水力学

The technique does not have any simplification of drainage holes. In this paper, discussions are mainly conducted on the substructure mesh dividing and its second time automatic dividing, the substructure shape, the continuity among substructures and general elements, the classification and definition of the integrated hydraulic model of drainage substructure, the iteration computation of water level inside drainage hole, the application of the technique in solving unsteady unsaturated seepage field, etc., therefore, the high efficient, precise and quantitative analysis of the complex seepage with densely distributed drainage holes is totally realized.

该技术不对排水孔幕作任何简化，本文着重从子结构网格划分模式及二次自动剖分、子结构单元形态、子结构与总体单元网格之间的连续性、排水子结构完整水力学模型分类及定义、排水孔内水位迭代计算、排水子结构法在非稳定非饱和渗流场中的推广应用等各个方面进行论述，实现了对工程复杂渗流场中密集排水孔幕的高效、精细、定量分析。

The reliability of proposed model is verified by the data of the water depth in the drainage and emptying tunnel of a reservoir as well as the experimental result using hydraulic method. The average relative errors are 5.01% and 0.96% respectively.

通过与某水库放水兼放空洞水深实测数据及采用传统水力学方法计算的经验值的对比分析，平均相对误差分别为5.01%和0.96%，验证了模型的可靠性。

It was found by water modeling study that there are mainly three types of mold powder entrapment in slab continuous casting, i. e., the entrapment caused by the shearing flow near the narrow face of the mold, the entrapment caused by vortexes in regions around the submerged entry nozzle and the entrapment caused by the disturbing action of the Ar bubbles on the interface between liquid steel and mold powder.

对板坯连铸结晶器保护渣卷渣进行的水力学模拟研究结果表明，主要有三种类型的卷渣，即窄边附近的剪切卷渣、浸入式水口附近的旋涡卷渣和水口吹入的氢气泡上浮冲击钢渣界面引起的卷渣。

The hydraulic equation describing the transient flow in canal is transformed into a dynamic equation expressing the control procedure. On this basis, the relationship between variation of flow state and gate opening is established.

从明渠控制方程出发，通过数学处理将描述渠道过渡过程的水力学方程转化为描述控制作用的动态方程，从而建立起渠道水流状态变化与闸门开度变化之间的关系。

The FRP tube has a very slippery surface, with roughness rate only 0.009, which is considered as perfect slippery Tube for hydraulic. In daily usage, the wall of the tube of steel, iron or concrete are often corrosive and become rough, while the cross-winding tube can keep a clean and slippery wall surface.

玻璃钢管道内表面相当光滑，一般表面粗糙率可达0.009，几乎可以认为是&水力学光滑管&，在实际运行中，钢管、铸铁管、水泥管等的内表面，经常发生局部腐蚀，变得越来越粗糙，而往复交叉缠绕玻璃钢管道始终保持着新生管表面光滑状态。

It is a complicated problem involving several of subjects such as geology, coal mining, rock hydraulics and rock crack mechanics.

采煤工作面底板突水是涉及煤矿地质学、煤矿开采学、岩体水力学和岩石断裂力学等学科的一个比较复杂的问题。

Runoff experiments were conducted on the loess slope to determine the hydrodynamic characteristics of the rills.

本文通过径流冲刷试验，对黄土坡面形成的细沟的水力学特征进行了试验研究。

At the same time, the theory that concerns the capillary hydraulics in micro-irrigation system neglected the velocity head is drawn on the basis of analysis.

同时，通过分析论证给出了微灌系统中的毛管水力学忽略流速水头的理论依据。

The study objects of this text are highway and railway tunnel. This text analyze form and mechanism of cause of the tunnel"s disease through knowledge theory such as :rock mechanics, soil mechanics, hydraulics, hydrodynamics, chemistry ,and so on. And combine last criterion, rule and engineering practice, provide the tunnel disease"s the design of prevention and cure, method of construction, new technique, new material, new craftwork. This text provide some advantageous consult values for tunnel prevention and cure.

本文以公路及铁路隧道为研究对象，运用岩体力学、土力学、水力学、流体力学、化学等学科理论，以宏、微观相结合的方法分析了渗漏水、冻害、衬砌裂损及衬砌腐蚀4种常见隧道病害的表现形式、成因机理，结合最新的规范、规则和工程实际给出了隧道病害的防治设计、施工方法以及新技术、新材料和新工艺，为隧道防治提供了有利的参考价值。

So far the company has the ability to produce 7 series and about 40 specifications of produces,different levels of Electronic Balances,mechanical balances,liquid specific Gravity Balance,Tray Torsion Balance,Moisture determination meters,Static water Mechanice Balances.

目前我公司已具备生产不同等级的电子天平、机械天平、水份测定仪、静水力学天平、液体比重天平、托盘扭力天平等七大系列近四十个规格品种的产品，是上海市质量技术监督局认定的专业生产计量器具的企业。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。