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this is matlab code for ifft , fft example and some of communcation example

NEGF method to calculate the resonant tunnelling diode

地球化学数据处理一种常见算法SAMCF，对于识别弱小异常有较大价值(a widely-used method named SAMCF to identify weak anomaly,which has been acknowledged )

CS七龙珠1.2.3版本孙悟空变超级赛亚人第4阶的源码,使用AMXX版本:1.8.1(ESF1.2.3 Sun Wukong becomes a Super Saiyan fourth order of the source code, using the AMXX version: 1.8.1)

好用的随机森林回归（RFR），也可用与分类。基于以编译的mex84，可实现bias-correction。回归预测精度较高(applicable random forrest regression，can also be used for classification。Regress with bias-correction 。can achieve high accuracy)

有关调制解调的全面程序包，里面的文件夹名字有点乱，但很全面，不要错过哦(For the full modem package, inside the folder name a little messy, but it is full, do not miss it)

说明：  并联机构 机器人 工作空间 刚度 轨迹贵乎啊 (work space)

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.

带有电压恢复补偿功能的直流微电网下垂控制，适用于孤岛运行(droop control based on voltage compensation)

说明：  matlab的一些基础讲解，适用于初学者。主要是关于在数字信号处理课程中的应用。(to explain some basic matlab for beginners. Mainly on the course in digital signal processing applications.)