802.3-2012_section4

说明：  坐标转换，从地固坐标系的笛卡尔直角坐标到大地坐标，考虑到不同的椭球参数。(function to calculate the geodetic Earth-fixed coordinates from Cartesian coordinates )

ofdm implementation with noise(AWGN)

经典粒子群算法的matlab实现代码。用函数进行测试实验，并给出算法寻优迭代的效果图(Classical PSO algorithm matlab. Experiments with test functions, and gives an iterative optimization algorithm renderings)

说明：  求解最短路问题，求解图论中任意两点间最短距离(Solving the Shortest Path Problem)

matlab example code 工具包(matlab example code toolkit)

说明：  This file contains matlab codes for non-linear estimation of Extende Nelson-Siegel (ASS) yield curve model

power electronic transformer

3DFDTD用来计算三维光子晶体在入射波照射下的透过率情况(3DFDTD used to calculate the three-dimensional photonic crystal in the case of incident radiation transmittance)

to understand the Algorithm go to matlab help in page dct2 and idct2 to get the mathematical expression for M = N = 8, we can calculate the most of hard values and save it as LUTs to speed up the execution now compare our special 8X8 functions with the internal general functions use this code: A = int32(100*rand(8,8)) tic for i = 1 : 1000 IDCT_8X8(DCT_8X8(A)) end toc tic for i = 1 : 1000 idct2(dct2(A)) end toc i had built the general functions too, but with low speed (to understand the Algorithm go to matlab help in page dct2 and idct2 to get the mathematical expressionfor M = N = 8, we can calculate the most of hard values and save it as LUTs to speed up the executionnow compare our special 8X8 functions with the internal general functionsuse this code: A = int32 (100* rand (8,8)) tic for i = 1: 1000 IDCT_8X8 (DCT_8X8 (A)) end toc tic for i = 1: 1000 idct2 (dct2 (A)) end toc i had built the general functions too, but with low speed)

fnnsb函数是用来计算非负最小二乘拟合参数的，(fnnsb function is used to calculate the non-negative least-squares fitting parameters,)