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用matlab对wav文件进行频谱分析，并画出频谱图(att)

说明：  matlab的二维FDTD程序,PML边界(matlab two-dimensional FDTD program, PML boundary)

时间序列ARMA建模，适用于各种ARMA建模，非常好用的通用程序(Time series ARMA modeling, suitable for all kinds of ARMA model, general program is very nice)

Normalized Least mean square algorithm in matlab

使用PID参数模糊自整定，进行非线性系统仿真研究(Fuzzy self-tuning PID parameters of nonlinear system simulation )

m-file for recording and playing audio

用matlab编写的人脸检测的算法，包含图片库，可以直接运行，检测出人脸在图片中的位置。(Matlab prepared with face detection algorithms, including image libraries, can be run to detect the face position in the picture.)

说明：  1、主要是产生0，1，2，3，阶贝赛尔函数图形。 2、产生线性调频信号和它的的频谱图。 3、产生单个脉冲的三维模糊图以及对应的等值图。 4、它是程序3的嵌套子程序，用于产生单个脉冲。 5、用于产生高斯和瑞利分布函数。 (These programs can produce 1、Bessel graph；2、LFM signal and its amplitude spectrum；3、ambiguous graph 4、Gaussian and Rayleigh function. )

说明：  捷联惯导系统放置在室内测试台上做静态测试，测试时间4500s。 1）取前180数据做粗对准（解析对准法）； 2）取第181s~900s数据做精对准（Kalman滤波法）； 3）从第901s开始做纯惯导解算； 4）用国军标的导航系统位置精度评价方法评估系统定位精度（分别计算CEP50 和 CEP95 下的定位精度）。(The strapdown inertial navigation system was placed on the indoor test bench for static test with a test time of 4500s. 1) take the first 180 data for rough alignment (analytical alignment method); 2) accurate alignment of 181s-900s data (Kalman filtering method); 3) pure inertial navigation solution is performed from 901s; 4) the positioning accuracy of the navigation system is evaluated by the method of position accuracy evaluation of the national military standard (the positioning accuracy under CEP50 and CEP95 are calculated respectively).)

利用semi-nonlocal-mean filter 去噪(semi-nonlocal-mean filter)