Skating start propulsion: three-dimensional kinematic analysis of elite male and female ice hockey players

The forward skating start is a fundamental skill for male and female ice hockey players. However, performance differences by athlete’s sex cannot be fully explained by physiological variables; hence, other factors such as skating technique warrant examination. Therefore, the purpose of this study was to evaluate the body movement kinematics of ice hockey skating starts between elite male and female ice hockey participants. Male (n = 9) and female (n = 10) elite ice hockey players performed five forward skating start accelerations. An 18-camera motion capture system placed on the arena ice surface captured full-body kinematics during the first seven skating start steps within 15 meters. Males’ maximum skating speeds were greater than females. Skating technique sex differences were noted: in particular, females presented ~10° lower hip abduction throughout skating stance as well as ~10° greater knee extension at initial ice stance contact, conspicuously followed by a brief cessation in knee extension at the moment of ice contact, not evident in male skaters. Further study is warranted to explain why these skating technique differences exist in relation to factors such as differences in training, equipment, performance level, and anthropometrics.     

世界男子排球锦标赛发展研究

采用文献资料法、数理统计法、专家访谈法等方法对男排世锦赛的竞技格局和发展特征进行研究.得出,各大洲整体竞争格局:欧洲对奖牌的垄断格局被打破,形成了欧洲、南美洲、中北美洲争霸的局面,但欧洲仍占有绝大部分的奖牌;各国整体竞争格局:大多传统强国依然强大,但竞争加剧;伊、德、塞、阿等近年来实力上升,与传统强队的差距明显缩小;荷、日、韩、中等实力相对下降.排球世锦赛发展特征:世锦赛赛制不断完善,但仍有不足;近年来参赛队伍迅猛增加,竞争日趋激烈;排球技术趋向全面、战术互相糅合、体能拥有高度,强调速度和力量的方向发展;高科技手段不断引入.     

Guangzhou Opera House： A Theatre That Has Changed A City

＂Architecture is music in space, as it were a frozen music. ＂A theater is a perject mix of the two. The past three years has seen the construction of numerous theatres around China. They are not only cultural landmarks, but also bear significant economic and social implications. It is the joint responsibility of builders, operators and managers to make them cultural icons that play a key role in promoting local cultural and art development. The reporter recently visited Guangzhou Opera House, put in use jbur years ago, in order to find its success in bringing cultural experience Jor local citizens.     

Deterioration of Yungang Grottoes: Diagnosis and research

Yungang Grottoes, in Datong City of Shanxi Province, China, as the state-level key cultural relic preservation organ, have been subjected to severe degradation due to natural and human factors over the years. Since January 2010, site investigation and research on Yungang Grottoes, assisted by the Xi’an Relics Protection Center and Yungang Grottoes Cultural Research Institute, have been carried out in the laboratory of cultural relics conservation materials in Zhejiang University. Our investigation of the deterioration characteristics of these grottoes is presented here. The paper describes about 12 types of diseases in detail represented by dust deposit, salt crystallization and black crust. Relevant samples have been collected and analyzed by means of SEM, FT-IR, XRD and EDAX to study the potential hazard to the sandstones and conservation methods, which could be used to help guide remediation efforts directed at reducing the weathering problem.     

上海市一线运动员心理服务需求现状调研

目的:了解上海市一线运动员存在的心理困扰及应对方式、对运动队心理辅导内容和方式的期待,提出心理服务工作设想。方法:对562位运动员进行问卷调查。结果:上海市一线运动员对心理知识的了解程度低;在训练比赛中的心理困扰主要有担心失误、运动成绩长期没有进步、缺乏比赛信心等,在日常学习生活中主要困扰为未来的职业发展与人生规划、伤病问题、失眠、情绪控制不佳等;运动员对提高运动表现的心理技能训练、兴趣爱好培养、人际交往沟通等辅导内容感兴趣,偏向一对一心理咨询和集体辅导活动方式;不同年龄段、项目的运动员心理困扰、应对方式及其期待的心理辅导内容方式存在差异。结论:运动员心理服务中不能忽视心理健康教育,需以问题为导向设计辅导内容,注重普遍性和特殊性结合。     

优秀竞走运动员江姗姗冬训训练负荷研究

冬训是全年训练周期中唯一不受竞赛期影响,可长时间进行系统训练的准备期,对于提高运动员竞技能力和运动成绩尤为重要。以优秀女子竞走运动员江姗姗为研究个案,运用实地调查法、数理统计法对江姗姗2020年冬训期训练情况进行梳理和总结,探析其冬训期训练负荷和生理指标变化的特点和规律,旨在为竞走项目冬训期科学化训练提供有益参考。     

大同市博物馆之城建设的现状调查和发展思路

近年来大同市博物馆之城建设得到快速发展,规模初具,但是在建设过程中也存在博物馆未定级、空间布局不合理以及社会影响力弱等问题。本文立足于大同市博物馆之城建设的现状调查,提出大同市基于其丰富的文化和工业遗产资源的建设思路,并在此基础上,提出大同市博物馆之城的建设路径:在发展过程中明确定位,突出民族融合的主题;加强文化遗产和非遗的联动,兼顾区域平衡;发挥产业特色,推动生态转型,最终实现大同博物馆之城建设的高质量发展。     

提高工科研究生科研素质的实践

哈尔滨工业大学环境生物研究中心以科研道德素质为起点,通过使用试验记录本、严把开题报告关、建立研究生实验室档案、实验技能培训与考核、实验室安全管理、学术例会、支持对外会议交流等制度和建立网站,创造良好科研工作条件,培养研究生严谨的科研作风、创新能力和科研实践能力、提高交流能力、促进团队合作和资源共享、提高管理效率.     

长治学院大学生乒乓球爱好者消费的现状研究

随着1890年乒乓球运动的诞生,乒乓球的普及范围和程度越来越高,它是一项全身型体育运动项目,具有极大的锻炼价值。培养思维操作能力、增强智力、培养心理素质、治疗近视等这些优势已成为长治学院大学生乒乓球爱好者选择这一运动的主要因素,近年来乒乓球在各大高校发展日益壮大,乒乓球运动越来越受欢迎,一是让学生掌握乒乓球锻炼的技能和方法;二是增强体质、增进健康,体验乐趣;除此之外,乒乓球技术的灵活性与多样性,让大学生的课外学习生活变得更加具有趣味性。为了更好的使乒乓球运动的开设在高校得到普及,让更多的乒乓球爱好者参与其中。本文主要采用文献资料法、问卷调查法、访谈法、数理统计法、逻辑分析法,对长治学院大学生乒乓球爱好者消费的现状进行了相关研究。     

中外男子篮球组织后卫传球技术运用对比分析

运用录像观察法、数理统计法等,对伦敦奥运会的中外男篮主力组织后卫的传球技术运用进行比较分析。结果显示:中国组织后卫在传球方式上运用的次数与国外组织后卫有明显的差距;在传球状态上,移动传球次数和跳起传球次数上均落后于国外组织后卫,两者有一定的差距;在传球路线上,直线传球次数落后于国外组织后卫,两者存在较大差距;中国组织后卫在解围性传球次数、攻击性传球次数和助攻次数上均落后于国外组织后卫,但中国组织后卫传球失误较少。