1) classification review about cover caving ability
可放性分级评价
1.
Then it states a few ways of the classification review about cover caving ability.
论述了综放开采的顶煤破碎机理、变形破碎及回收规律；分析了影响煤层可放性的因素；介绍了煤层可放性分级评价的几种方
2) classification evaluation
分级评价
1.
The classification evaluation in desertification ground resource can direct reflected its distributing characteristic, production diversification and potential and soil fertility, so opinion method and level is very important.
沙地资源的分级分类直接反映其分布特点、生产适宜性乃至土壤肥力和生产潜力状况等,因此其分级评价的方法和水平至关重要。
2.
This paper analyzes and researches the existent classification evaluation model,then a new classification evaluation model of statistic data——the classification evaluation model of multiattribute decision-making is put forward,based on mathematical statistic and decision-making theoretics,choosing the classification precision,the quantity of information and classifica.
通过对已有的专题数据分级评价模型进行分析研究,运用数理统计和决策理论,提出一种新的统计数据分级评价模型——多属性决策分级评价模型,即首先,以常用的分级数学模型作为决策方案;然后,选取分级精度、信息量、分级间隔作为方案的属性,用熵法确定各个属性的权重;最后,提出多属性决策分级评价模型,并通过建立的试验系统,进行数据实验。
3) classified evaluation
分级评价
1.
In the last part, auchors discuss a synthetical classified evaluation of the cultivated land resources in Changqing county.
建立耕地资源分级评价的指标体系。
5) PG specification evaluation
PG分级评价
6) evaluation of discharge
疏放性评价
补充资料：地下水水资源评价(见水资源评价)
地下水水资源评价(见水资源评价)
d ixiashui shuiziyuan Ping】ia地下水水资源评价见水资源评价。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条