相对经济效益
相对经济效益-
模糊DEA方法及在相对经济效益评价中的应用
The Method of Fuzzy DEA and Application to the Appraisal of Relative Economic Efficiency
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现值指数反映了资金利用效果，内部收益率反映投资的相对经济效益，这两个指标通常作为辅助指标；
Both DPI shows the investment return and IRR reflect the relatively economic profit for investment are considered as the supplementary indexes .
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较小的裂缝穿透比只能获得较低的采油速度和采出程度，所获收益较小：但裂缝半径太大，压裂成本增加而增油量相对减小，经济效益并不好。
The low penetrate ratio can get low oil extraction velocity and low degree of reserve recovery , so it is low income ; but if the ratio is too high , the cost increase and oil increment decrease , economic benefit isn 't very well .