Lecture D32: Damped Free Vibration Spring-Dashpot-Mass System k Spring Force Fs =-kx, k>0 Dashpot Fd =-cx, c>0 Newton's Second Law (mx =EF) mx +cx+kx (Define)Natural Frequency wn=k/m,and

1已知矩形截面梁,某截面上的剪力Fs=120kN及弯矩M=10kNm绘出表示1

Linux File System 一、文件系统 二、VFS 三、VFS的作用 四、基于FS的文件访问 五 、VFS重要数据结构 六、文件系统的注册与安装

ZLG/F文件系统简要说明 1概述 1.1ZLg/s简介 ZLG/FS是广州周立功单片机发展有限公司发的面向嵌入式系统开发的小型文件系统,是ZLG系列中间件的重要成员之一。它是与FAT12、FAT16、FAT32高度兼容的文件系统,可以直接与个人电脑交换文件。它是可移植的、可固化的文件系统,可以用于前后台系统,也可用于多任务环境

Fast response(tdon 3 FS, doff <6 Hs) Precise timing(Atdoff 800 ns) Patented free floating silicon technology Optimized low on-state and switching losses Very high EMI immunity Cosmic radiation withstand rating

Direct fiber optic controll and status Fast response(tdon 3 FS, doff <6 Hs) Precise timing Patented free-floating silicon technology High reliability Very high EMI immunity

Why one needs statistics for describing physical phenomena? Any measurable macroscopic property is an average over a very huge number of microscopic configurations. Time scale of thermal fluctuations and basic relaxations~fs(femto second, 10-15 second). During the time interval necessary for realizing a measurement, a macroscopic system undergoes the change of its microscopic configuration for many many times!