水力的

It will introduce head loss of the way and part in a pipe, hydrodynamical calculation of a simple pipe, the principle of operation, the structure and the performance parameter of a pump, similarity law and specific speed, as well as matching between the pump and piping, working point and united running et al.

第二篇为给水管网的设计计算，介绍城市给水的分类和用水量标准，沿线流量和接点流量，城市给水管网的水力计算，以及管网设计计算的计算机方法等。

The results show that by providing wastewaters pH of about 3 and reaction time of 2 hours, the quantity of H2O2 of 40 mL/L, the concentration of ferrous iron is 0.4 g/L, the effluent of microelectrolysis goes into Biological contact oxidation process, in which DO, HRT and volume load are 4.5 mg/L, 10 hours and 1.0 kg CODCr/(m3·d) respectively, satisfying the first grade of the national standard.

结果表明，在废水pH值为3左右、反应时间2 h的前提下，双氧水投加量40 mL/L，二价铁离子质量浓度为0.4 g/L，再经过微电解处理后的出水进入接触氧化阶段。在溶解氧为4.5 mg/L左右，水力停留时间为10 h、容积负荷1.0 kg CODCr/（m3·d）左右的条件下，出水CODCr小于100 mg/L，可达到国家对丙烯腈废水处理要求的一级标准。

RELAP5/MOD2/RMA is a best estimated transient simulation code which adopted the nonhomogenous and non-equilibrium two-liquid model with six governing equations to describe the thermalhydraulic phenomena of mass, momentum, and energy for both the liquid and vapor phase respectively, which eliminates the constraint of one saturated phase existed in the previous versions.

RELAP5/MOD2/RMA程序是一个最佳估算瞬态分析程序，采用六方程描述非均相、非平衡态的液相及汽相的质量、动量、及能量的热工水力现象，消除了先前版本中两相流体必有一相为饱和态的限制，被广泛用于小破口失水事故及其他瞬态的分析与计算中。

The dynamic simulation test showed that, the removal rate of TN、 NH_3-N、TP of Oenanthe javanica floating-bed was positive correlated with water temperature. The average removal loading rate of TN and TP were 0.80g/m.~2·d and 0.11g/m~2·d, respectively. The inhibition on algae was steady and the average inhibition rate was 57.3%. We also got the best value of hydraulic loading rate, floating-bed coverage rate, water depth under dynamic polluted river. They were 1.0m~3/(m~2·d)、 30%、 30cm.

动态模拟试验表明：水芹菜浮床对动态污染河水中TN、NH_3-N、TP的去除率与水温正相关，TN的平均去除负荷为0.80g/m~2·d，TP的平均去除负荷为0.11g/m2~2·d，对藻类的抑制作用较为稳定，平均抑制率为57.3%；获得了对动态污染河水最佳净化效果时的水力负荷参数为1.0m~3/(m~2·d)、浮床覆盖率为30%、水深为30cm。

The Tibetan Plateau provides the ideal environment for pashmina growth.The fiber is exceptionally absorbent,and it dyes very easily and deeply.

西藏高原为羊绒的生长提供了完美的环境，此处出产的纤维具有出奇的吸水力，染色也很容易，染的也到家。

The solution in the reactor has uniform inner heat source, and there are tiny air bubble built, the whole system is running by natural convection and the driving of air bubble. The gas-liquid two phase flow and heat transfer are mutual effecting to become the complex pyrology system.

堆内溶液是一个具有均匀内发热源，并伴随有微小气泡均匀生成的自然对流和气泡驱动同时作用下的三维复杂两相流动的物系，气液两相流流场与传热温度场相互作用，产生复杂的热工水力现象。

The hardness of the mixed gels increased with salts concentration, while the protein solubility, water-holding capacity and sulphydryl group content had a decreased trend. The microstructure of mixed gels showed a porous network and particulates structures by addition of NaCl and CaCl2 respectively.

结果表明：随着pH的增加，凝胶的硬度和溶解度减小，添加淀粉进一步降低了混合凝胶的溶解度；盐浓度的增加使混合凝胶硬度增加，而蛋白溶解度、持水力和巯基含量则呈下降趋势；添加NaCl 和CaCl2的混合凝胶分别呈现出多孔网状和颗粒状结构。

According to the pilot researches,the effects of Typha wetland and hydraulic retention time in the purification efficiency for highly salty reused water treatment in TEDA Landscape River were studied in this paper,while different kinds of contamination is evaluated.

通过香蒲湿地对天津泰达景观河道水体污染物去除的室内试验，研究了香蒲湿地对泰达高含盐再生水的净化效果以及水力停留时间对水质净化效果的影响，考察了不同污染物的去除情况。

The novel device integrates two important microfluidic phenomena, including hydrodynamic focusing and valveless flow switching inside multi-ported micro-channels. In this study, a simple theoretical model based on "flow-rate-ratio" method is first proposed to predict the performance of the device. Based on these data, a pre-focused 1xN flow switch is designed and fabricated using micromachining techniques.

本专题中的微流体晶片同时涵括了以下两种很重要的微流体现象--(1)水力预集中（hydrodynamic pre-focused ）以及(2)无阀式开关的切换方式，并在同一平面上作流向控制，以便将相同样品注射至不同或相同之出口槽(output-port)以连接至不同的微流体分析晶片，以达成多功能连续式的样品进料功能。

The results indicate: diversion shell can transform the kinetic energy of fluid into pressure energy well, and eliminate the circumferential component of fluid; the inlet incidence angle of vaned diffuser increases at the condition of O.8Q, and it results in flow separation very likely and the hydraulic loss increases; it is nearly non-impact inflow at the condition of 1.2Q, and the velocity distribution is uniform at the inlet of vaned diffuser and flow separation dose not appear.

结果表明：导流壳能很好地将叶轮中流出的流体的动能转化为压能，并消除速度的圆周分量；在0.8Q工况下，空间导叶的进口冲角增大，容易在空间导叶背面产生流动分离，造成水力损失增加；在1.2Q工况下，空间导叶的进口接近无冲击入流，在进口处流速分布较均匀，其内部未发生流动分离现象。

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。