surf1

利用STFT可以估计信号在每片短时窗内的频率得到信号的瞬时频率，该曲线由一组时间和频率相对应的点组成，反映了信号频率随时间的变化。(Using STFT can estimate the frequency of the signal in every piece of short-time window get signal instantaneous frequency, the curve consists of a set of time and frequency of corresponding points, reflects the signal frequency changes over time. )

MATLAB CODE FOR DIGITAL COMMUNICATION

关于无线网络的matlab仿真的经典教材第七章， 适合有一定基础的同志们学习(Matlab simulation of wireless networks under Chapter VII of the classic textbook for a certain comrades based learning)

此程序包括重采样中的最邻近法，双线性内插法，三次卷积法。 (resampling)

说明：  卡尔曼滤波用于动态轨迹目标跟踪的算法，欢迎大家下载(Kalman filter for dynamic target tracking algorithm)

永磁电机仿真相关程序，用Matlab编写，希望大家能用上！！！！(PMSM control！！Very Good！！！)

adaboost智能算法源程序，将若分类器反复训练得到强分类器，用于二分类问题(adaboost intelligent algorithm source code, will be repeated if the classifier has been trained strong classifier for the two classification)

neural network using new development method to classifiy

在matlab上的Asift程序，在原有基础上有所改进，程序可以出色地实现图像的识别，匹配，效果相比SIFT，SURF等有大幅提高(In matlab Asift program improvements based on the original, the program can achieve excellent image recognition, matching, compared to the effect of SIFT, SURF, etc. have greatly improved)

利用神经网络BP算法训练下列神经网络模型。 1. y = cosx 2. y = |sinx| 3. 4. (Neural network BP algorithm training following neural network model. 1. Y = cosx 2. Y = | sinx | 3. 4. )