...示头发簇的大体形状，第二步把一个在广义圆柱横截面上定义的密度图沿着扫掠轴进行扫掠，生成体密度模型（volume density model），用来表示头发在簇内的分布。
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Single age variable stock volume growth model had low coefficient of determination, but it was improved a lot by introducing site index and stand density index in reparameterization.
林龄单因变量的蓄积量生长模型决定系数低，引入地位指数和密度指数再次参数化的生长模型可显著提高模型拟合度。
The effects of relative particle diameter and particle volume fraction on the packing density of particles mixtures were discussed by granule packing model.
采用颗粒堆积模型，讨论了矿物掺合料颗粒的相对粒径、体积含量对颗粒混合物体系堆积密实度的影响。
Based on the compaction model of sandstone mudstone alternating beds, we advance a new formula for formation grain density, which conforms to grain volume and mass balance law.
又称催化剂真密度。表示炼油工艺流化床催化剂密度的一种方式。它是扣除了催化剂颗粒内微孔体积后的实体密度。
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