基于波束扫描的DBF天线方向图测试方法     

周建卫  李道京  胡烜 《中国科学院大学学报》2016,33(4):542-547

DBF天线安装后，一般不具备可机械旋转的常规测试条件。研究DBF天线方向图的间接测试问题，提出一种基于波束扫描的测试方法，给出其测试原理和测试流程。针对波束宽度、副瓣水平和波束指向等天线主要参数，用仿真比对该方法与常规方法的测试结果和误差。在DBF天线方向图正常和异常两种情况下，两种方法可得到相近的仿真测试结果，证明间接测试方法的有效性。  相似文献   

太原市城中村体育公共服务均等化的实证研究     

贾雅婕  韩雨梅 《吉林体育学院学报》2016,(1):50-56

调查城镇化建设中太原市城中村体育公共服务的发展现状，全面反映太原市城中村公共体育均等化发展的概况，揭示太原市城中村公共服务的发展规律及其制约因素，为太原市积极推进体育公共服务均等化提供理论基础和决策参考。本研究从太原市6个区域内的173个城中村中分层选取6个城中村做为研究对象进行研究。通过问卷调查，因子分析等数理统计法方法，找出影响太原市城中村体育公共服务均等化的因子：外在因子、内在因子、基本因子、性别与资源共享因子和意识形态因子五种因子。应重视太原市城中村体育基础设施建设，满足体育健身需求之间的矛盾，调动居民参与体育健身娱乐的积极性，扩大金费来源，促进太原市城中村的体育事业的发展。  相似文献   

乔伊斯短篇小说《姐妹》的功能文体学分析     

郭文超 《岳阳职业技术学院学报》2011,26(5):92-94

《姐妹》是乔伊斯小说的开篇之作,国内外文学评论多从主题研究和叙述特色来分析此小说,其实从功能文体学的角度来分析《姐妹》的文体特色,则能发现《姐妹》语言的选择与主题思想的体现十分紧密的契合在一起,这对深化理解小说的瘫痪主题以及对乔伊斯作品的深层次地理解具有重要意义。  相似文献   

陌生男性称谓语的语用分析     

石成成 《四川教育学院学报》2011,27(7):37-39

如何正确得体地称呼陌生人是一个虽然困难但又不可回避的问题。文章主要讨论对陌生男性的称谓语,试图揭示一些常用的陌生男性称谓语的利弊,分析其称呼难的原因并提出相应的解决策略,希望能对人们的日常交际有所帮助。  相似文献   

The use of player physical and technical skill match activity profiles to predict position in the Australian Football League draft     

Carl T. Woods  James P. Veale  Neil Collier  Sam Robertson 《Journal of sports sciences》2017,35(4):325-330

This study investigated the extent to which position in the Australian Football League (AFL) national draft is associated with individual game performance metrics. Physical/technical skill performance metrics were collated from all participants in the 2014 national under 18 (U18) championships (18 games) drafted into the AFL (n = 65; 17.8 ± 0.5 y); 232 observations. Players were subdivided into draft position (ranked 1–65) and then draft round (1–4). Here, earlier draft selection (i.e., closer to 1) reflects a more desirable player. Microtechnology and a commercial provider facilitated the quantification of individual game performance metrics (n = 16). Linear mixed models were fitted to data, modelling the extent to which draft position was associated with these metrics. Draft position in the first/second round was negatively associated with “contested possessions” and “contested marks”, respectively. Physical performance metrics were positively associated with draft position in these rounds. Correlations weakened for the third/fourth rounds. Contested possessions/marks were associated with an earlier draft selection. Physical performance metrics were associated with a later draft selection. Recruiters change the type of U18 player they draft as the selection pool reduces. juniors with contested skill appear prioritised.  相似文献   

体育社团自治在政府购买服务中的角色研究          下载免费PDF全文

王扬 《体育科研》2017,(4):1-7

在推广政府购买服务的大背景下，各级政府都乐于将体育社团选定为承接主体。但是当前的体育社团在社团设立、机构设置、业务活动开展、经费来源、内部章程、运行机制等方面都存在着种种困难。这种自治困境既使政府购买服务缺乏竞争环境，也使政府购买服务的合同制管理难以实现。因此，提出通过主张体育社团的自治制度设计、区分政府购买体育社团自身职能范围之服务、政府购买服务的行政合同法律关系之构建，将体育社团自治嵌入到政府购买服务的大背景中。  相似文献   

国际羽毛球专利技术竞争情报的可视化分析   总被引：1，自引：0，他引：1  

邢双涛 《北京体育大学学报》2016,39(7):45-51

摘要：为了解国际羽毛球专利技术的发展情况，运用文献资料法、知识图谱可视化分析等方法，利用文献计量可视化软件CitespaceⅢ对从《德温特创新索引》专利数据库收集的3 985篇国际羽毛球专利文献（1963-2015年）进行可视化分析，并以可视化图谱的形式呈现出羽毛球专利的时间、学科领域、专利权人、发明人、热点技术领域及核心专利领域的分布特征。研究结果显示：1963-2015年国际羽毛球专利的申请量一直处于平稳增长趋势；研究领域主要分布在仪器、体育科学、化学、工程设计、高分子科学、材料科学、计算机科学、交通运输、农学、建筑工程学、通信技术、综合内科医学、冶金及冶金工程学、能源与燃料科学、成像科学与摄影技术、光学领域、药物学及制药业领域等17个学科领域；主要专利权人和核心专利主要集中在美国、日本的一些大型企业中；热点专利技术领域主要集中在羽毛球的球拍构造、球、球弦、球网的绷紧和调解装置等比赛器材的研发以及比赛照明装置等方面。力争获取羽毛球专利研发的热点领域信息，服务相关企业和研发机构。  相似文献   

声像档案服务体系的发展现状及未来走向     

王雪飞 《保山学院学报》2016,(6):101-104

随着社会的发展，声像档案服务体系的微观构成要素进入了快速成长的阶段，为该体系在宏观层面的成熟壮大奠定了不可缺少的基础。以此为研究对象，探讨了目前我国声像档案服务体系的发展现状及其存在的问题，从而给出相应的对策建议，以期为该体系的未来走向提供一定的参考。  相似文献   

EUROPEAN DISSERTATION SUMMARIES     

Mijung Kim  Aik‐Ling Tan 《International Journal of Science Education》2013,35(4):465-472

To alleviate teachers’ reluctance toward practical work, there has been much discussion on teachers’ pedagogical content knowledge, teaching materials, and failsafe strategies for practical work. Despite these efforts, practical work is still regarded as a challenging task for many elementary science teachers. To understand the complexity of teachers’ conflicts in practical work, this study examines teachers’ ideas about teaching and learning that influence teachers’ decision‐making and action on teaching practical work. More important than knowing technical–rational aspects of practical work is to understand the internal contradictions that teachers have to resolve within themselves regarding their capabilities and beliefs about science teaching and practical work. Using stories and experiences of 38 third‐year university students in a science method course in Korea, we seek to understand the conflicts and negotiations that they experience as they make decisions regarding practical work throughout their course. Reflective writings and group discussions on their lived experiences and concerns were used to probe participants’ ideas on teaching using practical work. From written and verbal data, themes were saturated in terms of the aspects which could (dis)encourage their practice. Results suggest that there are multifactorial challenges in pre‐service teachers’ understandings and concerns in practical work. Besides time, materials, and curriculum, pedagogical assumptions and values also compositely challenge the minds of teachers. As the pre‐service elementary teachers negotiated within themselves the importance of science in classroom and social levels, the question is raised about their identities as pre‐service elementary teachers to appreciate the balance between science teaching and practical work.  相似文献   

Defining the family: towards a critical framework for families of children with disabilities     

Barry Carpenter 《欧洲特需教育杂志》2013,28(2):180-188

ABSTRACT

Family‐centred approaches are widely recognized internationally as the most ecologically appropriate way of working with families of children with disabilities. Pivotal in this approach is its focus upon the needs of the whole family, rather than only the needs of the child (with a disability). It places a significant emphasis on flexible and responsive transdisciplinary service delivery and upon parent choice and decision‐making. For the family‐centred approach to become truly effective, then, we must define what constitutes a family. Or rather ask families how they define themselves. Alongside an exploration of traditional and non‐traditional family roles, this paper challenges stereotypical notions of the family, and seeks to establish the family as the core element in any service team.  相似文献