A mathematic model of spray wall-impingement was established based on discrete droplet model (DDM) considering the operating conditions of diesel engine.

基于离散液滴模型(DDM)，结合柴油机实际工作情况，建立了喷雾碰壁的数学模型。

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A method for interpolating digital depth model (DDM) considering uncertainty is proposed.

提出一种顾及不确定度的数字水深模型(DDM)内插方法。

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Bloomberg has a dividend discount model (DDM) model.

FORBES: Jim Cramer Was Right about Apple and I Was Wrong (Why I Think Apple is Worth $356)

Perhaps the simplest and most elegant valuation model used to price assets is the dividend discount model (DDM).

FORBES: Value Stocks and Dividends