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   1544448篇
  免费   124767篇
  国内免费   6798篇
耳鼻咽喉   19404篇
儿科学   49339篇
妇产科学   40897篇
基础医学   213675篇
口腔科学   41114篇
临床医学   137581篇
内科学   323673篇
皮肤病学   37406篇
神经病学   129007篇
特种医学   61593篇
外国民族医学   368篇
外科学   236115篇
综合类   32578篇
现状与发展   2篇
一般理论   469篇
预防医学   125806篇
眼科学   32259篇
药学   108625篇
  7篇
中国医学   2898篇
肿瘤学   83197篇
  2019年   12589篇
  2018年   20042篇
  2017年   15001篇
  2016年   17120篇
  2015年   19177篇
  2014年   25056篇
  2013年   37966篇
  2012年   50813篇
  2011年   53436篇
  2010年   31619篇
  2009年   29310篇
  2008年   48904篇
  2007年   52199篇
  2006年   52233篇
  2005年   50661篇
  2004年   48109篇
  2003年   46252篇
  2002年   43662篇
  2001年   70861篇
  2000年   72780篇
  1999年   60984篇
  1998年   17536篇
  1997年   15707篇
  1996年   16650篇
  1995年   16798篇
  1994年   15597篇
  1993年   14581篇
  1992年   49655篇
  1991年   48092篇
  1990年   46192篇
  1989年   43877篇
  1988年   40730篇
  1987年   39914篇
  1986年   37611篇
  1985年   36211篇
  1984年   27537篇
  1983年   23118篇
  1982年   14427篇
  1981年   12926篇
  1980年   12201篇
  1979年   24583篇
  1978年   17810篇
  1977年   15073篇
  1976年   13752篇
  1975年   14426篇
  1974年   16973篇
  1973年   16282篇
  1972年   15007篇
  1971年   13860篇
  1970年   12654篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
13.
14.
Purpose

This paper describes the design of a theory-informed pragmatic intervention for adolescent perinatal depression in primary care in Nigeria.

Methods

We conducted Focus Group Discussions (FGDs) among 17 adolescent mothers and 25 maternal health care providers with experience in the receipt and provision of care for perinatal depression. The Consolidated Framework for Implementation Research (CFIR) was used to systematically examine the barriers and facilitators affecting adolescent mothers' use of an existing intervention package for depression. The Theoretical Domain Framework (TDF) and the Capability, Opportunity, Motivation, Behaviour (COM-B) model were used to analyze the results of the data across the five CFIR domains.

Results

FGD analysis revealed that care providers lacked knowledge on approaches to engage young mothers in treatment. Young mothers had poor treatment engagement, low social support, and little interest in parenting. A main characteristic of the newly designed intervention is the inclusion of age-appropriate psychoeducation supported with weekly mobile phone calls, to address treatment engagement and parenting behaviours of young mothers. Also in the outer setting, low social support from relatives was addressed with education, “as need arises” phone calls, and the involvement of "neighborhood mothers”. In the inner settings, care providers’ behaviour is addressed with training to increase their capacity to engage young mothers in treatment.

Conclusion

A theory-based approach helped develop an age-appropriate intervention package targeting depression and parenting skills deficit among perinatal adolescents in primary maternal care and in which a pragmatic use of mobile phone was key.

  相似文献   
15.
16.
17.
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to...  相似文献   
18.
In this paper we present a coupled Finite Element Method – Boundary Element Method (FEM-BEM) approach for the solution of the free-boundary axi-symmetric plasma equilibrium problem. The proposed method, obtained from an improvement of the Hagenow-Lackner coupling method, allows to efficiently model the equilibrium problem in unbounded domains by discretizing only the plasma region; the external conductors can be modelled either as 2D or 3D models, according to the problem of interest. The paper explores different iterative methods for the solution of the nonlinear Grad-Shafranov equation, such as Picard, Newton-Raphson and Newton-Krylov, in order to provide a robust and reliable tool, able to handle large-scale problems (e.g. high resolution equilibria). This method has been implemented in the FRIDA code (FRee-boundary Integro-Differential Axisimmetric – https://github. om/matteobonotto/ FRIDA), together with a suitable Adaptive Integration Technique (AIT) for the computation of the source term. FRIDA has been successfully tested and validated against experimental data from RFX-mod device, and numerical equilibria of an ITER-like device.  相似文献   
19.
20.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  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