水流

The pulsate pressure in high speed flow water will influence the safety of water construction, and the eigenvalue of the pulsate pressure should be confirmed by hydraulic model testing.

高速水流中的水流脉动对水工建筑物的安全运行存在很大的影响，水流脉动压强的特征值一般需通过水工模型试验确定。

It is quite a reduction in water flow, down to one third of its original force, so it is likely that it takes Sunnyside's tenants much longer to take a shower.

把水流控制在原水流的三分之一，水流肯定减弱了许多，因而很可能阳光公寓的房客冲淋浴的时间延长了许多。

The purpose of opening the orifice was to sluice. The influence of fluctuating pressure upon the dam was another problem which was concerned by engineer. The paper analyzed Shuangkoudu masonry arch dam. The result indicated that the dam natural frequencies which consider the dam and the reservoir water interaction have great different from the preponderant frequencies of fluctuating pressure, the dam's first rank of vibration was far away from the high energy region of the fluctuating flow, so the sympathetic vibration would not take place.

坝身开设孔口主要目的是为了泄洪，泄洪时水流脉动压力对坝体结构动的影响是设计人员关心的另一课题，论文针对双口渡浆砌石拱坝进行了分析，研究结果表明：在考虑坝体一库水相互作用时坝体自振频率和水流脉动压力的优势频率相差较大，坝体的一阶振动远离脉动水流的高能量范围，二者不会发生共振。

By use of 3-D ultrasonic doppler velocimeter,the turbulence characteristics of water flow in the spur dike head and backflow region are observed and analyzed systematically.

利用三维超声学多普勒流速仪对丁坝坝头附近水流和回流区水流的紊动特性进行了系统的观测和分析，得到了丁坝坝头和回流区的水流特性及紊动动能的分布规律。

Calculations of flow are verified at the same time, verify the results with the actual line with the better to prove that model can better simulate Xinjizhou distributaries channel of the situation of water sport, and an analysis of distributaries channel of flow characteristics under the natural state, technical reference is provied of the next step improvement of distributaries channe .

同时进行水流验证计算，验证结果与实际符合较好，证明模型能较好地模拟新济洲分汊河道的水流运动情况，并分析了汊道天然状况下的水流特性，为汊道下一步整治提供技术参考。

Prediction of sediment concentration is investigated. Taking Toudaoguai hydrological station as an example, the factors affecting the sediment concentration in the non-freeze-up and freeze-up runoff models are analyzed and the neural network models of sediment concentration prediction are established.

3以黄河头道拐水文站为例对水流日均含沙量的预测进行了研究，在对黄河非凌汛期和凌汛期等不同径流模式下水流含沙量的影响因子进行分析的基础上，分别建立了各径流模式下的水流含沙量的神经网络预测模型。

Based on numerical simulation flow after treatment methods and implementation. This paper drawing river ice jam thickness contour map, vertical water flow under the ice jam contour map as an example, the use of Surfer software described in detail various graphics rendering; Focused on the Surfer with VB programming software secondary development to achieve flow numerical simulation after treatment, showed that automatic change the data files to the Surfers;Introduced Active automation technology and Visual Basic Application Program Interface, and the interface technology will combinate VB powerful software development capabilities and Surfer software powerful mapping functions , achieve the key code and the mapping results map examples: under the ice sheet flow velocity field vertical contour map, three-dimensional wire-frame plans, such as flow field vector graphics, and dynamic display and output the graphics.

基于水流数值模拟后处理的方法与实现，本文以绘制河流冰塞厚度等值线图、冰塞下水流纵向流速等值线图为例，详细介绍了运用Surfer软件绘制各种图形的方法；重点阐述了用VB编程对Surfer软件进行二次开发实现水流数值模拟后处理，显示向Surfer数据文件自动转换的过程；介绍了Active自动化技术及其与VB应用程序的接口技术，并利用该接口技术将VB的强大软件开发能力和Surfer软件强大的绘图功能相结合，给出了实现该接口技术的关键代码以及绘制成果图件的实例：冰盖下流速场纵向流速等值线图、三维线框图、流场矢量图等图形，并输出图形与动态显示。

delta ; resistances of movable bed ; intensity of stream flow ; dunes ; ice lid

较全面揭示冲积性河流阻力关系的H·A·爱因斯坦，他根据床面泥沙的运动影响与水流强度之间的关系及水体能量的分配、传递方式，把冲积性河流的阻力分成以下几个单元：沙粒阻力、沙垅阻力、河岸阻力、河槽形态阻力等，并通过水槽实验和野外实测资料的分析验证，提出了明渠水流阻力的可加性原理[1-2]———水流总阻力等

The optimization of the layout of the stilling well was also studied. The results show that the sudden enlargement between the circular inlet and the shaft in this spillway is significantly different from the traditional face-stuck shaft. This can prevent cavitation of the vertical shaft by high-velocity flow, reducing the difficulty of construction.

研究表明，该溢洪道自环形进水口以下采用突扩方式与竖井连接所形成的脱壁水流结构，与传统的贴壁式竖井的水流结构具有明显不同，不仅可以有效避免竖井段因水流流速较高可能造成的空化空蚀破坏，降低施工难度，而且有利于水舌掺气并促进消力井消能。

Although forest canopy layer could prevent splash erosion effectively, clay was taken away by overland flow and run off easily, the erosion amount became less after removing the forest canopy and surface soil, while the splash erosion still produced in the surface layer; the splash function weakened after having water current, the starting particles were less than bareland, so removing the surface disturbed soil made the erosion amount and clay less, silty sand more than bareland, but unsteady, the wear and tear energy used by raindrop splash and current function for overcoming sediments separating and starting were comparatively large, sediments were very difficult to be started and transported, it explained that forest root systems could increase anti-erosion capability of forest vegetation, make rainfall-current system splash and export finer particles than bareland.

虽然林冠层能有效防止溅蚀的发生，但坡面流还是能带走粘粒部分，粘粒还是容易流失。去除林冠和表层土后，侵蚀量变得更少，但表层还是会被溅蚀，有水流后，溅蚀作用减弱，颗粒起动的比裸地的少，所以，去除表层扰动土后，侵蚀量更少，粉沙多，粘粒比裸地更少一些，但不稳定，雨滴击溅和水流作用用于克服泥沙分离起动损耗的能量较大，很难被起动输移，这说明森林植被根系的作用增加了林地植被的抗蚀力，使降雨一水流系统仅能溅起输出比裸地坡面更细小的泥沙颗粒。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了