NASA's Space Shuttle launch videos are

NASA's Space Shuttle launch videos are

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送交者: 蟑脑丸于 2010-12-12, 13:14:19:

spectacularly incredible, incredibly spectacular

http://www.engadget.com/2010/12/12/nasas-space-shuttle-launch-videos-are-spectacularly-incredible/

feedback control for an inverted pendulum to keep it upright (无内容) - 短江学者 (0 bytes) 2010-12-12, 13:56:04 (525006)
- it is crucial and hard to keep it upright when the ties are released (无内容) - 短江学者 (0 bytes) 2010-12-12, 17:41:21 (525032)