摘要:
This lecture provides the WLAN hardware engineer the essential knowledge of IEEE 802.11 a/b/g physical specification and the basic skill of how to do 阅读全文
摘要:
The world lost seven astronauts of Space Shuttle Columbia(哥伦比亚号航天飞机) this month. It broughthome the serious risk that 1humans face into the hostile en 阅读全文
摘要:
Just 33 minutes into the New Year, NASA's New Horizons probe made space exploration history, flying by the most distant body ever visited by a spacecr 阅读全文