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   7266篇
  免费   121篇
  国内免费   170篇
教育   2794篇
科学研究   480篇
各国文化   35篇
体育   2708篇
综合类   902篇
文化理论   4篇
信息传播   634篇
  2024年   1篇
  2023年   19篇
  2022年   63篇
  2021年   166篇
  2020年   270篇
  2019年   144篇
  2018年   154篇
  2017年   144篇
  2016年   136篇
  2015年   208篇
  2014年   368篇
  2013年   706篇
  2012年   527篇
  2011年   529篇
  2010年   398篇
  2009年   349篇
  2008年   474篇
  2007年   499篇
  2006年   429篇
  2005年   374篇
  2004年   322篇
  2003年   310篇
  2002年   248篇
  2001年   185篇
  2000年   148篇
  1999年   101篇
  1998年   116篇
  1997年   68篇
  1996年   42篇
  1995年   15篇
  1994年   19篇
  1993年   6篇
  1992年   5篇
  1991年   2篇
  1990年   1篇
  1989年   2篇
  1985年   4篇
  1983年   2篇
  1982年   2篇
  1977年   1篇
排序方式: 共有7557条查询结果,搜索用时 250 毫秒
101.
介绍了国内外数字参考咨询服务质量评价体系的研究与应用概况。结合国家科学数字图书馆网络联合数字参考咨询服务的质量控制需要,在项目一期建设基础上选取部分指标建立了实际操作的评价体系,并制定了制度化的系统评价方案。  相似文献   
102.
1958年颁布的《国防教育法》对认识二战后美国的教育变革有重要意义。但长期以来研究者都视其为对"苏联卫星事件"的回应,是冷战时期国防政策的重要内容。笔者通过对文献的重新发掘与分析,指出两者之间不存在必然联系,这场教育改革不是"刺激-反应"模式的产物;此外,该法案立法过程中的焦点问题是对联邦政府干预教育权限的再讨论;法案通过后,在宣誓政治忠诚和学术自由问题上也受到广泛批评。国家安全不能概括法案的全部,至于联邦政府如何干预教育,以法案为代表的每一次讨论本身就是答案。  相似文献   
103.
Social networking sites are considered a valuable resource to maintain existing friendships even over considerable distances. The present study emphasizes tie strength as a crucial determinant for the use of interactive and passive features among 302 active Facebook users and friends of different relational closeness (close friends vs. casual friends vs. acquaintances) as well as a moderator for the impact of physical distance. As expected, tie strength affected direct interaction linearly, whereas social surveillance followed a quadratic trend. Furthermore, moderation analyses revealed less frequent direct interaction between close friends and stronger surveillance of casual friends’ profiles as physical distance increases. These results indicate different functions in relationship maintenance for both behaviors as direct interaction aims at nurturing current relationships, while surveillance serves as a catalyst for promising future communications. As a consequence, physical distance influences direct interaction adversely due to emerging constraints but also contains informational value encouraging information-seeking behaviors.  相似文献   
104.
The National Institutes of Health (NIH) library instruction program provides training services to staff, clinicians, and researchers across NIH and several Department of Health and Human Services (HHS) operating divisions. The audience, training needs, and training topics are diverse and constantly changing. The NIH library has developed several new services and class topics to meet the needs of its NIH and HHS communities. Context, strategies, and future directions for the NIH library instruction program are described.  相似文献   
105.
This article is the fourth in a series on New Directions. The National Health Service is under pressure, challenged to meet the needs of an ageing population, whilst striving to improve standards and ensure decision making is underpinned by evidence. Health Education England is steering a new course for NHS library and knowledge services in England to ensure access to knowledge and evidence for all decision makers. Knowledge for Healthcare calls for service transformation, role redesign, greater coordination and collaboration. To meet user expectations, health libraries must achieve sustainable, affordable access to digital content. Traditional tasks will progressively become mechanised. Alongside supporting learners, NHS librarians and knowledge specialists will take a greater role as knowledge brokers, delivering business critical services. They will support the NHS workforce to signpost patients and the public to high‐quality information. There is a need for greater efficiency and effectiveness through greater co‐operation and service mergers. Evaluation of service quality will focus more on outcomes, less on counting. These changes require an agile workforce, fit for the future. There is a bright future in which librarians’ expertise is used to mobilise evidence, manage and share knowledge, support patients, carers and families, optimise technology and social media and provide a keystone for improved patient care and safety.  相似文献   
106.
To analyze the factors associated with the types of violence against adolescents reported in Pernambuco, Brazil, from 2009 to 2012. Prevalence study conducted through an electronic database from the Violence Surveillance Official System in a population of 5259 adolescents (aged 10–19 years). Poisson regression was used, with significance level at 5%. There was a significant increase of 204% in the number of violence reports, and the number of reporting units increased by 92.6%. When separately evaluated, physical violence was the most prevalent type, accounting for 44.7% of the reports. Taking as independent variables the age range of 15–19 years, female, having no disability, and public roads as place of occurrence, the positively and independently associated factors were: male gender (OR 1.5, 95% CI 1.4–1.6) with physical violence; having deficiency (OR 1.7, 95% CI 1.5–2.0) with psychological violence; age range of 10–14 years (PR 2.4, 95% CI 2.2–2.6) with sexual assault; and male (OR 3.9, 95% CI 2.0–7.5), having disabilities (PR 4.6, 95% CI 2.7–9.7), and occurrence in residence (PR 2.8, 95% CI 1.3–6.1) with neglect. Age between 10 to 14 years was associated with the occurrence of sexual assault; male with the occurrence of physical violence and neglect; having disabilities with psychological violence and neglect; and occurrence in the residence was associated with neglect.  相似文献   
107.
澳大利亚国家图书馆展览政策研究   总被引:1,自引:0,他引:1  
李剑 《图书情报工作》2019,63(13):137-144
[目的/意义]国内图书馆对展览政策的研究较少,而国外图书馆在相关领域有比较成熟的做法。研究国外图书馆展览政策有助于促进国内图书馆展览工作的开展。[方法/过程]通过对澳大利亚国家图书馆展览政策与展品租借政策文本的梳理与研究,探索其有益做法对我国图书馆的启示。[结果/结论]我国图书馆应从4方面完善展览工作:①重视展览工作的组织建设;②重视对展览原则的研究;③结合国家文物保护政策制定展品借出政策;④结合我国实际制定展品借入政策。  相似文献   
108.
叶瑜 《科教文汇》2011,(4):123-123,132
中国传统符号的内容很多,怎么在现在的设计中做到古为今用,需要对中国传统符号的精髓彻底消化和贯通。  相似文献   
109.
110.
This systematic review includes 34 studies examining the effects of school-based physical activity interventions on students' health-related fitness knowledge. The study design, methodological quality, and effectiveness of interventions on students' health-related fitness knowledge were analysed. The majority of the studies (79.4%) revealed significant positive intervention effects on students' health-related fitness knowledge. Studies examining adolescents were more frequently in a position to influence students' health-related fitness knowledge (87.5%) than studies examining children (75%), and studies with low methodological quality (88.8%) had more frequent positive effects than studies with moderate quality (75%). The effects on students' health-related fitness knowledge were independent of moderator variables such as the intervention content, duration and frequency. Only few studies were able to simultaneously positively influence students' health-related fitness knowledge and students' physical activity and/or fitness levels. These programmes can positively influence students' health-related fitness knowledge, but it remains unclear what the practical significance of these changes is. Further research is needed to clarify the influence of students' health-related fitness knowledge on reflection, understanding, physical activity behaviour, and overall physical literacy levels.  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