computing-the-histogram

说明：  《数字通信（第四版）》答案 《数字通信》(第4版)是数字通信领域的一本经典教材,通过对概率论及随机过程的复习,详细介绍了数字和模拟信源编码、数字调制信号和窄带信号与系统的特征、加性高斯白噪声中数字通信的调制和最佳调制与检测方法、基于最大似然准则的载波相位估计和定时同步的方法、不同信道模型的信道容量及随机编码、带限信道的信号设计、受到符号间干扰恶化信号的解调与检测问题、自适应信道均衡、多信道与多载波调制、扩展频谱信号和系统、衰落信道上的数字通信。(The solution of "Digital communication" " Digital communication" (4th edition) is a digital communications of a classic textbook in the field, through the review process, the probability of randomly addressed, details of the digital and analog source coding, digital modulation signal and the narrowband signal and system characteristics, additive white Gaussian noise in digital communication modulation and the best modulation and detection methods, based on maximum likelihood criterion of carrier phase estimation and time synchronization method, different channel model of channel capacity and random coding, band-limited channel signal design by ISI worse signal demodulation and detection, adaptive channel equalization, multi-channel and multi-carrier modulation, spread spectrum signals and systems, fading channel digital communications.)

短路电流计算 短路电 流计算 短路电流计算(short-circuit current calculation of short-circuit power flow calculation of short-circuit current calculation of short-circuit current calculation)

It will do the orthogonal frequency division multiplication.

基于角谱法衍射理论的近场菲涅尔衍射的模拟(Fresnel diffraction stimulation based on angular spectral method)

matlab关于floyd算法的源程序，可以自由改变为所需的变量(matlab on the floyd mathemathica)

a file for fft (fast Fourier transform)

一个很不错的matlab 程序，贡献出来与大家共享，希望对大家有所帮助(Matlab a very good process, contribute to share with everyone, and they hope to help everyone)

在TM波激励下，用矩量法仿真导电柱体的散射，得到电流密度与电荷密度随入射角度变化的规律。(In the TM wave excitation, using the method of moments simulation of the scattering conductive cylinder, get the current density and charge density variation with angle of incidence.)

FIR数字滤波器：里面包含四部分程序，分别对一个给定的信号进行低通滤波，高通滤波，带通滤波，带阻滤波（程序有详细的注释，适合新手学习FIR型数字滤波器）(FIR digital filter: which contains four parts of the program, respectively, for a given signal low-pass filter, high pass filter, band pass filter, band stop filter (detailed comments procedures for novice learning FIR digital filter))

对构件进行优化分析时，需要将其剖分成四面体网格单元，本源码可以用来求每一个小四面体的刚度矩阵(Optimization analysis of the components need to be partitioned into tetrahedral grid cell, the source can be used to seek the stiffness matrix of each small tetrahedron)