全文获取类型
收费全文 | 2019篇 |
免费 | 4篇 |
国内免费 | 11篇 |
专业分类
化学 | 1386篇 |
晶体学 | 12篇 |
力学 | 34篇 |
数学 | 345篇 |
物理学 | 257篇 |
出版年
2022年 | 8篇 |
2020年 | 14篇 |
2019年 | 8篇 |
2018年 | 13篇 |
2017年 | 10篇 |
2016年 | 14篇 |
2015年 | 12篇 |
2014年 | 22篇 |
2013年 | 104篇 |
2012年 | 81篇 |
2011年 | 99篇 |
2010年 | 76篇 |
2009年 | 42篇 |
2008年 | 103篇 |
2007年 | 106篇 |
2006年 | 123篇 |
2005年 | 131篇 |
2004年 | 112篇 |
2003年 | 95篇 |
2002年 | 79篇 |
2001年 | 16篇 |
2000年 | 20篇 |
1999年 | 21篇 |
1998年 | 20篇 |
1997年 | 32篇 |
1996年 | 33篇 |
1995年 | 16篇 |
1994年 | 35篇 |
1993年 | 32篇 |
1992年 | 15篇 |
1991年 | 21篇 |
1990年 | 24篇 |
1989年 | 19篇 |
1988年 | 21篇 |
1987年 | 18篇 |
1986年 | 17篇 |
1985年 | 30篇 |
1984年 | 31篇 |
1983年 | 15篇 |
1982年 | 52篇 |
1981年 | 41篇 |
1980年 | 36篇 |
1979年 | 34篇 |
1978年 | 30篇 |
1977年 | 36篇 |
1976年 | 26篇 |
1975年 | 19篇 |
1974年 | 19篇 |
1973年 | 13篇 |
1971年 | 8篇 |
排序方式: 共有2034条查询结果,搜索用时 125 毫秒
161.
Volume Contents
Contents to Volume 8 相似文献162.
N2-broadening coefficients have been measured for 41 transitions of PH3 at −100 °C in the QR branch of the ν2 band and the PP, RP, and SP branches of the ν4 band, using a tunable diode-laser spectrometer. The recorded lines with J values ranging from 1 to 13 and K from 0 to 10 are located between 1026 and 1093 cm−1. The collisional widths are determined by fitting each spectral line with a Voigt profile, a Rautian profile, and a speed-dependent Rautian profile. The latter models provide larger broadening coefficients than the Voigt model. These coefficients have also been calculated on the basis of a semiclassical model of interacting linear molecules by considering an atom-atom Lennard-Jones potential in addition to the electrostatic contributions. By comparing broadening coefficients at room and low temperatures, the temperature dependence of these broadenings has been determined both experimentally and theoretically. 相似文献
163.
Jean-Pierre Djukic Michel Pfeffer Nathalie Gruber-Kyritsakas André de Cian 《Journal of organometallic chemistry》2011,696(20):3268-3273
A Mn(I) tricarbonyl complex of a 1,3-diferrocenyl-1-oxopentadienyl ligand was synthesised adventitiously by what seems to be an in-situ aldol-like condensation of two acetylferrocene units promoted by benzyl-Mn(CO)5. X-ray structural analysis of this unexpected product confirms the η5 coordination of the 1,3-diferrocenyl-1-oxopentadienyl ligand to the Mn(CO)3 moiety. The nature of the metal-ligand bonding relationship was studied by theoretical calculations; it outlines the charge unbalance (polarisation) at the oxopentadienyl moiety as well as the lack of ketone character of the latter Mn-bound ligand. 相似文献
164.
Flow visualization and beyond 总被引:1,自引:0,他引:1
Jean-Pierre Prenel 《Optics and Lasers in Engineering》2012,50(1):1-7
165.
166.
Jean-Pierre Kahane 《Journal of Functional Analysis》2008,255(9):2533-2544
167.
This paper is devoted to the analysis of a numerical scheme for the coagulation and fragmentation equation. A time explicit finite volume scheme is developed, based on a conservative formulation of the equation. It is shown to converge under a stability condition on the time step, while a first order rate of convergence is established and an explicit error estimate is given. Finally, several numerical simulations are performed to investigate the gelation phenomenon and the long time behavior of the solution.
168.
In this Note, we deal with one kind of stochastic nonzero-sum differential game problem for N players. Using the theory of backward stochastic differential equations and Malliavin calculus, we give the explicit form of a Nash equilibrium point. To cite this article: J.-P. Lepeltier et al., C. R. Acad. Sci. Paris, Ser. I 347 (2009). 相似文献
169.
Dominique Petit Jean-Pierre Korb Pierre Levitz Jean LeBideau David Brevet 《Comptes Rendus Chimie》2010,13(4):409-411
We present the first results of the nuclear magnetic relaxation dispersion (NMRD) of the confined proton-bearing cation (BMI) and fluorine-bearing anion (TFSI) pair of ionic liquids (Li+-ionogels) confined within a silica-like mesoporous matrices designed for lithium batteries. These results are in favour of a very-correlated dynamical motion of the anion–cation pair within the solid and disordered silica matrix. 相似文献
170.