Grey target theory is grey relational theory of dealing with the lists of mode and its core concept is approaching degree. According to it, we can classify the modes.

灰靶理论是处理模式序列的灰关联分析理论，其核心概念是靶心度，可以依据靶心度进行模式分级。

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According to the theory of grey target contribution degree, a method of solving weights is proposed with the formula of solving weights derived.

以灰靶贡献度理论为依据，以武器系统的效能评定为例，创立了一套权重的求解方法，并给出了求解公式。

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A new and improved edge detection algorithm is developed based on grey theory and grey relational analysis (GRA), which applies to the target recognition of the infrared imaging missile.

提出了一种用于红外成像导弹的改进型边缘检测算法，该算法基于灰色系统理论中的灰关联分析方法。

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