全文获取类型
收费全文 | 2355247篇 |
免费 | 191575篇 |
国内免费 | 29228篇 |
专业分类
耳鼻咽喉 | 27328篇 |
儿科学 | 73542篇 |
妇产科学 | 57025篇 |
基础医学 | 305593篇 |
口腔科学 | 60619篇 |
临床医学 | 231097篇 |
内科学 | 380569篇 |
皮肤病学 | 49534篇 |
神经病学 | 202145篇 |
特种医学 | 105632篇 |
外国民族医学 | 309篇 |
外科学 | 341423篇 |
综合类 | 115249篇 |
现状与发展 | 242篇 |
一般理论 | 1075篇 |
预防医学 | 188854篇 |
眼科学 | 45285篇 |
药学 | 188093篇 |
425篇 | |
中国医学 | 41024篇 |
肿瘤学 | 160987篇 |
出版年
2023年 | 57660篇 |
2022年 | 85870篇 |
2021年 | 113464篇 |
2020年 | 105236篇 |
2019年 | 86958篇 |
2018年 | 122912篇 |
2017年 | 110568篇 |
2016年 | 106710篇 |
2015年 | 110579篇 |
2014年 | 199919篇 |
2013年 | 229016篇 |
2012年 | 122638篇 |
2011年 | 108860篇 |
2010年 | 141154篇 |
2009年 | 118504篇 |
2008年 | 67335篇 |
2007年 | 68573篇 |
2006年 | 57131篇 |
2005年 | 51047篇 |
2004年 | 43571篇 |
2003年 | 37972篇 |
2002年 | 31800篇 |
2001年 | 32039篇 |
2000年 | 25910篇 |
1999年 | 25361篇 |
1998年 | 21811篇 |
1997年 | 18998篇 |
1996年 | 20943篇 |
1995年 | 19173篇 |
1994年 | 16534篇 |
1993年 | 14837篇 |
1992年 | 11943篇 |
1991年 | 10835篇 |
1990年 | 10765篇 |
1989年 | 10322篇 |
1988年 | 10917篇 |
1987年 | 10709篇 |
1986年 | 9993篇 |
1985年 | 11644篇 |
1984年 | 11622篇 |
1983年 | 8850篇 |
1982年 | 9424篇 |
1981年 | 8426篇 |
1980年 | 7565篇 |
1979年 | 7091篇 |
1978年 | 6124篇 |
1977年 | 5062篇 |
1976年 | 4609篇 |
1975年 | 4003篇 |
1974年 | 3580篇 |
排序方式: 共有10000条查询结果,搜索用时 171 毫秒
121.
122.
123.
Kienbaum Peter Schaefer Maximilian S. Weibel Stephanie Schlesinger Tobias Meybohm Patrick Eberhart Leopold H. Kranke Peter 《Der Anaesthesist》2022,71(2):123-128
Die Anaesthesiologie - Auch wenn f252;r An228;sthesiologen 252;ber Jahrzehnte die Prophylaxe und Therapie postoperativer Schmerzen im Rahmen des postoperativen Patientenkomforts an vorderster... 相似文献
124.
125.
We present an automated approach to detect and longitudinally track skin lesions on 3D total-body skin surface scans. The acquired 3D mesh of the subject is unwrapped to a 2D texture image, where a trained objected detection model, Faster R-CNN, localizes the lesions within the 2D domain. These detected skin lesions are mapped back to the 3D surface of the subject and, for subjects imaged multiple times, we construct a graph-based matching procedure to longitudinally track lesions that considers the anatomical correspondences among pairs of meshes and the geodesic proximity of corresponding lesions and the inter-lesion geodesic distances.We evaluated the proposed approach using 3DBodyTex, a publicly available dataset composed of 3D scans imaging the coloured skin (textured meshes) of 200 human subjects. We manually annotated locations that appeared to the human eye to contain a pigmented skin lesion as well as tracked a subset of lesions occurring on the same subject imaged in different poses. Our results, when compared to three human annotators, suggest that the trained Faster R-CNN detects lesions at a similar performance level as the human annotators. Our lesion tracking algorithm achieves an average matching accuracy of 88% on a set of detected corresponding pairs of prominent lesions of subjects imaged in different poses, and an average longitudinal accuracy of 71% when encompassing additional errors due to lesion detection. As there currently is no other large-scale publicly available dataset of 3D total-body skin lesions, we publicly release over 25,000 3DBodyTex manual annotations, which we hope will further research on total-body skin lesion analysis. 相似文献
126.
127.
《Health & place》2022
Whose values matter when considering which environment is healthier for a child whose guardianship is contested? The biological mother from a remote Australian Aboriginal community, who voluntarily relinquished her but has now requested her return? The foster mother who has cared for her in a metropolitan centre in another State of Australia, thousands of kilometres away? The welfare professionals who also live in that city? Or the child herself, who left her birth home and community five years earlier at the age of two? Drawing on a case study of a seven-year old Aboriginal girl, the authors argue that non-Indigenous values trumped Indigenous values without the realisation of key players who were empowered to make such determinations. The article uses Manuel DeLanda's neo-assemblage theory to consider the range of processes that exert themselves to shape place-values and social identity in colonised nations. It will also draw on Erik Erikson's and Lev Vygotsky's theories of psychosocial development to consider competing sets of values that raised feelings of dissonance within the child. Beliefs about what makes a place health-giving are revealed to be complex in colonised nations. Despite policy and legislative changes to better support Aboriginal people and their right to difference, non-Indigenous professionals can continue to be driven by an unrecognised systemic racism. While place-values are not, of course, the only (or perhaps even the most significant) consideration in guardianship determinations, this article will argue they can play a significant and covert role. 相似文献
128.
《The Canadian journal of cardiology》2022,38(4):454-464
Ventricular tachycardia (VT) is a potentially fatal cardiac rhythm disorder. Implantable cardioverter defibrillators (ICDs) are the primary management strategy for VT and have been shown to reduce the incidence of death but, ICDs do not reduce VT recurrences. Further, mounting evidence indicates that high VT burden, defined as the cumulative number of recurrent VTs or ICD shocks, is associated with an elevated risk of death; however, it is unclear if high VT burden is a cause of death or a marker of severe heart disease. Proposed mechanisms for a causal pathway suggest that multiple VT episodes or potential deleterious effects from ICDs might alter the myocardium of the ventricles to induce worsening heart disease, which might translate to an increased risk of mortality. In this review, we present the evidence to support association and causation hypotheses for the relationship between VT burden and risk of mortality and indicate potential gaps in evidence. Overall, there is insufficient evidence to prove causal hypotheses for the relationship between VT burden and mortality. Consistent definitions for VT burden, randomized controlled trials that assess the relationship between VT burden and mortality, and observational studies that capture VT burden are warranted to investigate if a potential causal relationship exists. 相似文献
129.
130.