改革开放40年来体能相关研究的知识图谱分析     

赵李 《体育科技文献通报》2020,(5):131-135

本文运用CiteSpace V可视化应用软件,以"体能"为研究主题从CNKI数据库中16本体育核心期刊发表的文献中检索出1979-2018年中977篇文献作为研究数据,绘制体能研究领域的知识图谱,并分析我国体能领域研究的现状和研究的热点。结果显示:本研究领域呈抛物线走势,2010年开始缓慢下降;体能、体能训练、二元训练理论和项群理论一直是众多学者关注的重点;国内学术研究团体逐渐形成,重要作者有茅鹏、曹景伟、张洪潭、袁运平等作者;体育类院校是该领域重要研究力量。  相似文献   

S Minakshisundaram: A glimpse into his life and work     

S Thangavelu 《Resonance》2003,8(1):41-50

  相似文献   

现代汉语N+V状中短语的句法功能与语义指向分析     

李亚丽 《玉溪师范学院学报》2006,22(8):86-89

现代汉语中,名词能够与动词组合构成N+V状中短语,其性质是动词性的,在句中能作谓语、定语、主语和宾语。N+V状中短语在作谓语时,其中的名词性状语N从语义指向上看,有时指向谓语动词V,有时指向结构中的其他名词性成分。  相似文献   

Effectiveness of physical education to promote motor competence in primary school children     

Vítor P. Lopes  David F. Stodden  Luis P. Rodrigues 《Physical Education & Sport Pedagogy》2017,22(6):589-602

Background: Motor skill (MS) competence is an important contributing factor for healthy development.

Purpose: The goal was to test the effectiveness of primary school physical education (PE) on MS and physical fitness (PF) development.

Methods: Three classes (n?=?60, aged 9.0?±?0.9) were randomly assigned to three diverse conditions during a school year: two PE lessons/week (PE-2), three PE lessons/week (PE-3), and no PE lessons control group (CG). BMI, skinfolds, PF (9-min run/walk, sit-up, modified pull-ups), gymnastics, soccer, handball, basketball and track-and-field skills were evaluated. Effect sizes (d) were reported as magnitude of change.

Results: Skinfolds significantly increased only in CG (d?=?1.21). PF composite z-scores improved in PE-3 (d?=?0.61), but decreased in PE-2 (d?=?0.57), and had no changes in CG. Statistically significant improvement was verified in gymnastics and handball skills in both experimental groups (gymnastic: d?=?2.95 and d?=?2.61 for PE-3 and PE-2, respectively; handball: d?=?1.87 and d?=?0.57 for PE-3 and PE-2, respectively), and no changes were seen in CG. In soccer, there were improvements only in the PE-3 (d?=?0.55), and in basketball only in PE-2 (d?=?0.46). There were no changes in any group for track-and-field skills.

Conclusions: PE programs can effectively promote PF and MS development.  相似文献   

Parents' views of the efficacy of conductive education in Sweden     

Lena Lind 《欧洲特需教育杂志》2013,28(1):42-54

Parents of children who have participated in a conductive education programme in Sweden were asked questions about their reasons for choosing the programme, the expectations they had of it and how they were fulfilled. The results showed that the parents were satisfied with the development of their child, and wanted to continue to take part in further courses with their child. They appreciated the intensive training and found it motivating and enjoyable for the child. They wanted an intensive training for their child because they believed that active training could help the child to develop. The parents learned more about cerebral palsy at the courses and now understood why and how they could train their child. Most of the parents continued the training at home with the child. They experienced financial difficulties in participating in further courses, and found it difficult to stay away from work and family for a long period of time.  相似文献   

汽车电气系统采用高电压供电方案的可行性论证     

白雪  张兵 《黑龙江科技信息》2010,(28):18-18

介绍了汽车使用42V电源供电的优点和发展趋势,分析了汽车42V电源的电气系统的结构特点,并提出了采用高电压供电的两种解决方案。虽然汽车业完全采用和实现42V电源技术会遇到许多困难,但是汽车电源技术由传统的14V标准向42V转化已经成为汽车工业发展的必然趋势。  相似文献   

一种基于云芯一号的OpenStack块存储加速方案     

王界兵  王文利  董迪马 《教育技术导刊》2019,18(12):89-92

为了改善传统OpenStack平台在非对象存储上存储效率低下、存储方式单一等缺点,基于自主研发的云芯一号（Cloud Core V1.0）,在多节点分布式OpenStack云平台上研发基于云芯一号的块存储加速体系结构,并进行试验部署。研究结果表明,基于云芯一号的块存储加速方案,增加了OpenStack块存储的存储对象种类;在块存储前进行文件硬件压缩处理,极大提升了块存储的存储速度和安全可靠性;基于云芯一号的OpenStack块存储加速方案不仅能快速有效地对非对象存储资源进行安全有效存储,而且为存储前的节点调度和资源监控夯实了基础。  相似文献   

奈保尔的旁观者写作视角与象征写作手法     

郭先进 《培训与研究》2007,24(3):15-17

V.S. 奈保尔是当代后殖民文学的重要作家。在作品中,书写第三世界人民寻找文化归属和建设家园所面临苦难时,他采用孤独旁观者的视角。同时,奈保尔艺术化地运用象征写作手法,以加深、加强他的写作主题。  相似文献   

基于ArcGIS平台的1：1000地形数据库的建立     

张新利  高东生高鹏 《咸阳师范学院学报》2007,22(2):44-47

以油田1:1000地形数据库建立为例,介绍了巧选不同特色软件,高效完成从数据获取、数据编辑、数据转换到数据入库的方法,达到快捷、方便建立GeoDatabase数据库。通过在大量建库项目中使用,从建库速度和质量方面达到了今人满意的效果。  相似文献   

基于交-交变频技术实现异步电动机重载起动的研究     

雷慧杰  张艳伟 《安阳工学院学报》2007,(4):18-21

为解决异步电动机重载起动存在的不足,提出了一种以80C196KC DSP为控制技术的交-交变频系统的实现方法.该方法具有起动电流小、启动转矩大、启动平滑、运行稳定、控制效果好的特点,详细阐述系统主电路及控制部分的原理和实现方法.  相似文献