基于知识图谱的我国公共体育服务研究可视化分析     

易军 《吉林体育学院学报》2020,(1):21-29

以中国知网所收录的2007年至2017间核心期刊中有关公共体育服务文献题录作为分析数据样本,对所搜集到的254篇文献进行可视化分析。借助CiteSpace V软件,运用文献计量学方法与内容分析方法,结果表明:近十年我国公共体育服务研究经历了波浪式增长与急速增长两个阶段,研究主题紧密结合国家政策战略,在不断调整中推动了公共体育服务的发展。主要特征体现在始终服务于国家宏观政策方针,顺应了政府职能转变下对体育发展改革的时代需求;以“体育管理、公共服务”为核心的研究主题始终贯穿,主动融入政策响应的研究诉求强烈,人民美好生活中体育需求的关照不足;整个研究过程充满了动态性与局限性。未来研究应坚持与国家公共服务政策相伴相生,形成开放性反馈研究系统;注重公共体育服务研究的政策引领和政策的事后绩效评估;打造学术共同体,提升公共体育服务研究成果在政策咨询和智库建设中的作用。  相似文献   

汽车变速器CAE仿真与试验分析     

赖俊  梅自元 《清远职业技术学院学报》2020,(1):51-54

变速器作为汽车动力总成系统的关键部件,其功能的可靠、耐久的长短等性能直接影响到汽车的整体功能。CAE仿真与试验是变速箱性能验证的重要手段,通过结合设计阶段的CAE仿真与样件阶段的试验验证进行对比研究,能够使变速器在量产前完善设计,减少试验的样本量,从而实现缩短变速器设计周期和降低成本的目的。  相似文献   

高职院校学生工作人性化管理探析     

张旭辰  杨岭  张军 《北京工业职业技术学院学报》2018,17(1):80-82

人性化管理模式已经成为当前社会一种重要管理模式,逐渐取代制度化管理,被广泛运用于企业的行政管理之中。在这个大背景下,高校的管理模式也深受其影响,高职院校人性化学生管理工作模式也在逐步取代学生管理工作的制度化模式。为使高职院校学生工作管理模式由传统的制度化模式向人性化管理成功转型,参考相关文献并结合实际工作积累的经验,提出人性化管理理念和人性化管理转型的途径,如树立以人为本观念及加强网络教育作用等。  相似文献   

Application of network meta-analysis in the field of physical activity and health promotion     

Xiwen Su  Daniel J. McDonough  Haitao Chu  Minghui Quan  Zan Gao 《运动与健康科学(英文)》2020,9(6):511-520

Continued advancement in the field of physical activity and health promotion relies heavily on the synthesis of rigorous scientific evidence. As such, systematic reviews and meta-analyses of randomized controlled trials have led to a better understanding of which intervention strategies are superior (i.e., produce the greatest effects) in physical activity-based health behavior change interventions. Indeed, standard meta-analytic approaches have allowed researchers in the field to synthesize relevant experimental evidence using pairwise procedures that produce reliable estimates of the homogeneity, magnitude, and potential biases in the observed effects. However, pairwise meta-analytic procedures are only capable to discerning differences in effects between a select intervention strategy and a select comparison or control condition. In order to maximize the impact of physical activity interventions on health-related outcomes, it is necessary to establish evidence concerning the comparative efficacy of all relevant physical activity intervention strategies. The development of network meta-analysis (NMA)—most commonly used in medical-based clinical trials—has allowed for the quantification of indirect comparisons, even in the absence of direct, head-to-head trials. Thus, it stands to reason that NMA can be applied in physical activity and health promotion research to identify the best intervention strategies. Given that this analysis technique is novel and largely unexplored in the field of physical activity and health promotion, care must be taken in its application to ensure reliable estimates and discernment of the effect sizes among interventions. Therefore, the purpose of this review is to comment on the potential application and importance of NMA in the field of physical activity and health promotion, describe how to properly and effectively apply this technique, and suggest important considerations for its appropriate application in this field. In this paper, overviews of the foundations of NMA and commonly used approaches for conducting NMA are provided, followed by assumptions related to NMA, opportunities and challenges in NMA, and a step-by-step example of developing and conducting an NMA.  相似文献   

Super-twisting observer-based sliding mode control with fuzzy variable gains and its applications to fully-actuated hexarotors     

Ngo Phong Nguyen  Wonhee Kim  Jun Moon 《Journal of The Franklin Institute》2019,356(8):4270-4303

In this paper, we consider the super-twisting observer-based sliding mode control algorithm with fuzzy variable gains (STOSMC) for the fully-actuated hexarotor. Our hexarotor has full actuation due to six titled propellers that allows to control position and orientation (attitude) simultaneously, and resolves the singularity problem of the rotational matrix by using the quaternion modeling framework. We show that the proposed STOSMC for the hexarotor guarantees finite-time convergence of the estimation error and asymptotic stability of the hexarotor. In simulations, we demonstrate the nonsingularity and fully-actuated control performance of the hexarotor by considering extreme position and attitude control scenarios. Moreover, the simulation results show that the hexarotor achieves the fast and precise tracking performance to the desired position and the desired attitude and the chattering phenomenon is reduced compared with the fixed-gains observer-based super-twisting sliding mode control due to the fuzzy mechanism.  相似文献   

高校体育场馆对外开放突发事件的应急管理机制研究     

王骏  刘海荣  何宁宁  廖大伟 《沈阳体育学院学报》2020,(2):125-132

运用文献资料、实地调查等研究方法,对我国高校体育场馆对外开放突发事件应急管理现状进行调查分析。发现目前我国高校体育场馆对外开放过程中,存在缺乏突发事件应急预案的研制、对安全风险评估不足、缺乏急救设施的配置、场馆现场管理人员缺乏应急管理的培训与演练、场馆现场管理人员数量不足的问题。在高校体育场馆突发事件应急管理发展现状基础上,依托应急管理理论与应急救援理论,架构由突发事件识别与评估模块、决策系统模块、应急救助体系模块、应急预案选择模块、应急救援的执行模块所组成的我国高校体育场馆对外开放突发事件应急管理机制。建议:完善场馆管理规章制度,形成场馆对外开放突发事件应急长效管理机制;加强员工的应急管理理论培训与技能学习;制定各类应急预案并进行演练;保持突发事件应急救援稳定的对外联系畅通。  相似文献   

Linear output-feedback-based semi-global stabilization for switched nonlinear time-delay systems     

Zhenhua Li  Lijun Long  Jun Zhao 《Journal of The Franklin Institute》2019,356(13):7224-7245

This paper focuses on the problem of semi-global output-feedback stabilization for a class of switched nonlinear time-delay systems in strict-feedback form. A switched state observer is first constructed, then switched linear output-feedback controllers for individual subsystems are designed. By skillfully constructing multiple Lyapunov–Krasovskii functionals and successfully solving several troublesome obstacles, such as time-varying delay and switching signals and nonlinearity in the design procedure, the switched linear output-feedback controllers designed can render the resulting closed-loop switched system semi-globally stabilizable under a class of switching signals with average dwell time. Furthermore, under some milder conditions on nonlinearities, the semi-global output-feedback stabilization problem for switched nonlinear time-delay systems is also studied. Simulation studies on two examples, which include a continuous stirred tank reactor, are carried out to demonstrate the effectiveness of the proposed approach.  相似文献   

国内外区域创新研究方法综述          下载免费PDF全文

苏屹  刘艳雪 《科研管理》2019,40(9):14-24

区域创新作为地区经济发展的重要驱动力，引起了国内外学者的广泛关注，学者们采用纷杂的研究方法对区域创新问题进行研究。通过对近十年文献的查阅，梳理出国内外研究区域创新问题的三类比较典型方法：统计分析方法、前沿面分析方法、系统分析方法，并对三类研究方法进行比较分析。在此基础上，针对区域创新面对的新挑战，从大数据分析技术和人工智能两个方面，提出了未来区域创新应该重点关注的研究方法。  相似文献   

土司体育文化在永顺县中小学推广现状的调查与分析——以土家族摆手舞为例     

向依依  郑军 《体育科技文献通报》2020,(2):24-26

为促进土司体育文化更好的开展,扩展土家摆手舞的开展范围和提高摆手舞的质量,促进土司体育的发展,提高学生身体素质和文化修养。本文采用文献资料法、问卷调查法、座谈访问法、逻辑分析法,对永顺县中小学土家摆手舞开展的现状进行调查与分析。结果认为,永顺县中小学摆手舞存在学生学习兴趣不高、对摆手舞认知不足的现象,学校也因为资金受限,体育教学场地存在教学用面积不足及地面不平整状况,多数老师靠自学和其他老师所教学习的摆手舞,体育教师认为师资分配不合理现象存在,并且多数学生认为体育教师教学动作不够规范,直接影响了摆手舞在中小学的发展。  相似文献   

AJ Can-do标准下的日语口语能力培养实践研究     

李军 《吉林省教育学院学报》2021,37(3):67-71

本文以中国赴日本国留学生预备学校在"学术日语"教育标准下的教学方法改革为研究对象,通过考察这一教学标准在口语实践课程中的运用,分析教学设计,观察教学效果,论证了适应该校实际情况的教学模式,进而总结出了在短期强化日语教学中提高学生口语表达能力的新途径,以期为该校今后的教学改革提供借鉴.  相似文献