4×100m接力跑高效率传接棒技术要点分析

笔者通过对４ ×１００ ｍ 接力跑高效率传接棒技术要点的论述和分析, 提出了高效率传接棒技术的训练要点和方法, 对４×１００ ｍ 接力跑项目的教学训练提供了参考。     

800 m跑运动生物力学分析

对运动员在800 m 跑比赛中的技术动作进行生物力学分析,分析了身体重心、下肢动作、机械能量和能量有效性,其结果有利于改进技术,并为指导训练提供参考依据     

基于对数变换的灰色预测模型GM(1,1)对全运会男子100m跑成绩的预测研究

研究目的:为预测下一届全运会男子100m跑平均成绩,通过运用灰色系统理论,建立GM(1,1)预测模型。研究方法:运用灰色系统理论预测方法、数理统计法及文献资料调研,以第七届到第十二届全运会男子100m跑前三名的平均成绩作为研究对象。结果与结论:通过对数变换对原始数据处理、进行GM(1,1)建模、模型检验(残差检验、关联度检验、后验差检验),得到了合格的预测模型:X赞(0)(k+1)=(1-e0.0003824)(2.3273-6194.7929)e-0.00382473k,k=6,X赞(0)(7)=2.3233,Y赞(0)(7)=10.21(s)。即预测第十三届全运会男子100m跑前三名的平均成绩为10.21(s)。     

The Seljuk Sultanate of Rūm and the Turkmen of the Byzantine frontier, 1206–1279*

This article examines the frontier between the Seljuk Sultanate of Rūm and its Byzantine neighbours in the thirteenth century, concentrating on the place of these frontier districts within the Seljuk state. Scholarship on the frontier, influenced by the ideas of Paul Wittek, has seen it as something of a “no man's land”, politically, economically, culturally and religiously distinct from the urban heartland of the Seljuk sultanate in central Anatolia, dominated by the nomadic Turks, the Turkmen, who operated largely beyond sultanic control. It is often thought that the Seljuk and Greek sides of the border shared more in common with each other than they did with the states of which they formed a part. In contrast, this article argues that in fact the western frontier regions were closely integrated into the Seljuk sultanate. Furthermore, with the Mongol domination of the Seljuk sultanate in the second half of the thirteenth century, the Seljuk and Mongol elites became increasingly involved in this frontier region, where some of the leading figures of the sultanate had estates and endowments.     

Islamic Historians of the Ayyūbid Era and Muslim Rulers from the Early Crusading Period: A Study in the Use of History

This article examines the presentation of Muslim rulers from the early crusading period, 490–540/1097–1146 in six of the main chronicles written during the first half of the seventh/thirteenth century. It discusses the themes, ideas and topoi in each, demonstrating that the historians appear to have been divided into two ‘camps’ over their presentation of these rulers, based on their personal views of the rulers of their time. The article also examines why this division may have occurred, and considers its ramifications for modern scholarship of Arabic historiography, Islamic history and the history of the Crusades, in both the sixth/twelfth and seventh/thirteenth centuries.     

论个性心理特征对100m跑成绩的影响

100m运动是一项竞争激烈的项目,影响其成绩的因素很多,心理因素则是影响成绩的一项不可忽视的重要因素。     

世界优秀女子400m跑速度特征分析

采用动态分析法、数据统计法、因素分析法对第6、7届世界田径锦标赛女子400m决赛运动员的50m分段时间、平均速度进行分析统计。结果表明:为了防止后半程速度的下降,应延长400m跑的加速时间;8个50m分段的标准差越小匀速跑的能力越强,前3名选手都有较强的匀速跑能力;最快和最慢50m分段的时间差与运动成绩显著相关;第1名运动员启动速度较快,第2分段控制速度,在第5、6分段速度优势明显。     

世界优秀短跑运动员100m各分段步频、步长、平均速度变化规律的研究

利用数理统计法对世界优秀短跑运动员100m跑的各分段步频、步长等运动学指标进行评析，研究表明：世界优秀短跑运动员100m跑中长时间保持高速的途径是依靠自己的步长，而不是努力提高步频来保持；全程跑的加速节奏对全程的成绩有较大的影响；在各分段步长与步频对跑速的贡献具有显性差异。     

100m跑运动员体能指标研究综述

根据运动员体能结构的关系,从体能指标角度对运动员的体能进行系统地研究。结果表明,近些年来国内外对100m跑运动员的研究从整体上讲较为分散零碎,缺乏整体系统性。主要表现在这些研究多从微观入手,过多关注的是体能具体分类指标本身,从系统的观点对100m跑运动员体能水平的综合整体研究还比较薄弱。