural and behavioral code
generation from detailed UML/OCL models.
In this thesis, we present the MODELOG framework based on a single proposal to
address these three issues: it consists of an automatic mapping from fully refined
UML/OCL models to the object-oriented logic programs in the Flora-2, an executable and
Turing-complete language with a well-defined formal semantics.
We developed the MODELOG mapping as model transformations. As source for
these transformations, we reused the UML2 and OCL2 metamodels provided by OMG and
as target we developed a Flora metamodel. As we experimented and compared two
language to implement the transformation: the dedicated transformation language ATL
based on OCL, and Flora itself viewed as a model transformation language. As validating
case study for MODELOG, we developed the Triangram robotic assembly puzzle. It is an
example of planning tasks often executed by agents and it requires a complex class
hierarchy together with complex structural and behavioral constraints. The Flora PSM of
this puzzle was entirely automatically generated from its UML/OCL model by applying the
MODELOG transformations.
The main originality of this thesis is twofold. First, it simultaneously tackles various
gaps in UML for its new extended role: formal specification language, MDE, semantic web
services and agent engineering, Second, it does so without putting forward any new
language but only by reusing a theoretically consolidated and efficiently implemented one.
In contrast, previous proposals tend be limited to one or two such applications while often
proposing new languages.
The thesis makes contributions to various fields:
For MDE, it shows the feasibility of completely automated full structural and
behavioral executable code generation from a UML/OCL PIM, on a non-trivial,
complex case study involving automated reasoning;
For agile development, it reconcile that the robustness of formal methods with
the early testing of fast prototyping, since MODELOG not only generates
executable code, but also model checking code from UML/OCL models.
For UML and OCL, it provides a fully integrated denotational formal semantics
in Transaction Frame Logic on which Flora is based;
For logic programming, it provides compositional metamodels of all the
languages integrated in the Flora platform that clarify their relations and make them
available as source or target language for a variety of MDE tasks such as model
checking and fast prototyping; it also provides a way to develop logic programs
using the consolidated full-life cycle object-oriented software engineering
processes;
For agent engineering, it shows how to get combine the complementary
strengths of the object-oriented and logic paradigms, the two mostly widely reused
in agent-oriented methods;
For the semantic web service development, its introduced a highly automated
MDE approach allowing to model them visually with UML-based industrial
strengths method and CASE tools, and automatically generate their specification in the
W3C standard SWSL, which is a XML-enabled variant of Flora
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Uma abordagem de apoio à avaliação e melhoria de processo de software baseada em metamodelagem e transformações de modelos / An approach to support assessment and improvement of software processes based on metamodeling and model transformationsFeloni, Daniel Fernando Galego 28 March 2016 (has links)
Melhoria de processo de software (SPI) é uma prática de engenharia de software motivada pela necessidade de aumentar a qualidade e a produtividade no desenvolvimento de software. Um fato amplamente reconhecido é que a qualidade do produto de software pode ser, em grande parte, determinada pela qualidade do processo utilizado para desenvolvê-lo e mantê-lo. A avaliação do processo de software ajuda as organizações de software a amadurecerem seus processos, identificando problemas críticos para estabelecer prioridades de melhoria. Essa avaliação pode ser feita por meio da comparação do estado dos processos da organização em relação a um modelo de referência que estabeleça estágios de melhoria. Uma avaliação geralmente se baseia em um modelo de processo de software que fornece um roteiro para melhorias. Este trabalho tem como objetivo estabelecer uma abordagem que: (i) define um conjunto de modelos de abstração (metamodelos) de modelos de maturidade de processo de software para apoiar uma metodologia de avaliação/melhoria de processo de software com o objetivo de certificação; e (ii) permite avaliar os processos de uma organização em comparação com um modelo de maturidade por meio de transformações desses metamodelos. A abordagem é instanciada por meio de um estudo de caso utilizando os modelos MPS.Br e CMMI para exemplificar sua aplicação. Como resultado, é apresentado um comparativo entre as limitações encontradas nas metodologias encontradas na literatura e como a abordagem sugere superá-las. / Software process improvement (SPI) is a software engineering practice motivated by the need to increase the quality and productivity in software development. A fact widely recognized is that the quality of the software product can be largely determined by the quality of the process used to develop and maintain it. The assessment of software process helps software organizations to improve themselves, identifying their critical problems to establish priorities for improvement. This assessment can take place by comparing the state of the organization on their software processes to a reference model that shows stages of improvement in scales. An assessment is usually based on a software process model that provides a roadmap for improvement. This work aims to establish an approach that: (i) defines a set of abstraction models (metamodels) of software process maturity models to support an assessment/improvement methodology aiming software process certification; and (ii) evaluates the organization processes in comparison with the maturity models through transformations of those metamodels. The approach is instantiated through a case study using the MPS.Br and CMMI models to illustrate its application. As a result, a comparison between the limitations found in the methodologies identified in the literature and how the approach suggested overcome them is presented.
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Dos requisitos ? arquitetura em linhas de produtos de software: uma estrat?gia de transforma??es entre modelosCoelho, Keivilany Janielle de Lima 06 February 2012 (has links)
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Previous issue date: 2012-02-06 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The tracking between models of the requirements and architecture activities
is a strategy that aims to prevent loss of information, reducing the gap between
these two initial activities of the software life cycle. In the context
of Software Product Lines (SPL), it is important to have this support, which allows
the correspondence between this two activities, with management of variability.
In order to address this issue, this paper presents a process of bidirectional
mapping, defining transformation rules between elements of a goaloriented
requirements model (described in PL-AOVgraph) and elements of an architectural
description (defined in PL-AspectualACME). These mapping rules are
evaluated using a case study: the GingaForAll LPS. To automate this transformation,
we developed the MaRiPLA tool (Mapping Requirements to Product
Line Architecture), through MDD techniques (Modeldriven
Development), including Atlas Transformation Language (ATL)
with specification of Ecore metamodels jointly with Xtext , a DSL definition
framework, and Acceleo, a code generation tool, in Eclipse environment. Finally,
the generated models are evaluated based on quality attributes such as variability,
derivability, reusability, correctness, traceability, completeness, evolvability and
maintainability, extracted from the CAF? Quality Model / O rastreamento entre modelos das atividades de requisitos e arquitetura ? uma estrat?gia
que busca evitar a perda de informa??es, reduzindo o gap entre essas duas atividades
iniciais do ciclo de vida do software. No contexto das Linhas de Produto de
Software (LPS), ? importante que haja um suporte a esse rastreamento, que permita
a correspond?ncia entre as duas atividades, com um gerenciamento satisfat?rio das
variabilidades. Buscando atender a essa quest?o, este trabalho apresenta um processo
de mapeamento bi-direcional, definindo regras de transforma??o entre elementos
de modelo de requisitos orientado a objetivos (descrito em PL-AOVgraph) e elementos
de descri??o arquitetural (definida em PL-AspectualACME). Essas regras de
mapeamento s?o avaliadas em um estudo de caso: a LPS Ginga ForAll. Para automatizar
essa transforma??o, implementamos a ferramenta MaRiPLA (Mapping Requirements
to Product Line Architecture), atrav?s de t?cnicas do desenvolvimento
dirigido a modelos (Model-driven Development MDD), incluindo a linguagem de
transforma??es entre modelos Atlas Transformation Language (ATL) com especifica??o
de metamodelos do tipo Ecore em conjunto com os frameworks Xtext, de
defini??o DSL, e Acceleo, de gera??o de c?digo, em ambiente Eclipse. Por fim, os
modelos gerados s?o avaliados, com base em atributos de qualidade como variabilidade,
derivabilidade, reusabilidade, corretude, rastreabilidade, completude, evolutibilidade
e manutenibilidade, extra?dos do Modelo de Qualidade CAF?
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Uma abordagem de teste estrutural de uma transformações M2T baseada em hipergrafosAbade, André da Silva 05 January 2016 (has links)
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Previous issue date: 2016-01-05 / Não recebi financiamento / Context: MDD (Model-Driven Development) is a software development paradigm in which the main artefacts are models, from which source code or other artefacts are generated. Even though MDD allows different views of how to decompose a problem and how to design a software to solve it, this paradigm introduces new challenges related to the input models, transformations and output artefacts. Problem Statement: Thus, software testing is a fundamental activity to reveal defects and improve confidence in the software products developed in this context. Several techniques and testing criteria have been proposed and investigated. Among them, functional testing has been extensively explored primarily in the M2M (Model-to-Model) transformations, while structural testing for M2T (Model-to-Text) transformations still poses challenges and lacks appropriate approaches. Objective: This work aims to to present a proposal for the structural testing of M2T transformations through the characterisation of input models as complex data, templates and output artefacts involved in this process. Method: The proposed approach was organised in five phases. Its strategy proposes that the complex data (grammars and metamodels) are represented by directed hypergraphs, allowing that a combinatorial-based traversal algorithm creates subsets of the input models that will be used as test cases for the M2T transformations. In this perspective, we carried out two exploratory studies with the specific purpose of feasibility analysis of the proposed approach.
Results and Conclusion: The evaluation of results from the exploratory studies, through the analysis of some testing coverage criteria, demonstrated the relevance and feasibility of the approach for characterizing complex data for M2T transformations testing. Moreover, structuring the testing strategy in phases enables the revision and adjustment of activities, in addition to assisting the replication of the approach within different applications that make use of the MDD paradigm. / Contexto: O MDD (Model-Driven Development ou Desenvolvimento Dirigido por Modelos) e um paradigma de desenvolvimento de software em que os principais artefatos são os modelos, a partir dos quais o código ou outros artefatos são gerados. Esse paradigma, embora possibilite diferentes visões de como decompor um problema e projetar um software para soluciona-lo, introduz novos desafios, qualificados pela complexidade dos modelos de entrada, as transformações e os artefatos de saída. Definição do Problema: Dessa forma, o teste de software e uma atividade fundamental para revelar defeitos e aumentar a confiança nos produtos de software desenvolvidos nesse contexto. Diversas técnicas e critérios de teste vem sendo propostos e investigados. Entre eles, o teste funcional tem sido bastante explorado primordialmente nas transformações M2M (Model-to-Model ou Modelo para Modelo), enquanto que o teste estrutural em transformações M2T (Model-to-Text ou Modelo para Texto) ainda possui alguns desafios e carência de novas abordagens. Objetivos: O objetivo deste trabalho e apresentar uma proposta para o teste estrutural de transformações M2T, por meio da caracterização dos dados complexos dos modelos de entrada, templates e artefatos de saída envolvidos neste processo. Metodologia: A abordagem proposta foi organizada em cinco fases e sua estratégia propõe que os dados complexos (gramáticas e metamodelos) sejam representados por meio de hipergrafos direcionados, permitindo que um algoritmo de percurso em hipergrafos, usando combinatória, crie subconjuntos dos modelos de entrada que serão utilizados como casos de teste para as transformações M2T. Nesta perspectiva, realizou-se dois estudos exploratórios com propósito específico da analise de viabilidade quanto a abordagem proposta. Resultados: A avaliação dos estudos exploratórios proporcionou, por meio da analise dos critérios de cobertura aplicados, um conjunto de dados que demonstram a relevância e viabilidade da abordagem quanto a caracterização de dados complexos para os testes em transformações M2T. A segmentação das estratégias em fases possibilita a revisão e adequação das atividades do processo, além de auxiliar na replicabilidade da abordagem em diferentes aplicações que fazem uso do paradigma MDD.
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Uma abordagem de apoio à avaliação e melhoria de processo de software baseada em metamodelagem e transformações de modelos / An approach to support assessment and improvement of software processes based on metamodeling and model transformationsDaniel Fernando Galego Feloni 28 March 2016 (has links)
Melhoria de processo de software (SPI) é uma prática de engenharia de software motivada pela necessidade de aumentar a qualidade e a produtividade no desenvolvimento de software. Um fato amplamente reconhecido é que a qualidade do produto de software pode ser, em grande parte, determinada pela qualidade do processo utilizado para desenvolvê-lo e mantê-lo. A avaliação do processo de software ajuda as organizações de software a amadurecerem seus processos, identificando problemas críticos para estabelecer prioridades de melhoria. Essa avaliação pode ser feita por meio da comparação do estado dos processos da organização em relação a um modelo de referência que estabeleça estágios de melhoria. Uma avaliação geralmente se baseia em um modelo de processo de software que fornece um roteiro para melhorias. Este trabalho tem como objetivo estabelecer uma abordagem que: (i) define um conjunto de modelos de abstração (metamodelos) de modelos de maturidade de processo de software para apoiar uma metodologia de avaliação/melhoria de processo de software com o objetivo de certificação; e (ii) permite avaliar os processos de uma organização em comparação com um modelo de maturidade por meio de transformações desses metamodelos. A abordagem é instanciada por meio de um estudo de caso utilizando os modelos MPS.Br e CMMI para exemplificar sua aplicação. Como resultado, é apresentado um comparativo entre as limitações encontradas nas metodologias encontradas na literatura e como a abordagem sugere superá-las. / Software process improvement (SPI) is a software engineering practice motivated by the need to increase the quality and productivity in software development. A fact widely recognized is that the quality of the software product can be largely determined by the quality of the process used to develop and maintain it. The assessment of software process helps software organizations to improve themselves, identifying their critical problems to establish priorities for improvement. This assessment can take place by comparing the state of the organization on their software processes to a reference model that shows stages of improvement in scales. An assessment is usually based on a software process model that provides a roadmap for improvement. This work aims to establish an approach that: (i) defines a set of abstraction models (metamodels) of software process maturity models to support an assessment/improvement methodology aiming software process certification; and (ii) evaluates the organization processes in comparison with the maturity models through transformations of those metamodels. The approach is instantiated through a case study using the MPS.Br and CMMI models to illustrate its application. As a result, a comparison between the limitations found in the methodologies identified in the literature and how the approach suggested overcome them is presented.
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Langage contrôlé pour la spécification des règles métier dans le contexte de la modélisation des systèmes d'information / Controlled natural language for business rules specification inthe context of information systems modellingFeuto Njonko, Paul Brillant 25 November 2014 (has links)
Notre thèse s’inscrit dans le cadre des langages contrôlés pour le génie logiciel. Elle a pour but de faciliter l’adoption de l’approche par règles métier (ARM) par les entreprises en créant un langage contrôlé en vue d’aider à la spécification des règles métier par les experts métier. Notre solution va permettre de réduire la distance sémantique entre les experts métier et les experts système afin de répondre non seulement au besoin d’intercompréhension entre ces derniers mais aussi pour réaliser un transfert automatique de la description des règles métier vers les systèmes d’information (SI). Ce langage contrôlé que nous avons créé permettra d’assurer en plus la consistance et la traçabilité de ces règles avec leur implantation / Our thesis focuses on controlled natural languages (CNL) for software engineering. It aims at facilitating the adoption of the business rule approach (BRA) by companies by creating a CNL in order to help business experts in the specification of their business rules. Our solution will allow reducing the semantic gap between business experts and system experts to meet not only the need for mutual understanding between them but also to achieve an automatic transfer of the description of business rules to information systems (IS). The CNL that we have created will also ensure the consistency and the traceability of these rules together with their implementation
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SYMPAD - A Class Library for Processing Parallel Algorithm SpecificationsRullmann, Markus, Schaffer, Rainer, Siegel, Sebastian, Merker, Renate 08 June 2007 (has links)
In this paper we introduce a new class library to model transformations of parallel algorithms. SYMPAD
serves as a basis to develop automated tools and methods to generate efficient implementations of such
algorithms. The paper gives an overview over the general structure, as well as features of the library. We
further describe the fundamental design process that is controlled by our developed methods.
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Прилог пројектовању, консолидацији и трансформацијама ограничења торке шеме базе података, заснован на платформски независним моделима / Prilog projektovanju, konsolidaciji i transformacijama ograničenja torke šeme baze podataka, zasnovan na platformski nezavisnim modelima / An Approach to Design, Consolidation and Transformations of Database Schema Check Constraints Based on Platform Independent ModelsObrenović Nikola 10 October 2015 (has links)
<p>Употреба платформски независног моделовања и генерисања<br />прототипова у развоју информационих система скраћује време<br />њиховог развоја и побољшава квалитет тог процеса. При томе,<br />циљ је обезбеђење могућности да развој свих аспеката<br />информационих система буде подржан оваквим приступом.<br />Ова дисертација треба да пружи одговарајући допринос у<br />остварењу наведеног циља. У дисертацији представљени су<br />алгоритми за трансформацију модела ограничења вредности у<br />извршив кôд и консолидацију подшема са јединственом<br />шемом базе података, са аспекта ограничења вредности.</p> / <p>Upotreba platformski nezavisnog modelovanja i generisanja<br />prototipova u razvoju informacionih sistema skraćuje vreme<br />njihovog razvoja i poboljšava kvalitet tog procesa. Pri tome,<br />cilj je obezbeđenje mogućnosti da razvoj svih aspekata<br />informacionih sistema bude podržan ovakvim pristupom.<br />Ova disertacija treba da pruži odgovarajući doprinos u<br />ostvarenju navedenog cilja. U disertaciji predstavljeni su<br />algoritmi za transformaciju modela ograničenja vrednosti u<br />izvršiv kôd i konsolidaciju podšema sa jedinstvenom<br />šemom baze podataka, sa aspekta ograničenja vrednosti.</p> / <p>The usage of platform-independent modelling and generation of<br />prototypes in information systems development reduces the<br />development time and improves the process quality. By that, the<br />goal is to have all elements of an information system supported by<br />this approach.<br />This dissertation should provide a contribution towards fulfilling the<br />given goal. In the dissertation, author presents algorithms for<br />check constraint model into executable code transformations and<br />algorithms for testing subschema consolidation with respect to<br />check constraints.</p>
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