衬度系数的英文

contrast ratio

例句与用法

Abstract : 145 samples of eight plants were collected from lanmuchang and yangjiawan and quantitative analyses were made of the ore - forming elements in the plant ashes . considering the three principles of the plant indicator for mineral exploration , namely certainty , sensitivity and feasibility , this paper evaluates comprehensively the indicating functions of the eight plants , on the basis of some quantitative indexes such as the relation coefficient between plant ash and ore - forming element , concentration coefficient , etc . it also discusses the relationships between the anomaly of plant ashes and the fault zone , alteration zone mineralization zone and orebody , showing the significance of these plants to the prospecting
文摘:在滥木厂和杨家湾铊(汞)矿床(点)对芒箕、南烛、榔榆、大金发藓、蜈蚣草、石松、黄花草、醉鱼草等8种植物取样145件，在提出确定找矿有效指示植物三原则(确定性，敏感性，可行性)的基础上，依据植物灰分与底质成矿元素相关系数、植物灰分富集系数和衬度系数，较全面地分析和评价了8种植物的找矿功能；讨论了其异常的分布与断裂带、蚀变带、矿化带以及工业矿化(矿体)之间的关系，并指出了其找矿意义。