sun

Code to process leaf disease detection

由于卫星与用户接收机二者的连线方向上存在相对运动，因此引起了载波和伪码的多普勒效应，再加上接收机晶体震荡频率漂移和卫星时钟频漂等原因。接收机实际接收到的卫星载波中心频率一般不再等于信号被发射时的标称频率，这就需要接收机在载波频率一维对信号进行搜索。同时，由于卫星到接收机的距离时刻变化，加上接收机始终相对于GPS时间的偏差又并不固定，因而接收信号的伪码相位值也在改变，所以接收机也要在码相位一维对信号进行搜索。扩频信号的捕获是一个对目标信号频率域和相位域进行的二维搜索过程。(Because of the relative motion between the two of the satellite and the user receiver, the Doppler effect of the carrier and pseudo-code is caused, and the frequency drift of the oscillation of the receiver crystal and the frequency drift of the satellite clock are added. The frequency of the satellite carrier center that the receiver actually receives is generally no longer equal to the nominal frequency of the signal being transmitted, which requires the receiver to search the signal in one dimension of the carrier frequency. At the same time, because the distance between the satellite to the receiver is changed, the deviation of the receiver always relative to the GPS time is not fixed, so the pseudo code phase value of the received signal is also changing, so the receiver also searches for the signal in the code phase. The acquisition of spread spectrum signal is a two-dimensional search process for the frequency domain and phase domain of the target signal)

k-means分类测试，通过自己建造数据集测试分类方法使用效果(K- means classification test, by building their test data set classification method using effect)

对线性系统和非线性系统进行的仿真，使之能在较逼真的建模(Of linear systems and nonlinear systems of simulation, so in a more realistic modeling)

used to determine the value of colour spaces

wm implementation code

ds cdma in communication

matrix converter simulatin

通过多次迭代消除子载波间干扰，降低误码率(Using iteration approach to suppress intercarrier interference in OFDM system)

说明：  在matlab中实现四节点板单元刚度矩阵求解，振动模态分析(Realize the solution of the stiffness matrix of the four-node plate element and the vibration modal analysis in matlab.)