NFEA

An implementation of Unscented Kalman Filter for nonlinear state estimation. (Nonlinear state estimation is a challenge problem. The well-known Kalman Filter is only suitable for linear systems. The Extended Kalman Filter (EKF) has become a standarded formulation for nonlinear state estimation. However, it may cause significant error for highly nonlinear systems because of the propagation of uncertainty through the nonlinear system. The Unscented Kalman Filter (UKF) is a novel development in the field. The idea is to produce several sampling points (Sigma points) around the current state estimate based on its covariance. Then, propagating these points through the nonlinear map to get more accurate estimation of the mean and covariance of the mapping results. In this way, it avoids the need to calculate the Jacobian, hence incurs only the similar computation load as the EKF. For tutorial purpose, this code implements a simplified version of UKF formulation, where we assume both the process and measurement noises are additive to avoid augment of state and a)

说明：  利用Matlab中的simulink工具箱仿真。单相桥式PWM逆变电路，采用单极性触发方式，负载 ，电源 ，建立模型，制作PWM触发模块，画出基波幅值与占空比关系图。(Using simulink toolbox of Matlab simulation. Single-phase PWM bridge inverter circuit, the use of unipolar trigger mode, load, power, establishment of model, trigger the production of PWM module, draw the fundamental relationship between the amplitude and duty cycle.)

采用Matlab编写的一个跟踪代码,能很好的跟踪汽车等刚性目标(Matlab prepared a tracking code can be a good tracking vehicles rigid targets)

Corrects lightening using a quadratic fit.

说明：  在matlab下用神经网络来识别数字1到9(matlab number recognition)

this programs transforms a matrix to a vector which is used after applying a hamming window with 50 overlap and totally useful for speech enhancement

超声成像的matlab仿真，挺有用的，各位可以尝试改一改。(simulation for ultrasoung imaging)

一篇空时码的综述文章，以及给出了1*1，1*2，2*1，2*2接收发机天线结构的matlab仿真程序。(A space-time code synthesis article, as well as give a 1* 1,1* 2,2* 1,2* 2 receiver antenna structure of hair matlab simulation program.)

这是模式识别中模板匹配内容的Matlab例程，其中edit_distance程序用来计算两个符号字符串间的编辑距离； back-tracking程序是“回溯”法画出最佳路径的代价网格； Dtw-Sakoe.m程序是具有Sakoe-Chiba局部路径约束的动态时间弯 折。(This is a pattern recognition template matching the content of Matlab routines, which edit_distance procedures used to calculate the two symbols of the edit distance between strings back-tracking program is " back" method to draw the best path cost grid Dtw- Sakoe.m program is a Sakoe-Chiba local path constraint of the dynamic time warping.)

Matlab Code for making simple noise to image and denoise the image with some good filters