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说明：  四旋翼无人机是一种可以被遥控也可以在无人为控制的状态下执行预定任务的飞行器，与传统直升机相比四旋翼飞行器的机械结构简单，且具有高精度，灵活精度以及较低成本的特点，被广泛用于军事侦察，农艺播撒、快递派送、摄影工作等领域。四旋翼飞行器自身具有欠驱动、多变量、非线性等特性，在外界的噪声干扰情况下，增加了四旋翼无人机的不稳定以及控制系统的设计难度。所以对四旋翼飞行器的位姿控制的研究，可以开拓科研人员对控制算法以及滤波算法的认知，具有重要的研究意义。(Four-rotor UAV is a kind of aircraft that can be controlled remotely or perform scheduled tasks without human control. Compared with traditional helicopters, the Four-rotor UAV has simple mechanical structure, high precision, flexible precision and low cost. It is widely used in military reconnaissance, agricultural broadcast, express delivery, photography and other fields. Four-rotor UAV has the characteristics of under-actuation, multi-variable and non-linearity. Under the circumstance of external noise, the instability of Four-rotor UAV and the difficulty of control system design are increased. Therefore, the research on attitude control of Four-rotor aircraft can broaden the knowledge of control algorithm and filtering algorithm for researchers, and has important research significance.)

用matlab来演奏卡农，比较有意思的一个程序，可以推广到制作电子琴音(Using matlab to play canon, the more interesting of a program can be extended to the production of electronic sounds)

对比各种小波变换的效果，B为输入的原始数据，需要自己添加数据并设置为B(Comparative effects of various wavelet transform, B is the input original data, and the data they need to be added to B)

去斜处理后的加窗操作，线性调频信号，绝对有用，不像其他的那么坑(To deal with the oblique add window after the operation, the linear frequency modulation signal, is absolutely useful, unlike other then pit to oblique processed add window operation, the linear frequency modulation signal, is absolutely useful, unlike other pit)

是基于MATLAB的车牌字符识别程序。只是个大学生做的程序，大家别太苛刻(Is based on the MATLAB license plate character recognition program. Students just do the procedure, we do not be too harsh)

Digital modulation demodulation

AirPrime Q26 Series Development Kit User s Guide

利用牛顿法，加速牛顿法，同伦变换求解非线性方程组的解(Newton method to accelerate the Newton method, homotopy transform Solving the Nonlinear Equations)

AIS matlab 源程序，可以执行。电脑执行过(AIS matlab source, can be performed. Computer to perform)

matlab 学习资料，对于初学者掌握matlab 使用有很大帮助(matlab )