全文获取类型
收费全文 | 3334篇 |
免费 | 180篇 |
国内免费 | 325篇 |
专业分类
化学 | 129篇 |
力学 | 101篇 |
综合类 | 62篇 |
数学 | 3099篇 |
物理学 | 448篇 |
出版年
2024年 | 6篇 |
2023年 | 31篇 |
2022年 | 23篇 |
2021年 | 53篇 |
2020年 | 66篇 |
2019年 | 73篇 |
2018年 | 83篇 |
2017年 | 74篇 |
2016年 | 85篇 |
2015年 | 50篇 |
2014年 | 161篇 |
2013年 | 230篇 |
2012年 | 143篇 |
2011年 | 146篇 |
2010年 | 161篇 |
2009年 | 216篇 |
2008年 | 237篇 |
2007年 | 261篇 |
2006年 | 218篇 |
2005年 | 167篇 |
2004年 | 135篇 |
2003年 | 166篇 |
2002年 | 146篇 |
2001年 | 134篇 |
2000年 | 119篇 |
1999年 | 104篇 |
1998年 | 109篇 |
1997年 | 80篇 |
1996年 | 71篇 |
1995年 | 38篇 |
1994年 | 34篇 |
1993年 | 20篇 |
1992年 | 19篇 |
1991年 | 17篇 |
1990年 | 12篇 |
1989年 | 9篇 |
1988年 | 15篇 |
1987年 | 8篇 |
1986年 | 6篇 |
1985年 | 20篇 |
1984年 | 10篇 |
1983年 | 13篇 |
1982年 | 16篇 |
1981年 | 8篇 |
1980年 | 7篇 |
1979年 | 8篇 |
1978年 | 7篇 |
1976年 | 8篇 |
1975年 | 6篇 |
1974年 | 4篇 |
排序方式: 共有3839条查询结果,搜索用时 21 毫秒
111.
Palle E.T. Jorgensen Erin P.J. Pearse 《Journal of Mathematical Analysis and Applications》2019,469(2):765-807
Motivated by applications to machine learning, we construct a reversible and irreducible Markov chain whose state space is a certain collection of measurable sets of a chosen l.c.h. space . We study the resulting network (connected undirected graph), including transience, Royden and Riesz decompositions, and kernel factorization. We describe a construction for Hilbert spaces of signed measures which comes equipped with a new notion of reproducing kernels and there is a unique solution to a regularized optimization problem involving the approximation of functions by functions of finite energy. The latter has applications to machine learning (for Markov random fields, for example). 相似文献
112.
113.
114.
115.
116.
Thomas Mikosch Mohsen Rezapour Olivier Wintenberger 《Stochastic Processes and their Applications》2019,129(11):4638-4662
In this paper we consider a stochastic model of perpetuity-type. In contrast to the classical affine perpetuity model of Kesten (1973) and Goldie (1991) all discount factors in the model are mutually independent. We prove that the tails of the distribution of this model are regularly varying both in the univariate and multivariate cases. Due to the additional randomness in the model the tails are not pure power laws as in the Kesten–Goldie setting but involve a logarithmic term. 相似文献
117.
Under the assumption that μ is a non-doubling measure on Rdwhich only satisfies the polynomial growth condition,the authors obtain the boundedness of the multilinear fractional integrals on Morrey spaces,weak-Morrey spaces and Lipschitz spaces associated with μ,which,in the case when μ is the d-dimensional Lebesgue measure,also improve the known results. 相似文献
118.
We show that a recently proposed Rudin–Shapiro-like sequence, with balanced weights, has purely singular continuous diffraction spectrum, in contrast to the well-known Rudin–Shapiro sequence whose diffraction is absolutely continuous. This answers a question that had been raised about this new sequence. 相似文献
119.
Antonio M. Scarfone Hiroki Suyari Tatsuaki Wada 《Central European Journal of Physics》2009,7(3):414-420
We reformulate the Gauss’ law of error in presence of correlations which are taken into account by means of a deformed product
arising in the framework of the Sharma-Taneja-Mittal measure. Having reviewed the main proprieties of the generalized product
and its related algebra, we derive, according to the Maximum Likelihood Principle, a family of error distributions with an
asymptotic power-law behavior.
相似文献
120.
We found that the Wigner-Yanase skew information, which has been recently proposed as a measure of coherence in Girolami (2014), can increase under a class of operations which may be interpreted as incoherent following the framework of Baumgratz et al., while being phase sensitive. 相似文献