yueshuyouhuawentiyuanma

说明：  最近看到有人提问怎样用FFT实现频谱分析，我认为能够进行到频谱分析的人，对于系统研究的深度基本上已经相当不错了。本人今天做了一个例程，发给大家参考一下。 历程主要内容(signal_analyzer.rar)如下： test1.txt 第一列为时间t，0.001s为步长；第二列为系统的输入信号；第三列为系统的输出信号。 signal_analyzer.m首先将test1.txt 的数据读入workspace，然后进行FFT，分析出两信号的频率，输出对于输入的幅值衰减（db），输出对输入的相位差。(The question was asked recently to see the realization of how to use FFT spectral analysis, I think that spectral analysis can be carried out to those who study the depth of the system basically is already quite good. Today I made a routine, distributed to Members for reference. The main contents of the course (signal_analyzer.rar) are as follows: test1.txt the first time as t, 0.001s for the step the second as the system input signal the third as a system output signal. signal_analyzer.m first test1.txt data read into workspace, and then proceed to FFT, analysis of the two signal frequency, output amplitude for input attenuation (db), the output of the input phase difference.)

运用New-Rapshon方法计算线接触常温弹流润滑程序，并绘制出压力和膜厚曲线图。(use New-Rapshon calculated line contact temperature EHL procedures, and plotted pressure and thickness curves.)

学习卡尔曼滤波的经典材料，理论很详细，配有Matlab程序，很值得一看，强烈推荐。(Kalman Filtering using matlab have theory and program which is fit to the students)

huffmann coding. needs motion vectors(x,y,prob) from motion estimation. the code also contains tree implementation

air-to-ground missile model

匹配追踪和正交匹配追踪，包含收发两个客户端程序，连续相位调制信号(CPM)产生。( Matching Pursuit and orthogonal matching pursuit, Transceiver contains two client programs, Continuous phase modulation signal (CPM) to produce.)

人工势场法，matlab程序，改进版本，修改人工势场法的不足，有详细解释(Artificial potential field method, matlab program, improved version, modification of artificial potential field method deficiencies, a detailed explanation)

超混沌系统的分岔图求解，内容详细易懂，可读性好(Hyperchaotic system to solve the bifurcation diagram, detailed easy to understand and readable)

DDS用matlab实现的源程序，可以实现调频信号，和调相信号(DDS source code with matlab implementation, can achieve FM signal, and phase modulation signal)

运用Kalman滤波对飞机进行跟踪，三维机动跟踪的代码，效果还可以，建立的模型是线性的(use the method of Kalman filters to track a manuevering target,the result is good in 3-dimension axis.)