查询词典 electromagnetic field

Then direct against the concrete conditions of the oil field of Xinjiang, influencing the important factor that the oil gas operated the cost in the oil field of Xinjiang to be analyzed at first, then analyzing in the face of the domestic and international oil field before combining provide the oil field oil gas in Xinjiang and operate concrete method and measure that the cost controls, and combine the change law of petroleum gas cost in the past 10 years of big company of foreign petroleum Oil field Company oil gas cost control what time does it get helpful enlightenment out of about Xinjiang, providing the incentive mechanism of operating the cost of oil gas of oil field company of Xinjiang to design finally.

然后针对新疆油田的具体情况，首先对影响新疆油阳油气操作成本的重要因素进行了分析，然后结合前面对国内外油田的分析给出新疆油田油气操作成本控制的具体方法和措施，并结合国外石油大公司在近十年的石油天然气成本的变化规律对新疆油田公司油气成本控制提出了几点有益的启示，最后给出了新疆油田公司油气操作成本的激励机制设计。

Experiment results indicate that the magnetic fluid flux has a direct relation with the magnetic field under the effect of traveling wave magnetic field. The bigger the magnetic field is, the more the flux is, when the structure of the magnetic fluid travellig pump and the saturation magnetization of magnetic fluid are constant. The volumes of the magnetic fluid from the travelling wave pump increase from 1.9 ml to 3.1 ml, when the magnetic field intensity increases from 25 900 A/m to 40 000 A/m. In addition, the change rate of the magnetic fluid decreases with the increase of the magnetic field due to the effect of magnetic field on magnetic fluid viscosity. The bigger the saturation magnetization of the magnetic fluid is, the more the flux is.

结果表明，行波磁场作用下的磁性流体流量与磁场的强度有直接关系：在磁性流体行波泵结构和磁性流体饱和磁化强度相同的条件下，磁场强度越强，其流量越大；当磁场强度从25900A/m增加到40000A/m时，单位时间内从行波泵内流出的磁性流体的体积由1.9 ml增加到3.1 ml；随着磁场强度的不断增加，磁性流体流量的变化率由于磁场对其粘度的影响而减小；而磁性流体的饱和磁化强度越大，其流量也越大。

The three dimensional flow field in the triple-screw extruder with triangle configuration is the research objects of this task, including velocity field, pressure field and shear rate field etc., simulate the representative flow field in metering section of the triple-screw extruder, consisted of three-thread element with75mm pitch, has been simulated at the screw speed of 60, 120, 180, 240 and 300rpm and the flowing regulations in flow field and especially the role of the unique center zone affecting to the conveying and pressure generating ability have also been analyzed.

本课题以三角形排列的三螺杆挤出机三维流场为研究目标，研究内容包括速度场、压力场、剪切速率场等。模拟分析首先以螺距75mm的三头螺纹元件为代表，计算由其构成的三螺杆挤出机在60、120、180、240及300rpm转速下的流场，分析流动规律，并分析了特有的中心区在输送、建压方面的作用。

The following are main contents studied: A finite element method for Navier-Stokes equation with ALE formulation is considered and by combined with theNewmark method of numerical intergration a pressure correction scheme is obtained for the solution of the FE formulation of N-S equation. Because the incompressibility condition can be satisfied approximately in this scheme, the interpolation functions of elements can be equalorder for the velocity field and pressure field. In the ALE formulation the fluid-solid interaction analysis became a three-field coupling problem of the fluid field, the solid field and the fluid dynamic mesh. The properties and charactiristices of this three-field coupling problem are deeply discussed.

研究的主要内容有：主容器中流体大晃动是一种强非线性问题，文中研究了求解ALE描述的粘性流体N-S方程的有限元方法，以有利于大晃动自由液面的跟踪和流体大晃动中非线性现象的描述；并结合Newmark数值积分法推出了求解ALE型N-S方程的压力修正解法，由于这种解法可以近似满足不可压条件，因此可以采用速度场和压力场等阶插值的有限元离散格式，从而较好地解决了普遍采用的不等阶插值解法中，速度场和压力场数值精度不一致、程序编制不便等的不足。

We could imagine that the force was balanced by an electromagnetic force generated by the electric charges in the other stars through an electromagnetic field around the stars.

我们可否想象成，这是由于附近其他星体所带电荷，在两星周围产生的电磁场在起作用，抵消了这个力。

Then it discusses the method and problems of designing the Rare-Earth Permanent Magnet Brushless DC motors, and briefly introduces the principles of Finite Element Method for calculating the electromagnetic field as well as how to use the ANSYS software in checking the electromagnetic values.

然后论述了稀土永磁无刷直流电机设计的方法和需要考虑的问题，并对电磁场计算有限元方法的原理作了简要介绍，以及如何用ANSYS软件对电机进行电磁场数值校核。

Second, proceeding with the fact thatthe constructing vector wave functions of conventional circular cylindrical and sphericalvector wave functions are linear independent solutions to the electromagnetic field waveequations in biisotropic medium,spectral impedance boundary conditions are proposed forinfinitely long perfectly conducting circular cylinder and sphere coated with biisotropic media,respectively,which generalize the applicable range of planar structures and are suitable toanalyze the electromagnetic problems involving their counterpart structures.

所用的方法是在Fourier变换谱域中的一阶线性微分方程组理论和矩阵技术，提出了适用于Chiral媒质半空间辐射问题的耦合镜像原理(即镜像电流的振幅和相位是由Chiral媒质中的本征左、右旋圆极化波相互耦合来确定的)和适用于研究平面分层Chiral媒质电磁问题的一般性更高的分析方法。

Based on the CST 3D electromagnetic simulation software, a CAI software of electromagnetic field and wave is developed.

基于CST三维电磁场仿真软件，编制开发了电磁场与电磁波电化教学库。

Circuit principles, analogue circuit, digit circuit which laid me a solid foundation of circuit for the study of communication; the study of electronic circuit of communication provided me with the working principles of analog communication system; the study on communication theory made me grasp the working methods of digital communication; the study on electromagnetic field, electromagnetic wave and aerial let me know that how signals travel through signal paths and how to apply signal and linear system, random signal and system to the research of noise's impact on signals

学习了电路原理、模拟电路、数字电路打下了学习通信的电路基础；学习了通信电子线路掌握了模拟通信系统的工作原理；学习了通信原理掌握了数字通信的工作方法；学习了电磁场与电磁波、微波与天线了解了信号如何在信道中传输；学习了信号与线性系统和随机信号与系统来研究噪声对信号的影响。

A novel moving coil electromagnetic valve actuator was presented,and a coupling system model was developed from three points of view: electric circuit, electromagnetic field and mechanism.

建立了电、磁和机械耦合的系统模型，研制了样件并实测了样件的静态驱动力特性，并对电磁驱动气门的动态特性进行了仿真。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。