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仿真比较4-QAM和4-FSK调制信号在RAYLEIGH衰落信道下的误符号率和误比特率性能(4-QAM and 4-FSK modulation signal simulation comparison in Rayleigh fading channel under the symbol error rate and bit error rate performance)

Matlab函数解析经典教程Analysis of the classic tutorial Matlab function(Analysis of the classic tutorial Matlab function Analysis of the classic tutorial Matlab function)

幂法是一种计算矩阵主特征值（矩阵按模最大的特征值）及对应特征向量的迭代方法，特别适用于大型稀疏矩阵。 但是，一般幂法迭代向量v的各个不等于零的分量将随k 趋向于无穷大而使计算机溢出。因此，我们必须对某通幕法进行规范。即规范化幂法 (Power Method is a calculation of the main eigenvalue matrix (matrix according to the largest eigenvalue modulus) and the corresponding eigenvector of the iterative method, especially for large sparse matrix. However, the general power-law iteration vector v is not equal to zero all the components will be as k tends to infinity overflow of the computer. Therefore, we must pass a law to regulate screen. That is, standardized Power Method)

说明：  matlab计算二阶微分方程，有详细介绍过程，适合新手上路。(Matlab calculates the second-order differential equation, has a detailed description of the process, suitable for novices on the road.)

说明：  一种锂电池的构筑模型，关于锂电池的一个基础程序(A construction model of lithium batteries, a basic procedure for lithium batteries)

对于一幅输入图像，将产生一幅输出图像，输出图像的每个像素点的灰度值由输入像素点决定，将感兴趣特征的对比度扩展使之占据可显示灰度级的更大部分。使一输入图像转换为在每一灰度级上都有相同的像素点数，均衡化会减少灰度级数。大多数自然图像由于其灰度值分布集中在较窄的范围之内，引起图像细节不够清楚。采用直方图修正后可使图像的灰度间距拉大或使灰度均匀分布，从而增大了反差，使图像细节清楚，达到增强的目的。(For an input image, will produce an output image, the output image gray value of each pixel from the input pixel decided to expand interest in the contrast of features to make it account for more gray levels can be displayed most. Make an input image is converted to grayscale in each pixel have the same points, equalization will reduce the gray series. Most natural images because of their gray value distribution concentrated in a narrow range, causing the image detail is not clear enough. Make the image histogram revised by the gray space widening or so gray uniform distribution, thereby increasing the contrast between the image details clear objective to achieve enhanced.)

目前常用的snake算法，包括gvf和vfc snake (Snake algorithm currently used, including gvf and vfc snake)

卡尔曼滤波程序，卡尔曼滤波程序，卡尔曼滤波程序，(Kalman filtering procedures, Kalman filtering procedures, Kalman filtering procedures,)

遗传算法工具箱，可以根据其中文件提示进行修改，还可以自己编写文件嵌入(Genetic algorithm toolbox, based on documents which prompted changes can also be embedded in their own documentation)

灰色预测 GM（1,1）在数据量较少的情况下进行的灰色预测 (Grey GM (1,1) in the case of small amount of data for the Grey)