chengjichaxun

Encoded by Systematic convolutional code, decoded by Viterbi using Hamming distance.

给出卫星适当的初始位置和速度，利用其运动微分方程，求出2－3个周期内的轨道，并画出机械能和动量矩的大小随时间变化的曲线。(Given appropriate initial satellite position and velocity, using the equations of motion, find the 2-3 cycle track, and draw mechanical energy and angular momentum of the size of the curve over time.)

局部均值分解算法，适用于从事机械信号处理研究人员，对LMD方法的初步认识(Local mean decomposition algorithms for signal processing researchers in mechanical preliminary understanding of the LMD method)

对心率变异性（HRV）曲线进行时域分析时候，主要参数SDNN，SDANN，SDNN_INEDX等的matlab计算程序。(On heart rate variability (HRV) curve when the time-domain analysis, the main parameters SDNN, SDANN, SDNN_INEDX etc. matlab calculation program.)

电磁波电场强度的取向和幅值随时间而变化的性质，在光学中称为偏振。如果这种变化具有确定的规律，就称电磁波为极化电磁波（简称极化波）。如果极化电磁波的电场强度始终在垂直于传播方向的（横）平面内取向，其电场矢量的端点沿一闭合轨迹移动，则这一极化电磁波称为平面极化波。电场的矢端轨迹称为极化曲线，并按极化曲线的形状对极化波命名。因此如果E的失端轨迹是圆，则此电磁波称为圆极化波。(The properties of the orientation and amplitude of the electric field intensity of electromagnetic waves vary with time, which are called polarization in optics. If this change has a definite law, the electromagnetic wave is called polarization electromagnetic wave (called polarization wave). If the electric field intensity of the polarized electromagnetic wave always orientations in the plane perpendicular to the propagation direction, the terminal point of its electric field moves along a closed path. Then the polarized electromagnetic wave is called the plane polarized wave. The vector end track of the electric field is called the polarization curve and is named for the polarized wave according to the shape of the polarization curve. Therefore, if the lost track of E is a circle, the electromagnetic wave is called a circular polarization wave.)

RLS matlab program, very good

模式识别，聚类分析的最大最小距离算法算法Matlab演示(Pattern recognition, cluster analysis algorithm for the maximum minimum distance algorithm Matlab demo)

说明：  接收端选择性多样化，用于优化瑞丽信道的衰落，减少误码率(selection diversity)

用matlab实现了PID 控制的编程，得到了较好的控制效果(Realize a PID control with matlab programming, get a better control effect)

Implementation of DQ theory based PLL