传统运动养生文化对城镇社区体育锻炼的影响

在中国几千年的历史发展中,运动养生文化能滋生繁衍、常青不衰,有其自身的存在价值.着重探讨中国传统运动养生文化对现代社会社区体育锻炼的影响,是为了更好地继承与弘扬中国传统运动文化,继而为社区居民体质的提高和体育锻炼发展,提供宝贵的运动养生资源.讨论在城镇化进程加快的过程中,社区居民单一的生活和休闲方式,还有社区体育锻炼缺乏等方面,运用运动养生进行体育锻炼能有效增强社区居民的体质健康和丰富居民的生活方式.     

浅谈我国竞技体育的发展与变化

中国体育在世界格局中明确了第一集团的位置,但是优势项目不多,并且很难获得更大突破,在国内优势项目与区域发展也存在不均衡的表现。探讨了近些年中国体育在世界取得的成绩情况,分析了实力变化情况,以期促进我国竞技体育的可持续发展。     

Automatic measurement of key ski jumping phases and temporal events with a wearable system

We propose a new method, based on inertial sensors, to automatically measure at high frequency the durations of the main phases of ski jumping (i.e. take-off release, take-off, and early flight). The kinematics of the ski jumping movement were recorded by four inertial sensors, attached to the thigh and shank of junior athletes, for 40 jumps performed during indoor conditions and 36 jumps in field conditions. An algorithm was designed to detect temporal events from the recorded signals and to estimate the duration of each phase. These durations were evaluated against a reference camera-based motion capture system and by trainers conducting video observations. The precision for the take-off release and take-off durations (indoor < 39 ms, outdoor = 27 ms) can be considered technically valid for performance assessment. The errors for early flight duration (indoor = 22 ms, outdoor = 119 ms) were comparable to the trainers' variability and should be interpreted with caution. No significant changes in the error were noted between indoor and outdoor conditions, and individual jumping technique did not influence the error of take-off release and take-off. Therefore, the proposed system can provide valuable information for performance evaluation of ski jumpers during training sessions.     

法新社：NewsML 标准的同路人

参加IPTC北京年会的法新社多媒体实验室主任、资深媒体技术、新闻技术标准专家Laurent Le Meur先生4月3日在新华社的技术研讨会上,首先介绍了法新社的新闻业务和技术概况,他说：法新社每天播发及时、精确、深度报道,每天有遍及世界165个国家的2900名员工为其工作,每天播发视频、图片、图表和多媒体稿件,法新社每天发布的多媒体稿件达350～600篇左右,每天播发的各类新闻大多遵循了NewsML标准。     

Analysis of repeated high-intensity running performance in professional soccer

Abstract

The aims of this study were twofold: (1) to characterize repeated high-intensity movement activity profiles of a professional soccer team in official match-play; and (2) to inform and verify the construct validity of tests commonly used to determine repeated-sprint ability in soccer by investigating the relationship between the results from a test of repeated-sprint ability and repeated high-intensity performance in competition. High-intensity running performance (movement at velocities >19.8 km · h^?1 for a minimum of 1 s duration) was measured in 20 players using computerized time–motion analysis. Performance in 80 French League 1 matches was analysed. In addition, 12 of the 20 players performed a repeated-sprint test on a non-motorized treadmill consisting of six consecutive 6 s sprints separated by 20 s passive recovery intervals. In all players, most consecutive high-intensity actions in competition were performed after recovery durations ≥61 s, recovery activity separating these efforts was generally active in nature with the major part of this spent walking, and players performed 1.1 ± 1.1 repeated high-intensity bouts (a minimum of three consecutive high-intensity bouts with a mean recovery time ≤20 s separating efforts) per game. Players reporting lowest performance decrements in the repeated-sprint ability test performed more high-intensity actions interspersed by short recovery times (≤20 s, P < 0.01 and ≤30 s, P < 0.05) compared with those with higher decrements. Across positional roles, central-midfielders performed more high-intensity actions separated by short recovery times (≤20 s) and spent a larger proportion of time running at higher intensities during recovery periods, while fullbacks performed the most repeated high-intensity bouts (statistical differences across positional roles from P < 0.05 to P < 0.001). These findings have implications for repeated high-intensity testing and physical conditioning regimens.     

成人教育质量监控体系中政府机制的失调及其对策

在成人教育质量的监控体系中,政府的作用是必不可少的。通过分析政府在成人教育质量监控机制中失调的表现及其原因,进而提出完善政府监控机制的主要措施为:加强制度建设,完善相应的配套措施;创新贯彻手段,保障制度的有效实施;注重绩效评价,建立完整的评价制度;确保价值方向,整合多元的价值取向。     

因子分析与教学评价指标的确定

本文运用因子分析的方法,将某高校采用的11个教学评价指标要素转换为4个,并用简洁规范的语言描述归并后的主因素,确定了评价指标的主要素.     

女性难以走出的迷幻花园--论苏童的小说《红粉》

苏童的《红粉》从一个与众不同的角度揭示了妓女在改造过程中鲜为人知的辛酸与苦涩。出身下层又不愿自力更生的女性在社会中总是被迫以“性——金钱”的方式生存着,妓女的改造不仅意味着她们自身的改造也包括普通人的道德观念的改造。社会要求她们改造,但社会又不接受她们,她们依然在社会的边缘游走。     

数学与逻辑

分析了数学和逻辑学的关系。认为数学和逻辑学是两个不同的学科,人们很多时候把数学和逻辑联系在一起,是因为它们的"交集"很广泛,数理逻辑就是数学与逻辑学有机结合的产物。一个人的逻辑思维能力是十分重要的,关系到学习和工作的成效,甚至关系到事业的成败。充分认识数学教育在培养逻辑思维能力中的重要作用对提高公民的逻辑思维能力是非常必要的。     

安全电子商务协议的形式化分析

阐述了安全电子商务协议的安全属性,介绍了重要的安全电子商务协议,总结了近年来安全电子商务协议形式化分析方法的研究进展情况。文章最后对该领域主要的研究方向进行了展望。