The rule graph of cloud layer and shadow was generated by the detection of cloud layer and shadow using support vector machine and information of solar Angle.

该方法利用支持向量机以及太阳角度信息，进行云层和阴影的检测，生成云层和阴影的规则图。

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Scientists working on an ash cloud detection system believe that airlines will soon be able to do just that.

BBC: Flying through volcanic ash clouds

Thus, boost-phase interception requires very prompt detection of a missile launch -- which adverse cloud and weather conditions can make difficult or impossible.

CENTERFORSECURITYPOLICY: Multilateral madness