time-varying field

The mathematical model of nonlinear time-varying system includes not only nonlinearity but also time-varying parameters. It has been extensively used in the field of aeromechanics, economy, medicine and construction, and so on.

非线性时变系统的数学模型既包含非线性项，又具有时变参数，是最具一般意义的动力学系统，广泛存在于航天、经济、医学、建筑等学科领域。

By Fourier series expansion of lightning current waveform in time-varying field, analytical formulations in frequency domain are derived.

通过对时变场中瞬态的雷电流波形进行傅里叶级数展开和周期延拓，得到了频域中的雷电电磁场的解析公式。

About theoretic calculation for lightning electromagnetic field, two analytical methods are raised, which are dipole method in time domain and time-varying field method in frequency domain.

在雷电电磁场的理论计算方面，提出了两种方法，即时域中的偶极子方法和频域中的时变场方法。

Constraints of Eddy Current in 2D Time-varying Electromagnetic Field Problems All Changed

二维时变电磁场问题中涡流的约束

The one-soliton solution indicates obviously the spin precession around the magnetic field and periodic shape variation induced by the time-varying field as well.

从单孤子解的表达式可以明显看出自旋绕着外磁场进动，且孤子的形状随外磁场的作用周期性变化。

Introducing the UPF algorithm in the time-varying channel estimation field, A time-varying channel estimation method based on the UPF algorithm is proposed in OFDM system.

将UPF算法应用到OFDM时变信道估计领域中，提出了一种基于UPF算法的OFDM时变信道估计方法。

Numerical Calculation of Substation Grounding Systems in Time-Varying Field

时变激励下接地网模拟计算

New Statement of Uniqueness Theorem for Time-Varying Electromagnetic Field

时变电磁场唯一性定理的完整表述

Study on guidelines for low frequency time-varying magnetic field

低频交变磁场安全性的研究

Objective To study the effect of static magnetic fields and low-frequency time-varying magnetic field on the micronucleus in PCE of the mouse bone marrow and blood analysis.

目的研究稳恒、低频交变磁场对小鼠骨髓嗜多染红细胞（PCE）微核率和血象分析的影响。

It was about the only time I got up the field in the whole game so I was well happy with my goal

这是我在整场比赛中唯一一次上场，所以我对自己的进球非常开心。

But for students who haven't yet done enough research, or who are still constantly changing their minds on favorite schools, the early-decision system needlessly and prematurely narrows the field of possibility just at a time when students should be opening themselves to a whole range of thrilling options.

但是对于那些还没有做足够的研究,或者心仪的学校仍在不断改变的学生来说,提前录取体系不必要地过早缩小了可能性范围,而此时学生们应该向一系列令人兴奋的选择保持开放态度。

Conclusion: Low frequency time-varying magnetic field can promote cellular immunity function in mice.

结论：低频交变磁场能增强机体的细胞免疫功能。

Getting the potential distribution of grounding grids accurately in time-varying field, the analysis of electromagnetic interference may be analyzed.

时变激励下的接地网模拟计算能够较为准确地求得接地网上的电压分布，从而进行变电站内电子设备之间的电磁干扰分析。

In virtue of variation theory, boundary problem of magnetic field is changed into equivalent variable problem. Then the procedure of element analysis, discrete format and collective composition equation in sinusoidal and time-varying field are given.

从待解的磁场边值问题出发，利用变分原理将边值问题转化为等价的变分问题，给出了正弦时变场单元分析过程和离散格式以及最终的总体合成方程。

Magnetic particles also can have resonant response to a time-varying magnetic field with advantageous results related to the transfer of energy from the exciting field to the nanoparticles.

磁性颗粒能在时间变化磁场中产生共振响应，因而能很好地将能量从激发场转移到纳米颗粒中。

The control of large time delay system is one of the research hotspots in control field.

时滞系统的控制是控制领域中的研究热点之一。

Magnetic stimulation ( MS) is a method for stimulating excitable tissue with an electric current induced by an external time-varying magnetic field.

磁刺激是利用时变磁场在组织内产生感生电流，使可兴奋组织产生兴奋的一种无创刺激方法。

A Moment Method of Analytic Solution to Drive Problem on Time-varying Scalar Field

时变标量场激励问题解析解的矩量方法

Materials and Methods: With 50 Hz time-varying magnetic field act on mice, 4 hours every day, after 10 days, the micronuclei rate of mouse bone marrow and blood were determined.

材料和方法：用50Hz交变磁场作用于小鼠，每天4小时，10天后检测小鼠骨髓嗜多染红细胞微核率和血液学指标。

It was about the only time I got up the field in the whole game so I was well happy with my goal.

这是我在整场比赛中唯一一次上场，所以我对自己的进球非常开心。

My dream was sports. By the time I was sixteen, I could throw a ninety-mile-per-hour baseball and hit anything that moved on the field.

我的梦想是运动。到我十六岁的时候，我已经能投出每小时九十英里的棒球，并且能击中场上任何移动的物体。

Induced Electric Field in Time-Varying Magnetic Field

时变磁场中的感生电场