It also shows that two four vector potential can be combined into one four vector potential in the region being free of magnetic charges.
同时还证明在磁荷为零的区域两个四维矢势可以合并为一个。
The four vector control methods of induction machines are introduced . Their merits and drawbacks are analyzed . And it indicates that they are applied in different occasion.
介绍了四种异步电机矢量控制方法，分析了各种方法的优缺点，指出各种方法的适用场合。
When creating animations it USES four types of layers: vector graphics, bitmap, sound and camera.
它用四种类型的图层来创建动画：矢量、图形、位图以及声音和照相机。
I have used a Suunto Vector for the past four years.
我过去四年一直在用一块Suunto Vector。
An expression that is the sum of a real number and a vector and that contains four terms, one real and three imaginary.
四元数一实数和一矢量的和的表达式，有四个项，一个为实数项，另外三个为虚数项。
From the angel of four dimensions vector and physics observation, this paper discusses the coordinate transform relationship between the relative movement inertia reference frames.
文章从四维矢量、物理观测的角度出发，就相互运动惯性系之间的坐标变换关系进行讨论。
The relations between particle four current vector, normalization condition and distribution function are analysed.
通过规格化条件讨论，分析了统计分布函数与四维粒子流矢量间的关系。
In this paper, the control points are calculated based on the curve or surface's data points and the knot vector which is calculated with four kinds of parameterization by the method of NURBS.
文中根据曲线曲面型值点，分别用四种参数化方法构造节点矢量，利用NURBS方法反算控制点。
Moreover, four kinds of generalized vector quasi-variational-like inequalities, which are the generalization of vector variational inequalities, are defined and studied.
定义四类广义向量拟似变分不等式，并给出它们解存在的充分条件。
In this paper, four neural networks, i. e. multi layer perception, radial basis function, learning vector quantization and self organizing feature mapping, are used to segment the flame image.
本文研究了多层感知器、径向基函数网络、学习向量量化网络和自组织特征映射网络等四种神经网络在回转窑火焰图像分割中的应用。
Results Fiber-mutant adenovirus vector showed a notably enhanced gene expression in four different tumor cells compared with that of conventional ones.
结果：与野生型腺病毒相比，重组腺病毒能显著地提高目的基因在四种不同肿瘤细胞中的表达。
This paper presents a decoupled control scheme for three?phase four?leg inverter through an inner current regulator based on space vector cascaded with an outer synchronous frame PI controller.
该文提出了一种采用内环空间矢量电流调节器和外环同步坐标比例积分控制器相级联的三相四桥臂逆变器的控制方案，实现了对三相四桥臂逆变器的解耦控制。
A novel space vector control strategy is proposed for four-leg three-level shunt active power filter (APF).
提出一种新型的四桥臂三电平并联有源电力滤波器(APF)的空间矢量控制策略。
Secondly, we investigate the energy density produced by a state vector which is the superposition of three single electron states in the Dirac field in the four-dimensional Minkowski spacetime.
然后，研究了在四维平直时空下三个单粒子态构成的量子态的负能密度。
The main four-chamber engines designed by V. P. Glushko and new control engines from s. P. Korolev for controlling the thrust vector were installed in these units.
这些子级上安装了瓦·彼·格鲁什科设计的四推力室主发动机和谢·帕·科罗廖夫设计的用来控制推力矢量的新型姿态控制发动机。
By defining four dimensional 'deformation event', the spring's equation about deformation and elasticity becomes perfect covariant 4-vector one.
在严格定义四维“形变事件”后，弹簧的形变—弹力方程被表达成完全协变的四维矢量方程。
By defining four dimensional 'deformation event', the spring's equation about deformation and elasticity becomes perfect covariant 4-vector one.
在严格定义四维“形变事件”后，弹簧的形变—弹力方程被表达成完全协变的四维矢量方程。
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