查询词典 electromagnetics

Finite-Difference Time-Domain method is a kind of simple and reliable method which is widely used for solving problems related to electromagnetics.

时域有限差分法(Finite-Difference Time-Domain Method，FDTD)是目前较为成熟的应用于电磁计算的时域方法之一。

Summarized the fundamental theory of ferromagnetics, metal mechanics and electromagnetics which is connect to the metal magnetic memory testing.

总结与磁记忆检测技术相关的铁磁学、金属力学和电磁学的基本理论。

First,the knowledge of mechanics and electromagnetics was applied to build the equilibrium equation of thick-walled cylinders'structures,and a solvable equation was obtained utilizing the Laplace transforms and the Hankel integral transforms.

运用力学和电磁场的知识对厚壁圆筒结构建立平衡方程，并通过 Laplace 和 Hankel 积分变换对物理方程进行变换，得到一个可解的方程形式。

Based on the recent research results of solidification, computer, electromagnetics, mechanics and Magnetohydrodynamics, the institute formed a subject-constructive way that crossed multi-disciplinary and characterized by EPM(Electromagnetic Processing of Materials) and computer optimization of solidification.

本研究所积极吸取金属凝固、计算机、电磁学、力学和磁流体力学等学科的近代研究成果，走出了一条多学科交叉的、以材料电磁加工和凝固过程计算机优化为特色的学科建设道路。

The computational electromagnetics have been developed rapidly with the emergence of new schemes in numerical mathematics and physics in recent years.

辛算法在时域电磁散射计算中的应用辛算法，辛P

Finally, the results of RCS computed by physical optics with NURBS models are illustrated, which verify the validity of the modeling method in Computational Electromagnetics.

最后，利用基于NURBS曲面模型的物理光学方法计算目标的RCS，通过结果的分析比较验证了该建模方法在计算电磁学领域中应用的有效性。

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。

The FFT of Helmholtz equation on the regular domain is studied. And the multifrontal algorithm is used to solve the matrix equations in computational electromagnetics.Finally, the finite-difference approximate forms of Maxwell equations and the Despres transmission condition are discussed.

为了充分提高算法的计算效率，研究了规则区域上Helmholtz方程的FFT快速算法，以及有效地将多波前算法引入计算电磁学领域用于求解差分稀疏矩阵方程。

Electromagnetics course mainly including basic phenomena and laws of electro- magnetics, electrostatic field in vacuum, in conductor and in electric medium, electric energy, stabilized current, stabilized magnetic field and its basic laws, electric and magnetic fields caused by a moving chager in lower speed, the transform of electric and magnetic fields between different systems of coordinates, inductive laws, eddy field, self inductance, mutual inductance and transient, molecule current and magnetic substance, ferromagnet, boundary conditions, magnetic circuit theorem, energy of magnetic field and density of magnetic energy, displacement current, Maxwell's equation, electromagnetic wave, Poynting vector.

电磁学课程的主要内容包括：静电的基本现象和基本定律，真空中的静电场，导体和电介质中的静电场，电场的能量与电场能量密度，稳恒电流，稳恒电流磁场的基本定律，运动电荷的电磁场，不同参照系之间电磁场的变换，电磁感应定律，涡旋电场，互感，自感，暂态过程，分子电流与磁介质，铁磁体，边界条件，磁路定理，磁场的能量和磁能密度，位移电流， Maxwell 方程组，电磁波和玻印廷矢量等。

After the preliminary trials and practice,the authors have proposed some new ideas and teaching strategies in implementing bilingual teaching in thermotics and electromagnetics in order to further promote bilingual education in colleges whose focus is directed at teaching.

通过对普通物理双语教学的探索和实践，本文旨在提出在教学型院校进一步推进双语教学的思路和对策。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。