全文获取类型
收费全文 | 71192篇 |
免费 | 7544篇 |
国内免费 | 5131篇 |
专业分类
耳鼻咽喉 | 804篇 |
儿科学 | 900篇 |
妇产科学 | 786篇 |
基础医学 | 6883篇 |
口腔科学 | 1484篇 |
临床医学 | 8978篇 |
内科学 | 9039篇 |
皮肤病学 | 605篇 |
神经病学 | 2949篇 |
特种医学 | 2658篇 |
外国民族医学 | 29篇 |
外科学 | 6913篇 |
综合类 | 15690篇 |
现状与发展 | 18篇 |
一般理论 | 3篇 |
预防医学 | 5808篇 |
眼科学 | 1531篇 |
药学 | 8426篇 |
103篇 | |
中国医学 | 5261篇 |
肿瘤学 | 4999篇 |
出版年
2024年 | 355篇 |
2023年 | 1312篇 |
2022年 | 3207篇 |
2021年 | 4053篇 |
2020年 | 3150篇 |
2019年 | 2300篇 |
2018年 | 2367篇 |
2017年 | 2353篇 |
2016年 | 2170篇 |
2015年 | 3460篇 |
2014年 | 4228篇 |
2013年 | 4211篇 |
2012年 | 6043篇 |
2011年 | 6323篇 |
2010年 | 4836篇 |
2009年 | 4019篇 |
2008年 | 4359篇 |
2007年 | 4313篇 |
2006年 | 3948篇 |
2005年 | 3334篇 |
2004年 | 2552篇 |
2003年 | 2314篇 |
2002年 | 2004篇 |
2001年 | 1569篇 |
2000年 | 1179篇 |
1999年 | 883篇 |
1998年 | 502篇 |
1997年 | 508篇 |
1996年 | 379篇 |
1995年 | 316篇 |
1994年 | 276篇 |
1993年 | 160篇 |
1992年 | 168篇 |
1991年 | 143篇 |
1990年 | 153篇 |
1989年 | 111篇 |
1988年 | 79篇 |
1987年 | 73篇 |
1986年 | 69篇 |
1985年 | 32篇 |
1984年 | 24篇 |
1983年 | 14篇 |
1982年 | 6篇 |
1981年 | 5篇 |
1980年 | 2篇 |
1979年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Guoliang Zhang & Tao Xiong 《Communications In Computational Physics》2022,32(1):126-155
We propose a high order finite difference linear scheme combined with a
high order bound preserving maximum-principle-preserving (MPP) flux limiter to
solve the incompressible flow system. For such problem with highly oscillatory structure but not strong shocks, our approach seems to be less dissipative and much less
costly than a WENO type scheme, and has high resolution due to a Hermite reconstruction. Spurious numerical oscillations can be controlled by the weak MPP flux
limiter. Numerical tests are performed for the Vlasov-Poisson system, the 2D guiding-center model and the incompressible Euler system. The comparison between the linear
and WENO type schemes, with and without the MPP flux limiter, will demonstrate the
good performance of our proposed approach. 相似文献
3.
4.
5.
Sophocarpine attenuates toll‐like receptor 4 in steatotic hepatocytes to suppress pro‐inflammatory cytokines synthesis 下载免费PDF全文
6.
7.
8.
Shengxuan Cao Chen Wang Xin Ma Xu Wang Jiazhang Huang Chao Zhang Li Chen Xiang Geng Kan Wang 《Journal of orthopaedic research》2019,37(8):1860-1867
Patients with mechanic ankle instability experience increased tibiotalar and subtalar joint laxity. However, in vivo joint kinematics in functional ankle instability (FAI) patients and lateral ankle sprain (LAS) copers, especially during dynamic activities, are poorly understood. Ten FAI patients, 10 LAS copers, and 10 healthy controls were included in this study. A dual fluoroscopic imaging system was used to analyze the tibiotalar and subtalar joint kinematics during stair descent. Five key poses of stair descent were analyzed. Kinematic data from six degrees of freedom were calculated utilizing a solid modeling software. The range of motion and joint positions in each degree of freedom were compared among the three groups. The tibiotalar joints of FAI patients and LAS copers were significantly more inverted than those of healthy controls during the foot strike (p = 0.016, = 0.264). The subtalar joints of FAI patients were significantly more anteriorly translated (pose 2, p = 0.003, = 0.352; pose 3, p < 0.001, = 0.454; pose 4, p = 0.004, = 0.334), inverted (pose 4, p = 0.027, = 0.234; pose 5,p = 0.034, = 0.221), and externally rotated (pose 4, p = 0.037, = 0.217; pose 5; p = 0.004, = 0.331) than those of healthy controls during the mid‐stance and the heel off. The FAI patients showed excessive tibiotalar inversion and subtalar joint hypermobility during stair descent. Meanwhile, the LAS copers maintained subtalar joint stability, and only showed excessive tibiotalar inversion in foot strike. These data provide insight into the mechanisms behind the development of FAI after initial LAS. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:1860–1867, 2019 相似文献
9.
10.