办事指南

Damaged bridges will cry for help before they fail

点击量:   时间:2019-03-07 12:13:02

By Sujata Gupta The catastrophic collapse of a highway crossing of the Mississippi river has spurred the development of sensor networks to make such structures safer I AM standing in a hallway at Acellent Technologies in Sunnyvale, California, golf ball in hand. Before me is a hard, black plastic panel. I hurl the ball and it hits the panel with a loud “thwack”. The computer on my left intones: