然后再对所有的期货商品，以持仓金额为权重，计算对于基期数据比值的加权算数平均值，得到指数值。
To get the index, we firstly compute the mathematic average for single commodity price, using price and trading volume of all contracts.
在检索中，颜色和纹理特征的权重不同，本文采用线性加权方式综合颜色特征相似距离和纹理特征相似距离，对图像进行检索。
In this paper, we using a kind of comprehensive image retrieval which fuses color and texture features by linear weights and discuss the method which the weights are determined.
在属性信息相关时采用加权组合方法，其中涉及的权重，既有信息量权重也有独立性权重。
In the case of correlative attributes, weights are used for evidence combination, which could be derived from information quantity or independence weight.
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