Taking the grid patrol mechanism in Xiangfan City as the study object,the paper summarizes experience,finds outs problems existing in traditional public security administration mode and puts forward feasible measures to solve the problems.

The non-standardized characteristics of net convergence and its application;

Principle and Method for Changing Petri Net Model to HLA Federate;

Applications of Net and Filter and Equivalence of Filter Derived Net and Its Correspond Net;

Study on the Design and Development of A Database Dynamic Network;

I n the telerobot system via network,the network delay is random,variable and un predictable so that a large network delay and information loss of command data p ackets will make some control inputs distorted and deteriorate system performan ce.