水力

The above analysis and calculation results resolved the problem that how to reasonably select the shrink rang during the design process and confirmed the assembly temperature under different shrink fit, which avoided the blindness of assembly, provided some better suggestion for the design of the rotor and offered reference datum for the safety and the steady running of the rotor.

上述分析计算结果解决了转子设计时过盈的合理选取的问题，并确定了在不同过盈配合情况下转子安装时所需的加热温度值，避免了安装过程的盲目性，对转子的设计工作提供了一些较好的解决方案，为水力测功器安全、稳定运行提供了参考数据。

The results show that the porous pipe quantity, head loss and hydraulic deviation rate of the porous pipe would increase while water head in entrance, pipe length and porous pipe permeability increasing. The head loss mainly concentrated on the top half of the porous pipe.

结果表明，随着进水口压力、管长和微孔渗灌管透水性能的增加，微孔渗灌管水流量、沿程的水头损失和水力偏差率增大，且水头损失主要发生在微孔渗灌管靠近进水口的前半段。

Based on the ana1yse of the way of the water pipe network's management and the difficult problem which exist in the course of running water pipe network It presents the collectivity project of the city service pipe network Geography information manage system and estab1ish the waterpipe network's basic data-base,and conform afresh the network data by the mode of data-base organization. Then on the base of it,open out the water pipe networks graphics show and edit,hydraulic simulation module,disposal accident module and data query andanalyse module and set up the geography information system.it will exert the network's data-base and computer effect on the city water management.

在对目前给水管网管理方式以及管理过程中碰到的问题进行分析的基础上，给出了城市给水管网地理信息管理系统的总体方案和详细设计，同时建立了给水管网基础数据库，依照数据库的组织方式对管网数据进行管理、编辑和分析，并在此基础上，开发了城市给水管网图形显示、图形编辑、水力模拟、管网事故处理、管网数据查询分析和管网数据专题图等功能模块，建立了城市给水管网地理信息系统，以充分发挥管网数据和计算机技术在城市供水管理中的作用。

At the maximum head, the shaft power of prototype pump is less than 2 300 kW. The hydraulic model and optimal straight outlet conduit meet the operating condition of the pumping station.

所选用的水力模型性能满足泵站的实际运行要求，经过优化的直管式出水流道保证了泵装置高效稳定运行。

Blending the traditional hydraulic computation method with the genetic algorithms to realize the sewer pipe network optimal design can improve the design equality and efficiency of sewer pipe network design and is worth to be used in project practice.

将传统的污水管网水力计算方法与新型的遗传算法有机融合进行污水管网优化设计，能有效提高工程设计效率和设计质量，值得在工程实际中加以推广应用。

Self-advanced high pressure water jet drilling technology is to use mechanical or water jet apparatus to form a cavity at the selected coal seam, a specially made whip-stock is then to be installed in the cavity to drill inseam horizontal holes from the vertical well.

自进式高压水射流钻进技术是在煤层气勘探井內佈置机械或水力扩孔装置，对准选定的煤层进行扩孔后，下入特製的转向工具，在300 mm的曲率半径內实现由垂直转向水平进行钻进。

After the coagulation and sedimentation in the jar test with ferric chloride, the residual COD in the supernatant was 9000 mg/L which was further oxidized by chloric acid or with Fenton method. The COD removal efficient increased with the increasing of the dosage of chloric acid from 0.5 ~ 100 g/L or the H2O2/Fe2+ from 5/2.5 ~ 50/25 g/L, and the economical dosage were suggested as chloric acid 50 g/L or the H2O2/Fe2+ 50/25 g/L which resulted in the residual COD of 400 and 3300 mg/L individually for 95 and 63 % COD removal percentages. Oxidation test showed that only 5 minutes was needed for 92 % COD removal in the case of chloric acid dosage 50 g/L.

废液A经氯化铁混凝沉淀后，COD浓度可降低至9，000mg/L，仍未符合符合工业区污水厂进厂限值(＜650mg/L)，进而使用氯酸钠直接氧化法及Fenton法以去除剩余之COD，其操作条件范围分别为氯酸钠加药量0.5g ~ 100g/L ，而最适加药量为50g/L，及Fenton法H2O2/Fe2+加药量范围为5/2.5g/L~50/25g/L，其最适H2O2/Fe2+加药量为50/25g/L，两种方法处理后残余COD浓度分别为400mg/L及3300mg/L，去除率约为95%及63%，而依此判断氯酸钠氧化处理残余COD有较好之效果，且利用氯酸钠氧化速率快，5分钟就能有92%去除率，所需水力停留时间较短，由此实验建议利用氯酸钠直接氧化处理，最适加药量为50g/L。

Due to the complexity, It is necessary to study further the performance of a slurry pump transporting sand.

由于问题的复杂性，泥泵输沙水力特性还需要深入研究。

This paper introduces sand jet fracturing's system structure, technique and features.

介绍了水力喷砂压裂系统的构成、施工工艺及其特点。

For most of the new explorative lays are between 2000m and 3500m, and the geologic structure is complex, So there are many field problems for fracturing string, such as low packer pressurization ; leaking off of hydraulic anchor; serious erosion of the inwall for pressure transmitting sand blaster.

但由于新探明层位大都在2000米到3500米之间，地质构造复杂。现场施工中压裂管柱出现了诸如封隔器承压指标低；水力锚锚爪漏液；导压喷砂器内壁磨蚀严重等问题。

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。