全文获取类型
收费全文 | 870篇 |
免费 | 60篇 |
国内免费 | 96篇 |
专业分类
化学 | 9篇 |
力学 | 46篇 |
综合类 | 32篇 |
数学 | 906篇 |
物理学 | 33篇 |
出版年
2023年 | 12篇 |
2022年 | 5篇 |
2021年 | 12篇 |
2020年 | 16篇 |
2019年 | 18篇 |
2018年 | 23篇 |
2017年 | 19篇 |
2016年 | 17篇 |
2015年 | 16篇 |
2014年 | 32篇 |
2013年 | 61篇 |
2012年 | 31篇 |
2011年 | 53篇 |
2010年 | 36篇 |
2009年 | 55篇 |
2008年 | 70篇 |
2007年 | 57篇 |
2006年 | 51篇 |
2005年 | 46篇 |
2004年 | 31篇 |
2003年 | 45篇 |
2002年 | 46篇 |
2001年 | 31篇 |
2000年 | 38篇 |
1999年 | 32篇 |
1998年 | 28篇 |
1997年 | 23篇 |
1996年 | 29篇 |
1995年 | 10篇 |
1994年 | 12篇 |
1993年 | 8篇 |
1992年 | 6篇 |
1991年 | 8篇 |
1990年 | 8篇 |
1989年 | 4篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 7篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1977年 | 4篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1936年 | 1篇 |
排序方式: 共有1026条查询结果,搜索用时 562 毫秒
121.
D. V. Gorbachev 《Mathematical Notes》1997,61(4):430-439
For a functional on the classH
ω
(n)
,n≥3, we construct the extremal function on which the upper bound obtained by A. I. Stepanets is attained.
Translated fromMatematicheskie Zametki, Vol. 61, No. 4, pp. 519–529, April, 1997.
Translated by N. K. Kulman 相似文献
122.
Izidor Gertner 《Stochastic Processes and their Applications》1978,7(3):231-246
The structure of a nonlinear filter with observation process having continuous and discontinuous components is considered. The approach is based on the so-called “Bayes” formula for conditional expectations. “Fubini” type theorems for stochastic integrals are given and used to obtain the representations of an optimal estimate and of the conditional likelihood ratio. A linear unnormalized filtering equation for controlled system process is derived. 相似文献
123.
On Vector Variational Inequalities in Reflexive Banach Spaces 总被引:5,自引:0,他引:5
In this paper, we study the solvability for a class of vector variational inequalities in reflexive Banach spaces. By using
Brouwer fixed point theorem, we prove the solvability for this class of vector variational inequalities without monotonicity
assumption. The solvability results for this class of vector variational inequalities with monotone mappings are also presented
by using the KKM-Fan lemma
This paper is dedicated to Professor Franco Giannessi for his 68th birthday 相似文献
124.
It is known that the Banach completion Y = bX of a normed lattice X need not preserve the properties to be Dedekind complete or σ-Dedekind complete. In this paper it is proved that the countable
interpolation property and the property to be sequentially order complete are preserved under the Banach completion. To prove
this results we found some sufficient conditions (which are close to necessary ones) on X which secure for Y to have the countable interpolation property and (respectively) to be sequentially order complete. These conditions are obtained
with the help of the newly developed techniques based on representations of normed lattices. It is well known that order continuity,
and σ-order continuity of a norm are preserved under the Banach completion. Here necessary and sufficient conditions on X to secure these properties in Y are discussed.
Mathematics Subject Classification 2000: 46B42, 46E15 相似文献
125.
We are interested in the laws of multiple stable stochastic integrals defined
by LePage series representation in references(3,10,11). We continue the study
started in Ref. 3 and give conditions ensuring absolute continuity of joint
laws of stable integrals. To this end, we apply a stratification method on the
Skorohod space on which we first take back the problem. 相似文献
126.
127.
Petar S. Kenderov Warren B. Moors 《Proceedings of the American Mathematical Society》2006,134(5):1503-1512
In this paper we prove a theorem more general than the following. Suppose that is Lindelöf and -favourable and is Lindelöf and Cech-complete. Then for each separately continuous function there exists a residual set in such that is jointly continuous at each point of .
128.
Serife Nur Deveci Tuncer Acar Osman Alagoz 《Mathematical Methods in the Applied Sciences》2020,43(5):2772-2782
In this study, we introduce newly defined Gamma operators which preserve constants and e2μ·, μ>0 functions. In accordance with this purpose, we focus on their approximation properties such as uniform convergence, rate of convergence, asymptotic formula, and saturation results. Superior properties of introduced operators have been tested both theoretically and numerically in certain senses to highlight the performance of the new constructions of Gamma operators. 相似文献
129.
Trapti Neer Ana Maria Acu P.N. Agrawal 《Mathematical Methods in the Applied Sciences》2020,43(6):2911-2923
In this paper, we define the Baskakov-Durrmeyer type operators based on generalized Appell polynomials. Here, we establish moment estimates, an estimate via weighted modulus of continuity and a Voronovoskaya type asymptotic result. Further, we study a quantitative-Voronovoskaya-type theorem and Grüss Voronovskaya-type theorem. Lastly, we give the approximation result for functions having derivatives of bounded variation. 相似文献
130.