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床面层
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  bed layer
     Based on the present definition of thickness of bed layer and the formula for equilibrium sediment concentration at it, this paper also gives a calculation method for suspended load transport, and this method gives a satisfactory accuracy in verification.
     基于本文建议的床面层高度及参考面平衡浓度公式,建立了悬移质输沙率计算方法,取得了满意的输沙率计算精度。
短句来源
  bed-surface layer
     Formula for bedload sediment transport rate based on energy balance relationship within bed-surface layer
     基于床面层能量平衡关系的推移质输沙率计算式
短句来源
     Based on the relationship between energy and flow within the bed-surface layer,a relationship between the bedload sediment transport rate and effective stream power within the bed-surface layer is derived.
     基于床面层内的水流能量关系,推导了推移质输沙率与床面层内有效水流功率的关系式.
短句来源
     The measured data show that the bedload sediment transport rate is related more closely to the effective stream power within the bed-surface layer than to the river stream power.
     实测资料表明,推移质输沙率与床面层内有效水流功率有良好的相关性,且高于推移质输沙率与水流功率的相关性.
短句来源
  “床面层”译为未确定词的双语例句
     According to the stochastic\|mechanistic properties of solid phase\|bedload, a differential equation governing the motion of bedload is strictly developed by an analogous approach to derive the Boltzmann equation in the kinetic theory of molecules. The collision term in the equation is involved mainly with the effect of collision between particles in the bedload layer and particles on the bed\|surface.
     本文针对固相推移质具有的随机和力学双重特性 ,通过类似分子运动论中 Boltzmann方程的推导方法 ,建立起推移质运动的控制微分方程 ,其中碰撞项主要考虑推移层颗粒与床面层颗粒的碰撞效应 .
短句来源
  相似匹配句对
     Sediment concentration distribution in saltating layer near the bed of open channel flow
     明渠湍流床面附近跃移内颗粒浓度垂线分布
短句来源
     1. UI layer.
     1.用户界面
短句来源
     (3) syllablic tier;
     (3)音节;
短句来源
     Formula for bedload sediment transport rate based on energy balance relationship within bed-surface layer
     基于床面能量平衡关系的推移质输沙率计算式
短句来源
     THE BED SHEAR STRESS DISTRIBUTION CHANNEL BENDS
     弯道床面剪切力的分布
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  bed layer
The results of experimental study are presented and mathematical models are proposed for heat and mass-transfer coefficients in a packed bed layer of reacting particles immersed in a liquid through which the reaction products are bubbled.
      
The results of experimental study are presented and mathematical models are proposed for heatand mass-transfer coefficients in a packed bed layer of reacting particles immersed in a liquid through which the reaction products are bubbled.
      
This paper briefly introduces the development of vibrating fluidized bed at home and abroad, elaborates the vibration properties of vibrating fluidized bed, the fluidizing velocity and pressure drop of the bed layer.
      
With few exceptions, PCs lie atop an astrocytic bed layer and glial processes are apposed to the various aspects of the PC body left free by the afferent axons.
      
At these times, SPM concentrations in a thin, near-bed layer were >amp;gt;60 g I-1 in the turbidity maximum region of the Ouse and >amp;gt;30 g 1-1 in the upper Humber (where channel volumes were much greater).
      
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In this paper two dimensional turbulence time averaged structure in open channel and vertical distribution of suspended sediment concentration are studied. The results show that the turbulence diffusion coefficient is increased from the bed to the water surface, and reaches the maximum at the water surface. The distribution of suspended sediment obtained is similar to the distribution of vertical turbulence intensity measured in practice...

In this paper two dimensional turbulence time averaged structure in open channel and vertical distribution of suspended sediment concentration are studied. The results show that the turbulence diffusion coefficient is increased from the bed to the water surface, and reaches the maximum at the water surface. The distribution of suspended sediment obtained is similar to the distribution of vertical turbulence intensity measured in practice in recent years. The maximum value is located near the bed layer, and decreases to zero quickly to the bed surface . It decreases from the bed layer to the water surface, but is not equal to zero at the water surface. The vertical suspension index is a variable.

初步探讨了二元明渠紊流扩散的时均结构和悬移质含沙量的垂线分布规律.研究结果表明,紊流垂向扩散系数的分布规律自边界附近向水面逐渐增大,在水面附近达到最大值;建立的含沙量垂线分布与近年来实测得到的水流脉动强度的垂线分布规律相同,即最大值位于临底附近,由此向水面附近逐渐衰减但不等于零,向床面层快速衰减趋向于零;悬浮指标在垂线上是一个变量.

In this paper,the movement states of particles on the surface layer of river bed including at rest,in bed load transport and in suspension and their critical conditions for transform are described.The probabilities of four states consisting of probabilities of four basic transforms and four states are presented.The probabilities of four basic transforms are calculated and their characteristics are analyzed according to the numerical results.As a result,the of probabilities of states are obtained and used to...

In this paper,the movement states of particles on the surface layer of river bed including at rest,in bed load transport and in suspension and their critical conditions for transform are described.The probabilities of four states consisting of probabilities of four basic transforms and four states are presented.The probabilities of four basic transforms are calculated and their characteristics are analyzed according to the numerical results.As a result,the of probabilities of states are obtained and used to deduce the formula for calculate the ratio of bed load to suspended load.

本文首先论述了床面层泥沙静止、推移( 滚动与跳跃) 和悬浮三种运动状态及它们转移的临界条件,四种基本转移概率和由它们构成的九种状态转移概率. 接着利用数字计算结果, 给出了四种基本转移概率, 并分析了它们的特性. 在这个基础上计算了泥沙在床面层处于静止( 床沙) 、推移( 推移质) 、悬浮( 悬移质) 的状态概率. 最后作为状态概率的应用给出了推悬比的公式.

Based on the “saltation\|diffusion” concept for sand grain motion in air,an experimental study is carried out on the longitudinal profiles for sand falling flux after certain cross\|section.The profiles were found to be determined by three key parameters such as sand falling flux at reference cross\|section,averaged maximum saltation length for sand grains and the “saltaion\|diffusion” index.An approximated relation was used,which could describe the experimental results satisfactorily.Longitudinal flux profiles...

Based on the “saltation\|diffusion” concept for sand grain motion in air,an experimental study is carried out on the longitudinal profiles for sand falling flux after certain cross\|section.The profiles were found to be determined by three key parameters such as sand falling flux at reference cross\|section,averaged maximum saltation length for sand grains and the “saltaion\|diffusion” index.An approximated relation was used,which could describe the experimental results satisfactorily.Longitudinal flux profiles were measured by means of horizontal array trap for a variety of air flow velocities and sand grain sizes.It was found that the averaged maximum saltation length for sand grains increases with increasing airflow shear velocity and sand grain size,whilst “saltation\|diffusion” index varies in the reverse trend.

过去对挟沙气流水平集沙的实验研究较少。在 5种风速和 2种沙粒粒径条件下进行了风洞水平集沙实验 ,发现沙粒降落量的分布特征由参考点沙粒降落量、沙粒平均最大跃移长度和“跃移 扩散”指数三个参数共同决定。其中 ,沙粒平均最大跃移长度随气流摩阻速度和沙粒粒径的增大而增大 ,“跃移 扩散”指数则呈相反的变化趋势。挟沙气流水平集沙实验研究是传统的垂直集沙研究的有益补充 ,对理解近床面层区的集沙效率也有参考意义。

 
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