二维FDTD圆柱散射问题RCS计算

How to build affective mathematical models to understand the behaviors of serial crimes is an interesting research field in public security.

均匀圆阵部分阵元失效情况下的DOA估计方法(Part of uniform circular array element failure in case of DOA Estimation)

这是一个matlab程序，可以用来执行鱼眼图像的校正，将鱼眼图像展开成我们人眼比较好看的图像，方便观察(This is a matlab procedures can be used to perform the calibration of the fisheye image Expand the fish eye image into our human eye looks image, to facilitate the observation)

matlab图形位置转换，图像识别位移等功能的实现(matlab graphical position conversion, image recognition and displacement functions to achieve)

说明：  SD code for optimization,with matlab

在计算机上产生一组实验数据，首先产生一段零均值白噪声数据u（n）,令功率为 ，让u(n)通过一个三阶FIR： 得到y(n). .y(n)上加三个实正弦信号f1’=0.1,f2’=0.25,f3’=0.26调整 和正弦信号幅度信噪比大致为10dB,50dB,50dB. (1) 令N=256,描绘xn波形； (2)得出真实功率谱密度 . (3) 利用此实验数据Pisarenko谐波分解法估计该实验数据的正弦频率及幅度。 (On the computer to generate a set of experimental data, first generate a zero mean white noise data u (n), so that power, let u (n) through a third-order FIR: get y (n).. Y (n) added three real sinusoidal signal f1 ' = 0.1, f2' = 0.25, f3 ' = 0.26 and sine signal amplitude adjustment signal to noise ratio is approximately 10dB, 50dB, 50dB. (1) that N = 256, depicted xn waveform (2) the true power spectral density obtained. (3) using this experimental data, Pisarenko harmonic decomposition method to estimate the experimental data of the sinusoidal frequency and amplitude.)

在Matlab/Simulink环境下实现永磁同步电机的矢量控制仿真。(To simulate the vector control of PMSM in the aid of Simulink)

说明：  LDPC码的matlab仿真程序，希望对大家有用，不客气，(LDPC codes matlab simulation program, in the hope that useful, at worst,)

数字语音是信号的一种，我们处理数字语音信号，也就是对一种信号的处理，那信号是什么呢？ 信号是传递信息的函数。离散时间信号——序列——可以用图形来表示。 按信号特点的不同，信号可表示成一个或几个独立变量的函数。例如，图像信号就是空间位置（二元变量）的亮度函数。一维变量可以是时间，也可以是其他参量，习惯上将其看成时间。 (Digital Voice is a signal that we deal with digital voice signal, that is, the processing of a signal, that signal what is it? Signal is a function of transmitting information. Discrete-time signal- sequence- can be used to indicate the graphics. According to the different signal characteristics, signal or can be expressed as a function of several independent variables. For example, the image signal is the spatial location (binary variables) of the brightness function. Variables can be one-dimensional time and other parameters can be, habits will be time to treat it as a.)

说明：  基于LMS算法的matlab实现，比较基本的LMS算法，可用于自适应滤波器仿真(Matlab implementation based on LMS algorithm is a basic implementation of LMS algorithm for adaptive filter simulation.)