水力

The whole basin water reserves are equivalent to the U.S. for more than 14 total. E salmon-rich river .20 30s the U.S. government began to cascade development of the River and integrated management, in the dry and its tributaries, to build a series of dams and power stations, of which the most famous Grand Coulee dams as high as 168 meters long and 1272 m.

全流域水力蕴藏量相当于美国总量的14以上。E河中盛产鲑鱼。20世纪30年代美国政府开始对该河进行梯级开发和综合治理，在干、支流上建立一系列水坝和电站，其中，最著名的大古力水坝高达168米，长1272米。

The countercheck of water resources in Guangxi had been completed after three years of hard work in accordance with the national unified plan.

根据全国统一部署，经过3年的辛勤工作，广西水力资源复查工作已全部完成。

Natural draft cooling tower ; counterflow type ; hydraulic computation of water distribution ; coefficient of resistance

自然通风冷却塔；逆流式；配水水力计算；阻力系数

Results show that P. crispus reduced content of MS, and the longer they stayed with the flow, the greater the effect.

结果显示，菹草系统可以降低水体中悬浮泥沙含量，并随水力停留时间延长而降低程度加大。

It is very difficult to estimate the effect due to such a reduction of cross-sectional area.

模型的糙度是任选的；其他的水力要素，根据滿宁公式按此例求得。

The formula of discharge varying with normal water depth in cubic parabola shape open channel uniform flow and the conditions satisfied by the optimal hydraulic cross-section in the cubic parabola shape channel were deduced according to the theory of open channel uniform flow .

根据明渠均匀流理论，推求了立方抛物线形渠道正常水深与流量关系的计算公式及其水力最优断面所满足的条件。

By using both the hydrogen decrepitation and double-alloy processes to avoid soft magnetic Laves phase,we prepared N35AH sintered Nd-Fe-B permanent magnet with ultra-high coercivity,which can be used at temperature up to 240℃.

现在汽车驱动电机、水力风力发电机、压缩机电机、船舶用大功率推进电机等领域对高使用温度烧结Nd-Fe-B磁体的需求日益增长，所以提高烧结材料的耐热性成为当今钕铁硼行业的主要研究方向之一。

The fresh grass carp sold in market was processed to freezing semi-dry products with low salt and high water through salting, drying, packaging, deepfreeze and frozen storage, and the changes of the water content, the salt content, the water holding capacity and the sensory quality of fish body in the process of frozen storage were studied.

方法］通过腌制、干燥、包装、速冻和冻藏将市售新鲜的草鱼加工成低盐－高水分冷冻半干制品，研究冻藏过程中鱼体水分含量、盐分含量、系水力和其感官品质的变化。

It is composed of ZSFZ wet alarm valve, water-power alarm bell, delayer, pressure switcher, water supply pipe, water sprayer, etc.

系统由ZSFZ湿式报警阀、水力警铃、延迟器、压力开关、水流指示器、供水管网、闭式洒水喷头、报警控制装置和信号碟阀等部件组成。

This paper studies the main geometrical parameter such as angle, height, width, stagger and the upper width in dentation and trapezoid flow path, firstly, uses the single-phase numerical simulation of the computational fluid dynamics technique to analyse the influence of different geometrical parameter on discharge coefficient and flow state exponent of drip emitter. Secondly, uses the two-phases numerical simulation of CFD (1% sand content ) to analyse the influence of the above mentioned geometrical parameter on the contribution regulation of sand and anti-clogging performance. Thirdly, uses the PIV （ particle Tracking Velocimetry ） technique which can see the small-scale flow path to observe and test the trajectories and velocities of solid particles in labyrinth flow path, and analyses the basic factors which can influence the movement characteristic of solid particles and the flow state in flow path.

本文以齿形流道、梯形流道为主要研究对象，以流道转角、流道高，流道宽、偏差量及梯形流道上底宽为主要结构参数，首先应用 CFD 单相流数值模拟技术对不同结构参数灌水器流道水力性能进行模拟，分析了不同结构参数对流态指数和流量系数的影响，其次，应用 CFD 两相流（含沙量为1%）数值模拟技术分析了结构参数对含沙量分布规律和抗堵塞性能的影响，然后，应用 PIV 可视化测试方法测试了固体颗粒在流道内运行轨迹及速度，分析了影响固体颗粒运动特性及流道内流体流态的基本因素，最后，对上述流道结构形式通过模具加工及滴灌带试制，进行了标准化测试（ GB/T 17187-1997 农业灌溉设备滴头技术规范和试验方法与 ISO 标准 ISO /TC23 /SC18 /WG5N4短周期堵塞测试程序），测试结果验证了 CFD 模拟结果，并提出了迷宫结构流道灌水器的抗堵塞设计方法。

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。