全文获取类型
收费全文 | 20321篇 |
免费 | 244篇 |
国内免费 | 54篇 |
专业分类
教育 | 14898篇 |
科学研究 | 1689篇 |
各国文化 | 179篇 |
体育 | 1343篇 |
综合类 | 52篇 |
文化理论 | 144篇 |
信息传播 | 2314篇 |
出版年
2022年 | 107篇 |
2021年 | 205篇 |
2020年 | 243篇 |
2019年 | 380篇 |
2018年 | 589篇 |
2017年 | 668篇 |
2016年 | 681篇 |
2015年 | 450篇 |
2014年 | 520篇 |
2013年 | 3574篇 |
2012年 | 607篇 |
2011年 | 640篇 |
2010年 | 500篇 |
2009年 | 442篇 |
2008年 | 495篇 |
2007年 | 457篇 |
2006年 | 476篇 |
2005年 | 1047篇 |
2004年 | 775篇 |
2003年 | 562篇 |
2002年 | 375篇 |
2001年 | 439篇 |
2000年 | 328篇 |
1999年 | 280篇 |
1998年 | 175篇 |
1997年 | 174篇 |
1996年 | 186篇 |
1995年 | 156篇 |
1994年 | 161篇 |
1993年 | 144篇 |
1992年 | 221篇 |
1991年 | 214篇 |
1990年 | 246篇 |
1989年 | 219篇 |
1988年 | 183篇 |
1987年 | 186篇 |
1986年 | 192篇 |
1985年 | 178篇 |
1984年 | 184篇 |
1983年 | 172篇 |
1982年 | 147篇 |
1981年 | 143篇 |
1980年 | 139篇 |
1979年 | 198篇 |
1978年 | 164篇 |
1977年 | 115篇 |
1976年 | 124篇 |
1975年 | 113篇 |
1973年 | 105篇 |
1971年 | 117篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
Jennifer L. Jones 《图书馆管理杂志》2018,58(1):54-64
As academic libraries' budgets remain flat while their expenditures rise, library leaders must seek out alternative sources of funding. One option is a mandatory student fee dedicated to the library. This article presents the results of a survey of 152 deans and directors of public R1 and R2 research universities that were asked whether their libraries benefit from mandatory student fees. While a library-specific fee is unusual, nearly half of responding libraries are eligible to receive some portion of another mandatory student fee. Study results can serve as evidence for libraries preparing to make a case for the significant, positive impact possible through even a modest library fee. 相似文献
52.
53.
E.?I.?KozlovaEmail author O.?A.?Antoshkova 《Scientific and Technical Information Processing》2018,45(1):14-21
This paper characterizes the methodological foundations of national standardization in the Russian Federation, in particular in the library and information field. The activities of Technical Standardization Committee 191 Scientific and Technical Information, Librarianship, and Publishing are reported. 相似文献
54.
The basic properties of the blockchain technology are discussed to allow informed decisions on its selection and use in scientific and information activities. Specific examples are given and the efficiency of this technology is analyzed. 相似文献
55.
This paper explores the information nature of culture. It is represented as an extragenetic and nonorganizational information process and system. Information is regarded as a universal property of matter that is essentially associated with development processes and realizes various forms and ways of storage and circulation at various development stages of global evolution. The socio-cultural principle of exogenous accumulation, transmission, and transformation of information is analyzed in the context of the continuing growth of the information content of material systems on the superhighway of global-universal evolution. It is noted that the information concept of culture evolves into a new area of cultural studies, that is information and cultural studies, advancing our understanding of the nature of culture and cultural genesis. 相似文献
56.
I. V. Zibareva L. Yu. Ilina B. L. Alperin 《Scientific and Technical Information Processing》2018,45(2):106-109
The current state of the Russian Science Citation Index is analyzed. Several areas for its further development identified by long-standing active users, such as data searching, refinement, and storage; current user alerts; data input with the Science Index license; patent information; and the application programming interface (API) are investigated. 相似文献
57.
Nathan Walter Sheila T. Murphy Erica L. Rosenthal 《Communication Research Reports》2018,35(5):402-412
The study explored the role of second-screen use and binge-watching in moderating entertainment education (EE) effects. A pretest/posttest experiment of 273 viewers of East Los High measured the effects of exposure to three subplots, concerning alcohol abuse, abortion, and immigration. The effect of identification with characters on change in attitudes was significantly moderated by second-screen use and binge-watching. In particular, second-screening tended to enhance the positive impact of identification; whereas, among respondents who binge-watched the show, the effects of identification were weaker. 相似文献
58.
Jayson L. Dibble 《Communication Research Reports》2018,35(2):112-120
Is the reluctance to share bad news (i.e., the MUM effect) motivated more by a public display or private concern, and does it benefit mainly the messenger or the recipient? An experiment (N = 309) that crossed good/bad news with three communication channels (face-to-face, text messaging, e-mail) revealed that messenger reluctance was greatest under conditions of bad news and did not vary based on the channel through which the recipient contacted the messenger. In contrast with earlier work, this MUM effect was more consistent with a private fear of distressing the recipient. Theoretical implications and limitations are discussed. 相似文献
59.
双星滑动聚束模式合成孔径雷达(SAR)既保持了双星SAR的灵活性、可靠性和稳定性,同时还可产生高分辨率的图像对,对于观测和测绘具有巨大的潜力.这种模式下需要兼顾双星成像与多普勒带宽显著增加的问题.分析双星滑动聚束SAR系统下目标的多普勒特性,结合双星成像算法与频谱分析法,提出一种基于双曲等效的双星滑动聚束SAR 2步成... 相似文献
60.