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   98135篇
  免费   30368篇
  国内免费   1073篇
耳鼻咽喉   2430篇
儿科学   2713篇
妇产科学   2383篇
基础医学   2662篇
口腔科学   5053篇
临床医学   26347篇
内科学   24670篇
皮肤病学   3255篇
神经病学   12346篇
特种医学   3644篇
外科学   17938篇
综合类   160篇
现状与发展   40篇
一般理论   8篇
预防医学   13664篇
眼科学   2162篇
药学   1082篇
中国医学   8篇
肿瘤学   9011篇
  2024年   541篇
  2023年   5037篇
  2022年   1108篇
  2021年   2777篇
  2020年   5320篇
  2019年   2032篇
  2018年   6902篇
  2017年   7351篇
  2016年   7909篇
  2015年   8006篇
  2014年   10403篇
  2013年   12152篇
  2012年   3799篇
  2011年   3581篇
  2010年   6837篇
  2009年   9092篇
  2008年   3500篇
  2007年   2465篇
  2006年   3627篇
  2005年   2243篇
  2004年   1627篇
  2003年   1281篇
  2002年   1193篇
  2001年   1858篇
  2000年   1186篇
  1999年   1711篇
  1998年   2104篇
  1997年   1922篇
  1996年   1972篇
  1995年   1712篇
  1994年   1105篇
  1993年   930篇
  1992年   784篇
  1991年   664篇
  1990年   534篇
  1989年   534篇
  1988年   525篇
  1987年   399篇
  1986年   374篇
  1985年   317篇
  1984年   274篇
  1983年   315篇
  1982年   240篇
  1981年   208篇
  1980年   134篇
  1979年   89篇
  1978年   136篇
  1977年   129篇
  1976年   99篇
  1974年   89篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
54.
Breast elastography has been available for more than 15 years but is not widely incorporated into clinical practice. Many publications report extremely high accuracy for various breast elastographic techniques. However, results in the literature are extremely variable. This variability is most likely due to variations in technique, a relatively steep learning curve, and variability in methods between vendors. This article describes our protocol for performing breast elastography using both strain elastography and shear wave elastography, which produces high sensitivity and specificity. Additionally, we will describe the most commonly known false-positive and false-negative lesions as well as how to detect them.  相似文献   
55.
The midwifery art has emphasised the uniqueness of human beings throughout its Nordic history. The educated Nordic midwife has in the last decade celebrated several hundred years of memories. This article studies how the key ideas of the midwifery art and patterns of ideas become evident in the zeitgeist from the beginning of the 19th century to the millennium in the Nordic countries. The legacy and pattern of ideas of the art of midwifery are interpreted in relation to the texts of the selected historical sources and based on Ricoeur's phenomenological-hermeneutic approach to the text and further to the dedication of understanding and interpretation. The historical sources refer to unprinted primary sources from historical archives and printed secondary and tertiary sources. The patterns of ideas include a tripartite whole: the true cultivation of the head, the philosophy and aesthetics of the hand, the strength of the heart and the drive of calling. These ideas open for unique visions and attest to the evident in modern midwives. Today's midwives have academic training with examinations, and the education is based on scientific evidence. The midwife profession is authorised by the state and supervised by the authorities.  相似文献   
56.
Background  The data visualization literature asserts that the details of the optimal data display must be tailored to the specific task, the background of the user, and the characteristics of the data. The general organizing principle of a concept-oriented display is known to be useful for many tasks and data types. Objectives  In this project, we used general principles of data visualization and a co-design process to produce a clinical display tailored to a specific cognitive task, chosen from the anesthesia domain, but with clear generalizability to other clinical tasks. To support the work of the anesthesia-in-charge (AIC) our task was, for a given day, to depict the acuity level and complexity of each patient in the collection of those that will be operated on the following day. The AIC uses this information to optimally allocate anesthesia staff and providers across operating rooms. Methods  We used a co-design process to collaborate with participants who work in the AIC role. We conducted two in-depth interviews with AICs and engaged them in subsequent input on iterative design solutions. Results  Through a co-design process, we found (1) the need to carefully match the level of detail in the display to the level required by the clinical task, (2) the impedance caused by irrelevant information on the screen such as icons relevant only to other tasks, and (3) the desire for a specific but optional trajectory of increasingly detailed textual summaries. Conclusion  This study reports a real-world clinical informatics development project that engaged users as co-designers. Our process led to the user-preferred design of a single binary flag to identify the subset of patients needing further investigation, and then a trajectory of increasingly detailed, text-based abstractions for each patient that can be displayed when more information is needed.  相似文献   
57.
58.
59.
60.
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