基于CPN的信息系统资源配置动态模型的建立

针对信息资源配置问题提出了一种基于有色Petri网的规范化建模方法,并对整个建模过程进行了详细的描述.提出了系统层次模型结构和执行图的概念,对执行图和Petri网之间的转换过程进行了分析、定义,从而减少了大系统建模的复杂程度和工作量.利用相关的计算机工具,可以方便地实现系统建模和对信息资源配置情况的评价、分析和调整.     

基于工作流的企业业务过程集成建模方法

工作流管理是一种对业务过程进行支持、控制、监视和优化的先进工具. 将生产制造过程 BOM和Petri 网技术应用于企业业务过程,对于相关定义、建模分析以及从BOM到Petri 网的映 射实现算法进行了说明;对基于BOM- Petri 的建模方法进行了扩展优化;最后结合算法进行了 仿真研究.     

建筑施工Petri网建模技术研究

本文基于网络计划采用赋时Perri网对施工计划建模进行了研究。Petri网能够以图形方式深刻、简洁地描述系统的动态过程,精确描述事件的顺序、并发和冲突关系,使系统形象化,有利于理解。网络计划技术已经在建筑工程实践中得到了广泛的应用,以网络计划为基础,采用Petri网对施工进度计划进行建模可以有效地降低施工建模的复杂性。本文首先讨论了网络计划和Petri网基本元素的对应关系,然后对Petri网进度计划模型的转变规则进行了研究,采用面向对象的技术分别对模型元素、元素之间的关系、模型的层次和性能评价分析的指标进行了讨论,从而确定了模型转换的机制。最后以具体工程实例说明了Petri网施工进度计划模型的生成,并对模型进行了分析,证明了采用本方法的有效性。     

基于面向对象着色Petri网的工作流的研究

工作流管理一直是企业界和学术界研究的热点,而建模是工作流管理的基础,目前许多工作流模型都存在一定的局限性.Petri网具有是分析非线性自适应系统的良好工具,拥有强大的建模分析能力和算法,与着色Petri网结合,可以找到一种面向对象的工作流过程模型建模方式.     

基于CPN 的信息系统资源配置动态模型的建立

针对信息资源配置问题提出了一种基于有色Pet ri 网的规范化建模方法, 并对整个建模 过程进行了详细的描述. 提出了系统层次模型结构和执行图的概念, 对执行图和Pet ri 网之间 的转换过程进行了分析、定义, 从而减少了大系统建模的复杂程度和工作量. 利用相关的计算 机工具, 可以方便地实现系统建模和对信息资源配置情况的评价、分析和调整     

基于BOM/Petri网的业务过程工作流模型的设计与实现

基于BOM /Petri的建模方法在生产制造领域得到了广泛的应用和发展。业务过程的管理与生产制造过程有着许多相似之处,本文将生产制造过程BOM和Petri网技术应用于工作流建模,给出了定义和分析方法,对工作流的动态建模进行了论证。最合结合实例实现了计算机的模拟仿真。     

基于扩展广义随机时间Petri网的流程银行建模及等价性能分析

对业务流程进行建模和性能分析是流程银行研究的重要课题.通过对广义随机时间Petri网进行扩展,将其用于对流程银行的业务流程建模.同时,基于活动执行时间为正态分布的假设,给出了4种流程元模式的等价性能分析方法.在此基础上,进一步把活动执行时间扩展到任意分布的情况,给出了通用的等价性能分析方法.     

工作流协同系统性能评价研究

利用广义随机Petri网系统性能分析的优势,在组织间工作流模型基础上引入时间因素,并利用Petri网对局部工作流之间不同通信关系进行描述,最终构建了时间组织间工作流模型,为工作流协同系统性能评价问题提出了解决思路.     

基于时间工作流的REA模型改进研究

起源于事项法的REA模型,全面突破了事项法的基本思想,是现代会计信息系统模式开始的标志。但其在对业务流程建模的支持,对事项信息的捕捉,对领域本体的支持等方面存在缺陷。本文借鉴了工作流管理的研究成果,工作流模型的核心是过程模型,其中,Petri网模型是一种理想的过程建模语言,适合描述异步并发现象,既有严格的形式定义,又有直观的图形表示,具有严格的数学基础和规范化的语义,与REA模型具有共通性和互补性。本文应用时间Petri网流程模型对REA模型进行改进,并给出初步实现过程,有效解决了REA模型中存在的问题,并对REA相关领域的研究方向进行展望。     

基于Petri网的微博网络信息传播模型

微博网络中的信息传播模型是分析用户行为,找出传播路径,确定领袖人物,发现舆情热点等研究的基础。虽然多种不同角度的信息传播模型已经得到广泛研究,但缺乏对信息动态传播过程的直观描述。本文基于Petri网的结构和特征,针对微博网络信息传播过程,提出了一种简单直观的描述模型,该模型首先对微博网络的信息动态传播过程中的对象进行结构化描述。本文根据微博网络的用户结构关系,并利用Petri网的相关理论,形式化解释和定义信息传播基本对象,从而更加直接描述了微博网络中的转发、评论、回复等多种用户行为。在此基础上,本文利用Petri网能够描述信息流动问题的特征,结合颜色Petri网和时延Petri网,从Petri网系统的角度表示信息动态传播路径,并研究网络的动态性质和传播条件,使得信息传播模型更加真实地模拟信息传播情况。最后本文分析信息传播算例和新浪微博真实数据实验,验证了模型的有效性和可行性,为舆情态势分析以及用户行为的研究提供帮助和支持,同时也为其它社交网络信息传播的用户行为描述提供了新的思路。     

开放经济中跨国公司的最优所得税模型

通过对不同避免双重征税方法下最优所得税模型的建立,解析了政府最优政策的收入函数,得到税收竞争均衡中的公司所得课税政策.对小型开放经济而言,在扣除法和抵免法,以及免税法与抵免法的不对称体系下,对跨国公司从源征收公司所得税都是最优选择.由此,得到不同于国际税收经典理论的结论.     

System Dynamics as a Structural Theory in Operations Management

The purpose of the paper is to demonstrate the usefulness of (1) system dynamics as a structural theory for operations management and (2) system dynamics models as content theories in operations management. The key findings are that, although feedback loops, accumulation processes, and delays exist and are widespread in operations management, often these phenomena are ignored completely or not considered appropriately. Hence, it is reasoned why system dynamics is well suited as an approach for many operations management studies, and it is shown how system dynamics theory can be used to explain, analyze, and understand such phenomena in operations management. The discussion is based on a literature review and on conceptual considerations, with examples of operations management studies based on system dynamics. Implications of using this theory include the necessary re‐framing of some operations management issues and the extension of empirical studies by dynamic modeling and simulation. The value of the paper lies in the conceptualization of the link between system dynamics and operations management, which is discussed on the level of theory.     

METHODOLOGICAL ANALYSIS THROUGH SYSTEMS SIMULATION

Simulation techniques are widely used for analyzing the policy decisions of managers. This paper presents a “higher-level” use of simulation to analyze the modeling decisions of analysts, which models are, in turn, useful for policy analysis. Methodological systems simulation (MSS) is described in terms of a systems performance prediction problem. The MSS program is outlined and the two major uses of MSS-evaluation of alternative models and simulation of the analyst–are described in terms of the results of simulation runs using the systems performance prediction context.     

基于Logistic函数的互补关系创新产品的扩散叠加模型研究

运用Logistic函数构建了创新产品扩散叠加模型及相互共生模型,以分析不完全竞争条件下互补关系创新产品的扩散问题;在此基础上,利用平衡点稳定性分析法,计算了在时间变量不断变化的情况下,创新产品扩散叠加的演化趋势和扩散叠加模型的平衡点,并对平衡点的稳定性进行了分析。     

具有多阶段任务需求的温备份系统可靠性分析

实际工程中很多系统的任务都具有多个阶段,且不同阶段的外界环境及系统需求均可能发生变化,而工作元件可在任意阶段发生失效,为系统的可靠性分析与建模带来了挑战。为增加系统的可靠性,一种常用的设计方法是配置备份元件。针对多阶段任务下基于需求的温备份系统可靠性建模问题,首先提出了一种基于多值决策图的方法,其次给出了处于不同状态的元件可靠性计算公式,最后通过算例表明该模型适用于具有多阶段任务需求的温备份系统可靠性分析。     

Agent-based modeling in managerial science: an illustrative survey and study

This article provides an overview of the current state of agent-based modeling in managerial science. In particular, the aim is to illustrate major lines of development in agent-based modeling in the field and to highlight the opportunities and limitations of this research approach. The article employs a twofold approach: First, a survey on research efforts employing agent-based simulation models related to domains of managerial science is given which have benefited considerably from this research method. Second, an illustrative study is conducted in the area of management accounting research, a domain which, so far, has rarely seen agent-based modeling efforts. In particular, we introduce an agent-based model that allows to investigate the relation between intra-firm interdependencies, performance measures used in incentive schemes, and accounting accuracy. We compare this model to a study which uses both, a principal-agent model and an empirical analysis. We find that the three approaches come to similar major findings but that they suffer from rather different limitations and also provide different perspectives on the subject. In particular, it becomes obvious that agent-based modeling allows us to capture complex organizational structures and provides insights into the processual features of the system under investigation.     

决策支持系统中的建模知识表示研究

提出一种基于知识的建模支持系统 ,该系统的知识由三部分组成 :构模规则知识、变量类型知识以及数据映射知识 .构模规则知识描述了决策者的构模过程 ;变量类型知识定义了构模规则知识中所有变量的数据类型 ;数据映射知识描述求解过程所需数据的来源 .对于决策者输入的一个实际决策问题 ,系统能够根据问题描述按照构模知识自动进行求解 ,同时对经验进行学习 ,生成经验规则     

Domino Effect Analysis Using Bayesian Networks

A new methodology is introduced based on Bayesian network both to model domino effect propagation patterns and to estimate the domino effect probability at different levels. The flexible structure and the unique modeling techniques offered by Bayesian network make it possible to analyze domino effects through a probabilistic framework, considering synergistic effects, noisy probabilities, and common cause failures. Further, the uncertainties and the complex interactions among the domino effect components are captured using Bayesian network. The probabilities of events are updated in the light of new information, and the most probable path of the domino effect is determined on the basis of the new data gathered. This study shows how probability updating helps to update the domino effect model either qualitatively or quantitatively. The methodology is applied to a hypothetical example and also to an earlier‐studied case study. These examples accentuate the effectiveness of Bayesian network in modeling domino effects in processing facility.     

ANALYZING GEOGRAPHICALLY DISCRETE WAREHOUSING NETWORKS BY COMPUTER SIMULATION*

This paper describes a comprehensive simulation modeling approach to the problem of locating warehousing facilities in a fashion that minimizes the cost associated with operating a multi-product, multi-source, multi-destination distribution system. The digital simulation model presented in the study is derived within an “industrial dynamics” framework, utilizes input from an existing management information system, and employs a number of relatively simple heuristic procedures to analyze various alternative warehousing networks. Simulation results, in terms of the distribution costs associated with various warehouse locations, are presented for cases involving the effect of provision of a 100% service level, the effect of constraining product availability and/or inventory capacities at various warehouses, and the effect of deleting various warehouses from the existing warehouse network.