The nonlinear equation of the guyed mast is presented based on calculation models of space cable and beam elements.

将桅杆结构离散为空间纤绳单元和梁单元计算模型，建立了桅杆结构非线性平衡方程。

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This is a big change from earlier models where NASA led and controlled the development of space vehicles.

VOA: special.2010.04.28

And there are plenty of variations on the theme: A version of the Levitron called "Floating Ideas" gives you a base over which you can float a variety of objects, including models of the space shuttle, a VW Beetle and a picture frame.

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She left the car in one fluid motion, not even pausing to push the locking button on her security key, and entered the school and walked urgently down the hall, past the display of photographs of "Astronaut Moms and Dads" grinning in their orange pressure suits as they held up models of the space shuttle.

NPR: In 'Challenger Park,' Mom Is an Astronaut

All models have increased boot space because of the relocation of the charging point and an enhanced interior trim.

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