Rotating shafts experience a an elliptical motion called whirl. It is important to decompose this motion into a forward and backward whil orbits. The current function makes use of two sensors to generate a bi-directional spectrogram. The method can be extended to any time-frequency distribution
％
％ compute the forward/backward Campbell/specgtrogram
％
％ INPUT:
％ y (n x 2) each column is measured from a different sensor
％ ///////
％ __
％ |s1| y(:,1)
％ |__|
％ __
％ / \ ________|/
％ | | | s2 |/ y(:,2)
％ \____/ --------|/
％
％ Fs Sampling frequnecy
％
％ OUTPUT:
％ B spectrogram/Campbel diagram
％ x x-axis coordinate vector (time or Speed)
％ y y-axis coordinate vector (frequency [Hz])
使用pso求最小化一函數
matlab程式碼，寫的非常簡潔(不到100行)，且還包括了2維的圖形展示，和大家分享參考!!!
一起學習matlab和各種optimize methods
最小化：(x-15)^2+(y-20)^2
The swarm matrix is
swarm(index, [location, velocity, best position, best value], [x, y components or the value component])
Author: Wesam ELSHAMY (wesamelshamy@yahoo.com) MSc Student, Electrical Enginering Dept., Faculty of Engineering Cairo University, Egypt
本書第二部分講述的是在Wi n 3 2平臺上的Wi n s o c k編程。對于眾多的基層網絡協議，
Wi n s o c k是訪問它們的首選接口。而且在每個Wi n 3 2平臺上，Wi n s o c k都以不同的形式存在著。
Wi n s o c k是網絡編程接口，而不是協議。它從U n i x平臺的B e r k e l e y（B S D）套接字方案借鑒了
許多東西，后者能訪問多種網絡協議。在Wi n 3 2環境中，Wi n s o c k接口最終成為一個真正的
“與協議無關”接口，尤其是在Winsock 2發布之后。
