全文获取类型
收费全文 | 2616篇 |
免费 | 156篇 |
国内免费 | 104篇 |
专业分类
化学 | 282篇 |
晶体学 | 2篇 |
力学 | 149篇 |
综合类 | 16篇 |
数学 | 1839篇 |
物理学 | 588篇 |
出版年
2024年 | 3篇 |
2023年 | 20篇 |
2022年 | 17篇 |
2021年 | 26篇 |
2020年 | 49篇 |
2019年 | 59篇 |
2018年 | 62篇 |
2017年 | 61篇 |
2016年 | 63篇 |
2015年 | 49篇 |
2014年 | 102篇 |
2013年 | 318篇 |
2012年 | 125篇 |
2011年 | 140篇 |
2010年 | 101篇 |
2009年 | 140篇 |
2008年 | 127篇 |
2007年 | 132篇 |
2006年 | 136篇 |
2005年 | 113篇 |
2004年 | 96篇 |
2003年 | 101篇 |
2002年 | 111篇 |
2001年 | 78篇 |
2000年 | 68篇 |
1999年 | 77篇 |
1998年 | 63篇 |
1997年 | 68篇 |
1996年 | 41篇 |
1995年 | 49篇 |
1994年 | 49篇 |
1993年 | 29篇 |
1992年 | 33篇 |
1991年 | 18篇 |
1990年 | 17篇 |
1989年 | 15篇 |
1988年 | 11篇 |
1987年 | 12篇 |
1986年 | 6篇 |
1985年 | 20篇 |
1984年 | 13篇 |
1983年 | 12篇 |
1982年 | 13篇 |
1981年 | 7篇 |
1980年 | 4篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1976年 | 4篇 |
1973年 | 3篇 |
排序方式: 共有2876条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
Rong Yin Jihui Zhang Xudong Shang 《Mathematical Methods in the Applied Sciences》2020,43(15):8736-8752
This paper is dedicated to studying the following Schrödinger–Poisson system Under some different assumptions on functions V(x), K(x), a(x) and f(u), by using the variational approach, we establish the existence of positive ground state solutions. 相似文献
5.
Denis Serre 《Comptes Rendus Mecanique》2018,346(3):175-183
In this review paper, we discuss helicity from a geometrical point of view and see how it applies to the motion of a perfect fluid. We discuss its relation with the Hamiltonian structure, and then its extension to arbitrary space dimensions. We also comment about the existence of additional conservation laws for the Euler equation, and its unlikely integrability in Liouville's sense. 相似文献
6.
7.
We consider systems that are subject to an external mixed Poisson shock process. Each shock can result in a failure of a system with a given probability and is survived with the complementary probability. Each shock additionally decreases the quality function that describes the performance of a system, thus forming the corresponding stochastic process. Expectations (unconditional and conditional on survival) and relevant variability characteristics for the stochastic quality function are derived. Some monotonicity properties of the conditional quality function are investigated and the future values of this function are derived. 相似文献
8.
This article proposes a global, chaos-based procedure for the discretization of functionals of Brownian motion into functionals of a Poisson process with intensity . Under this discretization we study the weak convergence, as the intensity of the underlying Poisson process goes to infinity, of Poisson functionals and their corresponding Malliavin-type derivatives to their Wiener counterparts. In addition, we derive a convergence rate of for the Poisson discretization of Wiener functionals by combining the multivariate Chen–Stein method with the Malliavin calculus. Our proposed sufficient condition for establishing the mentioned convergence rate involves the kernel functions in the Wiener chaos, yet we provide examples, especially the discretization of some common path dependent Wiener functionals, to which our results apply without committing the explicit computations of such kernels. To the best our knowledge, these are the first results in the literature on the universal convergence rate of a global discretization of general Wiener functionals. 相似文献
9.
10.
In this paper, we study the Heinz type inequalities for mappings satisfying Poisson’s equation. Some results generalize the ones obtained by Partyka and Sakan. 相似文献