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Multiple experiments include whole sphere and sphere with cracks due to some spheres have a few cracks in the shell equatorial plane after welding. Then, the nominal compression stress-strain curves corresponding to different included angles θ between horizontal plane and welding line were plotted.

由于其中某些空心球在焊接时出现了孔洞,故分别做了完整和焊接出现孔洞的两种情况下的多组实验,得出了焊缝与水平面夹角θ成不同角度时压缩的名义应力-应变曲线。

The rheological character of a polymer often appears as shear-thinning. Most polymers behaviour in a solution can be explained by the polymer chain or hard sphere theory. Other than that, shear-thickening polymer solution also exists. Its behavior can be explained by dilatant theory, which suggests that the shear-thickening of the solution is due to the swelling of the polymer particles. This phenomenon often occurs in suspension or emulsion. Solution exhibits a mixed behavior can also be found whose behavior is such that shear-thinning occurs under low shear force and shear-thickening occurs under high shear force. Under this circumstance, the viscosity versus shear force graph exhibits a spoon shaped curve. The rheological study can be applied to the dispersion of paint which can predict the dispersion effect of various polymer materials in solution.

中文摘要一般高分子聚合物溶液的流变行为多半呈现剪稀(shear-thinning)的现象,而大部分的高分子在溶液中的行为是以分子链或是硬球观点来解释,另外也有剪稠(shear-thickening)现象的高分子溶液,其流变行为则是以膨胀体观点来解释,即在高剪切力下,由於高分子团体积变大而使溶液黏度升高,这在悬伏液、乳液等常见;但也有在低剪切力下,溶液具有剪稀的行为,而在高剪切力下却成现剪稠的行为,在黏度对剪切力作图时,会呈现出一个勾形曲线的图形;流变行为的探讨可应用在涂布材料的分散技术上,以推测不同的高分子溶液对分散效果的影响。

To establish GPS buoy above the surface near Tide Gauge for continuously monitoring sea level change and dealing with the dynamic relative positioning of the GPS tracking station integrated with the Tide Gauge, the instantaneous position of GPS buoy can be solved. Then based on ellipsoid height of each point and time series, the curve of height distribution is drawn. The curve can represent the instantaneous position of the sea surface.

在潮位站附近海水面上设置GPS浮标,持续量测海水面之变化,并与潮位站共构之GPS连续追踪站,进行动态相对定位,可解算出GPS浮标瞬间位置,再撷取其椭球高,以时间序列绘制此高程分布图,此曲线就代表海水面随时间变化之瞬间位置。

Ball on the 2nd of the key parts with amazing design: cylindrical hairspring balance wheel and the end of curve.

在以惊人的设计:圆柱游丝摆轮和最后的曲线关键零部件第二球。

Curve traced on an imaginary sphere with the source at its center and joining all the points corresponding to those directions in which the luminous intensity is the same, or a plane projection of this curve.

在一个以光源为圆心的虚拟的球面上,将光源射向球体上光强相同的各方向的点用线连接起来,就成为等光强曲线。

In this paper, a general, strain-consistent, third-order displacement field of shells is proposed. On this basis, the nonlinear theory of composite laminated shells including third-order transverse shear deformation and rotary inertia is developed. Hamilton's variational principle is used to derive the nonlinear static and dynamic governing differential equations and the corresponding boundary conditions of composite laminated anisotropic general shells under the orthogonal curvilinear coordinates. And the form of spherical shells is degenerated.

本文提出了一种最普遍的应变协调、三阶壳体位移场,在此基础上建立了考虑三阶横向剪切变形和旋转惯性的复合材料层合壳体非线性理论,用Hamilton变分原理导出了复合材料层合各向异性任意壳体在正交曲线坐标系下的非线性静、动力控制微分方程和相应的边界条件,并将其蜕化为球壳形式。

Going on the promise to guarantee to correct end cutting edge curve and rational tool cutting parameters, the implementation scheme of regrinding sphere end mill cutter on the four axis CNC machine tool is searched and discussed.

探讨了在保证正确的端刃曲线和合理的刀具切削参数的前提下,在四轴联动数控机床上对球头立铣刀重新修磨的实现方

The surface of conventional engineering part is composed of simple analytical surfaces and four-boundary ruled surface primarily. Therefore a point cloud segmentation method based on those feature surfaces is proposed. Several algorithms to identify the simple analytical surface feature are investigated and discussed. The theory of fitting scattered point to B-Spline and Bézier surfaces is introduced and a fitting method based on four boundary and point set is also discussed. Moreover, anew method to recover the fix-radius rolling ball blend is proposed and discussed in detail.

常规工程零件的外表面中包含了大量的特征曲面,如简单解析曲面和四边直纹面,因此,本文提出基于特征曲面的的点云分割方法,研究几种识别简单解析曲面的算法;研究由点云拟合B-Spline和Bézier曲线的理论基础,总结曲面拟合的几种方法,提出一种反求定半径滚球圆角的方法。

The characteristics of cutting edge and cutting advantages for a new type of ball end mill with space curve cutting edge is introduced,the calculating method of curve geometric parameters is explained,and the manufacture technology is presented.

介绍了一种新型空间曲线刃球头铣刀的刃形特征和切削优点,详细分析了其空间几何参数的计算方法,简要说明了其制造工艺。

Secondly, C1 Hermitian interpolation with spherical PH curve is discussed.

讨论了球面上PH曲线的C~1Hermite插值问题。

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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

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我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

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