threshold velocity

In this paper, the formula of calculating threshold velocity of non uniform sediment is established in consideration of their relative degree of expose, and the additional mass force, etc.

通过对附加质量力的概念及表达式和相对暴露度参数的引入，推得了非均匀沙起动公式。

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Under the same destruction percentage moss crust has the highest threshold velocity, followed by lichen crust, algal and algal-lichen crusts in succession.

相同破损率条件下，起动风速以苔藓结皮最大、地衣结皮次之、藻结皮和藻类地衣结皮最小。

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The threshold velocity of sand is influenced by many factors in coastal zone, but the grain diameter and moisture content of sand grain are the dominant factors.

在海岸带，沙粒粒径和水分含量是决定沙粒起动风速的最主要因素。

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Compared with conventional moldboard plough practice, the conservation tillage with 30 cm height stubble could remarkably increase threshold velocity and reduce the soil loss by about 3/ 4.

保护性耕作可明显地提高起沙风速，减少农田土壤损失，当秸秆高度为30cm时，风蚀量仅为传统耕地的1/4左右。

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The obtained safety threshold velocity by the new method is in good agreement with the measurement.

分析结果表明，新方法确定的安全阈值与现场监测确定的阈值吻合得较好。

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Experimental Investigation for Normal Impact on Single Bumper Shield at First Threshold Velocity Range

第一门槛值区间单防护屏防护正撞击实验研究

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To prevent from damaging pore structure and reduce the oil recovery cost in waterflooding, the flowing velocity of injected fluid should be below the threshold velocity of rocks.

分析认为，在油田注水开发时，为防止伤害孔隙结构导致降低开发效果，应将注水速率控制在储集层岩石临界速率以内。

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The results show: after a training period, the athletes have the relative values of maximal oxygen uptake increased significantly, anaerobic threshold velocity increased very significantly;

结果显示：经过一个训练周期，运动员的最大摄氧量相对值具有显著性提高，无氧阈速度具有非常显著性提高；

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Effects of moisture on threshold velocity of coal dust

水分对港口煤炭粉尘起动风速的影响研究

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Analysis of the effects of sand moisture on the threshold wind velocity

沙土含水率对起沙临界风速影响

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Research On Uninjurous Test About Anaerobic Threshold Velocity of Swimmer Athletes

游泳运动员无氧阈游速的无损伤测试研究

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When the axial velocity of the electron stream is equal to the threshold velocity, the angular velocities of two electron stream are equal, and the electrostatic wave is stable.

当轴向速度等于临界值时，两个电子流旋转速度相等，电子静电波是稳定的。

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According to the micro-aggregates size distribution parameter 、 roughness length from the simulation of ground situation threshold friction velocity and friction wind speed;

由表土微团粒粒度分布参数、地表状况等模拟粗糙度、起动摩阻风速和摩阻风速；

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The threshold velocity between benign and malignant masses is 12cm/ s.

良恶性肿瘤之间的临界流速值为12cm／s。

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The widely accepted Bagnold type function to calculate threshold wind velocity or shear velocity was developed for dry sands.

在土壤风蚀研究中，Bagnold建立的干沙子的起动风速与沙粒粒径关系的表达式已被广泛接受。

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The result indicated that threshold wind velocity of soil erosion is non-linearly and positively related to shrub coverage;

结果表明：临界侵蚀风速与灌木林盖度之间为非线性正相关关系；风速廓线受灌木林盖度的影响显著；

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Experimental report on the threshold velocity of Oncomelania hupensis

钉螺起动流速的实验报告

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Theoretical Estimation of Threshold Velocity of Blasting Vibration for Rock Slope

岩质边坡爆破振动速度阈值的理论估算

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The Effects of Magnus Force on Sand Flux and Energy and Threshold Wind Velocity to Non-uniform Sand by the Common Tangential Angle

Magnus力对风沙流结构与能量的影响和以公切角表征的非均匀沙起动风速

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Field Observation of Dust Threshold Friction Velocity on Different Types on Farmland Surfaces

不同类型农田地表粉尘起动摩阻风速的野外观测

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Experimental research on the threshold velocity of raw ore particles

矿料颗粒起动风速的实验

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A flume test is carried out on the threshold velocity for the coherent silt sampled in the sea area near the Cangnan power plant in Zhejiang Province.

结合浙江苍南电厂工程要求，在拟建航道处的试挖槽附近取样，对粘性淤泥的起动进行了室内水槽试验。

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Influence factors and mathematical model of coal dust particles threshold velocity

煤炭粉尘颗粒起动风速影响因素及数学模型

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On the Threshold Wind Velocity of Sand Movement on Sand Bed with Low Water Content

低含水率沙床的临界起沙风速

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Study on Threshold Velocity of Sand-Driving Wind of Different Soil Types in Nenjiang Sandy Land

嫩江沙地不同土壤质地类型起沙风速的研究

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Based on the flume experiment, the start velocity experiment data of Rongchang fine coal powder are fitted, and the threshold velocity formula is introduced also. It provided the foundation for the sediment velocity scale computation.

通过水槽试验，对荣昌精煤粉起动流速资料进行拟合处理，推导其起动流速公式，为泥沙模型试验泥沙起动流速比尺计算提供依据。

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Threshold velocity of quarry on a slope and stable slope of quarry mound

斜坡上块石的起动流速与抛石体的稳定坡度

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The experiment results show that the threshold velocity is affected by the ratio of roughness coefficient of ice cover and bed.

试验表明：冰盖下泥沙起动流速与冰盖及槽底糙率的相对比值有关。

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The Relation of the Threshold Velocity of Coal Dust to Its Size and Humidity

煤粉起动速度与粒径及湿度的关系

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The instantaneous moving mode of sand mass is divided into 4 types, namely: rolling, jumping, suspending, and running away, when the wind speed reaches the threshold velocity of sand-driving wind.

文章研究将沙粒在风速达到沙粒的起动风速时沙粒的瞬间起动方式分为4种，即：滚动、跳跃、悬浮和飞扬4种。

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