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利用MATLAB解决偏微分方程中的一些问题,如插值求解(Partial Differential Equations using MATLAB to solve some problems, such as interpolation to solve)

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good work on Pole placement method

共振解调法诊断轴承损伤类故障的原理概述如下:当轴承某一元件表面出现局部损伤时，在受载运行过程中要撞击与之相互作用的其它元件表面，产生冲击脉冲力，由于冲击脉冲力的频带很宽，必然包含轴承外圈、传感器甚至附加的谐振器等的固有频率而激起这个测振系统的高频固有振动。根据实际情况可以选择某一高频固有振动作为研究对象，通过中心频率等于该固有频率的带通滤波器把该固有振动分离出来。然后进行包络解调，去除高频衰减振动的频率成分，得到只包含故障特征信息的低频包络信号，对这一包络信号进行频谱分析便可以容易地诊断出轴承的故障来。(The principle of resonance demodulation method in the diagnosis of bearing damage such failure overview is as follows: when the bearing surface of a local damage, in the process of loading operation to hit with other elements of the interaction of surface, impact pulse power, due to the impact pulse frequency band is very wide, inevitably contains the bearing outer ring, sensors and even additional resonator and stir up the natural frequency of the vibration system of the high frequency vibration mode.A high frequency vibration mode can be selected according to actual situation as the research object, through the center frequency is equal to the natural frequency of the bandpass filter to separate the natural vibration.Then envelope demodulation, frequency components to remove the high frequency vibration attenuation, get only includes fault feature information of low frequency envelope signal, the envelope signal spectrum analysis can be easily diagnosed bearing failure.)

异步电机功率开关控制，经调试改进，绝对正确(power_syncmachine)

图像拼接的matlab代码，可以作为参考(Image mosaic matlab code, can be used as reference)

Tarel的图像快速去雾算法，可以实现灰度和彩色图像的去雾，将文件中的图像读取路径进行修改即可。(Tarel fast algorithm of image dehazing, can be used to both gray and color images to fog.please replace image read path )

主要用于实现基于TOA/AOA/RSS/QRSS的二维定位算法，用matlab程序实现，内附有注释(Mainly used to implement based on TOA/AOA/RSS/QRSS two-dimensional positioning algorithm, using matlab program, enclosing a Comment)

表情识别 matlab 支持向量机分类器( matlab SVMcalssfier expression recognition)

说明：  一个控制系统的PID参数寻优的单纯形法的MATLAB的程序， 无解压密码(a PID control system parameter optimization of the Simplex Method MATLAB procedures, without extracting passwords)