全文获取类型
收费全文 | 11493篇 |
免费 | 247篇 |
国内免费 | 381篇 |
专业分类
教育 | 6873篇 |
科学研究 | 2261篇 |
各国文化 | 10篇 |
体育 | 449篇 |
综合类 | 544篇 |
文化理论 | 12篇 |
信息传播 | 1972篇 |
出版年
2024年 | 2篇 |
2023年 | 55篇 |
2022年 | 114篇 |
2021年 | 159篇 |
2020年 | 235篇 |
2019年 | 175篇 |
2018年 | 177篇 |
2017年 | 157篇 |
2016年 | 171篇 |
2015年 | 243篇 |
2014年 | 628篇 |
2013年 | 764篇 |
2012年 | 866篇 |
2011年 | 928篇 |
2010年 | 665篇 |
2009年 | 657篇 |
2008年 | 811篇 |
2007年 | 933篇 |
2006年 | 920篇 |
2005年 | 781篇 |
2004年 | 708篇 |
2003年 | 627篇 |
2002年 | 459篇 |
2001年 | 441篇 |
2000年 | 233篇 |
1999年 | 95篇 |
1998年 | 43篇 |
1997年 | 19篇 |
1996年 | 16篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1993年 | 8篇 |
1992年 | 5篇 |
1991年 | 6篇 |
1990年 | 7篇 |
1989年 | 2篇 |
1979年 | 1篇 |
1976年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
论析学科馆员有效学科联络的建立 总被引:2,自引:0,他引:2
学科联络是学科馆员的基本职责之一,从数字环境、馆藏预算及学科背景三方面分析学科馆员在网络环境下所面临的挑战。针对网络环境下学科馆员如何建立有效的学科联络,提出五点建议,建议包括明确不同联络对象的职责、积极开拓新的联络方法和渠道、重视个人联络的价值、在图书馆中培养有效的联络关系、与院系合作建立正常的学科联络。 相似文献
52.
随着环境问题日益凸显,我国不断增加环保投入,制定并施行环保政策,如何客观评价其成果和不足并确定未来工作方向也成为各方关注焦点。环境绩效评估则是衡量环境管理成效的重要工具之一。本文尝试将数据包络法应用到城市环境绩效评估研究中去,从投入和产出的角度构建城市环境绩效指标框架,对我国30个重点城市2012年的环境绩效进行实证评估,分析其环境绩效状况及改进目标,并对数据包络法在环境绩效评估中的适用性提出一定见解,希望能对我国环境绩效评估方法研究以及环境管理实践工作有所启示。 相似文献
53.
54.
网络环境下重构高校图书馆评估指标体系的思考 总被引:16,自引:0,他引:16
本文指出网络环境下现行高校图书馆评估指标体系已明显落后于时代发展的要求,提出重构高校图书馆评估指标体系的必要性及全新的评估指标体系应具有的导向性和应重点把握的原则。并结合《综合大学本科教学工作合格评价指标体系》中有关图书馆的评估指标,对高校图书馆评价指标体系相关项目提出质疑,并探讨了改进的方法。 相似文献
55.
Publication and patent behavior of academic researchers: Conflicting, reinforcing or merely co-existing? 总被引:1,自引:0,他引:1
Increasing entrepreneurial activity within academia has raised concerns that the number of publications added to the scientific commons might be reduced or that academic research would be directed exclusively towards the application-oriented needs of industry. In the case of academic inventions, the potential conflict between public- and private-oriented considerations seems most salient. In this contribution, we examine whether the publication behavior of academic inventors (at K.U. Leuven) differs from their colleagues (non-inventors) working within similar fields of research. Our analysis reveals that inventors publish significantly more. Moreover, no empirical evidence was found for the ‘skewing problem’. These findings not only suggest the co-existence of both activities; they may actually reinforce each other. 相似文献
56.
情报学理论在知识经济时代的发展完善 总被引:4,自引:1,他引:4
在知识经济时代,情报学作为与知识经济紧密联系的一门学科应该紧跟时代步伐,抓住时代机遇迅速发展。本文从知识经济的特点入手,从理论角度分析了情报学在知识经济时代的发展问题。 相似文献
57.
58.
在新的经济环境下,我国企业必须对其原有的营销渠道管理体系进行调整.具体做法是一要调整企业的营销渠道结构,二要由单一渠道转向多元化组合,三要建立电子商务平台,进行网络营销等. 相似文献
59.
Michelle Attard Tonna 《欧洲师范教育杂志》2017,40(1):91-109
Current reforms in the Maltese and Scottish educational contexts can only be fully implemented if teachers radically transform the way they teach. Teacher professional learning is an important mechanism that policy-makers, school leaders and administrators have to achieve this. Teacher professional learning is, above all, situated within the specific social workplace environment of teacher practice. Thus, schools need to be recognised as important sites of professional learning for teachers. In Malta and Scotland teachers were asked about their professional learning to identify how the learning environment within individual schools affects professional learning. In both countries, collaboration and school leadership were key components in determining a school’s learning environment. Data analysis led to the production of examples of expansive and restrictive features. Policy-makers, school leaders and administrators can use these features to examine how schools operate in terms of helping or hindering professional learning in the school environment. 相似文献
60.
Literacy and mathematical competencies are essential for a successful school career and precursors of these abilities develop in kindergarten. In addition to children’s early cognitive abilities, family characteristics such as the socioeconomic status and the home learning environment (HLE) are predictors of early child competencies. However, few studies outside the US and the UK have analyzed long-term effects of the early HLE on child development, simultaneously considering various explanatory factors. In this longitudinal study, data of 920 German children were obtained in kindergarten some 18 months before school entry (child mean age: 4;10). At this point, precursors of reading, spelling and mathematics were assessed. In addition, parents were asked to complete surveys on family characteristics. Child assessments were repeated with standardized measures of mathematical and literacy abilities at the end of Grade 1 and in the middle of Grade 4 (child mean age: 9;9), the final grade in German elementary schools. In Grade 4, teachers were also asked to provide their recommendation for children’s secondary school track (“Hauptschule” for lowest secondary school track, “Realschule”, or “Gymnasium” as highest secondary school track). HLE was not only a good predictor of early abilities, but also directly predicted competencies at the end of elementary school when precursors, former academic achievement and child and family characteristics were controlled for. In addition, children living in more favorable HLEs were more likely to be recommended for higher secondary school tracks by their teachers. 相似文献