中国群众体育参与的影响因素及驱动力研究简

采用主成分分析与因子分析法,对影响群众体育参与的10个因素进行数据矩阵分析。旨在准确把握中国群众体育参与影响因素和特征。分析确定主成分：驱动因子2个。包括：政府支持和体育发展因子、生活水平与文化素质因子。结果表明,政府支持和体育发展是群众体育参与的基础和保障,生活水平与文化素质影响群众对体育参与的规模与主动性。     

我国篮球裁判员临场心理稳定性影响因素的分析

本文采用问卷调查的方法,对影响我国篮球裁判员临场心理稳定性的影响因素,进行了分析。结果显示,影响我国篮球裁判员临场心理稳定性的四个主成分因子分别为:比赛因子、社会因子、环境因子、技术因子。文章还对不同级别、性别、年龄组的裁判员受这四个主成分因子影响的状况进行了对比分析。     

体育科研常见统计误用（六）——分析变量结构时的问题

1混淆主成分分析和因子分析1.1现象例如,有论文题目为:“铅球滑步阶段的主成分分析”“主成分分析在体质综合评价中的应用”等,但内容用的却是因子分析,也没有用到主成分。又如在文章作这样的表述:“运用主成分分析与R型因子分析法,从粗选指标中选取4个主成分,并进一步进行R型因子分析,比较不同水平运动员的因子差异。”而事实上只是用主成分法提取因子作了因子分析。再如有文章对影响CUBA竞技水平     

优秀气手枪运动员瞄扣技术与射击成绩的关系研究

瞄扣技术是气手枪射击的关键技术,为研究瞄扣技术与射击成绩的关系,采用SCATT激光测试仪采集我国优秀气手枪运动员瞄扣技术相关指标,运用主成分回归分析对相关数据进行统计处理。研究发现(1)持枪稳定性、瞄准精度、瞄准时间、瞄扣协调性4个主成分对射击成绩影响最大,能够全面反映瞄扣技术。(2)通过主成分回归分析建立了射击成绩与瞄扣技术各指标的回归模型,该模型可解释射击成绩82.5%的方差,并就瞄扣技术对射击成绩的影响进行探讨,可以为教练员制定训练计划提供参照。     

主成分与因子分析在体育综合评价中的应用检测

通过对主成分与因子分析在综合评价中的应用检测，发现存在3个方面的问题，即误用认知数据；主成分与因子的遗漏现象；评价权重的确定不客观。提出对遗漏因子的检测和处理方法，建议用因子分析结合专家法确定综合评价中的权重。     

基于主成分分析 因子分析与聚类分析运动员的运动能力评价方法研究

本文以全国排球联赛部分男子排球队员为研究对象,选取了37个变量作为分析基础,采用主成分分析法提取5个主成分综合存在于各变量中的信息,并通过极大似然法提取主因子,以最大方差法旋转因子荷载,得到因子得分筛选显著变量,其中第一显著因素和第二显著因素在重要性排位中位居前列,分别代表影响运动员运动成绩的心理因素和技能因素。最后通过计算因子得分和综合得分,通过聚类分析对运动员进行等级评价,分值的高低确定等级高低。     

影响广州市老年人体质健康状况的主成分分析

对广州市老年人体质的13项测试指标的结果进行主成分分析,试图分析影响广州市老年人体质健康状况的主要指标,揭示各主要指标相互之间的关系。结果表明:影响老年人体质的因子主要是体成分因子、运动机能因子、神经系统因子、心脏血管机能因子。     

影响陕西省田径竞技后备人才的主成分分析

采用问卷调查、专家访问、文献资料、以及逻辑分析的方法,从社会学的角度,对影响陕西省田径竞技后备人才的主成分进行了详尽的分析,其中训练因子、管理因子、经费因子、科教支持因子和教练能力因子是影响陕西省田径后备人才发展的主要因素,造成陕西省田径后备人才发展落后与陕西省经济发展有关外,但与科教文化因素不相对应。     

基于马氏距离的模糊支持向量机及其在用户行为识别中的应用研究

基于支持向量机的分类原理,对具有显著不平衡性的用户行为数据进行分析,旨在探索一种利用用户浏览商品网页时的行为特征,识别用户关于商品品牌购买偏好的方法。文章提出一种基于马氏距离的高维空间类中心隶属度构建方法,将该方法与支持向量机和基于欧式距离的高维空间类中心隶属度的模糊支持向量机进行比较,通过一组对比实验,证明该方法用于对用户行为偏好识别的有效性和优越性。     

关于主成分分析在体育科研中应用的思考

采用文献与统计分析相结合的方法．对体育科学研究中应用主成分分析存在的问题进行探讨．提出提高主成分分析的效果，要结合研究目的分析数据“相关”的实际意义，同时注意数据的信息量和数据的类型、结构的影响。     

对我国学生体质状况的灰色关联聚类分析

以灰色系统理论中的关联分析方法为基础,建立了基于关联度的聚类分析方法,并应用该方法对1995年全国汉族7~22岁男性学生的体质进行了聚类评价,结果表明：我国大学阶段的各年龄组学生群体体质处于最优这一层次;高中阶段的各年龄组学生群体体质处于最差层次;初中阶段的各年龄组学生群体体质处于中等层次;小学阶段的各年龄组学生群体体质分属于优、中、劣之间。同时显示出,该方法计算简捷,结果直观清晰,从而为体质的综合评价提供了一种新的量化方法。     

Use of deterministic models in sports and exercise biomechanics research

A deterministic model is a modeling paradigm that determines the relationships between a movement outcome measure and the biomechanical factors that produce such a measure. This review provides an overview of the use of deterministic models in biomechanics research, a historical summary of this research, and an analysis of the advantages and disadvantages of using deterministic models. The deterministic model approach has been utilized in technique analysis over the last three decades, especially in swimming, athletics field events, and gymnastics. In addition to their applications in sports and exercise biomechanics, deterministic models have been applied successfully in research on selected motor skills. The advantage of the deterministic model approach is that it helps to avoid selecting performance or injury variables arbitrarily and to provide the necessary theoretical basis for examining the relative importance of various factors that influence the outcome of a movement task. Several disadvantages of deterministic models, such as the use of subjective measures for the performance outcome, were discussed. It is recommended that exercise and sports biomechanics scholars should consider using deterministic models to help identify meaningful dependent variables in their studies.     

因子分析在学生十项全能成绩分析中的应用

应用SPSS统计软件，对常德师院体育教育专业122名男生十项全能成绩进行了因子分析。用主成分法提取4个公因子，第1公因子支配100m、400m、1500m和110m栏，反映了速度和耐力；第2公因子支配铅球、铁饼和标枪，反映了上肢爆发力；第3公因子支配跳远和跳高。反映了下肢弹跳力；第4公因子支配撑杆跳高，反映了综合素质；根据学生的因子得分可将学生分为速度耐力型、上肢力量型、下肢力量型和综合素质型4类。     

Developing a Scale of Perception of Sexual Abuse in Youth Sports (SPSAYS)

A scale was developed to measure perceptions of sexual abuse in youth sports by assessing (a) the perceived prevalence of sexual abuse committed by pedophilic youth sport coaches, (b) the perceived likelihood that a coach is a pedophile, (c) perceptions on how youth sport organizations should manage the risk of pedophilia, and (d) media influence on participant perception. Two studies were conducted for (a) the formulation of the conceptual framework, (b) the development of preliminary items, (c) an exploratory factor analysis, and (d) a confirmatory factor analysis, and structural equation modeling. The first data set (n?=?223) was used for exploratory factor analysis, and four factors (i.e., Management, Prevalence, Influence, and Likelihood) with 15 items emerged. With an independent sample (n?=?209), confirmatory factor analysis and structural equation modeling were conducted and found strong support for the scale's psychometric properties, including, convergent validity, predictive validity, and reliability. Theoretical and practical implications were discussed along with study limitations and suggestions for future studies.     

三级跳远三跳起跳技术的生物力学分析

采用每秒100幅(LOCAM型)高速扫描摄影方法,现场拍摄了北京亚运会男子三级跳远银牌得主邹四新和1991年全国田径冠军赛金牌获得者赵本宏在同一次比赛中的三跳起跳技术影片。经数据化处理,对解析后的技术参数(15项)进行生物力学分析,并与世界优秀运动员相对照,寻找三跳技术中合理的和错误的方面,探索各技术参数间的内在联系与规律,借以找出改进技术的方法,实施最优化训练。     

Performance analysis in football: A critical review and implications for future research

Abstract

This paper critically reviews existing literature relating to performance analysis (PA) in football, arguing that an alternative approach is warranted. The paper considers the applicability of variables analysed along with research findings in the context of their implications for professional practice. This includes a review of methodological approaches commonly adopted throughout PA research, including a consideration of the nature and size of the samples used in relation to generalisability. Definitions and classifications of variables used within performance analysis are discussed in the context of reliability and validity. The contribution of PA findings to the field is reviewed. The review identifies an overemphasis on researching predictive and performance controlling variables. A different approach is proposed that works with and from performance analysis information to develop research investigating athlete and coach learning, thus adding to applied practice. Future research should pay attention to the social and cultural influences that impact PA delivery and athlete learning in applied settings.     

跆拳道横踢动作下肢肌群工作特点分析

从生物力学角度出发 ,结合跆拳道横踢技术动作的结构特点进行了剖析 ,研究了参与下肢动作的主要肌群及工作特点 ,旨在为跆拳道教练员科学地、有针对性地训练提供依据     

Patterns of barbell acceleration during the snatch in weightlifting competition

The purpose of this study was to determine the association between weightlifting performance and vertical barbell acceleration patterns. Barbell kinematic time-series data were tracked from 18 snatches from six weightlifters during a regional weightlifting competition. These data were used to calculate vertical barbell accelerations. Time-series data were normalised to 100% of lift phase, defined as the time interval between barbell lift-off and maximum height of the barbell during each snatch lift. The time-series data were then entered into a pattern recognition algorithm that extracted principal patterns and calculated principal pattern scores. Body mass-normalised lift weight, which was used to quantify weightlifting performance, was significantly correlated (r = 0.673; P = 0.033) with a pattern that captured a difference in peak vertical barbell acceleration between the transition and the second pull phase. This correlation indicated that barbell acceleration profiles of higher weight snatch lifts were characterised by smaller decreases in acceleration during the second knee bend and smaller peak acceleration during the second pull phase. Weightlifting coaches and sports scientist should monitor and track vertical acceleration of the barbell, with focus on acceleration profiles that limit (1) deceleration during the transition phase between the first and second pull and (2) peak acceleration during the second pull phase of the snatch.     

基于政策工具视角下我国体育消费政策分析——基于37份国家政策文本的内容分析(2014-2019)

体育消费既是体育产业高质量发展的核心动能,也是我国消费领域的新兴力量,而体育消费政策对体育消费发展具有重要引领作用,是体育消费发展的助推器。通过政策工具视角,对46号文件颁布以来的37份国家层面的体育消费政策文本进行内容分析,构建三维立体分析框架,进行多维交叉分析,剖析目前体育消费政策体系中政策工具的运用情况,为日后体育消费政策制定与优化提供合理化建议。