全文获取类型
收费全文 | 25334篇 |
免费 | 399篇 |
国内免费 | 48篇 |
专业分类
教育 | 18226篇 |
科学研究 | 2272篇 |
各国文化 | 249篇 |
体育 | 1986篇 |
综合类 | 62篇 |
文化理论 | 221篇 |
信息传播 | 2765篇 |
出版年
2022年 | 163篇 |
2021年 | 264篇 |
2020年 | 418篇 |
2019年 | 570篇 |
2018年 | 806篇 |
2017年 | 893篇 |
2016年 | 822篇 |
2015年 | 498篇 |
2014年 | 656篇 |
2013年 | 4671篇 |
2012年 | 660篇 |
2011年 | 712篇 |
2010年 | 543篇 |
2009年 | 530篇 |
2008年 | 589篇 |
2007年 | 582篇 |
2006年 | 526篇 |
2005年 | 459篇 |
2004年 | 439篇 |
2003年 | 453篇 |
2002年 | 526篇 |
2001年 | 549篇 |
2000年 | 477篇 |
1999年 | 450篇 |
1998年 | 242篇 |
1997年 | 263篇 |
1996年 | 282篇 |
1995年 | 242篇 |
1994年 | 229篇 |
1993年 | 220篇 |
1992年 | 324篇 |
1991年 | 321篇 |
1990年 | 351篇 |
1989年 | 331篇 |
1988年 | 309篇 |
1987年 | 267篇 |
1986年 | 269篇 |
1985年 | 338篇 |
1984年 | 284篇 |
1983年 | 273篇 |
1982年 | 219篇 |
1981年 | 219篇 |
1980年 | 188篇 |
1979年 | 251篇 |
1978年 | 234篇 |
1977年 | 200篇 |
1976年 | 174篇 |
1975年 | 136篇 |
1974年 | 126篇 |
1973年 | 156篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
Sandra L De Groote Mary Shultz Marceline Doranski 《Journal of the Medical Library Association》2005,93(2):223-228
PURPOSE: The purpose was to determine the impact of online journals on the citation patterns of medical faculty. This study looked at whether researchers were more likely to limit the resources they consulted and cited to those journals available online rather than those only in print. SETTING: Faculty publications from the college of medicine at a large urban university were examined for this study. The faculty publications from a regional medical college of the same university were also examined in the study. The number of online journals available for faculty, staff, and students at this institution has increased from an initial core of 15 online journals in 1998 to over 11,000 online journals in 2004. METHODOLOGY: Searches by author affiliation were performed in the Web of Science to find all articles written by faculty members in the college of medicine at the selected institution. Searches were conducted for the following years: 1993, 1996, 1999, and 2002. Cited references from each faculty-authored article were recorded, and the corresponding cited journals were coded into four categories based on their availability at the institution in this study: print only, print and online, online only, and not owned. Results were analyzed using SPSS. RESULTS: The number of journals cited per year continued to increase from 1993 to 2002. The results did not indicate that researchers were more likely to cite online journals or were less likely to cite journals only in print. At the regional location where the number of print-only journals was minimal, use of the print-only journals did decrease in 2002, although not significantly. CONCLUSION/DISCUSSION: It is possible that electronic access to information (i.e., online databases) has had a positive impact on the number of articles faculty will cite. Results of this study suggest, at this point, that faculty are still accessing the print-only collection, at least for research purposes, and are therefore not sacrificing quality for convenience. 相似文献
62.
Linda M Hartman Rebecca A Abromitis Alice B Kuller Barbara A Epstein 《Journal of the Medical Library Association》2005,93(2):271-277
OBJECTIVE: A staff development committee (SDC) was convened to implement staff development opportunities for an academic health sciences library system comprised of three separate facilities. The charge for the SDC was to: (1) develop programs to enhance workplace skills and personal growth, (2) communicate the availability of existing programs at the university and medical center, and (3) encourage the staff to participate in these opportunities. PROGRAM: The committee created goals and objectives and developed a survey designed to give staff the opportunity to provide input for this initiative. With an 80% response rate, the survey results were used to plan 15 events based on staff needs and preferences. First-year attendance for SDC-sponsored events was 459. Committee members served as liaisons for each event. Two forms were developed to facilitate event planning. A monthly announcement sheet, email reminders, and the library's local area network are used to communicate upcoming SDC events and encourage attendance. CONCLUSION: This approach can serve as a useful model for similar program planning in any organization. 相似文献
63.
This paper analyses the publication patterns of researchers in the field of applied sciences at Universities of Technology in South Africa. Aspects investigated include publications in SCOPUS-listed journals; number of citations and countries of publication. Collaborative research patterns at national and international levels were also investigated. A bibliometric analysis approach was followed using SCOPUS as the main source of data and analysing the articles published in selected applied science disciplines. Results show that researchers in the field of applied sciences in universities of technology have increased their number of publications over the past 10?years and are also working in conjunction with other researchers both nationally and internationally. The analysis is an important addition to the field in South Africa which helps in measuring how institutions are positively responding to government incentives in research. The results are also important to information professionals who are increasingly playing an important role in research impact assessments. 相似文献
64.
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
65.
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
66.
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
67.
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
68.
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
69.
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
70.
Philip Kwaku Kankam 《International Information and Library Review》2018,50(2):88-93
The Internet clearly presents the opportunity for students to expand their knowledge at a fast pace, since they are able to access enormous amount of information. However, accessing the Internet also has its downside since not all information is of good quality. The study explored how 12th grade students at a high school in Ghana evaluated online information sources. These students and the head of the Information Communication Technology department respond to self-administered questionnaires and a semi-structured interview, respectively. The study found that most of the high school students did some kind of an evaluation of online information sources, however, they were not applying the right criteria. The study further revealed that students were not introduced to evaluation criteria at school and this had contributed to the gap in their evaluation competencies. 相似文献