BruteSearch120909

矩形窗、汉宁窗的函数源代码，用于查看其时域和频域波形；求过零率的函数以及其源代码(Rectangular window, Hanning window function of the source code for the view of its time-domain and frequency-domain waveform seeking function of the rate of zero, and its source code)

the binary knapsack problem in matlab

this code is used for processing all the directory

这是我另一个同学的关于图像处理与机器学习的作业，对四组图像提取特征值，进行分类识别。LIBSVM.文件里包含代码，及一些参数调试。(This is another of my classmates on image processing and machine learning operations on four sets of image feature extraction values ​ ​ for classification. LIBSVM. File contains the code, and some parameters debugging.)

matlab编写的截图小程序，适合参考学习(matlab prepared screenshot applet for reference study)

粒子群算法的局部模型程序，比全局模型的效果要好，尽管收敛速度慢些，但是都能找到最优点。(PSO partial model program than the overall model is better effect, despite the convergence speed more slowly, But can find the most advantages.)

此文件在matlab中，打开，运行可以玩超级玛丽哦，只不过没有敌人，但不过也挺有意思的(This file in matlab, open, running can play Super Mario Oh, but there is no enemy, but also very interesting)

matlab code for fisher

说明：  <声学海洋学原理>国外经典书籍，学习水声原理和海洋学必读(&lt Acoustic Oceanographic principle&gt of foreign classics, learning theory and oceanographic acoustic Required)

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.