After partition the pipe into calculation cells, the sound velocity, fuel density, fuel pressure and flowing velocity at every calculation crunode in different time are gained.

在对油管合理地划分计算单元后，可求解得到油管各个结点在不同时刻的燃油音速、密度、压力和流速等特征参数值。

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The paper based on the researching of these methods, combining with the excellence of the grid and density methods, applying the adapter gird to grid partition.

本文在研究上述两类算法的基础上，结合网格和密度算法的优点，把自适应网格技术应用到网格划分上。

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The amyloplast usually possessed a larger, very low electron density starch grain which mainly was long shuttle and there were some higher electron density partition or wedge structure in it.

它的基质很少，多含有呈长梭形的、电子密度非常低的淀粉粒，并有一些电子密度较高的条带结构。

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