介绍了液压变压器的概念、功能，以及当前研究阶段、应用状况、前景分析。可以给机械行业研究者带来一定的研究思路。
Introduces the concept of a hydraulic transformer, function, and the current research phase, application status, Prospect. Machinery industry can give researchers bring some research ideas. (2015-02-09, PPT, 1495KB, 下载1次)
WEBGIS课件，介绍WEBGIS的基本概念，开发环境，WEB服务器等~！
WEBGIS courseware WEBGIS introduce the basic concepts, development environment, WEB server, such as ~! (2009-03-18, PPT, 45KB, 下载67次)