2013-2016版国际艺术体操评分规则难度变化的启示     

龚艳 《体育科技文献通报》2014,(6):39-40

采用文献资料和比较分析法,重点对国际艺术体操评分规则2010版和2013-2016年新版规则进行对比研究分析,从分析新规则的重要变化特点中探索深层启示。结果显示:新规则将评分板块分为难度和完成两大块,身体难度删除了波浪柔韧组,难度数量和难度级别大幅度减少;难度技术更加注重身体、器械和艺术的均衡运用,突出难度技术组合的艺术化编排。  相似文献   

体育动态分层教学实施分析与对策     

杨冠强  齐利海 《体育科技文献通报》2014,(7):63-63,112

由于我们的学生存在各种因素上的差异,所以在体育教学的过程需要教师进行分层教学。本文笔者基于教学经验、实践以及相关文献的研究成果,体育动态教学分层的内涵、分层的具体的操作等进行了剖析,并在此基础上进行了案例性的阐述,以期能给广大同行们提供一定的参考与借鉴。  相似文献   

体育规则：足球规则修改与集体项目规则的比较研究          下载免费PDF全文

Robert C.R. Siekmann 《体育科研》2014,(6):51-53

本文以法学视角,尤其是国际法视角,通过研读规则文本的方式,对足球规则的演进进行分析,并且揭示一些目前体育法领域关注的问题:体育法(lex sportiva)确实存在,包含了公法部分(国际公约、国家立法)和私法部分(体育规则);体育规则(Laws of the game)是体育法的核心,包括国家、地区以及全球范围内各级体育主管部门的章程与条例;项目规则是体育法的另一个重要核心,作者以足球为例,论证了为什么项目规则也是法的问题。  相似文献   

四川省优秀运动员职业变迁的问题解构与对策研究     

杨成波 《四川体育科学》2014,(1):16-20

社会转型背景下,基于有意行为、整体终身发展及社会学相关理论。运用社会调研、问卷调查、归纳、演绎等研究方法。对四川省优秀运动员职业变迁的现状进行调查与分析,剖析运动员职业变迁过程中存在的问题及致因。并在此基础上,提出解决运动员职业变迁问题的建议。研究显示：运动员职业生涯阶段的发展规划缺失,职业变迁的计划滞后;职业变迁准备的主动性不足,缺乏有效应对策略;文化水平低,技能单一且难以有效迁移,角色转换欠流畅;传统职业变迁路径变窄,社会支持与退役保障体系欠完善。  相似文献   

Understanding the concept of professionalisation in sport management research     

《Sport Management Review》2014,17(4):520-529

It has been 80 years since the concept of professionalisation began to take root within the sociology and management disciplines. Similarly, the study of the professionalisation of sport has a relatively prominent and longstanding history within the discipline of sport management. Notwithstanding its continued usage and importance, there has been little systematic attempt to examine how the concept has been operationalised within sport management. In light of this recognition, this review piece draws upon extant sport management, sociological and managerial literature to (i) explore the various ways in which the concept of professionalisation has been employed within sport management, and in doing so, (ii) identifies potential research gaps and future avenues of inquiry within the sport management discipline. The review identifies three broad classifications of professionalisation (organisational, systemic, occupational) and calls for more research surrounding broader conceptualisations of professionalisation that remain relatively unexplored by sport management scholars.  相似文献   

基于自由分布式FDR阈值的NSCT遥感图像去噪     

刘继红 《环球赛鸽科技》2014,(28)

提出一种新的自由分布式(FDR)假设检验阈值和非下采样Contourlet变换(NSCT)相结合的图像去噪方法。该方法首先在NSCT域利用统计学中的自由分布式错误发现率(FDR)假设检验方法来设定阈值,再通过软阈值函数进行去噪,且不依赖信号的长度。实验结果表明：该方法能够更有效地去除。感图像的高斯噪声,提高图像的峰值信噪比;同时利用NSCT变换的平移不变性抑制了去噪中的伪Gibbs失真效应,较完整地保持了图像的纹理和边缘等细节信息,从而明显改善了图像的视觉效果。  相似文献   

浅谈教学过程中的“动静之道”     

李爱梅 《环球赛鸽科技》2014,(28)

教学过程是一个系统工程,既是教的过程,又是学的过程。本文首先从辩证唯物主义动静观角度阐述教学过程中的动与静的涵义,论述教学过程中实施动静结合的必要性,指出教学过程中实施动静结合的有效性,才能保证教学质量。  相似文献   

Anticipatory postural adjustments during cutting manoeuvres in football and their consequences for knee injury risk     

Guillaume Mornieux  Dominic Gehring  Patrick Fürst  Albert Gollhofer 《Journal of sports sciences》2014,32(13):1255-1262

Abstract

Anticipatory postural adjustments (APAs), i.e. preparatory positioning of the head, the trunk and the foot, are essential to initiate cutting manoeuvres during football games. The aim of the present study was to determine how APA strategies during cutting manoeuvres are influenced by a reduction of the time available to prepare the movement.

Thirteen football players performed different cutting tasks, with directions of cutting either known prior to the task or indicated by a light signal occurring 850, 600 or 500 ms before ground contact.

With less time available to prepare the cutting manoeuvre, the head was less orientated towards the cutting direction (P = 0.033) and the trunk was even more rotated in the opposite direction (P = 0.002), while the foot placement was not significantly influenced. Moreover, the induced higher lateral trunk flexion correlated with the increased knee abduction moment (r = 0.41; P = 0.009).

Increasing lateral trunk flexion is the main strategy used to successfully perform a cutting manoeuvre when less time is available to prepare the movement. However, higher lateral trunk flexion was associated with an increased knee abduction moment and therefore an increased knee injury risk. Reducing lateral trunk flexion during cutting manoeuvres should be part of training programs seeking the optimisation of APAs.  相似文献   

Computational fluid dynamics (CFD) modeling of microclimate for salts crystallization control and artworks conservation     

《Journal of Cultural Heritage》2014,15(4):448-457

Many deterioration processes are linked to unsuitable microclimatic condition in cultural buildings. One of the most diffused processes is soluble salts crystallization that can be accelerated in masonry structures within specific microclimatic values for different chemical compounds. In this paper, microclimate and efflorescence diffusion were monitored over a one-year period in the Crypt of the Cathedral of Lecce (South Italy). This allowed to relate the microclimate with the efflorescence variation over time. A three-dimensional computational fluid dynamics (CFD) model was then developed to detail the thermo-hygrometric parameters and airflow patterns responsible for salts crystallization and artworks deterioration. Two main conditions were reproduced; one to simulate the current microclimate, which simulations showed to be inadequate for conservation, and the other to search for a more appropriate solution. In both cases, summer and winter conditions were simulated and compared to find a microclimate able to ensure more suitable thermo-hygrometric intervals required by the constituting artworks materials. The results helped to suggest actions to improve maintenance of the Crypt.  相似文献   

磁-热-流体耦合场中矩形薄板的非线性振动     

李明健  刘省勇  张年梅 《中国科学院大学学报》2014,31(6):731-738

研究薄板结构在机械载荷、磁场和温度场共同作用下的动力学行为.考虑到板受Lorentz力的作用,根据物理方程、非线性几何方程和平衡方程建立了耦合场中薄板的运动控制方程,应用Galerkin原理推导出微分动力系统,采用Runge-Kutta方法进行数值求解,绘制了薄板运动的时程图、相轨迹图和Poincare映射图,分析温度场、磁感应强度以及机械载荷形式对系统运动规律的影响.结果表明,磁场在薄板非线性运动系统中消耗能量,可以抑制非线性作用;温度场不仅改变板内热变形和热应力,而且影响薄板的运动特征;磁场和流体压力对系统动态响应的影响是相互耦合的,静压力或脉动压力的增大不仅导致振幅的增加,而且改变系统的运动特征.  相似文献