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   11510篇
  免费   116篇
  国内免费   18篇
教育   8263篇
科学研究   1134篇
各国文化   187篇
体育   746篇
综合类   16篇
文化理论   138篇
信息传播   1160篇
  2021年   110篇
  2020年   135篇
  2019年   256篇
  2018年   373篇
  2017年   361篇
  2016年   357篇
  2015年   246篇
  2014年   309篇
  2013年   2525篇
  2012年   284篇
  2011年   253篇
  2010年   238篇
  2009年   208篇
  2008年   260篇
  2007年   251篇
  2006年   231篇
  2005年   227篇
  2004年   206篇
  2003年   178篇
  2002年   170篇
  2001年   150篇
  2000年   150篇
  1999年   158篇
  1998年   139篇
  1997年   131篇
  1996年   137篇
  1995年   162篇
  1994年   138篇
  1993年   125篇
  1992年   142篇
  1991年   131篇
  1990年   131篇
  1989年   138篇
  1988年   126篇
  1987年   112篇
  1986年   117篇
  1985年   127篇
  1984年   135篇
  1983年   118篇
  1982年   139篇
  1981年   97篇
  1980年   81篇
  1979年   95篇
  1978年   93篇
  1977年   105篇
  1976年   86篇
  1975年   64篇
  1974年   70篇
  1973年   72篇
  1971年   53篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
121.
The main aspects of the creation of a monitoring system for the research activities of the members of a higher-education institution are considered. The scientific activities of the lecturers and members of Turgenev Orel State University is used as the basis. It is expected that this system will be an efficient tool for optimal managerial decisions at all levels.  相似文献   
122.
The British Journal of Educational Technology (BJET) uses a novel system for obtaining referees by e‐mailing the abstracts of submissions to a panel of over 250 referees and allowing these individuals to choose which papers they would like to review. An analysis of 13 experienced referees showed that, of 473 reviews assessed, these referees were slightly more lenient than the editor and that electronic records provide useful data that can be mined in interesting ways.  相似文献   
123.
随着高校办公自动化程度的不断提高,科学合理地实现文书档案在线归档成为高校档案信息化建设的一个重要课题。文章以中国矿业大学档案馆为例,详细介绍了文书档案在线归档的软件环境及归档模式,以及该模式实践过程中遇到的重点问题及解决办法,为高校文书档案在线归档工作的推进提供了参考实例。  相似文献   
124.
125.
This study is designed to identify the underlying satisfaction dimensions gained through engagement in target shooting as a serious leisure pastime. The instrument design was based on the Leisure Satisfaction Scale. A total of 5502 useable surveys were collected through the Internet and a website related to target shooting and gun ownership. The results revealed eight dimensions: self-actualization, social interaction, location aesthetic, respite, physical benefit, connection and hedonic pleasure, which supplied the primary satisfiers of engaging in target shooting as a serious leisure activity. The demographic profile and dimensions of satisfaction may serve to dispel commonly held stereotypes of shooting hobbyists and those involved in gun ownership. The findings have important implications for leisure researchers and practitioners, to industry, both leisure and firearm related, and the target shooting community at large. This study adds to the literature of both target shooting and serious leisure.  相似文献   
126.
This study describes foot positioning during the final two steps of the approach to the ball amongst professional rugby goal-kickers. A 3D optical motion capture system was used to test 15 goal-kickers performing 10 goal-kicks. The distance and direction of each step, as well as individual foot contact positions relative to the tee, were measured. The intra- and inter-subject variability was calculated as well as the correlation (Pearson) between the measurements and participant anthropometrics. Inter-subject variability for the final foot position was lowest (placed 0.03 ± 0.07 m behind and 0.33 ± 0.03 m lateral to the tee) and highest for the penultimate step distance (0.666 ± 0.149 m), performed at an angle of 36.1 ± 8.5° external to the final step. The final step length was 1.523 ± 0.124 m, executed at an external angle of 35.5 ± 7.4° to the target line. The intra-subject variability was very low; distances and angles for the 10 kicks varied per participant by 1.6–3.1 cm and 0.7–1.6°, respectively. The results show that even though the participants had variability in their run-up to the tee, final foot position next to the tee was very similar and consistent. Furthermore, the inter- and intra-subject variability could not be attributed to differences in anthropometry. These findings may be useful as normative reference data for coaching, although further work is required to understand the role of other factors such as approach speed and body alignment.  相似文献   
127.
128.
ABSTRACT

This study aimed to translate movement patterns, technical skills and tactical actions associated with high-intensity efforts into metrics that could potentially be used to construct position-specific conditioning drills. A total of 20 individual English Premier League players’ high-intensity running profiles were observed multiple times (= 100) using a computerised tracking system. Data were analysed using a novel high-intensity movement programme across five positions (centre back [CB], full-back [FB], central midfielder [CM], wide midfielder [WM] and centre forward [CF]). High-intensity efforts in contact with the ball and the average speed of efforts were greater in WMs than CBs, CMs and CFs (effect sizes [ES]: 0.9–2.1, < 0.05). WMs produced more repeated efforts than CBs and CMs (ES: 0.6–1.3, < 0.05). In possession, WMs executed more tricks post effort than CBs and CMs (ES: 1.2–1.3, < 0.01). FBs and WMs performed more crosses post effort than other positions (ES: 1.1–2.0, < 0.01). Out of possession, CFs completed more efforts closing down the opposition (ES: 1.4–5.0, < 0.01) but less tracking opposition runners than other positions (ES: 1.5–1.8, < 0.01). CFs performed more arc runs before efforts compared to CBs, FBs and WMs (ES: 0.9–1.4, < 0.05), however, CBs completed more 0–90° turns compared to FBs, CMs and WMs (ES: 0.9–1.1, < 0.01). The data demonstrate unique high-intensity trends in and out of possession that could assist practitioners when devising position-specific drills.  相似文献   
129.
Cased explosives generate highly energetic fragments as their casing breaks up. Due to the complexity of casing fragment related behavior such as embedment, perforation and ricochet, it may be insufficient to use equivalent triangular pressure loading in fragment impact simulations. This simplified method may over- or under-predict the target response. Recently, a procedure using contact techniques has been proposed to overcome such difficulties. It has been shown that the new method has the inherent capability in modeling the multi-piece and multi-hit fragment impact problems in a more realistic way. To investigate the applicability of the proposed method to simulations involving multi-layer penetration, the selected problems of fragment impact on multi-layer targets are described in this paper. It is demonstrated that this method is capable of predicting the complicated multi-layer structural response caused by fragment impact and penetration. Modeling procedures and some technical issues are also discussed.  相似文献   
130.
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