《mapinfo用户指南》刚学maoinfo的人一定用得着,讲得很细,很透,很易学-"MapInfo User"s Guide" just learning the maoinfo certainly worthwhile, speaking very carefully, very thoroughly, it is very easy to learn
介绍了一种 802.16宽带无线城域网媒体接入控制协议研究与系统实现-This paper introduces a 802.16 broadband wireless metropolitan area network media access control protocol research and system