全文获取类型
收费全文 | 14672篇 |
免费 | 324篇 |
国内免费 | 273篇 |
专业分类
教育 | 8901篇 |
科学研究 | 2326篇 |
各国文化 | 98篇 |
体育 | 1308篇 |
综合类 | 724篇 |
文化理论 | 150篇 |
信息传播 | 1762篇 |
出版年
2023年 | 51篇 |
2022年 | 210篇 |
2021年 | 472篇 |
2020年 | 395篇 |
2019年 | 381篇 |
2018年 | 462篇 |
2017年 | 496篇 |
2016年 | 400篇 |
2015年 | 587篇 |
2014年 | 721篇 |
2013年 | 1554篇 |
2012年 | 922篇 |
2011年 | 964篇 |
2010年 | 900篇 |
2009年 | 782篇 |
2008年 | 816篇 |
2007年 | 869篇 |
2006年 | 805篇 |
2005年 | 668篇 |
2004年 | 392篇 |
2003年 | 369篇 |
2002年 | 383篇 |
2001年 | 334篇 |
2000年 | 207篇 |
1999年 | 190篇 |
1998年 | 162篇 |
1997年 | 118篇 |
1996年 | 111篇 |
1995年 | 83篇 |
1994年 | 75篇 |
1993年 | 63篇 |
1992年 | 62篇 |
1991年 | 27篇 |
1990年 | 35篇 |
1989年 | 26篇 |
1988年 | 10篇 |
1987年 | 7篇 |
1986年 | 6篇 |
1985年 | 14篇 |
1984年 | 12篇 |
1983年 | 8篇 |
1981年 | 9篇 |
1980年 | 7篇 |
1978年 | 8篇 |
1977年 | 9篇 |
1976年 | 5篇 |
1974年 | 5篇 |
1972年 | 5篇 |
1957年 | 9篇 |
1870年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
101.
我国图书馆知识管理研究进展述评 总被引:16,自引:0,他引:16
本文采用文献统计的方法,对近几年来国内有关图书馆知识管理的期刊论文进行了统计分析,以期对我国图书馆知识管理的研究进展的动态和成果进行一番考察,进而讨论研究中存在的问题,并对今后的研究发展提出了建议。 相似文献
102.
103.
产业政策发力,推动广播媒体迈向新台阶。广播业不仅在事业上继续进步,而且在产业经营的道路上已经起步。收听率上升,广告实行代理制,多种联合开始,跨媒体、跨行业、跨地域经营已有先例。再努力:广播节目市场化程度不高,缺少规范的交易平台,收入来源对广告依赖性过大,广播广告与其他媒体广告相比较所占份额过低,广播的地区性发展不平衡。 相似文献
104.
[目的/意义] 针对均等化视角下中美社区图书馆阅读推广实践的差异进行比较分析,旨在中美社区图书馆相互借鉴的基础上,提高社区图书馆的服务水平和质量。[方法/过程] 以中国宁波市社区图书馆、美国密尔沃基市社区图书馆为例,利用个案分析和对比分析的方法比较中美社区图书馆开展的阅读推广均等化实践。[结果/结论] 通过对社区图书馆服务的供给均等、过程均等和消费均等的对比与分析,得出均衡资源配置、实现阅读推广供给均等化,创新文化活动形式与内容、实现阅读推广过程均等化,尊重读者自由选择权利、实现阅读推广消费均等化,依托文化特色、宣传社区图书馆均等化服务以及构建城市社区公共文化服务平台,共建、共享社会文明新成果的启示。 相似文献
105.
[目的/意义] 针对学术期刊文本资源语义标注仍存在的通用本体难以构建、标注粒度单一两大问题,提出基于SKOS的学术期刊多粒度语义标注方法,从而进一步推进语义标注的应用发展,更好满足用户的多粒度学术信息需求。[方法/过程] 在对《中国汉语主题词表》进行SKOS描述的基础上,以学术期刊文本资源为对象,实现其多粒度语义标注,并通过实证研究验证该方法的可行性。[结果/结论] 利用SKOS实现对学术期刊文本资源进行多粒度语义标注,较之当前学术检索系统中的标注结果,在"查全"查准"内部特征检索入口"检索结果反馈形式"4个方面具有一定优势。 相似文献
106.
107.
Jorge Peña Subuhi Khan Christopher N. Burrows Hart Blanton 《Communication Research Reports》2018,35(4):293-302
This study examined whether persuasive health messages embedded in shooter games have broad or targeted effects on players’ willingness to engage in risk behaviors (N = 145). Participants presented with in-game health messages discouraging alcohol-impaired driving of motor vehicles showed reduced willingness to drink alcohol and to operate both motor and nonmotor vehicles, compared to those in a no-message gaming control condition. There were no spillover effects on willingness to smoke cigarettes or marijuana, thus implying targeted persuasive effects. In addition, players experiencing high instead of low cognitive load showed decreased postexperiment willingness to drink and operate nonmotor vehicles, thus suggesting that playing a game under high cognitive load can influence players’ attitudes. The findings replicate previous research and further expand on knowledge-activation and thought-disruption mechanisms underlying the persuasiveness of health messages. 相似文献
108.
Debasis?GangulyEmail authorView authors OrcID profile Gareth?J.?F.?Jones Aarón?Ramírez-de-la-Cruz Gabriela?Ramírez-de-la-Rosa Esaú?Villatoro-Tello 《Information Retrieval》2018,21(1):1-23
Automatic detection of source code plagiarism is an important research field for both the commercial software industry and within the research community. Existing methods of plagiarism detection primarily involve exhaustive pairwise document comparison, which does not scale well for large software collections. To achieve scalability, we approach the problem from an information retrieval (IR) perspective. We retrieve a ranked list of candidate documents in response to a pseudo-query representation constructed from each source code document in the collection. The challenge in source code document retrieval is that the standard bag-of-words (BoW) representation model for such documents is likely to result in many false positives being retrieved, because of the use of identical programming language specific constructs and keywords. To address this problem, we make use of an abstract syntax tree (AST) representation of the source code documents. While the IR approach is efficient, it is essentially unsupervised in nature. To further improve its effectiveness, we apply a supervised classifier (pre-trained with features extracted from sample plagiarized source code pairs) on the top ranked retrieved documents. We report experiments on the SOCO-2014 dataset comprising 12K Java source files with almost 1M lines of code. Our experiments confirm that the AST based approach produces significantly better retrieval effectiveness than a standard BoW representation, i.e., the AST based approach is able to identify a higher number of plagiarized source code documents at top ranks in response to a query source code document. The supervised classifier, trained on features extracted from sample plagiarized source code pairs, is shown to effectively filter and thus further improve the ranked list of retrieved candidate plagiarized documents. 相似文献
109.
110.
Against the backdrop of Spain’s Transparency Act, this article discusses the presence or otherwise of a series of document types, proposed as management-related transparency indicators, on 61 (8 national and 53 provincial) historic archive websites. Although examples of good practice were identified, the information provided was found to be scant, in particular as regards lines of action, organisational objectives and yearly reports. The information most commonly provided on the websites included the collection classification chart, service use regulations and citizen charters. The inference drawn was that archives, so intently focused on their role in the application of the Act by the organisations they serve, neglect their own administrative obligations in respect of its provisions. The recommendation is that as government-funded and subsidised public service institutions, historic archives should exercise transparency by furnishing the information stipulated in the Act on their websites. 相似文献