High velocity of flow channel in the bottom mat, mat extended length according to the cage height and maximum scour depth to determine.

流速大的河道应在最下部设置网垫，网垫伸出的长度根据网箱高度和最大冲刷深度来确定。

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This paper is based on the investigation of the fore people, makes use of 3s technologies, analyzes the bottom mat changed from the city expansion, which causes the fall of groundwater level.

本文就是在前人研究的基础上，利用了3s技术，从空间角度分析了城市扩展导致下垫面变化，从而引起地下水补给量的减少。

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A function expansion method as in Liu et al (2007) is used to formulate the mat-type VLFS floating on the wave surface over uneven sea bottom.

采用作者们（2007）提出的函数展开法描述箱式超大型浮体漂浮在不平底部海域中的水弹性响应问题。

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Even though it was the end of the summer and the path was dry, the stranger took the time to wipe his shoes carefully on the mat at the bottom of the steps.

NEWYORKER: Heirs