电磁

Taking the magnetic field of magnetic levitation ball control system as an example,the FEM analysis method for the axial magnetic field have been described, which in nonlinear on the base of analysis of the principles of electromagnetic suspension control system.

在分析电磁悬浮控制系统基本原理的基础上，以磁浮球控制系统的磁场为例，论述了轴对称非线性磁场的有限元分析方法，建立了有限元方程，应用二维磁场有限元软件对在不同的悬浮气隙下的磁场吸力进行了精确的计算。

In this paper, the magnetic field of tube electromagnetic bulging with axisymmetric coil is investigated by numerical simulation method.

成形线圈设计是电磁成形工艺的关键技术之一，而设计线圈的理论依据之一是线圈受力分析。

Its purpose is to seek the law of the target RCS varying according to its azimuth.

首先简要评述前人在目标电磁散射特性以及目标识别领域的研究方法和途径。

When a rotating voltage vector is injected to the motor at standstill, there is a microinching when the voltage phase is line to the direct axis of the motor. Then the current will decrease due to the back electromotive force. The initial mover position is identified by this change.

电压相位和电机直轴重合时，产生的电磁推力超过负载阻力，电机有一微动，由于反电势的作用电流就会降低，通过检测电流矢量的变化来估计动子的初始位置。

Improvement of MT migration tomography technology Based on the immanent relationship between tomography purpose and suitable frequency segment selection, we raise an entire frequency segment multi-parameter tomography scheme of MT finite difference migration. We establish a mathematical relationship among apparent electromagnetism reflectance, migration reflectance, background resistivity and the true resistivity distribution. After the introduction of TE/TM mode superpose rate, we carry out the associated resistivity tomography of two polarization mode to adapt the practical data interpolating situation.

大地电磁偏移成像的改进：针对频段选择和成像效果的内在关系，提出全频段、多参数有限差分偏移的解决方案；构建视反射系数、偏移反射系数、背景电阻率与实际电阻率分布的数学关系实现偏移电阻率成像；同时引入TE、TM模式加权因子以实现两个模式的联合偏移电阻率成像，更好的适应解释工作需要。

This paper introduced a field dynamic balancing method for the rotor suspended by active magnetic bearing s.

介绍了对电磁轴承-挠性转子系统进行本机动平衡的方法。

A Pentagon report this year on China's military forces said baldly that the country was developing tactics to achieve "electromagnetic dominance" early in a conflict.

今年五角大楼出具的一份关于中国军力的报告明确指出：中国正在发展相应策略，以便在斗争中尽早取得"电磁优势"。

Main structures of plenum pulse bag type collector are as followers: box body and bag compartment, dust store bin, wind inlet and outlet (including screw conveyer and cinder valve), ladder, baluster, air passage system (including offline pneumatic cylinder, electromagnetic pulse valve, compressed air bag), de-dusting controller and so on.

气箱脉冲式袋除尘器的主要结构是，主体由箱体和袋室，灰斗、进出风口（包括螺旋输送机和卸灰阀），爬梯、栏杆、气路系统（包括离线气缸、电磁脉冲阀、压力气包等）、清灰控制器等。

Using a method for storing the large-scale sparse matrix with varying band width, Cholesky decomposition, Green function and normalized least square fitting inversion, the paper improved the computing accuracy and efficiency in imaging calculation.

利用有限元方法实现了井间电磁成像，为了求取散射电磁场的积分方程组，运用了处理大型对称变带宽方程组的 Cholesky 分解法，反演时使用了格林函数和最小二乘法，既提高了反演速度又提高了反演质量。

As a result radiate of pulse of electromagnetism of 6 × 104V/m causes nerve of area of bandicoot sea horse dash forward touch a structure to destroy, amount decreases.

概要： 目的探究电磁脉冲辐射后大鼠海马的超微结构改变以及损伤相关因子的表达情况。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。