LFM

match by SIFT with two of gray images

用MATLAB中的simulink对DQPSK进行仿真(Using MATLAB in the simulink simulation of the DQPSK)

The architecture of this set of codes and the interaction among them is shown in Figure 1. The main testing code main code.m calls the code riemann grad unit opt.m that performs Riemannian optimization under unitary matrix constraint. Steepest Descent/Ascent (SD/SA) algorithm (see Table 3.2 in [1]), Conjugate Gradient (CG-PR, CG-FR) algo- rithms (both Fletcher-Reeves and Polak-Ribi`ere formulas, see Table 3.3 in [1]), are im- plemented. This code further calls the codes implementing line search methods: Armijo method geod search armijo.m, as well as the polynomial and DFT-based approximation

电力系统潮流计算，可以计算电压，相角，幅值(Power flow calculation, you can calculate the voltage, phase angle and amplitude)

基于延迟线的数字脉冲宽度调制，用于电力电子设备的触发信号产生(puls wide modulator based on delayline)

说明：  noma simulation programme in matlab

NumPy Beginner’s Guide - Second Edition的源码（《Python数据分析基础教程，munpy学习指南（第二版）》），有助于学习numpy。(NumPy Beginner s Guide- Second Edition source code ( Python data analysis based tutorial, munpy Study Guide (Second Edition) ), contribute to learning numpy.)

STEGANOGRAPHY LSB BY 4 BITS

projected coordinate systems

对比LDPC Hamming 循环卷积码三种编码方式的误码率(Contrast BER LDPC Hamming codes are three circular convolution encoding)