It is what is called a dipole field with a north and South pole.
它就是所谓的偶极场——具有一个北极和一个南极。
But occasionally this dipole field switches polarity north and south reverses, and this process seems to take a few thousand years.
但是偶尔这偶极场会转换极性——南极和北极倒转，这个过程似乎需要几千年的时间。
The distribution characteristic of the magnetic dipole field is analyzed based on the propagation equations of underwater electromagnet ic wave.
基于电磁波在海水中的传播方程，分析了海水中磁偶极子辐射场的分布特性。
The characteristics of the self absorption of gyrosynchrotron emission arc-investigated detail and its optical depth is estimated from radio microwave source with a magnetic dipole field.
详细研究了高能电子产生的回旋同步辐射自吸收的特性，并用磁偶极子场的射电微波源模型计算了它的光学厚度。
This paper presents a digital method to calculate the EM response of a three-dimen-tional conducting permeable body which is subjected to an alternating magnetic dipole field in free space.
本文提出一种关于自由空间三维导电导磁体在谐变磁偶极场中电磁响应的数值计算方法。
Hulot's team argues that the growth of these reversed patches, presumably eddies that are working against the primary motion of the core, can explain the current decline in the dipole field.
余洛的研究小组认为，假如此区块是一种与主要地核运动相抗衡的“漩涡”区，那么此区块的增长便可以解释现今磁偶极场的衰减现象了。
The EM response function from a conducting (both electric and magnetic) sphere in a dipole field is calculated by using the continued fraction technique, and the resultant data and diagram are given.
本文利用连分式方法计算了偶极场中导电导磁球体的电磁响应函数，并给出了计算数据及图表。
If we put a dipole that has the freedom to move, we put that dipole in an electric field, it will align itself with the field lines.
若我们将偶极释放到自由空间中，比如说放到电场里，他们会自动排序按同一方向。
A two stage complex image method is proposed to rapidly and precisely calculate the refractive field of an overhead dipole (generalized sommerfeld integral, GSI) in the earth.
为了快速精确计算架空偶极子大地中的透射场，提出了一种广义索末菲积分（GSI）两阶段复镜像等效算法。
Magnetic gradient tensor is that the three components of the magnetic field vector space rate of change, is able to do well for the dipole localization and tracking.
磁力梯度张量表示的是磁场矢量三个分量的空间变化率，能够很好地用于偶极子场源的定位跟踪。
The general formulas of radiation from dipole antenna in a circular waveguide are given by means of dyadic Green's function and field transformation.
本文采用并矢格林函数和场量变换方法，给出了圆形波导中偶极天线辐射的普遍公式。
The atomic dipole amplitude squared squeezing in the interaction system of the two identical two level atoms with single mode vacuum field is studied.
研究了两个全同的二能级原子与单模真空辐射场相互作用系统中原子的偶极振幅平方压缩效应。
The dipole squeezing effects of a three level cascade atom interacting with a correlated two-mode squeezed vacuum field are investigated.
研究了与关联双模压缩真空场作用的级联三能级原子的偶极压缩效应。
Considering the initial atomic coherence and the detuning, dipole squeezing of a two-level atom interacting with squeezed vacuum field is studied by means of the time-evolution operator method.
文中采用时间演化算符，考虑到初始原子相干性及失谐量，研究了单个二能级原子与压缩真空态辐射场相互作用中原子的偶极压缩。
The two-atom dipole amplitude-squared squeezing in a system of a two-mode vacuum field interacting with two coupled atoms was studied.
研究了双模真空场与两个耦合二能级原子相互作用系统的双原子偶极振幅平方压缩。
Approximate theoretical expressions are given for dipole moment, field gradient at the nucleus, and nonlinear susceptibility of crystals.
建立了偶极矩、核四极矩偶合常数中的场梯度及晶体非线性光学系数的近似理论表达式。
Electric Dipole Radiation. The Radiation Field, the Near Fields. Radiated Power. Example: Charge in Circular Motion.
电偶极辐射。辐射场，近场。辐射功率。实例：圆周运动之电荷。
By use of numerical approximation method, the paper USES the polynomial to approach segmentally the transient electric field from dipole dipole array.
本文采用数值逼近的方法，逐段用多项式表示偶极—偶极排列的瞬变电场。
This paper studied the atomic dipole amplitude squared squeezing in the system of a three level atom interacting with a single mode radiation vacuum field.
研究了三能级原子与单模辐射真空场相互作用中原子的偶极平方压缩效应。
The radiation of an electric dipole in an infinite anisotropic plasma medium is analyzed. The near field expression is obtained by pursuing the Fourier transform.
分析电偶极子在无限大各向异性媒质中的辐射场，得出了近区场的级数表达式。
An analytical expression of potential field is derived based on a viewpoint of polarized dipole and electrical current.
导出了基于极化偶极和电流观点的位场解析表达式。
The magnetic leakage field distribution above linear defects of a tube sample under the geomagnetic field was modeled according to magnetic dipole theory.
利用磁偶极子理论，建立稳恒微弱地磁场作用下管类试件线状缺陷段产生的漏磁场模型。
This article calculated out the field intensity of a electric dipole uniformly moving along the axis of the dipole using the transformation relation in the relativistic theory.
本文利用相对论变换关系计算了沿轴线方向匀速直线运动的电偶极子的电场。
In this paper, the simple analytical expressions of the electromagnetic field induced by a vertical electric dipole on the perfect conductor coated with a layer of dielectric medium has teen obtained.
分析研究了垂直电偶极子在介质涂敷的理想导电平面上激起的电磁场，获得了场分量的解析表达式。
With geomagnetic field model records, several kinds of secular variation of geomagnetic dipole moment and the position of the geomagnetic North Pole during the year 0 ~ 2000 a.
利用地磁场模型资料，计算和分析了公元0 ~ 2000年的地磁场偶极子磁矩和地磁北极位置的长期变化。
Results show that the amount of dipole squeezing increases while the duration of dipole squeezing decreases with increasing initial field intensity.
结果表明：原子偶极压缩量随初始光场强度增大而增加，但压缩时间缩短。
This paper got the displacement current about a oscillating dipole and the equation of displacement current line and discusses the property of its electromagnet field.
本文通过计算得到了振荡偶极子周围的位移电流及位移电流线方程。
This article gives a description of a method to ascertain the magnetic field at any arbitrary point of magnetic dipole space by a kind of reciprocity principle.
本文用互易定理，给出一种确定磁偶极子空间任意点的磁场的方法。
This article gives a description of a method to ascertain the magnetic field at any arbitrary point of magnetic dipole space by a kind of reciprocity principle.
本文用互易定理，给出一种确定磁偶极子空间任意点的磁场的方法。
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