渗流

The circumstances under oil wells have been much more complex than ever . Requests on resistance of erosion destructibility of sealing interfaces that related to sealing up and cementing exercises in petroleum engineering are more and more of rigidi ty .

目前国内许多油田已进入开发后期，开采强度不断增大，井下情况更加复杂，对于石油工程中的固井和挤堵作业涉及的封固界面的抗冲蚀破坏性能要求越来越高，迫切需要解决影响界面胶结质量的各种问题，特别是流体渗流条件下的界面胶结强度的建立和保持问题。

The routine design method of the dike dam is, which is borrowed the experience of deviser, followed the relative criteria and requests, and set up the engineering instance after making choices of the dam, to carry on the dam arrangement and figure designation. Then it should carry on the seepage analysis inside the dam and the stable calculation of the dam slope. It also needs to check whether to satisfy the norm request of design, then gets a feasible scheme.

常规的堤坝设计方法是在选定坝址后凭借设计人员的经验，遵循有关规范和运行要求，并参照已建工程实例，进行坝体布置和体形设计，然后进行坝内渗流分析和坝坡的稳定计算，以检查所选的方案是否满足设计规范的要求，如果满足，即得到一个可行方案。

To begin with the phenomenon and characteristics of dezincification of brass, the review is made on the mechanisms, prevention and influence factors of dezincification .

从黄铜脱锌的现象、特征及其影响因素出发，对黄铜脱锌的优先溶解机制、溶解－再沉积机制、双空位机制和渗流机制等进行了描述。

In order to deep holding the engineering characteristic of the coarse-grained soil, this paper researched object that is the coarse-grained soil of the diametre from 0.1mm to 20mm that was often applied in the dam body filter structure, using the experiment method, carrying out the experiment the research of the coarse-grained soil permeability characteristic.

粗粒土在水力作用下，是一种结构极不稳定的土体，在渗流作用下极易发生渗透变形，容易引起坝体的渗透变形破坏。从渗透系数的变化上分析，其渗透变形过程是一个连续的过程，土体的破坏形式大都属于管涌破坏，破坏坡降较小，一般破坏坡降都小于2.5，有的甚至小于1.0。

Therefore, it is meaningful to use the percolation theory to prepare the material with high dielectric constant.

因此，渗流理论对于制备高介电常数聚合物基复合材料是十分有意义的。

The differential equation of unsteady infiltration of anomalous pressure has been established, and presents its dimensionless fashion.

建立起异常高压气藏的不稳定渗流微分方程，并给出其无因次形式。

Hydraulic fracturing is a kind of process engineering that can improve the oil reservoir filtrational property, is an important measure that boosts production of oil field and augments injection of downflow well.

水力压裂是一项改造油层渗流特性的工艺技术，是油气井增产、注水井增注的一项重要措施。

Based on the theories of porous medium seepage and elasticity, the partial differential equations on the response of the well water bearing system to the Earth tide signal are derived under the condition of changing well radius.

根据多孔介质渗流理论和弹性理论，在井孔变径条件下，得出水井含水层系统对潮汐信号响应的偏微分方程，认为井径变化相当于改变了井水柱的有效高度，从而影响了水井含水层系统的固有振动周期。

The stable flow in elastic deformation media is studied.

研究了弹性变形介质变渗透率条件下的稳定渗流问题。

The success rate of porous conductive membrane preparation on fused silica capillary was greatly improved by control of voltage bias and electroosmosis effect.

通过控制电压偏置方向，利用电渗流效应使毛细管多孔导电膜的刻蚀成功率得到显著提高。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。