双波谐波齿轮中柔轮变形波的波形分析

本文简述了谐波齿轮传动的工作原理，分析了双波谐波齿轮中柔轮任一点的径向变形Δ随转角Φ的变化规律，给出了二者的函数关系表达式，借助计算机作为工具作出了二者的关系曲线。     

普通高校开展轮滑教学现状的调查与分析

通过对普通高校开展轮滑教学现状的调查及所面临发展机遇与挑战的分析,提出了普通高校体育课开展轮滑教学应采取的若干对策与措施,以使轮滑运动能在普通高校中更好地发展。     

4×4载货汽车的设计要点技术分析

以一吨4×4载货汽车的设计为例,对特殊性能进行专门系统的理论分析,寻求比较合适的4×4载货汽车的设计要点.通过计算分析,得出在轴距的选择、轮距的确定、动力总成及各大总成的布置、横向稳定杆的选择、汽车的摆振控制等方面应重点考虑,才能使4×4载货汽车设计趋于合理.     

Planetary scroll surface polishing method for aluminum wheel hub

Instead of manual polishing work for aluminum wheel hub （hub） surface, a new planetary scroll surface polishing method based on the rotation and revolution of hub in abrasives is presented in this paper. Since conventional barrel rotation polishing mode is unsatisfactory, shorter polishing period and lower energy consumption are expected. The surface polishing mechanism of the proposed method is ghen introduced. The influence of cutting velocity, cutting angle, abrasive on surface polishing quality and efficiency, as well as the correlation of the revolution velocity and the rotation velocity of hub are discussed. Experimental results show that high surface polishing quality and efficiency can be achieved with the new polishing method implying that a dustless clean working environment is realized.     

Development of an automatic polishing system for aluminum wheel-hub surface

To improve polishing quality and cope with the shortage of skilled workers for aluminum wheel-hub surface polishing, an automatic surface polishing system with hierarchical control based on the teaching-playback method was presented. Multi-axis cutter location data （CL data） were generated with the teaching method. First, a helical tool path and a flexible polishing tool were adopted to achieve high quality and high efficiency; next, the initial irregular data were processed into continuous polishing CL data. The important factor affecting polishing quality, namely the interpolation cycle in the multi-axis CL data was calculated based on a constant removal rate. Results from polishing experiments show that the quality of automatic machine polishing is better and stabler than manual polishing.     

Wm∨Pn（n≥5）的点可区别边色数

研究了Wm∨Pn（n≥5）的点可区别边染色,给出了Wm∨Pn（n≥5）的点可区别边色数.     

一种带随机选择机制的新型改进粒子群优化算法

标准粒子群优化算法对空间所有区域等概率搜索,降低了算法效率。借鉴遗传算法的思想,本文提出一种带随机选择机制的改进粒子群优化算法。该算法将适应值选择和粒子状态更新方程结合起来,通过赌轮算法选择机制使得粒子在适应值较小的区域尽可能的降低搜索概率,在最优解可能区域尽可能加大搜索强度,从而提高算法搜索效率。通过标准进化计算测试函数测试,实验结果表明对于复杂优化问题该算法优于标准粒子群优化算法和遗传算法。     

Relationships between clubshaft motions and clubface orientation during the golf swing

Since clubface orientation at impact affects ball direction and ball spin, the ability to control clubface orientation is one of the most important skills for golfers. This study presents a new method to describe clubface orientation as a function of the clubshaft motions (i.e., swing plane orientation, clubshaft angle in the swing plane, and clubshaft rolling angle) during a golf swing and investigates the relationships between the clubshaft motions and clubface orientation at impact. The club motion data of driver shots were collected from eight skilled golfers using a three-dimensional motion capture system. The degrees of influence of the clubshaft motions on the clubface orientation were investigated using sensitivity analysis. The sensitivity analysis revealed that the swing plane horizontal angle affected the clubface horizontal angle to an extent of 100%, that the clubshaft angle in the swing plane affected both the clubface vertical and horizontal angles to extents of 74 and 68%, respectively, and that the clubshaft rolling angle affected both the clubface vertical and horizontal angles to extents of -67 and 75%, respectively. Since the method presented here relates clubface orientation to clubshaft motions, it is useful for understanding the clubface control of a golfer.     

我国体育社会组织的内涵、演进与发展

运用文献资料法和逻辑分析法,对体育社会组织的概念、分类、功能进行诠释,并梳理了建国以来我国体育社会组织的演进历程,将其分为全能型政府下的依附期、发展型政府下的管控期和服务型政府下的合作期三个阶段。认为,现阶段我国体育社会组织发展虽然取得了总量的增加、双重管理体制的突破以及从管控到培育的角色转变等成效,但也暴露出去行政化不彻底、与政府合作机制不成熟、社会参与意识薄弱等不足。针对以上问题,指出坚持体育事业与体育产业“双轮驱动”的发展模式,注重法治化、枢纽化和专业化建设,逐步形成政社分开、权责明确、依法自治的现代意义上的体育社会组织是未来我国体育社会组织的发展趋势     

探讨建立短跑途中跑后蹬、摆腿、着地缓冲的合理技术模式

人们的运动不是一个静态的过程,而是一个连续的不可分割的动态过程,所以我们在进行技术动作研究就应从整体上去进行。本文基于这一角度考虑,通过文献资料法,对比分析法和运动生物力学分析法探讨建立后蹬、摆腿与前扒着地缓冲的合理技术模式,为广大体育教师和教学和教练员、运动员的训练提供可行性参考。