Based on the reduction of attribute sets, the partial order relation matrix of radar jamming space is obtained.

在计算属性约简集的基础上，建立了雷达干扰空间的偏序关系矩阵。

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The evolvement of echo during the formation of hail storm and the relation of echo intensity with its height are analyzed by use of echo data. of the 711 rain radar.

本文用711测雨雷达实测的冰雹云过程回波资料，分析了大小回波在雹暴形成中的演变过程以及回波强度和回波高度间的关系。

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Best frequency relation is given between IF coherent oscillating source and clock frequency of full coherent radar.

给出了全相参雷达频率源的中频相干振荡源及时钟频率之间的最佳频率关系。

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The Patriot missile homes on an electronic signal "painted" on the target by the radar, and relays its position in relation to the target back to the radar and on to the control centre.

BBC: Fact file: Patriot missile defence

These systems use camera images or near-range radar to determine the direction and position of the vehicle in relation to lane markings.

ECONOMIST: Motoring