FFT

利用matlab编了一个pendulum仿真的例子，用来测量Gravity，希望对大家有帮助(Matlab made use of a pendulum simulation examples, used to measure Gravity, hope everyone has to help)

电子通信系统的建模与仿真 第9章 天线及智能天线仿真 9.1 全向天线的波束下倾 9.2 天线阵的波达方向估计 9.3 天线阵的波束形成?(Electronic communications system modeling and simulation of Chapter 9 of the antenna and smart antenna simulation 9.1 omnidirectional antenna beam antenna array under the dump 9.2 Direction of Arrival Estimation 9.3 Antenna Array Beamforming ?)

主成分分析(Principal Component Analysis, 简称PCA)是一种常用的基于变量协方差矩阵对信息进行处理、压缩和抽提的有效方法。 (The principal component analysis (Principal Component Analysis, PCA) is a common covariance matrix of information processing, compression and extraction.)

粒子群算法，也称粒子群优化算法（Particle Swarm Optimization），缩写为 PSO， 是近年来发展起来的一种新的进化算法(Evolutionary Algorithm - EA)。PSO 算法属于进化算法的一种，和模拟退火算法相似，它也是从随机解出发，通过迭代寻找最优解，它也是通过适应度来评价解的品质，但它比遗传算法规则更为简单，它没有遗传算法的“交叉”(Crossover) 和“变异”(Mutation) 操作，它通过追随当前搜索到的最优值来寻找全局最优。这种算法以其实现容易、精度高、收敛快等优点引起了学术界的重视，并且在解决实际问题中展示了其优越性。粒子群算法是一种并行算法。 BP（Back Propagation）神经网络是1986年由Rumelhart和McCelland为首的科学家小组提出，是一种按误差逆传播算法训练的多层前馈网络，是目前应用最广泛的神经网络模型之一。BP网络能学习和存贮大量的输入-输出模式映射关系，而无需事前揭示描述这种映射关系的数学方程。它的学习规则是使用最速下降法，通过反向传播来不断调整网络的权值和阈值，使网络的误差平方和最小。BP神经网络模型拓扑结构包括输入层（input）、隐层(hidden layer)和输出层(output layer)。(Particle swarm optimization, also known as particle swarm optimization (Particle Swarm Optimization), abbreviated as PSO, is a new evolutionary algorithm developed in recent years (Evolutionary Algorithm- EA). Kind, and simulated annealing algorithm PSO algorithm is similar evolutionary algorithms, it is also starting a random solution, through an iterative search for the optimal solution, which is also used to uate the quality through fitness solution, but it is simpler than genetic algorithm rules It has no genetic algorithm " crossover" (Crossover) and " variant" (Mutation) operation, which by following the current search to find the optimal value to the global optimum. This algorithm is its easy implementation, high accuracy, fast convergence, etc. attracted academic attention and show its superiority in solving practical problems. PSO algorithm is a parallel algorithm. BP (Back Propagation) neural network is a 1986 team of scientists headed by Rumelhart and McC)

source code for matlab simulation

最小二乘回归分析算法，是机器学习的例程，电力系统暂态稳定程序，可以进行暂态稳定计算。( Least-squares regression analysis algorithm, Machine learning routines, Power System Transient Stability Program, can be transient stability.)

说明：  本源码实现遗传算法，用于RA准则下的多用户OFDM自适应资源分配(A genetic algorithm based on source code for adaptive resource allocation in multi-user OFDM under RA criterion)

对MATLAB软件在控制领域的应用进行了详细介绍。内容包括使用DAS工具箱函数和ActiveX控件设计数据采集与控制程序；使用串口I/O流和MSComm控件设计串口通信程序等。每种程序设计方法都提供了多个典型应用实例，每个实例都提供了线路图、详细的程序设计步骤和完整的源代码可供自动化、计算机应用、电子信息、机电一体化、测控仪器等专业的大学生、研究生及相关技术人员学习和参考。 (MATLAB software in the control area of the application in detail. Content including the use of ActiveX controls DAS Design Toolbox functions and data acquisition and control procedures use the serial port I/O design flow and MSComm control serial communication procedures. Each programming methods provide a more typical application, each instance provides a road map, detailed program design steps and the complete source code for automation, computer applications, electronic information, mechanical and electrical integration, measurement and control instruments professional students, graduate students and relevant technical staff to learn and reference.)

说明：  这个是一个介绍OFDM原理的资料，对于初学者来说很好用(This is an introduction to the principle of OFDM data is useful for beginners)

双闭环可逆直流调速（H桥） 波形很稳定 适合用于学习(Reversible double-loop DC speed (H-bridge) is very stable waveform suitable for learning)