The index works by taking a weighted average of the price of imported iron and domestically produced iron ore to produce a composite number.
这种指数通过对进口铁和国产铁矿石取以加权平均价格以此产生一个合成数。
Moreover, the ratio between the number of records and the number of index keys indicates, on average, the number of RIDs associated with each index key.
而且，记录的数量与索引键之间的比例说明，通常，RID 的数量与每个索引键都有关联。
The structure of the index tree decides the average index number to be visited, but even regarding the same index structure, the average visit time is different if the broadcast sequence is different.
索引树的结构决定了平均访问索引节点的数目，但是即使对于相同的索引结构，如果采用不同的广播序列，则平均访问时间也不尽相同。
Several targets, such as patch number, average patch area, form index of patch, fragmentation index, sub-dimension, heterogeneity index of landscape and homogeneity index of landscape were studied.
选取了斑块数、平均斑块面积、斑块形状指数、破碎化指数、分维数、景观异质性指数和景观均匀度指数等指标进行研究分析。
The average root number per day multiplied by smoking years of smoking, that is, smoking index.
将平均每天的吸烟根数乘以吸烟年份，即是吸烟指数。
Average boundary length and patch shape index have a multiple impact which can make the patch area and boundary number a very good linear relation during the expanding and contracting process.
斑块面积增减过程中形状特征和平均边界长度的复合变化影响导致大型城镇和农业斑块面积和边界数量之间呈简单的线性关系。
Taking a mine as an example, CCA is made with the average casualty number per month and The Times of gas overrunning per month as the risk index respectively.
以样本矿井为例，分别以月平均受伤人数、月平均计划外瓦斯超限次数为风险评价指标进行控制图分析。
Taking a mine as an example, CCA is made with the average casualty number per month and The Times of gas overrunning per month as the risk index respectively.
以样本矿井为例，分别以月平均受伤人数、月平均计划外瓦斯超限次数为风险评价指标进行控制图分析。
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