查询词典 water pressure

At the super-low permeable reservior sandstone of Fu and Yang in Daqing Oilfield, many pore throats exist a lot in the types of compacted and restored flakes and curved lamellas while the pore volume of micropore and the thin, compacted and shrunken throat that contribute little to flow take large scale in the total pore space. Thereof high filtrational resistance is caused by much trouble including high content of reservoir shale, serious sensibility to pressure at waterflooding, remarkable effects of undersaturation and water blocks in micropore. A method with laboratory experiment, theoretical confirmation and field application included was adopted to analyze the non-linear flow characteristics, to reveal the deep mechanism of pinhole enveloping macropore and to provide a new technology of improving the development effect. The outcomes aquired are as follows: Multiple cores with different low and super-low permeability were selected to perform seepage experiments by gas, water and oil. Three fields of flow were observed in the reservoir at different low and super-low core permeability. They are pseudo- elastic flow, transition flow and plastic creep flow. So the concept that there was no correlation of rocky absolute permeability with fluid properties that pasted itself was broken up. Two-phase seepage of water displacing oil in uniform super-low permeability shows that the two-phase seepage zone is narrow.

针对大庆油田扶、杨特低渗透油层砂岩孔隙喉道的大小和形态以压实再生型片状、弯片状喉道分布较广，压实、缩小型细喉道型，微孔不可流动的孔隙体积所占总孔隙体积的比例较大的特点；及储层泥质含量高，注水开发中压力敏感性强、微孔隙欠饱和及水锁效应显著，导致流体渗流阻力增大的问题，本文采用室内实验、理论推证和矿场应用相结合的方法，研究、分析了流体非线性渗流特征，更深刻地揭示出小孔包围大孔的机理及产生原因，并提供了改善开发效果的新的技术方法，取得如下成果：选择不同渗透率的低渗透、特低渗透岩心，进行了气、水和油单相渗流实验，揭示出当岩心渗透率不同时，油层内的流体呈现出拟弹性流变、过渡流变、塑性蠕变三种流变区，从而打破了岩心的绝对渗透率与通过岩心流体性质无关的观点；同类特低渗透岩心的水驱油两相渗流实验表明，两相渗流区较窄。

When the underground water percolates through a soluble rock sequence along its fissure it will dissolve large amount of calcium carbonates and seep out from the sidewalls and the roof. Due to the changes in temperature and pressure, water evaporated and carbon dioxide escaped and the dissolved calcium carbonate in the water precipitated in various forms.

地下水沿着可溶性岩石和裂隙渗透，溶解了岩石中的较多的碳酸钙，通过洞顶或洞壁滴流出来，因为温度、压力的改变，水的蒸发，二氧化碳散失，使溶解在水中的碳酸钙沉淀下来形成各种形态。

The aim to force analysis of high pressure water injection string is to research various effects exerted on water injection string in different phases according to water injection conditions, and how such effects influence string loads and deformations to identify siring working states and ensure string to he efficient and reasonable situations.

进行高压注水管柱受力分析的目的就是根据注水条件研究注水管柱在不同过程中的各类效应，以及这些效应对管柱产生的受力和变形规律，从而明确注水管柱的工作状态，保障注水管柱有效合理地工作。

Hot air cooler 11-20 gauge board flow temperatures gauge board pressure transducers gauge board flow transducers gauge board display water flow in air coolers 1-10 gauge board flow transducers gauge board display water supply for lower oil-cooler gauge board flow transducers gauge board level gauge in upper oil reservoir gauge board water in oil reservoirs gauge board creep detector gauge board bearing insulation

热气冷却器 11-20精确计量董事会流程温度精确计量董事会压力转换器精确计量董事会流程转换器在空气冷却器 1-10 中精确计量董事会展览水流程精确计量董事会流程转换器为较低的油-冷却器精确计量董事会展览自来水精确计量董事会流程转换器标准度量董事会水平在上面的油水库中精确计量标准度量董事会水在油水库中精确计量董事会爬发现者精确计量董事会生绝缘

Try in make clear, hydraulic pressure shovels dredger, grab bucket to shovel dredger construction efficiency instead instead taller, dredge of dredger of grab bucket type shovels type dredger to affect degree small; to wring dredger suction type to water environment than turning over, contain a lot ofas a result of bottom mud sundry, suction inlet jams extremely easily, apply to; of dredge of mud of Suzhou river bottom to undertake to groovy grab bucket environmental protection is transformed hard, the influence of earth of hourglass of leakage of the grab bucket in reducing dredge process significantly to water system water quality, be worth promotion application.

中试表明，液压反铲挖泥船、抓斗反铲挖泥船施工效率较高，抓斗式挖泥船疏浚比反铲式挖泥船对水环境影响程度小；绞吸式挖泥船，由于底泥富含杂物，吸口极易堵塞，难以适用于苏州河底泥疏浚；对常规抓斗进行环保改造，显著减少疏浚过程中抓斗漏水漏土对水体水质的影响，值得推广应用。

This paper analyses and calculates water coal in theory,makes out pressure date calculation formulas about water coal at discretion depth in bunker,provide theory thereunder about intensity and stiffness calculation of devices of water coal .

从理论上对水煤进行静力分析计算，推导出水煤在煤仓任意深度点的压力值计算公式，为水煤设备设计的强度及刚度计算提供理论依据。

Over the past few years, the company and make unremitting efforts to form an automatic sprinkler fire extinguishing system-oriented products, have developed a fixed artillery fire extinguishing systems, foam extinguishing systems, gas fire extinguishing system, such as series of fire protection products, the current main Products are: sprinkler nozzle series, wet alarm series, deluge valve series, the flow indicator series, water spray, water curtain fire sprinkler control valve series series, in particular the PS20 - PS80 fire water cannons, PSKD30 - PSKD60 electric artillery fire control, PHY Series storage pressure of air bubble mixing device, such as the proportion of products in the domestic market by the user's consistent high praise, has great competitive advantage.

几年来，公司经过不懈的努力，形成了以自动喷淋灭火系统为主导产品，相继开发研制了固定消防炮灭火系统，泡沫灭火系统，气体灭火系统等系列消防产品，目前主要的产品有：洒水喷头系列，湿式报警系列，雨淋阀系列，水流指示器系列，水雾，水幕喷头系列消防控制阀系列，特别是PS20--PS80消防水炮，PSKD30--PSKD60电控消防炮，PHY系列贮压力使空气泡沫比例混合装置等产品在国内市场受到用户的一致好评，具有很大的竞争优势。

The plasma ignition threshold of metal is got through experimental and numerical study. The vapour and plasma ignition times of the target are got based on the equation of heat conduction and cascade model. We suppose that the plasma is ignited when generations of new electrons are born in vapour generation time. The influence of temperature on the thermodynamics and optics parameters of material also have been considered in the model. The resulting theory has good agreement with the experiment and overseas report. A blade method to measure the laser spot is given in this paper with validation and error analysis. The plasma threshold of metals in atmosphere and water ambients both are diagnosed with the light deflection and piezoelectric transducer. A Q-switched pulsed Nd:YAG laser operating at infrared (1064nm), visible(532nm) and ultraviolet (355nm) wavelengths has been used. Al、Fe、Cu are used as targets and get a similar results with both method. Theoretical and experimental analyses are applied on the influence of wavelength on the threshold have been done, both of which have shown that the plasma threshold of metals decrease as the laser wavelength increases; The plasma threshold of metals are higher in water than in air and the pressure of the shock wave in water is five times higher than in air .

从热传导方程和雪崩电离机制出发，假设当电子增值210倍时，考虑了温度对材料热力学和光学参数的影响时，得到了气化和等离子体点燃的时间，利用该模型进行计算得到的结果与国内外报道及自行通过实验测得的阈值基本一致；提出了利用刀刃法测量激光光斑面积的方法，并通过实验进行了验证和误差分析；利用光偏转装置和压电换能器分别对空气和水中金属等离子体点燃阈值进行了实验诊断，激光器均为调Q－YAG激光器（波长1064nm，532nm，355nm，脉宽10ns），靶材分别为Al、Fe和Cu，两种测试方法得到的等离子体点燃阈值基本一致；本文从实验和理论计算两个方面讨论了波长对等离子体点燃阈值的影响，均得到了等离子体点燃阈值随著波长的增加而减小的结论；对空气中和水中不同环境下金属等离子体的点燃阈值进行了比较研究，得到了金属在水中的等离子体点燃阈值比空气中的大，且水中产生的冲击波的压强是空气中的5倍左右的结论。

First, the conception of wet compression is defined. A calculation method of moist air and wet gas thermodynamics properties is set up, which treat them as real gas and can give out the results of any water-air/gas ratio. Second, the thesis build the simulation model of water injection between compressor stages of a single shaft gas turbine, based on which the stable analysis is processed and the characteristics of key performance parameters are given out, such as the variation of air flow, pressure ratio, turbine inlet temperature with the water quantities. Results showed that enhancement of power output is outstanding.

文中定义了湿压缩概念，研究适用于计算机计算的湿空气，湿燃气等实际气体的热物性计算方法，利用此法可较准确地计算任意水气比下湿空气，湿燃气的各热物性参数，建立并推导单轴燃气轮机级间喷水热力循环的数学模型，用此模型进行稳态循环分析，并得出级间喷水时燃气轮机各主要性能参数的变化规律，如随喷水量变化，空气流量、压比、燃气初温等的变化规律。

Halophytes are adapted to obtain water from soil water with a higher osmotic pressure than normal soil water, so they need to be able to accumulate a high concentration of salts in their root cells.

盐土植物的渗透压高于土壤，这样就可以从土壤中吸收水分，所以它们的根细胞中积累了高浓度的盐分。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。