面向地震网络计算的网格工作流管理系统

针对国家地震网络计算应用系统的需求,将工作流技术引入地震网络计算,实现了国家地震网格工作流管理系统.该系统能够将地震领域的部分专业应用定义为一个工作流来为用户提供服务,对系统中的基本服务进行调度,通过网格中间件进行执行,并对任务进行监视和管理.论述了该系统的框架及相关技术,通过对现有的地震行业典型应用的流程分析,构造出一个工作流实例,简化了类似应用服务的开发过程.     

可视化网格工作流过程定义工具的设计与实现

网格服务的出现对工作流建模提出了新的要求,现有工作流模型的构建一般是通过工作流建模语言对流程进行描述来完成,鉴于这种方式较为复杂且容易出错,故根据MVC模式设计并实现了基于网格业务流程执行语言GBPEL的可视化过程定义工具GWF_PDTool,使用户可以通过简捷地拖拉流程活动图标来组建网格工作流程,并同步生成以GBPEL描述的流程文档,实时检验流程的正确性.     

气候系统模式不确定分析工作流执行平台

气候系统模式的不确定性量化分析包含复杂的工作流执行流程。对其中量化分析过程和模式后处理任务两个阶段的工作流进行了分析,设计和实现了针对该分析工作的工作流执行平台。该平台能够自动化执行典型的气候系统仿真实验与分析的工作流程,支持通过专家知识灵活配置工作流。平台中包含工作流层面的容错设计,支持通过分布式并发执行来加速工作流中的大计算量任务。同时,平台支持用户自定义插件的接入,增强了工作流系统的模块化和规范化。使用设计的平台对GAMIL2气候系统模式进行了物理过程参数不确定性的分析实验,验证了本平台的可行性和有效性。     

基于OGSA网格的分层式网格任务调度器设计

文章根据网格任务调度的需求、网格任务调度的特点,在充分分析一般网格任务调度的过程等的基础上,另外考虑到了网格计算环境的一些特点,比如虚拟化、分层次及自治的本质特征,以及在工作流任务协同需求下网格任务的资源依赖、粗粒度、重复执行等特性的前提下,改进设计了一种网格工作流任务主从式分层调度模型,并给出了调度策略和调度算法实现。该调度器模型在实际的网格工作流任务协同系统中得到了较好的应用效果。     

网格工作流引擎的设计与实现

针对传统工作流调度策略只强调任务的执行顺序、忽略任务本身相互间的逻辑关系等不足,基于GT4网格环境,以网格服务及其间的协作关系为出发点,设计并实现了用DAG(directed acyclic graph)模型描述网格工作流,并通过网格服务流语言(gridserviceflowlanguage,GSFL)形式化解析工作流的网格工作流引擎系统架构。在该架构中,设计并实现了基于Dijkstra的工作流调度算法,通过实例对该网格工作流引擎和调度算法进行了实验,实现了预期效果。     

一种单一表单工作流系统的设计和实现

工作流系统是一种异时异地CSCW系统.主要讨论了一种单一表单流程系统的设计,并用Lotus Notes具体实现.该系统实现了单一表单的岗位人组的工作流程方式;系统分派流程任务;支持用户的中断表单流程操作;并提供超时处理,对那些未在规定时间内完成的流程任务给出了处理方法.     

基于本体的柔性工作流在高校OA中的应用研究

通过分析工作流程知识概念,设计了工作流系统的本体层次结构和系统结构,并以WfMC工作流程参考模型和基于构件的开发技术为基础,将工作流程分为信息、文档、任务和流程样板四个组件,再通过这四个部分的柔性组合,形成具体的流程实例,实现了工作流柔性化设计。     

基于工作流的高性能计算用户环境的设计

面向行业的高性能计算越来越复杂,一个任务的完成不仅仅需要计算服务,还需要数据服务以及各种辅助设备服务.依靠作业管理系统构建的高性能计算用户环境仅仅支持作业间的时序依赖,没有容错机制和健全的流程控制,不能完全满足日益复杂的面向行业的高性能计算用户的需求.基于工作流构建的高性能计算用户环境,在石油物探行业得到了较好的应用.它不仅便于业务流程的创建和控制,而且扩展了各种关系依赖和流程语义,特别是具有检查点功能的基于事件模型的工作流引擎,给系统提供了可靠性保证.这使得基于工作流的高性能计算用户环境能够灵活地适应不同用户环境的变化.     

网格的虚拟组织资源管理与工作流调度模型

资源调度是网格计算的重要内容。利用虚拟组织管理领域相关的网格资源,利用工作流技术组织网格任务,可以有效的降低网格调度问题的复杂性。本文提出一种调度模型,分别在工作流引擎和虚拟组织两个层次实施调度,以协调网格用户和服务提供者的不同利益,提高网格系统的性能、服务质量和易用性。     

一种轻量级网格工作流引擎的研究与实现

如何将网格技术和现有的工作流技术相结合,通过对资源、业务的合理管理,实现虚拟组织的协同目标,近几年已成为计算机支持的协同工作领域的研究热点。本文在分析现有网格工作流系统的基础上,基于WSRF和WS-BPEL技术,提出了一种网格工作流系统的框架结构,并在该结构的基础上设计、实现了一个轻量级网格工作流引擎。     

Efficient Deviation Detection Between a Process Model and Event Logs

Business processes described by formal or semi-formal models are realized via information systems. Event logs generated from these systems are probably not consistent with the existing models due to insufficient design of the information system or the system upgrade. By comparing an existing process model with event logs, we can detect inconsistencies called deviations, verify and extend the business process model, and accordingly improve the business process. In this paper, some abnormal activities in business processes are formally defined based on Petri nets. An efficient approach to detect deviations between the process model and event logs is proposed. Then, business process models are revised when abnormal activities exist. A clinical process in a healthcare information system is used as a case study to illustrate our work. Experimental results show the effectiveness and efficiency of the proposed approach.      

An e-contracting reference architecture

Business-to-business e-contracting aims at automating the contracting process between companies. It improves the efficiency of the contracting process and enables the introduction of new business models that can be supported by companies. For the development of an e-contracting system, an architecture is required that describes the system components and the communication channels between them. This paper presents a reference architecture for the development of e-contracting systems. The architecture is designed on the basis of a requirement analysis of e-contracting systems. Established architectural principles are used in its design. The architecture can serve as a foundation in the analysis and design of concrete architectures of e-contracting systems. Furthermore, it can be used as a standardization model that facilitates system integration and communication of ideas. Its value for both software architects and business professionals makes it an important tool in the analysis and implementation of e-contracting systems.     

面向重构的企业应用系统业务模型

在分析面向重构的设计原则的基础上,提出一种基于业务规则的业务模型,并给出八类规则的表达形式。通过对业务元素的持续分解,将模型中频繁发生变化的部分分离出来并使用规则表达,提高了业务模型的动态性和灵活性。最后研究了基于该业务模型的建模过程。     

面向业务人员的动态业务过程改变方法

针对目前业务过程修改和实例迁移系统对使用者的技术背景要求较高的问题,提出了一个面向业务人员的动态业务过程改变方法,进行了一致性分析,并给出了业务过程设计器。业务过程设计器基于业务过程模型和符号2.0规范。该规范易于业务分析人员掌握及建模,并具有可执行语义。针对由于业务过程重组导致的业务过程改变的常见模式,提出了业务过程改变操作类型。业务过程设计器支持业务过程改变操作类型,将IT人员解放出来,降低了业务人员与IT人员交流的成本。     

基于SOA的银行集团“新一代”系统架构

大型商业银行集团在信息化的进程中面临内部系统众多、实现平台不统一、资源利用率低、成本高、需求响应周期长等弊端.随着我国银行业的快速发展,大型商业银行集团系统架构革新势在必行.本文重点介绍在“新一代”系统建设中采取的基于SOA的架构以及组件化设计的方法.通过7+1层、12P的整体架构设计,保证了应用组件、构件间的松耦合,实现子公司与海外一体化的企业级应用,从而整合银行集团资源、快速响应业务需求,达到提升业务可靠性、可用性的目的.与此同时,引入企业级业务模型对业务进行标准化,用结构化的模型语言描述业务能力,使用流程模型、数据模型、产品模型及用户体验模型为企业级分析及设计工作提供方法和依据.     

Resilience analysis of service-oriented collaboration process management systems

Collaborative business process management allows for the automated coordination of processes involving human and computer actors. In modern economies, it is increasingly needed for this coordination to be not only within organizations but also to cross organizational boundaries. The dependence on the performance of other organizations should, however, be limited, and the control over the own processes is required from a competitiveness perspective. The main objective of this work is to propose an evaluation model for measuring a resilience of a service-oriented architecture (SOA) collaborative process management system. In this paper, we have proposed resilience analysis perspectives of SOA collaborative process systems, i.e., overall system perspective, individual process model perspective, individual process instance perspective, service perspective, and resource perspective. A collaborative incident and maintenance notification process system is reviewed for illustrating our resilience analysis. This research contributes to extend SOA collaborative business process management systems with resilience support, not only looking at quantification and identification of resilience factors, but also considering ways of improving the resilience of SOA collaborative process systems through measures at design and runtime.     

Object-oriented design processes of electronic commerce in a multi-agent environment

Corporations are moving from traditional management into a world of agile and electronic business. Such businesses have continually sought to develop information technology (IT) systems, in order to assist in the decision-making of the business process. Due to rapid changes in the business environment this process is subject to ongoing examination. To ensure the agility of electronic commerce, business design process problems must be addressed by a team of specialists or intelligent agents, and be based on object-oriented design, characterized by computability, reusability, and exchangeability. This paper proposes a multi-agent system encompassing an object-oriented approach, to design processes for electronic commerce. This approach entails solutions to design processes, for decision-makers who are geographically separated and operate on differing computer platforms. By combining various objects, different types of design processes can be solved with the same agent-based framework, making this approach very responsive. The proposed methodology is applied to a real-world construct that involves combining objects to complete an electronic commerce model: in particular the logistics objective.     

MODELING A CONTROL SYSTEM FOR ORGANIZATIONAL PROCESSES

It is widely accepted that any well designed organizational process includes a control mechanism through which management decides which aspects of the process performance are to be measured and how these measurements are to be used to change the level of resources utilized in the process. Little is known, however, about the best ways to design such a control mechanism for typical service sector processes. The focus of this research is to study how a variety of control mechanisms performs in managing a business process. The goal is to identify control mechanisms that are effective in different types of environments. This requires modeling both levels, the business process (object level), and the control system (meta level). The fundamental question we ask here is why control systems so often founder. We address the logical aspect of modeling only, not the socio-logical aspects of model use and of implementation. The scenarios for which we try to establish optimal control systems are ones of stationary, dynamic, and turbulent demand patterns. For this purpose we have designed a generic system dynamics model of a business process. The extensive simulation experiments realized with this model corroborate some of the generally acknowledged, basic principles of control, while refuting some of the usually accepted common-sense knowledge about management and organization. The pertinent reflections also lead to some substantive conclusions concerning the design of control systems.     

遥感卫星地面站业务运行管理系统模型和流程设计方法

业务运行管理系统是遥感卫星地面系统业务运行的组织和管理中心,但是不同的遥感卫星地面系统因其业务和功能设置不同,其业务运行管理系统在设计上也千差万别。本文分析了业务运行管理系统的特点、国内各个遥感卫星地面应用系统业务运行与管理的共性与特性,设计了一种具有树状层次结构的适合多种遥感卫星地面系统业务运行管理的通用业务模型,并且引入了面向对象技术进行业务运行管理系统的流程设计。该业务模型和系统流程设计方法兼具通用性和可扩展性,既能够适应不同的遥感卫星地面应用系统的业务运行管理系统的设计与实现,又能够通过灵活配置与扩展,在设计和实现中适应业务不同的需求和业务种类的变化。