全文获取类型
收费全文 | 45526篇 |
免费 | 658篇 |
国内免费 | 44篇 |
专业分类
教育 | 32690篇 |
科学研究 | 4170篇 |
各国文化 | 430篇 |
体育 | 3330篇 |
综合类 | 52篇 |
文化理论 | 433篇 |
信息传播 | 5123篇 |
出版年
2022年 | 293篇 |
2021年 | 458篇 |
2020年 | 694篇 |
2019年 | 1042篇 |
2018年 | 1844篇 |
2017年 | 1930篇 |
2016年 | 1637篇 |
2015年 | 823篇 |
2014年 | 1178篇 |
2013年 | 8295篇 |
2012年 | 1173篇 |
2011年 | 1425篇 |
2010年 | 1112篇 |
2009年 | 990篇 |
2008年 | 1155篇 |
2007年 | 1118篇 |
2006年 | 809篇 |
2005年 | 808篇 |
2004年 | 820篇 |
2003年 | 707篇 |
2002年 | 708篇 |
2001年 | 811篇 |
2000年 | 744篇 |
1999年 | 718篇 |
1998年 | 393篇 |
1997年 | 425篇 |
1996年 | 472篇 |
1995年 | 418篇 |
1994年 | 375篇 |
1993年 | 376篇 |
1992年 | 587篇 |
1991年 | 565篇 |
1990年 | 600篇 |
1989年 | 576篇 |
1988年 | 520篇 |
1987年 | 510篇 |
1986年 | 481篇 |
1985年 | 591篇 |
1984年 | 480篇 |
1983年 | 454篇 |
1982年 | 386篇 |
1981年 | 368篇 |
1980年 | 327篇 |
1979年 | 474篇 |
1978年 | 384篇 |
1977年 | 348篇 |
1976年 | 302篇 |
1975年 | 260篇 |
1974年 | 266篇 |
1973年 | 258篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
131.
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
132.
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
133.
P. A. Kalachikhin 《Scientific and Technical Information Processing》2018,45(1):28-34
The issues related to funding of public research organizations are explored. The history of scientometric information systems is outlined. The advantages and disadvantages of a bibliometric approach to financing of research organizations are analyzed. The link between the assessment of the scientific and technological potential of an institution and the optimal allocation of funds is investigated. Recommendations on how to improve the efficiency of public resources allocated for scientific research are presented. 相似文献
134.
I. I. Potapov 《Scientific and Technical Information Processing》2018,45(2):63-69
Modern global eco-dynamics problems are discussed. It is noted that global changes are mostly characterized by several key features, such as their multicomponent nature, as well as interactivity and nonlinearity. These features challenge various forecast estimates in such a way that the concept of forecasting has been replaced over the last few years by a much more ambiguous concept of scenarios. The vagueness of scenarios is due to the problem of global climate change. A global climate–nature–society system model is outlined. 相似文献
135.
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
136.
Michael M. Widdersheim 《Library & information science research》2018,40(2):144-152
History and case study are two diachronic research strategies commonly used to study political discourse as it relates to public libraries. Though suitable for some studies, these strategies are inexhaustive. A new, blended research strategy is therefore needed to accomplish what history and case study alone cannot. This hybrid strategy, historical case study, must analyze cases from the distant past to the present, using eclectic data sources, in order to produce both idiographic and nomothetic knowledge. To develop historical case study, the universal components of diachronic analysis are first identified. A general research design for historical case study is then introduced. Finally, historical case study is tested in an actual research project. Findings from this project reveal that historical case study is a successful diachronic research strategy. Historical case study is a new and valuable research design suitable for addressing questions related to change, continuity, development, and evolution. 相似文献
137.
Increased genetic testing in personalized medicine presents unique challenges for couples, including managing disease risk and potential discrimination as a couple. This study investigated couples’ conflicts and support gaps as they coped with perceived genetic discrimination. We also explored the degree to which communal coping was beneficial in reducing support gaps and ultimately stress. Dyadic analysis of married adults (N?=?266, 133 couples), in which one person had the genetic risk for serious illness, showed that perceived discrimination predicted more frequent conflicts about alpha-1 antitrypsin deficiency-related treatment, privacy boundaries, and finances, which, in turn, predicted wider gaps in emotion and esteem support, and greater stress for both spouses. Communal coping predicted lower support gaps for both partners and marginally lower stress. 相似文献
138.
Genetics Home Reference is a free, online resource created and maintained by the National Library of Medicine. It is designed to provide genetic information to a wide variety of audiences, particularly the general public. The site consists of original information and links to other curated resources. 相似文献
139.
140.
The library literature evaluating the efficacy of online tutorial methods and delivery tools is a valuable resource for librarians looking for information to inform their choices for developing asynchronous online instruction. This literature, however, examines a wide variety of delivery tools, methods, and student populations. As a result, it is difficult to draw definitive conclusions about any one tutorial tool or method. This article compares selected research and concludes that the consensus in the literature suggests that applying adult learning principles to library tutorials has a larger impact on effective online instruction than the individual tool. 相似文献