首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   30340篇
  免费   409篇
  国内免费   38篇
教育   21496篇
科学研究   3021篇
各国文化   256篇
体育   2233篇
综合类   38篇
文化理论   239篇
信息传播   3504篇
  2022年   189篇
  2021年   334篇
  2020年   501篇
  2019年   685篇
  2018年   999篇
  2017年   1027篇
  2016年   964篇
  2015年   583篇
  2014年   847篇
  2013年   5575篇
  2012年   753篇
  2011年   859篇
  2010年   662篇
  2009年   635篇
  2008年   732篇
  2007年   659篇
  2006年   598篇
  2005年   527篇
  2004年   507篇
  2003年   441篇
  2002年   496篇
  2001年   574篇
  2000年   563篇
  1999年   540篇
  1998年   297篇
  1997年   342篇
  1996年   352篇
  1995年   279篇
  1994年   292篇
  1993年   257篇
  1992年   441篇
  1991年   400篇
  1990年   420篇
  1989年   429篇
  1988年   399篇
  1987年   324篇
  1986年   341篇
  1985年   411篇
  1984年   336篇
  1983年   338篇
  1982年   253篇
  1981年   265篇
  1980年   233篇
  1979年   328篇
  1978年   276篇
  1977年   247篇
  1976年   206篇
  1975年   174篇
  1974年   174篇
  1973年   195篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Indexing consistency in MEDLINE   总被引:3,自引:0,他引:3  
The quality of indexing of periodicals in a bibliographic data base cannot be measured directly, as there is no one "correct" way to index an item. However, consistency can be used to measure the reliability of indexing. To measure consistency in MEDLINE, 760 twice-indexed articles from 42 periodical issues were identified in the data base, and their indexing compared. Consistency, expressed as a percentage, was measured using Hooper's equation. Overall, checktags had the highest consistency. Medical Subject Headings (MeSH) and subheadings were applied more consistently to central concepts than to peripheral points. When subheadings were added to a main heading, consistency was lowered. "Floating" subheadings were more consistent than were attached subheadings. Indexing consistency was not affected by journal indexing priority, language, or length of the article. Terms from MeSH Tree Structure categories A, B, and D appeared more often than expected in the high-consistency articles; whereas terms from categories E, F, H, and N appeared more often than expected in the low-consistency articles. MEDLINE, with its excellent controlled vocabulary, exemplary quality control, and highly trained indexers, probably represents the state of the art in manually indexed data bases.  相似文献   
82.
83.
84.
85.
86.
87.
Drawing on components of agenda-setting theory and the two-step flow of information from mass media to news audiences, this study examines the effects of mass and interpersonal communication on breast cancer screening practices among college- and middle-aged women (n = 284). We theorized that screening behaviors among younger women would be influenced more by interpersonal sources of information while screening among middle-aged women would be more influenced by exposure to mass-mediated information. Findings supported anticipated patterns, revealing important and varying roles for both mass and interpersonal communication in the health behaviors of women. Implications for health practitioners and campaign planners, as well as recommendations for future research, are discussed.  相似文献   
88.
Evaluators of library programs have different perspectives on why to conduct an evaluation and also how to do so. The author suggests that a minimal approach to conducting a library program evaluation is to prove that the program exists. But this perspective has expanded to include different degrees of interest in the client and operations, culminating in a combined focus that leads evaluators to conduct outcome assessments. The chapter includes speculation on what motivates managers to undertake an evaluation, a review of some ways that library evaluations are conducted, and a discussion of several examples of program evaluations. Though there are not single directives for undertaking a library program evaluation, there are a variety of tools and advice to entice librarians to do more of them as a way to improve understanding the value of a library to its clientele and in society.  相似文献   
89.
This study investigates the current state of research methods education in Korean library and information science (LIS) programs and compares research methods education between Korea and the United States. The definition of research methods is consistent and homogeneous across Korean schools, whereas research methods are defined loosely and differently in the United States. Research methods in both the United States and in Korea appear to be in a state of methodological uncertainty where dominant methods may be taught but not necessarily applied by graduate students. Research methods, as shared knowledge, offer fields the tools needed to investigate problems and understand the process by which they are studied. Thus, if LIS wants to increase its research capacity and improve its research quality, then it will need to require research methods of all students. While the range of topics covered in Korean research methods courses may need to be expanded, those in the United States may need greater depth of coverage.  相似文献   
90.
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   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号