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电力系统潮流计算体现在数学就上是多元非线性方程组的求解问题，求解的方法有很多种。牛顿—拉夫逊法是数学上解非线性方程式的有效方法，收敛性好、迭代次数少。将牛顿—拉夫逊法用于潮流计算是以导纳矩阵为基础的，由于利用了导纳矩阵的对称性、稀疏性及节点编号顺序优化等技巧，使牛顿—拉夫逊法解题规模和计算速度进一步提高，此算法至今仍是潮流计算中广泛采用的优秀算法。(Power flow calculation in power system is a problem of solving multivariate non-linear equations in mathematics. There are many methods to solve it. Newton-Raphson method is an effective method for solving nonlinear equations in mathematics. It has good convergence and fewer iterations. The application of Newton-Raphson method to power flow calculation is based on admittance matrix. Because of the use of symmetry, sparsity and optimization of node number sequence of admittance matrix, the scale and speed of Newton-Raphson method are further improved. So far, this algorithm is still an excellent one widely used in power flow calculation.)

韦根感应IC卡读写器原理图,成熟产品,已经用于销售,单片机采用STC89C58RD+,读写模块为RC5-Wiegand sensor IC card reader schematic, mature product, has been used for sales, single-chip microcomputer used STC89C58RD+, Read and write modules for RC5

说明：  图片高斯模糊工具，用于将图片制作成各种模糊玻璃效果。(Image Gauss Blurring Tool is used to produce various blurred glass effects.)

用于求解sat可满足性问题，输入一个式子，判断是否始终满足(Solving the satisfiability problem of SAT,Enter a style to judge whether it is always satisfied)

易买网项目源码完整版，项目源码 图片素材 数据库代码都有(Easy to buy net project source code complete edition)

计算器，实现了常规的所有计算功能，很好用的(Calculator, to achieve all the computing power of a conventional, well used)

This is LS PLC software and is used for programming

DPWMMIN调制，在matlab2014A验证，可以运行。(DPWMMIN modulation, has been verificated in the matlab2014A.)

画板最常用的ＰＣＢ库文件欢迎大家下载参考(The most commonly used PCB drawing board are welcome to download the reference library)

VIP教程、如果你想当一个合格的黑客、你就必须学会编译一些小小的程序、才能加入黑客团队！(VIP tutorial, if you want to be a competent hacker, you have to learn to build some small programs, hackers can join the team!)