介质

There are gaps among the crystal structures. In order the micro_object to be a continuum, a close-packed Wigner-Seitz model is put forward by the object structure principle.

针对Hamaker理论在工程实际中存在的问题，从物质结构出发分析晶体结构，发现晶体结构存在空隙，Hamaker连续介质假设不成立。

Excretion by way of points: medium discharged through a pipe called a closed, directly into the air called open type.

按排泄方式分：介质通过管道排走叫封闭式，直接排向空中叫敞开式。

ERT is particularly suitable for the two-phase (or multi-phase) flow applications having a conductive continuous phase, and is able to provide 2D/3D visualization information of the parameters of a multi-phase mixture flowing inside a closed pipe or vessel.

电阻层析成像技术是近年来发展起来的一种基于电阻传感机理的过程层析成像技术，适用于两相流中以导电性介质为连续相的工业过程，可提供封闭的管道或过程容器设备内部多相组分物质参数的二维/三维可视化信息，具有非侵入、响应速度快、成本低、安全性能好、适应范围广等优点。

A two dimensional model approach for the photodetachment dynamics of closed shell an-ionic systems in presence of external light field have been proposed in the context of polar environmental media.

利用外部光场，采用二维模型的方法研究了闭壳阴离子系统在极性溶剂环境介质中光解动力学过程。

But ECT technology has the following characteristics: 1 the measured capacitance and its change induced by the measured material concentration variation are very small, but the stray capacitances of co-axial screening cable and CMOS switches are relative very large, so the capacitance detecting is easily affected by the stray capacitances, 2 the electric fields in the sensors detecting region is affected by the permittivity distribution, non-uniformity of the space responsive sensitivity is very high, and the image reconstruction is undetermined.

但由于ECT技术中，首先所检测的微电容量及其因物流相含率的变化所引起的变化量很小，而由相关的连接同轴屏蔽电缆与切换CMOS开关所引入的杂散电容远远大于测量电容，微电容的测量容易受杂散电容等的影响；其次，多电极电容传感器测量区内的电场受介质分布的影响，且测量区内的空间响应灵敏度极不均衡，其影响图像重建的不确定性；其三，ECT中的图像重建，由于其是一个欠定问题的求解，在迭代求解方法中，迭代的初值影响迭代过程收敛到近似解的速度；其四，对于气/固两相流应用而言，由于ECT系统在线标定的难以实现，管壁磨损等因素的影响制约该技术应用于生产工艺中气/固两相流的长期连续检测。

Water, coal measures and salt have densities markedly different from other earth materials.

水、煤和盐的密度与其它介质有很大的差别。

The corrosion rate of metal increases as rise of coalification of coal in the same other cases.

结果表明，在中性介质中与煤接触的碳钢的腐蚀速率与煤的煤质有很大的关系。

Coaxial cable has its main transmission medium, but most of the new installation uses the twisted pair.

同轴电缆曾是它主要的传输介质，但现在大多数新的安装使用了双绞线。

When the chirped pulse with area smaller than propagates in the medium, splitting doesn't occur and the chirped pulse evolves gradually to an approximate normal Gaussian pulse (C=0), and this characteristic doesn't vary when the chirp coefficient; however, variation of the chirp coefficient will change amplitude and group velocity of the pulse.

面积小于的啁啾脉冲，在介质中传播时不发生分裂，且啁啾脉冲逐渐演化为一个近似的无啁啾(C=0)脉冲，这一特点不随啁啾系数的改变而改变；但啁啾系数的变化将改变脉冲的振幅和群速度。

Through the theoretical analysis of the diffusion coefficient of oxygen in crashed coal, its calculation formula was obtained .

根据松散介质中气体扩散的理论分析，得出了松散煤体中氧气等效扩散系数的理论计算公式。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。