How to construct the electromagnetic field strength tensor by suing two four vector potential is discussed when magnetic charges are presented.
讨论了在磁荷存在时如何用两个四维矢势来构造电磁场张量 ,用所构造的电磁场张量及其对偶张量可以把电磁场的 L agrange密度 ,Maxwell方程、能量 -动量张量等表述更加简洁、更加明显地展示电与磁之间的对称性 ,并展示了其与通常无磁荷时相类似的形式 。
STUDY OF FLUILD UNIT 4D GEOLOGIC MODELING IN TANGJIAHE OIL FIELD,HUANGHUA DEPRESSION;
黄骅坳陷唐家河油田四维地质建模研究
Simulation of Dynamic Path Planning for UAV in 4D Space
四维空间中的无人机动态路径规划及仿真
In this text we used the method of volume integral equation base on tensor Green's function to study the forward of 4D transient electromagnetic response.
本文采用基于张量格林函数的体积分方程法进行四维模型瞬变电磁响应的正演研究,文章中首先说明了四维瞬变电磁法模拟的可行性及程序实现,然后分别设计了两个三维异常体模型(水藏、油藏),采用两种观测方式(激发与接收平行、激发与接收垂直)进行正演模拟计算,并对所得的二次总场的数据进行了分析。
A class of four-dimensional Lagrangian function;
一类四维Lagrangian函数
Shanghai Golden Swell Sanitaryware Co., Ltd.
上海金四维卫浴公司
Four-dimensional space-time defies visualization.
四维空时难以形象表示。
The structure of Liu's calligraphy is tight in the middle and loose on the four sides.
结构中宫收紧，四维开放，
Four-Dimensional Thinking Space for Modulation in Communication Principles;
通信原理中调制技术的四维思维空间
Assay of four vitamins in siweita capsule
四维他胶囊中4种维生素的含量测定
Specified by or exhibiting four dimensions, especially the three spatial dimensions and single temporal dimension of the relativity theory.
四维的，四度空间的由四维确定或表现的，尤指三个空间维度和相对理论中的时间维度
Reflection of English-Teaching on the Language;
从语言的四维性思考英语语言教学—— 一条通往四维世界的链
Application of Four Dimensional Data Assimilation and Three Dimensional Footprint Model in Atmospheric Environmental Study;
四维同化与三维印痕在大气环境中的应用
The Research of Two-dimensional and Four-dimensional Ultrasound Screening for Fetal Congenital Heart Disease
二维和四维超声筛查胎儿先天性心脏病的研究
The Application Value of Three-dimensional/Four-dimensional Ultrasound in Embryo Transfer
三维/四维超声在胚胎移植中的应用价值
four-dimensional form of Maxwell equations
麦克斯韦方程的四维形式
the 4-dimensional coordinate system (3 dimensions of space and 1 of time) in which physical events are located.
物质事件发生的四维坐标系统。
four requirements for plant service
设备维护的“四项要求”
three-dimensional quadrupole mass analyzer
三维四极质量分析器
Argo-Swift alloy
阿戈-斯维夫特四元合金
four stipulations for operation and maintenance of critical equipment
关键设备使用维护“四定”
The Four Quartets:The Essential Change of the Thinking Mode
《四个四重奏》:思维模式的深层转化