The width to width ratio of grid fin was an important parameter influencing the aerodynamics of grid fins.

格宽翼弦比是影响栅格翼气动特性的一个重要几何参数。

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In coastal areas, the ratio of policy processing expenses to the total cost in 2002 has increased from 16% to 33% in 2008 in grid construction.

在沿海地区，电网建设政策处理费用占总成本的比例已经由2002年的16%上升到2008年的33%。

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To enhance recall ratio and precision ratio of information retrieval, the paper designs the model of spam filtering based on semantic grid.

本文以增强语义信息，提高搜索的查全率和查准率为目标，设计了基于语义网格的垃圾邮件过滤模块。

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