ch9_ex

MATLAB6.5辅助图像处理，很有用，适合于广大学者。(MATLAB6.5 assisted image processing, useful for the general academic.)

this is the standard pso code

无线中继选择 包括AF、DF中继选择算法的对比 以数据吞吐量作为依据(Multiple Relaying in wimax)

一个用matlab编写的关于图像处理中的灰度化和二值化。(A prepared using matlab image processing on grayscale and binary.)

提供了外文文献具体解释了HHT得缺陷之一，模态混叠现象。 通过matlab的仿真具体解释了HHT用于信号分析时出现模态混叠的临界点。(english papers to explain one of the limitations of HHT-MODE MIXING simulation base on MATLAB provide graph to improve that limitation)

土木工程领域，非线性杆系有限元matlab程序。参考书籍为普林斯顿大学教授编写的NFEM讲义。(Civil engineering, nonlinear finite element matlab program. Reference books for Princeton University professor NFEM written handouts.)

说明：  信号卷积的matlab实现，比较简单的程序，解释清楚易懂，对信号分析的同学会有些帮助(Convolution by matlab)

excellent amazing......................

sharppart function for wavelet analysis

针对永磁同步电机常规直接转矩控制系统涉及到的问题,例如磁链的准确观测、定子电阻的变化、电压矢量开关表的改进以及滞环控制器的改进等等,本文都作了详细的分析,并提出了改进方案。为了提高系统的性能,本文将空间矢量调制的方法引入了常规直接转矩控制中,并在此基础上,对永磁同步电机无速度传感器问题作了详细的分析,总结了国内外的研究热点,提出了采用转子磁链矢量为基础的永磁同步电机直接转矩控制速度估计方法。仿真结果表明,该方案具有很好的动、静态特性。(Firstly, the paper analyzes the principle of direct torque control of permanent magnet synchronous motor and elaborates the impact of space voltage vector of the stator flux and the electromagnetic torque.Secondly, the paper introduces direct torque control of permanent magnet synchronous motor SVPWM technology.Under the same hardware conditions,the system can obtain More continuous voltage space vector by taking advantage of SVPWM.The simulation results show the program not only keeps the direct torque control fast dynamic response, but also reduce the motor torque ripple.)