全文获取类型
收费全文 | 507篇 |
免费 | 12篇 |
专业分类
化学 | 204篇 |
力学 | 9篇 |
数学 | 74篇 |
物理学 | 232篇 |
出版年
2020年 | 5篇 |
2018年 | 5篇 |
2017年 | 7篇 |
2016年 | 7篇 |
2015年 | 8篇 |
2014年 | 7篇 |
2013年 | 22篇 |
2012年 | 21篇 |
2011年 | 15篇 |
2010年 | 9篇 |
2009年 | 12篇 |
2008年 | 17篇 |
2007年 | 21篇 |
2006年 | 12篇 |
2005年 | 26篇 |
2004年 | 14篇 |
2003年 | 14篇 |
2002年 | 17篇 |
2001年 | 11篇 |
2000年 | 10篇 |
1999年 | 6篇 |
1996年 | 10篇 |
1995年 | 9篇 |
1994年 | 22篇 |
1993年 | 19篇 |
1992年 | 12篇 |
1991年 | 7篇 |
1990年 | 5篇 |
1989年 | 7篇 |
1988年 | 5篇 |
1987年 | 3篇 |
1986年 | 5篇 |
1985年 | 4篇 |
1984年 | 3篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1981年 | 7篇 |
1979年 | 6篇 |
1978年 | 10篇 |
1977年 | 10篇 |
1976年 | 6篇 |
1975年 | 8篇 |
1974年 | 8篇 |
1973年 | 5篇 |
1972年 | 5篇 |
1971年 | 4篇 |
1967年 | 6篇 |
1932年 | 3篇 |
1928年 | 3篇 |
1916年 | 4篇 |
排序方式: 共有519条查询结果,搜索用时 31 毫秒
41.
Homes CC McConnell AW Clayman BP Bonn DA Liang R Hardy WN Inoue M Negishi H Fournier P Greene RL 《Physical review letters》2000,84(23):5391-5394
In good conductors optical phonons are usually screened, and therefore not observed. However, sharp features due to infrared-active modes in the copper-oxygen planes are observed in the optical conductivity of Pr1.85Ce0.15CuO4 and YBa2Cu3O6.95. Oscillator strengths indicate that the screening of these modes is poor or totally absent. These materials are compared with eta-Mo4O11, in which lattice modes appear suddenly below the charge-density wave transition. It is proposed that poor screening in the cuprates originates from fluctuating charge inhomogeneities in the copper-oxygen planes. 相似文献
42.
Gareth AD Hardy Nesrina Imami Mark R Nelson Ann K Sullivan Ron Moss Marlén MI Aasa-Chapman Brian Gazzard Frances M Gotch 《Journal of immune based therapies and vaccines》2007,5(1):6-12
Background
Fully functional HIV-1-specific CD8 and CD4 effector T-cell responses are vital to the containment of viral activity and disease progression. These responses are lacking in HIV-1-infected patients with progressive disease. We attempted to augment fully functional HIV-1-specific CD8 and CD4 effector T-cell responses in patients with advanced chronic HIV-1 infection. 相似文献43.
Carolyn Ferguson Steven L Hardy David F Werner Stanley M Hileman Timothy M DeLorey Gregg E Homanics 《BMC neuroscience》2007,8(1):85
Background
The β3 subunit of the γ-aminobutyric acid type A receptor (GABAA-R) has been reported to be important for palate formation, anesthetic action, and normal nervous system function. This subunit has also been implicated in the pathogenesis of Angelman syndrome and autism spectrum disorder. To further investigate involvement of this subunit, we previously produced mice with a global knockout of β3. However, developmental abnormalities, compensation, reduced viability, and numerous behavioral abnormalities limited the usefulness of that murine model. To overcome many of these limitations, a mouse line with a conditionally inactivated β3 gene was engineered. 相似文献44.
45.
Katsunari Enomoto Pavle Djuricanin Ilja Gerhardt Omid Nourbakhsh Yoshiki Moriwaki Walter Hardy Takamasa Momose 《Applied physics. B, Lasers and optics》2012,109(1):149-157
We propose the use of superconducting microwave cavities for the focusing and deceleration of cold polar molecular beams. A superconducting cavity with a high quality factor produces a large ac Stark shift in polar molecules, which allow us to efficiently control molecular motion. Our discussion is based on the experimental characterization of a prototype cavity: a lead–tin-coated cylindrical copper cavity, which has a quality factor of 106 and tolerates several watts of input power. Such a microwave device provides a powerful way to control molecules not only in low-field-seeking states, but also in high-field-seeking states such as the ground rotational state. 相似文献
46.
47.
48.
49.
50.
Analytical and Bioanalytical Chemistry - 相似文献