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- Based on the technical and economical index, an optimal decision for the cutoff grade of ore drawing is presented. 在获取矿石技术经济指标的基础上，对截止放矿品位进行了优选政策。
- It is proved that in an unique metal price fluctuating situation,a mine may introduce a very different strategy to control its cutoff grade inunderground selective mining. 理论分析和实例验证表明，选别式开采地下金属矿在完全相同的市场价格形势下，可能采取截然不同的边界品位控制策略。
- Taking maximum net present value as an optimum target and considering factors in mining, milling and metallurgy, a dynamic optimum method for optimizing cutoff grade of underground orebody is given. 摘要以净现值最大为优化目标，同时考虑采、选、冶三阶段因素，给出了地下开采矿体边界品位动态优化的方法。
- According to this cutoff grade, the paper has calculated the ratio of ore and rock while cutoff drawing that provide science foundation for the drawing of Xiaoguanzhuang iron mine. 据此计算了截止放矿时的矿岩比,为小官庄矿放矿提供了科学依据。
- For this,a optimization model for cutoff grades which are related to the whole metal produ... 在此情况下，金属露天矿存在着如何有效控制开采边界品位，以争取最大经济效益问题。
- ON THE FLUCTUATION OF MINERAL PRODUCT AND CUTOFF GRADE OF MINING 论矿产品价格波动与采矿边际品位的调整
- Optimization of Cutoff Grade Based on Maximum NPV Method 利用最大现值法优化边界品位
- Optimization of Open-pit Cutoff Grade Based on Control Theory 基于控制理论的露天矿边际品位最优化
- Ore Quantity Calculation with a Definite Cutoff Grade 一定边界品位的矿量计算
- STUDY ON CUTOFF GRADE IN A FOREIGN UNDERGROUND COPPER MINE 国外某地下铜矿边界品位的研究
- Method for Determining Cutoff Grade of Underground Orebody 地下开采矿体边界品位的确定方法
- Pupils who pass the test will be promoted to the next higher grade. 小学生只要考试及格就会升到高年级。
- Grade cutoff is sharp within inches. 数英寸内的品位变化很急剧。
- He's not in the first grade as a musician. 他不是第一流的音乐家。
- Optimization of open-pit cutoff grade based on option pricing theory 基于实物期权理论的露天矿边际品位最优化
- Business is now on the up grade. 目前生意蒸蒸日上。
- Pupils with 90% or more are awarded Grade A. 满90分的学生评为甲等。
- The sixth grade saw an educational film yesterday. 六年级学生昨天看了一部教育片。
- He received a failing grade on the term paper. 他的期末报告不及格。
- Red and yellow grade into orange. 红与黄混合成橘黄。
