计算机系统导论课程改革探索(英文)

In the paper,we analyzed the teaching problems in the course of "Introduction to Computer Systems",proposed guidelines with teaching practice and implement bilingual teaching.Then we explored the reform ways in the course of "Introduction to Computer Systems",to enhance students' self-learning ability through the full use of networked multimedia tools;and also the improvement of the teaching level of teachers.     

一种跨平台的实时TCP/IP协议栈设计

为提高异构系统下网络通信的实时性,提出一种跨平台的实时TCP/IP协议栈(RTTCP/IP)实现方法。运用操作系统适配技术屏蔽底层数据处理的差异性,增强协议栈的可移植性和可扩展性;通过简化TCP/IP协议栈的结构,减少协议栈对系统资源的占用;采用内存映射技术,将内核空间地址映射到用户空间,避免用户与内核间的数据拷贝操作;引入基于时分多址的介质访问机制和数据包优先级策略,防止网络传输冲突,解决数据包优先级倒置问题。测试结果表明,RTTCP/IP实现方法能够减少系统开销和通信延迟,提高系统实时性和稳定性。