查询词典 permeable

The subsoil must be highly permeable, but it must have a shallow water table or be underlain by an impermeable layer that permits a perched water table to be maintained.

地面一定要相当平整，并且具有小于0.5％的坡度；底土必须是强透水土壤，但是它必须有一个较高的地下水位或在下面铺一个不透水层，以能维持一个较高的地下水位。

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。

The network seepage flow analysis method of rock masses is a numerical method compatible with Block Element Method on the basis of the assumption that the rock blocks are unpermeable while the discontinuities are permeable.

岩体网络渗流分析方法是在假定岩石块体不透水、岩体中渗流仅通过结构面进行的基础上建立起来的一种与块体单元法配套的岩体渗流数值模拟方法。

At the molecular level, Ca enters plant cells through Ca(superscript 2+)-permeable ion channels in their plasma membranes, whereas low [Ca(superscript 2+)] in unstimulated cells is maintained by Ca(superscript 2+)-ATPase and Ca(superscript 2+)/H(superscript +) antiporters.

Ca(上标 2+)通过Ca(上标 2+)通道内流进入胞质，并通过Ca(上标 2+)-ATPase和Ca(上标 2+)/H反向转运蛋白外流以保持胞质内低Ca(上标 2+)浓度。

The key technology of permeable reactive barrier and the principle of zero valent iron remediation were summarized,and the study progress and practical applications were reviewed.

综述可渗透反应墙的技术关键、零价铁修复的原理和PRB的最新进展和实例应用，介绍PRB技术处理地下水的技术优势及存在问题。

A permeable membrane allows visitors to walk from one zone to another, passing through a curtain that flexes and warps.

让游客通过波浪形的半透明的膜从一个区步行到另一个区。

As a new fashion river regulation building, it is necessary to research the effect of pile permeable groins to local flow quantitatively.

作为一种新型河工建筑物，桩柱透水丁坝对局部水流的影响亟需可靠的定量研究。

Based on the combination of the theoretical analysis and flume experiment, the local head loss associated with pile permeable groins is discussed.

为此，结合理论分析和水槽试验对其局部水头损失进行探讨。

First, the mechanism of local head loss is clarified from the theory of plane flow and vortex; and the relationship between local head loss coefficient and barrier-discharge of pile permeable groins is derived.

首先，应用平面绕流与旋涡理论阐明其局部水头损失的机理，导出了桩柱透水丁坝局部水头损失系数与阻水流量的关系式。

Then through combining the experiment data with the existing calculation formula for barrier-discharge, an empirical formula that can be used to calculate local head loss coefficient of pile permeable groins in the non-submerged condition is obtained.

而后利用已有的桩柱透水丁坝阻水流量计算公式结合试验资料，得到了计算单个桩柱透水丁坝在非淹没状态下局部水头损失系数的经验公式，该公式计算值与实测值符合良好，可为透水丁坝水力特性的进一步研究提供参考依据。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。