Core analysis at Paks NPP with a new generation of VERONA.docx

1、Core analysis at Paks NPP with a new generation of VERONAA new open-source software developed for numerical simulations using discrete modeling methodsOriginal Research ArticleComputer Methods in Applied Mechanics and EngineeringCORBA is widely accepted as the open international standard for modelli

2、ng and building comprehensive distributed systems. In most cases, CORBA architects have adopted relational databases for storage of persistent data. Among the issues that usually face architecture designers considering how to combine CORBA and standard relational database standards are fault toleran

3、ce, performance, and the extensibility and scalability of the systems. The research team involved with this paper found that the ODMG object database concept is useful to solve the issues encountered when integrating CORBA and relational database standards. The reference architecture, which the team

4、 devises, integrates CORBA and relational databases without compromise on the necessary transactional properties. The CORBA standard object transaction service and concurrency control service are reused. The team also develop an object relational data modelling toolLattethat supports the overall des

5、ign intention as well the development paradigms for the proposed architecture. The implementation of the system is useful to CORBA, ODMG, and relational database architects because it provides a unified modelling and programming paradigm capable of solving the problems of managing mission-critical d

6、istributed data. Thus, we present a case study of combining different international standards to build a comprehensive system.Article Outline1. Introduction 1.1. Hybrid object relational data management system development process2. Previous works 2.1. CORBA object services2.2. WOO-DB Java binding2.3

7、. Distributed object-based database architecture model2.4. CORBA/OODB integration3. System model design 3.1. Three-tier model3.2. Data model3.3. Transaction model3.4. Failure model4. System architecture design 4.1. System overview4.2. System architecture 4.2.1. Latte4.2.2. RO components 4.2.2.1. RO

8、Server4.2.2.2. RO4.2.2.3. RO Factory4.2.2.4. RO Manager4.3. Interactions of transactional programs5. Issues and constraints 5.1. Critical issues 5.1.1. RO Server recovery5.1.2. Keys5.1.3. Data modification propagation5.1.4. Multi-inheritance5.2. System constraints 5.2.1. Transactions5.2.2. Working t

9、ogether with legacy applications5.3. System performance 5.3.1. Retrieval5.3.2. Update5.3.3. Discussion on improvements6. Concluding remarkaggregating standardsReferencesCSHM: Web-based safety and health monitoring system for construction managementOriginal Research ArticleJournal of Safety ResearchT

10、he purpose of this work is to present the development of an open-source software based on a discrete description of matter applied to study the behavior of geomaterials. This software uses Object Oriented Programming techniques, and its methodology design uses three different methods, which are the

11、Discrete Element Method (DEM) F. Donz, S.A. Magnier, Formulation of a three-dimensional numerical model of brittle behavior, Geophys. J. Int. 122 (1995) 790802, F. Donz, S.A. Magnier, L. Daudeville, C. Mariotti, Numerical study of compressive behaviour of concrete at high strain rates, J. Engrg. Mec

12、h. (1999) 11541163, the Finite Element Method (FEM) J. Rousseau, E. Frangin, P. Marin, L. Daudeville, Discrete element modelling of concrete structures and coupling with a finite element model, Comput. Concrete (in print), S.P. Xiao, T. Belytschko, A bridging domain method for coupling continua with

13、 molecular dynamics, Comput. Methods Appl. Mech. Engrg. 193 (2004) 16451669 and the Lattice Geometrical Method (LGM) J. Kozicki, Application of discrete models to describe the fracture process in brittle materials, Ph.D. thesis, Gdask University of Technology, 2007, J. Kozicki, J. Tejchman, 2D latti

14、ce model for fracture in brittle materials, Arch. Hydro-Engrg. Environ. Mech. 53 (2) (2006) 7188, J. Kozicki, J. Tejchman, Effect of aggregate structure on fracture process in concrete using 2D lattice model, Arch. Mech. 59 (45) (2007) 365384, J. Kozicki, J. Tejchman, Modelling of fracture process i

15、n concrete using a novel lattice model, Granul. Matter (in print), doi: 10.1007/s10035-008-0104-4. These methods are implemented within a single object-oriented framework in C+ using OOP design patterns. The bulk of the original work consisted mainly of finding common objects which will work for the

16、se different modeling methods without changing a single line of the C+ code. With this approach it is possible to add new numerical models by only plugging-in the corresponding formulas. The advantages of the resulting YADE framework are the following: (1) generic design provides great flexibility w

17、hen adding new scientific simulation code, (2) numerous simulation methods can be coupled within the same framework like for example DEM/FEM and (3) with the open-source philosophy, the community of users collaborate and improve the software. The YADE framework is a new emerging software, which can

18、be downloaded at the webpage.Article Outline1. Introduction2. Overview of simulation methods 2.1. Discrete Element Method2.2. Lattice Geometrical Model2.3. Coupling the Discrete Element Method with the Finite Element Method3. Introducing the object oriented architecture 3.1. The UML notation3.2. Lan

19、guage choice3.3. Generic programming approach3.4. Object oriented design patterns4. Constructing the framework5. Common objects underlying scientific simulation 5.1. Data classes5.2. Engine classes5.3. Simulation overview6. Application of the YADE framework 6.1. Discrete Element Method6.2. Lattice G

20、eometrical Model6.3. Coupling the Discrete Element Method with the Finite Element Method7. ConclusionsStructured modeling group support systems: a product design theoryOriginal Research ArticleInformation & ManagementStructured modeling is critical to the design, development, and implementation of m

21、any systems including computer software, business processes, and data networks. Since the creation of structured models relies on the knowledge of many organizational stakeholders, groups often accomplish this task. Group support systems (GSS) focus on the support of group processes and would appear

22、 to be useful for structured modeling; however, GSS usually only provide textual or decision related output rather than the structured models needed for many design processes. This paper proposes a class of systems, structured modeling GSS (smGSS), which adds support for the development of structure

23、d models to standard GSS. Since past research has shown that research results may be difficult to compare across studies when the system under investigation is not well defined, this paper develops a product design theory that defines the required characteristics of and testable design propositions

24、for an smGSS as derived from existing theory and empirical investigations.Article Outline1. Introduction2. Structured modeling and collaboration3. An IS design theory approach4. A product design theory for an smGSS 4.1. Design product kernel theories 4.1.1. Group4.1.2. Task4.1.3. Context4.1.4. Techn

25、ology4.1.5. Process4.1.6. Outcomes4.2. Meta-requirements for an smGSS 4.2.1. Boundaries4.2.2. Propositions4.2.3. Meta-requirements4.3. Meta-design4.4. Testable design product hypotheses5. ConclusionReferencesVitaeIntegration of CORBA and object relational databasesOriginal Research ArticleComputer S

26、tandards & InterfacesIPODLASA software architecture for coupling temporal simulation systems, VR, and GISOriginal Research ArticleISPRS Journal of Photogrammetry and Remote SensingEnvironmental processes often vary in space and time and act over several scales. Current software applications dealing

27、with aspects of these processes emphasize properties specific to their domain and tend to neglect other issues. For example, GIS prefers a static view and generally lacks the representation of dynamics, temporal simulation systems emphasize the temporal component but ignore space to a great extent,

28、and virtual reality tends to “forget” the underlying data and models. In order to remedy this situation we present an approach that aims to bring together the three domains; temporal simulation systems, GIS, and virtual reality, and to foster the integration of particular functionalities. This paper

29、 concentrates on concepts and requirements for the development of a suitable software architecture using case studies and use cases seen from a GIS-based perspective.Article Outline1. Introduction and motivation 1.1. IPODLAScoupling TSS, GIS, and VR1.2. Objectives2. Issues of combination of GIS, VR,

30、 and TSS 2.1. GIS functionality used2.2. Integration strategy2.3. Interoperability initiatives3. Methods and materials 3.1. Unified software development process3.2. Constraints and enablers 3.2.1. Case studies and use cases3.2.2. Legacy systems3.2.3. Standards, policies, and languages4. Identifying

31、the required functionalitythe IPODLAS approach 4.1. Case studies4.2. Use cases4.3. Listing and classifying the required functionality4.4. Use case LBM expert 2 (LE2)5. Software architecture 5.1. Development of the software architecture 5.1.1. The intelligent tree5.1.2. Cross-implementation5.1.3. Soc

32、ket communication5.2. Current software architecture 5.2.1. Data exchange5.2.2. GML 3temporal aspects6. Discussion 6.1. The IPODLAS approach6.2. Software architecture6.3. Coupling TSS, GIS, and VR6.4. GML6.5. Lessons learned7. Conclusion and outlookAcknowledgementsReferencesAn algorithmic framework for convex mixed integer nonlinear programsOriginal Research A