The net present value calculation is based on future cash flows. 凈現值計算基于未來(lái)的現金流。
The weights are calculated by information entropy indicating the availing value of data, and the problem of weight allocation is solved. 用信息熵所反映數據本身的效用值計算指標的權重，避免了權重分配困難的問(wèn)題。
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