对推铅球最后用力阶段左侧支撑用力技术效果的进一步研究   总被引：10，自引：1，他引：9  

李建臣  张万祥 《体育科学》1992,(2)

本研究用两部高速摄影机及两台瑞士产KISTLER测力台对我国10名优秀铅球运动员最后用力动作进行了测试。结果表明:①左脚着地后的突停制动与蹬伸动作对提高投掷效果有良好效应;②左腿强有力的支撑与快速蹬伸与投掷效果高度相关;③左臂、左肩及躯干的转动式鞭打动作与力效应特点,以及力梯度、垂直冲量、平面力矢分析进一步表明了左侧支撑用力技术与提高投掷效果的关系;④为用术语方便起见,可将左侧支撑用力技术简称为左侧撑蹬。  相似文献   

我国优秀男子跳高运动员助跑最后一步摆动腿支撑技术的运动学特征     

成万祥  林溪  于善安 《上海体育学院学报》2005,29(3):68-71

运用高速摄影与解析的方法，对我国优秀男子跳高运动员比赛中不同高度跳次间，摆动腿在助跑最后一步支撑过程的技术特征进行对比分析。结果表明：摆动腿支撑过程质心水平速度、质心高度、蹬伸阶段质心前移水平距离、膝关节角度等方面均存在一定差异，认为：质心水平速度的降低，是运动员试跳失败的制约因素之一。  相似文献   

中国科技论文综合评价决策支持系统的设计与应用   总被引：3，自引：1，他引：2  

庞景安 《情报学报》2002,21(2):226-231

文章简要介绍中国科技论文综合评价决策支持系统的设计与应用。包括 :系统目标与功能 ,系统数据组织与控制 ,系统数据流运行框图 ,系统决策支持服务体系以及系统应用发展前景等  相似文献   

Paving Consensus: Enacting, Challenging, and Revising the Consensus Process in a Cohousing Community   总被引：1，自引：0，他引：1  

Mary Ann Renz 《Journal of Applied Communication Research》2006,34(2):163-190

This study focused on a cohousing community's use of consensus to make a decision about surfacing a parking area. It revealed that the community's use of consensus decision making allowed the residents to balance three goals: making an appropriate decision, meeting members' needs, and maintaining the community's well-being. Reaching agreement, however, was complicated by members' value differences and discontinuity in their participation. The analysis of this case reveals three qualities characteristic of the enactment of consensus: the role of structured communication within and between group meetings, a tension between maintaining process openness and reaching decision closure, and the expectation that group members will work within the consensus process. The analysis also highlights the importance of timing in the interpretation of conflict in a consensus-oriented group and the role of process change when a group reaches the limits of members' commitment to consensus.  相似文献   

Effects of Narrative and Paradigmatic Judgmental Orientations on the Use of Qualitative and Quantitative Evidence in Health-Related Inference     

Michael Robert Dennis  Austin S. Babrow 《Journal of Applied Communication Research》2005,33(4):328-347

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远程开放教育支持服务系统的建设与应用     

陈宇翔 《广东广播电视大学学报》2002,11(3):24-26

远程教育服务系统的建设与应用主要包括三个方面内容：1、开放教育的物质条件(校园网络的规划、多媒体平台的建设)；2、教师与网上教学资源的建设；3、学生学习态度与观念的转变。  相似文献   

Explaining match outcome in elite Australian Rules football using team performance indicators     

Sam Robertson  Nicole Back  Jonathan D. Bartlett 《Journal of sports sciences》2016,34(7):637-644

The relationships between team performance indicators and match outcome have been examined in many team sports, however are limited in Australian Rules football. Using data from the 2013 and 2014 Australian Football League (AFL) regular seasons, this study assessed the ability of commonly reported discrete team performance indicators presented in their relative form (standardised against their opposition for a given match) to explain match outcome (Win/Loss). Logistic regression and decision tree (chi-squared automatic interaction detection (CHAID)) analyses both revealed relative differences between opposing teams for “kicks” and “goal conversion” as the most influential in explaining match outcome, with two models achieving 88.3% and 89.8% classification accuracies, respectively. Models incorporating a smaller performance indicator set displayed a slightly reduced ability to explain match outcome (81.0% and 81.5% for logistic regression and CHAID, respectively). However, both were fit to 2014 data with reduced error in comparison to the full models. Despite performance similarities across the two analysis approaches, the CHAID model revealed multiple winning performance indicator profiles, thereby increasing its comparative feasibility for use in the field. Coaches and analysts may find these results useful in informing strategy and game plan development in Australian Rules football, with the development of team-specific models recommended in future.  相似文献   

锚杆支护在沿空掘巷中的应用   总被引：2，自引：0，他引：2  

单守春 《鸡西大学学报》2007,7(4):59-59,37

本文介绍了采用高强度螺纹钢树脂锚杆支护技术在复合顶板沿空掘巷现场的使用及效果,与架棚支护比较,支护成本明显降低,巷道顶板支护实现了安全可靠。  相似文献   

构建导学群教学模式的支撑体系     

杨怀恩 《山西广播电视大学学报》2006,11(2):3-4,53

导学群作为山西电大在实践中不断探索、总结、创新的一种开放教育管理模式，需要全新的教育理念作为其思想支撑；具有多方面知识和技能的教师队伍作为其智力支撑；高质量的多媒体教学资源作为其资源支撑；交互式网络平台系统作为其技术支撑；全面质量管理作为其管理支撑；提倡“尊重人性、热爱教育、团结协作、追求创新”的文化建设作为其文化支撑。  相似文献   

喷锚支护在高层建筑深基坑支护中的应用     

李春霞  郭栋 《洛阳工业高等专科学校学报》2006,16(1):40-41,44

高层建筑深基坑开挖过程中边坡稳定不容易保证,喷锚支护体系是将锚杆与滑裂面以外土体连成一个整体,再通过外拉系统与深基坑边坡组成一个整体受力体,承受主动土压力,利用土层的锚固力,维持被锚固体(边坡)的稳定,从而使得开挖的基坑获得广阔的空间。  相似文献