TUXIANGZHONGZHI

matlab file is use to just liquild volumn, now need you to help check it.

compressive sensing theory

正交相移键控 (Quadrature Phase Shift Keying)简称“QPSK”，是一种数字调制方式。它分为绝对相移和相对相移两种。由于绝对相移方式存在相位模糊问题，所以在实际中主要采用相对移相方式DQPSK。目前已经广泛应用于无线通信中，成为现代通信中一种十分重要的调制解调方式。(QPSK THAT IS TO SAY....)

常微分方程的求解(自适应步长的龙格库塔法)(The solution of ordinary differential equations (adaptive step Runge-Kutta method))

求小圆柱波浪力，主要是波浪理论里面的狭长小圆柱体求解片段(wave force)

This program in Matlab code, calculates resonance frequencies of a 1D cavity by using FDTD method

说明：  好的读图程序，使matlab可以迅速读出img等格式的图像，方便图像在envi与matlab之间转换(Good in image process, so you can quickly read matlab img image formats for easy image conversion between the envi and matlab)

simple way to implement pca for beginner

说明：  运动载体的定位与导航一般应用Kalman滤波算法。可 靠的Kalman滤波算法要求有可靠的函数模型、随机模型以 及合理的估计方法。实际情况中运动载体一般难以确保规 则运动，因而精确的函数模型的构造十分困难。近年来， 有不少学者对机动载体运动模型进行了讨论，所属内容各 具特点，建立的各种模型包括微分多项式模型、常速度模 型、常加速度模型、时间相关模型，半马尔柯夫模型、 Noval统计模型及机动载体的“当前”统计模型(Moving vehicle positioning and navigation general application of the Kalman filter algorithm. Kalman filter algorithm requires a reliable function model, a stochastic model, as well as a reasonable estimation method. Moving carrier in the actual situation is generally difficult to ensure a regular motion, and thus the the precise function model structure is very difficult. In recent years, many scholars have discussed the movement of the motor carrier model, each with distinct characteristics of their respective content, establish various models including the differential polynomial model, constant velocity model, constant acceleration model, time-dependent model, semi-Markov model, Noval statistical model and motor carrier &quot current&quot statistical model)

说明：  全相位FFT与传统FFT对比图，包括幅值曲线 相频曲线(Comparison of all phase FFT and traditional FFT)