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implementation of notch filter

Sunspot activity is cyclical, reaching a maximum about every 11 years. Let s confirm that. Here is a plot of a quantity called the Zurich sunspot relative number, which measures both number and size of sunspots. Astronomers have tabulated this number for almost 300 years.

CREATE a buffer around a polygon in Matlab

基于扩频的数字水印技术，水印信息分布于载体作品的多个频率系数，每个频率系数上负荷的水印能量很小，平衡水印的鲁棒性和不可感知性上的矛盾。(Digital watermarking based on spread spectrum technology, the watermark is found in a number of frequency coefficient vector works, each frequency coefficient on the load of the watermark energy is small, balance the robustness and non-perception of the conflict.)

仿真12脉冲直流提调速系统之二，12脉冲整流matlab仿真(Simulation 12 pulse DC mention the speed control system, 12-pulse rectifier matlab simulation)

本文介绍了如何利用excel link实现Excel与Matlab混合编程。通过连接Excel和Matlab，用户可以在Excel工作表空间和宏编程工具中使用Matlab的数值计算，图形处理等功能，不需要脱离Excel环境。(This article describes how to use excel link Excel and Matlab achieve. By connecting Excel and Matlab, Matlab users can use the numerical calculations, graphics and other functions in an Excel worksheet and macro programming tool space, without departing from the Excel environment.)

用小数据量方法求最大lyapunov指数程序设计(With a small amount of data method, to calculate the largest index of program design lyapunov)

产生一个BA无标度网络模型，可以方便的分析(Generating a BA scale-free network model, you can easily analyze)

lerning in logic prolog

（实例171）监控上网过程,可以实现在上网过程中的控制((example 171) monitoring process online, the Internet can be achieved in the process control)