并流

The flow pattern and flow field in the energy dissipater in tunnel are simulated with the two-dimensional numerical model under different operating conditions.

通过比较各种追踪自由面的方法，选择了流体体积法来模拟自由水面，并与RNG k-ε紊流模型耦合建立了无压隧洞内消能工的水气二相流数学模型。

The flow pattern, the distribution of average dynamic water pressure and the flow velocity near the floor of lip energy dissipater by hydraulic jump are analyzed through the method of hydraulic test.

采用水力学试验方法，对跌坎型底流消能工的水流流态、时均动水压力分布以及临底流速进行了分析。并对影响消力池水力特性的跌坎深度和水流入池角度进行了研究。

We use Web page and streaming-media to realize the computer networkcourseware. In the course of doing streaming-media courseware, we do acourseware as an integration of five components: video, audio, caption, syllabusand diagram dividually and manages them separately.

计算机网络课件用 Web 页面和流媒体来实现，流媒体课件的制作过程是把一个课件分成视频、音频、字幕、提纲和图表等五种组件进行制作，并对它们分别进行管理。

The problems existed in the P2P media streaming systems are analyzed. The control technology and data technology of the DONet is studied. An P2P live media streaming system PP-video is designed.

分析现有P2P流媒体系统存在的问题，以及研究DONet系统控制和数据传输两方面主要技术的基础上，设计并实现了一个基于DONet模型的P2P流媒体在线直播系统PP-Video。

Several tetraalkylammonium reagents were examined for controlling the electroosmotic flow in order to improve resolution of the enantiomers.

考察了不同种类季铵盐对电渗流及分离的影响，其中四甲基氢氧化铵能有效控制电渗流并提高组分的分离度。

At last, the implementation of the proactive knowledge service system based on ontology and work is primarily given out with the open source workflow of the Enhydra Shark project, and it is primarily applied to a specific project.

最后，在工作流开源软件Shark平台的基础上，初步实现基于本体和工作流的主动式知识服务系统，并初步应用于具体的项目。

The integrated mathematic model of solidification is then established, which includes heat transfer, solute transfer, liquid flow and the movement of equiaxial crystals in solidification process.

本文通过两相流理论建立了等轴晶在对流金属液中移动的非稳态数学模型，推导了求解等轴晶在非稳态、非均匀液相流场中非稳态移动的数值表达式，并进一步推导了描述等轴晶在凝固过程中迁移、堆积规律的局部堆积方程式。

Based on analysis of the current state of the flow pattern modeling abroad and at home, explains the meaning of the mathematical simulation of the flows in the valve.(2) Comparing flow simulation data of jet pump with its experimental one, the feasibility and reliability of FLUENT used for flow simulation are proved.(3) Based on the characteristic of valves, the fluid field analysis of specific ring-spray type flow-adjustable is finished. The valve structure is optimized to meet the need, which makes it have such advantages:(1)smaller vortex area and faintish vortex intensity, so the vibration of vortex is controlled effectively;(2)the pressure is distributed more equality, the transition area is larger.

论文的主要内容包括：(1)简述了阀门研究的现状与发展，在分析与总结国内外流体流动模拟研究的基础上，探讨开展阀门内水流运动数值模拟的意义；(2)对特定型号的射流泵进行了内部流场的数值模拟研究，并与实验数据相比较，验证了应用Fluent进行数值模拟的可行性和可靠性；(3)针对调流阀的特点，对特大口径环喷式流量调节阀进行流场计算，其设计指导思想如下： 1、控制旋涡，减小旋涡区，减小涡的强度； 2、控制压力分布，使阀体受力更均匀，改善局部应力状态，提高阀门使用的安全性； 3、最小绝对压力高于水的汽化压力，不产生汽蚀。

Concetrating on turbulent transfer of evaporating liquid film in short-path distillator under high vacuum, applying probability density function model, two dimension mathmatics models had been build and simulated with a computational fluid dynamics software in the wiped turbulent evaporating liquid film fow.

以短程蒸馏在高真空条件下的湍流传递为研究对象，应用概率密度函数模型的基本理论，对蒸发器上液膜的湍流流场进行了二维两相流数学建模，并利用FLUENT流体力学计算软件进行模拟。

This model considers more factors, especially great and complex effect of geological factors on grouting spread, Value of fissure aperture is cleared and defined, all kinds of parameters of geology and grouts property in connection with model can be tested accurately, therefore this approach practice more and have more practical value comparing with other grouting model to provide solid theoretical basis for grouting controlling method.

在频率水力隙宽和宾汉流体的渗流规律的研究成果基础上，考虑地下水影响半径、频率水力隙宽、粘度时变性、裂隙的倾角和方位角、流核等诸多影响因素，建立了牛顿流体和宾汉流体的注浆扩散模型，并对数学模型实现了计算机模拟，便于工程实际中的应用。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。