查询词典 permeability

Methods The model of cerebral ischemia and anoxia in mice was established by decollation and ligating common bicarotid artery the effect of BVF on the survival time of the mice,and the time of catching their breath after mice decollated,and mouse brain capillary vessel permeability were observed. The content of maiondialdehyde,activity of superoxide dismutasein the brain tissues of cerebral ischemia and anoxia mice were measured by TBA,NBT technology respectively.

采用小鼠断头、结扎双侧颈总动脉等脑缺血缺氧模型，观察苦菜总黄酮对脑缺血缺氧小鼠存活时间、断头小鼠喘息时间及脑毛细血管通透的影响；TBA法、NBT法测定小鼠脑缺血缺氧后脑组织MDA含量和SOD活性。

Along with the increase of deepness , to porosity and permeability, mudstone reduce much more than sandstone.

随深度的增加，泥岩孔隙度和渗透率降低的幅度比砂岩大。

The sensor output may be determined by stress changing, inductive loop denseness, magnetic field and magnetic permeability.

在外力缓慢变化的情况下，可通过求感应积分电压得到外力。

Absolute permeability at any given location may change in response to localized changes in stress within the rock pore system owing to depressurization during production.

在任何位置的绝对渗透率，由于生产过程中的减压，可能会随着岩石孔隙系统中应力的局部变化而变化。

Experimental study of depressurization and augmented injection with surfactant of low concentration is carried out in several low permeability oilfields.

在绝对渗透率难以改变的客观条件下，通过改变油、水及岩石间的界面张力，从而改善油、水渗流性，提高水相渗透率，降低低渗透油层注入压力，并在一些低渗透油田开展了低浓度活性剂降压增注试验研究，取得了一定的效果。

Combined with the percolation theory of low permeability oil reservoirs,we derived the function of det...

结合低渗透油藏渗流理论得到了低渗透油藏确定极限技术井距的公式，可为低渗透油田开发确定合理井网密度提供理论依据。

Using the apparatus of high stress and high hydraulic pressure developed by author, a series of tests was carried out, and the expressions of dewater consolidated settlement with hydraulic pressure and coefficient of permeability with efficient stress was obtained.

通过自行设计的高应力、高水压试验装置，进行了一系列的试验，获得了疏排水沉降量与水压变化、渗透系数与有效应力之间的关系表达式；首次对回归系数的主要影响因素从颗粒级配的特征粒径和特性参数入手，进行了系统的分析；得到了压缩模量与水压降的正相关关系式；提出了一种简便、易行的先期固结压力的确定方法，并对深土力学特性进行了初步研究；推导了各种边界条件下Terzaghi 和Biot 固结理论的水头及沉降量的解析解或半解析解；编写了隐式差分

Fractal dimension also reflects the impact of deposit energy distribution and diagenesis on the permeability distribution.

分维还能反映沉积能量分布和成岩作用对渗透率分布的影响。

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。

As is now well known,foundry coating is consist of 5 kinds of basic components such as carrier material,refractory fillings, defocculaing aent, binding agent and accessorial addition agent. In which the refractory fillings is its main components that it decides the refractoriness,chemical stability, diathermancy of the coating ,simultaneously it influences also the gas permeability,sinter delaminating property of the coating.

众所周知，铸造涂料是由载体，耐火填料，悬浮剂，粘结剂和辅助添加剂五种基本组分组成，其中耐火填料为主要组分，它决定着涂料的耐火度，化学稳定性，绝热性，对涂料的透气性，烧结剥离性也有重要影响。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐