The weight matrix is replaced by using weight coefficient, and avoids calculating inverse matrix of the error variance matrix.
用计算加权系数的方法代替了原来的计算加权矩阵，从而避免了求解滤波误差方差阵的逆矩阵。
From engineering practice of multi-index estimation, this paper determines grey weight coefficient of estimation index according to grey statistical matrix.
本文从工程多指标评估实用出发，根据灰色统计矩阵确定表示评估指标重要程度的灰色权系数。
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