等势

In general, both improving uniform current distribution and the effect of coercive equipotential nodes always contradict each other.

通常，提高电流分布的均匀性和强制等势点的影响是相互矛盾的。

It is common knowledge that the first cells formed during mammalian ontogenesis have embryological equipotentiality.

在哺乳动物的个体发育期间第一细胞形成有胚胎学等势是平常普通的常识。

In this paper a method for EIT electrode structure and parameter optimizing design,taking example for compound electrode,has been presented,which is based on the coercive equipotential node model of the line electrode.

本文在线电极强制等势点模型的基础上，以复合电极 EIT电极系统是整个EIT系统最为敏感和关键的部分之一。

We have obtained the exact solution of the electrical potential functions and power line functions and plotted the relative equipotential line maps and power line maps ;Meanwhile, we have made the necessary discussion.

对偏心圆柱面带电导体和分离圆柱面带电导体这两个不同边界问题的静电场进行了统一的描述，严格地求出了电势函数和电场线函数，作出了相应的等势线簇图形和电场线簇图形，并且进行了必要的讨论。

The main work can be summed up as follows: Firstly, we studied the thermal-field properties of VCSELs, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. Secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of VCSELs, and then studied the influences of the oxide-confining region with different position or thickness, and the different sizes of the gain-guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. Thirdly, we realized the coupling of electricity, optical and thermal-fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, Fermi levels and optical-field. Finally, we gave the equipotential line distributions with considering N-DBR and double oxidized-confining regions, and analyzed theinfluences of N-DBR and double oxide-confining regions on the distributions of the current density, carrier concentration, temperature and optical-field.

具体工作可以概括如下：首先，研究了VCSEL的热场特性，分析了电流扩展，材料参数和工作条件对于温度分布的影响；其次，从电极电压入手，计算出激光器中的等势线分布，并对不同深度处的电压和电流分布进行比较，研究了高阻区的不同位置和不同厚度、限制层和出射窗口半径的大小对电流密度、载流子浓度和温度分布的影响；再次，实现了电、光、热耦合，求出了阈值电压，计算了不同偏置电压下的电流密度分布、载流子浓度分布和热场分布，分析了温度和载流子浓度变化对折射率、费米能级和光场的影响；最后，给出了考虑N-DBR和双氧化限制层时激光器中的等势线分布，分析了N-DBR和双氧化限制层对VCSEL电流密度、载流子浓度、温度和光场分布的影响。

Therefore, borehole wall stability is systematically studied by applying multidiscipline, such as improving the basic theory of drilling geomechanics, precisely processing seismic profile, testing palaeomagnetic stress with core, computer simulation of equipotential surface of formation stress, and predicting stable period by core soaking.

为此，开展了系统研究工程，进行多学科、多角度的钻井井壁稳定性研究，即改进钻井地质力学的基本理论研究、精细化处理地震剖面图、岩心的古地磁应力测试、地层应力等势面的计算机模拟，井下岩心浸泡进行稳定周期预测等。

The enhancement of conductivity is due to the local concentration of equipotential lines when conductive current is dominant at high frequencies.

等效介电常数的增强是由于等势线在传导电流为主导时在局部汇集引起的；等效电导率的增强是由于等势线在位移电流为主导时在局部汇集引起的。

The electric field lines are perpendicular to equipotential surfaces, and go from higher potentials to lower ones.

电场线跟等势面垂直，并且由电势高的等势面指向电势低的等势面。

But due to the difficulties of the theoretical calculation and the limitation of the technique of image display, only some two-dimensional graphs of electromagnetic field of a planar set of point charges or symmetrically and uniformly charged bodies, which ignores the boundary effect, are introduced in the present electromagnetics teaching materials.

然而，由于受理论计算和图象显示技术等因素的限制，目前的电磁学教材中，通常只能给出平面分布的点电荷系或具有较强对称性、忽略边界效应的带电体的电力线和等势线的二维平面图。

Potential and activation map play an important role in the cardiac electrophysiological research.

等势图和等时图在心脏的电生理研究中有着非常重要的作用，可以为进一步研究心脏电活动的特性，心脏电传导的折返现象等提供有价值的资料。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。