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   6328篇
  免费   447篇
  国内免费   20篇
耳鼻咽喉   122篇
儿科学   176篇
妇产科学   127篇
基础医学   905篇
口腔科学   440篇
临床医学   473篇
内科学   1320篇
皮肤病学   144篇
神经病学   471篇
特种医学   137篇
外科学   898篇
综合类   22篇
一般理论   2篇
预防医学   626篇
眼科学   207篇
药学   396篇
中国医学   47篇
肿瘤学   282篇
  2023年   37篇
  2022年   79篇
  2021年   194篇
  2020年   132篇
  2019年   166篇
  2018年   213篇
  2017年   157篇
  2016年   172篇
  2015年   198篇
  2014年   267篇
  2013年   320篇
  2012年   495篇
  2011年   467篇
  2010年   276篇
  2009年   202篇
  2008年   332篇
  2007年   326篇
  2006年   322篇
  2005年   295篇
  2004年   289篇
  2003年   284篇
  2002年   194篇
  2001年   139篇
  2000年   141篇
  1999年   126篇
  1998年   39篇
  1997年   30篇
  1996年   31篇
  1995年   38篇
  1994年   32篇
  1993年   26篇
  1992年   81篇
  1991年   70篇
  1990年   71篇
  1989年   49篇
  1988年   60篇
  1987年   58篇
  1986年   56篇
  1985年   53篇
  1984年   29篇
  1983年   20篇
  1982年   13篇
  1979年   24篇
  1975年   15篇
  1974年   14篇
  1973年   16篇
  1972年   15篇
  1970年   12篇
  1969年   16篇
  1968年   13篇
排序方式: 共有6795条查询结果,搜索用时 234 毫秒
91.
Febrile Neutropenia represents a medical emergency and the use of appropriate antimicrobial therapy is essential for a better outcome. Although being time-consuming, conventional cultures and antimicrobial susceptibility tests remain the golden standard practices for microbiology identification. Final reports are typically available within several days. Faster diagnostic tools, such as species identification trough Matrix Assisted Laser Desorption Ionization-Time of Flight (MALDI-TOF) and molecular techniques might help to shorten time to diagnostic and also guide definitive therapy in this scenario. Here we present a case in which the use of a diagnostic molecular workflow combining MALDI-TOF and real-time PCR for relevant genes codifying antibiotic resistant integrated with instant communication report, led to a tailored and more appropriate treatment in a patient presenting with febrile neutropenia.  相似文献   
92.
93.
94.
Objective: Describe the use of assistive technology to enhance communication opportunities for older adults.

Methods: A systematic review was conducted in two databases, PubMed and Web of Science, by using two different searches in each. The search was limited to original articles, in English language, including people aged 60 years and older that used any type of assistive technology for communication. The articles found in the initial search were filtered by title, abstracts and the remaining articles were fully read.

Results: Eighteen studies were included in this review after the reading of full-texts. Most of the studies included apparently healthy participants with communication limitations due to aging related changes and the others included people with some pathology that prevent them from normal communication.

Conclusion: Four categories of assistive technology were identified: assistive technology for people with speech problems; robot or videoconferencing systems; Information and Communication Technologies and, other types of assistive technology for communication, such as hearing aids and scrapbooks. Assistive technology for communication of older adults is not only used by people with disabilities that prevent them from usual communication. They are mostly for older adults without a pathological communication problem.  相似文献   

95.
96.
97.
98.
Vection is the illusion of self-motion in the absence of real physical movement. The aim of the present study was to analyze how multisensory inputs (visual and auditory) contribute to the perception of vection. Participants were seated in a stationary position in front of a large, curved projection display and were exposed to a virtual scene that constantly rotated around the yaw-axis, simulating a 360° rotation. The virtual scene contained either only visual, only auditory, or a combination of visual and auditory cues. Additionally, simulated rotation speed (90°/s vs. 60°/s) and the number of sound sources (1 vs. 3) were varied for all three stimulus conditions. All participants were exposed to every condition in a randomized order. Data specific to vection latency, vection strength, the severity of motion sickness (MS), and postural steadiness were collected. Results revealed reduced vection onset latencies and increased vection strength when auditory cues were added to the visual stimuli, whereas MS and postural steadiness were not affected by the presence of auditory cues. Half of the participants reported experiencing auditorily induced vection, although the sensation was rather weak and less robust than visually induced vection. Results demonstrate that the combination of visual and auditory cues can enhance the sensation of vection.  相似文献   
99.
100.
To perform a validation of the Geriatric Oral Health Assessment Index (GOHAI) for complete denture wearers and present a proposal for estimation of perceived oral health. This is a cross‐sectional study with non‐probabilistic sampling. A total of 211 subjects with a mean age of 62·5 (s.d. = 11·4) years participated, being 169 female. The GOHAI was applied in a personal interview. The construct/convergent/discriminant validity was tested using structural equation modelling. Confirmatory factor analysis was used to verify the fit of three proposals of the GOHAI: three‐factor, one‐factor and second‐order hierarchical models. The stability of the models was evaluated in independent samples. The three‐factor model presented an inadequate fit, and items 3, 4 and 9 were removed. The new structure presented an acceptable fit and strong invariance in independent samples. The convergent, discriminant validity and internal consistency were below adequate. The one‐factor model presented an adequate fit to the sample. Convergent validity was compromised. A strong invariance of the one‐factor model was observed. To calculate the overall scores of the GOHAI factors (three‐factor model) or of the oral health perception (one‐factor model), a matrix of regression weights for each item in the model was presented as a suggestion. We found an adequate fit of the both structures of the GOHAI for denture wearers, but the three‐factor structure was more parsimonious. We suggested considering the weights of the regression model to calculate the overall score of perceived oral health or of its factors in different samples.  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