共查询到14条相似文献,搜索用时 562 毫秒
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提出基于Petri网的形式化的工作流网模型,用Petri分析技术对工作流业务流程的动态行为进行了描述和分析,并给出了详细的建模算法。 相似文献
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为了处理混杂系统的建模问题,提出了一种称为混合状态Petri网(HSPN)的混合Petri网,给出了HSPN的定义及其变迁规则。采用一个实际化工过程为例建立了HSPN模型,该模型可以用于混合控制器的设计,仿真结果表明了其有效性。本文还简要地讨论了HSPN的一些性质。 相似文献
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在面向方面软件开发Theme方法的基础上引入用例驱动技术,其中用例技术实现软件模块化,面向方面技术封装横切关注点,从而形成一种用例驱动的面向方面软件开发(UCD/Theme)方法。通过分析面向方面模块的动态特性在编织过程中可能产生的冲突,提出了一种扩展UML的面向方面模块动态特性编织时的冲突解决方法。通过ATM案例说明了该方法的应用。 相似文献
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Translational researchers conduct research in a highly data-intensive and continuously changing environment and need to use multiple, disparate tools to achieve their goals. These researchers would greatly benefit from meta-composite software development or the ability to continuously compose and recompose tools together in response to their ever-changing needs. However, the available tools are largely disconnected, and current software approaches are inefficient and ineffective in their support for meta-composite software development. Building on the composite services development approach, the de facto standard for developing integrated software systems, we propose a concept-map and agent-based meta-composite software development approach. A crucial step in composite services development is the modeling of users’ needs as processes, which can then be specified in an executable format for system composition. We have two key innovations. First, our approach allows researchers (who understand their needs best) instead of technicians to take a leadership role in the development of process models, reducing inefficiencies and errors. A second innovation is that our approach also allows for modeling of complex user interactions as part of the process, overcoming the technical limitations of current tools. We demonstrate the feasibility of our approach using a real-world translational research use case. We also present results of usability studies evaluating our approach for future refinements. 相似文献
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基于案例推理的方法是一种基于知识获取的方法,也是一种新型的基于数据驱动的建模方法。基于案例推理的核心是案例检索。针对基于案例推理系统中案例检索工作,本文提出了一种改进的K最近邻回归建模算法。首先,基于聚类思想的最近邻回归算法可以实现对案例库的有效划分,从而提高案例检索质量;其次,针对K最近邻算法中邻居个数的选取问题,采用粒子群算法确定需要的邻居个数,取代传统的依靠经验确定邻居个数K的做法。通过对Mackey Glass混沌时间序列数据进行仿真预测,验证了该方法的可行性。 相似文献
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Luciano Baresi Fabrizio Consorti Manuele Di Paola Antonio Gargiulo Mauro Pezzè 《Journal of medical systems》1997,21(6):369-388
The quality of health care systems and processes is becoming a prominent problem and more and more efforts are devoted to define methodologies and tools to measure and assure quality of care. New methods are required to optimize health care processes to guarantee high quality standards within (limited) available resources. Resource optimizations able to preserve the quality of treatments require good models of medical processes. This paper presents LEMMA, a new notation to model medical processes. LEMMA provides physicians with intuitive graphical elements to design their models. At the same time a high level timed Petri net corresponding to the designed model is built automatically. In this way, LEMMA models are ascribed formal semantics and can be executed and analyzed automatically. The dual language approach followed in this paper allows physicians to gain all the benefits of formal methods without being proficient in them. Medical users manage simple graphical elements, while Petri nets ensure formality and validation capabilities. In this way LEMMA mixes formal and informal notations, overcoming the problems of both the approaches. The definition of the notation has been supported by the development of an environment to design LEMMA models. The environment, besides letting us experiment with the notation, has been employed to define and analyze real case studies. 相似文献