Understanding the relative contribution of technical and tactical performance to match outcome in Australian Football     

Christopher M Young  Wei Luo  Paul B Gastin  Daniel B Dwyer 《Journal of sports sciences》2020,38(6):676-681

ABSTRACT

The aim of this study was to assess if tactical and technical performance indicators (PIs) could be used in combination to model match outcomes in Australian Football (AF). A database of 101 technical PIs and 14 tactical PIs from every match in the 2009–2016 Australian Football League (AFL) seasons was merged. Two outcome measures Win-loss and Score margin were used as dependent variables. The top 45 ranked technical and tactical PIs from a feature selection process were used to model match outcome using decision tree and Generalised Linear Models (GLMs). Of the top 45 selected features, this included seven tactical PIs. The Win-loss-based Decision tree model achieved a classification accuracy of 89.0% and GLM 93.2%. A Score margin-based GLM achieved a root mean squared error (RMSE) of 6.9 points. A combined approach to the classification of match outcomes provided no improvement in model accuracy compared with previous literature. However, this study has established the relative importance of technical and tactical measures of performance in relation to successful team performance in AF.  相似文献   

基于粗集的支持向量机文本分类方法研究   总被引：1，自引：0，他引：1  

崔彩霞  王素格 《科技广场》2006,(8):4-6

本文提出了一种基于粗糙集的支持向量机文本分类方法。该方法利用粗糙集的约简理论降低了支持向量的维数,同时保证了分类性能。实验表明该方法能获得较好的分类效果。  相似文献   

国防科研项目评审模型研究及其DSS设计     

罗小明  赵春 《科研管理》1997,18(2):49-52,,48,

本文建立了国防科研项目评审的指标体系，并对项目管理中的评审模型进行了研究。据此，设计开发了国防科研项目实施计划管理的ＤＳＳ，给出ＤＳＳ的详细结构及其特点。  相似文献   

Researching Internet Communities: Proposed Ethical Guidelines for the Reporting of Results   总被引：4，自引：0，他引：4  

Storm A. King 《The Information Society》1996,12(2):119-128

Communication researchers and social scientists are quickly discovering the value of data that exists in the postings of members of Internet e-mail, Usenet, and real-time groups. The ability to communicate with one's peers, no matter how esoteric the interests, is causing an explosion in the number of new virtual communities. The interpersonal dynamics of these groups are increasingly coming under the scrutiny of academic research. The publicly available archived records of Internet virtual communities are being analyzed for a wide variety of research interests. The ability to do naturalistic observations of group dynamics, as they are exhibited in these exchanges of text, has captured the attention of many researchers. The institutional review boards of major universities are granting researchers exempt or expedited (exempt from full review) status for this work, due to the public nature of the notes being analyzed. These studies often involve the lack of informed consent, where the group members under study are unaware they are being monitored. There is a potential for psychological harm to the members of these groups, depending on the way results are reported. This article explores the ethical considerations that must be taken into account to protect cyberspace participants. The guidelines proposed are based on the American Psychological Association ethical guidelines for use of human subjects in research. An explanation is offered as to how such guidelines can best be applied to the study of Internet communities. The constructs of Group Accessibility (the public/private nature of the actual cyberspace occupied by a group) and Perceived Privacy (the level of privacy that group members assume they have) are defined and proposed as two dimensions by which individual Internet communities may be evaluated in order to assure the ethical reporting of research findings.  相似文献   

一种新式背负型支撑装置的结构设计     

唐际杰  林锋 《大众科技》2016,(3):41-43

随着武器装备的小型化,便携式装备应用越来越广,进而对便携式装备的体积、重量等指标方面的要求也越来越高。在单兵背负便携设备进行作战架设时,结构巧妙的支撑装置会给整个系统的背负、架设、撤收带来较好的实战效果。文章从支撑装置的选材、结构形式、功能等方面加以阐述,体现了该结构设计的新颖与实用性。  相似文献   

进一步提高自然科学基金资助项目的创新性之研究   总被引：5，自引：1，他引：5  

王平  王宇田 《科研管理》1996,17(3):25-30

中国国家自然科学基金委员会(NSFC)成立十年来,大力支持基础研究,强调了支持创新的政策,结出了丰硕的成果,证明科技体制改革迈出的这一步是十分正确的.但通过问卷调查,也发现目前无论是从体制、评审程序、资助政策、专家的遴选使用和管理上,都还存在一些不利于创新的因素.如何克服这些不利因素,文中提出了13点具体改进措施  相似文献   

三维表面微观形貌的等高图绘制及粗糙度3-D评定参数计算方法研究     

陈小岗  刘远伟  孙全平 《中国科技信息》2006,(20):281-284

针对零件表面质量的要求愈来愈高，而机加工表面微观形貌的粗糙度3-D评定方法却相对滞后。针对这一问题，本文就三维表面微观形貌的等高图的绘制方法、粗糙度3-D评定参数的计算提出了一些具体编程实现方法。重点阐述了三维表面等高图的绘制方法、3-D支承率和液体滞留性能指数的计算方法。利用JB-4C测量仪，开发了粗糙度3-D评定参数计算系统，验证了该方法的可行性。  相似文献   

The Early Literacy Support Programme (ELS) and the blend and clash of national educational policy ideologies in England     

Janet Soler Corresponding author  Alice Paige‐Smith 《Early Years: An International Journal of Research and Development》2005,25(1):43-54

In this article we consider the development of key policy issues in England, related to the area of literacy learning and children who are considered to have difficulties in literacy in their early years. We trace the tensions which have arisen since the 1980s between different policies and practices in these areas. These tensions include pressures to raise standards of literacy and to support children with difficulties, and the establishment of a prescribed curriculum for young children. In particular, we focus on the blend and clash of national educational policy ideals in areas related to literacy and children who have been categorised as having ‘special educational needs’, and how these have influenced the development of the Early Literacy Support Programme (ELS) (DfES, 2001 Department for Education and Skills 2001a Early Literacy Support Programme, materials to support teachers working in partnership with teaching assistants London DfES  [Google Scholar]a; 2001 Department for Education and Skills 2001b Early Literacy Support Programme, session materials for teaching assistants London DfES  [Google Scholar]b). This is a programme set up by the Department for Education and Science in England for children in Year 1, aged 5 to 6 years old.  相似文献   

高校贫困生心理问题的表现、成因与对策     

王孝琴 《四川职业技术学院学报》2007,17(1):68-70

随着高校扩招，贫困生数量大幅增加，许多贫困生承受着巨大的经济压力和心理压力，成了高校中各种心理问题的高发群体，需要我们予以高度关注．本文分析了贫困生心理问题的表现、成因，提出了解决对策。  相似文献   

Splicing-site recognition of rice (Oryza sativa L.)DNA sequences by support vector machines     

彭司华  樊龙江  彭小宁  庄树林  杜维  陈良标 《浙江大学学报(A卷英文版)》2003,4(5)

Motivation: It was found that high accuracy splicing-site recognition of rice (Oryza sativa L.) DNA sequence is especially difficult. We described a new method for the splicing-site recognition of rice DNA sequences. Method: Based on the intron in eukaryotic organisms conforming to the principle of GT-AG, we used support vector machines (SVM) to predict the splicing sites. By machine learning, we built a model and used it to test the effect of the test data set of true and pseudo splicing sites. Results: The prediction accuracy we obtained was 87.53% at the true 5' end splicing site and 87.37% at the true 3' end splicing sites. The results suggested that the SVM approach could achieve higher accuracy than the previous approaches.  相似文献