math_experiment

说明：  这是一个matlab控制仿真小程序，对初学者有一定帮助！(This is a small Matlab simulation control procedures for beginners will definitely help!)

计算时间序列的Hurst系数有许多方法，但是其中最准确的就是运用小波法来计计算，本程序源码用Matlab实现了用小波来计算Hurst系数。 (There are many ways of calculating the Hurst coefficient of time series, but one of the most accurate calculation using wavelet method to count the program source code using Matlab achieve wavelet Hurst coefficient.)

说明：  麻雀搜索智能优化算法例程，新型元启发式算法，可用于函数寻优等其他算法的优化。(intelligent optimization)

产生调制信号后，提取调制信号的特征参数的matlab算法。(Generate a modulated signal, the extraction of characteristic parameters of the modulation signal matlab algorithm.)

unknown,it is test matlab file with some error

主要阐述的是使用差分法解一类Bessel方程在不同边界条件下的离散解(elaborated in the main difference is the use of a solution like Bessel equation in different boundary conditions of the Discrete Solutions)

升余弦滤波器设计，产生眼图，输入调制方式为2PAM和4PAM，符号率为1Hz，等效信道滤波器为升余弦滚降成形滤波器(缺省滚降系数为0.5)(Raised cosine filter design, resulting in eye diagrams, input modulation for 2PAM and 4PAM, symbol rate of 1Hz, the equivalent channel filter for shaping raised cosine filter (default roll-off factor of 0.5))

低通系统源程序，简单的例子，主要对于初学者。(low-pass system source code, the simple examples, mainly for beginners.)

The generating systems use Doubly-Fed Induction Generators (DFIGs) to achieve high conversion efficiency and to reduce the installation cost. This paper presents a modeling and Maximum Power Point Tracking (MPPT) control method of DFIG-based variable-speed wind energy conversion system. The generator considered is a wound rotor induction machine whose stator is connected directly to the grid and the rotor is fed through back-to-back Pulse-Width Modulation (PWM) converters. Stator flux-oriented vector control is applied to control the active and reactive current loops independently. The MPPT control method in a Wind Energy Conversion System (WECS) is proposed. The proposed control solution aims at driving the position of the operating point near to optimality. This is a very important aspect to maintain DFIGs efficiently in a variable wind speed. The wind generator is modeled in RSCAD program which is interfaced with the Real Time Digital Simulator (RTDS).

说明：  可以用来计算 二阶锥优化等重要问题， 非常非常 有用 可求解凸优化问题(Use SeDuMi to Solve LP, SDP and SCOP Problems: Remarks and Examples* * This file was prepared by Wu-Sheng Lu, Dept. of Electrical and Computer Engineering, University of Victoria, and it was revised on December 2, 2009. The name of the toolbox, SeDuMi, stands for self-dual minimization as it implements a self-dual embedding technique for optimization over self-dual homogeneous cones. Below we give comments on the usage of this software for the solution of LP, SDP, and SOCP problems. Numerical examples are included for illustration purposes. Some of the examples are from the book: A. Antoniou and W.-S. Lu, Practical Optimization: Algorithms and Engineering Applications, Springer, 2007.)