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QRcode标准，非常不错的学习和编码资源，有需要的朋友请下载。(QRcode standard)

说明：  这是一个计算镜头视场的软件，非常简单但是很实用。(This is a calculation of the lens field of view of the software, very simple but very practical.)

有关二分法、试值法、帕德逼近、高斯消去的代码，可供数值计算方法学习者参考(About dichotomy, test method, Pader approximation, Gaussian elimination of code, numerical calculation method for learner reference)

研究风电接入对电力系统影响的经典书籍,适用于相关专业人士(classical text book to learn about winder power and its affect on power system)

说明：  BP算法是为了解决多层前向神经网络的权系数优化而提出来的；所以，BP算法也通常暗示着神经网络的拓扑结构是一种无反馈的多层前向网络(BP algorithm is to solve the multi-layer feedforward neural network weights optimization and put forward Therefore, BP algorithm usually implies that the topology of neural network is a multi-layer feedback-free network)

802.11 SIMULATION REPORT AND SOURCE CODE

对想了解pc控制鼠标指针的源码的人有帮助，包括windows调用了那些函数，用了那些库文件等。(Would like to know the source pc control the mouse pointer to help people, including those functions called windows, with those library files.)

hex file for 16f509 microcontroller for dc ac inverter

svm分类器,实现线性svm分类，可以在matlab中或是vc++中编译运行，首先要进行编译(svm linear classifier)

设关系A是从集合X={1，2，….，n}到集合Y={1，2，…..，m}的二元关系，而关系B是从集合Y到集合Z={1，2，….，p}的二元关系，求A与B的合成关系C。(A relationship is established from the set X = (1,2, ...., N) to the collection Y = (1,2, ... .., m) of binary relations, the relationship B is from a collection of Y to the set Z = ( 1,2, ...., p) of the binary relation, find the relationship between A and B, synthesis of C.)