ASK-Modulation

基于于MATLAB的π/4 - DQPSK系统仿真源程序，非常有用(Based on MATLAB-π/4- DQPSK system simulation source code, very useful)

1. 给定模拟信号：，式中，，。对进行采样，可得采样序列 选择采样频率=1 kHz，观测时间ms，观测所得序列及其幅频特性 改变采样频率=300Hz，观测此时的变化 令采样频率=200Hz，观测此时的变化 要求分析说明原理，绘出相应的序列及其它们对应的幅频特性曲线，指出的变化，说明为什么？(failed to translatefailed to translatefailed to translatefailed to translate)

控制规律的选用要根据过程特性和工艺要求来选取，决不是说PID控制规律在任何情况下都具有较好的控制性能，不分场合都采用是不明智的。如果这样做，只会给其它工作增加复杂性，并给参数整定带来困难。当采用PID控制器还达不到工艺要求，则需要考虑其它的控制方案。如串级控制、前馈控制、大滞后控制等。 (Choice of control law according to process characteristics and process requirements to select, does not mean that PID control law in any case have a better control performance, are used regardless of where it would be unwise. If you do, will only add to the complexity of other work, and to the parameter tuning difficult. When using the PID controller has not yet reached technological requirements, you need to consider other control options. Such as cascade control, feedforward control, large time delay control.)

近似熵与样本熵的计算程序，还有快速计算样本熵与近似熵的程序(Approximate entropy and sample entropy calculation procedures, as well as the rapid calculation of sample entropy and approximate entropy program)

this code is used to determine the parameters of johnson distribution for its bounded distribution .

自动控制原理，对原系统进行PID校正，观测BODE图以及时域波形的简要程序。(Automatic control theory, PID correction of the original system, a brief observation program BODE diagram and time-domain waveform.)

Power flux with Simulink

说明：  基于谱减法的语音增强在MATLAB实现源程序(speech enhancement in MATLAB source)

Image processing, labelling and creating position matrix of points of significance in a picture

说明：  MATLAB是矩阵实验室（Matrix Laboratory）的简称，是美国MathWorks公司出品的商业数学软件，用于算法开发、数据可视化、数据分析以及数值计算的高级技术计算语言和交互式环境，主要包括MATLAB和Simulink两大部分(MATLAB is Matrix lab (Matrix Laboratory) abbreviation, is the product of our company MathWorks business mathematics software for algorithm development, data visualization, data analysis and numerical calculation of the senior technical calculation language and interactive environment, mainly including MATLAB and Simulink two most )