中轴

The rolling friction coefficient between roller and track is an important parameter in building monolithic moving engineering.

滚轴滚动摩擦系数是建筑物整体迁移工程水平动力计算的重要参数，在钢管混凝土滚轴与钢板的滚动摩擦试验中，测得滚动摩擦系数为0.002～0.004，它随滚轴受到的竖向压力增大而减小。

We proposed a set of tabulate shim coils to improve the imaging field homogeneity for permanent magnet. By studying the magnetic spherical harmonics and its Taylor expansion, the proposal of designing lower-order radial coils was derived including x, y, xz, xz~2, x~2-y~2 etc. In addition, a novel composite design was presented for the axial coils. By controlling the shim currents of axial coils, different axial magnetic fields can be obtained. This method simplified the design process of axial coils, and made the axial correcting magnetic field more precise.

本文针对永磁体的组成结构提出了一种平板式匀场线圈设计方法，通过研究成像磁场的球谐函数以及通电圆弧在自由空间产生磁场的泰勒展开级数，导出了x、y、xz、xz~2、x~2-y~2等低阶径向线圈的设计方法，同时针对轴向线圈提出了一种新的混合式设计方案，能够通过控制线圈中的电流组合实现对不同轴向磁场分量的获取，简化了轴向线圈的设计过程，提高了校正磁场的准确性。

We report a sponge spicule assemblage from the Lower Cambrian black shales of the Hetang Formation at Xiuning in Anhui Province, South China. Based on morphological differences, the spicules can be divided into 4 types including monaxons, biaxons, triaxons and tetraxons.

本文报道皖南休宁县早寒武世荷塘组黑色页岩中产出的海绵骨针化石组合，这些海绵骨针化石具有较高的丰度和分异度，它们以二轴四射针、T型针、三轴六射针和三轴五射针为主。

3 Axially Symmetric Problems for Space Among spatial problems, if the elasticity body's geometric shape,restraint condition and any external factors are symmetrical in a certain axis(any plane which passes this axis is all symmetrical one),then all stresses,deformations and displacements are symmetrical in this axis.

§8-3 空间轴对称问题在空间问题中，若弹性体的几何形状，约束情况以及所受的外来因素，都对称于某一轴(通过这个轴的任一平面都是对称面)，则所有的应力，形变和位移也对称于这一轴。

At first in the preliminary design this paper computes the linear damping coefficient of the viscous damper employed in this project using Composite Response Spectra approach, meantime, this paper proves that reducing the exponent of velocity of the piston can increase the magnitude of the dissipative energy, because of the viscous damper employed in the practical project character nonlinear behavior; next this chapter performs analysis and comparison between the building without and with the viscous dampers aforementioned when the building suffers from various Time Domain Response, from the angle of displacement, interstroy drift, velocity, interstory velocity, acceleration, energy, maximum axial force of the dampers and of the column etc., in order to prove that the incorporating the viscous dampers into the buildings has great superiority on enhancing its aseismic performance ; furthermore, this chapter also expatiates on diverse assembly form of the viscous dampers that results in the adverse impact on the internal force of the structural member in this building, on the ground of which this segment bring about the preference of the assembly form of the viscous damper; finally this chapter points out the sphere of application of the analysis and computation using Composite Response Spectra approach in design: it is available in well-proportioned stiffness structures and isn抰 available in the structures that contain weak story. It is recommendable, particularly, to incorporate the fluid viscous dampers into this structure that contain weak story to refrain earthquake and reinforce, such as the Central Hall of Shanghai Exhibition Hall.

首先使用了反应谱分析法设计出欲附设的粘滞阻尼器的线性阻尼系数，由于实际工程所用的粘滞阻尼器具有非线性的特性，故而笔者又证明了降低速度指数对提高粘滞阻尼器的耗能量的优势所在；接着分别从位移、层间位移、速度、层间速度、加速度、能量、最大阻尼出力和柱轴力等不同的角度对结构在附设粘滞阻尼器前后的时程反应进行了分析对比，籍此在实际工程中证明了附设粘滞阻尼器对于提高结构的抗震性能的优越性；再者，笔者还阐述了采用不同的粘滞阻尼器布置方式对结构中构件内力特别是柱轴力和基座竖向反力产生的不利影响，并在此基础上提出了布置方式的优选；最后，指出了反应谱法在设计中的适用范围：对于均匀结构反应谱法能够使用，而对于含有薄弱层的结构反应谱法并不适用；对于类似于上海展览馆中央大厅的含薄弱层的结构尤其值得使用粘滞阻尼器的方法进行抗震加固。

This paper extends the analysis for axial-system torsional oscillation into the nonlinear domain,and the research for Hopf ramification phenomena in axial-system torsional oscillation has been made using the time-domain simulating results,it verified the analysis results of similar nonlinear differential equation describing the axial-system torsional oscillations.

文中把发电机轴系扭振的分析扩展到非线性领域，并对轴系扭振中的Hopf分歧现象进行了研究，利用时域仿真结果对从描述轴系扭振的近似非线性微分方程分析所得结果进行了验证。

If, therefore, the casing has an opening , as at DD, to allow the air to escape and the center or inlet of the fan is connected to the upcast shaft by means of a fan drift, air will be sucked up the upcast shaft and discharged into the atmosphere at the oulet,O.⑨Thus the upcast air column is rare fied or rendered less dense than that in the downcast shaft.

因此，如果套管有开放的，因为在房屋署副署长，让空气逃脱中心或进气道的风扇连接到upcast轴通过一个风扇漂移，空气将被吸了upcast轴和排放到大气中，在oulet ，澳⑨因此upcast空栏是罕见然后将该或使其密度较低，比在downcast轴。

In teaching the content including three-view drawing and axonometric drawing in Technology and Design Book one which is published by Suzhou's Education Press, firstly the writer has made a adjustment on the order of the teaching content and a complementarity on the concept of the proportion of the three-view drawing.

执教《技术与设计1》三视图和轴测图的绘制教学内容，在教学实施中，对教学内容知识顺序作以调整，补充三视图比例概念，使用平面结构形体、曲面结构形体、组合结构形体模型实测画三视图；轴测图内容补充斜二测轴测图的绘制，使学生掌握识读工程图的基本方法、培养绘制工程三视图的基本能力、了解工程图的基本规范，初步养成按标准绘制工程图的良好习惯，挖掘学生对技术设计的内核的深刻理解和自身的原创力。

"A slip joint consists of outside splines on one shaft and matching internal splines in the mating hollow shaft , the splines cause the two shaft s to rotate together But permitthe two to move endwise with each other."

伸缩花键由在传动轴上的外花键和与之相连的空心轴中对应的内花键组成。伸缩花键使两轴一起转动，也能使两轴相对移动。

"A slip joint consists of outside splines on one shaft and matching internal splines in the mating hollow shaft, the splines cause the two shafts to rotate together But permitthe two to move endwise with each other."

伸缩花键由在传动轴上的外花键和与之相连的空心轴中对应的内花键组成。伸缩花键使两轴一起转动，也能使两轴相对移动。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。