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垂向
相关语句
  vertical direction
    2. A new double sigma coordinates is introduced to keep the virtues of sigma coordinate in the vertical direction.
    2.垂向引入双σ坐标的新型分层坐标系,推导了正交曲线坐标下基于双σ坐标的三维斜压流场及紊流闭合模型。
短句来源
    In the broad water area such as the coast, estuary, lake and large reservoir, the horizontal scale is far larger than the vertical scale, the variation of the hydraulic parameters (for instance, velocity) is smaller in the vertical direction than in the horizontal direction, and the flow field can be expressed as the average flowing value along the water depth, so the two-dimension plane numerical simulation technique of the water flow and water quality may be used in these areas.
    在海岸、河口、湖泊、大型水库等广阔水域地区,水平尺度远大于垂向尺度,水力参数(如流速等)在垂直方向变化要小于水平方向的变化,其流场可用沿水深的平均流动量来表示,可采用平面二维水流流场与水质数值模拟技术。
短句来源
    As for the reservoir of which the width to depth ratio is smaller, and the vertical variation of the parameters related such as the velocity, temperature and concentration is greater than their variation in the horizontal direction, the vertical two- dimension water flow model were set up, in which the water depth may change with the time and space, and when the coordinate transformation was made along the vertical direction, the variable area could be changedinto the regular one.
    对宽深比较小,有关参量(如流速、温度、浓度)的垂向变化比水平横向的变化为大的窄深型河谷水库等区域,建立垂向二维水流与水温数学模型。 垂向做叮变换将可变域变为规则区域,使计算精确拟合自由面与底部边界。
短句来源
    (8) The effects of distortion ratios on distribution of velocities and sediment concentrations in the vertical direction are analyzed.
    (8) 从理论上分析模型变率对流速和含沙量沿垂向分布的影响。
短句来源
    Thirdly, a new σ-z coordinate are designed to keep the virtues of a and z coordinates and minish their shortcomings. It adopts σ coordinate for current, z coordinate for temperature and salinity in the vertical direction, and Euler-Lagrange method is used to join the calculation of current, temperature and salinity.
    提出了垂向流场σ坐标、温盐z坐标的新型σ-z混合坐标,并采用Euler-Lagrange方法衔接σ坐标流场、z坐标温盐场的数值计算,它更好地结合了σ和z坐标的优点,减小了其缺点的影响;
短句来源
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  “垂向”译为未确定词的双语例句
    In the wave model test of deepwater platform, the deepwater mooring system will be truncated not only vertically, but also probably horizontally.
    在深水海洋平台的波浪水池模型试验中,深水系泊系统不仅需要被垂向截断,还可能被水平截断。
    Experimental study on fine sediment concentration under breaking waves
    破碎波作用下粉沙悬移质浓度垂向分布的实验研究
短句来源
    Turbulence structure in river flow through non-emergent vegetation
    含淹没植物的河流垂向紊动结构
    Research on equivalent design method of deepwater mooring system truncated vertically and horizontally
    基于垂向截断和水平截断的深水系泊系统等效设计研究
    2, Application of the modified k-e model by Munk-Anderson equation to gravity flow in reservoir shows that the modified model overestimates the turbulent intensity in reservoir.
    2.采用Munk-Anderson修正的κ-ε模型模拟水库重力下潜流,发现该修正模型过高地估计了水库的紊动强度,使垂向动量传递加大,流速误差明显增加。
短句来源
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  vertical direction
The horizontal trust region subproblem in the algorithm is only a general trust region subproblem while the vertical trust region subproblem is defined by a parameter size of the vertical direction subject only to an ellipsoidal constraint.
      
This method is different from classical algorithms in which the gray differential values of the mutual vertical direction are combined into one gradient value.
      
The stretching of a liquid sample, squeezed out in the vertical direction from an aperture of an arbitrary form, is investigated.
      
A study is made of the parametric excitation of internal waves in a continuously stratified liquid in a vessel executing oscillations in the vertical direction.
      
In [2, 3] the effect of high-frequency harmonic vibration in the vertical direction on the stability of this flow was investigated.
      
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This paper discusses the methodology used in sediment measurement in the Yellow River. Distribution of sediment in a vertical is analysed. Probable errors in adopting simplified methods such as sampling at 0.6 relative depth, 0.2-0.8 relative depth and 0.2-0.6-0.8 relative depth are deducted by means of Einstein method and verified by observed data.Typical transverse distribution of sediment concentration is also illustrated. It is shown that the grain size is a fundamental factor affecting the uniformity of...

This paper discusses the methodology used in sediment measurement in the Yellow River. Distribution of sediment in a vertical is analysed. Probable errors in adopting simplified methods such as sampling at 0.6 relative depth, 0.2-0.8 relative depth and 0.2-0.6-0.8 relative depth are deducted by means of Einstein method and verified by observed data.Typical transverse distribution of sediment concentration is also illustrated. It is shown that the grain size is a fundamental factor affecting the uniformity of sediment concentration both transversely and vertically. Since the sediment concentration varies appreciably during floods, large number of sampling and proper timing are indispensable to obtain reliable results. Comparisons of the amount of sediment deposition for a river reach between range method and the difference of inflow and outflow sediment loads are made by using long term records. Same trend of deviation for coarse grained sediment is found as the analysis made for the measurement of sediment discharge in a cross section.

本文讨论了黄河输沙率测验方法,分析了泥沙的垂向分布特点。应用爱因斯坦方法,计算了目前所采用的简化取样方法的误差,并用实测资料作了验证。本文也研究了横向含沙量的典型分布,提出泥沙粒径是影响含沙量的横向和垂向分布均匀性的主要因素。根据黄河多沙善变、洪峰期间含沙量变化剧烈的特点,为了获得可靠的含沙量测验成果,认为安排足够的取样次数和掌握合适的取样时机,是非常重要的。通过对三门峡水库及黄河下游一些河段的输沙率法与断面法实测冲淤量的对比分析,发现在现行输沙率测验中,主要是粗颗粒泥沙部分,存在着偏小的系统误差。

In the dam body with flow, the sustained capillary water transfers hydrostatic pressure not only in the vertical direction but also in the transverse direction. It forms a united flow field with the saturated water zone to perform transverse flow. Therefore, when we study the distribution of the stress in the dam body, we will consider both the action of pore water pressure and the action of flow drive force. If the hydrostatic pressure on both sides of the dam body is taken as the flow drive force (body force),the...

In the dam body with flow, the sustained capillary water transfers hydrostatic pressure not only in the vertical direction but also in the transverse direction. It forms a united flow field with the saturated water zone to perform transverse flow. Therefore, when we study the distribution of the stress in the dam body, we will consider both the action of pore water pressure and the action of flow drive force. If the hydrostatic pressure on both sides of the dam body is taken as the flow drive force (body force),the distribution of the latter will cover not only the saturation water zone under the soak curved surface but also the sustained capillary water zone above the soak curved surface; the action of the force at any point is directed to the same direction as the flow is.While the velocity of the transverse flow varies vertically and there are always high velocity zones,so is the flow drive force eveuly distributed.

在有渗流坝体中,支持毛细水在垂向与横向上都传递静水压力;它与饱水带构成统一的渗流场,一起进行着横向渗流。因此,对坝体应力分布的研究要同时考虑孔隙水压力和渗流驱动力的作用。如将坝体两坡的静水压力(面力)转做渗流驱动力(体力)时,则其分布范围不仅包括浸润曲面以下的饱水带,而且也包括支持毛细水带;在任一点的作用方向与流向相同。横向渗流速度在垂向上呈不等值分布,存在高速带,故渗流驱动力的大小也不是均布的。

The differential LDA system has been used to investigate the statistical characteristics of the turbulent boundary layer flow over a transitional rough flat plate. The characteristical quantities, such as turbulent intensity, third order moment, fourth order moment, probability distribution, auto-correlation and power spectrum, have been obtained. The experimental results expressed that the turbulent boundary layer can be divided into subregions in the vertical direction according to the sign of higher order...

The differential LDA system has been used to investigate the statistical characteristics of the turbulent boundary layer flow over a transitional rough flat plate. The characteristical quantities, such as turbulent intensity, third order moment, fourth order moment, probability distribution, auto-correlation and power spectrum, have been obtained. The experimental results expressed that the turbulent boundary layer can be divided into subregions in the vertical direction according to the sign of higher order momentum, and the limits of divisions have been given. Meanwhile, it was found that the turbulent boundary layer flow tends to be homogeneous and isotropic owing to the roughness of the flat plate, i.e., the distribution of probability density is close to Gussian distribution.

本文应用偏振差动式激光测速仪对过渡粗糙平板紊流边界层的统计特性进行了研究,得到紊动强度、紊动流速的三阶矩、四阶矩、概率密度分布形式、功率谱、自相关系数等特征。分析结果表明,可以根据高阶矩的符号对紊流边界层沿垂向进行分区,并给出了分区标准,同时发现,加糙可使边界层紊流趋于均匀和各向同性,即概率密度分布更接近于高斯分布。

 
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