Laplace_FDM_3D

合成孔径雷达的RD算法程序合成孔径雷达的RD算法程序合成孔径雷达的RD算法程序(RD algorithm for synthetic aperture radar synthetic aperture radar, RD program algorithm of the RD process synthetic aperture radar algorithm program)

本书适用于有了一定matlab基础的人群，旨在matlab工程上的各种应用，不论是学习还是工作，都非常有用(This book is for people with certain basic matlab, matlab engineering to a variety of applications, whether learning or work, are very useful)

实验一 双极性矩形随机信号的归一化功率谱密度一 1.1 功率谱密度简介 平稳过程的任何一个非零样本函数的持续时间为无限长，显然都不满足绝对可积和总能量有限的条件。因此，它的傅里叶变换不存在即没有频谱函数。所以我们用功率谱密度来表述其频谱特性。 随机过程的任一实现是一个确定的功率型信号。而对于任意的确定功率信号f(t)，它的功率谱密度为： 式中， 是f(t)的截短函数 对应的频谱函数。f(t)是平稳随机过程 的一个实现。而随机过程某一个实现的功率谱密度不能作为过程的功率谱密度。过程的功率谱密度应该看作是任一实现的功率谱密度的统计平均，即 虽然该式给出了平稳随机过程的功率谱密度，但我们通常都不利用这个式子来计算功率谱。我们知道，确知的非周期功率信号的自相关函数与功率谱密度是一对傅里叶变换。对于平稳随机过程，也有类似的关系，即 和 对于平稳随机过程我们通常先求出其自相关函数再利用上式求出其功率谱密度。 1.2 实验要求  1.了解平稳随机信号功率谱的概念及计算方法  2.仿真不同占空比，等概、非等概双极性矩形随机信号的归一化功率谱密度  3.分析不同信号所包含的频谱分量，有无直流分量和定时分量信息 (A pair of rectangular random experiment polarity signal sample return a nonzero function of any duration power spectral density of a 1.1 power spectral density of a stationary process Introduction of infinite length, apparently not satisfied absolutely integrable and the total energy of the limited conditions. Therefore, it is the Fourier transform of the spectrum that does not function does not exist. Therefore, we use the power spectral density to express their spectral characteristics. Any random process is a realization of a certain type signal power. For arbitrarily determined power signal f (t), its power spectral density is: wherein, is f (t) is a function corresponding to the truncated spectrum function. f (t) is a stationary random process of realization. The random process to achieve a certain power spectral density can not serve as the power spectral density of the process. Power spectral density process should be seen as a statistical average power spectral density of any r)

测度贴近度计算，用matalb编写，数据由外部数据文件调入(measure close to the calculation used matalb preparation, data from external data files transferred)

此程序用于实现结构的有限元计算：将patran中的模型的bdf文件中的单元信息和节点信息保存成txt文档，在matlab中调用，就可实现刚度矩阵、质量矩阵的组装，进而有限元计算(This procedure is used to achieve the structure of the finite element method: bdf file of the model in patran unit information and node information is saved into a txt file called in matlab, you can achieve the stiffness matrix, mass matrix assembly, and then the finite elementcalculate)

MATLAB FFR THIS IS GOOF FILE I THOUGHT

各种PID控制器(模糊自适应整定PID,积分分离式PID),求导的两个方法((Fuzzy adaptive tuning PID, Integral separate PID), two methods of various derivative PID controller)

基于阶跃响应的专家控制器，并使用matlab编写的m文件进行仿真(Based on the step response of the expert controller, and use the preparation of the m file matlab simulation)

三维直角坐标系FDTD应用UPML吸收边界条件，激励源为高斯脉冲(Three-dimensional Cartesian coordinate system FDTD application UPML absorbing boundary conditions, excitation source for the Gaussian pulse)

说明：  基本源代码程序，针对Artificial neural network人工神经元网络书中的源代码实例(Artificial neural network)