chenxu

QPSK调制解调，包括波形，误码率，并加入时延，以前做的实验，可以作为参考。(QPSK modulation and demodulation, including waveforms, error rate, and add delay, before doing the experiment, can be used as reference.)

此代码为MATLAB的实现暂停、继续、终止等功能。(This code for the realization of MATLAB pause, resume, stop and other functions.)

非线性函数拟合——利用遗传算法来优化BP神经网络，利用神经网络开发包实现图形化的神经网络模拟，使得神经网络原理更直观，可用于教学，也可用于实际神经网络训练，内附详细帮助文件。(Non-linear function fitting- using genetic algorithms to optimize the BP neural network, neural network development package to implement graphical neural network simulation, neural network theory makes more intuitive, can be used for teaching, but also can be used for the actual neural network training, in with detailed help files.)

UINavigationController Push 堆栈动画(The Stack Animation of Push when UINavigationController‘s pushed)

说明：  本教程提供了使用MATLAB的实践性指导，它基于MATLAB6.0版，内容由浅入深，特别是本书对每一条命令的使用格式都作了详细而又简单明了的说明，并配备了例题加以说明其用法，因此，对于初学者自学是很有帮助(The Guide provides practical guidance to the use of MATLAB, which is based on MATLAB6.0 edition, the content of easy-to-digest, especially the book on the use of each command formats are explained in detail and simple description and sample questions to be equipped with its usage, therefore, self-study is very helpful for beginners)

说明：  为了下载东西，随便上传了一个单级倒立摆的仿真模型，不好意思，请不要下载。(to download things, casually posted a single-stage inverted pendulum simulation model, sorry, please do not download.)

实现图像的DCT高通、低通滤波器并与傅里叶变换做比较.有图可见，经DCT低通滤波后，图像变得很模糊。因为DCT是FFT取其实部，能量减少，因此图像变得很模糊，没有经FFT滤波后的效果好。 经DCT高通滤波后的图像： 经DCT高通滤波后，图像的低频部分被滤除掉，图像变黑，只有边缘的痕迹可见。 (The DCT of image high-pass, low pass filter and compared with the Fourier transform.)

说明：  利用matlab编程求解非线性方程组,用于逆运动学求解(Programming using matlab solving nonlinear equations for the inverse kinematics)

matlab 进行相机标定的很好的代码，欢迎下载，来者不拒哈(a method to calibrate a camera ,which is tested usefilly)

system control second ordem