2002年全国健美操锦标赛难度动作分析   总被引：12，自引：0，他引：12  

胡湘  周建社  谭惠芳  申锐 《北京体育大学学报》2004,27(2):281-282

通过现场观看比赛和录像观察,对2002年全国健美操锦标赛的男子单人和女子单人项目的前8名的成套动作中的难度动作数量、组别、分值、C组难度动作空中姿态类型,进行统计分析.结果表明,目前我国运动员的成套动作中所选择的四个组别难度动作的比例基本合理,且符合运动员各自的身体素质能力和训练水平,完成质量比往年有很大的提高.但在C组跳与跃类难度动作的选择上缺乏多样性,存在着较多的空中姿态重复现象,与竞技健美操最新发展趋势有一定的差距.  相似文献   

Screening for risk of low energy availability in athletic and recreationally active females in Ireland     

Danielle M. Logue  Sharon M. Madigan  Mirjam Heinen  Sarah-Jane McDonnell  Eamonn Delahunt  Clare A. Corish 《European Journal of Sport Science》2019,19(1):112-122

ABSTRACT

Introduction: Low energy availability (LEA) results in physiological adaptations, which can contribute to unfavourable health outcomes. Little information exists on risk of LEA in active individuals competing in different sports or levels of competition. The aims of this study were to (1) identify risk of LEA in females competing at different levels of competition and (2) investigate associations between risk of LEA, illness and dietary habits. Methods: The validated questionnaire, ‘Low Energy Availability in Females Questionnaire’ was distributed online (November 2016–February 2017) to assess risk of LEA. Twenty-nine additional questions collected information on demographics, illness history and dietary habits. Participants were considered at risk of LEA if they attained a score of?≥?8 and were grouped into: (i) international; (ii) provincial/inter-county; (iii) competitive; and (iv) recreationally active. Chi-square and logistic regression analyses were used to explore differences between those at risk or not at risk of LEA. Results: Risk of LEA was identified in 40% (n?=?331) of 833 participants and was 1.7 and 1.8 times more likely in international and provincial/inter-county athletes compared to those who were recreationally active (International: odds ratios (OR) 1.68, 95% confidence intervals (95%CI) 1.12–2.54; Provincial/inter-county: OR 1.83, 95%CI 1.20–2.77). In participants at risk of LEA, missing >22 days of training during the previous year due to illness occurred 3 times more frequently (OR 3.01, 95%CI 1.81–5.02). Conclusion: Risk of LEA was widespread in this heterogeneous sample. Awareness of LEA and the development of appropriate energy management strategies to ensure athlete health across levels of competition are required.  相似文献   

带电粒子在磁场中的运动和能量     

刘益民 《青海师专学报》2001,21(6):20-23

研究了带电粒子分别在均匀磁场、均匀变化磁场中的运动和能量。  相似文献   

Is students’ energy literacy related to their university’s position in a sustainability ranking?     

D. R. E. Cotton  J. Winter  W. Miller  L. Dalla Valle 《Environmental Education Research》2018,24(11):1611-1626

Abstract

University rankings are increasingly important internationally, and in the UK include a sustainability ‘Green League’. However, there is little evidence about experiences of studying in ‘sustainable universities’. We report an empirical study at five universities in varied positions in the Green League, exploring students’ energy literacy, environmental attitudes and perceptions of their institution’s energy-saving efforts. Although the link to energy literacy is not clear, findings suggest that there are significant differences between students’ environmental attitudes at universities placed at different points in the league. In addition, students at higher ranked universities are more positive about their university’s energy-saving efforts, suggesting that these institutions may exhibit more overt manifestations of sustainability. This is important since students report being more likely to choose energy-conservation behaviours if there is visible representation of energy use. The study is the first to attempt a comparison between universities at different positions in a sustainability ranking.  相似文献   

浅谈无功就地补偿     

赵彦婷  崔好军 《安阳师范学院学报》2002,(2):100-101

分析了就地补偿原理，介绍了补偿容量的选择方法，阐述了就地补偿的效益及其应用场合。  相似文献   

关于高压电能计量装置防窃电工作的思考     

万莉群 《科技广场》2006,(7):121-122

本文简要介绍了目前高压电能计量装置所存在的缺陷,提出了如何采用技术手段和管理手段来提高高压电能计量装置的防窃电能力。  相似文献   

基于LMDI指数分解的中国石油消费影响因素分析   总被引：7，自引：0，他引：7  

王双英  李东  王群伟 《资源科学》2011,33(4):759-765

石油消费是能源消费的重要组成部分。为全面分析我国石油消费量变化情况及其影响因素,本文利用LMDI指数分解法将影响石油消费增长的因素分解为化石能耗结构效应、非清洁能耗效应、能源强度效应和经济规模效应四个部分。分解结果表明,经济规模效应是造成我国石油消费增长的主要原因;除个别年份或省区外,我国能源强度逐年降低,清洁能源消费比例稳步增长,能源结构逐步改善,我国石油供需矛盾趋于缓和。  相似文献   

基于SQL Server的能耗监测数据库设计     

马少华  解志杰 《科技广场》2012,(4):42-44

随着当今工业生产和科学研究对数据应用要求的日益提高,数据库技术已成为控制系统重要部分。本文依据国家机关办公建筑和大型公共建筑能耗监测数据库的相关技术导则对SQLServer数据库的组成进行了总结和概述,并按照相关技术导则的要求论述了能耗数据特点与数据表格的组成,对数据库表结构设计方法作了论述。该系统可操作性强,通用性好,快捷方便。因此,该研究成果将具有广泛的发展和应用前景。  相似文献   

中国能源资源消费及其经济性分析     

穆献中  宗玉生 《资源科学》2007,29(3):94-99

本文主要针对我国石油天然气矿物能源紧缺的现状，系统分析了我国矿物能源节约利用的潜力以及世界尤其是中国周边国家能源消费的发展趋势。从能源结构的合理性、消费利用的经济性等不同角度来分析我国不可再生矿物能源消费利用的途径，并以技术、经济、环境的大量实际数据资料为依据对我国煤炭、石油以及天然气等矿物能源不同消费用途进行定量比较和分析研究，主要包括原油、天然气、煤炭资源作为一次能源、二次能源替代利用，乙醇汽油替代常规汽油，煤炭液化和石油化工，煤炭、天然气发电以及天然气化工等不同消费途径的经济和环境影响比较。在上述研究基础上，本文针对我国矿物能源资源的消费结构、替代措施、矿物能源的深加工以及能源利用效率等方面提出了相应的政策措施和建议。  相似文献   

资源获取、创业导向与新创企业绩效关系研究   总被引：1，自引：1，他引：1       下载免费PDF全文

朱秀梅 《科学学研究》2008,26(3):589-595

 本文拓展了创业导向与绩效关系的经典模型,构建了资源可获得性、创业导向、环境动态性、资源整合能力与新创企业绩效之间的关系模型,通过实证分析验证理论模型及所提出的假设。  相似文献