全文获取类型
收费全文 | 17233篇 |
免费 | 262篇 |
国内免费 | 54篇 |
专业分类
教育 | 12726篇 |
科学研究 | 1183篇 |
各国文化 | 182篇 |
体育 | 1259篇 |
综合类 | 44篇 |
文化理论 | 79篇 |
信息传播 | 2076篇 |
出版年
2021年 | 188篇 |
2020年 | 248篇 |
2019年 | 372篇 |
2018年 | 534篇 |
2017年 | 569篇 |
2016年 | 522篇 |
2015年 | 340篇 |
2014年 | 473篇 |
2013年 | 3477篇 |
2012年 | 460篇 |
2011年 | 479篇 |
2010年 | 421篇 |
2009年 | 402篇 |
2008年 | 424篇 |
2007年 | 402篇 |
2006年 | 412篇 |
2005年 | 367篇 |
2004年 | 261篇 |
2003年 | 251篇 |
2002年 | 235篇 |
2001年 | 369篇 |
2000年 | 289篇 |
1999年 | 256篇 |
1998年 | 161篇 |
1997年 | 162篇 |
1996年 | 175篇 |
1995年 | 146篇 |
1994年 | 156篇 |
1993年 | 141篇 |
1992年 | 223篇 |
1991年 | 210篇 |
1990年 | 245篇 |
1989年 | 220篇 |
1988年 | 176篇 |
1987年 | 187篇 |
1986年 | 189篇 |
1985年 | 176篇 |
1984年 | 185篇 |
1983年 | 171篇 |
1982年 | 140篇 |
1981年 | 141篇 |
1980年 | 138篇 |
1979年 | 196篇 |
1978年 | 164篇 |
1977年 | 117篇 |
1976年 | 125篇 |
1975年 | 112篇 |
1974年 | 99篇 |
1973年 | 106篇 |
1971年 | 118篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
Jessica L. Ford Jacob S. Ford Seth S. Frei Andrew Pilny Brenda L. Berkelaar 《Journal of Applied Communication Research》2016,44(3):316-335
Persistent school shootings have generated ongoing pressure to assess and enhance crisis communication effectiveness via strategies such as resilience-building and post-crisis restoration. A network perspective offers a robust, multilevel approach for examining complex information flows among community, campus, and individual actors affected by crises. Drawing on relational and structural embeddedness and Uncertainty Management Theory, we offer nine propositions that help explain structural and relational changes in a network over time. Although theoretically driven, these propositions are primarily functional, offering practical implications for safety officials and administrators trying to understand, prepare for, and respond to crises. Thus, we suggest measures and recommendations to improve information flow, uncertainty management, and resilience before, during, and after a crisis. 相似文献
122.
The unforeseen trials of arts-based research may suppress creative and innovative explorations. Photovoice, a visual method of investigation employing participatory photography, presents a host of apprehensions. Yet, photovoice is both a valid and rich methodology that can greatly expand the reach and scope of applied communication research. In this essay, we – three applied communication researchers – discuss the complexities of photovoice, highlighting areas of consideration that interested researchers should contemplate before utilizing this methodology. Briefly exploring three of our research studies and their varying topics (i.e. long-term cancer survivors, domestic violence organizational advocacy, male body culture), we discuss three broad areas of difficulty in photovoice research: analysis, control, and exposure. Despite the unique obstacles that photovoice presents, we argue that it, along with other forms of arts-based research, are profitable and definitely worth the challenge. 相似文献
123.
124.
Rapid advances in technology have provided the potential to connect citizens to their surroundings in unprecedented ways. While many scholars examine different types of efficacy as a predictor of behavior (e.g., internal, external, and political), it is essential to examine how confident citizens feel in their ability to use the technology before understanding how they will use it politically. Research shows that perceived competence increases motivation, which is correlated with behavior. This study examined how traditional measures of efficacy and a new measure affect online political behaviors, concluding that technological efficacy is a reliable construct predicting online news use and expression. 相似文献
125.
Jane L. Down 《文物保护研究》2016,61(1):26-45
This paper examines the effect of modifiers on the stability of a vinyl acetate/ethylene copolymer dispersion adhesive upon aging. Eighteen common modifiers were added to a well-characterized vinyl acetate/ethylene copolymer dispersion (Dur-O-Set® E-150) in known concentrations and dry-film samples were subjected to 16–17 years of dark aging and seven to eight years of light aging. Yellowing, pH, gloss, swelling, cohesive strength, and flexibility were monitored for changes upon aging. Generally, the neat Dur-O-Set® E-150 (no additives) was found to become acidic on aging, but was fairly resistant to yellowing. It also swelled substantially in toluene, was of high gloss, medium strength, and flexible, and remained so on aging. No modifier was found to improve these properties. Various solvents, wetting agents, and thickeners did not alter the properties by much, while plasticizers, freeze-thaw stabilizer, glycerin, and certain fillers had a more negative effect. 相似文献
126.
Shannon Regan 《期刊图书馆员》2016,70(1-4):89-99
The responsibility for and the initiative to preserve electronic journal content is neither clear nor easy, and knowing the preservation status of an e-journal is not a basic step within the NASIG Core Competencies for Electronic Resources Librarians life cycle of electronic resources management. Columbia and Cornell University Libraries secured funding for a project to specifically evaluate strategies for expanding e-journal preservation. A wide range of e-journal categories are evaluated within the scope of the project, including: content direct from publishers, small and society publishers, Open Access e-journals, full-text content from third-party content providers, and university generated e-journals. Discussed are techniques for identifying at risk e-journals, integrating preservation into license negotiation with publishers, tracking the preservation status of e-journals, and developing relationships with existing preservation agencies. The quality of future of scholarship and teaching hinges on the preservation of the scholarly record. 相似文献
127.
Access and Express: Professional Perspectives on Public Library Makerspaces and Intellectual Freedom
Shannon Crawford Barniskis 《Public Library Quarterly》2016,35(2):103-125
This study examines the roles of makerspaces and librarians in public libraries, as defined by nine librarians instituting makerspace services. It explores their understanding of creative spaces and library policy, specifically the foundational principles of intellectual freedom and access. Using constructivist discourse analysis tools, this study analyzes interview data to illuminate a concept of access grounded in expression, incorporating hands-on activities, tools, and social connections. This study has implications for practitioners and policymakers in reconsidering access as a positive liberty enabled by social contexts, and librarians’ enzymatic roles in facilitating those contexts. 相似文献
128.
Loriene Roy Maria Barker Lanita L. Hidalgo Frances A. Rickard 《Public Library Quarterly》2016,35(3):222-242
Public libraries across the country design and deliver programs for military veterans and their families, often collaborating with other organizations and agencies. The examples were assembled from both general and specialized interviews with librarians, and literature and Internet searches, with summaries of programs assembled and written by multiple researchers. The specific limitations on the listing in this article are clearly outlined in the first section. Overall, however, the article provides a good introductory overview of what’s going on in veteran’s programs and services in America’s public libraries in over seventy libraries in forty states. We hope this list of what public libraries have organized or are doing will supply other public librarians with ideas on how to provide new services or enhance their existing ones. 相似文献
129.
130.