上电

Analytical expressions for electromagnetic fields of a vertical or horizontal electric dipole over the finitely conducting plane are derived subject to the boundary conditions; Sommerfeld type integral contained in Hertz potential is expressed as the sum of two parts: zeroth order Hankel function and an absolutely convergent series of spherical Hankel function.

在此边界条件下，推导出有限导电平面上垂直和水平电偶极子电磁场的解析表达式；赫芝位函数中的索末菲型积分被表达成零阶汉克尔函数与绝对收敛的球汉克尔函数级数之和的形式。

Your PCV absorbed the damage at the cost of some of its power. Keep your PCV charged and your chances of survival in the field are very high.

你的PCV可以通过消耗它的部分能量来吸收伤害，保证你的PCV处于满电状态，你在战场上存活的几率就会大大提高。

It shows that the economics of CCHP increased accelerative with the rising of electric power price at constant price of natural gas.

冷热电联产技术是在热电联产基础上发展起来的，它增加了夏季的热量需求，提高联

Basing on analysis movement rule of celestial body,the author discuss the cause of earth' s special structure formation and the evolvement law,who cites the theorys of gravitation, electromagnetic force, mightiness and acrotism.

本文在分析天体运动规律的基础上，运用引力、电磁力、强力和弱力等四种基本相互作用力的原理，探讨了地球特殊构造的成因和演化规律。

So, Piezoelectric has become a new way to fulfill precision actuation recently.

通过比较和分析，认为压电材料在实现精密驱动上具有相当大的优势。

Experimental result indicated that the physical process of capacity with aging time was identical with analysis of experimental result of dielectric loss.

实验结果表明，试样电容随不同老化条件变化的物理过程与介质损耗实验结果的分析是一致的：电老化对tanδ的影响最大，热老化在一定程度上起了热清洗的作用，导致老化后介损反而降低。

One of my biggest memories of Harvard came in January 1975, when I made a call from Currier House to a company in Albuquerque that had begun making the world's first personal computers.

我在哈佛最难忘的回忆之一，发生在1975年1月。那时，我从宿舍楼里给位于Albuquerque的一家公司打了一个电话，那家公司已经在着手制造世界上第一台个人电

The speed of electrophilic addition reaction of Alkene is well-connected to the nature of substituting group on C=C.

对于烯烃的亲电加成反应速度，与C=C上直接连接的取代基的性质有关。

The study indicated that current and displacement stiffness are constant in the range of allowable engineering error. There is a linear range to the magnetic force. The simplified linear model meets the requirement of controller design. The more precise control precision is, the smaller linear range is.

研究表明，在工程误差允许范围内，位移刚度和电流刚度可视为定值，即此时电磁力方程在应用上存在较大的线性区间，因此简化的线性化模型完全可满足控制器设计的需要，且线性区间随着控制精度提高而减小。

This thesis contributed to the comprehensive study of the Finite-Difference Time-Domain method and its application to the numerical computation of radiated electromagnetic fields in switched mode power supplies. The work includes mainly three parts: the study on the performance of PML absorbing boundary condition applied to pseudo low frequency electromagnetic problems; the validation of the FDTD method with PML absorbing boundary conditions and the corresponding computer software based on the numerical study of the electromagnetic field of an electric dipole antenna, and its application to the numerical computation of radiated electromagnetic fields in switched mode power supplies; the development of an improved alternating direction implicit finite-difference time-domain method.

在综合前人工作基础上，本文对时域有限差分法及其在开关电源辐射电磁场数值计算中的应用进行了系统的分析和研究，其核心内容包括：伪低频电磁场数值计算中PML吸收边界条件性能的研究；基于基准问题—电偶极子天线三维辐射电磁场，验证了本文构造的基于PML吸收边界条件的三维FDTD法及其计算软件，并应用于高频开关电源辐射电磁场的数值分析；提出了一种改进的交替方向隐格式时域有限差分法。

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。