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PLL锁相环的角度生成问题，角度的代入运算前的修正问题，总算是解决了！(PLL PLL angle generation problem, the angle of substitution before the operation to fix the problem, finally solved!)

基于sift算法的matlab运算，能过对图像进行操作(Sift matlab algorithm based on computing)

设信号 ，用 对x(t)采样得x(n)，是否会发生频谱混叠？现利用FFT分析其频谱。 1．编程绘制该信号的波形。 2．若令N=16，编程对x(n)做FFT运算，并绘制其幅频特性曲线。 3．令N=1024，编程对x(n)做FFT运算，并绘制其幅频特性曲线。 4．分析2、3的运算结果。 设计调试报告要求： 1．工作原理简述； 2．设计思路； 3．难点及解决方法； 4．设计、调试结果及分析； 5．程序文本及操作步骤。(based signal used to x (t) in the sample x (n), whether there will be a spectrum aliasing? FFT analysis is the use of their spectrum. 1. Programming mapping of the signal waveform. 2. If so N = 16, the programming of x (n) do FFT, and the mapping of its amplitude-frequency characteristic curve. 3. Order N = 1024, the programming of x (n) do FFT, and the mapping of its amplitude-frequency characteristic curve. 4. Analysis of two, three computational results. Design debugging reporting requirements : 1. Principle outlined; 2. Design; 3. Difficulties and solutions; 4. Design, debugging and analysis of results; 5. Text and operating procedures steps.)

说明：  matlab 电 子 书 -文件操作 (e-book matlab)

controllability,observability,linearization for submarine system.

二阶系统一次性完成的最小二乘法辨识程序，便于理解最小二乘辨识的原理(Completed a one-time second-order system least squares identification procedure, easy to understand the principle of least squares identification)

VEHICLE SPEED AND SPACING CONTROL VIA COORDINATED THROTTLE AND BRAKE ACTUATION

梯度下降法工具箱，包括了L_BFGS等。MATLAB版(gradient descent toolbox, including L_BFGS, MATLAB edition)

2010年最新用小波变换做CFA彩色图像插值的源程序。J. Tian, W. Yu and L. Ma, "Color filter array color reproduction using cycle-spinning," International Journal of Electronics and Communications, Vol. 64, No. 6, pp. 584-587, Jun. 2010.(New 2010 CFA to do with the wavelet transform of the source color image interpolation. J. Tian, W. Yu and L. Ma, " Color filter array color reproduction using cycle-spinning," International Journal of Electronics and Communications, Vol. 64, No. 6, pp. 584-587, Jun. 2010.)

Fast mean of rectangular subarrays (MEX)