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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.)

MP3 电路设计，学习中的好帮手，作为电路学习的基本知识-MP3 circuit design, the study of extremely helpful in learning the circuit as a basic knowledge

Difference is very iportant 7 useful for new guy. Us e it 7 enjoy!!!!

说明：  使用单片机控制电机，在labview界面上调节相关的控制参数，在labview界面上观测各个控制的参数变量。(The single chip microcomputer is used to control the motor, the relevant control parameters are adjusted on the LabVIEW interface, and the parameter variables of each control are observed on the LabVIEW interface.)

Flash小球特效 跟随鼠标旋转，可把本效果应用于flash Loading剪辑中，鼠标移动的超快，小球旋转的越快，整体上是随着鼠标移动的，可以看作是鼠标跟随特效吧。

说明：  RTDS仿真，双馈风力发电机模型，可以用RTDS仿真软件打开(RTDS simulation, doubly fed wind turbine model, can be opened with RTDS simulation software)

matlab做的模拟ADS-B数据的解码和信号处理整体流程(Matlab to do the simulation of ADS-B data decoding and signal processing the overall process)

说明：  关于LDPC的完整的编解码程序，涉及到几种不同的方法，值得学习。(Complete procedures)

Delphi编写基于SMTP的发邮件程序，Email发送程序，填写好窗口输入框中的各个参数要求，包括SMTP服务器、发送者用户名、密码、收件人相关信息等，然后即可测试发送邮件了。可熟悉下SMTP协议下的邮件发送程序原理。

image enhancement matlab code in GUI mode