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The number π is a mathematical constant that is the ratio of a circle s circumference to its diameter and is approximately equal to 3.14159. It has been represented by the Greek letter "π" since the mid-18th century, though it is also sometimes romanized as "pi

说明：  基于LQR方法的风电机组变桨距控制的动态建模与仿真分析 模型搭建完成，功率跟踪效果良好(Dynamic modeling and simulation analysis of wind turbine pitch control based on LQR method The model is built and the power tracking effect is good)

其实popupwindow用起来比Dialog 方便，因为dialog一切都需要你自己来实现，而popupwindow帮我们实现了很多，我认为在使用的时候关键我们要看清参数： popupWindow.showAtLocation(parent, gravity, x, y) parent这个是一个父view试图， gravity 这个默认是居中，我们要指定显示方式：Gravity.LEFT | Gravity.TOP 最后两个参数就是显示的坐标位置，这样就可以根据需求自己定位显示位置了

MATLAB音频信号的分析与合成程序,希望对大家有帮助.(MATLAB Audio Signal Analysis and synthesis procedures, we hope to help.)

bilateral filter for image processing using matlab

c语言环境下用Welch平均法对信号 作功率谱估计(c language environment with Welch averaging method for power spectrum estimation of signals)

经典的灰度共生矩阵纹理计算方法，基于matlab平台实现(The classic method of calculating GLCM texture, based on matlab platform)

用于计算图象点灰度-区域灰度直方图的函数,用MATLAB语言实现.(used to calculate the gray image point-regional gray histogram function using MATLAB.)

用于大坝安全预警模型的多元回归以及变量分离的程序。也可以用于其他非线性回归(Dam safety warning model for multiple regression and variable separation procedures. Can also be used for other non-linear regression.)

时间序列实验 ARMA模型的EVIEWS操作(arma MODEL EVIEWS AND DOCUMENTS)