pipei

qc—ldpc编码的matlab源码，分为好几个版本，small文件夹里的支持小的稀疏矩阵，large文件夹里的支持较大的稀疏矩阵。test文件为顶层(qc-ldpc the matlab source code is divided into several versions, small folder in the support of a small sparse matrix, large folder in the support of a larger sparse matrix. test document for the top-level)

说明：  迭代法 迭代式阈值选取的基本思路是:首先根据图像中物体的灰度分布情况， 选取一个近似阈值作为初始阈值(Iterative threshold selected basic idea is: First, the gray-scale distribution of objects in the image, select an approximate threshold as initial threshold)

在自重作用下隧道的围岩和衬砌的变形的matlab有限元计算源程序，配套书籍是《ansys分析与matlab编程：徐荣桥》(Under its own weight of tunnel surrounding rock and lining deformation matlab finite element source, supporting the book is " ANSYS analysis and the matlab programming: Xu Rong bridge" )

Bottom Up Profiling shows the entire callstack backwards.

说明：  （本科生课程设计）主要实现的功能是设计一个恒压恒频正弦波逆变电源，具体参数如下：单相交流输入220V/50Hz，输出单相交流电压110V/50Hz,THD<5 ,负载为一般的阻感负载，功率1500W。利用matlab中simulink实现仿真功能。(The main functions of the (undergraduate curriculum design) is designing a constant voltage constant frequency sine wave inverter, specific parameters are as follows: single-phase AC input 220V/50Hz, output single-phase AC voltage 110V/50Hz, THD &lt 5 load general resistance inductive load, power 1500W. Matlab in simulink simulation capabilities.)

一、穆勒矩阵构成 穆勒矩阵是一个4*4的矩阵，完整描述了介质的偏振属性。可通过水平线偏振光H、垂直线偏振光V，45°线偏振光P，右旋圆偏振光R入射，并分别探测水平线偏振光H、垂直线偏振光V，45°线偏振光P，右旋圆偏振光R出射情况下的能量值，即16种偏振态组合下的强度结果，HH/ HV/ HP/ HR，PH/ PV/ PP/ PR，VH/ VV/ VP / VR和RH/ RV/ RP/ RR。进而Mueller矩阵可按照公式（1）计算得到：(First, the Muller matrix The Muller matrix is a 4*4 matrix that completely describes the polarization properties of the medium. The horizontal line, vertical line polarized light polarized light H V, 45 degrees P linearly polarized light, right circularly polarized incident detection and R, respectively, H vertical horizontal line polarized light polarized light V, 45 degrees P linearly polarized light, right circularly polarized light R emitted under the condition of energy intensity results of 16 kinds of polarization combinations HH/ HV/, HP/ HR, PH/ PV/ PP/ PR VH/, VV/ VP and RH/ RV/ RP/ RR / VR. Furthermore, the Mueller matrix can be calculated according to formula (1):)

Scilab培训教程，scilab是可代替MATLAB的开源软件，其程序语言与MATLAB相似，有很好的发展前途。(Scilab training course, scilab is the open source alternative to MATLAB, the MATLAB language and similar procedures, have good development prospects.)

通过使用平面波发计算光子晶体能带图，这个图是我自己弄的，非常辛苦。但是希望能给从事光学研究的朋友的带来帮助。(Calculating the bandgap of a photonic crystal by using a plane wave gives me a very hard picture of myself. But I hope to help those who engage in optical research.)

蒙特卡洛方法 有趣的蒙提霍尔问题 求选中汽车的概率的模拟值向量(Monte Carlo method interesting Monty Hall problem seeking the analog value of the probability of the selected car vector)

此源码用于对一些非线性的方程组进行求解，时间复杂度比较小，效率比较高(This source is used for some non-linear equations is solved, the time complexity is relatively small, more efficient )