handwritten-digits_recognition-

cooperative spectrum sensing code

la detection des points interets

matlab Manchest编码实现的m 文件(matlab Manchest coding realize the m file)

说明：  awgn 信道下 ldpc与FQPSK的串行级联系统，(AWGN channel，serially concatenated FQPSK modulation system with ldpc)

Approximation entropy: Approximation entropy which is used in time series to measure the irregularity

students learning code

仿真了LMS算和和牛顿算法以及最速下降算法有图形可以清楚的看到几个算法的收敛速度的快慢(Calculation and simulation of the LMS and Newton algorithm and the steepest descent algorithm can clearly see several graphical convergence of the algorithm for the pace of)

说明：  贝叶斯建网程序，对于初学者有一定的帮助作用，希望能帮上大家的忙(NATALAB BAYES)

本课题研制了一种宽频带的数字锁相放大器，可以完成自动增益和相位 可调整，最长积分时间为100s，适合于频率从10Hz到10kHz，幅值从100nV 到10mV的微弱正弦信号检测。测量结果表明，当采样点数N大于8192时， (This project developed a wideband digital lock-in amplifier, can be completed automatically adjustable gain and phase, the longest integration time of 100s, suitable for the frequency range from 10Hz to 10kHz, amplitude from 100nV to 10mV of weak sine signal detection. The measurement results show that, when the sampling point number N is greater than 8192 hours,)

this program simulates 2D electromagnetic Maxwell equations , by using finite difference time domain method FDTD..and it simulates the perfect matched layer to prevent the reflections that may occure at the boundaries of the problem space