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单宽
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  unit width
    Characteristics and Effect of Energy Dissipation of Water Flowin Large Unit Width Discharge of Stepped Spillway
    阶梯溢洪道大单宽流量的水流特性及消能效果
短句来源
    The Dachaoshan hydropower project has adopted the flaring pier stepped dam face and bucket combined energy dissipator in its design, and the prototype observation of overflowing hydraulics under the design water level was carried out in June, 2002. The streamwise pressure, bottom flow velocity and aeration over the 4 steps along the stepped dam face were measured, and the data on operations under a dam height of over 100m and a per unit width discharge of 165m3/s were obtained.
    大朝山水电站采用宽尾墩阶梯式坝面及戽式联合消能工的设计,于2002年6月进行了设计水位下的过流水力学原型观测,针对阶梯式坝面开展了沿程4个台阶上的压力、底流速和掺所的量测,取得了在100m级高坝、单宽流量165m3/s·m条件下的运行资料。
短句来源
    It was suggested that the maximum energy for unit width could be calculated by E=ρgΔHq.
    水闸消能防冲设计条件一般选用最大单宽能量E=ρgΔHq作为控制条件.
短句来源
    Study on river diversion and erosion control under condition of narrow river bed, large discharge per unit width, depth overburden layer
    狭窄河床大单宽流量深覆盖层施工导流消能防冲研究
短句来源
    Later, some experts and scholars concerned tried to perform study on comprehensive index to measure difficulty of river closure,, and advanced concepts of maximum flow energy in closure gap or maximum flow energy per unit width in closure gap and the relating formula was derived, which has been used to up now due to lack of examples of large-scale closure works, especially deep-water closure works, to verify it.
    其后,有关专家学者也试图进行截流难度的综合指标研究,并提出了最大龙口水流能量或最大龙口水流单宽能量的概念,导出了有关公式。
短句来源
更多       
  per unit width
    The Dachaoshan hydropower project has adopted the flaring pier stepped dam face and bucket combined energy dissipator in its design, and the prototype observation of overflowing hydraulics under the design water level was carried out in June, 2002. The streamwise pressure, bottom flow velocity and aeration over the 4 steps along the stepped dam face were measured, and the data on operations under a dam height of over 100m and a per unit width discharge of 165m3/s were obtained.
    大朝山水电站采用宽尾墩阶梯式坝面及戽式联合消能工的设计,于2002年6月进行了设计水位下的过流水力学原型观测,针对阶梯式坝面开展了沿程4个台阶上的压力、底流速和掺所的量测,取得了在100m级高坝、单宽流量165m3/s·m条件下的运行资料。
短句来源
    Study on river diversion and erosion control under condition of narrow river bed, large discharge per unit width, depth overburden layer
    狭窄河床大单宽流量深覆盖层施工导流消能防冲研究
短句来源
    Later, some experts and scholars concerned tried to perform study on comprehensive index to measure difficulty of river closure,, and advanced concepts of maximum flow energy in closure gap or maximum flow energy per unit width in closure gap and the relating formula was derived, which has been used to up now due to lack of examples of large-scale closure works, especially deep-water closure works, to verify it.
    其后,有关专家学者也试图进行截流难度的综合指标研究,并提出了最大龙口水流能量或最大龙口水流单宽能量的概念,导出了有关公式。
短句来源
    Studied discharge per unit width, film hole and Opening—Hole ratio, slope and Irrigation times of water, which affect water flow advance and regression process.
    研究了单宽流量、膜孔径、开孔率、地面坡度及灌水次数对水流推进及消退规律的影响,水流推进曲线符合幂函数规律;
短句来源
    According to many model experiments, the paper analyzed the relations between scour depth in turbid-water and discharge per unit width、sediment concentration、sand fraction and the impact of tailwater depth and sediment discharge on scour pit depth in details, discussed the variation relationships between the ratio of turbid-water to clear-water and Froude numbers, selected a suitable formula of turbid jet-trajectory distance.
    通过室内物理模型试验,详细分析了浑水挑流冲坑深度与单宽流量、含沙浓度、模型沙粒径的关系及尾水、输沙率对冲坑深度的影响,分析讨论了浑、清水冲深比与佛汝德数之间的变化关系,选用了较适合于本试验的浑水挑距计算公式。
短句来源
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  “单宽”译为未确定词的双语例句
    Selection of Energy Dissipators With large Unit Discharge
    大单宽流量消能工的选择
短句来源
    Research and Test for Energy Dissipation Form of Low Head,Large-unite Discharge Flood Discharging
    低水头、大单宽流量泄洪消能方式研究
短句来源
    2. Connecting to the need of certain engineering, a new form of energy dissipation, named Multi-Horizontal Submerged Jets, which based on the energy dissipation mechanism of spatial 3D hydraulic jump and multi-jets trajectory flowbucket, are put forward.
    2、结合工程实际需要,提出了基于空间三元水跃消能机理和挑流多股淹没射流消能机理的多股多层水平淹没射流消能形式。 多股多层水平淹没射流是将高流速、大单宽水流沿横向和垂向分成多股、多层射流,进入消力池水体的中部。
短句来源
    At the same time, we know that the distance and time of water flow advance of film hole irrigation accord with power function, t2=0.1564L1.2936.
    膜上灌水流推进距离与时间呈幂函数规律,即t_2=0.1564L~(1.2936); 膜上灌水流推进速度随单宽流量的增加而增加。
短句来源
    In such cases, 90% of the total leakage will be collected by the drainage ditches; the amount of leakage per unit length will be 0.2-0.3 m3 /day-m in slightly leaked sections and 0.59-0.78 m3/day·m in seriously leaked sections.
    此时90%以上的渗流量被截入沟,弱渗流段单宽渗漏量为0.20—0.30米~3/日·米,强渗流段为0.59—0.78米~3/日·米。
短句来源
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  unit width
Application of the maximum width of the grid and flow rate per unit width of the river results in the number of flow zones in the lateral direction of the river.
      
The peel strength is the first peak force per unit width of bondline required to produce progressive separation, and the peel energy is the amount of energy per unit bonding area associated with a crack opening.
      
Estimates of cross-reef mass transport per unit width ranged from 0.058 to 0.032?m2s?-1.
      
In the strip packing problem (a standard version of the two-dimensional cutting stock problem), the goal is to pack a given set of rectangles into a vertical strip of unit width so as to minimize the total height of the strip needed.
      
It is shown that any plane set of constant unit width contains a semi-circle of radius 1/2, and using this a minimal univeral plane cover is explicitly constructed.
      
更多          
  per unit width
Application of the maximum width of the grid and flow rate per unit width of the river results in the number of flow zones in the lateral direction of the river.
      
The peel strength is the first peak force per unit width of bondline required to produce progressive separation, and the peel energy is the amount of energy per unit bonding area associated with a crack opening.
      
Estimates of cross-reef mass transport per unit width ranged from 0.058 to 0.032?m2s?-1.
      
The intrinsic force per unit width, S, in thin films of Ag, Al, ZnS and LiF prepared by vacuum evaporation at pressures of less than 5×10-5 Torr, has been investigated using a sensitive bending plate technique with capacitative detection.
      
Measurement of contact angles for the flowing beads and for sessile drops led to the conclusion that the surface tension forces per unit width were similar for the drops on the two surfaces.
      
更多          


This paper is confined to a discussion of prevention of seepage from earth dams by means of blankets upstream which is considered to be a method for greater,quicker,better and more eco- nomical results.The following main problems are included: 1.Ideas of possibilities of piping through foundation soil and resistance of soil to percola- tion,and their effects on calculations of the lengths of blankets; 2.Calculations of economical and safe lengths of blankets and discharge of seepage; 3.Determination of the line...

This paper is confined to a discussion of prevention of seepage from earth dams by means of blankets upstream which is considered to be a method for greater,quicker,better and more eco- nomical results.The following main problems are included: 1.Ideas of possibilities of piping through foundation soil and resistance of soil to percola- tion,and their effects on calculations of the lengths of blankets; 2.Calculations of economical and safe lengths of blankets and discharge of seepage; 3.Determination of the line of saturation behind a inclined wall and the equipotential line below a blanket. The choice of the minimum blanket length depends in the main on the following conditions: 1.The seepage gradient through the dam foundation below the blanket jo is lower than or equal to the allowable gradient for the soil in the dam foundation(in consideration of no de- formation in seepage); 2.The discharge of seepage per unit width q is lower than or equal to the allowable design discharge (in consideration of storage and exploitation of water energy). Based on the subdivision principles of and the above-mentioned con- siderations,the following equations are derived.For the first condition,the blanket length is calculated from Equation(15);and that for the second condition,Equation(14). When the blanket length is known,the discharge of seepage can be calculated from Equa- tion (18). The blanket thickness is calculated by Equation(25). The 72 experiments made in the laboratory show that the formulas presented in the paper appear to be for the present more accurate than that of other scholars at home and abroad. The theoretical analysis and experiments may lead to the following important ideas regarding prevention of seepage by means of blankets: 2.The less the permeability of a blanket(k_0/k_n>5000)is,the greater its effect of seepage prevention will be,and vice versa; 2.Independent of the permeability of a blanket,there exists the idea of“effective blanket length”,i.e.,for a length larger than the effective length,the effect of seepage prevention of blanket is its permeability increases. 3.It is impossible for a blanket of stronger permeability(independent of length)to do as well as that of weaker permeability(with respect to discharge of seepage).Thus the weaker the permeability of blanket,the better and the value of k_0/K_n should be higher than 2000 at least.

本文指出土坝上游用铺盖防渗是一种符合多、快、好、省的方法.本文主要研究了下列问题:1.介绍基础土壤的管涌可能性及其所谓抗渗强度的概念,并讨论它们对设计铺盖长度的影响;2.讨论了经济安全的铺盖长度、厚度及渗流量计算;3.确定斜墙后浸润线的位置及铺盖下等势线的分布.选择最短铺盖长度,主要取决于下面两个条件:1.铺盖下坝基渗透坡降 j_0小于或等于坝基土壤的尤许坡降(以不发生渗透变形为原则);2.单宽渗流量小于或等于允许设计渗流量 (以蓄水水能利用为原则).根据巴夫洛夫斯基的分段法原理及上述原则得到下列计算公式.铺盖长度计算:表示第一个条件的计算公式为(15)式;表示第二个条件的为(14)式.给定了铺盖长度后,渗流量按(18)式计算.铺盖的厚度按(25)式计算.从72个试验资料证实本文所建议的计算公式在目前说来,较其他国内外学者的公式精度高.从理论和试验研究结果可得铺盖防渗的几点重要的概念:1.铺盖的透水性愈小(k_0/k_n≥5000)防渗的效用也就愈大,反之防渗的效用则很小.2.不管铺盖的透水性强与弱都存在着“有效铺盖长度”的概念,即铺盖的长度如大于有效铺盖长度时,它的防渗作用不显著.“有效铺盖长度...

本文指出土坝上游用铺盖防渗是一种符合多、快、好、省的方法.本文主要研究了下列问题:1.介绍基础土壤的管涌可能性及其所谓抗渗强度的概念,并讨论它们对设计铺盖长度的影响;2.讨论了经济安全的铺盖长度、厚度及渗流量计算;3.确定斜墙后浸润线的位置及铺盖下等势线的分布.选择最短铺盖长度,主要取决于下面两个条件:1.铺盖下坝基渗透坡降 j_0小于或等于坝基土壤的尤许坡降(以不发生渗透变形为原则);2.单宽渗流量小于或等于允许设计渗流量 (以蓄水水能利用为原则).根据巴夫洛夫斯基的分段法原理及上述原则得到下列计算公式.铺盖长度计算:表示第一个条件的计算公式为(15)式;表示第二个条件的为(14)式.给定了铺盖长度后,渗流量按(18)式计算.铺盖的厚度按(25)式计算.从72个试验资料证实本文所建议的计算公式在目前说来,较其他国内外学者的公式精度高.从理论和试验研究结果可得铺盖防渗的几点重要的概念:1.铺盖的透水性愈小(k_0/k_n≥5000)防渗的效用也就愈大,反之防渗的效用则很小.2.不管铺盖的透水性强与弱都存在着“有效铺盖长度”的概念,即铺盖的长度如大于有效铺盖长度时,它的防渗作用不显著.“有效铺盖长度”是随铺盖的透水性增加而减小.3.想用强透水性的铺盖防渗(不管铺盖怎样长),要达到弱透水性铺盖那样的效果是不可能的(指渗流量的大小而言),因此,铺盖的透水性愈小愈好,k_0/k_n 值最好至少大于2000.

~~

論文总結了近几年来苏联学者在研究冲填密实方面的工作,并进一步通过大量的試驗资料的分析整理,具体的考查了用均匀細砂进行水上冲填时,影响冲填密实度的因素,并用图表及公式建立了冲填密实度与其影响因素間的关系。实驗研究与分析工作証明了在冲填过程中对泥浆濃度及其单寬流量加以适当控制时,可以得到較高的冲填密实度,而无需进行使冲填造价变貴及冲填期限拖长的各种旨在加强均匀細砂冲填密实度的人工措施,这对提高冲填建筑物的質量及使冲填施工经济合理有重大意义。在研究过程中考查了現场条件下进行試驗的方法,探討了整理資料的方法,并将所得成果和苏联諸学者所得的成果作了比較,这对今后有关此間題的研究工作会有帮助。

Based on the hydrogeological data obtained from field investigation and exploration, a two dimensional seepage model has been established by using both the electric resistance network and FEM. More than one hundred sets of model tests and computation have been produced on two typical sections, one of them leaked seriously and another leaked slightly. The relationship between the depth of the drainage ditches, its distance from the embankment and the controlled water table has been provided. The field observation...

Based on the hydrogeological data obtained from field investigation and exploration, a two dimensional seepage model has been established by using both the electric resistance network and FEM. More than one hundred sets of model tests and computation have been produced on two typical sections, one of them leaked seriously and another leaked slightly. The relationship between the depth of the drainage ditches, its distance from the embankment and the controlled water table has been provided. The field observation and model tests have shown that controlling the ground water table by using the drainage ditches is one of the effective measures for preventing the ground at its downstream side from alkalization. The results obtained indicated that a distance of 150-200m between embankment and drainage ditches and controlled water level in ditches of 5.0-5.5m are more suitable. In such cases, 90% of the total leakage will be collected by the drainage ditches; the amount of leakage per unit length will be 0.2-0.3 m3 /day-m in slightly leaked sections and 0.59-0.78 m3/day·m in seriously leaked sections. It is 10-20 folds larger than that without ditches. These results provided a reference for designing the drainage ditches of projects with similar hydrogeological conditions.

该项研究工作是在调查研究、野外勘探和试验并取得有关水文地质参数的基础上,应用电阻网络模拟和有限元电算原理,建立了自洋淀二维渗流模型,取强、弱两个典型渗流段,经过百余组的试验和计算,提出沟深、沟距和控制水位的组合关系。为平原洼淀蓄水截渗排水工程规划设计提供了依据。实际观测与模型试验表明,千里堤截渗沟控制地下水位,防治周边土地盐碱化的作用是显著的。研究结果认为,以堤沟间距采用150—200米,截渗沟控制水位5.0—5.5米为宜。此时90%以上的渗流量被截入沟,弱渗流段单宽渗漏量为0.20—0.30米~3/日·米,强渗流段为0.59—0.78米~3/日·米。修截渗沟比不修截渗沟渗流量大10—20倍。这些数据可供水文地质条件类似地区设计截渗工程参考。

 
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