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An MR element is a resistance element whose resistance characteristically changes depending on the strength of the magnetic force.

何一个因素是一个阻力因素，其阻力特性的变化取决于国力的强大磁力。

Three moment method,the transition matrix method and finite element method in shipping shaft system alignment are used ,the application of finite element method in shipping shaft system alignment is proved to be more reasonable through an example .

并以某实船为例，利用三弯距法、迁移矩阵法和有限元法对船舶轴系进行校中计算，说明有限元法更先进合理。

The fluid film bearing-flexible rotor nonlinear system with squeeze film damper is modeled practically using the finite element method and the Hamilton principle.(3) The film forces produced by fluid film bearing and squeeze film damper are determined by finite element method at any moment, and the Jacobian matrix is also determined.(4) A method for analyzing the dynamics of a large system with local nonlinearities is presented. The stability and bifurcation of the equilibrium position and the unbalance responce of a fluid film bearing-flexible rotor system with squeeze film damper are investigated based on the assumption of an incompressible lubricant together with the long bearing approximation for fluid film bearing, short bearing approximation for squeeze film damper and the"π"film cavitation model.

主要研究内容包括下面几个方面：（1）对挤压油膜阻尼器-滑动轴承-转子非线性动力系统中的非线性现象进行了机理方面的研究；（2）应用有限元方法及Hamilton原理对复杂的挤压油膜阻尼器-滑动轴承-转子非线性动力系统进行了建模分析；（3）对滑动轴承及挤压油膜阻尼器中任一时刻的油膜力及相应的Ja-cobi矩阵的确定进行了分析；（4）对一类具有局部非线性的多自由度动力系统，提出了一种可以有效地分析其动力特性的方法；（5）采用实验与理论分析相结合的方法，对挤压油膜阻尼器-滑动轴承-转子非线性动力系统的动力特性进行了分析。

The documentary is various art element creation effect , union seeing and hearing draws art being an integral whole, with definition , music , scene sound , primitive tableau, the scene is reproduced waiting for a variety of means to come to reflect the objective true event , come to show story be rich in content, development of personage story line , in the process of the element handling various art, discover a little new problem , new view and neodoxy , leave vast imagination space to person.

内容提要：纪录片是多种艺术元素的创作效果，并集视听声画艺术为一体，以解说、音乐、现场声、原始画面，情景再现等多种手段来反映客观真实事件，来表现故事内容，丰富人物故事情节的发展，在处理多种艺术元素的过程中，发现一些新问题、新见解和新观点，给人留下广阔的想象空间。

A constitutive equation of the porous media is obtained in the coupling processes. According to the coupling model, a decoupled method is presented. The finite element equation is set up under several conditions and an object oriented finite element program is compiled.

推导了多孔介质在耦合作用下的本构方程，对于耦合模型提出了解耦方法，推导了不同边界条件下的有限元方程，并作为依据编制面向对象的有限元程序。

A switching mode power supply with an active load detection function which supplies AC power input to a primary coil of a transforming element, then to a secondary coil of the transforming element, and then rectifies and outputs the AC power is provided.

要約 本发明提供了一种具有有源负载检测功能的切换模式电源，用于向变压元件的初级线圈、然后向所述变压元件的次级线圈提供交流功率输入，然后整流和输出所述交流功率。

In Laplace space, the exact element stiffness matrix of the axial, torsional and bending vibrations of cone-shaped and symmetrical closed thin-walled bars are derived. By use of variation principle, the element stiffness matrix of the coupling vibrations of an asymmetrical closed thin-walled bar is also given.

在拉氏空间中导出了锥形杆件和对称闭口薄壁杆件的轴向、扭转和弯曲振动的精确单元刚度矩阵，应用变分原理也给出了非对称闭口薄壁杆件耦联振动的单元刚度矩阵。

By using Visual Basic, based on NASTRAN finite element analysis, this paper developed an efficient and convenient software which can process automatically the result of NASTRAN analysis and establish the database, and compute the failure probability of structural element and system, plot the contour of failure probability.

在NASTRAN有限元分析结果的基础上，以Windows95为开发平台，以VisualBasic为开发工具，开发了一个效率高，使用方便的结构可靠性分析软件该软件可以自动处理NASTRAN的计算结果，建立数据库，计算结构单元和系统的失效概率，绘制结构失效概率分布云图等，为工程人员在有限元计算的基础上进一步进行可靠性分析提供了一个方便、快捷的工具

For the raft, an isoparametric element method and VoigtKelvin model are adopted, which can be used to derive viscoelastic element stiffness matrices, a reform of successive approximation of Rayleigh Quotient is used to solve the eigenvalue problem of the composite structure.

对于筏架结构，采用Voiget-Kelvin模型及等参元法，推导了约束阻尼层单元的刚度阵及将Rayleigh商的迭代步骤加以改进的方法来进行特征分析；对于艇体结构与声学介质耦合部分，采用艇体结构的"干"模态作坐标变换。

A statistical optimization method for the design of a fluorinated polyimide wavelength division element for optical communications is proposed. The optimized device is an interleaver element suitable for dividing over 40 wavelengths in the 1550 nm band.

提出并采用统计优化的设计方法解决含氟聚酰亚胺波导波长交叉分离耦合器的偏振态变动的影响。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。