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   27204篇
  免费   2837篇
  国内免费   689篇
耳鼻咽喉   273篇
儿科学   345篇
妇产科学   293篇
基础医学   2207篇
口腔科学   2561篇
临床医学   5907篇
内科学   2945篇
皮肤病学   101篇
神经病学   1720篇
特种医学   1723篇
外科学   2920篇
综合类   3928篇
现状与发展   1篇
一般理论   3篇
预防医学   2888篇
眼科学   260篇
药学   1210篇
  256篇
中国医学   933篇
肿瘤学   256篇
  2024年   129篇
  2023年   671篇
  2022年   1533篇
  2021年   1999篇
  2020年   1708篇
  2019年   1251篇
  2018年   1192篇
  2017年   1214篇
  2016年   1069篇
  2015年   1115篇
  2014年   2198篇
  2013年   2502篇
  2012年   1656篇
  2011年   1736篇
  2010年   1372篇
  2009年   1230篇
  2008年   1190篇
  2007年   1055篇
  2006年   860篇
  2005年   723篇
  2004年   582篇
  2003年   536篇
  2002年   423篇
  2001年   368篇
  2000年   273篇
  1999年   238篇
  1998年   199篇
  1997年   187篇
  1996年   191篇
  1995年   149篇
  1994年   129篇
  1993年   112篇
  1992年   133篇
  1991年   83篇
  1990年   81篇
  1989年   63篇
  1988年   68篇
  1987年   57篇
  1986年   47篇
  1985年   50篇
  1984年   69篇
  1983年   39篇
  1982年   35篇
  1981年   34篇
  1980年   31篇
  1979年   23篇
  1978年   28篇
  1977年   21篇
  1976年   19篇
  1975年   16篇
排序方式: 共有10000条查询结果,搜索用时 203 毫秒
1.
2.
3.
Monitoring variations in the functioning of the autonomic nervous system may help personalize training of runners and provide more pronounced physiological adaptations and performance improvements. We systematically reviewed the scientific literature comparing physiological adaptations and/or improvements in performance following training based on responses of the autonomic nervous system (ie, changes in heart rate variability) and predefined training. PubMed, SPORTDiscus, and Web of Science were searched systematically in July 2019. Keywords related to endurance, running, autonomic nervous system, and training. Studies were included if they (a) involved interventions consisting predominantly of running training; (b) lasted at least 3 weeks; (c) reported pre- and post-intervention assessment of running performance and/or physiological parameters; (d) included an experimental group performing training adjusted continuously on the basis of alterations in HRV and a control group; and (e) involved healthy runners. Five studies involving six interventions and 166 participants fulfilled our inclusion criteria. Four HRV-based interventions reduced the amount of moderate- and/or high-intensity training significantly. In five interventions, improvements in performance parameters (3000 m, 5000 m, Loadmax, Tlim) were more pronounced following HRV-based training. Peak oxygen uptake () and submaximal running parameters (eg, LT1, LT2) improved following both HRV-based and predefined training, with no clear difference in the extent of improvement in . Submaximal running parameters tended to improve more following HRV-based training. Research findings to date have been limited and inconsistent. Both HRV-based and predefined training improve running performance and certain submaximal physiological adaptations, with effects of the former training tending to be greater.  相似文献   
4.
《Surgery (Oxford)》2020,38(10):596-600
Improving Surgical Training is a programme piloting an innovative, evidence-based approach to training. It was developed in response to the Shape of Training report which reviewed postgraduate training and recommended changes in medical education to meet the demands of the modern NHS. A series of initiatives have been developed to enhance the experience for surgical trainees not only to encourage a more focussed and supported method, but also to improve their job satisfaction. The initiatives have combined a greater emphasis on time for training provided by trainers with allocated time for training with multidisciplinary teamworking and the use of technology enhanced learning with simulation of both technical and non-technical skills. The pilot started in 2018 with core training in general surgery and has been expanded to include vascular surgery, urology and trauma and orthopaedics over the last 2 years. Initial feedback from both trainees, trainers and schools of surgery have identified different challenges to aid implementation. The programme is being very carefully evaluated by an independent company as well as careful oversight by the General Medical Council which are paramount to its success.  相似文献   
5.
6.
目的调查镇江市各医院护士分层培训及分层进阶的方法及现状。方法2018年4—5月间采用自行设计的调查问卷,对全市医院的护理人员进行随机抽样调查。结果调查显示镇江市96.45%的护士受医院分层培训及分层进阶这一模式的管理。其中N1占16.77%,N2占29.5%,N3占41.9%,N4占8.7%,其他占3.11%。有24.53%的护士对医院目前的分层培训方式感到满意并认为无需改进,40.99%的护士表示满意,但需要改进,29.19%的护士表示基本满意,需要改进,5.28%的护士表示不满意需要较大改进。95.82%的医院科室对不用层级的护士有不同的核心能力要求并根据不同核心能力要求进行培训。结论护士分层培训几分层进阶这一管理模式在镇江各医院都有体现,但各医院实行的方式有较大差异,配套的管理方式也有待完善。  相似文献   
7.
8.
9.
Core executive functions (EF) such as attention, and working memory have been strongly associated with academic achievement, language development and behavioral stability. In the case of children who are vulnerable to cognitive and learning problems because of an underlying intellectual disability, EF difficulties will likely exacerbate an already compromised cognitive system. The current review examines cognitive training programs that aim to improve EF, specifically focusing on the potential of this type of intervention for children who have intellectual disabilities. We conclude that despite considerable discrepancies regarding reported intervention effects, these inconsistencies can be attributed to flaws in both program and study design. We discuss the steps needed to address these limitations and to facilitate the advancement of non-pharmaceutical interventions for children with intellectual disabilities.  相似文献   
10.
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