pre_fun_ctrl

生成alpha 稳定噪声的程序，该程序可以用来生成四个参数的稳定噪声(produce alpha stable noise,it has four parammeters)

MATALB 优化算法，模拟退火解决TSP问题(MATALB optimization algorithm, simulated annealing to solve the TSP problem)

用MATLAB程序打开数字地震数据记录SAC格式。(using Matlab, it can open the data of seismic wave.)

K-PNN Algorithm a type of k nearest neighbor algorithm

MATLAB对地磁的数据进行处理，以及绘画出相对应的图像(MATLAB geomagnetic data processing, as well as painting a corresponding image)

有关FM调制的实例，很有针对性，运行通过(FM modulation for instance, very targeted, run by)

MATLAB处理通过采集卡采集的信号，并在MATLAB的工作区进行计算(MATLAB through the acquisition card collection deal with the signal, and in MATLAB to calculate the working area)

S函数的使用及应用举例，可以帮助你学习s函数。(good information.)

已知一个序列x(n)=0.5cos(0.55*pi*n)+cos(0.45*pi*n),时域FFT分析其频谱。 （1）使用不同宽度的矩形窗截断该序列为M点，取M分别为：20，40，160,观察不同长度对频谱影响；（2）使用哈明窗和凯泽窗重做；（3）对三种窗的结果进行分析比较；（4）总结窗类型和长度对频谱分析的影响。 (Known a sequence x (n) = 0.5cos (0.55* pi* n)+ Cos (0.45* pi* n), time-domain FFT analysis of its spectrum. (1) use a different width of the rectangular window of the sequence for M cut-off point, take M are as follows: 20,40,160, observing the impact of different lengths of the spectrum (2) the use of Hamming window and the Kaiser window redo (3 ) on the three windows analyzed and compared the results (4) summarize the type and length of window for spectrum analysis.)

mfiles useful for finding huffman code