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FIP 的 STPN 建模与分析
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作者 熊刚 孙优贤 许晓鸣 《工业仪表与自动化装置》 1998年第4期3-8,共6页
本文首先给出通信活动的建模要求,接着对PN、TPN和STPN进行分析,定性地证明了STPN适合于实时通信活动建模,然后用STPN详细地对FIP进行了建模、定性分析和定量分析。
关键词 工厂仪器协议 PETRI网 FIP stpn 建模 分析
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A Simulation Engine for Stochastic Timed Petri Nets and Application to Emergency Healthcare Systems 被引量:4
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作者 Jiani Zhou Jiacun Wang Jun Wang 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2019年第4期969-980,共12页
In many service delivery systems,the quantity of available resources is often a decisive factor of service quality.Resources can be personnel,offices,devices,supplies,and so on,depending on the nature of the services ... In many service delivery systems,the quantity of available resources is often a decisive factor of service quality.Resources can be personnel,offices,devices,supplies,and so on,depending on the nature of the services a system provides.Although service computing has been an active research topic for decades,general approaches that assess the impact of resource provisioning on service quality matrices in a rigorous way remain to be seen.Petri nets have been a popular formalism for modeling systems exhibiting behaviors of competition and concurrency for almost a half century.Stochastic timed Petri nets(STPN),an extension to regular Petri nets,are a powerful tool for system performance evaluation.However,we did not find any single existing STPN software tool that supports all timed transition firing policies and server types,not to mention resource provisioning and requirement analysis.This paper presents a generic and resource oriented STPN simulation engine that provides all critical features necessary for the analysis of service delivery system quality vs.resource provisioning.The power of the simulation system is illustrated by an application to emergency health care systems. 展开更多
关键词 EMERGENCY department healthcare resource requirements simulation sojourn time STOCHASTIC TIMED PETRI nets(stpns) WORKFLOWS
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一种协商式生成树协议
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作者 范兴刚 任敏 王万良 《浙江工业大学学报》 CAS 2007年第3期295-299,共5页
在交换式以太网中,怎样维护无环路的拓扑结构,如何最大限度地缩小网络的转发延迟,是本文的研究重点.笔者提出一种为每个虚拟局域网建造一个树结构的协商式生成树协议.在BPDU中加入标示性能的标志,交换机根据这个标志为每个VLAN生成、维... 在交换式以太网中,怎样维护无环路的拓扑结构,如何最大限度地缩小网络的转发延迟,是本文的研究重点.笔者提出一种为每个虚拟局域网建造一个树结构的协商式生成树协议.在BPDU中加入标示性能的标志,交换机根据这个标志为每个VLAN生成、维护一个稳定的树结构,使交换机端口由阻止状态到转发状态的延迟明显缩短,提高了网络的实时特性.最后运用多层交换完成虚拟局域网之间的通信.这个算法能够快速收敛,缩小交换机端口的转发延迟,提高网络的实时特性. 展开更多
关键词 交换式以太网 转发延迟 协商式生成树协议 实时性
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