结构方程

Combining the functional analysis method with the heat conduction differential equations the finite element mathematic modal as the solution to the period cyclic symmetric structure temperature field was constructed.

试验研究了SiCp_A356复合材料在20℃～450℃之间的拉伸力学性能、循环应力应变响应以及应力松弛行为，以经典的弹塑性增量理论作为塑性模型、以经典的Dom幂率方程作为蠕变模型，引入温度效应，建立了适用于制动盘结构分析的热弹塑性-蠕变本构模型。

This article introduced structure and testing pressure course of steel pipe hydrotesting machine,and set up oil and water balance equation between main oil cylinder pressure and water pressure of hydrotesting machine.

介绍了钢管静水压试验机的结构及其试压过程，建立了静水压机主油缸压力与钢管静水试验压力之间的油、水平衡方程。

The impression cylinder of J2108 offset press is regarded as research object in paper,and the deflection of cylinder is researched as simply supported beam with variable cross section .

以J2108型胶印机压印滚筒为研究对象，将滚筒挠曲变形作为变截面简支梁问题来研究，考虑重力载荷影响，通过积分法得到滚筒在印刷压力和重力载荷作用下的挠曲变形方程和曲线，应用MATLAB7.0平台上编写了印刷滚筒挠曲变形计算程序，为滚筒结构的合理设计提供了依据。

According to the structure and motion characteristics of the spherical offset mono-cone bit, compound cylindrical coordinates were set up, and basic geometric equations and the conditions of teeth to penetrate rock for the bit were presented.

针对偏心单牙轮钻头的结构和运动特点，利用复合圆柱坐标系统的基本原理，建立了偏心单牙轮钻头几何学基本方程和牙齿对岩石的吃入条件。

The train is treated as multi-body system, and its dynamic equations are derived using the D\'Alembert principle. The rail structure is modeled as discrete-supported three-layer system considering the degrees of rail, sleeper and ballast.

车辆为多刚体系统，采用D'Alembert原理建立其动力方程；轨道结构采用考虑钢轨、轨枕、道碴自由度的三层点支承模型；采用有限元法建立桥梁动力分析模型。

With boundary conditions,pressure distribution and the damping force on the plate can be found by solving the differential equation.

结合边界条件求解该方程可以得到各种压膜阻尼结构中的阻尼压强分布和阻尼力。

The variable geometry truss mechanisms have been studied extensively and systematically by this project. The research plan has been completed all sidedly, and expected results have been obtained. Three new kinds of combination decahedrons and a new class of variable geometry truss mechanism, which is composed of an octahedron and three tetrahedrons connected in parallel form, are proposed. The position analyses for decahedrons, dodecahedrons, triple-octahedrons, combinations decahedron and a new type of structure of variable geometry truss mechanisms are presented by introducing additional extra linear displacement sensors and using resultant elimination and homotopy continuation algorithms. The method of kinematical analysis of variable geometry truss mechanisms is established.

课题组对变几何桁架机构进行了深入的研究，全面地完成了研究计划，取得了预期的成果；提出了三种新的十面体组合机构以及由一个八面体和三个四面体组成的新型变几何桁架机构的结构形式；应用结式消元、附加传感器和同伦方法等提出了十面体、十二面体、三重八面体、组合十面体和新型变几何桁架机构的位置分析方法；建立了变几何桁架机构运动分析的一般方法；建立了简洁的凯恩和拉格伦日动力学的模型；应用有限元和子结构方法，提出了变几何柞架机构弹性动力学模型，导出了逆动力学方程的显式形式；设计和研制了一台可折叠的八面体变几何杵架机构装置等。

In this paper a full density matrix treatment is adopted to deal with the interaction between long-pulse,circularly-polarized light and the sodium atoms.

采用密度矩阵方法来处理长脉冲光与钠原子的相互作用，求解24能级钠精细结构的布洛赫方程，给出参与跃迁的每个态密度随时间的演化曲线。

With solving the determinantal equation, SAW propagation properties in AlN/GaN structures are acquired, including the phase velocity and electromechanical coupling coefficient which is vary with frequency, film thickness and c-axis orientation.

通过求解该行列式方程，分析了声表面波在AlN/GaN结构中的传播特性，包括声表面波相速和机电耦合系数随频率、AlN的膜厚和c轴取向的变化规律。

With solving the determinantal equation, SAW propagation properties in AIN/GaN structures are acquired, including the phase velocity and electromechanical coupling coefficient which is vary with frequency, film thickness and c-axis orientation.

通过求解该行列式方程，分析了声表面波在AIN／GaN结构中的传播特性，包括声表面波相速和机电耦合系数随频率、AIN的膜厚和C轴取向的变化规律。

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。