全文获取类型
收费全文 | 4386篇 |
免费 | 238篇 |
国内免费 | 563篇 |
专业分类
化学 | 32篇 |
力学 | 41篇 |
综合类 | 55篇 |
数学 | 4892篇 |
物理学 | 167篇 |
出版年
2024年 | 7篇 |
2023年 | 88篇 |
2022年 | 39篇 |
2021年 | 60篇 |
2020年 | 89篇 |
2019年 | 133篇 |
2018年 | 140篇 |
2017年 | 131篇 |
2016年 | 134篇 |
2015年 | 100篇 |
2014年 | 191篇 |
2013年 | 363篇 |
2012年 | 136篇 |
2011年 | 207篇 |
2010年 | 202篇 |
2009年 | 301篇 |
2008年 | 313篇 |
2007年 | 329篇 |
2006年 | 302篇 |
2005年 | 270篇 |
2004年 | 218篇 |
2003年 | 198篇 |
2002年 | 187篇 |
2001年 | 142篇 |
2000年 | 150篇 |
1999年 | 140篇 |
1998年 | 121篇 |
1997年 | 127篇 |
1996年 | 81篇 |
1995年 | 43篇 |
1994年 | 35篇 |
1993年 | 15篇 |
1992年 | 17篇 |
1991年 | 13篇 |
1990年 | 10篇 |
1989年 | 6篇 |
1988年 | 11篇 |
1987年 | 5篇 |
1986年 | 7篇 |
1985年 | 15篇 |
1984年 | 10篇 |
1983年 | 9篇 |
1982年 | 14篇 |
1981年 | 9篇 |
1980年 | 19篇 |
1979年 | 12篇 |
1978年 | 13篇 |
1977年 | 8篇 |
1976年 | 5篇 |
1975年 | 4篇 |
排序方式: 共有5187条查询结果,搜索用时 26 毫秒
71.
S. Park 《Journal of Optimization Theory and Applications》1997,95(2):409-417
From a general minimax inequality or an abstract lopsided saddle-point theorem, we deduce general Karamardian-type equilibrium theorems and generalized complementarity theorems. Our new results extend a number of well-known earlier works of many authors. 相似文献
72.
73.
Qiji J. Zhu 《Set-Valued Analysis》1998,6(2):171-185
Several different basic tools are used for studying subdifferentials. They are a nonlocal fuzzy sum rule in (Borwein et al., 1996; Zhu, 1996), a multidirectional mean value theorem in (Clarke and Ledyaev, 1994; Clarke et al., 1998), local fuzzy sum rules in (Ioffe, 1984, 1990) and an extremal principle in (Kruger and Mordukhovich, 1980; Mordukhovich, 1976, 1980, 1994). We show that all these basic results are equivalent and discuss some interesting consequences of this equivalence. 相似文献
74.
本文考虑交换子[b,T]在 Triebel-Lizorkin 空间上的有界性,其中 b∈BMO(R~n),T 是卷积型奇异积分算子,其核为Ω∈L log~ L(S~(n-1)),给出了该交换子在 F_p~(s,p)(R~n)(s>0,1<p,q<∞) 上有界的一个等价条件. 相似文献
75.
Subhashis Nag 《Proceedings Mathematical Sciences》1989,99(2):103-111
We study some explicit relations between the canonical line bundle and the Hodge bundle over moduli spaces for low genus.
This leads to a natural measure on the moduli space of every genus which is related to the Siegel symplectic metric on Siegel
upper half-space as well as to the Hodge metric on the Hodge bundle. 相似文献
76.
Noga Alon Oded Goldreich Johan Hstad Ren Peralta 《Random Structures and Algorithms》1992,3(3):289-304
We present three alternative simple constructions of small probability spaces on n bits for which any k bits are almost independent. The number of bits used to specify a point in the sample space is (2 + o(1)) (log log n + k/2 + log k + log 1/?), where ? is the statistical difference between the distribution induced on any k bit locations and the uniform distribution. This is asymptotically comparable to the construction recently presented by Naor and Naor (our size bound is better as long as ? < 1/(k log n)). An additional advantage of our constructions is their simplicity. 相似文献
77.
Mark C. Veraar 《Proceedings of the American Mathematical Society》2007,135(5):1477-1486
In this paper we prove the equivalence of decoupling inequalities for stochastic integrals and one-sided randomized versions of the UMD property of a Banach space as introduced by Garling.
78.
We investigate traces of functions, belonging to a class of functions with dominating mixed smoothness in ℝ3, with respect to planes in oblique position. In comparison with the classical theory for isotropic spaces a few new phenomenona
occur. We shall present two different approaches. One is based on the use of the Fourier transform and restricted to p = 2. The other one is applicable in the general case of Besov-Lizorkin-Triebel spaces and based on atomic decompositions. 相似文献
79.
Frédéric Mynard 《Topology and its Applications》2007,154(4):953-968
Two results on product of compact filters are shown to be the common principle behind a surprisingly large number of theorems. 相似文献
80.
Commutators of singular integrals on spaces of homogeneous type 总被引:1,自引:0,他引:1
In this work we prove some sharp weighted inequalities on spaces of homogeneous type for the higher order commutators of singular
integrals introduced by R. Coifman, R. Rochberg and G. Weiss in Factorization theorems for Hardy spaces in several variables,
Ann. Math. 103 (1976), 611–635. As a corollary, we obtain that these operators are bounded on L
p
(w) when w belongs to the Muckenhoupt’s class A
p
, p > 1. In addition, as an important tool in order to get our main result, we prove a weighted Fefferman-Stein type inequality
on spaces of homogeneous type, which we have not found previously in the literature. 相似文献