A model of a hypertorus communication grid has been constructed in the form of an infinite Petri net. A grid cell represents either a packet switching device or a bioplast cell. A parametric expression is obtained to ...A model of a hypertorus communication grid has been constructed in the form of an infinite Petri net. A grid cell represents either a packet switching device or a bioplast cell. A parametric expression is obtained to allow a finite specification of an infinite Petri net. To prove properties of an ideal communication protocol, we derive an infinite Diophantine system of equations from it, which is subsequently solved. Then we present the programs htgen and ht-mcrl2-gen, developed in the C language, which generate Petri net and process algebra models of a hypertorus with a given number of dimensions and grid size. These are the inputs for the respective modeling tools Tina and mCRL2, which provide model visualization, step simulation, state space generation and reduction, and structural analysis techniques. Benchmarks to compare the two approaches are obtained. An ad-hoc induction-like technique on invariants,obtained for a series of generated models, allows the calculation of a solution of the Diophantine system in a parametric form.It is proven that the basic solutions of the infinite system have been found and that the infinite Petri net is bounded and conservative. Some remarks regarding liveness and liveness enforcing techniques are also presented.展开更多
开发了一种基于.NET平台的故障行波定位网络软件。该软件采用浏览器/服务器(Browser/Server,B/S)模式的系统架构,与安装在各变电站的故障行波定位装置配套使用,通过通用无线分组业务(general packet radio service,GPRS)网络接收定位装...开发了一种基于.NET平台的故障行波定位网络软件。该软件采用浏览器/服务器(Browser/Server,B/S)模式的系统架构,与安装在各变电站的故障行波定位装置配套使用,通过通用无线分组业务(general packet radio service,GPRS)网络接收定位装置发送的故障行波波头信息,依据波头到达各变电站的时间差计算故障点位置。现场应用表明该软件运行稳定,为电网故障信息的发布、共享提供了方便。展开更多
文摘A model of a hypertorus communication grid has been constructed in the form of an infinite Petri net. A grid cell represents either a packet switching device or a bioplast cell. A parametric expression is obtained to allow a finite specification of an infinite Petri net. To prove properties of an ideal communication protocol, we derive an infinite Diophantine system of equations from it, which is subsequently solved. Then we present the programs htgen and ht-mcrl2-gen, developed in the C language, which generate Petri net and process algebra models of a hypertorus with a given number of dimensions and grid size. These are the inputs for the respective modeling tools Tina and mCRL2, which provide model visualization, step simulation, state space generation and reduction, and structural analysis techniques. Benchmarks to compare the two approaches are obtained. An ad-hoc induction-like technique on invariants,obtained for a series of generated models, allows the calculation of a solution of the Diophantine system in a parametric form.It is proven that the basic solutions of the infinite system have been found and that the infinite Petri net is bounded and conservative. Some remarks regarding liveness and liveness enforcing techniques are also presented.
文摘开发了一种基于.NET平台的故障行波定位网络软件。该软件采用浏览器/服务器(Browser/Server,B/S)模式的系统架构,与安装在各变电站的故障行波定位装置配套使用,通过通用无线分组业务(general packet radio service,GPRS)网络接收定位装置发送的故障行波波头信息,依据波头到达各变电站的时间差计算故障点位置。现场应用表明该软件运行稳定,为电网故障信息的发布、共享提供了方便。
