全文获取类型
收费全文 | 6310篇 |
免费 | 125篇 |
国内免费 | 20篇 |
专业分类
教育 | 4436篇 |
科学研究 | 680篇 |
各国文化 | 50篇 |
体育 | 445篇 |
综合类 | 7篇 |
文化理论 | 43篇 |
信息传播 | 794篇 |
出版年
2023年 | 38篇 |
2022年 | 55篇 |
2021年 | 80篇 |
2020年 | 138篇 |
2019年 | 194篇 |
2018年 | 241篇 |
2017年 | 282篇 |
2016年 | 229篇 |
2015年 | 155篇 |
2014年 | 227篇 |
2013年 | 1089篇 |
2012年 | 181篇 |
2011年 | 184篇 |
2010年 | 167篇 |
2009年 | 135篇 |
2008年 | 139篇 |
2007年 | 171篇 |
2006年 | 131篇 |
2005年 | 100篇 |
2004年 | 110篇 |
2003年 | 86篇 |
2002年 | 95篇 |
2001年 | 116篇 |
2000年 | 140篇 |
1999年 | 95篇 |
1998年 | 82篇 |
1997年 | 76篇 |
1996年 | 73篇 |
1995年 | 50篇 |
1994年 | 52篇 |
1993年 | 39篇 |
1992年 | 83篇 |
1991年 | 75篇 |
1990年 | 67篇 |
1989年 | 67篇 |
1988年 | 77篇 |
1987年 | 64篇 |
1986年 | 83篇 |
1985年 | 76篇 |
1984年 | 61篇 |
1983年 | 71篇 |
1982年 | 55篇 |
1981年 | 45篇 |
1979年 | 54篇 |
1978年 | 53篇 |
1977年 | 40篇 |
1976年 | 44篇 |
1975年 | 33篇 |
1974年 | 40篇 |
1973年 | 38篇 |
排序方式: 共有6455条查询结果,搜索用时 15 毫秒
41.
Yu. N. Schuko 《Scientific and Technical Information Processing》2018,45(3):163-167
Although the USSR and the United States had a comparable number of employees in the field of scientific information, there was a substantial difference in funding, which resulted in a lack of information support for Soviet scientists. While 90% of the publications in the United States were available almost immediately after their release, in the USSR they were delayed by 1.5 to 2 years. Since the publication of the Abstracts Journal by VINITI (AJ), its content was consistently expanding and reached its peak in 1990 (1.5 million documents per year). The next quarter of a century was characterized by a decline in both the composition of the AJ and the time required for its document coverage. The steps for restructuring VINITI activities are discussed. The focus is made on improving the limited coverage of the Russian-language part of the global flow of scientific information by Western information systems. 相似文献
42.
Broad and discipline-specific information literacy competencies must be mastered by science, technology, engineering, and math (STEM) students. This study assessed changes in student perceptions of their competency in information literacy after continuous efforts in course curriculum. Data were gathered in 2015–2016 from first year interdisciplinary project-based courses with STEM students to assess changes in information literacy competencies. Analyses suggested there was a significant increase in students' perception of their familiarity with library resources, search strategies, citation use, and ability to evaluate source quality. There was no change in their perception of their ability to evaluate the variety of source and source relevance and a decrease in their perception of the ethical use of information. With faculty-librarian partnership and integrated instruction in a first year course, students showed the largest perceived increases in foundational information literacy skills but struggled with information literacy abilities. This study provides a baseline of information literacy competencies of first year students and provides recommendations for continuing education. 相似文献
43.
Devendra Potnis Kanchan Deosthali Xiaohua Zhu Rebecca McCusker 《Library & information science research》2018,40(2):106-117
Academic libraries invest millions of dollars to make electronic resources such as e-books available to students for free. However, free access might not necessarily result in students' sustained interest in and use of e-books. This interdisciplinary, mixed methods research investigates the factors influencing the intention of 279 undergraduate students to use e-books at a land-grant university in the southern US. Structural equation modeling of the survey responses suggests that organizational environment for information technology, external locus of control, subjective norm, perceived enjoyment (i.e., joyfulness), and information technology features play a significant role in influencing the intention of students to use e-books. Based on a combination of quantitative results and qualitative findings, this study identifies eight activities that libraries need to undertake in order to increase the use of e-books by undergraduate students. 相似文献
44.
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
45.
Rebecca M. LaFountain 《Innovative Higher Education》1995,20(1):19-31
This study examines the relationship between course intensity and long-term retention on graduate level counseling students enrolled in a research and statistics course. It confirms earlier findings of time and learning studies, which have primarily dealt with end-of-course outcomes, that there is no effect due to scheduling format. In this study, older students performed significantly higher on a six-month follow-up test than younger students. Students who had previous, related course work scored significantly higher in final course grades than students with no prior course work, however, differences were moderated and no longer significant at the time of follow-up. Implications from these findings are discussed.Rebecca LaFountain is an assistant professor in the Department of Counseling, Shippenburg University of Pennsylvania. She earned an Ed.D in Counseling from the College of William and Mary, an M.S. in Counseling from Iowa State University, and a B.A. in French from Grand Valley State University. She is a Licensed Psychologist and a Certified Clinical Mental Health Counselor. Her primary professional interests include the teaching of research and statistics so that it is not threatening; Adlerian psychology; and, Solution-Focused counseling. 相似文献
46.
47.
Annie Nickum Emily Johnson-Barlow Rebecca Raszewski Ryan Rafferty 《Journal of the Medical Library Association》2022,110(3):358
Objective:Point-of-care tools (PoCTs) provide evidence-based information on patient care and procedures at the time of need. Registered nurses have unique practice needs, and many PoCTs are marketed to support their practice. However, there is little reported evidence in the literature about evaluating nursing-focused PoCTsCase Presentation:The investigators developed a rubric containing evaluation criteria based on content, coverage of nursing topics, transparency of the evidence, user perception, and customization of PoCTs for supporting nursing practice. The investigators selected five PoCTs cited in the literature and of interest to local nursing leadership: ClinicalKey for Nursing, DynaMed, Lippincott''s Advisor and Procedures, Nursing Reference Center Plus, and UpToDate. Application of the rubric found Lippincott had the highest coverage of diagnoses, while ClinicalKey for Nursing had strong content focused on interventions and outcomes. Nursing Reference Center Plus provided the most well-rounded coverage of nursing terminology and topics. DynaMed and UpToDate were more transparent with indicating conflict of interest, but both had lower coverage of nursing terminology, content, and care processes.Conclusion:None of the five PoCTs strongly met all of the evaluated criteria. The rubric developed for this study highlights each PoCT''s strengths and weaknesses that can then be used to inform the decision-making process based on priorities and budget. The investigators recommend licensing a nursing PoCT and a PoCT like DynaMed or UpToDate to provide comprehensive, evidence-based, patient care coverage and to meet the diverse information needs of nurses. 相似文献
48.
49.
50.