水力的

The reason of white band formation in the solidified shell in the mold has been studied by means of water modeling test and the analysis of the solidified microstructure of practical CC slab an.

为了定量把握结晶器中的钢水流动、钢水过热度及结晶器传热阻力对初期凝固坯壳的凝固不均一的影响，利用水冷铜板的浸渍实验，测定了各种铸造条件下的凝固坯壳厚度、凝固不均一度及树枝晶偏角；利用水力模型实验，并对实机铸坯的凝固组织分析，EPMA对负偏析带的线分析，得出了在结晶器中凝固坯壳上负偏析带的产生原因。

The main results can beexpressed as follows:(1)Based on πtheory, some affected factors about wave forces are given, and therelation between affected factors and wave forces is analysised by experimentalresults.(2) The distribution of wave press at representative time and reflection nature aregiven and their variety charactes are discussed by experimental results.(3)By comparing the wave forces of quarter-circular breakwater and semi-circularbreakwater under the same wave conditions,some approximately wave forcesexpressions of quarter-circular breakwater are given.(4)Based on VOF method to trace water free surface,solve numerical value ofRANS equation,and get the distributions of flow field and wave press ofquarter-circular breakwater at the same time during one period,the mechanism ofwave force is also discussed elementarily.(5) Based on the result that RANS equation of numerical simulation agree wellwith experimental results,a new approach to study hydraulic natures of quarter-circular breakwater is provided.

其主要结论如下：一、通过π定理，确定影响波浪力的无因次参变量，根据试验结果对其影响因素进行分析；二、基于模型试验，给出典型时刻圆弧面防波堤的同步波压分布和反射特性，讨论它们的变化特点；三、通过相同条件下圆弧面防波堤与半圆型防波堤两种堤型试验波浪力的比较，给出了圆弧面防波堤波浪力的近似方法；四、利用VOF法追踪自由水面，数值求解RANS方程，得到圆弧堤堤体周围的流场和压力场，初步分析了速度涡流与压力场的相互影响；五、对比数值分析与试验结果，探讨数值方法研究圆弧面防波堤水力特性的可行性，提供新的研究途径

This paper has presented the types and distribution characteristic of the Quaternary glacial deposits on the west side of the Yulong Mountains, which was an important task for the selection and optimization of the Yunnan-Tibet railway line in Northwest Yunnan. Based on lab test of physics and mechanics, the results of engineering properties of moraine/outwash rocks, including the cement composition and their cementation, stability in water, mechanical property, and sound spreading velocity, etc., have been reported, which can not only enrich the research contents of rock mechanics, but also have important practical value for railway construction and water power development in mountain regions.

结合滇藏铁路滇西北段线路比选和优化工作，对云南玉龙雪山西麓第四纪冰川堆积物的类型和分布特征进行了详细的野外调查；在室内物理力学试验的基础上，着重研究了冰碛砾岩的胶结物成分与胶结作用、水稳性、力学性质、声波速度等方面的特性，这不仅可以丰富现代岩石力学的研究内容，而且对本区铁路工程建设和水力资源的开发具有重要的实际价值。

In chapter 3, combining specific example, set vibration, axis swing, pressure pulsation and spectrum is analyzed, the stability of the water-power set is evaluated, unbalanced factors existed in the set is pointed out, possible excitation sources is obtained, hydraulic excitations as the most important factor is emphasized, measure aimed to improve set operation is provided and stable interval is divided.

第三章主要结合具体工程实例，通过对机组的振动测试结果分析、轴摆度测试结果分析、水压脉动测试结果分析以及频谱分析，从不同的角度综合评价机组的运行稳定性，指出了机组所存在的各种不平衡因素，给出了可能影响机组运行的各种振源，强调了水力振源是最主要的影响因素，提供了改善机组振动状态的措施并划分出机组的稳定运行区间。

Paper industry the past few years of hard work elites and radical reform of our paper has been the rapid development, but in the second half of 2008 the global financial crisis under the fierce attacks of the paper we are faced with unprecedented challenges, reduce a large number of foreign orders, hydro pulper aging equipment, paper machine operating speed of the slow, low value-added products, filter equipment, up-flow low pressure output screen, high power consumption, coupled with China's increasing pollution of the paper industry environmentally friendly water treatment sludge, objectively, there are difficulties we are now, how fast out of the current predicament?

经过这几年造纸行业精英们的艰苦努力及大刀阔斧的改革我们的造纸业有了飞速发展，但是在08年下半年全球金融危机猛烈的侵袭下我们的造纸业正面临着前所未有挑战，国外订单大量缩减，水力碎浆机设备的老化，纸机车速的运转缓慢，产品的附加值低，筛选设备升流压力筛的产量低，电耗高，加上我国加大对造纸行业污水污泥的环保治理，客观上我们现在是有困难，如何快速走出当前的困境？

With respect to the optimization design of sewer network,tree structured theory was used to depict the sewer network,ternary tree form was proposed to treat the sewer network structure,and pipe section was regarded as node in this study.

对于污水管网的优化设计，采用了图论中树形结构的理论来描述污水管网，提出用三叉树的形式来处理污水管网的网络结构，把管段当作树的节点作为研究对象；利用树的遍历中的后序法进行水力计算，在优化计算时采取了枚举标准管径法来选取管径，可以提高运算速度；在优化程序中寻求造价最低、最优的同时考虑了管道费用和泵站费用。

Analyze the characteristic and virtues of the electric balancing valve,Analyze the difference between the electric balancing valve and the electric valve,Introduce that the electric balancing valve is a integrative product with the functiongs of dynamical balancing and electrical regulating ,Introduce the application and virtues of the valve in Variableness flowrate system,Introduce the concept of All Balancing in Variableness flowrate system and characteristic of high-effiiciency and energy saving and how to come it true

摘 要：本文分析了动态平衡电动阀的特点及与传统的电动阀相比较的优点；揭示了动态平衡电动阀是区别于传统电动阀的产品，是动态平衡与电动控制一体化的产品；介绍了这种阀的应用及在系统负荷波动较大的变流量系统中的优势，同时提出了变流量水力系统全面平衡的概念、高效节能的特点及实现途径。

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本品采用天然的活性胶原蛋白多肽为原料，独有的SAYF融合弹性纤维的微纺技术，完美贴合眼部轮廓，可快速补充皮肤在外界所流失的水分，功效营养物质通过透皮吸收原理，快速渗透到皮肤的基底层，并渗提高皮肤细胞活力，其95%有效吸收留住水分，平衡PH值，使皮肤增加弹性和柔软性；明显改善与老化相关的胶原合成低下的现象，有效预防和减少眼部肌肤皱纹及松弛的现象，恢复润泽和弹性，同时补充眼部皮肤在各种温度不定的情况下流失的营养，提升眼周肌肤自然储水力，双眸瞬间滋润、光滑、丰盈，焕然一新，细纹与皱纹减少，黑眼圈变得不再明显。

In this paper, based on the data of flume experiments and field engineering, the indicial method of dimensional analysis is compared with the method based on energy equation. the characteristics of the two methods are analyzed and the application conditions are put forward. this research can provide evidence for method selection of radial gates hydraulic calculation or calibration.

通过弧形闸门的实验室水槽数据和现场观测数据，将传统的基于能量方程的方法和量纲分析的表征方法进行了比较，在分析了不同方法的特点的同时，指出不同方法的应用条件，为闸门水力计算和校准等计算方法的选择提供了依据。

The experimental results indicated that the longer the po uring intervallic time of the two kinds of molten metal and the higher the heigh t of the molten iron to pour into the tip of dipper teeth , the narrower its tran sitional zone will be, on the contrary, the wider its transitional zone will be.

用不同粘度的流体通过水力模拟的方法近似地描述了双金属斗齿过渡区的混合状态。试验结果表明：两种液体浇注的间隔时间越长，先浇入的铁液液面越高，过渡区越窄；反之，过渡区越宽。生产中为了保证过渡区双金属的结合质量，应控制较高的铁液液面高度及一定的双液间隔时间

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。