苏北高职院校体育教学改革实施中教师阻抗的现象学分析及消除策略     

姜龙  秦博  骆勇 《体育科技文献通报》2020,(4):26-27,31

本文将教师阻抗定义为由于自身或外界因素导致教师对现有体育教学改革表现出的不满、反对、甚至抵制心理和行为。研究以教师阻抗为问题切入点,重点探究教师阻抗的内在原因。具体分析内容包括:现有体育教学改革实施现状、体育教师态度真相、冷落改革,阻抗缘由,并结合阻抗缘由提供相关消解建议。本研究主要以现象学研究方法作为方法论基础,由悬置与还原、体验与描述、反思与归纳、本质的呈现作为重点环节,参照Pollio的现象学研究方法流程,采用深度访谈,访谈对象20人,每轮访谈结束后及时将访谈录音转录为文本形式,访谈文本132571字。对访谈文本采取归纳与演绎相结合的形式,精简提炼并进行具体论证分析。结论:(1)高职院校体育改革情况并不理想,阻抗现象真实存在;(2)体育教师内心支持改革,主观排斥现象罕见,阻抗现象另有他因;(3)体育教师阻抗主要由于教师对公共体育课程教学指导纲要无从下手,各校围绕体育教学改革中需要变更新的大纲、教学方法、评价方式等工作茫然无措所导致。以此建议多安排一线教师参加培训学习;制定更为客观、易操作的教学方法和评价方式应用于高职院校体育教学一线;增大资金及人力投入;提高教师文化自信等方面,消除改革中出现的部分教师阻抗,也为高职体育改革提出一些思路。  相似文献   

Music and sport: exploring the intersections     

Jonathan Long  Karl Spracklen 《Sport in Society》2021,24(1):1-7

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Revisiting the cluster-based paradigm for implicit search result diversification     

Hai-Tao Yu  Adam Jatowt  Roi Blanco  Hideo Joho  Joemon M. Jose  Long Chen  Fajie Yuan 《Information processing & management》2018,54(4):507-528

To cope with ambiguous and/or underspecified queries, search result diversification (SRD) is a key technique that has attracted a lot of attention. This paper focuses on implicit SRD, where the subtopics underlying a query are unknown. Many existing methods appeal to the greedy strategy for generating diversified results. A common practice is using a heuristic criterion for making the locally optimal choice at each round. As a result, it is difficult to know whether the failures are caused by the optimization criterion or the setting of parameters. Different from previous studies, we formulate implicit SRD as a process of selecting and ranking k exemplar documents through integer linear programming (ILP). The key idea is that: for a specific query, we expect to maximize the overall relevance of the k exemplar documents. Meanwhile, we wish to maximize the representativeness of the selected exemplar documents with respect to the non-selected documents. Intuitively, if the selected exemplar documents concisely represent the entire set of documents, the novelty and diversity will naturally arise. Moreover, we propose two approaches ILP4ID (Integer Linear Programming for Implicit SRD) and AP4ID (Affinity Propagation for Implicit SRD) for solving the proposed formulation of implicit SRD. In particular, ILP4ID appeals to the strategy of bound-and-branch and is able to obtain the optimal solution. AP4ID being an approximate method transforms the target problem as a maximum-a-posteriori inference problem, and the message passing algorithm is adopted to find the solution. Furthermore, we investigate the differences and connections between the proposed models and prior models by casting them as different variants of the cluster-based paradigm for implicit SRD. To validate the effectiveness and efficiency of the proposed approaches, we conduct a series of experiments on four benchmark TREC diversity collections. The experimental results demonstrate that: (1) The proposed methods, especially ILP4ID, can achieve substantially improved performance over the state-of-the-art unsupervised methods for implicit SRD. (2) The initial runs, the number of input documents, query types, the ways of computing document similarity, the pre-defined cluster number and the optimization algorithm significantly affect the performance of diversification models. Careful examinations of these factors are highly recommended in the development of implicit SRD methods. Based on the in-depth study of different types of methods for implicit SRD, we provide additional insight into the cluster-based paradigm for implicit SRD. In particular, how the methods relying on greedy strategies impact the performance of implicit SRD, and how a particular diversification model should be fine-tuned.  相似文献   

Football,ethnicity and community: the life of an African Caribbean football club     

Jonathan Long 《Soccer & Society》2019,20(1):189-191

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PCSI:一种单篇论文被引频次标准化方法     

伍军红  肖宏  任美亚  冯士雍  丁哲 《图书情报工作》2020,64(23):22-30

[目的/意义] 文章的被引频次一直是量化评价一篇论文学术影响力的重要指标。但在不同学科不同年份发表的论文会因该领域研究论文数、引用滞后等因素呈现较大的差异。因此在对比两篇论文时，难以简单依据被引频次的绝对值来评判论文影响力大小。为此，本文设计了一个新的可计算数学模型，使得每篇论文可以有一个标准化的指标，以便对不同学科不同年份发表的论文的学术影响力进行直接比较。[方法/过程] 通过分析2006、2017两年中国科技类学术期刊各学科论文的被引频次分布规律，采用同学科论文被引频次的分布形态最接近对数正态分布的先设条件，提出一种被引频次标准化指数——Paper Citation Standardized Index （简称PCSI，中文"论文引证标准化指数"）。最后以中国科协优秀科技期刊论文评选结果为例，将它们与论文所属学科全部论文进行实证对比研究。[结果/结论] 结果证明，PCSI对不同年份、不同学科论文的被引频次进行了标准化，反映了被引频次的线性差距，是一种较为理想的单篇论文学术影响力比较评价工具。  相似文献   

基于ICWGT和灰色关联分析法的起重机安全评价     

肖汉斌  熊楚宸  祝锋  刘敏 《上海海事大学学报》2020,41(2):117-122

针对目前起重机安全评价过于依赖主观权重且忽视起重机安全状态变化趋势的问题，建立基于改进博弈论组合赋权法（improved combination weighting method of game theory，ICWGT）和灰色关联分析法的起重机安全评价体系。在该评价体系中，收集样本数据以确定评价值，构建评价等级空间来计算起重机行为特征序列与标准行为特征序列的关联系数。运用ICWGT在层次分析法和信息熵 未确知测度理论确定的主、客观权重中寻找平衡。充分考虑专家经验和样本数据，确定优化权重以改善关联系数的分配问题，从而获取起重机灰色关联度评价值和安全等级，旨在对起重机安全状态变化趋势进行更加准确的定量描述和定性分析。实例分析验证了该评价体系的有效性。  相似文献   

传播的游戏理论视角下 新浪微博俄罗斯世界杯传播效果分析          下载免费PDF全文

陈肖鹏 《河北体育学院学报》2019,33(3):33-38

使用“传播的游戏理论”，对新浪微博俄罗斯世界杯传播效果进行分析，并对新媒体用户的需求进行探讨。研究认为，世界杯传播是一场盈余时代的足球“游戏”，满足用户对愉悦、趣味的需求和对游戏的需求是新媒体未来发展的一种趋势；新浪微博俄罗斯世界杯期间，体现主观、个性的“选择性会聚”让用户在“游戏”过程中促进了“自我”的发展；只为享受足球魅力的非功利性传播为用户提供了一个宽松的“游戏”环境；利用微博话题、短视频、直播等新媒体技术传播乐趣，用户从“游戏”中收获了愉悦。对于传播效果的研究立足受众的个性特征和主观心态，注重体现个体主观能动意识，对把握未来新媒体传播发展和趋势具有启示意义。  相似文献   

基于本体的引文知识服务原型系统设计与实现     

王珊珊  陈晨  肖明 《图书情报工作》2019,63(2):132-143

[目的/意义]当前，国内引文数据库建设已经初具规模，但现有的引文知识服务系统不能很好地揭示引文之间的结构或关系，给引文的获取、共享和利用带来一定困难。[方法/过程]以引文数据作为研究对象，对所涉及的各种知识进行获取和整理，探讨引文之间的语义关系，构建科研人员本体和引文知识本体两个本体，设计并初步实现引文知识服务原型系统。[结果/结论]对基于本体的引文知识服务原型系统构建进行验证，实验结果表明，基于本体的引文知识服务原型系统基本实现预定的目标与功能。  相似文献   

Identifying Liars Through Automatic Decoding of Children's Facial Expressions     

Kaila C. Bruer  Sarah Zanette  Xiao Pan Ding  Thomas D. Lyon  Kang Lee 《Child development》2020,91(4):e995-e1011

This study explored whether children's (N = 158; 4- to 9 years old) nonverbal facial expressions can be used to identify when children are being deceptive. Using a computer vision program to automatically decode children's facial expressions according to the Facial Action Coding System, this study employed machine learning to determine whether facial expressions can be used to discriminate between children who concealed breaking a toy(liars) and those who did not break a toy(nonliars). Results found that, regardless of age or history of maltreatment, children's facial expressions could accurately (73%) be distinguished between liars and nonliars. Two emotions, surprise and fear, were more strongly expressed by liars than nonliars. These findings provide evidence to support the use of automatically coded facial expressions to detect children's deception.  相似文献   

唐西州时期吐鲁番的桃树栽培——从出土文书及实物证据谈起     

赵美莹  王龙  党志豪  蒋洪恩 《中国科学院大学学报》2020,37(3):405-415

桃是中国重要的水果之一，经丝绸之路西传至古波斯。作为丝路重镇的吐鲁番地区，晋唐时期的桃树栽培是否存在却始终未能确定。《吐鲁番出土文书》中曾出现"桃"字，学界对其释读说法不一，主要分为"无桃说"和"有桃说"两种观点。本文从历史记载和实物证据两方面入手，结合《吐鲁番出土文书》及吐鲁番木尔吐克萨依戍堡出土的桃核遗存，通过文献梳理、年代测定和植物学鉴定等研究，认为至迟在唐西州时期，吐鲁番地区已经存在桃树栽培。  相似文献