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   46351篇
  免费   3479篇
  国内免费   800篇
耳鼻咽喉   151篇
儿科学   368篇
妇产科学   393篇
基础医学   2350篇
口腔科学   434篇
临床医学   6157篇
内科学   2537篇
皮肤病学   323篇
神经病学   670篇
特种医学   822篇
外科学   1840篇
综合类   12621篇
现状与发展   2篇
一般理论   39篇
预防医学   16693篇
眼科学   270篇
药学   2151篇
  308篇
中国医学   2016篇
肿瘤学   485篇
  2024年   143篇
  2023年   745篇
  2022年   1379篇
  2021年   1829篇
  2020年   2153篇
  2019年   1417篇
  2018年   1294篇
  2017年   1281篇
  2016年   1320篇
  2015年   1257篇
  2014年   3362篇
  2013年   3561篇
  2012年   3322篇
  2011年   3664篇
  2010年   3075篇
  2009年   2613篇
  2008年   2891篇
  2007年   2738篇
  2006年   2358篇
  2005年   1862篇
  2004年   1423篇
  2003年   1149篇
  2002年   840篇
  2001年   717篇
  2000年   611篇
  1999年   478篇
  1998年   393篇
  1997年   357篇
  1996年   306篇
  1995年   275篇
  1994年   193篇
  1993年   106篇
  1992年   103篇
  1991年   147篇
  1990年   125篇
  1989年   110篇
  1988年   108篇
  1987年   87篇
  1986年   107篇
  1985年   89篇
  1984年   91篇
  1983年   77篇
  1982年   82篇
  1981年   60篇
  1980年   67篇
  1979年   32篇
  1978年   55篇
  1977年   58篇
  1976年   57篇
  1975年   37篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
993.
994.
Currently there are no growth charts based on local norms available for infants in Iran, and their growth is assessed by the National Centre for Health Statistics (NCHS) reference data, which is misleading. Growth charts for a cohort of 317 infants (164 girls and 153 boys) born in Shiraz (Southern Iran) in 1996 and followed for 2 years from birth are presented. All the centiles of length and weight charts are slightly above those of the NCHS charts under the age of 6 months and fall substantially below those over the age of 6 months. However, the spread is similar, so there is no suggestion that the difference is due to the prevalence of gross malnutrition. The difference shows that the use of locally based growth charts are essential for assessing the growth of children in Iran. The representativeness of our data leads us to conclude that the charts presented here are likely to be applied to the urban infant population of Iran.

Gegenwärtig stehen im Iran für Kleinkinder keine auf lokalen Normdaten basierende Wachstumsdiagramme zur Verfügung. Das Wachstum dieser Kinder wird anhand der Referenzdaten des Nationalen Zentrums für Gesundheitsstatistik (NCHS) eingeschätzt, was zu Fehleinschätzungen führt. Es werden Wachstumsdiagramme für eine Kohorte von 317 Kleinkindern (164 Mädchen und 153 Jungen) vorgestellt, die 1996 in Shiraz (Südiran) geboren wurden und nach ihrer Geburt 2 Jahre lang untersucht wurden. Alle Längen- und Gewichtszentilen liegen bis zu einem Alter von unter 6 Monaten leicht über denjenigen der NCHS-Diagramme und fallen ab einem Alter von 6 Monaten beträchtlich unterhalb diese. Allerdings ist die Spannweite ähnlich und daher gibt es kein Anzeichen dafür, dass der Unterschied auf das Vorliegen einer schweren Unterernährung zurückzuführen ist. Die Unterschiede zeigen, dass die Verwendung von lokalen Wachstumsdiagrammen für die Einschätzung des Wachstums von Kindern im Iran notwendig ist. Die Tatsache, dass unsere Daten als repräsentativ anzusehen sind, veranlasst uns zu der Schlussfolgerung, dass die hier vorgestellten Charts wahrscheinlich für die städtische Kleinkinderpopulation im Iran anwendbar sind.

On ne dispose pas actuellement en Iran de tables normatives de la croissance établies sur des données locales, si bien que la croissance des enfants iraniens est inadéquatement observéeen référence aux données du National Centre for Health Statistics (NCHS). On présente ici des courbes de croissance établies à partir d'une cohorte de 317 enfants (164 filles et 153 garçons) nés à Shiraz (Iran méridional) en 1996 et suivis pendant leurs deux premières années. Tous les centiles de taille et de poids sont légèrement supérieurs à ceux des tables NCHS avant l'âge de six mois, puis leurs deviennent nettement inférieurs par la suite. L'évolution des courbes étant similaire, il n'y a donc pas raison de suspecter que la différence est due à de la malnutrition. Cet écart entre les deux tables montre que l'utilisation de courbes fondées sur des données locales est essentielle pour le suivi de la croissance des enfants en Iran. La représentativité de nos données nous conduit à estimer que les tables présentées dans ce travail sont applicables à la population infantile urbaine en Iran.  相似文献   
995.
Nowadays, the huge volume of medical images represents an enormous challenge towards health-care organizations, as it is often hard for clinicians and researchers to manage, access, and share the image database easily. Content-based medical image retrieval (CBMIR) techniques are employed to facilitate the above process. It is known that a few concrete factors, including visual attributes extracted from images, measures encoding the similarity between images, user interaction, etc. play important roles in determining the retrieval performance. This paper concentrates on the similarity learning problem of CBMIR. A novel similarity learning paradigm is proposed via relative comparison, and a large database composed of 5,000 images is utilized to evaluate the retrieval performance. Extensive experimental results and comprehensive statistical analysis demonstrate the superiority of adopting the newly introduced learning paradigm, compared with several conventional supervised and semi-supervised similarity learning methods, in the presented CBMIR application.  相似文献   
996.
Abstract

The paper provides an introduction to the National Institute for Health Research Devices for Dignity Healthcare Technology Co-operative. Embedded within the NHS, Devices for Dignity identifies areas of unmet clinical need and translates these into research and development projects to develop new medical technologies. It addresses the needs of people living with long-term conditions, helping them to live more dignified and independent lives. Through partnerships with patients, universities, the NHS and industry, Devices for Dignity has developed an innovation methodology for successful medical technology innovation.  相似文献   
997.
Abstract

This paper describes and discusses the role of unmet needs in the innovation of new medical technologies using the National Institute for Health Research Devices for Dignity (D4D) Healthcare Technology Co-operative as a case study. It defines an unmet need, providing a spectrum of classification and discusses the benefits and the challenges of identifying unmet need and its influence on the innovation process. The process by which D4D has captured and utilized unmet needs to drive technology innovation is discussed and examples given. It concludes by arguing that, despite the challenges, defining and reviewing unmet need is a fundamental factor in the success of medical technology innovation.  相似文献   
998.

Objective

Culture is known to impact expectations from medical treatments. The effects of cultural differences on attitudes toward Electronic Medical Records (EMR) have not been investigated. We compared the attitudes of Jewish and Bedouin responders toward EMR's use by family physicians during the medical encounter, and examined the contribution of background variables to these attitudes.

Methods

86 Jewish and 89 Bedouin visitors of patients in a regional Israeli University Medical Center responded to a self-reporting questionnaire with Hebrew and Arabic versions.

Results

T-tests and a linear regression analysis found that culture did not predict attitudes. Respondents’ self-reported health status, Internet and e-mail use, and estimates of their physician's typing speed explained a total of 18.6% of the variance in attitudes (p < 0.001).

Conclusion

Bedouins respondents’ attitudes toward EMR use were better than expected and similar to those of their Jewish counterparts. The most significant factor influencing respondents’ attitudes was the physician's typing speed.

Practice implications

(1) Further studies should consider the possible impact of cultural differences between the family physician and the healthcare client on attitudes. (2) Interventions to improve physicians’ skill in operating EMRs and typing will potentially have a positive impact on patients’ satisfaction with physicians’ EMR use.  相似文献   
999.

Objective

The objectives of this paper are to discuss the results of a workshop conducted at EACH 2012. Specifically, we will (1) examine the link between communication, clinical reasoning, and medical problem solving, (2) explore strategies for (a) integrating clinical reasoning, medical problem solving, and content from the broader curriculum into clinical communication teaching and (b) integrating communication into the broader curriculum, and (3) discuss benefits gained from such integration.

Methods

Salient features from the workshop were recorded and will be presented here, as well as a case example to illustrate important connections between clinical communication and clinical reasoning.

Results

Potential links between clinical communication, clinical reasoning, and medical problem solving as well as strategies to integrate clinical communication teaching and the broader curricula in human and veterinary medicine are enumerated.

Conclusion

Participants expressed enthusiasm and keen interest in integration of clinical communication teaching and clinical reasoning during this workshop, came to the idea of the interdependence of these skills easily, and embraced the rationale immediately.

Practice implications

Valuing the importance of communication as clinical skill and embracing the interdependence between communication and thought processes related to clinical reasoning and medical problem solving will be beneficial in teaching programs.  相似文献   
1000.

Objective

To evaluate a web-based self-management training for health professionals. Patients spend 99% of their time outside the healthcare system. Thus self-management support from health professionals is central to optimal care. Our objective was to teach health professionals the skills to provide this support.

Methods

Primary care residents and practicing providers enrolled in six groups. Each group received four web-based interactive training sessions derived from self-efficacy theory. Retrospective-pre/post assessed changes in self-management beliefs and confidence. Wilcoxon signed-rank tests with Bonferroni correction compared responses. Focus groups solicited qualitative feedback.

Results

Fifty-seven residents and providers across the United States enrolled. Residents demonstrated positive changes on all belief questions (P 0.001–0.012). Practicing providers had a non-significant positive change on one and significant changes on the remainder (P 0.001–0.018). Both types of participants demonstrated significant increases on confidence questions regarding their ability to support self-management (P < 0.01 for all). Participants described learned techniques as being useful, reducing burnout, and increasing acceptance of patient involvement in care planning.

Conclusion

The web-based self-management support training for health professionals was feasible and changed beliefs and confidence.

Practice implications

The program may maximize patient self-management by increasing provider self-efficacy and skill for self-management support.  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