The weighted mean of the random variable is the expected value.
随机变量的加权平均值是期望值。
To conquer the influence of the cross term, a weighted mean method is proposed.
为了克服交叉项的影响，提出了加权平均的方法来改进算法。
When fusing several outputs of similar sensors, we often use the weighted mean method. The weight has great influence on the fusing result.
对多个同类传感器的输出数据进行融合时多采用加权平均法，权的分配对融合效果的影响十分明显。
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