武汉体育学院优秀男子散打运动员鞭腿技术动作髋、 膝关节速度和角度特征分析

运用两台日本松下MD-9000数码摄像机对6名优秀散打运动员鞭腿动作进行同步拍摄,采用美国ARIEL系统进行三维图像解析,从运动学的角度揭示我国优秀男子散打运动员鞭腿动作支撑腿和进攻腿髋、膝关节速度和角度变化特征,以期为鞭腿技术动作的教学、训练提供科学依据.     

中南地区高校图书馆馆际互借与文献传递的现状、问题及建议

通过对中南地区高校图书馆馆际互借与文献传递服务的网上调查，对各高校图书馆馆际互借与文献传递的服务内容、服务对象、收费标准和服务模式进行分析和比较，指出中南地区各高校图书馆馆际互借与文献传递存在的问题，并提出对策。     

宋明"瓦舍"与现代"健身娱乐场所"社会功能探析

“瓦舍”是宋明城市商品经济发展和市民化发展需要的产物,它是融体育、艺术、娱乐、消闲为一身的固定综合性游乐场所,具有政治、经济、竞技、健身、教育、娱乐、消闲等多种社会功能,它的形成与发展大大地丰富了市民化生活,并为现代“健身娱乐场所”的发展奠定了基础,随着现代社会发展和人们化生活的需求,现代“健身娱乐场所”朝着多形式、内容多样化、功能多元化和娱乐设施现代化的方向发展。     

Impact absorption of tennis shoe-surface combinations

The aim of this study was to investigate, for typical shoes and surfaces used in tennis, the relative role of the shoe and surface in providing cushioning during running. Five test surfaces ranging from concrete to artificial turf were selected, together with two shoe models. Impact absorbing ability was assessed mechanically using drop test procedures and biomechanically using peak magnitude and rate of loading of impact force and peak in-shoe pressure data at the lateral heel. Differences in biomechanical variables between shoe-surface combinations were identified using a two-way ANOVA (p < 0.05). Mechanical test results were found to rank the surfaces in the same order regardless of the shoe model, suggesting that the surface is influential in providing cushioning. However, for all mechanical and biomechanical (p < 0.05) variables representing impact absorbing ability, it was found that the difference between shoes was markedly greater than the differences between surfaces. The peak heel pressure data were found to rank the surfaces in the same order as the mechanical tests, while impact force data were not as sensitive to the changes in surface. Correlations between mechanical and biomechanical impact absorption highlighted the importance of testing the shoe-surface combination in mechanical tests, rather than the surface alone. In conclusion, mechanical testing of the shoe-surface combination was found to provide a strong predictor of the impact absorbing ability during running if pressure data were used. In addition, for typical shoe-surface combinations in tennis, the shoe was found to have more potential than the surface to influence impact loading during running. Finally, in-shoe pressure data were found to be more sensitive than force plate data to changes in material cushioning.     

FTP服务器在稿件传输中的应用

介绍动态域名FTP服务器在期刊稿件送审中的应用,主要包括大容量稿件送审和审稿专家自主择稿进行审阅的实现方法.     

基于虚拟联合目录的高校文献传递服务体系建设

目前四川省高校的文献资源及网络数字资源相对不足,难以满足学校快速发展和提高教学科研水平的文献信息需求。为提高各高校的文献资源保障和服务能力,通过建立基于虚拟联合目录的高校文献传递服务体系,以数字资源建设为突破口,重点提高本校优势领域和新办专业的文献保障水平,以馆际协作协调为补充,优势互补,资源共享,多快好省地扩大全省高校文献保障范围和深度是一条切实可行的道路。     

太极拳运动单脚支撑姿势持续时间与地面反作用力特征的分析

运用摄影测量法和Novel Pedar-X足底压力测试系统采集了16名太极拳练习者在太极拳运动和正常步行中足底压力和运动影像信息,并对两种运动方式的单脚支撑姿势持续时间指标进行对比分析。研究表明:与正常步行相比,在太极拳运动中单脚支撑姿势总的持续时间所占比例(标准化值)较少(P<0.05);单次单脚支撑姿势平均持续时间较长(P<0.01);认为太极拳运动可以提高人体单脚平衡能力。另外还发现太极拳运动和正常步行中地面反作用力都在不断变化;太极拳运动中地面反作用力小于其正常步行值。     

粉喷桩处理软基的质量控制

文章论述了粉喷桩加固软土地基的机理和施工工艺流程,探讨了其在公路建设应用中的质量控制和质量检测技术。     

地下金属管线探测传感器的改良和灵敏度的优化

以地下金属管线探测仪为背景,基于感应式磁传感器设计原理,通过对传感器线圈灵敏度进行深入分析,采用非晶态合金磁芯对现有的传感器线圈进行改进并实际设计了一款磁传感器线圈,理论计算了基于非晶态合金磁芯线圈的灵敏度,通过实验验证了新设计的磁传感器线圈达到灵敏度最优。     

Perform kicking with or without jumping: joint coordination and kinetic differences between Taekwondo back kicks and jumping back kicks

We investigated joint coordination differences between Taekwondo back kicks and jumping back kicks, and how jumping (in performing the latter) would alter engaging ground reaction forces (GRF) in executing kicking. Ten skilful athletes volunteered to perform both kinds of kicking within the shortest time for three successful trials. Three high-speed cameras and two force platforms were used for data collection, and the trial with the shortest execution time was selected for analysis. Movements were divided into the rotation and attack phases. With comparable execution time and maximum joint linear/angular speeds, back kicks and jumping back kicks differ mainly in larger GRF in the latter, and in greater target acceleration in the former probably because the support leg prevented athletes’ rebounding after impact. In addition, more prominent antiphase and in-phase coordination between the shoulder segment and knee joint, and elongated rotation phase were found in jumping back kicks. Larger GRF values in jumping back kicks were generated for jump take-off rather than for a more powerful attack. In back kicks although the support leg remained ground contact, greatly decreased GRF in the attack phase suggested that the support leg mainly served as a rotation axis.