全文获取类型
收费全文 | 351篇 |
免费 | 6篇 |
国内免费 | 2篇 |
专业分类
化学 | 175篇 |
晶体学 | 1篇 |
力学 | 2篇 |
数学 | 28篇 |
物理学 | 153篇 |
出版年
2020年 | 5篇 |
2019年 | 7篇 |
2018年 | 6篇 |
2017年 | 5篇 |
2016年 | 3篇 |
2014年 | 10篇 |
2013年 | 15篇 |
2012年 | 10篇 |
2011年 | 16篇 |
2010年 | 10篇 |
2009年 | 7篇 |
2008年 | 9篇 |
2007年 | 14篇 |
2006年 | 16篇 |
2005年 | 14篇 |
2004年 | 10篇 |
2003年 | 10篇 |
2002年 | 8篇 |
2001年 | 7篇 |
2000年 | 10篇 |
1999年 | 10篇 |
1998年 | 4篇 |
1997年 | 6篇 |
1996年 | 7篇 |
1993年 | 7篇 |
1992年 | 8篇 |
1989年 | 3篇 |
1988年 | 4篇 |
1987年 | 4篇 |
1985年 | 5篇 |
1983年 | 3篇 |
1982年 | 8篇 |
1981年 | 4篇 |
1980年 | 6篇 |
1979年 | 3篇 |
1978年 | 14篇 |
1977年 | 7篇 |
1976年 | 5篇 |
1975年 | 3篇 |
1974年 | 3篇 |
1973年 | 4篇 |
1971年 | 5篇 |
1968年 | 5篇 |
1967年 | 4篇 |
1966年 | 3篇 |
1956年 | 2篇 |
1955年 | 2篇 |
1932年 | 2篇 |
1928年 | 2篇 |
1925年 | 2篇 |
排序方式: 共有359条查询结果,搜索用时 15 毫秒
61.
62.
Marius Ciprian Rusu Christophe Block Guy Van Assche Bruno Van Mele 《Journal of Thermal Analysis and Calorimetry》2012,110(1):287-294
Photo-DSC was used to investigate the cure kinetics of a photo-initiated resin. The exothermal photo-polymerization reactions were performed in isothermal mode. The irradiation of photo-initiated resin was studied under different conditions of temperature, UV lamp intensity, and reaction atmosphere (nitrogen and air). The results obtained by photo-DSC allowed us to determine kinetic data of the photo-polymerized reactions: the global activation energy and reaction enthalpy, and the conversion as a function of time and temperature. Modulated temperature DSC measurements were carried out to verify whether vitrification occurs during polymerization. The conversion at the top and bottom of irradiated samples was obtained by FT-IR spectroscopy before and after photo-polymerization. A non-homogenous photo-polymerization into the material was observed, probably because of the light absorptions effects within the uppermost layers. 相似文献
63.
Yu. Suchorski W. A. Schmidt N. Ernst J. H. Block H. J. Kreuzer 《Progress in Surface Science》1995,48(1-4):121-134
This review describes recent field ion microscopic measurements of local electrostatic fields in the immediate vicinity of individual surface atoms. The studies were stimulated and supported by self-consistent theoretical calculations on the field distribution close to single atoms of different electronic structure adsorbed on a metal surface in the presence of high external fields. The experimental and theoretical data establish the existence of strongly varying local field distributions above different surface atoms. New details concerning localized field ionization and image formation processes occurring in the field ion microscope are revealed. 相似文献
64.
The title compounds were prepared from coldpressed pellets of the elemental components by arcmelting. They crystallize with the orthorhombic Er2FeC4-type structure, which was refined from X-ray data of an Er2MnC4 single crystal: Ibam, a = 760.4(1)pm, b = 937.1(1)pm, c = 504.0(1)pm, R = 0.021 for 524 structure factors and 17 variable parameters. Y2MnC4 does not become superconducting down to 1.7 K. Chemical bonding in these compounds is briefly discussed. 相似文献
65.
66.
67.
68.
69.
70.