体操摆动动作力学原理演示仪

本研究的主要目的是：描述、演示体操摆动动作中，不同的阶段回转半径的改变对转动速度、角加速度、幅度的影响．教学实践证明该演示仪能将体育运动中难以观察的转动力学的原理、规律很好的演示出来，直观效果好，设计有创新性，其力学原理学生可直观接受．     

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。     

武术腾空摆莲720°接马步的运动学分析

本文采用运动生物力学的三维摄像解析法对武术腾空摆莲720°接马步动作进行运动学分析,揭示该动作的运动学特征,为提高动作质量,改进动作技术提供参考。     

李皋治荆时期的生产技术传播

唐代长江下游地区的水利事业已很发达,给生活于此的李皋留下了深刻印象。李皋后来在荆南娴熟地修堤造田,架桥凿井,就得益于下游的生活阅历。而李皋在襄阳发明创造车船,是长江中游造船业、水利灌溉事业长期发展的自然结果。     

Decision making and cultural heritage: An application of the Multi-Attribute Value Theory for the reuse of historical buildings

The reuse of historical buildings can be seen as a complex decision problem because of the presence of different objectives to be pursued, the public/private nature of the goods under investigation, the existence of several values (historical, artistic, cultural, economic, etc.), the presence of different actors (public government representatives, architects, architectural historians, developers and owners). In decision problems related to the reuse of historical assets conflicts can arise and the availability of analytical frameworks able to support the process is getting more and more important. It has been generally agreed that Multicriteria Decision Analysis (MCDA) can offer a formal methodology to deal with such decision problems, taking into account the available technical information and stakeholders’ values. This paper considers the problem of sustainability assessment in cultural heritage projects using the Multi-Attribute Value Theory (MAVT) approach, which is a particular kind of MCDA technique. Starting from a real case concerning the reuse of historical buildings in the metropolitan area of Torino (Italy), the paper aims at exploring the contribution of MAVT for decision problems in the field of cultural heritage.     

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.     

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。     

磁吸附式双轮减振切割机设计

针对切割机在电机高速旋转工作状态下所出现的机身颤振问题,设计了一款磁吸附式双轮减振切割机,解决机身颤振与切割刀片定位精度差等问题。通过完成切割机动力源选择、支架结构设计、传动方案选用、磁座位置优化、整机工作原理分析等五部分内容,选用S—N极磁性底座,实现对金属切割体吸附式的减振,采用双轮对称结构,消除系统动态不平衡力,提高切割片定位精度。     

从土族"轮子秋"论民族体育的时代价值

“轮子秋”就是土族人民众多体育活动中的一项文体兼并，具有较强健身作用和审美价值的运动项目，文章以此为例进一步探讨了民族体育的时代价值．     

关于Wm∨Sn的全色数↑

通过对轮和星的研究,就轮Wn与星Sn的联图Wm∨Sn,得到了在m,n不同取值情况下的全色数,解决了已有40年的关于图的全染色的猜想,把图论的全染色问题向深层次推进了一步.