截面

Beginning with FEM solution for transient heat conduction, turning to the theory of solar radiation and some heat engineering manuals, utilizing the commercial FEM software ANSYS, the variation regulars to time of temperature field in the standard cross-sections of the composite beam and tower columns of Harbin Sifangtai Bridge have been clarified under the third boundary condition.

本文从非稳态温度场的有限元解法入手，利用太阳辐射的相关理论和国内外热工工程手册上的数据，按第三类边界条件给四方台大桥叠合梁和主塔的一个标准截面施加边界温度荷载，采用ANSYS 软件求出了标准截面温度场随时间变化的规律。

Through the analysis of the torsional stress produced in the open sections vehicle frame s under typical operation conditions the calculating formula is achieveal,which leads to the stress distribution of the open section frame and the ideas of improving the distribution of the torsional stress are discussed.

通过对常见开口截面车架在典型工况时扭转应力的分析，推导出扭转应力计算公式，从而得出了开口截面车架的一些应力分布规律，提出了改善车架扭转应力分布的具体措施。对汽车车架设计方案的拟定和车架应力分析具有指导作用

METHODS: The endodontic instrument was assumed as a metal conical bar. The normal stress of bending loads and the shear stress of torsional loads were calculated with the knowledge of mechanics. The relations between stress and such parameters as angle and radius of canal curvature, radius of instrument, polar moment of inertia, and metal elastic modulus were analyzed. The criteria for yielding and fracture of the instrument were discussed.

将根管器械刃部假设截面为圆的金属细锥杆，利用材料力学及断裂力学的原理与方法，分别计算根管器械在弯、扭载荷下的应力分布，分析应力与根管弯曲角度、根管弯曲半径、器械直径、器械横截面极惯性距、金属弹性模量等参数的确切关系；探讨器械屈服、断裂失效的准则。

METHODS: The endodontic instrument was assumed as a metal conical bar, the normal stress of bending loads and the shear stress of torsional loads were calculated with the knowledge of mechanics , the relations between stress and such parameters as angle and radius of canal curvature, radius of instrument, polar moment of inertia, metal elastic modulus were analyzed, the criteria for yielding and fracture of the instrument were discussed .

将根管器械刃部假设为截面为圆的金属细锥杆，利用材料力学及断裂力学的原理与方法，分别计算根管器械在弯、扭载荷下的应力分布，分析应力与根管弯曲角度、根管弯曲半径、器械直径、器械横截面极惯性距、金属弹性模量等参数的确切关系；探讨器械屈服、断裂失效的准则。

In this paper, the combination of the section variables in a truss is discussed in theory and the min...

本文着重从理论上探讨了截面变量的归并问题，给出了所需的最少截面变量数目和方便可行的求解方法。

Plyfil composite yarns is similar to two-ply yarn structures.

纺纱方法决定着成纱结构，成纱结构与纱线组成原料又决定了纱线的性能。sirofil复合纱线纺纱时长丝与短纤纱须条的间距及长丝的张力，plyfil复合线加工时二组分间并线张力对成纱结构及纱线的性能有着重要影响。sirofil复合纱的成纱横截面呈近似圆形结构，长丝位于成纱的一侧；纵向呈有"股线螺纹"的单纱外观。plyfil复合线具有类似于传统双股线的横截面和纵向外观。

This paper introduces the method,step and notice of using vector network analyzer to measure broadband swept frequency Radar Cross Section in RF simulation anechoic chamber,and elaborates the principle test technology to improve the measurement accuracy.

介绍了利用矢量网络分析仪在射频仿真暗室内进行宽带扫频雷达散射截面测量的方法、步骤、应注意的问题，以及为提高测量精度采用的主要测试技术，并结合实验测试证明了该方法在射频仿真暗室中进行雷达散射截面测量的可行性。

There are many cross-section forms in this bridge style. The form of double thin-wall piers is popularly used among of them. The key problem is how to choose the thickness of one single pier and the distance between two single piers from center to center. Depending on technical experience or trial analogism, the conventional technical methods have some limitations.

在大跨径连续刚构桥桥墩截面形式中，双薄壁墩又是较常用的一种截面形式，其设计的关键问题是如何合理的选择双薄壁墩的墩中心距和壁厚，传统的技术方法是凭借经验或类比试算来决定墩中心距与壁厚，具有一定的片面性。

One line from inferior edge of anteroinferior iliac spine to the crossing point of posterior gluteal line and posterior iliac crest was defined as A line, which was parallel to the Chiotic line (the crossing point of Chiotic line and posterior iliac crest called CLIC point).

设定髂前下棘下缘向后经过臀后线与骼嵴后部交叉点的连线截面为A线截面，此线与Chiotic线平行（Chiotic线与髂嵴后部交叉点称为CLIC点）。

The dynamics nuclear reaction with the Borromean nucleus 〓He was investigated based on the calculation of nuclear reactions system for stable nucleus 〓He and exotic nucleus 〓He collide on C target by an isospin-dependent Boltzmann-Langevin Equation which included symmetry energy, isospin-dependent N-N cross sections and isospin-dependent Pauli blocking.

论文最后，利用同位旋相关的Boltzmann-Langevin方程计算稳定核〓He和奇异核〓He同C靶的反应系统来研究〓He反应动力学特性，研究反应产生的核素产生截面，以及〓He产生截面随碰撞参数的变化。

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。