全文获取类型
收费全文 | 6223篇 |
免费 | 158篇 |
国内免费 | 110篇 |
专业分类
教育 | 3768篇 |
科学研究 | 710篇 |
各国文化 | 6篇 |
体育 | 1296篇 |
综合类 | 437篇 |
文化理论 | 8篇 |
信息传播 | 266篇 |
出版年
2024年 | 3篇 |
2023年 | 25篇 |
2022年 | 47篇 |
2021年 | 153篇 |
2020年 | 183篇 |
2019年 | 185篇 |
2018年 | 173篇 |
2017年 | 175篇 |
2016年 | 180篇 |
2015年 | 179篇 |
2014年 | 338篇 |
2013年 | 767篇 |
2012年 | 506篇 |
2011年 | 492篇 |
2010年 | 284篇 |
2009年 | 272篇 |
2008年 | 329篇 |
2007年 | 405篇 |
2006年 | 403篇 |
2005年 | 296篇 |
2004年 | 291篇 |
2003年 | 220篇 |
2002年 | 174篇 |
2001年 | 149篇 |
2000年 | 92篇 |
1999年 | 50篇 |
1998年 | 28篇 |
1997年 | 23篇 |
1996年 | 18篇 |
1995年 | 12篇 |
1994年 | 11篇 |
1993年 | 3篇 |
1992年 | 12篇 |
1991年 | 6篇 |
1990年 | 1篇 |
1989年 | 4篇 |
1976年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有6491条查询结果,搜索用时 15 毫秒
31.
从人的生命活动的实际需要出发,分析了人的精神生命活动特点,并指出体育教学的实现就是基于人的生命活动。通过分析目前高校体育教学存在的弊端,提出了有利于人的精神生命活动的体育教学改革基本思路。 相似文献
32.
少年儿童图书馆的延伸服务实践 总被引:1,自引:0,他引:1
以少儿图书馆的实践为基础,从读者服务、读书活动两方面入手,论述了与企业合办分馆、网络信息服务、广场读书活动、读书夏令营等图书馆延伸服务的可行性. 相似文献
33.
N. Yu. Berezkina O. N. Sikorskaya 《Scientific and Technical Information Processing》2008,35(6):256-259
The publication activity of Russian and Belarussian scientists, the degree of reflection of their papers in Scopus databases, and the data on the citation of Belarussian authors in the works of other researchers are discussed. 相似文献
34.
科学技术活动的指标、数学模型等问题是一个讨论多年而未解决的问题,本文从科学技术活动的投入产出角度提出了相应的指标系列;并从科学技术投入产出的一因一果关系、多因一果关系、多因多果关系、线性与非线性关系等方面提出了相应的数学模型及定义定理;最后,根据这些定义定理,提出了科学技术发展在正常时期 (继承发展时期)和非常时期(转化、革命时期)的有关推论。 相似文献
35.
把《科学技术发展的数学原理》和《科学技术研究业经济学原理》两书的新观点进行归类述评,包括作者提出的科技发展因果性规律、科技纵向发展规律、科技结构演化规律、科技活动效益变化规律四个方面。最后就该论著的基本特点与总体价值上从创新性、系统性、量化性、实用性进行了评价。 相似文献
36.
As the number and diversity of distributed Web databases on the Internet exponentially increase, it is difficult for user
to know which databases are appropriate to search. Given database language models that describe the content of each database,
database selection services can provide assistance in locating databases relevant to the information needs of users. In this
paper, we propose a database selection approach based on statistical language modeling. The basic idea behind the approach
is that, for databases that are categorized into a topic hierarchy, individual language models are estimated at different
search stages, and then the databases are ranked by the similarity to the query according to the estimated language model.
Two-stage smoothed language models are presented to circumvent inaccuracy due to word sparseness. Experimental results demonstrate
that such a language modeling approach is competitive with current state-of-the-art database selection approaches. 相似文献
37.
基于P2P的适应性信息检索系统的设计 总被引:3,自引:1,他引:3
江淇 《现代图书情报技术》2005,21(9):41-44
针对现有搜索引擎的不足,提出了一个基于P2P的适应性信息检索系统设计方案,详细介绍了系统的各主要模块的功能和技术方法,进而分析了该模型的优势。 相似文献
38.
县级图书馆在农村读书活动中的引领作用 总被引:5,自引:0,他引:5
论文从开展读书活动的必要性、具体措施和收获三方面论述了县级图书馆应在开展农村读书活动中积极发挥引领作用。 相似文献
39.
Heather E. Canary Kris May Marc D. Rinehart Jahn B. Barlow 《Journal of Applied Communication Research》2018,46(2):202-222
Organizational communication scholars are increasingly called upon to use theoretical knowledge to address problematic processes in public institutions. This article reports a process improvement project focused on a university conflict of interest (COI) policy as an example of how scholars can engage theory to improve ongoing policy processes. The project team included communication scholars and research administration staff who designed, implemented, and evaluated the mixed-methods project guided by structurating activity theory. Baseline survey results were used to design the process improvement project. Results of the follow-up survey indicate that researchers who participated in some aspect of the process improvement project (i.e. attending a policy café, using the redesigned website, or reading the new Quick Reference Guide) reported higher levels of policy communication and knowledge and more positive attitudes toward the COI policy than researchers who had not engaged with process improvement efforts. We offer theoretical and practical implications of results for organizational communication scholars and practitioners. 相似文献
40.
Jiawei Huang Mahda M. Bagher Heather Dohn Ross Nathan Piekielek Jan Oliver Wallgrün Jiayan Zhao 《Journal of Map & Geography Libraries》2018,14(1):40-63
Libraries have been the key to preserving culture and historic legacy for centuries. One such treasure cataloged in The Pennsylvania State University (Penn State) Libraries is a collection of over 33,000 Sanborn? Fire Insurance Maps. Originally kept safe in metal drawers, the library has embarked on a journey to digitize this abundance of information, combine it with other media such as photographs, and make it accessible through a web interface. Inspired by these efforts, we accessed this information and took it to the next level. Using state of the art 3D modeling and immersive technologies, we created a historic 3D model and immersive experiences of Penn State, exemplarily for the 1922 campus. The resulting experiences can be accessed through the web but also through head mounted displays (HMDs) and mobile phones in combination with VR viewers such as the Google Cardboard. Additionally, they can be used anywhere in the world or on the campus itself as a way to enable remote and in situ experiences and learning. Immersive experiences let us connect to the past, the present and the future, and as such offer value to digital cultural heritage efforts. 相似文献