全文获取类型
收费全文 | 2676篇 |
免费 | 140篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 17篇 |
儿科学 | 123篇 |
妇产科学 | 46篇 |
基础医学 | 273篇 |
口腔科学 | 47篇 |
临床医学 | 260篇 |
内科学 | 452篇 |
皮肤病学 | 73篇 |
神经病学 | 215篇 |
特种医学 | 123篇 |
外科学 | 554篇 |
综合类 | 122篇 |
预防医学 | 139篇 |
眼科学 | 42篇 |
药学 | 138篇 |
中国医学 | 12篇 |
肿瘤学 | 202篇 |
出版年
2024年 | 3篇 |
2023年 | 16篇 |
2022年 | 27篇 |
2021年 | 74篇 |
2020年 | 52篇 |
2019年 | 65篇 |
2018年 | 63篇 |
2017年 | 43篇 |
2016年 | 38篇 |
2015年 | 60篇 |
2014年 | 53篇 |
2013年 | 101篇 |
2012年 | 143篇 |
2011年 | 161篇 |
2010年 | 92篇 |
2009年 | 90篇 |
2008年 | 130篇 |
2007年 | 162篇 |
2006年 | 149篇 |
2005年 | 152篇 |
2004年 | 137篇 |
2003年 | 127篇 |
2002年 | 104篇 |
2001年 | 110篇 |
2000年 | 82篇 |
1999年 | 81篇 |
1998年 | 40篇 |
1997年 | 35篇 |
1996年 | 30篇 |
1995年 | 26篇 |
1994年 | 18篇 |
1993年 | 11篇 |
1992年 | 57篇 |
1991年 | 45篇 |
1990年 | 38篇 |
1989年 | 45篇 |
1988年 | 27篇 |
1987年 | 24篇 |
1986年 | 27篇 |
1985年 | 19篇 |
1984年 | 16篇 |
1983年 | 8篇 |
1982年 | 6篇 |
1981年 | 4篇 |
1980年 | 9篇 |
1979年 | 11篇 |
1978年 | 8篇 |
1977年 | 4篇 |
1976年 | 3篇 |
1973年 | 3篇 |
排序方式: 共有2838条查询结果,搜索用时 15 毫秒
71.
ABSTRACTThis study investigated the relationships between different types of family resilience and various specific forms of family crisis. In recent decades, numerous studies have examined how people manage crisis and how resilience is developed to overcome periods of chaos and disruption. Most of these studies look only at individual cases, or focus on general concepts, theories, or fundamental frameworks addressing the basic interaction between resilience and crisis. This study uses the Family Adjustment and Adaptation Response model (Paterson, 1988) and the Family Strength Index (Orthner et al., 2003) to measure how family resilience relates to different kinds of family crisis. The results show that of the 6 types of family strength which comprise general family resilience, only economic, problem-solving, and family cohesion strength significantly predicted participants’ level of confidence in managing family crisis. Such a discrepancy from the findings of previous work may be explained by cultural factors, which are further discussed in this article. 相似文献
72.
Pegah Kharazmi Jiannan Zheng Harvey Lui Z. Jane Wang Tim K. Lee 《Journal of medical systems》2018,42(2):33
Vascular structures of skin are important biomarkers in diagnosis and assessment of cutaneous conditions. Presence and distribution of lesional vessels are associated with specific abnormalities. Therefore, detection and localization of cutaneous vessels provide critical information towards diagnosis and stage status of diseases. However, cutaneous vessels are highly variable in shape, size, color and architecture, which complicate the detection task. Considering the large variability of these structures, conventional vessel detection techniques lack the generalizability to detect different vessel types and require separate algorithms to be designed for each type. Furthermore, such techniques are highly dependent on precise hand-crafted features which are time-consuming and computationally inefficient. As a solution, we propose a data-driven feature learning framework based on stacked sparse auto-encoders (SSAE) for comprehensive detection of cutaneous vessels. Each training image is divided into small patches of either containing or non-containing vasculature. A multilayer SSAE is designed to learn hidden features of the data in hierarchical layers in an unsupervised manner. The high-level learned features are subsequently fed into a classifier which categorizes each patch into absence or presence of vasculature and localizes vessels within the lesion. Over a test set of 3095 patches derived from 200 images, the proposed framework demonstrated superior performance of 95.4% detection accuracy over a variety of vessel patterns; outperforming other techniques by achieving the highest positive predictive value of 94.7%. The proposed Computer-Aided Diagnosis (CAD) framework can serve as a decision support system assisting dermatologists for more accurate diagnosis, especially in teledermatology applications in remote areas. 相似文献
73.
74.
75.
The recognition that acute kidney injury (AKI) is a significant independent risk factor for morbidity and mortality has resulted in a substantial number of publications over the past 5 years or more. In no small part these have, to a degree, highlighted the inadequacy of conventional markers of renal insufficiency in the acute setting. Much effort has been invested in the identification of early, specific AKI markers in order to aid early diagnosis of AKI and hopefully improve outcome. The search for a 'biomarker' of AKI has seen early promise replaced by a degree of pessimism due to the lack of a clear candidate molecule and variability of results. We outline the major studies described to date as well as discuss potential reasons for the discrepancies observed and suggest that evolution of the field may result in success with ultimately an improvement in patient outcomes. 相似文献
76.
Tun Hing Lui 《The Journal of foot and ankle surgery》2012,51(6):813-815
Hypertrophy of the peroneal tubercle can be a source of discomfort when wearing shoes. Occasionally, it can cause tenosynovitis or a tear of the peroneal tendons. The symptoms can be successfully treated by complete resection of the tubercle, tenosynovectomy, and early range of motion exercises of the hindfoot joints. Traditionally, this is an open procedure. We report the technique of endoscopic resection of the peroneal tubercle. 相似文献
77.
78.
Kamyar Kalantar-Zadeh Philip Kam-Tao Li Ekamol Tantisattamo Latha Kumaraswami Vassilios Liakopoulos Siu-Fai Lui Ifeoma Ulasi Sharon Andreoli Alessandro Balducci Sophie Dupuis Tess Harris Anne Hradsky Richard Knight Sajay Kumar Maggie Ng Alice Poidevin Gamal Saadi Allison Tong 《Nefrología : publicación oficial de la Sociedad Espa?ola Nefrologia》2021,41(2):95-101
Living with chronic kidney disease (CKD) is associated with hardships for patients and their care-partners. Empowering patients and their care-partners, including family members or friends involved in their care, may help minimize the burden and consequences of CKD related symptoms to enable life participation. There is a need to broaden the focus on living well with kidney disease and re-engagement in life, including an emphasis on patients being in control. The World Kidney Day (WKD) Joint Steering Committee has declared 2021 the year of “Living Well with Kidney Disease” in an effort to increase education and awareness on the important goal of patient empowerment and life participation. This calls for the development and implementation of validated patient-reported outcome measures to assess and address areas of life participation in routine care. It could be supported by regulatory agencies as a metric for quality care or to support labelling claims for medicines and devices. Funding agencies could establish targeted calls for research that address the priorities of patients. Patients with kidney disease and their care-partners should feel supported to live well through concerted efforts by kidney care communities including during pandemics. In the overall wellness programme for kidney disease patients, the need for prevention should be reiterated. Early detection with a prolonged course of wellness despite kidney disease, after effective secondary and tertiary prevention programmes, should be promoted. WKD 2021 continues to call for increased awareness of the importance of preventive measures throughout populations, professionals, and policy makers, applicable to both developed and developing countries. 相似文献
79.
Is it feasible to identify preterm infants with respiratory distress syndrome for early extubation to continuous positive airway pressure post‐surfactant treatment during retrieval? 下载免费PDF全文