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   12616篇
  免费   132篇
  国内免费   10篇
教育   8459篇
科学研究   1628篇
各国文化   140篇
体育   897篇
综合类   14篇
文化理论   107篇
信息传播   1513篇
  2020年   134篇
  2019年   204篇
  2018年   231篇
  2017年   292篇
  2016年   263篇
  2015年   183篇
  2014年   262篇
  2013年   2467篇
  2012年   228篇
  2011年   233篇
  2010年   193篇
  2009年   195篇
  2008年   238篇
  2007年   227篇
  2006年   207篇
  2005年   174篇
  2004年   173篇
  2003年   158篇
  2002年   144篇
  2001年   156篇
  2000年   187篇
  1999年   179篇
  1998年   106篇
  1997年   97篇
  1996年   113篇
  1995年   96篇
  1994年   113篇
  1993年   126篇
  1992年   168篇
  1991年   182篇
  1990年   193篇
  1989年   186篇
  1988年   153篇
  1987年   160篇
  1986年   177篇
  1985年   196篇
  1984年   190篇
  1983年   181篇
  1982年   145篇
  1981年   156篇
  1980年   130篇
  1979年   179篇
  1978年   179篇
  1977年   128篇
  1976年   124篇
  1975年   114篇
  1974年   100篇
  1973年   113篇
  1971年   97篇
  1970年   98篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
This Basic Journal List of forty-eight journal titles is intended as a selection guide for the librarian of the small hospital. It is based on a survey of physicians in Virginia who were asked to review journal titles contained in the 1967 edition of a list compiled by Mr. Alfred N. Brandon. The List is designed for the library in a hospital of from 100 to 300 beds and for the active clinician.  相似文献   
42.
Time series analysis was used to investigate the hypothesis that during acquisition of a motor skill, knowledge of results (KR) information is used to generate a stable internal referent about which response errors are randomly distributed. Sixteen subjects completed 50 acquisition trials of each of three movements whose spatial-temporal characteristics differed. Acquisition trials were either blocked, with each movement being presented in series, or randomized, with the presentation of movements occurring in random order. Analysis of movement time data indicated the contextual interference effect reported in previous studies was replicated in the present experiment. Time series analysis of the acquisition trial data revealed the majority of individual subject response patterns during blocked trials were best described by a model with a temporarily stationary, internal reference of the criterion and systematic, trial-to-trial variation of response errors. During random trial conditions, response patterns were usually best described by a "White-noise" model. This model predicts a permanently stationary, internal reference associated with randomly distributed response errors that are unaffected by KR information. These results are not consistent with previous work using time series analysis to describe motor behavior (Spray & Newell, 1986).  相似文献   
43.
EPIC is a service that provides keyword or subject access to the OCLC Online Union Catalog (OLUC). This capability increases the success rate for title location as well as the potential uses of the OLUC. The features of the EPIC system, application of these features to the OLUC, and specific uses in health sciences libraries are described in this article.  相似文献   
44.
45.
46.
47.
As a gatekeeper to medical literature and a critical link in the delivery of information to physicians, the librarian's role raises the issue of the librarian's professional liability. The paper suggests several ways in which liability may attach to the librarian or the librarian's employers. Although the librarian's personal risk is negligible, the physician's exposure due to ineffective library work is substantial since the courts have held that a physician must keep abreast of progress in his field. Librarians can also become associated with professional liability actions as part of a case against a physician or hospital through the legal doctrine of vicarious liability. The paper concludes by suggesting several proactive steps for health sciences librarians to pursue to insulate themselves from professional liability and to insulate physicians and institutions from vicarious liability.  相似文献   
48.
Governments worldwide are increasingly using Web-based business models to enhance their service delivery. Yet the concept of the business model is unexplored within the context of e-government. Drawing upon the literature on e-commerce, we develop a taxonomy for analyzing Web-based business models for e-government. Based on a systematic survey of 59 e-government Web sites in the Netherlands, our findings indicate that most of the Web sites use the content provider or direct-to-customer business models, while only a few are using novel business models. Overall, the concept of business model is appealing and useful in the public sector. Specifically it compliments research on Web site quality by analyzing and describing Web sites using atomic e-government business models and suggesting improvements by using combinations of business models.  相似文献   
49.
There is growing interest in the role of emotion when considering communication in the workplace. This work has most often considered workers in front-line service positions in investigations of emotional labor, and human service workers in investigations of empathy and emotional work. In this study, we consider processes of both emotional labor and emotional work in the financial planning profession. Financial planners occupy a role requiring ongoing relationships with clients, conversations about the often emotional topic of money, and a need to manage emotion in a variety of interaction contexts. Thus, from extant theory and literature regarding emotion and communication, we proposed research questions regarding the roles of emotional labor and emotional work in the financial planning profession. These questions were investigated in a web-based survey study of almost 300 professional financial planners and supporting interviews with 14 financial planners. Results indicate support for existing theory on emotional work, extensions to current research regarding emotional labor, and important implications for the role of emotion and communication in a range of professional service roles.  相似文献   
50.
We consider some issues of the development of the national information infrastructure in the field of innovation, including a national system of accounting for the results of scientific and technical activities (RSTA) and a national new-generation research computer network (NNGRCN). The current state of the national system of scientific and technical information and its resources for information support of innovation processes are analyzed. In the context of further development of the Commonwealth of Independent States (CIS), we propose a Conception of scientific and technical support for programs and projects of NIS member-states in the field of innovation, making it possible to incorporate the existing innovation-oriented information resources into a joint distributed integrated information system as well as to create new information resources and technologies.  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