升余弦滤波器

基于UDP的单片机远程示波器，测试平台ESP8266完美通过，最多支持1000hz刷新率(UDP-based SCM remote oscilloscope, the test platform ESP8266 passes perfectly and supports refresh rate of up to 1000 Hz)

很好的c语言习题解答-good language to answer the questions

laberinto con reconocimiento de imagenes

VC++截图程序，可以抓取当前屏幕，实现的功能类似按下键盘的“PringScreenSysRq“键的功能。不同的是，这个程序还可以在抓取框中滚动抓取来的屏幕，可将其直接保存为BMP位图文件。最终运行效果抓取屏幕截图时的效果，如演示截图所示。

牛顿－拉夫逊法潮流计算 基本步骤： 　　（1）形成节点导纳矩阵 　　（2）将各节点电压设初值U， 　　（3）将节点初值代入相关求式，求出修正方程式的常数项向量 　　（4）将节点电压初值代入求式，求出雅可比矩阵元素 　　（5）求解修正方程，求修正向量 　　（6）求取节点电压的新值 　　（7）检查是否收敛，如不收敛，则以各节点电压的新值作为初值自第3步重新开始进行狭义次迭代，否则转入下一步 　　（8）计算支路功率分布，PV节点无功功率和平衡节点柱入功率。-Newton-Raphson method flow calculation basic steps : (1) formation of nodal admittance matrix (2) to set up the initial node voltage U, (3) the initial node-generation-related demand. calculated that the constant term formula Vector (4) nodes will be incorporated into the initial voltage-seeking, calculated Jacobian matrix elements (5) solving that equation, seek to amend the vector (6) to strike a new node voltage value (7) to check whether convergence, if not restrained. concentrated in the nodes of the new voltage as the initial value since the first three steps to re-start the narrow iterations. Otherwise, turn into the next (8) Calculation branch power distribution, PV nodes reactive power and balance-node into powe

用Winamp制作的m3u播放列表转换成通用格式

说明：  建立了随机海浪的仿真模型，利用 MATLAB 软件对海浪波倾角及船舶的横摇运动进行了仿真(The simulation model of random wave is established, and the inclination of wave and rolling motion of ship are simulated by MATLAB software)

再发一些Java对象、Java类学习实例，比较零乱，没有怎么整理，都是些初级的例子，学习Java的新手或许可以参考。

说明：  使用最小二乘法进行数据平滑。matlab实现(A smooth method first mentioned by Savitzky and Golay in the paper Abraham Savitzky & Marcel J. E. Golay. Smoothing and Differentiation of Data by Simplified Least Squares Procedures. Analytical Chemistry.1964,36(8):1627-1639.)

说明：  利用C++实现与SQL server通讯，代码无误，需按照连接语句自建数据库，VS2019调试成功。(Using C + + to realize communication with SQL server, the code is correct, the database needs to be built according to the connection statement, vs2019 debugging is successful.)