高精度空间直角坐标系与大地坐标系转换公式

PCA,红楼梦作者未解之谜，虚词，高频词(machine learning ,PCA,The author of the dream of the red chamber unsolved mystery)

带缩略图选项卡jQuery焦点图是一款带左右箭头，缩略图选项卡的jQuery网站焦点(JQuery Focus Map with Thumbnail Tab is a jQuery Web Site Focus with Right and Right Arrows and Thumbnail Tab)

光通信调制，非归零ook调制，用于光信号调制(Optical modulation, modulation of non-zero ook)

说明：  用JSP+MYSQL做的简单易用的BBS系统(With JSP+ MYSQL so easy-to-use BBS system)

各向异性材料损伤准则，复合材料三维Hashin损伤准则(Anisotropic material damage criterion, the three-dimensional composite Hashin damage criterion)

/*本人先后编了两次，第二次进行了改进。改进的思想主要是注意到棋盘上每一点的下一可到达点的个数 （下称为权值）不同，对于可到达点较少（权值小）的点应该先跳上去，这样后来跳的点可跳的方向就比 较多，回溯的现象就比较少，这样就可以大幅度提高速度*/-/* I have compiled twice, the second time for improvements. Improved thinking is that every point on the chessboard of the next point can be reached by the number (hereinafter referred to as the right value), For less accessible spots (small weights) should be the first point and jumped out of the way and then jump to the point of jumping on the direction of more, Looking back on the phenomenon of relatively small, we can significantly improve the speed* /

说明：  读写音频实现。利用python代码，可以很方便的分析出音频参数。(about read sound, we can know the paragramme of sound.)

网络工程师必备的十种工具,不妨看看你还缺些什么呢(Network engineers must ten kinds of tools, might as well take a look at what you need)

matlab数字滤波器，cic，hb，fir 滤波器 欢迎参考-Matlab digital filters, cic, hb, welcomed the reference filter fir

zooming by two method in matlab