水流

The drag force s are the major forces that make the object move in the horizontal direction.

抛筑在水流中的块体，在水流作用下一般受到水平拖曳力和垂直上举力的作用，其中水平拖曳力是促使物体运动的主要动力。

Determine rivers silt method of content adopt traditional" dry law of weighing" both at home and abroad at present, Cycle of measuring it long, detection procedure convoluted, labour intensity not heavy,can't good monitoring course not dynamic of the riverses very.

目前国内外测定水流泥沙含量的方法采用传统的"烘干称重法"，其测量周期长、检测过程烦琐、劳动强度大，不能很好的监测水流的动态过程。

A hydraulic turbine is the device which turns kinetic energy of water into circumrotation power energy, and makes dynamotor working, then transfer energy to other place.

水轮机是一种把水流的机械能转变为旋转机械能的动力机械，它一般是以水流为动力带动发电机工作，从而把能量远距离输送出去。

In order to justify the efficiency during the water elutriation process of separating ceramic inclusions from FGH95 alloy powder, the maximum theoretical and experimental size of FGH95 powder elutriated was compared at different water flowing velocity.

摘 要：通过对水淘析法的原理分析，运用流体力学中的摩擦数群法确定了以陶瓷夹杂物在水中的沉降速度来确定水流速度，及在确定的水流速度下，所能淘析出的FGH95合金粉末的最大尺寸；并以比较淘析出的FGH95合金粉末的实际最大尺寸与理论最大尺寸，考察了水淘析法分离FGH95合金粉末中的陶瓷夹杂的有效性。

At the confluence zone, due to the jacking of current from main stream and tributary stream, the mixing and turbulence of current is so strong and the loss of energy is so large that the balance of water and sediment is broken which could causes sediment particle and coarse grain to deposit and forms shallow shoal at river mouth or eyot.

天然河流中存在着大量的干、支流交汇的河段，在干支流相汇处，由于干、支流两股水流相互顶托，交汇区内水流紊动掺混作用强烈，能量损失很大，干、支河流原有的水沙平衡状态被打破，可能导致泥沙颗粒、尤其是粗颗粒卵石在汇合口处大量淤积，形成河口浅滩或江心滩。

Accordingly, in an attempt to stabilize the water current, to make fish migration easy, and to help shrimp to crawl over the check dams to upstream to breed, it is considered to add a porosity filtering on the main body of fishway (hereuinafter referred as improved fish-bone-type fishway).

但水流在鱼骨型鱼道中流况非常紊乱，故考虑在鱼骨型鱼道之主要支干上加一多孔隙滤材(本文称改良后鱼骨型鱼道)，使水流较趋於稳定，水中鱼类更易於上溯外，更让虾类藉以攀爬至防砂坝上游繁殖。

Based on systematic open flume flow experiments, this paper investigates the basic lows of thermal diffusion coefficients in water flow.

在系统的明槽水流试验基础上，本文探讨了水流热扩散系数的基本规律。

In city , because the occupied area of the urban sewage pumping station is usually limited , the length of the forebay is inclined to be short and the diffusion angle in flow direction is big accordingly , which causes bad flow pattern, such as backflows ,vortices, etc.

城市排污泵站由于条件的限制，前池一般面积较小，扩散角较大，扩散段较短，因此水流进入前池后突然扩散，流态紊乱，易行成回流、漩涡等不良水流流态，从而影响水泵的工作性能。

Based on analysis of the factors affecting subgrade local scour along the river such as condition of stream,condition of bed form,geometric boundary condition of river,water depth and speed of every section,scour depth of parapet,the progress of scour and the form of stream near parapet were observed through the way of field model experiment.

在对沿河路基局部冲刷影响因素如水流条件、河床沙条件和河流几何边界条件等进行分析的基础上，通过野外模型试验，观测了河流各断面的水深、流速、护墙的冲刷深度和冲刷的发展过程及护墙附近的水流形态。

The bifurcated flow, a common morphology of flow motion, usually occurs in natural rivers and headrace open channels etc. Controlled by its boundary, the bifurcated flow is complicated in structure and specialized in river evolution.

分汊流是常见的水流运动形态，常出现在天然河流、引水明渠等工程中，受边界控制，水流结构复杂，河道演变特殊。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。