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   2342078篇
  免费   183425篇
  国内免费   4498篇
耳鼻咽喉   31853篇
儿科学   78854篇
妇产科学   66610篇
基础医学   336068篇
口腔科学   68701篇
临床医学   209591篇
内科学   452675篇
皮肤病学   51492篇
神经病学   189007篇
特种医学   92147篇
外国民族医学   753篇
外科学   353153篇
综合类   57782篇
现状与发展   3篇
一般理论   893篇
预防医学   183419篇
眼科学   54100篇
药学   173936篇
  6篇
中国医学   4460篇
肿瘤学   124498篇
  2018年   22895篇
  2016年   20106篇
  2015年   23028篇
  2014年   31677篇
  2013年   48547篇
  2012年   64933篇
  2011年   68733篇
  2010年   40932篇
  2009年   38833篇
  2008年   65352篇
  2007年   69032篇
  2006年   70145篇
  2005年   67850篇
  2004年   66610篇
  2003年   63886篇
  2002年   62257篇
  2001年   107823篇
  2000年   111356篇
  1999年   94113篇
  1998年   26219篇
  1997年   23869篇
  1996年   23640篇
  1995年   23047篇
  1994年   21618篇
  1993年   20337篇
  1992年   77199篇
  1991年   75287篇
  1990年   74018篇
  1989年   71362篇
  1988年   65853篇
  1987年   65461篇
  1986年   61805篇
  1985年   59782篇
  1984年   44948篇
  1983年   38478篇
  1982年   22811篇
  1981年   20489篇
  1980年   19186篇
  1979年   42577篇
  1978年   29994篇
  1977年   25331篇
  1976年   23852篇
  1975年   25087篇
  1974年   30681篇
  1973年   29562篇
  1972年   27124篇
  1971年   25574篇
  1970年   23549篇
  1969年   22057篇
  1968年   20257篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
22.
23.
24.
25.
26.
27.
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia.  相似文献   
28.
29.
30.
To determine percent of patients without malignancy and ≤ 40 years of age with high cumulative radiation doses through recurrent CT exams and assess imaging appropriateness. From the cohort of patients who received cumulative effective dose (CED) of ≥ 100 mSv over a 5-year period, a sub-set was identified with non-malignant disease. The top 50 clinical indications leading to multiple CTs were determined. Clinical decision support (CDS) system scores were analyzed using a widely adopted standard of 1–3 (red) as “not usually appropriate,” 4–6 (yellow) “may or may not be appropriate,” and 7–9 (green) “usually appropriate.” Clinicians reviewed patient records to assess compliance with appropriate use criteria (AUC). 9.6% of patients in our series were with non-malignant conditions and 1.4% with age ≤ 40 years. CDS scores (rounded) were 2% red, 38% yellow, 27% green, and 33% unscored CTs. Clinical society guidelines for CT exams, wherever available, were followed in 87.5 to 100% of cases. AUCs were not available for several clinical indications as also referral guidelines for serial CT imaging. More than half of CT exams were unrelated to follow-up of a primary chronic disease. We are faced with a situation wherein patients in age ≤ 40 years require or are thought to require many CT exams over the course of a few years but the radiation risk creates concern. There is a fair number of conditions for which AUC are not available. Suggested solutions include development of CT scanners with lesser radiation dose and further development of appropriateness criteria.  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