全文获取类型
收费全文 | 2802篇 |
免费 | 203篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 54篇 |
妇产科学 | 83篇 |
基础医学 | 428篇 |
口腔科学 | 30篇 |
临床医学 | 305篇 |
内科学 | 719篇 |
皮肤病学 | 63篇 |
神经病学 | 318篇 |
特种医学 | 31篇 |
外科学 | 179篇 |
综合类 | 5篇 |
一般理论 | 1篇 |
预防医学 | 276篇 |
眼科学 | 47篇 |
药学 | 212篇 |
中国医学 | 10篇 |
肿瘤学 | 241篇 |
出版年
2024年 | 5篇 |
2023年 | 28篇 |
2022年 | 110篇 |
2021年 | 120篇 |
2020年 | 77篇 |
2019年 | 92篇 |
2018年 | 83篇 |
2017年 | 80篇 |
2016年 | 68篇 |
2015年 | 85篇 |
2014年 | 132篇 |
2013年 | 136篇 |
2012年 | 204篇 |
2011年 | 225篇 |
2010年 | 93篇 |
2009年 | 111篇 |
2008年 | 137篇 |
2007年 | 162篇 |
2006年 | 145篇 |
2005年 | 148篇 |
2004年 | 140篇 |
2003年 | 148篇 |
2002年 | 134篇 |
2001年 | 30篇 |
2000年 | 39篇 |
1999年 | 29篇 |
1998年 | 29篇 |
1997年 | 18篇 |
1996年 | 11篇 |
1995年 | 18篇 |
1994年 | 11篇 |
1993年 | 7篇 |
1992年 | 13篇 |
1991年 | 19篇 |
1990年 | 13篇 |
1989年 | 17篇 |
1988年 | 5篇 |
1987年 | 13篇 |
1986年 | 5篇 |
1985年 | 8篇 |
1984年 | 4篇 |
1982年 | 14篇 |
1981年 | 4篇 |
1980年 | 9篇 |
1979年 | 5篇 |
1977年 | 3篇 |
1975年 | 4篇 |
1974年 | 7篇 |
1972年 | 4篇 |
1966年 | 6篇 |
排序方式: 共有3022条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
Cristina Tassorelli Francesca Mancini Laura Balloni Claudio Pacchetti Giorgio Sandrini Giuseppe Nappi Emilia Martignoni 《Movement disorders》2006,21(12):2240-2243
Currently, the best treatment option for idiopathic cervical dystonia (ICD) is injection of botulinum toxin (BTX) into the affected muscles, whereas rehabilitative approaches have given disappointing results. We evaluated whether the association of an ad hoc rehabilitative program may improve the clinical efficacy of BTX treatment in a single-center, cross-over, controlled study. Forty patients with ICD were randomly assigned to two different treatment groups: (1) BTX type A (BTX-A) plus a specific program of physical therapy (BTX-PT) or (2) BTX-A alone (BTX-0). Patients in the BTX-PT group showed a longer duration of the clinical benefit (118.8 vs. 99.1 days) and needed a lower dose of BTX at reinjection (284.5 vs. 325.5 units). In addition, they showed more marked reductions in their disability in activities of daily living (-9.7 vs. -4.85 points) and subjective pain (-13.35 vs. 6.95 points) scores. Association of BTX-A therapy with a specific program of physical therapy may improve ICD treatment outcome. 相似文献
7.
8.
Modulatory effect of prolactin on the resting and mitogen-induced activity of T, B, and NK lymphocytes 总被引:4,自引:0,他引:4
Lina Matera Alessandra Cesano Graziella Bellone Emanuela Oberholtzer 《Brain, behavior, and immunity》1992,6(4):409-417
Prolactin (PRL) has been shown to contribute to the development of lymphoid tissues and maintenance of physiological immune function. Here we show that the role of the hormone extends to the control of the effector phase of the immune response. In addition to triggering resting lymphocytes to cell division, the hormone can also control the magnitude of their response to polyclonal stimuli. Concentrations of PRL in the physiological range increased the [3H]thymidine, [3H]uridine, and [3H]leucine incorporation of unstimulated NK cells cultured in serum-free conditions. The same concentrations of the hormone increased the response of NK, T, and B cells to the mitogenic stimuli interleukin 2 (IL2), phytohemagglutinin (PHA), and staphylococcus aureus cowan, respectively, the effect being maximally evident in the presence of suboptimal concentrations of the mitogens. By contrast concentrations of PRL five- to tenfold the physiological levels inhibited the mitogenic response to IL2 and PHA. These data indicate a double-faceted regulatory role of this hormone in vivo. 相似文献
9.
Support vector machines (SVMs) are a powerful technique developed in the last decade to effectively tackle classification and regression problems. In this paper we describe how support vector machines and artificial neural networks can be integrated in order to classify objects correctly. This technique has been successfully applied to the problem of determining the quality of tiles. Using an optical reader system, some features are automatically extracted, then a subset of the features is determined and the tiles are classified based on this subset. 相似文献
10.