Silt Density Index 淤泥浓度指数 ; 污染密度指数 ; 指数
population density index 人口稠密指数
sludge density index 污泥密度指数 ; 淤泥浓度指数
electron density index 电子密度指数
stand density index [林] 林分密度指数 ; 林分密度指标
Visitor Density Index 游客密度指数
relative density index 相对密度指数
density index of resources 资源密度指数
comparative density index 人口密度比较指标
Stand density index (SDI) was applied as a quantitative index to measure mean crowd degree between trees.
选择林分密度指数(SDI)作为反映林分中林木之间平均拥挤指标。
The urban air quality was graded and density index of environment quality was calculated to obtain corresponding assessment results.
同时，对阜新市大气环境质量进行了评价，计算出阜新市环境质量浓度指数并得到相应的评价结果。
Repameterizing the average tree height growth model improved the fitting results a lot by introducing site index and density index variables.
引入地位指数和密度指数可大幅提高林龄单因变量平均高生长模型的拟合度。
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