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head     
相关语句
  头部
    Hydraulic Similarity Computation in Model of Separation of Liquid and Solid Particles by Water Intake Head with Inclined Boardings
    斜板取水头部液固分离模型相似水力计算
短句来源
    The water intake head installed with inclinefd boardings is called laminal sediment precipitation, which separates liquid and solid particles by gravity in two-phase flow.
    斜板取水头部能以重力分离液体中的固体颗粒,在河流中取水,则是一种自动除沙器。
短句来源
    The results show that, in such a flocculation pool, the flow field near the head of galleries has great influences on flocculation, and that the increase of the available space of the flocculation pool can improve the flow field in the pool.
    结果表明,絮凝池廊道头部流场对絮凝效果有很大影响. 为改善絮凝池的流场,可增大池内的有效空间.
短句来源
    It can be used not only to infer position of the magnetic body relative to the drill hole but also to make quantitative-semi-quantitative calculation and inverse interpretation and calculation of the distance and depth from head or tail of ore bodies to the known drill hole at surface by rotating an angle so as to design drilling depth,dip angle and orientation of the next drill hole.
    其作用不仅可以判断磁性体相对于钻孔的位置,而且可以进行定量和半定量计算,以及经旋转一角度采用地面方法作反演解释,计算矿体头部或尾部距已知钻孔的距离、深度,设计下一钻孔的深度、顶角、方位角。
短句来源
  
    The erosion sediment mainly comes from gully slope (gully head, gully bed, valley side ), Erosion modulus of valley is 1.28-2.48 times as that of the area between channels.
    侵蚀泥沙主要来源于沟谷坡地(沟、沟道和沟坡),沟谷地侵蚀模数是沟间地的1.28~2.48倍。
短句来源
    Based on this,the superposition principle of drop depth is used to gain the head field analytical relationship under the action of unsymmetrical well group.
    在此基础上,又利用井群工作时降深的叠加原理,进一步研究了非对称井群协同工作情况,获得了非对称井群共同作用下的水场解析关系.
短句来源
    Head Loss Coefficients of Throttled Surge Tanks with the LinkingPipe
    有连接管的调压室水损失系数研究
短句来源
    (3) Determined the control equation of the two dimensional tidal movement of the groundwater, according to the different boundary condition, established the finite solution equation of the two dimensional tidal movement, which concluded a quarter of quadrant model and half plane model, using Green function and separation of variables to solve the equation separately, and derived the function of water head in company with the time.
    (3) 推导地下水二维潮汐运动的控制方程,根据不同的边界条件建立四分之一象限和半平面地下水二维潮汐运动定解方程,对四分之一象限潮汐运动采用格林函数法求解定解方程,对半平面潮汐运动采用分离变量法求解定解方程,分别求出不同边界条件的地下水随时间的变化函数。
短句来源
    Near the head of the fish back and the fish bones, the velocity changes greatly with large velocity gradient.
    脊坝及刺坝坝处流速变化剧烈,形成较大的流速梯度;
短句来源
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  扬程
    Optimization by Numerical Calculation & Model Test for Straight Outlet in Pumping Station With Low Head
    低扬程泵站直管式出水流道优化设计计算及模型试验研究
短句来源
    Study on Hydraulic Characteristics of Tank-style Outlet Passage in Low Water Head Pumping Stations
    低扬程泵站箱涵式出水流道水力特性试验
短句来源
    It is high 5—10 percentage points at the head of vortex pump to compare the calculation and experiment ,high 5.2% under small flow operating condition and high more than 7.8% under large flow operating condition.
    本次计算得到的扬程与实验值相比,高出5~8个百分点,在小流量工况下高5.2%左右,大流量工况下高7.8%多些。
短句来源
    For large discharge and low lift head, it is especially suitable to use tubular pumps for their economic characteristics.
    贯流泵是适用于大流量、低扬程的一种经济泵型。
短句来源
    In this paper the relations among pump head, discharge and rotational speed are discussed and the characteristic value of pumping equipment system as well as the flow pattern in forebay are analyzed during the starting of pump station. On this basis, a method for calculating the water level depression of forebay is proposed.
    本文论证了水泵起动过程中扬程与流量、转速的关系,分析了泵装置系统的特征值与前池内的水流流态,在此基础上,推导出了水泵起动过程中前池水位降落值的计算方法.
短句来源
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  水头
    A Study on Configurations of Bottom Outlet with High Head
    高水头深泄水孔体型的研究
短句来源
    Model study on the head loss coefficient of two-stage flap valves
    双节拍门水头损失系数模型试验研究
短句来源
    Improvement of Control System for High head Hydraulic Test Stand
    高水头水力机械试验台控制系统的改进
短句来源
    Numerical Analysis of Utilizable Hydraulic Head for Downstream River Course at Wu Jia Jie Power Station
    吴家街电站下游河道可利用水头数值计算分析
短句来源
    A STUDY OF DIFFERENCE EVOLUTION IMAGE OF WATER HEAD GRADIENT VARIATION AND A PREDICTION METHOD FOR STRONG EARTHQUAKE RISK REGIONS
    水头梯度变差值演化图象及强地震危险区预测方法研究
短句来源
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      head
    EGFR is over-expressed in numerous tumors including, those derived from the brain, lung, bladder, head and neck.
          
    It is found that the head-on face (in contact with solution) of the films is green while the back face is white.
          
    Optimal approximation of head-related transfer function's pole-zero model based on genetic algorithm
          
    In the research on spatial hearing and virtual auditory space, it is important to effectively model the head-related transfer functions (HRTFs).
          
    In the research on spatial hearing and realization of virtual auditory space, it is important to effectively model the head-related transfer functions (HRTFs) or head-related impulse responses (HRIRs).
          
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    According to the basic equations derived under the two assumptions by Harold Lauffer—(1) the energy head of every point of a vertical section remains constant,(2) the flow lines are concentric circular arcs,this paper qives a comprehensive deduction of curvature effect in the characteristics of free overflow of round-crested spillway.118 runs of experiments of three round-crested spillway models of different size have been conducted by the author.The experimental results check the derived equations basically.Some...

    According to the basic equations derived under the two assumptions by Harold Lauffer—(1) the energy head of every point of a vertical section remains constant,(2) the flow lines are concentric circular arcs,this paper qives a comprehensive deduction of curvature effect in the characteristics of free overflow of round-crested spillway.118 runs of experiments of three round-crested spillway models of different size have been conducted by the author.The experimental results check the derived equations basically.Some empirical equations have been prepared to facilitate the application of experimental data.The discharge coefficients of free overflow of 27 different profiles of 16 practical spillways obtained by model tests have also been collected to verify the curvature effect equatiohs given by this paper Their practical agreement is also acquired.

    本文根据劳弗尔(H.Lauffer)氏在两项假定[(1)垂直测线上各点所含能量为常数,(2)流线呈同心圆弧]下所导得的基本公式,作了详细的补充引伸,得出圆顶壩自由溢流时各项水力特性中的曲率影响计算公式。作者曾进行了大、中、小三个圆顶壩模型的试验共118组,试验成果基本上和导得的计算公式相合致。文中并根据试验资料制定了一些经验公式,应用时可更简便。此外,也曾搜集了16个实用溢流壩包括27种断面曲线形式的流量系数模型试验资料,来验证流量系数所受的曲率影响,基本上也相符合。

    We are of the opinion that among the various small types of the low water-head power stations or electric power stations, the type with water wheel is most suitable for the present countryside of China. It is better than any type of water turbines, especially when water-head is less than 2 metres.Here we have analysed the head losses in middle-push water wheel, estimated their magnitudes, derived the similarity law of water wheel and pointed out that the kinetic energy flowing out from water...

    We are of the opinion that among the various small types of the low water-head power stations or electric power stations, the type with water wheel is most suitable for the present countryside of China. It is better than any type of water turbines, especially when water-head is less than 2 metres.Here we have analysed the head losses in middle-push water wheel, estimated their magnitudes, derived the similarity law of water wheel and pointed out that the kinetic energy flowing out from water wheel can be recovered by a well-designed open channel.

    目前农村低水头小型动力站及水电站可能用的水力机械有贯流式水輪机、立軸式水輪机及水輪三种型式。其中水輪的突出优点是簡单实用,一般人认为水輪的效率低,因此新建的小型电站和动力站都不再采用水輪。我們认为采取必要的改进措施后,它的效率可以大为提高,特别在微水头大流量的条件下,水輸的效率可能大于其他两种水輪机。因此在目前我国农村中,仍有意义。 水輸的流体动力損失主要是漏水,減小水轮与地面的間隙或采用防漏措施,便可大大減小漏水损失;其次是出口动能损失,采用本文所提出的利用渠道收回动能的办法,可減少这类损失;再其次是进口冲击損失,減小水貭点对于水輪的相对速度,便能減小这类损失;最后是水力摩阻损失,采取这些办法后,它的效率就大为提高。中冲式水輪的效率可高于75%,我們认为这个数字是現实的。

    The present investigation is concerned with the determination of pressure distribution along curved boundaries formed by circular arcs often found in hydraulic structures. The boundary geometry considered are: (1) Semi-infinite pier in closed conduit with head part formed by two circular arcs, (2) Isolated circular-arc irregularity on the wall of closed conduit. Analytical results. found by means of conformal transformation were compared with experimental data from wind tunnel and water tunnel tests, and...

    The present investigation is concerned with the determination of pressure distribution along curved boundaries formed by circular arcs often found in hydraulic structures. The boundary geometry considered are: (1) Semi-infinite pier in closed conduit with head part formed by two circular arcs, (2) Isolated circular-arc irregularity on the wall of closed conduit. Analytical results. found by means of conformal transformation were compared with experimental data from wind tunnel and water tunnel tests, and with those obtained in previous investigations. Data on incipient cavitation number found from water tunnel tests and from published papers were compared with some of the calculated—C_(pmin). Agreement is good.

    本文分析和計算了管道中沿三种圓弧形边界的压力分布,并給出了最小压力系数:(1)由二对称圓弧組成的閘墩头部;(2)边墙的半弓形突体;(3)边墙的弓形突体.根据最小压力系数和有关空穴发生的縮尺影响方面的研究,即可估計原型的初生空穴数.为了防止水流发生塞穴,設計的过水空穴数不得小于此值.

     
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