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The modeling and attitude stabilization control problems of a four-rotor vertical takeoff and landing unmanned air vehicle (UAV) known as the quadrotor are investigated.The quadrotor’s attitude is represented by the unit quaternion rather than Euler angles to avoid singularity problem. Taking dynamical behavior of motors into consideration and ignoring aerodynamic effect, a nonlinear controller is developed to stabilize the attitude.The control design is accomplished by using backstepping control technique.The proposed control law is based on the compensation for the Coriolis and gyroscope torques. Applying Lyapunov stability analysis proves that the closed-loop attitude system is asymptotic stable. Moreover, the controller can guarantee that all the states of the system are uniformly ultimately bounded in the presence of external disturbance torque.The effectiveness of the proposed control approach is analytically authenticated and also validated via simulation study.

recursive least squares (RLS) with forgetting factor

matlab programming for clustering pam , k-means , dbscan , optics for image segmentation

利用MATLAB进行带通数字调制与解调——M元正效幅度键控调制。(we use MATLAB for bandpass digital modulation and demodulation- M Yuan positive effect amplitude shift keying modulation to achive a good understanding.)

It is about state vector machine.

单领航者基于距离的协同导航定位, EKF算法, 算法流程部分可以封装为函数直接调用, 还给出了初始化, 用的时候自己分开.(EKF Collaborative navigation based on distance with single leader )

线性预测在MATLAB中的实现，非常具有参考价值的文档(Linear prediction in the MATLAB implementation of the document is a reference value)

This is a program for extracting objects from an image. Written for vehicle number plate segmentation and extraction.

本文件给出了科学计算所涉及的常用问题的源程序，同时给出了一些例题，适应初学Matlab者。(This document gives the commonly used scientific computing problems involved in source code, and gives some examples, those who meet the novice Matlab.)

合成孔径雷达的RD算法程序合成孔径雷达的RD算法程序合成孔径雷达的RD算法程序(RD algorithm for synthetic aperture radar synthetic aperture radar, RD program algorithm of the RD process synthetic aperture radar algorithm program)