全文获取类型
收费全文 | 14075篇 |
免费 | 340篇 |
国内免费 | 474篇 |
专业分类
化学 | 2136篇 |
晶体学 | 47篇 |
力学 | 132篇 |
综合类 | 26篇 |
数学 | 11191篇 |
物理学 | 1357篇 |
出版年
2023年 | 47篇 |
2022年 | 78篇 |
2021年 | 67篇 |
2020年 | 66篇 |
2019年 | 339篇 |
2018年 | 371篇 |
2017年 | 186篇 |
2016年 | 140篇 |
2015年 | 168篇 |
2014年 | 393篇 |
2013年 | 1014篇 |
2012年 | 443篇 |
2011年 | 812篇 |
2010年 | 629篇 |
2009年 | 895篇 |
2008年 | 1010篇 |
2007年 | 1010篇 |
2006年 | 807篇 |
2005年 | 564篇 |
2004年 | 463篇 |
2003年 | 404篇 |
2002年 | 292篇 |
2001年 | 274篇 |
2000年 | 277篇 |
1999年 | 320篇 |
1998年 | 289篇 |
1997年 | 236篇 |
1996年 | 345篇 |
1995年 | 335篇 |
1994年 | 317篇 |
1993年 | 270篇 |
1992年 | 213篇 |
1991年 | 103篇 |
1990年 | 92篇 |
1989年 | 69篇 |
1988年 | 66篇 |
1987年 | 104篇 |
1986年 | 74篇 |
1985年 | 154篇 |
1984年 | 128篇 |
1983年 | 104篇 |
1982年 | 142篇 |
1981年 | 148篇 |
1980年 | 109篇 |
1979年 | 75篇 |
1978年 | 109篇 |
1977年 | 109篇 |
1976年 | 98篇 |
1975年 | 40篇 |
1973年 | 36篇 |
排序方式: 共有10000条查询结果,搜索用时 250 毫秒
171.
172.
Moessbauer studies on the effect of substitution with 3% Al, Co, Mn atoms in the intermetallic compound of Hf0.8Ta0.2Fe2 are reported. The Al substitution leads to increase of the FM-AFM transition temperature and to decrease of the AFM-PM transition temperature. The Co substitution leads to disappearance of the FM state, only showing some FM impurity component, while Mn substituted compound indicates coexistence of FM and AFM states at low temperature. The phenomena imply complex itinerant electron properties in these magnetic systems. 相似文献
173.
In this paper, we prove a sharpening of large deviation for increments of Brownian motion in (p,r)-capacity and Hölder norm case. As an application, we obtain a functional modulus of continuity for (p,r)-capacity in the stronger topology. 相似文献
174.
Christophe Cuny 《Journal of multivariate analysis》2006,97(8):1842-1869
Let (Xm,n)(m,n)∈Z2 be a Cp-valued wide sense stationary process. We study the prediction theory of such processes according to different total orders on Z2. In the case of a “rational order”, we give the spectral distribution of the resulting evanescent component and prove that for two different rational orders, the resulting evanescent components are mutually orthogonal. 相似文献
175.
Armen Shirikyan 《Probability Theory and Related Fields》2006,134(2):215-247
We consider a class of dissipative PDE's perturbed by an external random force. Under the condition that the distribution
of perturbation is sufficiently non-degenerate, a strong law of large numbers (SLLN) and a central limit theorem (CLT) for
solutions are established and the corresponding rates of convergence are estimated. It is also shown that the estimates obtained
are close to being optimal. The proofs are based on the property of exponential mixing for the problem in question and some
abstract SLLN and CLT for mixing-type Markov processes. 相似文献
176.
177.
Chang-Wan Kim 《Archiv der Mathematik》2007,88(4):378-384
We showed that any compact locally symmetric Finsler metric with positive flag curvature must be Riemannian.
Dedicated to Professor Karsten Grove on the occassion of his sixtieth birthday
Received: 8 May 2006 相似文献
178.
We will give some conditions for Sobolev spaces on bounded Lipschitz domains to admit only trivial isometries. 相似文献
179.
We show that the isotropy types of the singularities of Riemannian orbifolds are not determined by the Laplace spectrum. Indeed,
we construct arbitrarily large families of mutually isospectral orbifolds with different isotropy types. Finally, we show
that the corresponding singular strata of two isospectral orbifolds may not be homeomorphic.
Received: 6 October 2005 相似文献
180.