全文获取类型
收费全文 | 509572篇 |
免费 | 5225篇 |
国内免费 | 1608篇 |
专业分类
化学 | 256393篇 |
晶体学 | 7201篇 |
力学 | 25163篇 |
综合类 | 13篇 |
数学 | 80441篇 |
物理学 | 147194篇 |
出版年
2021年 | 3816篇 |
2020年 | 4229篇 |
2019年 | 4586篇 |
2018年 | 15654篇 |
2017年 | 15386篇 |
2016年 | 14603篇 |
2015年 | 6393篇 |
2014年 | 8902篇 |
2013年 | 20735篇 |
2012年 | 19147篇 |
2011年 | 28958篇 |
2010年 | 18787篇 |
2009年 | 19011篇 |
2008年 | 23799篇 |
2007年 | 25598篇 |
2006年 | 16502篇 |
2005年 | 15778篇 |
2004年 | 14973篇 |
2003年 | 13758篇 |
2002年 | 12663篇 |
2001年 | 13643篇 |
2000年 | 10342篇 |
1999年 | 8043篇 |
1998年 | 6735篇 |
1997年 | 6445篇 |
1996年 | 6271篇 |
1995年 | 5588篇 |
1994年 | 5465篇 |
1993年 | 5286篇 |
1992年 | 5881篇 |
1991年 | 5985篇 |
1990年 | 5716篇 |
1989年 | 5528篇 |
1988年 | 5552篇 |
1987年 | 5439篇 |
1986年 | 5150篇 |
1985年 | 6617篇 |
1984年 | 6740篇 |
1983年 | 5341篇 |
1982年 | 5432篇 |
1981年 | 5416篇 |
1980年 | 5004篇 |
1979年 | 5396篇 |
1978年 | 5528篇 |
1977年 | 5408篇 |
1976年 | 5352篇 |
1975年 | 4932篇 |
1974年 | 4901篇 |
1973年 | 4913篇 |
1972年 | 3473篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Suppose there exists a global solution u to the incompressible Navier–Stokes equations, such that . We prove that its norm goes to 0 at infinity. We next use this fact to control the norm of u, and finally we prove that such a solution is stable. To cite this article: I. Gallagher et al., C. R. Acad. Sci. Paris, Ser. I 334 (2002) 289–292. 相似文献
82.
Kasper K. Berthelsen Jesper Møller 《Bulletin of the Brazilian Mathematical Society》2002,33(3):351-367
This primer provides a self-contained exposition of the case where spatial birth-and-death processes are used for perfect
simulation of locally stable point processes. Particularly, a simple dominating coupling from the past (CFTP) algorithm and
the CFTP algorithms introduced in [13], [14], and [5] are studied. Some empirical results for the algorithms are discussed.
Received: 30 June 2002 相似文献
83.
Julio Castellanos 《Mathematische Zeitschrift》2002,239(4):777-802
We consider complete ideals supported on finite sequences of infinitely near points, in regular local rings with dimensions
greater than two. We study properties of factorizations in Lipman special *-simple complete ideals. We relate it to a type
of proximity, linear proximity, of the points, and give conditions in order to have unique factorization. Several examples
are presented.
Received: 2 February 2000 / in final form: 14 March 2001 / Published online: 18 January 2002 相似文献
84.
85.
By using the method of generalized conjugation problems, we propose a numerical scheme for investigation of the redistribution of temperature stresses in a piecewise-homogeneous cylindrical shell caused by a longitudinal crack. This scheme is based on systems of integral equations (some of them are singular) to determine the unknown jumps of integral characteristics of the disturbed temperature field and displacements and their derivatives on the line of a crack and on the interface as well as the derivatives of these integral characteristics with respect to the longitudinal coordinate at the interface. 相似文献
86.
87.
88.
Claudia-Elisabeth Wulz 《Czechoslovak Journal of Physics》2002,52(3):C155-C170
The principal physics goals of the Compact Muon Solenoid experiment under construction at the Large Hadron Collider at CERN in Geneva are reviewed. Procedures to search for the Standard Model Higgs boson, supersymmetric Higgses and other supersymmetric particles are described. 相似文献
89.
90.
K. Batra V. Prasad M. Mohan 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2002,20(2):191-198
The scattering of heavy ion with a multilevel Rydberg atom in the presence of an electromagnetic field is studied. The interaction
of Rydberg atom and the e.m field is explored using non-perturbative quasi-energy technique. Although the results are presented
for selected excitations but in actual calculations we have included many levels of the atom. The effect of various parameters
are shown on collisional excitation process. As an illustration detailed calculations are performed for the inelastic proton-Na
Rydberg atom collision accompanied by the transfer of photons and the effects of dressing due to the field are considered.
The emphasis of the present work is on collision induced transitions especially the case that involves change of orbital as
well as principal quantum number.
Received 26 December 2001 / Received in final form 8 April 2002 Published online 19 July 2002 相似文献