首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   62048篇
  免费   1328篇
  国内免费   1449篇
教育   38260篇
科学研究   7792篇
各国文化   28篇
体育   8780篇
综合类   6044篇
文化理论   18篇
信息传播   3903篇
  2024年   12篇
  2023年   96篇
  2022年   446篇
  2021年   830篇
  2020年   1035篇
  2019年   899篇
  2018年   860篇
  2017年   765篇
  2016年   922篇
  2015年   1569篇
  2014年   3660篇
  2013年   3545篇
  2012年   5107篇
  2011年   5465篇
  2010年   3843篇
  2009年   3549篇
  2008年   4296篇
  2007年   4985篇
  2006年   4905篇
  2005年   4120篇
  2004年   3723篇
  2003年   3023篇
  2002年   2325篇
  2001年   1799篇
  2000年   1095篇
  1999年   542篇
  1998年   329篇
  1997年   269篇
  1996年   192篇
  1995年   125篇
  1994年   161篇
  1993年   85篇
  1992年   82篇
  1991年   50篇
  1990年   42篇
  1989年   10篇
  1988年   11篇
  1987年   7篇
  1985年   7篇
  1984年   4篇
  1983年   3篇
  1982年   7篇
  1981年   6篇
  1980年   2篇
  1979年   1篇
  1978年   5篇
  1977年   6篇
  1976年   1篇
  1957年   4篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
11.
ABSTRACT

Contemporary museums must balance their roles as commercial entities and repositories of various, and often dissonant, heritages and histories. Sports museums in particular often have clear commercial and nostalgic aims, particularly through tourist visitation, though the extent to which they represent more challenging narratives remains unclear. This paper examines how one of the most famous sports museums in the world, the National Baseball Hall of Fame (NBHF) in Cooperstown, New York, balances its dual role as tourist attraction and repository of baseball's sometimes checkered past. It was found that different sections of the museum provide greater or lesser degrees of engagement with more controversial issues, although the commercial outputs and appeal of the museum remains clear throughout. Utlimately, the NBHF demonstrates that balancing veneration and critique in collections can be commercially prosperous, and can provide a template for other sport and popular culture museums who may be wary of incorporating more challenging narratives in their exhibits. Furthermore, the symbiotic relationship between the Hall of Fame and the village of Cooperstown, particularly in creating and maintaining cultural and economic outputs, requires further exploration.  相似文献   
12.
This investigation assessed the effect of dietary nitrate (NO3?) supplementation, in the form of beetroot juice (BR), on repeat-sprint performance in normoxia and normobaric hypoxia. 12 male team-sport athletes (age 22.3 ± 2.6 y, VO2peak 53.1 ± 8.7 mL.kg?1.min?1) completed three exercise trials involving a 10 min submaximal warm-up and 4 sets of cycling repeat-sprint efforts (RSE; 9 × 4 s) at sea level (CON), or at 3000 m simulated altitude following acute supplementation (140 mL) with BR (HYPBR; 13 mmol NO3?) or NO3depleted BR placebo (HYPPLA). Peak (PPO) and mean (MPO) power output, plus work decrement were recorded during the RSE task, while oxygen consumption (VO2) was measured during the warm-up. There were no significant differences observed between HYPBR and HYPPLA for PPO or MPO; however, work decrement was reduced in the first RSE set in HYPBR compared with HYPPLA. There was a moderate effect for VO2 to be lower following BR at the end of the 10 min warm-up (ES = 0.50 ± 0.51). Dietary NO3? may not improve repeat-sprint performance in hypoxia but may reduce VO2 during submaximal exercise. Therefore, BR supplementation may be more effective for performance improvement during predominantly aerobic exercise.  相似文献   
13.
Research on the adoption of systems for big data analytics has drawn enormous attention in Information Systems research. This study extends big data analytics adoption research by examining the effects of system characteristics on the attitude of managers towards the usage of big data analytics systems. A research model has been proposed in this study based on an extensive review of literature pertaining to the Technology Acceptance Model, with further validation by a survey of 150 big data analytics users. Results of this survey confirm that characteristics of the big data analytics system have significant direct and indirect effects on belief in the benefits of big data analytics systems and perceived usefulness, attitude and adoption. Moreover, there are mediation effects that exist among the system characteristics, benefits of big data analytics systems, perceived usefulness and the attitude towards using big data analytics system. This study expands the existing body of knowledge on the adoption of big data analytics systems, and benefits big data analytics providers and vendors while helping in the formulation of their business models.  相似文献   
14.
Recommender Systems are currently highly relevant for helping users deal with the information overload they suffer from the large volume of data on the web, and automatically suggest the most appropriate items that meet users needs. However, in cases in which a user is new to Recommender System, the system cannot recommend items that are relevant to her/him because of lack of previous information about the user and/or the user-item rating history that helps to determine the users preferences. This problem is known as cold-start, which remains open because it does not have a final solution. Social networks have been employed as a good source of information to determine users preferences to mitigate the cold-start problem. This paper presents the results of a Systematic Literature Review on Collaborative Filtering-based Recommender System that uses social network data to mitigate the cold-start problem. This Systematic Literature Review compiled the papers published between 2011–2017, to select the most recent studies in the area. Each selected paper was evaluated and classified according to the depth which social networks used to mitigate the cold-start problem. The final results show that there are several publications that use the information of the social networks within the Recommender System; however, few research papers currently use this data to mitigate the cold-start problem.  相似文献   
15.
ABSTRACT

Adaptive regulation of emotions is imperative for successful sport performance. However, the lion’s share of mainstream emotion regulation (ER) literature is founded on perspectives prioritising mental health, not performance. Consequently, ER strategies are predominantly classified as adaptive or maladaptive based on effectiveness in achieving targeted mental health outcomes. These conventional mental health classifications can catalyse misapplication of ER strategies within sport and other motor performance contexts when (1) ER motives are instrumentally directed towards performance enhancement and (2) Minimal consideration is given to the consequences of ER on the coordination and execution of motor actions. Herein, we review the current state of relevant ER research within and outside of sport contexts. We also present a novel conceptual framework, the Temporal Influence Model of Emotion Regulation (TIMER). TIMER proposes that ER strategies exert distinct, temporally dependent demands upon perceptual-cognitive and motoric resources. These unique regulatory profiles influence subsequent motor performance outcomes. Critically, the degree to which regulatory strategies are appropriate or ideal varies given environmental constraints along with performers’ affective and performance goals. The model includes testable hypotheses to guide theoretical and applied research in the domain of ER within sport and other motor performance contexts.  相似文献   
16.
BackgroundAthletes tend to have better visuo-motor performance than do sedentary individuals. However, several basic visual-function and perceptual parameters remain unexplored to date. In this study, we investigated whether differences exist in visual function, performance, and processing between basketball players and individuals without a sport-involvement background.MethodsA total of 33 healthy men with no visual impairment or pathology were divided into 2 groups, depending on the involvement in sport (semi-professional basketball players and sedentary individuals). We tested their baseline heart-rate variability in the resting position apart from subjective questionnaires to determine their physical fitness level, and we checked their visual function, performance, and processing through an extended battery of optometric tests.ResultsThe 2 groups differed in resting heart-rate variability parameters (p < 0.001), confirming their dissimilarities in regular time practising sports per week. The basketball players showed a closer breakpoint and recovery nearpoint of convergence, a higher fusional-vergence rate, better discriminability halos, and better eye–hand coordination (all p values < 0.05).ConclusionThese results show evidence that athletes, basketball players in this case, exhibit better performance in several visual abilities in comparison to a group of individuals without sporting backgrounds, suggesting an improvement due to the systematic involvement of those skills during basketball practice.  相似文献   
17.
ABSTRACT

We present the determinants of the length of stay (LOS) of Porto Street Stage that integrated the program of the 52nd edition of Rally de Portugal. Sport events assume an important role in the marketing of tourism destinations. However, when we compare them with other segments in tourism, it still remains underexplored. This study represents an opportunity to contribute to the literature, and it could become a significant toll for the organizers, public entities and other stakeholders. We contemplate a set of information and data that may improve the management of the future editions in a more rigorous and effective way. As we are dealing with an international event, it is an occasion to enlist tourists and promote the tourist destination. We applied a quantitative analysis and considered the sociodemographic characteristics of the spectators, factors that influenced the trip, expenses per day in the city, level of satisfaction with the event, and the intention to return. An OLS regression model, a Weibull survival model and a zero-truncated negative binomial regression model were estimated, and the results were compared. On the LOS determinants it is not common to consider the influence of each item of expenditure during the stay and the satisfaction levels with the event and different effects were observed. The travel and accommodation expenditures present a negative effect on the LOS. In the opposite side the satisfaction level and intention to return, both present a positive effect on the LOS. The sociodemographic characteristics have diverse impacts on the LOS.  相似文献   
18.
运用文献资料法、调查法、访谈法和统计法等,对体育专业大学生课堂学习体验进行调查分析。结果显示,较非体育生,体育生专业认同感较强,学校认同感较高,学习目标设置比例较高而计划实施水平不高,体育生与非体育生均以外生学习动机为主,学习投入水平不高且学习问题较多;对于当前的教学形式与方法、教学内容、教师、作业、成绩评价和奖学金评定也都有新的要求。提出,课堂教学需在内容、方法、形式上进行改革,增强教学的互动性,教学内容尽量满足学生求知需求,教师要多关心关注学生,布置作业要兼顾难度和趣味性,注重教师魅力塑造,建立形成性学习评价为主的成绩评价体系及多元化的奖学金评定体系,为推动大学体育专业教学改革提供参考。  相似文献   
19.
运用文献资料法和逻辑分析法,对冬季项目跨界跨项选材问题进行辩证分析。认为,2022年北京冬奥会、政府专项政策导向及国内外成功的跨界经验,为我国开展冬季项目跨界跨项选材工作提供了重要的机遇和支持,但跨界跨项选材任务艰巨、冬季项目人才缺口大、运动员培养时间不足、跨界跨项风险大等问题也不容忽视。为进一步做好跨界跨项选材工作,为我国冬季项目持续发展提供充足的人力支持,应积极落实国家政策,做到科学跨选;依托同项群项目选材,跨用传统优势项目人才;抓住冬奥发展机遇,尽快建立完善的人才培养体系。  相似文献   
20.
自治、法治、德治“三治合一”的乡村治理体系,为探索民间武术组织服务于乡村治理提供了新思路。在传统社会,民间武术组织以武德传承强化乡村德治机制,以门规戒约规范乡村法治秩序,以家长制参与乡村自治实践。而进入现代社会,民间武术组织服务于乡村治理面临着传统德治弱化、法治建设不完善、参与自治机制不健全三方面的困境。提出,民间武术组织要建立新的道德体系,营造乡村治理的德治氛围;加强组织治理,强化乡村治理的法治理念;深化自治实践,主动承担乡村治理职责功能,旨在为更好促进民间武术组织有效治理、推动乡村发展提供参考。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号