全文获取类型
收费全文 | 8091篇 |
免费 | 703篇 |
国内免费 | 1102篇 |
专业分类
化学 | 86篇 |
晶体学 | 1篇 |
力学 | 223篇 |
综合类 | 194篇 |
数学 | 8131篇 |
物理学 | 1261篇 |
出版年
2024年 | 15篇 |
2023年 | 84篇 |
2022年 | 91篇 |
2021年 | 130篇 |
2020年 | 174篇 |
2019年 | 232篇 |
2018年 | 228篇 |
2017年 | 235篇 |
2016年 | 267篇 |
2015年 | 173篇 |
2014年 | 385篇 |
2013年 | 616篇 |
2012年 | 353篇 |
2011年 | 485篇 |
2010年 | 462篇 |
2009年 | 640篇 |
2008年 | 613篇 |
2007年 | 638篇 |
2006年 | 539篇 |
2005年 | 483篇 |
2004年 | 393篇 |
2003年 | 421篇 |
2002年 | 385篇 |
2001年 | 255篇 |
2000年 | 291篇 |
1999年 | 275篇 |
1998年 | 233篇 |
1997年 | 215篇 |
1996年 | 134篇 |
1995年 | 69篇 |
1994年 | 66篇 |
1993年 | 38篇 |
1992年 | 36篇 |
1991年 | 23篇 |
1990年 | 16篇 |
1989年 | 18篇 |
1988年 | 19篇 |
1987年 | 7篇 |
1986年 | 4篇 |
1985年 | 15篇 |
1984年 | 27篇 |
1983年 | 15篇 |
1982年 | 23篇 |
1981年 | 14篇 |
1980年 | 20篇 |
1979年 | 11篇 |
1978年 | 9篇 |
1977年 | 6篇 |
1976年 | 3篇 |
1936年 | 4篇 |
排序方式: 共有9896条查询结果,搜索用时 437 毫秒
941.
942.
Xing-Hua ZhuJian-Zhong Xiao 《Applied mathematics and computation》2011,217(12):6004-6010
A new continuity theorem of minimum selection is presented for a continuous set-valued operator from a topological space into a Banach space with some uniform convexity. As applications, some problems concerning minimum right inverses for linear operators and minimum fixed points for condensing set-valued nonlinear operators are discussed. Also, the existence of minimum solutions for an integral inclusion is proved. 相似文献
943.
In this paper, a singularly perturbed delay differential equation of first order has been considered. The problem is solved by using a hybrid scheme on a Shishkin mesh. The difference scheme is shown to converge to the continuous solution uniformly with respect to the perturbation parameter. Truncation errors are obtained. Finally, numerical experiments are carried out on a test problem, confirming the effectiveness of the proposed technique. 相似文献
944.
In this paper, a new iterative scheme by hybrid method is constructed. Strong convergence of the scheme to a common element of the set of common fixed points of finite family of relatively quasi-nonexpansive mappings and set of common solutions of a system of equilibrium problems in a uniformly convex and uniformly smooth real Banach space is proved using the properties of generalized f-projection operator. Our results extend important recent results. 相似文献
945.
Let ψ be a holomorphic function on the open unit disk D and φ a holomorphic self-map of D. Let Cφ,Mψ and D denote the composition, multiplication and differentiation operator, respectively. We find an asymptotic expression for the essential norm of products of these operators on weighted Bergman spaces on the unit disk. This paper is a continuation of our recent paper concerning the boundedness of these operators on weighted Bergman spaces. 相似文献
946.
Weifeng Yang 《Applied mathematics and computation》2011,218(4):1443-1448
In this note we characterize the boundedness and compactness of the composition operator from the general function space F(p, q, s) to the nth weighted-type space on the unit disk, where the nth weighted-type space has been recently introduced by Stevo Stevi?. 相似文献
947.
Ehliman AdigüzelovYonca Sezer 《Applied mathematics and computation》2011,218(5):2113-2121
Let L0 and L be operators which are formed by the differential expressions.
?0(y)=(-1)my(2m)(x)+Ay(x) 相似文献
948.
Miomir S. Stankovi?Sladjana D. Marinkovi? Predrag M. Rajkovi? 《Applied mathematics and computation》2011,218(6):2439-2448
In the recent development in various disciplines of physics, it is noted the need for including the deformed versions of the exponential functions. In last two decades, the Tsallis and Kaniadakis versions have found a lot of applications. In this paper, we consider the deformations which have two purposes. First, we introduce them like beginning of a more general mathematical approach where the Tsallis and Kaniadakis exponential functions are the special cases. Then, we wish to pay attention to the mathematical community that they have a lot of interesting properties from mathematical point of view and possibilities in applications. Really, we will show the differential and difference properties of our deformations which are important for the formation and explanation of continuous and discrete models of numerous phenomena. 相似文献
949.
Siwaporn Saewan Poom Kumam 《Applied mathematics and computation》2011,218(7):3522-3538
We introduce a modified block hybrid projection algorithm for finding a common element of the set of common fixed points of an infinite family of closed and uniformly quasi-?-asymptotically nonexpansive mappings, the set of the variational inequality for an α-inverse-strongly monotone operator, the set of solutions of the mixed equilibrium problems. Then, we obtain strong convergence theorems for the sequences generated by this process in a 2-uniformly convex and uniformly smooth Banach space. Our results extend and improve ones from several earlier works. 相似文献
950.
Sorin G. Gal 《Applied mathematics and computation》2011,218(6):2944-2951
In the recent years the extension of linear positive operators from real to complex domain is one of the interesting area of research. In this context, we present the exact order of simultaneous approximation and Voronovskaja kind results with quantitative estimate for a new type of complex Durrmeyer operator (different from those previously studied), attached to analytic functions in compact disks. In this way, we put in evidence the overconvergence phenomenon for this kind of Durrmeyer operator, namely the extensions of approximation properties with exact quantitative estimates, from the real interval [1/3, 2/3] to compact disks in the complex plane. 相似文献