Download or read book The Methodology of Flowgraph Models written by Yu Ren and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Flowgraph models are directed graph models for describing the dynamic changes in a stochastic process. They are one class of multistate models that are applied to analyse time-to-event data. The main motivation of the flowgraph models is to determine the distribution of the total waiting times until an event of interest occurs in a stochastic process that progresses through various states. This thesis applies the methodology of flowgraph models to the study of Markov and SemiMarkov processes. The underlying approach of the thesis is that the access to the moment generating function (MGF) and cumulant generating function (CGF), provided by Mason's rule enables us to use the Method of Moments (MM) which depends on moments and cumulant. We give a new derivation of the Mason's rule to compute the total waiting MGF based on the internode transition matrix of a flowgraph. Next, we demonstrate methods to determine and approximate the distribution of total waiting time based on the inversion of the MGF, including an alternative approach using the Pad ́e approximation of the MGF, which always yields a closed form density. For parameter estimation, we extend the Expectation-Maximization (EM) algorithm to estimate parameters in the mixture of negative weight exponential density. Our second contribution is to develop a bias correction method in the Method of Moments (BCMM). By investigating methods for tail area approximation, we propose a new way to estimate the total waiting time density function and survival.
Download or read book Flowgraph Models for Multistate Time to Event Data written by Aparna V. Huzurbazar and published by John Wiley & Sons. This book was released on 2004-12-03 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique introduction to the innovative methodology of statisticalflowgraphs This book offers a practical, application-based approach toflowgraph models for time-to-event data. It clearly shows how thisinnovative new methodology can be used to analyze data fromsemi-Markov processes without prior knowledge of stochasticprocesses--opening the door to interesting applications in survivalanalysis and reliability as well as stochastic processes. Unlike other books on multistate time-to-event data, this workemphasizes reliability and not just biostatistics, illustratingeach method with medical and engineering examples. It demonstrateshow flowgraphs bring together applied probability techniques andcombine them with data analysis and statistical methods to answerquestions of practical interest. Bayesian methods of data analysisare emphasized. Coverage includes: * Clear instructions on how to model multistate time-to-event datausing flowgraph models * An emphasis on computation, real data, and Bayesian methods forproblem solving * Real-world examples for analyzing data from stochasticprocesses * The use of flowgraph models to analyze complex stochasticnetworks * Exercise sets to reinforce the practical approach of thisvolume Flowgraph Models for Multistate Time-to-Event Data is an invaluableresource/reference for researchers in biostatistics/survivalanalysis, systems engineering, and in fields that use stochasticprocesses, including anthropology, biology, psychology, computerscience, and engineering.
Download or read book Flowgraphs written by Charles Stanton Lorens and published by . This book was released on 1964 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flowgraph Models for Complex Multistate System Reliabiliy written by and published by . This book was released on 2005 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter reviews flowgraph models for complex multistate systems. The focus is on modeling data from semi-Markov processes and constructing likelihoods when different portions of the system data are censored and incomplete. Semi-Markov models play an important role in the analysis of time to event data. However, in practice, data analysis for semi-Markov processes can be quite difficult and many simplifying assumptions are made. Flowgraph models are multistate models that provide a data analytic method for semi-Markov processes. Flowgraphs are useful for estimating Bayes predictive densities, predictive reliability functions, and predictive hazard functions for waiting times of interest in the presence of censored and incomplete data. This chapter reviews data analysis for flowgraph models and then presents methods for constructing likelihoods when portions of the system data are missing.
Download or read book Advanced Concepts In Nuclear Energy Risk Assessment And Management written by Tunc Aldemir and published by World Scientific. This book was released on 2018-04-25 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past 30 years, numerous concerns have been raised in the literature regarding the capability of static modeling approaches such as the event-tree (ET)/fault-tree (FT) methodology to adequately account for the impact of process/hardware/software/firmware/human interactions on nuclear power plant safety assessment, and methodologies to augment the ET/FT approach have been proposed. Often referred to as dynamic probabilistic risk/safety assessment (DPRA/DPSA) methodologies, which use a time-dependent phenomenological model of system evolution along with a model of its stochastic behavior to model for possible dependencies among failure events. The book contains a collection of papers that describe at existing plant level applicable DPRA/DPSA tools, as well as techniques that can be used to augment the ET/FT approach when needed.
Download or read book Model based Process Supervision written by Arun Kumar Samantaray and published by Springer Science & Business Media. This book was released on 2008-03-14 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides control engineers and workers in industrial and academic research establishments interested in process engineering with a means to build up a practical and functional supervisory control environment and to use sophisticated models to get the best use out of their process data. Several applications to academic and small-scale-industrial processes are discussed and the development of a supervision platform for an industrial plant is presented.
Download or read book Model driven development methodology for hybrid embedded systems based on UML with emphasis on safety related requirements written by Daw Pérez, Zamira Angélica and published by kassel university press GmbH. This book was released on 2014-01-01 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Die Entwicklung eingebetteter Systeme wird aufgrund der immer anspruchsvolleren Anwendungen sowie der Verwendung von leistungsfähigeren Hardware-Architekturen (z.B. Multicore-, Hybrid-Systeme) immer komplexer. Modellgetriebene Methoden reduzieren die Komplexität des Systems mittels angemessenen Abstraktionsniveaus. Diese Arbeit stellt die modellgetriebene Entwicklungsmethodik DMOSES (Determi-nistische Modelle für die signalverarbeitenden eingebetteten Systeme) vor. Diese Methodik strebt die Verbesserung der Entwicklung hybrider eingebetteten Systeme (z.B. CPUs und FPGAs) hinsichtlich der Komplexität mittels anpassbarer Abstraktionseben, automatischer Codegenerierung und Systemverifikation an. Systeme werden mittels UML-Verhaltensmodelle spezifiziert, deren erweiterte Semantik relevante funktionale und nicht-funktionale Aspekte hybrider eingebetteten Systemen beschreibt. Eine anpassbare Abstraktionsebene wird durch die Integration von automatischer Code-Generierung und optimierbarem Code erreicht. Außerdem werden Sicherheitsanforderungen durch die Integration von Analysetechniken (Formale Verifikation, Ausführungszeit-Analyse und Software-Verträgen) in die Entwicklungsmethodik verifiziert.
Download or read book Modern Statistical And Mathematical Methods In Reliability written by Sallie Keller-mcnulty and published by World Scientific. This book was released on 2005-10-03 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains extended versions of 28 carefully selected and reviewed papers presented at The Fourth International Conference on Mathematical Methods in Reliability in Santa Fe, New Mexico, June 21-25, 2004, the leading conference in reliability research. The meeting serves as a forum for discussing fundamental issues on mathematical methods in reliability theory and its applications.A broad overview of current research activities in reliability theory and its applications is provided with coverage on reliability modeling, network and system reliability, Bayesian methods, survival analysis, degradation and maintenance modeling, and software reliability. The contributors are all leading experts in the field and include the plenary session speakers, Tim Bedford, Thierry Duchesne, Henry Wynn, Vicki Bier, Edsel Pena, Michael Hamada, and Todd Graves.
Download or read book Model Driven Software Migration A Methodology written by Christian Wagner and published by Springer Science & Business Media. This book was released on 2014-03-10 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, reliable software systems are the basis of any business or company. The continuous further development of those systems is the central component in software evolution. It requires a huge amount of time- man power- as well as financial resources. The challenges are size, seniority and heterogeneity of those software systems. Christian Wagner addresses software evolution: the inherent problems and uncertainties in the process. He presents a model-driven method which leads to a synchronization between source code and design. As a result the model layer will be the central part in further evolution and source code becomes a by-product. For the first time a model-driven procedure for maintenance and migration of software systems is described. The procedure is composed of a model-driven reengineering and a model-driven migration phase. The application and effectiveness of the procedure are confirmed with a reference implementation applied to four exemplary systems.
Download or read book Advances on Methodological and Applied Aspects of Probability and Statistics written by N. Balakrishnan and published by CRC Press. This book was released on 2004-03-01 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is one of two volumes that sets forth invited papers presented at the International Indian Statistical Association Conference. This volume emphasizes advancements in methodology and applications of probability and statistics. The chapters, representing the ideas of vanguard researchers on the topic, present several different subspecialties, including applied probability, models and applications, estimation and testing, robust inference, regression and design and sample size methodology. The text also fully describes the applications of these new ideas to industry, ecology, biology, health, economics and management. Researchers and graduate students in mathematical analysis, as well as probability and statistics professionals in industry, will learn much from this volume.
Download or read book Formal Methods and Software Engineering written by Shaoying Liu and published by Springer Science & Business Media. This book was released on 2008-10-08 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 10th International Conference on Formal Engineering Methods, ICFEM 2008, held in Kitakyushu-City, Japan, October 2008. The 20 revised full papers together with 3 invited talks presented were carefully reviewed and selected from 62 submissions. The papers address all current issues in formal methods and their applications in software engineering. They are organized in topical sections on specification and verification; testing; verification; model checking and analysis; tools; application of formal methods; semantics.
Download or read book Formal Methods for Industrial Critical Systems written by Stefan Kowalewski and published by Springer. This book was released on 2010-09-13 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the proceedings of the 15th International Workshop on Formal Methods for Industrial Critical Systems, FMICS 2010 held in Antwerp, Belgium, in September 2010 - co-located with ASE 2010, the 25th IEEE/ACM International Conference on Automated Software Engineering, The 14 papers presented were carefully reviewed and selected from 33 submissions. The aim of the FMICS workshop series is to provide a forum for researchers who are interested in the development and application of formal methods in industry. It also strives to promote research and development for the improvement of formal methods and tools for industrial applications.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1972 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Knowledge Engineering and Computer Modelling in CAD written by Alison Smith and published by Elsevier. This book was released on 2013-10-22 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: Knowledge Engineering and Computer Modelling in CAD covers the proceedings of CAD86, The Seventh International Conference on the Computer as a Design Tool. The book presents 49 papers that are organized into 14 parts according to their respective themes. The main themes of the conference are modeling and expert systems. Materials covering database, control, and geometric modeling are also presented. The coverage of the text includes expert systems in process planning; selections and evaluation of cost-effective CAD systems; and designing complex artifacts with the assistance of a microcomputer-based system. The book will be of great use to researchers and practitioners whose work involves the utilization of CAD.
Download or read book Extending the Dynamic Flowgraph Methodology Dfm to Model Human Performance and Team Effects Nureg written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Testing Object oriented Systems written by Robert Binder and published by Addison-Wesley Professional. This book was released on 2000 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than ever, mission-critical and business-critical applications depend on object-oriented (OO) software. Testing techniques tailored to the unique challenges of OO technology are necessary to achieve high reliability and quality. "Testing Object-Oriented Systems: Models, Patterns, and Tools" is an authoritative guide to designing and automating test suites for OO applications. This comprehensive book explains why testing must be model-based and provides in-depth coverage of techniques to develop testable models from state machines, combinational logic, and the Unified Modeling Language (UML). It introduces the test design pattern and presents 37 patterns that explain how to design responsibility-based test suites, how to tailor integration and regression testing for OO code, how to test reusable components and frameworks, and how to develop highly effective test suites from use cases. Effective testing must be automated and must leverage object technology. The author describes how to design and code specification-based assertions to offset testability losses due to inheritance and polymorphism. Fifteen micro-patterns present oracle strategies--practical solutions for one of the hardest problems in test design. Seventeen design patterns explain how to automate your test suites with a coherent OO test harness framework. The author provides thorough coverage of testing issues such as: The bug hazards of OO programming and differences from testing procedural code How to design responsibility-based tests for classes, clusters, and subsystems using class invariants, interface data flow models, hierarchic state machines, class associations, and scenario analysis How to support reuse by effective testing of abstract classes, generic classes, components, and frameworks How to choose an integration strategy that supports iterative and incremental development How to achieve comprehensive system testing with testable use cases How to choose a regression test approach How to develop expected test results and evaluate the post-test state of an object How to automate testing with assertions, OO test drivers, stubs, and test frameworks Real-world experience, world-class best practices, and the latest research in object-oriented testing are included. Practical examples illustrate test design and test automation for Ada 95, C++, Eiffel, Java, Objective-C, and Smalltalk. The UML is used throughout, but the test design patterns apply to systems developed with any OO language or methodology. 0201809389B04062001
Download or read book Handbook of Research on Business Process Modeling written by Cardoso, Jorge and published by IGI Global. This book was released on 2009-04-30 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book aids managers in the transformation of organizations into world-class competitors through business process applications"--Provided by publisher.
