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HHT变换的EMD方法和希尔伯特谱的一些源程序，以及一些实例数据(HHT transform the EMD method and Hilbert spectrum of some of the source, and some examples of data)

using PSO algorithm for finding optimumpoint of rastrigin function with MATLAB

用Matlab实现gauss_elimination算法。(Gauss_elimination algorithm implementation using Matlab.)

A PID Control for Improving the characteristics of a Quarter model of a car suspension

暗示大家说的教案设计的就撒娇的就撒娇大家(js)

说明：  梯度下降法是一個一階最佳化算法，通常也稱為最速下降法。 要使用梯度下降法找到一個函數的局部極小值，必須向函數上當前點對應梯度（或者是近似梯度）的反方向的規定步長距離點進行疊代搜索。如果相反地向梯度正方向疊代進行搜索，則會接近函數的局部極大值點；這個過程則被稱為梯度上升法。(The gradient descent method is a first-order optimization algorithm, also commonly referred to as the steepest descent method. To find the local minimum of a function using the gradient descent method, an iterative search must be performed to the specified step distance point in the opposite direction of the gradient (or approximate gradient) of the current point on the function. If the search is reversed in the opposite direction to the positive direction of the gradient, it will approach the local maximum point of the function; this process is called the gradient ascent method.)

IEEE802.15.4信道的Matlab仿真。主要描述其在各种信道环境，比如各种噪声和各种干扰存在的情况下，各种性能的仿真。(Matlab simulation of the IEEE802.15.4 channel. Describes the environment in a variety of channels, such as the presence of noise and all kinds of interference, the various properties of the simulation.)

瑞利和高斯信道下的BPSK误码率，含有详细解释，成功运行，学习通信仿真第一个程序。(BPSK BER under Rayleigh and Gaussian channel containing a detailed explanation of successful operation, the first communication simulation learning program.)

基于Matlab的高通滤波器的设计源码，可以通过此代码，模拟高通滤波器的设计。并附有仿真后的图像。(Matlab-based high-pass filter design source code, this code can simulate the high-pass filter design. Together with simulation, the image.)

matlab code improve signal GPS