pnet_putvar

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.

Prob log domain simple Decoding procedure in matlab m-file

说明：  带时间滞后项的最小二乘法，主要用于金融时间序列数据的拟合(least square method)

基于三叉树的期权定价模型，包括路径依赖型，向下敲出期权等奇异期权(Trinomial tree option pricing model, including path-dependent, and down to knock out the options and exotic options)

经典的标量JA 模型的代码，非常适合磁滞模型初学者 我给出了两种实现方式的代码 一个用固定点迭代实现，可以容易变成c语言 另一个使用simulink 实现，可以加到控制图中作为一个子函数(the code is programmed following the classical paper of D.Jiles ,fellow of IEEE. The JA model is great and innovative work in magnetic material.)

matlab 代码，主要用于计算一数据矩阵的标准差，方差，变异系数，话三维曲面图(matlab code, data matrix used to calculate a standard deviation, variance, coefficient of variation, then D surface chart)

神经网络理论与Matlab R2007实现 源代码(The source code of neural network theory in Matlab R2007)

Multiple instance metric learning automatically labeled bags of faces

基于马尔科夫随机场的过绿色模拟退火的分割方法程序，包含如何建立马尔科夫随机场。(Markov random field segmentation method for green program based on simulated annealing, including how to build the Markov random field.)

Matlab遗传算法整理，涉及GA算法。(Sorting out genetic algorithm.matlab.)