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   4986篇
  免费   450篇
  国内免费   24篇
耳鼻咽喉   57篇
儿科学   137篇
妇产科学   87篇
基础医学   725篇
口腔科学   161篇
临床医学   652篇
内科学   922篇
皮肤病学   37篇
神经病学   371篇
特种医学   177篇
外科学   589篇
综合类   112篇
一般理论   3篇
预防医学   580篇
眼科学   103篇
药学   545篇
中国医学   4篇
肿瘤学   198篇
  2022年   27篇
  2021年   80篇
  2020年   72篇
  2019年   83篇
  2018年   92篇
  2017年   72篇
  2016年   75篇
  2015年   90篇
  2014年   111篇
  2013年   192篇
  2012年   237篇
  2011年   240篇
  2010年   135篇
  2009年   121篇
  2008年   205篇
  2007年   268篇
  2006年   214篇
  2005年   225篇
  2004年   216篇
  2003年   204篇
  2002年   205篇
  2001年   205篇
  2000年   205篇
  1999年   143篇
  1998年   67篇
  1997年   46篇
  1996年   68篇
  1995年   48篇
  1994年   51篇
  1993年   37篇
  1992年   124篇
  1991年   119篇
  1990年   107篇
  1989年   92篇
  1988年   100篇
  1987年   95篇
  1986年   75篇
  1985年   68篇
  1984年   43篇
  1983年   33篇
  1982年   28篇
  1981年   36篇
  1980年   27篇
  1979年   44篇
  1978年   33篇
  1977年   45篇
  1976年   35篇
  1973年   36篇
  1972年   39篇
  1969年   26篇
排序方式: 共有5460条查询结果,搜索用时 15 毫秒
1.
Journal of Digital Imaging - Scoliosis is a condition of abnormal lateral spinal curvature affecting an estimated 2 to 3% of the US population, or seven million people. The Cobb angle is the...  相似文献   
2.
Journal of Neurology - To investigate associations of social support to psychological well-being, cognition, and motor functioning in patients with multiple sclerosis (MS). Secondarily, we were...  相似文献   
3.
4.
HSS Journal ® - This article is a critical analysis of a study, “Minimally Manipulated Bone Marrow Concentrate Compared with Microfracture Treatment of Full-Thickness Chondral Defects: A...  相似文献   
5.
6.

Early childhood disruptive behaviors are common mental health problems among American youth, and if poorly-managed, pose costly psychological and societal burdens. Outcomes accountability systems in clinical practice are vital opportunities to optimize early intervention for common mental health problems; however, such systems seem rare. A scoping review was conducted to summarize the current availability of outcomes accountability systems in clinical programs addressing early childhood disruptive behaviors, particularly in the US. We used PsycINFO to identify peer-reviewed literature published in English from 2005 to 2021, from which we selected 23 publications from the US, UK, and Netherlands on outcomes accountability systems within clinical programs treating common childhood mental health problems. Only 3 out of 23 publications described outcomes accountability efforts specifically for early childhood problems. Within the 3 studies, only one UK-based study specifically targeted early childhood disruptive behaviors. We did not find publications specifically describing outcomes accountability efforts in US-based clinical programs to treat early childhood disruptive behaviors. There are multi-level challenges preventing changes to the prevalent US model of paying a fee for each unit of child mental healthcare, with little regard for patient outcomes. However, opportunities exist to improve US-based accountability efforts; from top-down expansion of financial incentives, accountability initiatives, and PDT evidence-based practices to an iterative, bottom-up development of meaningful outcomes measurement by providers. Greater adoption of outcomes monitoring in US clinical practice for common mental health problems can optimize management of early childhood disruptive behaviors and mitigate long-term societal and economic burdens.

  相似文献   
7.
ObjectivesTo characterize and compare the stability of cortical potentials evoked by deep brain stimulation (DBS) of the subthalamic nucleus (STN) across the naïve, parkinsonian, and pharmacologically treated parkinsonian states. To advance cortical potentials as possible biomarkers for DBS programming.Materials and MethodsSerial electrocorticographic (ECoG) recordings were made more than nine months from a single non-human primate instrumented with bilateral ECoG grids spanning anterior parietal to prefrontal cortex. Cortical evoked potentials (CEPs) were generated through time-lock averaging of the ECoG recordings to DBS pulses delivered unilaterally in the STN region using a chronically implanted, six-contact, scaled DBS lead. Recordings were made across the naïve followed by mild and moderate parkinsonian conditions achieved by staged injections of the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) neurotoxin. In addition to characterizing the spatial distribution and stability of the response within each state, changes in the amplitude and latency of CEP components as well as in the frequency content were examined in relation to parkinsonian severity and dopamine replacement.ResultsIn the naïve state, the STN DBS CEP presented as a multiphase response maximal over M1 cortex, with components attributable to physiological activity distinguishable from stimulus artifact as early as 0.45–0.75 msec poststimulation. When delivered using therapeutically effective parameters in the parkinsonian state, the CEP was highly stable across multiple recording sessions within each behavioral state. Across states, significant differences were present with respect to both the latency and amplitude of individual response components, with greater differences present for longer-latency components (all p < 0.05). Power spectral density analysis revealed a high-beta peak within the evoked response, with significant changes in power between disease states across multiple frequency bands.ConclusionsOur findings underscore the spatiotemporal specificity and relative stability of the DBS-CEP associated with different disease states and with therapeutic benefit. DBS-CEP may be a viable biomarker for therapeutic programming.  相似文献   
8.
ABSTRACT

Measuring the impact of care delivered at home for frail older people is a complex task given many confounding variables that may impact on the ability of service providers to identify the direct impact of their programs on their clients’ well-being and quality of life. The recent publication of the 2018 Wellness and Reablement Report Outcomes indicated that organizations lack formal processes to measure the impact of their programs on service users. There are therefore limited data exits on measuring outcomes and the performance of the ACCOM tool in the real world. Knowledge of a strong causal relationship between services provided and outcomes enables confidence in assuming the care provided was largely responsible for the outcome achieved. This paper will reflect on the experiences of one service provider in Brisbane, in implementing the Australian Community Care Outcomes Measurement (ACCOM) tool to measure and demonstrate the impact of their programs.  相似文献   
9.
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