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1)  critical density of dynamic frication
动摩擦临界浓度
2)  threshold friction velocity
临界摩擦速度
1.
The threshold friction velocity of oasis surface is greater than that of Gobi surface at natural condition, and the vertical dust flux of oasis surface is nearly 10 times smaller than that of Gobi surface because of the difference of the land-surface characteristics such as particle size distribution, plant vegetation and surface soil moisture content and so on, but whe.
研究表明,在自然状态下,由于地表土壤的粒子尺度分布特征、植被覆盖度及地表土壤水分含量等下垫面特征不同,绿洲地表风蚀起沙的临界摩擦速度要大于戈壁地表,其垂直尘粒通量(风蚀起沙率)比戈壁地表小将近一个数量级;但考虑人为的翻耕作用时,绿洲地表风蚀起沙的临界摩擦速度可能会减小一半以上,其垂直尘粒通量也将增加大约一个数量级,甚至比戈壁地表还要大。
2.
The dust particle concentration data measured by Wide Range Particle Spectrometer and the data observed at a 20 m meteorological tower were used to calculate the dust emission rate,friction velocity and threshold friction velocity over Zhurihe area,Inner Mongolia.
通过宽范围颗粒谱仪WPS以及20 m梯度塔获得的观测资料,计算了朱日和地区沙尘天气下的起沙通量、摩擦速度以及临界摩擦速度,得到以下结论:①起沙通量大小与沙尘天气的强度呈一定的相关关系,随着沙尘天气强度的增大,起沙通量大小也增大。
3)  Critical friction temperature
临界摩擦温度
4)  critical friction angle
临界摩擦角
5)  Critical concentration
临界浓度
1.
The effects of electrolyte (different types and different ion strength) on critical concentration (C *) of the chitosan and N alkyl chitosan liquid crystalline in formic acid solutions were studied.
研究了壳聚糖以及N 烷基壳聚糖的甲酸浓溶液中添加不同类型、不同离子强度的小分子电解质时溶致液晶临界浓度 (C )的变化规律。
2.
Critical concentration(c  )of the samples were measured by polar optical microscopy(POM).
结果表明:同一碳链长度时,取代度对临界浓度的影响不大;而当取代度相近时,随着碳链长度增加,临界浓度也随之增大。
6)  critical friction stress
临界摩擦应力
补充资料:动摩擦
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性质: 一物体沿着另一物体的表面运动时,在其接触面所产生的阻力。根据固体与固体的运动状态有滑动摩擦与滚动摩擦之分。

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