全文获取类型
收费全文 | 35321篇 |
免费 | 373篇 |
国内免费 | 30篇 |
专业分类
教育 | 25955篇 |
科学研究 | 3269篇 |
各国文化 | 215篇 |
体育 | 2177篇 |
综合类 | 34篇 |
文化理论 | 583篇 |
信息传播 | 3491篇 |
出版年
2022年 | 144篇 |
2021年 | 243篇 |
2020年 | 391篇 |
2019年 | 568篇 |
2018年 | 2849篇 |
2017年 | 2846篇 |
2016年 | 2289篇 |
2015年 | 580篇 |
2014年 | 729篇 |
2013年 | 4650篇 |
2012年 | 818篇 |
2011年 | 1391篇 |
2010年 | 1344篇 |
2009年 | 911篇 |
2008年 | 1193篇 |
2007年 | 1661篇 |
2006年 | 541篇 |
2005年 | 779篇 |
2004年 | 848篇 |
2003年 | 711篇 |
2002年 | 530篇 |
2001年 | 450篇 |
2000年 | 447篇 |
1999年 | 420篇 |
1998年 | 222篇 |
1997年 | 259篇 |
1996年 | 262篇 |
1995年 | 222篇 |
1994年 | 226篇 |
1993年 | 210篇 |
1992年 | 316篇 |
1991年 | 316篇 |
1990年 | 343篇 |
1989年 | 328篇 |
1988年 | 307篇 |
1987年 | 258篇 |
1986年 | 269篇 |
1985年 | 333篇 |
1984年 | 281篇 |
1983年 | 265篇 |
1982年 | 202篇 |
1981年 | 222篇 |
1980年 | 182篇 |
1979年 | 257篇 |
1978年 | 221篇 |
1977年 | 199篇 |
1976年 | 163篇 |
1975年 | 131篇 |
1974年 | 128篇 |
1973年 | 151篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
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
62.
63.
64.
Karyn Ogata Jones Bryan E. Denham Jeffrey K. Springston 《Journal of Applied Communication Research》2006,34(1):94-113
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
65.
66.
Danuta A. Nitecki 《Archival Science》2004,4(1-2):17-44
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
67.
Toyo Yoshizaki 《Publishing Research Quarterly》2004,19(4):31-36
Summary Now more than ever good translations are proving to be vitally important to fulfilling Shoichi Noma’s mission of advancing
good relationships between cultures. With the emergence of dozens of world-class Japanese writers, the translators of Japanese
literature have acquired a new significance and a new importance. No longer are they required to simply handle the language
like an exotic and precious commodity but they must prepare a writer’s work to compete with literature from around the globe
and let others understand the issues at their very heart of the Japanese people.
Indeed, the selection committee’s choice of Murakami’s Wind-Up Bird Chronicle is an apt example of how literature at its very best can span cultural divides to promote mutual understanding of very complicated
and important world issues. Written for Japanese to help them understand the devastation of war, it is a rare and timely book
that confronts Japan’s experience head on. Ironically, Noma’s idea that books are silent ambassadors, an idea born from agony
and defeat, so many years later is helping the world come together towards a unified vision of peace and understanding.
“Literature has been described as a means of exchange between the hearts of people. Literary translation, then, is the building
of bridges so that all peoples of the world can interact in this way.”
Ye Weiqu, Chinese Institute of Social Studies. 相似文献
68.
69.
Question classification systems play an important role in question answering systems and can be used in a wide range of other domains. The goal of question classification is to accurately assign labels to questions based on expected answer type. Most approaches in the past have relied on matching questions against hand-crafted rules. However, rules require laborious effort to create and often suffer from being too specific. Statistical question classification methods overcome these issues by employing machine learning techniques. We empirically show that a statistical approach is robust and achieves good performance on three diverse data sets with little or no hand tuning. Furthermore, we examine the role different syntactic and semantic features have on performance. We find that semantic features tend to increase performance more than purely syntactic features. Finally, we analyze common causes of misclassification error and provide insight into ways they may be overcome. 相似文献
70.
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