无线计算机通信(互联网络)技术研究

本文在分析无线通信网络协议标准、通信技术和网络结构的基础上，提出了无线通信既是一种可行的有线通信的替代手段的观点，同时指出该方法也有一定的缺点。     

煤矿矿井水的处理与综合利用

分析了煤矿矿井水处理和综合应用的必要性,研究了不同类型矿井水的处理方法,并在此基础上探究了煤矿矿井水综合利用的方向,以期更好地提高煤矿矿井水利用效率。     

Research on performance of ethernet interface in network centric warfare

The concept of network centric warfare (NCW) and its character, high requirement of real-time synchronization are introduced. The distributed equal-node network architecture in NCW is presented. Based on theoretical analysis on ethernet interface performance, this paper presents that forwarding latency between ethernet interface devices is a key influence factor of real-time synchronization in NCW. Ethernet fundamental is briefly introduced. The model between a switch under test (SUT) and a smartbits card is presented and used for two interconnecting switches in NCW. On condition that ignoring the latency of connecting fiber or twisted pairs and processing latency of the smartbits test system, this paper presents that clock frequency tolerance (CFT) between a SUT and a smartbits card is a leading influence factor of forwarding latency of an ethernet switch. The formulae to calculate internal forwarding latency and forwarding latency caused by its CFT are deduced. Theoretical calculation on forwarding latency of an ethernet switch based on the given CFT and test time is implemented. Experimental study on primary forwarding latency and secondary forwarding latency is implemented and forwarding latency between the SUT and the smartbits card is measured, thus testifying the accuracy of the above theoretical analysis that the CFT is a key influence factor of forwarding latency. The measures to satisfy the needs of forwarding latency in NCW are presented.     

一种异步通用高可靠通讯规约的实现

本文介绍了一种异步通用高可靠易扩展的计算机间的通讯规约及实现方法。该规约类似于计算机局部网络的基本链路控制规程(BMLC)。具有通用性强,便于移植,可靠性高,差错纠正功能,易于扩展等特点。本文重点介绍通讯数据报文的组织形式、呼叫应答匹配方法及软件实现方法。该通讯软件应用于川东电力调度系统(DDJ-17)中图形控制器(主机采用80286,简称GC)与Micro VAX-Ⅱ超小型机(简VAX-Ⅱ)间的串行通讯,实现了电网调度中实时数据的传输,电网事故快速告示及操作员命令下发、传递等系统功能要求。