水力的

Dredge pump or slurry pump is an application of solid liquid two-phase flow centrifugal pumps and the key equipment of hydraulic dredgers, mainly used in the infrastructure projects such as dredging in rivers and lakes, construction of ports and waterways and so on.

疏浚泥泵是固液两相流泵的一种应用形式，是水力输送式挖泥船的关键设备，主要用于河湖清淤、港口航道建设等基础设施工程中。

The results show that single structure parameters (width and depth of flow path/passage, and height, and angle of dentations) are local and difficult to represent the anti-clogging ability of emitters. Characteristic structure parameters(minimum size of cross section, hydraulic radius and dentitions spacing) can represent the anti-clogging ability of emitters in a sense. There are anti-clogging critical values under the test. Rated flow Qr and the ratio of diameter of labyrinth passage to diameter of particle η are well cor related to the anti-clogging ability and have anti-clogging critical values too.

结果表明：用单一结构参数(流道宽度 W 、流道深度 D 、齿高度 h 和齿角度θ)表征其抗堵塞性能存在局限性；结构特征参数断面最小尺寸 min(D，W、水力半径 R 和齿间距 l 能较好反映滴头流道横、纵断面的结构特征，在不同程度上表征了流道的抗堵塞性能，且在试验条件下各自均存在抗堵塞临界值；滴头额定流量 Qr 和迷宫滴头径粒比η与抗堵塞性能相关性较好，且存在抗堵塞临界值。

In recent years, although chinas dredging industry has achieved vigorous development, the key equipment such as slurry pumps of large and medium sized hydraulic dredgers are mainly imported from abroad. So it is necessary to study the slurry pump.

尽管近几年来国内疏浚事业有了蓬勃的发展，但目前国内大中型水力式挖泥船的关键设备如泥泵等还依赖于进口或仿制，所以有必要对疏浚泥泵进行研究。

When A〓-A〓-O-A〓 system, using fixed beds as anaerobic and anoxic reators and draft-tube fluidised bed as aerobic reactor (total hydraulic residence time 26. 2h, 9, 5, 7. 2 and 5h for each stage, and recycle ratio of mixed liquor from oxic reactor to the first anoxic reactor 5: 1), is used, the removal rates of COD, NH〓N and TN reach 97, 95. 5 and 90% respectively (influent COD, NH〓-N and TN 1204. 8, 274. 3 and 443mg/l respectvely).

采用A〓-A〓-O-A〓流程和简捷硝化-反硝化过程，以固定床作厌氧反应器和缺氧反应器，以内循环式生物反应器作好氧反应器，系统总水力停留时间为26.2h，各段停留时间分别为9h，5h，7.2h和5h，好氧反应器和第一级缺氧反应器之间的混合液回流比为5：1，系统进水COD为1204.8mg/l，NH〓-N为274.3mg/l，TN为443mg/l时，COD、NH〓-N和TN的去除率分别可达97%、95.5%和90%。

The research in this thesis successfully resolved the downstream energy dissipation and erosion control problem of Yingping water power station, and thoroughly studied the hydraulic characteristics of the training frusta, which offers certain reference values for similar project problems.

该论文研究成果解决了阴坪水电站闸坝下游消能防冲实际问题，并深入探讨了导流墩的水力特性，为类似工程消能防冲问题的研究提供了参考依据。

Hydraulic pressure stimulation of oil and gas well is the main method of stimulation.

水力压裂作为一种改造油气层的重要方法，是油气增产、增注的有效措施。

Hydraulic pressure stimulation of oil and gas well is the main method of stimulation.

水力压裂作为一种改造油气层的重要方法，是油气井增产、增注的有效措施。

Difierent depth measurements were made using a point gauge while velocity measurements were taken using an acoustic doppler velocimeter over a grid defined throughout the junction region in physical model test.

现通过实体模型试验，利用三维超声波流速仪量测不同水力条件下连接井内的流速分布，提出了在连接井内设置品字型墙均流防涡装置的新技术。

Different depth measurements were made using a point gauge while velocity measurements were taken using an acoustic doppler velocimeter over a grid defined throughout the junction region in physical model test. The water diversion and vortex precaution device of "∴"-type diversion walls was developed.

现通过实体模型试验，利用三维超声波流速仪量测不同水力条件下连接井内的流速分布，提出了在连接井内设置品字型墙均流防涡装置的新技术。

This dissertation gives the damping iteration method and geome-tric-mean tracing method, both based on inversion of observed ground-water level data, and also gives the proportional iteration (or ortho-gonalization) method based on inversion of hydrogeologic gradient data.

本文建立了用水位观测资料进行反演的阻尼迭代法和几何均值追踪法，利用水力梯度资料进行反演的比例迭代法。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。