全文获取类型
收费全文 | 4285篇 |
免费 | 297篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 43篇 |
儿科学 | 97篇 |
妇产科学 | 76篇 |
基础医学 | 617篇 |
口腔科学 | 122篇 |
临床医学 | 371篇 |
内科学 | 1026篇 |
皮肤病学 | 115篇 |
神经病学 | 444篇 |
特种医学 | 109篇 |
外科学 | 566篇 |
综合类 | 28篇 |
预防医学 | 349篇 |
眼科学 | 40篇 |
药学 | 272篇 |
中国医学 | 22篇 |
肿瘤学 | 289篇 |
出版年
2023年 | 18篇 |
2022年 | 35篇 |
2021年 | 102篇 |
2020年 | 63篇 |
2019年 | 100篇 |
2018年 | 114篇 |
2017年 | 81篇 |
2016年 | 91篇 |
2015年 | 104篇 |
2014年 | 117篇 |
2013年 | 186篇 |
2012年 | 218篇 |
2011年 | 257篇 |
2010年 | 175篇 |
2009年 | 117篇 |
2008年 | 213篇 |
2007年 | 227篇 |
2006年 | 216篇 |
2005年 | 245篇 |
2004年 | 222篇 |
2003年 | 156篇 |
2002年 | 175篇 |
2001年 | 142篇 |
2000年 | 177篇 |
1999年 | 156篇 |
1998年 | 37篇 |
1997年 | 40篇 |
1996年 | 33篇 |
1995年 | 30篇 |
1994年 | 17篇 |
1993年 | 23篇 |
1992年 | 77篇 |
1991年 | 69篇 |
1990年 | 62篇 |
1989年 | 48篇 |
1988年 | 44篇 |
1987年 | 50篇 |
1986年 | 47篇 |
1985年 | 39篇 |
1984年 | 28篇 |
1983年 | 22篇 |
1982年 | 15篇 |
1979年 | 26篇 |
1978年 | 13篇 |
1977年 | 15篇 |
1975年 | 12篇 |
1974年 | 15篇 |
1973年 | 14篇 |
1972年 | 12篇 |
1969年 | 14篇 |
排序方式: 共有4586条查询结果,搜索用时 9 毫秒
41.
Concepcin Martínez Lucia del Rio Agustín Portela Esteban Domingo Juan Ortín 《Virology》1983,130(2):539-545
The complete genetic information for the neuraminidase (NA) gene of influenza virus A/Bangkok/1/79 has been cloned by in vitro synthesis of dsDNA, insertion into pBR322 plasmid, and transformation of Escherichia coli. The nucleotide sequence of the NA gene has been determined by the Maxam and Gilbert method. It is 1466 nucleotides long and contains a single open reading frame with a coding capacity for 469 amino acids. When compared to the NA genes of the N2 strains A/Victoria/3/75, A/Udorn/72, A/NT/60/68, and A/RI/5-/57, 90% of the nucleotide positions and 87% of the amino acid positions remained invariant. Forty-two nucleotide changes and 14 amino acid changes accumulated in the period 1975-1979, but the general structure of the protein appeared to remain constant. 相似文献
42.
43.
A family with Becker type muscular dystrophy is described, in which two females were severely affected, giving the family tree the appearance of dominant inheritance. 相似文献
44.
45.
L. Moreno J. L. Sánchez S. Mañas J. D. Piñeiro J. J. Merino J. Sigut R. M. Aguilar J. I. Estévez R. Marichal 《Journal of medical systems》2001,25(3):177-194
The objective of our research is to develop computer-based tools to automate the clinical evaluation of the electroencephalogram (EEG) and visual evoked potentials (VEP). This paper describes a set of solutions to support all the aspects regarding the standard procedures of the diagnosis in neurophysiology, including: (1) acquisition and real-time processing and compression of EEG and VEP signals, (2) real-time brain mapping of spectral powers, (3) classifier design, (4) automatic detection of morphologies through supervised neural networks. (5) signal analysis through fuzzy modelling, and (6) a knowledge based approach to classifier design. 相似文献
46.
Haleh Tajadodi Aziz Khan Jos Francisco Gmez‐Aguilar Hasib Khan 《Optimal control applications & methods.》2021,42(1):96-109
In this paper, we study fractional‐order optimal control problems (FOCPs) involving the Atangana‐Baleanu fractional derivative. A computational method based on B‐spline polynomials and their operational matrix of Atangana‐Baleanu fractional integration is proposed for the numerical solution of this class of problems. With this numerical technique, the FOCPs are reduced to a system of equations which are solved for the unknown parameters with the help of Mathematica® software. Our results show the applicability and usefulness of the numerical technique. 相似文献
47.
Maurizio Iaria Carlo Pellegrino Elena Cremaschi Enzo Capocasale Raffaele Dalla Valle Paolo Del Rio Carmelo Puliatti 《Transplantation proceedings》2021,53(3):1055-1057
BackgroundLymphatic disorders (LDs) are the most common minor complications after kidney transplantation (KT), with an incidence rate between 0.6% and 33.9%, which appears to be related to both surgical and medical factors. LDs mostly resolve spontaneously, but occasionally a surgical approach may be required.Materials and MethodsWe report our experience with 7 KT recipients who developed persistent lymphorrhea (>150 mL/24 h) between October 2017 and March 2019. All cases were treated as outpatients with parietal fistulectomy (PF). The fibrotic aponeurotic-cutaneous tract was thoroughly excised, and the residual aponeurotic defect was closed by watertight suturing. Serial abdominal ultrasounds (US) were carried out after the procedure.ResultsA small perirenal graft lymphocele of <2 cm was detected by US in all patients after 48 to 72 hours, without any evidence of either vascular or ureteral compression. During the subsequent scheduled US follow-up, lymphoceles did not increase in size, and additional interventions were not needed. Neither superficial nor deep surgical-site infections were recorded in such patients.ConclusionsPF was found to be a safe and effective minimally invasive approach for persistent lymphorrhea after KT. It could be easily performed with local anesthesia in a day surgery setting and did not require patient hospitalization. 相似文献
48.
49.
50.
Santella Anthony J. Parish Carrigan Dan Rui Feaster Daniel J. Rodriguez Allan E. del Rio Carlos Armstrong Wendy S. Jacobs Petra Metsch Lisa R. 《Journal of community health》2021,46(3):557-564
Journal of Community Health - People living with HIV (PLWH) who use drugs experience worse health outcomes than their non-using counterparts. Little is known about how often they seek dental care... 相似文献