FENXING-QU-MIAN

说明：  用matlab仿真的信号的fft变换的时域,频域图形(simulation using Matlab Signal fft transform in time domain, frequency domain graph)

垂直分层编码ZF检测算法程序代码问题，此程序是在调制方式为QPSK或4QAM下，未编码的V-BLAST系统 计算噪声功率时,信号的功率要用总的接收信号的功率.每根接收天线上的噪声功率是相同的.同时总的信号能量归一化,每根天线上发送的信号能量是总的发 送能量的1/Nt,其中Nt是发送天线数, 改变发送天线Nt和接收天线数目Mt,可以比较QPSK和4QAM时4发4收,4发6收,8发8收,8发12收等多发多收的情况 (Vertical stratification coding ZF detection algorithm program code, the process is in a way for QPSK or 4 QAM, not coding V-BLAST system Calculating noise power, the power of the signal with general received signal power. Each root receiving antenna on the noise power are the same. And general signal energy normalization, each blade on the signal energy send antenna is overall hair Send energy 1/Nt, of which is transmitting antenna Nt number, change the transmitting antenna Nt and receiving antenna number Mt, can compare QPSK QAM and 4 when the hair 4 4, 4 hair and accept, eight hair 8 accept, eight hair 12 accept etc multiple collect more of the situation )

说明：  光伏并网逆变器仿真，包括直接功率控制和svpwm控制（基于PI）(Photovoltaic grid-connected inverter simulation, including direct power control and SVPWM control (based on PI))

宽带信号的空间谱估计以及信噪比等对信号估计的影响，才用聚焦矩阵的方法，采用的聚焦矩阵不同，性能也不同，这里是RSS算法(Spatial spectrum estimation of wideband signals and SNR of the estimated impact on the signal only with the focusing matrix method, using the focusing matrix of different, performance is different, here is the RSS algorithm)

说明：  三相三线并联型有源电力滤波器模型，可完美运行仿真结果。(Three-phase three-wire shunt active power filter model can run the simulation results perfectly.)

平面应力矩形单元有限元分析，并画出网格图形，用星号标记受力点，用叉号标记受约束点，最后求出力、位移和主应力。(Rectangular plane stress finite element analysis, and draw the grid graph, marked with an asterisk stress points marked with crosses by constraints, and finally seek to contribute, displacement and principal stress.)

直流微网继电保护策略实现S-function的M文件，主保护为母线直流差动保护，基于小波分解的高频故障电流保护，后备保护为过电流保护，针对系统为2进2出的微网，只需将电流值输入，其中第一个输入变量为开关，为保护算法控制开始/关闭。(The relay protection strategy of DC microgrid realizes the M file of S-function. The main protection is busbar DC differential protection. The high frequency fault current protection based on wavelet decomposition and the backup protection is overcurrent protection. For the microgrid with 2 in and 2 out of the system, only the current value is input. The first input variable is switch, which starts/closes for the control of the protection algorithm.)

亚波长光删模拟程序，可以修改参数，得到不错的结果，值得学习(Sub wavelength delete simulation program, you can modify the parameters, get good results, it is worth learning)

说明：  关于MATLAB程序设计基础的一篇文章，挺好的。(On the MATLAB program design based on an article, quite good.)

RADAR RADIATION PATTERN, Transmit-mode Radiation Pattern, Doppler Spectrum of Transmit-mode Radiation Pattern, Doppler Spectrum of Transmit-Receive Mode Radiation Pattern