However,some domestic scholars simply think it as a monotone decreasing concave function.
在投资项目的经济评价中,净现值是最常用的指标,而目前国内有些学者把常规投资项目净现值函数简单地认为是单调递减的凹函数。
In variable precision rough sets,there is no non-monotonic decreasing characteristics in quality of classification and relative positive-region and bounce phenomena maybe occur,so the process of reduction is not stabile.
阐明了变精度粗糙集模型中,经典粗糙集模型分类质量、相对正域、决策类下近似不再具有非单调递减特征,在约简过程中分类质量和相对正域会出现跳跃现象,约简过程具有不稳定性;但决策类下近似不会出现跳跃现象,可以得到稳定的约简过程;并且三者之间打破了在经典粗糙集模型中的等价性,需要针对三者分别建立模型,使属性约简变得多样化。
Applicability of grey model to the monotonic decreasing sequences and the estimate of parameters;
灰模型对单调递减序列的适应性与参数估计
The existence and uniqueness of a monotone decreasing positive solution of a third-order two-point boundary value problem;
三阶两点边值问题单调递减正解的存在惟一性