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   3294篇
  免费   299篇
  国内免费   34篇
耳鼻咽喉   11篇
儿科学   28篇
妇产科学   21篇
基础医学   466篇
口腔科学   70篇
临床医学   518篇
内科学   320篇
皮肤病学   19篇
神经病学   129篇
特种医学   183篇
外科学   167篇
综合类   656篇
预防医学   553篇
眼科学   14篇
药学   274篇
中国医学   142篇
肿瘤学   56篇
  2024年   9篇
  2023年   82篇
  2022年   126篇
  2021年   219篇
  2020年   143篇
  2019年   218篇
  2018年   167篇
  2017年   124篇
  2016年   133篇
  2015年   173篇
  2014年   300篇
  2013年   260篇
  2012年   228篇
  2011年   231篇
  2010年   155篇
  2009年   167篇
  2008年   140篇
  2007年   113篇
  2006年   100篇
  2005年   71篇
  2004年   69篇
  2003年   58篇
  2002年   63篇
  2001年   35篇
  2000年   30篇
  1999年   16篇
  1998年   33篇
  1997年   13篇
  1996年   9篇
  1995年   9篇
  1994年   11篇
  1993年   17篇
  1992年   13篇
  1991年   6篇
  1990年   8篇
  1989年   4篇
  1987年   1篇
  1985年   9篇
  1984年   11篇
  1983年   6篇
  1982年   7篇
  1981年   8篇
  1980年   7篇
  1979年   5篇
  1978年   10篇
  1977年   2篇
  1976年   3篇
  1975年   1篇
  1974年   1篇
  1973年   2篇
排序方式: 共有3627条查询结果,搜索用时 15 毫秒
91.
Two studies assessed technology-aided programs to support performance of daily activities and selection/activation of music items with patients with moderate Alzheimer's disease. In Study I, four patients were presented with activity-related pictorial instructions via a computer fitted with inexpensive, commercial software. In Study II, four patients were (a) presented with different music options and (b) allowed to select and activate the preferred option via a microswitch response. Study I showed that each patient learned to perform the two activities available with percentages of correct responses exceeding 85 by the end of the intervention. Study II showed that all patients learned to choose and activate music options. Psychology students, employed in a social validation check, scored the patients’ behavior within the program better than their behavior in a control situation. The relevance and usability of simplified pictorial-instruction programs and music choice programs for patients with moderate Alzheimer's disease were discussed.  相似文献   
92.
It is still unknown to what extent overground walking with a WRE is equivalent to natural overground walking without a WRE. Hence, the interpretability of the 10-m (10MWT) and six-minute (6MWT) walk tests during overground walking with a WRE against reference values collected during natural overground walking without a WRE is challenging. This study aimed to 1) compare walking performance across three different overground walking conditions: natural walking without a WRE, walking with a WRE providing minimal assistance (active walking), and walking with a WRE proving complete assistance (passive walking) and 2) assess the association and the agreement between the 10MWT and the 6MWT during passive and active walking with a WRE. Seventeen healthy individuals who underwent basic locomotor training with a WRE performed the 10MWT (preferred and maximal speeds) and the 6MWT under the three conditions. For the 10MWT, the speed progressively and significantly decreased from natural walking without a WRE (preferred: 1.40 ± 0.18 m/s; maximal: 2.16 ± 0.19 m/s), to active walking with a WRE (preferred: 0.48 ± 0.10 m/s; maximal: 0.61 ± 0.14 m/s), and to passive walking with a WRE (preferred: 0.38 ± 0.09 m/s; maximal: 0.42 ± 0.10 m/s). For the 6MWT, total distances decreased from walking without a WRE (609 ± 53.9 m), to active walking with a WRE (196.6 ± 42.6 m), and to passive walking with a WRE (144.3 ± 33.3 m). The 10MWT and 6MWT provide distinct information and can’t be used interchangeably to document speed only during active walking with the WRE. Speed and distance drastically decrease during active and, even more so, passive walking with the WRE in comparison to walking without a WRE. Selection of walking tests should depend on the level of assistance provided by the WRE.  相似文献   
93.
94.
BackgroundCareToy is an intelligent system, inspired by baby gyms, aimed to provide an intensive, individualized, home-based and family-centred early intervention (EI) program.AimsA pilot study was carried out to explore the feasibility of CareToy intervention in preterm infants, aged 3–9 months of corrected age.MethodsTwenty low-risk preterm infants, without brain lesion or other clinical complications (14 allocated to CareToy intervention and 6 to Standard Care) were recruited. The Infant Motor Profile (IMP) was predefined as the primary outcome measure and Alberta Infant Motor Scale and Teller Acuity Cards as secondary measures. Moreover, 202 pre-programmed training scenarios were developed and instructions for the management of CareToy intervention were defined as general guidelines.Outcomes and resultsAll infants received 4 weeks of their allocated intervention and were evaluated with the selected tests before and immediately after the 4 weeks. The mean difference changes in IMP total score and Teller Acuity Cards over the intervention period were higher in the CareToy group than in the Standard Care group.Conclusions and implicationsCareToy seems a feasible device for providing EI. An adequately powered randomized clinical trial is warranted.  相似文献   
95.
The present study investigated adolescent video-game use prior to bedtime and subsequent sleep, working memory and sustained attention performance. Participants were 21 healthy, good-sleeping adolescents (16 male) aged between 15 and 20 years (M = 17.6 years, SD = 1.8). Time spent video-gaming and subsequent sleep was measured across one night in the sleep laboratory. There were significant correlations between time spent video-gaming and sleep and between video-gaming and sustained attention, but not working memory. Sleep duration, in turn, had a significant negative association with sustained attention performance. Mediation analyses revealed that the relationship between video-gaming and sustained attention was fully mediated by sleep duration. These results indicate that video-gaming affected the ability to sustain attention only in as much as it affected sleep. In order to minimise negative consequences of video-game playing, video-games should be used in moderation, avoiding use close to the sleep period, to obviate detriments to sleep and performance.  相似文献   
96.
97.
为了解医务人员对卫生技术评估的认知,采用现场问卷调查与访谈相结合的方法,对山西省三级综合类医院的医务人员进行调查,从卫生技术评估知晓度、接受培训的意愿、支持意愿、知识获取渠道、期待的职能等方面对结果进行分析,在此基础上指出存在的问题并提出发展建议。  相似文献   
98.
以中国知网、万方数据库和维普数据库为数据源,对我国近35年医学信息教育领域公开发表的研究论文进行检索和统计,分析文献增长规律、合著情况、高产作者、核心机构、高频关键词、重要期刊等方面,系统总结我国医学信息教育的发展历程,进而为医学信息教育的科学可持续发展提供参考。  相似文献   
99.
100.

Background

Like many patients with diabetes, Department of Veterans Affairs (VA) patients frequently fall short of self-management goals and experience multiple barriers to self-care. Health information technologies (HITs) may provide the tools that patients need to manage their illness under the direction of their primary care team.

Methods

We describe several ongoing projects focused on HIT resources for self-management in VA. VA researchers are developing HITs that seek to bolster a variety of potential avenues for self-management support, including patients′ relationships with other patients, connections with their informal care networks, and communication with their health care teams.

Results

Veterans Affairs HIT research projects are developing services that can address the needs of patients with multiple challenges to disease self-care, including multimorbidity, health literacy deficits, and limited treatment access. These services include patient-to-patient interactive voice response (IVR) calling systems, IVR assessments with feedback to informal caregivers, novel information supports for clinical pharmacists based on medication refill data, and enhanced pedometers.

Conclusion

Large health care systems such as the VA can play a critical role in developing HITs for diabetes self-care. To be truly effective, these efforts should include a continuum of studies: observational research to identify barriers to self-management, developmental studies (e.g., usability testing), efficacy trials, and implementation studies to evaluate utility in real-world settings. VA HIT researchers partner with operations to promote the dissemination of efficacious services, and such relationships will be critical to move HIT innovations into practice.  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