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we introduce the Color-based Catchment Basin Merging Algorithm, an area-based segmentation approach that is specifically designed to segment low-altitude aerial images, as a preprocessing step to 3D reconstruction. This approach extends the watershed-based Catchment Basin Merging Algorithm, which is purely geometric, by introducing color similarity as an additional criterion to decide on the merging of evolving regions. Experiments performed with real aerial images of varied nature demonstrate that this modification eliminates over-segmentation problems of the existing algorithm, allowing large-scale urban scenes to be segmented in an accurate, reliable and fully automatic way.

八方向均值比例算子，对每个像素点取半径为r的矩阵，分成八个区域，计算均值比例，选取图像中的对比较为明显的区域(Mean proportion of the eight directions operator, a radius r of the matrix for each pixel is divided into eight regions, and calculate the mean ratio, the selected image of the more obvious contrast region)

rotor dynamics toolbox

模糊自整定PID控制系统设计与仿真 飞机俯仰姿态保持模糊PID控制 (Fuzzy self-tuning PID control system design and simulation aircraft pitch attitude to maintain Fuzzy PID Control)

叠前地震数据动校正和叠加的matlab模块，对于学习地震勘探的人十分有效(code for seismic NMO and Seismic stack)

一些血液模型动力学仿真的文章，希望能够对需要的同学有一些帮助。(Some of the blood dynamics simulation model of the article, I hope to be able to have some students who required help.)

说明：  matlab,对解决学习中遇到的实际问题会有很大的帮助(Matlab, learning to solve practical problems encountered in will be a big help)

Implementations of Kalman Filter using both message passing algorithm and standard matrix operations

matlab design of Butterworth Band Pass Filter

压缩感知，又称压缩采样，压缩传感。它作为一个新的采样理论，它通过开发信号的稀疏特性，在远小于Nyquist 采样率的条件下，用随机采样获取信号的离散样本，然后通过非线性重建算法完美的重建信号。(Compressed sensing, also known as compressed sampling, compressed sensing. It as a new sampling theory, it is through the development signal sparse characteristics under conditions of far less than the Nyquist sampling rate, with a random sampling obtain discrete samples of the signal, and then through a perfect reconstruction of the signal of the non-linear reconstruction algorithm.)