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《精通GUI图形界面编程》一书的电子版，PDF格式(" Proficient in GUI graphical interface programming," an electronic version of the book, PDF format)

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.

最新的流行学习降维工具箱，并且附上安装说明version 0.8b (18-April-2012)(the newest drtoolboxversion 0.8b (18-April-2012)and install readme)

matlab 基础教程的课件 ，第二章，对初学者有一定作用。(matlab Essentials courseware, and the second chapter, there is a role for beginners.)

It s a set of examples in matlab to learn PID how to set it and how to tune it

Description: soft source, 1D,absorbing boundary condition (which really only work for epsrel=murel=1), reflection at an interface type ward_fdtd1d to run. (Description : soft source, 1D. absorbing boundary condition (which really on ly work for murel epsrel = = 1) reflection at an interface to type ward_fdtd1d run.)

用Goldstein法求解一维函数的极值 (By Goldstein method for solving one-dimensional function of the extreme)

用matlab语言，根据 碟形算法编写的fft变换函数(Using matlab language, according to prepared dish algorithm fft transform function)

Symbol Synchronisation using matlab

能够将采集到的压力波数据TXT文件读出来，并显示波形(Able to read out the pressure wavedate collected and then display)