一种基于OOPN的可执行对象结构模型

指出了UML的多视图模型存在缺乏统一语义模型的不足，提出了一种利用面向对象Petri网(OOPN)统一描述面向对象系统结构和行为模型的解决方法，即可执行对象结构模型(EOSM)。该方法将对象结构模型表示为可执行的OOPN子网，实现了对象的多个行为间的结构化动态耦合。研究表明，EOSM模型可以实现对象的结构模型与行为模型的统一表示。     

面向对象Petri网继承性的研究

面向对象Petri网(OOPN)利用面向对象的封装性解决了Petri网不能用于大型系统建模的问题.针对大型系统建模中的面向对象Petri网建模的便捷性进行研究,将面向对象的继承性以及与之紧密联系的多态性引入到OOPN中,以其在更大程度上实现模型的复用,使大型系统建模过程更加便捷、灵活.     

一种层次化的面向对象CPN模型及其应用

文章先分别介绍了Petri网和面向对象技术,提出将高级Petri网和面向对象技术相结合构成层次化的面向对象有色Petri网（HOCPN）模型。该模型综合了面向对象技术和Petri网的优势,实现了对较为复杂网络的建模,从而可以进一步地实现对复杂网络进行验证。最后,将该建模方法在铁路车站联锁软件系统中进行实际建模应用。     

基于面向对象Petri网的知识库模型

根据Petri网能够对知识的细节进行抽象的特点及对知识库系统应用的需求，利用VC 对Petri网进行了类的封装，建立了基于面向对象Petri网的知识库模型，实现了对知识库的动态维护，并增加了单步推理和反向执行的功能，同时也改进了规则维护算法。     

一种面向对象Petri网模型的语义和行为分析

面向对象Petri网根据面向对象思想的特点,对基本Petri网进行了扩展,引入了门、位置类型函数、多态迁移、聚集迁移以及禁止弧等概念.本文介绍了一种面向对象Petri网模型（Object-Oriented Petri Net,OOPN）,给出了OOPN的基本定义和图形表示,并对OOPN进行了语义与行为分析.OOPN能够成为面向对象系统的一种形式化的建模工具.     

面向对象Petri网在柔性贴装系统仿真中的应用

Petri网十分适合分析、设计柔性制造系统。在Petri网基础上引入面向对象(OO)技术,采用面向对象Petri网(OPN),建立了一个PCB元件柔性贴装系统的完整的OPN模型。并利用对象之间的消息传递技术实现了两个共享工作区和物料区的机械手的无冲突工作,为其它复杂的多机械手柔性装配系统的建模提供了数学和图形工具。     

基于UML的CPN模型在软件测试中的应用

UML在被工业界广泛接受的同时也成为学术界遵循的一种标准建模语言。许多面向对象软件测试的研究都围绕UML模型开展。但UML模型属于半形式化模型,往往无法自动生成测试用例。将UML模型与Petri网相结合,能够弥补其数学支持的不足。文章给出了基于UML的CPN模型的测试框架和一个从UML模型构造CPN模型的算法,并根据该方法给出了自动化支持工具U2CPN的类图结构。     

一种新型的AUV系统建模方法研究

在Petri网基础上,引入面向对象技术,提出了一种面向对象Petri网（OOPN）模型,详细论述了这种面向对象Petri网的结构,形式定义,建模步骤,并针对水下无人探测器系统操作环境的特殊性,为AUV系统建立了完整的OOPN模型,真实地反映了系统的动态特性,从而为AUV系统建模和分析提供了一个更为有效的工具。     

UML-OOPN集成建模方法及其在柔性制造系统的应用

针对柔性制造系统FMS(Flexible manufacturing system)建模特点,提出了UML-OOPN集成建模方法。该方法是用UML(the Unified Modeling Language)建立柔性制造系统FMS(Flexible manufacturing system)模型,然后将该模型映射为面向对象Petri网OOPN(Object-Oriented Petri Nets)网模型,通过Petri网模型的分析和仿真,其结果可用于修正和改进模型设计。     

基于面向对象Petri网的模型驱动开发方法的研究

模型驱动开发是对象管理组织OMG(Object Management Group)所驱动的模型驱动体系架构(Model-Driven Architecture)的一部分。面向对象Petri网(OOPN)则是一种具有面向对象特征的、可形式化描述的可视化建模语言。本文提出了一种面向对象Petri网的基本定义,详细阐述了其面向对象特征以及如何将面向对象Petri网与面向对象程序设计语言Java的基本元素及元素间的关系相对应,基于这些对应关系提出一种基于面向对象Petri网的模型驱动开发方法。并简要介绍了使用该方法进行软件开发的基本步骤。     

Model interoperability via Model Driven Development

Among the factors that contribute to the inherent complexity of the software development process is the gap between the design and the formal analysis domains. Software design is often considered a human oriented task while the analysis phase draws on formal representation and mathematical foundations. An example of this dichotomy is the use of UML for the software design phase and Petri Nets for the analysis; a separation of concerns that leads to the creation of heterogeneous models. Although UML is widely accepted as a language that can be used to model the structural and behavioural aspects of a system, its lack of mathematical foundations is seen as a serious impediment to rigorous analysis. Petri Nets on the other hand have a strong mathematical basis that are well suited for formal analysis; they lack however the appeal and the ease-of-use of UML. A pressing concern for software developers is how to bridge the gap between these domains and allow for model interoperability and the integration of different toolsets across them, and thus reduce the complexity of the software development process. The aim of this paper is to present a Model Driven Development (MDD) model transformation which supports a seamless transition between UML and Petri Nets. This is achieved by model interoperability from UML Sequence Diagrams to Petri Nets and supported by tool integration. The model transformation framework allows a software system to be designed in terms of UML Sequence Diagrams and subjected to formal analysis by taking advantage of the strong mathematical framework of Petri Nets. The behaviour of a Personal Area Network will be used to illustrate the proposed approach and to highlight model interoperability and tool integration through the design, the transformation and the analysis phases.     

一种利用UML的Petri网软件实现方法

Petri网既是一种图形化建模工具，又是一种形式化数学工具。Petri网具有对并发、并行、分布、异步系统进行验证仿真的能力。但是，Petri网是用来描述和分析要开发的系统模型的工具。不是计算机的实现工具，必须要通过一定的方法才能将Petri网用软件来实现。由于UML(统一建模语言)具有友善的用户界面，易于编程实现，故提出一种利用UML作为过渡的Petri网软件实现方法。     

Petri网及其扩展研究

Petri网是一种应用非常广泛的建模工具。首先给出了基本Petri网的概念,在此基础上对多种Petri网进行了广泛的研究,包括时间因素Petri网、有色Petri网、面向对象Petri网、模糊Petri网及受控Petri网,并针对每种Petri网的特点和应用范围进行了讨论,提出了Petri网当前发展的方向和急需解决的热点问题。     

基于随机Petri网的SPN2软件建模方法研究

随机Petri网(SPN)在进行系统性能分析时,其状态空间随着系统规模的增大而呈指数性增长,造成系统建模复杂。针对该问题,结合面向对象Petri网理论(OOPN)提出一种SPN2方法,与传统SPN方法相比,SPN2方法可进行分层及面向对象网中网建模,并应用该方法仿真高速列车在移动闭塞区间条件下GSM-R铁路无线通信系统的可靠性。     

A toolset for conformance testing against UML sequence diagrams based on event-driven colored Petri nets

Novel techniques and a toolset are presented for automatically testing the conformance of software implementations against partial behavioral models constituted by a set of parameterized UML sequence diagrams, describing both external interactions with users or client applications and internal interactions between objects in the system. Test code is automatically generated from the sequence diagrams and executed on the implementation under test, and test results and coverage information are presented back visually in the model. A runtime test library handles internal interaction checking, test stubs, and user interaction testing, taking advantage of aspect-oriented programming techniques. Incremental conformance checking is achieved by first translating sequence diagrams to Extended Petri Nets that combine the characteristics of Colored Petri Nets and Event-Driven Petri Nets.     

A methodology to specify three-dimensional interaction using Petri Nets

This work presents a methodology to formally model and to build three-dimensional interaction tasks in virtual environments using three different tools: Petri Nets, the Interaction Technique Decomposition taxonomy, and Object-Oriented techniques. User operations in the virtual environment are represented as Petri Net nodes; these nodes, when linked, represent the interaction process stages. In our methodology, places represent all the states an application can reach, transitions define the conditions to start an action, and tokens embody the data manipulated by the application. As a result of this modeling process we automatically generate the core of the application's source code. We also use a Petri Net execution library to run the application code. In order to facilitate the application modeling, we have adapted Dia, a well-known graphical diagram editor, to support Petri Nets creation and code generation. The integration of these approaches results in a modular application, based on Petri Nets formalism that allows for the specification of an interaction task and for the reuse of developed blocks in new virtual environment projects.     

An object-oriented approach to formally analyze the UML 2.0 activity partitions

Nowadays, UML is the de-facto standard for object-oriented analysis and design. Unfortunately, the deficiency of its dynamic semantics limits the possibility of early specification analysis. UML 2.0 comes to precise and complete this semantics but it remains informal and still lacks tools for automatic validation. The main purpose of this study is to automate the formal validation, according a value-oriented approach, of the behavior of systems expressed in UML. The marriage of Petri nets with temporal logics seems a suitable formalism for translating and then validating UML state-based models. The contributions of the paper are threefold. We first, consider how UML 2.0 activity partitions can be transformed into Object Petri Nets to formalize the object dynamics, in an object-oriented context. Second, we develop an approach based on the object and sequence diagram information to initialize the derived Petri nets in terms of objects and events. Finally, to thoroughly verify if the UML model meets the system required properties, we suggest to use the OCL invariants exploiting their association end constructs. The verification is performed on a predicate/transition net explored by model checking. A case study is given to illustrate this methodology throughout the paper.     

基于UML与有色Petri网的RBC切换场景的建模方法研究

针对仅有一台车载电台正常的RBC(无线闭塞中心)切换场景,探讨了一种基于UML模型和有色Petri网(CPN)的系统建模方法;首先利用UML模型的顺序图及状态图描述RBC切换流程和过程中车载设备的状态转移,再从UML状态图中提取信息构造相应的有色Petri网模型,最后利用CPN Tools的状态空间工具分析模型的有界性、家态性、活性和公平性,得到的模型动态行为符合RBC切换功能的要求;论文验证了该建模方法的有效性,为完善RBC系统设计提供依据。