Freight volume distribution and traffic assignment are two key problems in transportation planning. However, the existing models have some defects.
运量分布与交通分配是交通规划中的两个关键问题，但现有模型在我国城市交通规划的实际应用中存在不少问题。
It is indicated that volume distribution should be selected in shielding temporary plugging technique, and the density of material should be considered.
指出实施屏蔽暂堵技术时宜选用体积分布图，选择屏蔽暂堵剂时须考虑物质的密度。
Objective: To study the changes and the clinical significance of the Red blood cell volume distribution width (RDW) and the mean corpuscular volume (MCV) in patients with malignant.
目的：探讨恶性肿瘤患者红细胞体积分布宽度(RDW)和红细胞平均体积(MCV)的变化及其临床意义。
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