"Smile Beijing" was sent into space by China's first lunar probe satellite Chang 'e-i, which sent back a signal of the song on December 4, 2007.

月球探测卫星“嫦娥一号”曾搭载《微笑北京》，并于07年12月4日从太空传回这首歌曲。

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The Real-Time Inverted Pendulum is used as a benchmark, to test the validity and the performance of the software underlying the state-space controller algorithm, i. e. the used operating system.

实时倒立摆被作为一个基准，去测试软件在状态空间控制器运算法则下的有效性和性能，也就是实用的操作系统。

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So, we employ an elasticity method, i. e. state space method, to analyze the simply-supported FGM beams, plates and cylindrical shells.

本文首先利用状态空间法结合三角级数展开技术，对简支的FGM梁、板、圆柱壳结构进行了弹性理论分析。

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