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本文运用灰色理论中的关联分析法，对跳高运动员赵宁各项素质进行了综合分析，找出了影响运动员成绩提高的主要因素；并运用了灰色理论的灰色模型方法，建立了专项成绩的灰色GM(1，1)预测模型，运用该模型对赵宁2004年和2005年的运动成绩进行了预测。 相似文献
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对于单项未来运动成绩的预测来说 ,运动成绩的发展趋势是由多因素决定的 ,有的已知 ,有的未知 ,不确切或模糊 ,若将运动成绩中已知、未知的影响因素看作一个系统。那么 ,它就是一个典型的灰色系统 ,可以运用灰色理论中的灰色模型方法 ,对原始的无规律或规律不明显 ,不够确切的数据进行加工处理 (即ＡＧＯ生成 ) ,使之变为较有规律或更为确切 ,再利用生成后的数据进行分析建模。然后 ,运用该模型进行未来运动成绩预测。因此 ,本文运用灰色理论中的灰色Ｇｍ(1,1)模型方法 ,建立了男子 4 0 0ｍ栏世界纪录和全国纪录的灰色Ｇｍ(1,1)模型方法 ,建立了男子 4 0 0ｍ栏世界纪录和全国纪录的灰色Ｇｍ(1,1)预测模型 ,对未来运动成绩中长期预测和决策提供信息。1 研究方法文献法 :收集整理了男子 4 0 0ｍ栏 1972～ 1999年世界纪录和 1981～ 1999年全国纪录。数据统计法 :运用奔腾Ⅲ - 5 0 0微型计算机建立了男子 4 0 0ｍ栏世界纪录和全国纪录的灰色Ｇｍ(1,1)模型 ,并进行了后验差检验和关联度分析。2 灰色建模2 1 确定灰色模型的类型灰色模型一般是ｎ阶ｈ个变量 ,记为Ｇｍ(ｎ ,... 相似文献
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针对运动成绩变化规律的未知性、不确切性和模糊性等特点 ,运用灰色系统理论中的灰色模型方法 ,建立了女子 10 0 m栏世界和全国纪录的等维灰数递补 GM(1,1)预测模型 ,并进行了后验差检验。结果表明 ,模型的精度均为一级。使用该模型对 2 0 0 5年该项运动成绩进行了预测 相似文献
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运用R型因子分析方法对我国著名速滑运动员于净身体素质进行定量分析与研究 ,探讨影响速滑运动成绩的相关因素 ,揭示其内在规律。同时 ,运用灰色系统理论中的等维灰数递补GM模型方法 ,建立了于净速滑专项成绩和身体素质指标的预测模型 ,用该模型建立 2 0 0 1～ 2 0 0 3年度短期训练目标。然后 ,用灰色关联分析法对于净专项运动能力进行优势分析。 相似文献
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针对运动成绩变化规律的模糊性、未知性等，运用灰色系统理论的灰色模型方法，建立了男子跳远全国纪录的等维灰数递补GM(1，1)预测模型，并进行后验差检验和关联度分析。结果表明，预测模型精度为一级(GOOD)。同时，运用该预测模型对2002年跳远成绩进行预测。 相似文献
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我国十项全能运动成绩的因子分析及灰色系统回归预测研究 总被引：10，自引：0，他引：10
综合运用因子分析、灰色系统及多元回归理论研究了我国十项全能运动成绩的内部结构，找出影响我国该项运动成绩的主要原因，并根据因子分析的结果建立了我国运动员成绩的灰色系统回归预测模型，旨在为制订田径项目的训练计划和进行科学训练提供参考。 相似文献
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采用文献资料法和灰色系统理论中的灰色模型方法 ,建立了女子 40 0m栏世界纪录和全国纪录的灰色GM ( 1,1)预测模型 ,并进行了后验差检验。结果表明 ,预测模型精度为一级 ,它可以用来揭示运动成绩的系统规律。 相似文献
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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. 相似文献
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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。 相似文献
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John W. Chow Duane V. Knudson 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):219-233
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. 相似文献
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因子分析在学生十项全能成绩分析中的应用 总被引：2，自引：0，他引：2
王文初 《武汉体育学院学报》2003,37(5):80-81
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。 相似文献
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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。 相似文献
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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. 相似文献
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The purpose of this study was to quantify the global match demands of international rugby sevens and to compare the match demands of forwards and backs, and between tournament rounds. To assess the match demands, global positioning system (GPS) and video analysis were collected from 27 international rugby sevens players from the same team across an entire International Rugby Board Sevens World Series season. Differences in running demands and match activities between forwards and backs were mostly trivial and small (ES = 0.05–0.84) while differences in running demands and match activities between Pool and Cup rounds were trivial (ES = 0.001–0.12). Cup round matches showed an increase in long-duration ball-in-play sequences (proportion ratio 0.46). These findings suggest international rugby sevens forwards and backs experience similar match demands while overall match demands remain consistent across tournament rounds. 相似文献
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广西民族体育旅游的SWOT分析与战略选择 总被引：22，自引：0，他引：22
运用SWOT分析方法,客观地对广西民族体育旅游的内部优势和劣势、外部环境带来的机遇和挑战进行了分析,在此基础上提出了发展广西民族体育旅游的“一统二化三结合”的战略选择。 相似文献
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再论推铅球的最后用力 总被引：9，自引：0，他引：9
在对推铅球最后用力概念界定的基础上 ,重新划分推铅球最后用力的阶段。查阅了国内外有关的文献资料 ,在此基础上进行数理统计分析 ,提出了划分推铅球最后用力阶段的新理论 :推铅球最后用力阶段是从支撑脚着地后积极蹬伸产生向前水平支撑反力开始到铅球离手的过程。整个最后用力阶段分为单支撑和双支撑 ,单支撑最后用力阶段对左趾向前水平位移、身体重心速度水平向前增量有积极的作用 ,促进左脚积极着地进入双支撑最后用力阶段。在训练中选择提高下肢离心 -向心收缩能力的练习 ,提高力量训练效果。 相似文献