查询词典 hydraulic drive

The hydraulic characteristics of transverse axis vortex behind the sill of the dissipater are studied with the hydraulic test.

通过水力学试验方法，对跌坎式底流消能工坎后横轴漩涡的水力特性进行了初步研究。

The results show that this kind of roughening elements can possess a wide range of roughness, and the hydraulic resistance decreases with the increase of space between roughness elements, but reduces slowly to a constant, and that flow enters into the turbulently rough zone when Reynolds number reaches about 3 500, in which the hydraulic resistance decreases with increase of relative submergence degree, reducing slowly to a constant too.

通过水槽试验对Y型加糙体阻力特性进行了深入研究。研究结果表明：其糙率具有一个较大的调整范围，且随着加糙间距的增加水力阻力减小，减小的幅度越来越小，最后基本不变；雷诺数在3 500左右水流进入阻力平方区，进入阻力平方区后，随着相对淹没度的增大水力阻力减小，最后达一定值。

It\'s possibly that increase of hydraulic limitation with tree height influenced leaf water potential and turgor as well as leaf structure,which strengthened hydraulic limitation on leaf gas exchange characteristics including photosynthesis and transpiration rate, resultantly influenced carbon assimilation and CO_2 fractionation and increased water use efficiency and drought resistance capability.

应该是水力限制影响了叶片的水势和膨压、同时造成叶片的结构发生改变，而结构的改变加剧了水力对气体交换的限制、影响了光合碳同化以及对CO_2的分馏效应、使叶片的水分利用效率和抗旱性增强。

To solve the problems in present hydraulic calculations of gas pipe network such as numerous data-inputting, unprecise output and a lack of hydraulic calculation methods to keep consistent with steady flow and non-steady flow in real working conditions of gas pipe network, in the paper the author has set up a mathematical model of heat transfer process of gas in pipes on the basis of thermodynamic basic theories and obtained more accurate calculation methods of gas storage quantity in long conveying pipes and urban pipe network of high pressure. This research achievement has been applied to real pipe network.

本文研究目的是解决目前燃气管网水力计算中存在的诸如输入数据繁琐、计算精度不高、缺乏符合实际燃气管网工况的稳定流及不稳定流管网水力计算方法等问题，试图根据热力学基本理论建立燃气在管道中传热过程数学模型，给出较为精确的长输管线及城市高压管网储气量的计算方法，并将研究成果应用于实际管网运行中。

Electrical Heating Upsetter; Air Hydraulic Flash Butt Welding Machine; Automatic Air-Hydraulic Pressure Seam Welder; Multi-...

双座电气加热挤压锻缩机；空油压式闪碰焊机；自动空油压轮焊机；多点式网类焊接机；螺母及螺丝自动。。。

Both the linear term and nonlinear term of hydraulic gradient representing the energy dissipation due to inertia force and viscous force respectively are increasing with the increase of specific discharge. At the same time, the portion of nonlinear term in hydraulic gradient increases continuously.

此时，水力梯度中以黏性力和惯性力消耗能量为主导的渗透流速线性项和非线性项均逐渐增大，同时非线性项占水力梯度的相对比重随流速的增大而不断增大。

Based on the integral hydraulic model test of SHANGHAI CHANGQIAO waterwork s water-transport pumping station,some research on the hydraulic characteristics of the pressurized forbay has been done in the paper.

本文基于上海长桥自来水厂改造工程送水泵站整体水力模型试验，对有压前池的水力特性进行了研究，研究的主要内容如下： 1、无导流措施的有压前池在不同供水组合及不同机组开机组合条件下的水力特性，并分析了流态较差的原因； 2、加设导流墩后有压前池的水力特性，以及加设导流墩流态改善的原因； 3、有压前池进气临界条件的试验研究； 4、水泵进气以后水泵性能的讨论。

The article produces the situation of the market according to real work circumstance and domestic weather strip, the hydraulic pressure crock of system of hydraulic pressure of product line of diagonally steel numerical control is sealed undertook optimizing designing, logical choice weather strip, reached weather strip service life long, reduce the maintenance rate, result that improves efficiency of whole platform equipment and performance thereby.

文章根据实际工作情况和国内密封件生产市场的情况，对角钢数控生产线液压系统的液压缸密封进行了优化设计，合理选择密封件，达到了密封件使用寿命长、降低维修率、从而提高整台设备效率和性能的效果。

Through researching the mechanism of biological nitrification and denitrification and actual project application of the technology and related literature materials, the obtained results are as follows:(1) Anoxybiosis is effective to the removal of COD; after the anoxic process, BOD/COD of the outflow increases, it shows that the degradation ability of wastewater is improved; anoxybiosis is insensitive when shock loading of inflow wastewater varies greatly;(2) It is demonstrated by the operation of inoculation and cultivating that biofilm takes two weeks to succeed in cultivating on packings and the removal ratios of NH3-N and COD get 50% and 70% respectively, when gas-water ratio is 6:1, HRT is 7.3 hour, water temperature is above 15°C;(3) It is demonstrated that gas-water ratio, hydraulic loading, HRT, temperature, pH etc are important factors which influence the removal effect of pollutants, when the gas-water ratio is 6:1, hydraulic loading is about 0.38kgNH3-N/m~3.d, water temperature ranges from 15°C to 27°C, pH ranges from 7.5 to 8.0, the BIOFOR removal effect of pollutants is the best;(4) The operation indicated that, this technology has strong ability of nitrification and denitrification; it has extremely vital significance for reducing the water body eutrophication;(5) It is confirmed the feasibility and the usability of preanoxic-BIOFOR process to treat L-lactic acid production wastewater. The experiment indicated that the treatment effect of this technology is very good and also shows that the technology has many advantages, such as small volume, high treatment efficiency, good effluent quality and strong endurance to load variation, this technology is a new and economical wastewater treatment process.

通过对生物脱氮机理的研究和该组合技术的实际工程应用，并结合有关文献资料，取得如下结论：(1)预缺氧池对L-乳酸生产废水中的COD去除具有一定的效果；废水中难降解的高分子物质经过缺氧工段分解为易于氧化降解的物质，浮状有机物在水解菌的作用下，将不溶性有机物水解为溶解性物质；预缺氧池具有较强的抗冲击负荷能力；(2)BIOFOR接种挂膜过程表明：HRT为7.3h、气水比为6：1、水温保持在15℃以上，经过半个月生物膜即以形成，NH_3-N和COD的去除率分别达到50％和70％左右；(3)研究表明：气水比、水力负荷、HRT、温度、pH等是影响污染物去除效率的重要因素，在气水比为6：1，NH_3-N容积负荷为0.38kgNH_3-N／m~3·d，温度在15℃-27℃，pH在7.5-8.0之间的条件下，BIOFOR对污染物的去除效率达到最佳；(4)运行表明，该组合技术具有较强的脱氮能力，对于减少水体富营养化具有十分重要的意义；(5)经过半年多实际工程的现场调试与运行，验证了利用预缺氧—BIOFOR组合工艺处理L—乳酸生产废水的可行性和实用性，得出该组合技术具有占地面积小，处理效果好，运行费用省，耐冲击负荷能力强等优点，是一项新型、经济的污水处理技术。

Through the comparative analysis that: the arc-tooth flow of hydraulic performance is better than the arc, Adopting optimize the design parameters of the structure, reducing the flow rate of 0 regions, and strengthen vortices regions, improved irrigation arc tooth for hydraulic performance and anticlogging ability, irrigation design recommended by arc-tooth flow structure.

通过对比分析认为：弧齿形流道水力性能优于弧形流道，可以通过结构参数优化设计，减小0流速区域，强化旋涡区，提高弧齿形灌水器的水力性能与扰堵塞能力，灌水器设计中推荐采用弧齿形流道结构形式。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48