image-degneration-and-restoration

说明：  matlab code for fingerprint orintation

This function used to find peaks of histogram.

一个用来计算高维数据线性图形嵌入的matlab函数，是几乎所有线性降维算法（如LPP, NPE, IsoProjection, LSDA.）都要用的一个文件，在这里上传给大家，一定用得着！(A high dimensional data used to calculate the linear graphics embedded matlab function, is that almost all linear dimensionality reduction algorithms (such as LPP, NPE, IsoProjection, LSDA.) Should be used in a document From here to the U.S., we use gained!)

说明：  电力系统分析软件最新版本psat2.1.6，可以进行各种计算仿真(power flow analysis psat2.1.6)

巴特沃斯滤波器，主要实现的是低通信号，此功能模块的低通曲线很符合理想的幅频特性。(Butterworth filter, the main achievement is low traffic numbers, the low-pass curve is consistent with this function module ideal frequency characteristics.)

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.)

频率细化技术在超低频/极低频电磁信号检测中的应用(Frequency refinement technique in ELF/low frequency electromagnetic signal detection)

matlab实现的turbo编译码仿真。是一款很好的算法实现代码(matlab implementation of the turbo codec simulation. Algorithm is a very good code)

结构动力分析用matlab计算平面桁架的特征值(Structural dynamic analysis using matlab calculating eigenvalues ​ ​ of plane truss)

matlab图像处理实例详解chap11——图像特征分析(matlab image processing examples explain chap11- image feature analysis)