1.231 6 m 119 10 ; s T T J T − ∆ − ∆ ⎛ ⎞ = × ⎜ ⎟ ∆ ⎝ ⎠ (1) 其中, J s 为瞬时 液流密度 ( sap flux density )(g H 2 O· 2 方法详述 m −2 ·s −1 ), 即单位时间通过单位边材面积的液流量; ∆T m 为昼夜最大温差; ∆T为瞬时温差.
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Each tree sap flow density had significant seasonal change.
各树种树干液流密度在生长季有明显的变化。
参考来源 - 东北东部山区主要树种树干液流动态及与环境因子关系·2,447,543篇论文数据，部分数据来源于NoteExpress
对树木液流密度在径向和方位上进行适当的整合，可较准确地计算整树和林段蒸腾。
A proper integration of both azimuthal and radial variations in SAP flux density within a tree can be scaled for whole-tree transpiration, which can relatively accurately estimate stand transpiration.
试验结果说明，镀锌层耐蚀性随镀液流速增大而提高，随电流密度增大而下降。
The results showed that the corrosion resistance of zinc electroplating increased with the increase in flow velocity of electrolyte, and decreased with the increase of current density.
其次，络筒机应据染缸的主泵扬程、液流量和外加压力的大小，调整不同纱支的卷绕密度。
Secondly, the packing density of wound yarn with different count should be adjusted according to the lift of main pump on dyeing kier, the flow of liquid and the pressure applied.
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