截面

Based on the theory of the electromechanical analogy and the special wave equation,the equivalent circuit of the exponential acoustic waveguide was derived,the formula of its impedance transformation was obtained.

基于机电类比原理，从特殊形式波动方程出发，推导出了指数形变截面声波导管的等效电路，从等效电路推导出了声波导管的阻抗转移公式。

This paper has also discussed the influence of section shape of steel beam on the heating transfer.

本文还进一步讨论了梁截面形状对传热性能的影响。

The pylon is skew on the main span, which is different to that of general cable - stayed bridge. Prestressing strands are laid in the pylon and the constitution of anchorage zone is complicate.

文章摘要：兰墅大桥索塔为变截面的弯塔，与常规斜拉桥的弯塔不同，该弯塔是弯向主桥一侧，索塔中锚固区构造复杂，同时在索塔中还布置了预应力钢束。

A crowned gear may be shaved by a modified plunge shaving cutter which is designed and manufactured based on the one to one mapping principle that means the axial modification of the cutter corresponds that of the crowned gear to be shaved. The calculation algorithm is given in dissertation.

考虑到目前国内的加工条件，本学位论文通过构造标准渐开螺旋面，令两齿面在中截面上节圆处重合，并采用计算机数值算法，求解了径向剃齿刀相对渐开螺旋面在齿形、齿向的修形量，从而使径向剃齿刀可以采用普通剃齿刀磨床加工。

Open screen area shall be at least 6.0 times greater than the nominal pipe size open area.

敞开的过滤网面积应该至少是管道口径截面面积的六倍以上。

The exact effective nuclear charge numbers have been defined andcalculated with the mean radius of the initial orbital of the active electron toconsider the combined -effects of relativity and screening in an actualtranstition calculation . The electron impact ionisation cross sections and thecorresponding ionisation rate coefficients of Li like ions 〓、〓、〓、〓and〓 have been calculated by using our calculated effective nuclearcharge numbers.

我们考虑并修正了原始理论中对屏蔽常数物理意义的不正确定义和算法，更精确考虑了其它电子对被电离电子的屏蔽效应以及相对论收缩对有效核电荷数的影响，得到了更可靠的有效核电荷数，并给出了更好的电离截面结果。

Aimed at the practical application of cold-formed steel elements with special section, here conies an originative and more simple joint-Rosette-joint.The Rosette-joint is a completely new joining method for cold-formed steel structures.

针对特殊截面冷成型钢构件的实际应用，冷成型钢的连接出现了一种新颖且构造更加简单合理的连接形式——插座式节点。

The transformation relationship from the screw axial section to its orthogonal projection and the compensation are given.

本方法的特点是不需要将丝杆抬起升角角度就可实现测量，给出了在螺纹轴截面和正交投影间基准转换的关系式，并以此讨论分析了补偿量。

The mechanical mathematics model of system was built, and the computer numerical value simulation was carried out. Taking the rotation speed and damping as the furcation parameters and combining with Poincare sectional view, oscillogram, phase plane plot, locus of axle center, power spectrum graph and self correlative functional diagram, the kinetic status of system was analyzed.

建立了系统力学数学模型，进行计算机数值模拟，以转速和阻尼为分叉参数，结合Poincare截面图、波形图、相平面图、轴心轨迹图、功率谱图和自相关函数图，分析了系统的运动状态。

The surface and section of the dynamic membrane at different concentrations of PAC were observed by scanning electron microscopy.

向由孔径为56μm的普通工业滤布组成的膜生物反应器中投加不同量的粉末活性炭，对恒通量下的单周期运行情况进行了考察，并对被污染的动态膜表面和截面进行了扫描电镜观察。

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。