全文获取类型
收费全文 | 1336402篇 |
免费 | 114569篇 |
国内免费 | 6365篇 |
专业分类
耳鼻咽喉 | 16705篇 |
儿科学 | 43005篇 |
妇产科学 | 36554篇 |
基础医学 | 183622篇 |
口腔科学 | 36272篇 |
临床医学 | 120698篇 |
内科学 | 278521篇 |
皮肤病学 | 31886篇 |
神经病学 | 110491篇 |
特种医学 | 55533篇 |
外国民族医学 | 274篇 |
外科学 | 210335篇 |
综合类 | 31527篇 |
现状与发展 | 2篇 |
一般理论 | 414篇 |
预防医学 | 106624篇 |
眼科学 | 28085篇 |
药学 | 93712篇 |
5篇 | |
中国医学 | 2233篇 |
肿瘤学 | 70838篇 |
出版年
2018年 | 13373篇 |
2017年 | 10630篇 |
2016年 | 12794篇 |
2015年 | 14298篇 |
2014年 | 19945篇 |
2013年 | 29732篇 |
2012年 | 36233篇 |
2011年 | 38882篇 |
2010年 | 24368篇 |
2009年 | 23902篇 |
2008年 | 36359篇 |
2007年 | 38774篇 |
2006年 | 39898篇 |
2005年 | 38487篇 |
2004年 | 36724篇 |
2003年 | 35822篇 |
2002年 | 33838篇 |
2001年 | 66055篇 |
2000年 | 67919篇 |
1999年 | 56589篇 |
1998年 | 16726篇 |
1997年 | 15020篇 |
1996年 | 16018篇 |
1995年 | 16233篇 |
1994年 | 15099篇 |
1993年 | 14155篇 |
1992年 | 47099篇 |
1991年 | 45747篇 |
1990年 | 43971篇 |
1989年 | 41815篇 |
1988年 | 38759篇 |
1987年 | 38083篇 |
1986年 | 35859篇 |
1985年 | 34636篇 |
1984年 | 26359篇 |
1983年 | 22109篇 |
1982年 | 13848篇 |
1981年 | 12447篇 |
1980年 | 11718篇 |
1979年 | 23544篇 |
1978年 | 17072篇 |
1977年 | 14385篇 |
1976年 | 13182篇 |
1975年 | 13722篇 |
1974年 | 16093篇 |
1973年 | 15396篇 |
1972年 | 14173篇 |
1971年 | 13036篇 |
1970年 | 11880篇 |
1969年 | 11101篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
Nickel Allergy and Our Children's Health: A Review of Indexed Cases and a View of Future Prevention
下载免费PDF全文
![点击此处可从《Pediatric dermatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Sharon E. Jacob M.D. Alina Goldenberg M.D. M.A.S. Janice L. Pelletier M.D. Luz S. Fonacier M.D. Richard Usatine M.D. Nanette Silverberg M.D. 《Pediatric dermatology》2015,32(6):779-785
Nickel is the leading cause of allergic contact dermatitis (ACD) from early childhood through adolescence. Studies have shown that skin piercings and other nickel‐laden exposures can trigger the onset of nickel ACD in those who are susceptible. Nickel ACD causes a vast amount of cutaneous disease in children. Cases of nickel ACD in children have been reported in peer‐reviewed literature from 28 states. Common items that contain inciting nickel include jewelry, coins, zippers, belts, tools, toys, chair studs, cases for cell phones and tablets, and dental appliances. The diagnosis of nickel ACD has been routinely confirmed by patch testing in children older than 6 months suspected of ACD from nickel. Unlike in Europe, there are no mandatory restrictions legislated for nickel exposure in the United States. Denmark has demonstrated that regulation of the nickel content in metals can lower the risk of ACD and the associated health care–related costs that arise from excess nickel exposure. To further awareness, this article reviews the prominent role of nickel in pediatric skin disease in the United States. It discusses the need for a campaign by caretakers to reduce nickel‐related morbidity. Lastly, it promotes the model of European legislation as a successful intervention in the prevention of nickel ACD. 相似文献
152.
Ariella Nouriel M.D. Jonah Zisquit M.D. Alexander M. Helfand M.D. Shoshana Greenberger M.D. Ph.D. 《Pediatric dermatology》2015,32(6):e245-e248
A 3‐year‐old Arab boy with a history of hypoplastic left heart syndrome was referred to the pediatric dermatology clinic at Sheba Medical Center for evaluation of hypomelanosis, manifested by fair skin pigmentation and silvery‐grey hair, eyebrows, and eyelashes. The child had one older brother with similar hypopigmentation and another older brother who had died of congenital heart disease. The child had no history of neurologic deficits or immunodeficiency and no additional findings on clinical evaluation. 相似文献
153.
154.
155.
156.
157.
158.
159.
Altan Ahmed John A. Stauffer Jordan D. LeGout Justin Burns Kristopher Croome Ricardo Paz-Fumagalli Gregory Frey Beau Toskich 《Journal of gastrointestinal oncology.》2021,12(2):751
BackgroundNeoadjuvant yttrium-90 transarterial radioembolization (TARE) is increasingly being used as a strategy to facilitate resection of otherwise unresectable tumors due to its ability to generate both tumor response and remnant liver hypertrophy. Perioperative outcomes after the use of neoadjuvant lobar TARE remain underinvestigated.MethodsA single center retrospective review of patients who underwent lobar TARE prior to major hepatectomy for primary or metastatic liver cancer between 2007 and 2018 was conducted. Baseline demographics, radioembolization parameters, pre- and post-radioembolization volumetrics, intra-operative surgical data, adverse events, and post-operative outcomes were analyzed.ResultsTwenty-six patients underwent major hepatectomy after neoadjuvant lobar TARE. The mean age was 58.3 years (17–88 years). 62% of patients (n=16) had primary liver malignancies while the remainder had metastatic disease. Liver resection included right hepatectomy or trisegmentectomy, left or extended left hepatectomy, and sectorectomy/segmentectomy in 77% (n=20), 8% (n=2), and 15% (n=4) of patients, respectively. The mean length of stay was 8.3 days (range, 3–33 days) and there were no grade IV morbidities or 90-day mortalities. The incidence of post hepatectomy liver failure (PHLF) was 3.8% (n=1). The median time to progression after resection was 4.5 months (range, 3.3–10 months). Twenty-three percent (n=6) of patients had no recurrence. The median survival was 28.9 months (range, 16.9–46.8 months) from major hepatectomy and 37.6 months (range, 25.2–53.1 months) from TARE.ConclusionsMajor hepatectomy after neoadjuvant lobar radioembolization is safe with a low incidence of PHLF. 相似文献
160.
D. Panigrahy P. K. Sahu 《Australasian physical & engineering sciences in medicine / supported by the Australasian College of Physical Scientists in Medicine and the Australasian Association of Physical Sciences in Medicine》2016,39(3):783-795
Electrocardiogram (ECG) signal gives a lot of information on the physiology of heart. In reality, noise from various sources interfere with the ECG signal. To get the correct information on physiology of the heart, noise cancellation of the ECG signal is required. In this paper, the effectiveness of extended Kalman smoother (EKS) with the differential evolution (DE) technique for noise cancellation of the ECG signal is investigated. DE is used as an automatic parameter selection method for the selection of ten optimized components of the ECG signal, and those are used to create the ECG signal according to the real ECG signal. These parameters are used by the EKS for the development of the state equation and also for initialization of the parameters of EKS. EKS framework is used for denoising the ECG signal from the single channel. The effectiveness of proposed noise cancellation technique has been evaluated by adding white, colored Gaussian noise and real muscle artifact noise at different SNR to some visually clean ECG signals from the MIT-BIH arrhythmia database. The proposed noise cancellation technique of ECG signal shows better signal to noise ratio (SNR) improvement, lesser mean square error (MSE) and percent of distortion (PRD) compared to other well-known methods. 相似文献