全文获取类型
收费全文 | 17479篇 |
免费 | 2326篇 |
国内免费 | 1392篇 |
专业分类
化学 | 1908篇 |
晶体学 | 103篇 |
力学 | 3334篇 |
综合类 | 222篇 |
数学 | 8868篇 |
物理学 | 6762篇 |
出版年
2024年 | 32篇 |
2023年 | 178篇 |
2022年 | 241篇 |
2021年 | 286篇 |
2020年 | 448篇 |
2019年 | 408篇 |
2018年 | 458篇 |
2017年 | 493篇 |
2016年 | 590篇 |
2015年 | 479篇 |
2014年 | 755篇 |
2013年 | 1827篇 |
2012年 | 784篇 |
2011年 | 1047篇 |
2010年 | 835篇 |
2009年 | 1076篇 |
2008年 | 1144篇 |
2007年 | 1114篇 |
2006年 | 1021篇 |
2005年 | 936篇 |
2004年 | 832篇 |
2003年 | 779篇 |
2002年 | 757篇 |
2001年 | 571篇 |
2000年 | 600篇 |
1999年 | 487篇 |
1998年 | 500篇 |
1997年 | 390篇 |
1996年 | 333篇 |
1995年 | 228篇 |
1994年 | 228篇 |
1993年 | 209篇 |
1992年 | 206篇 |
1991年 | 160篇 |
1990年 | 129篇 |
1989年 | 87篇 |
1988年 | 57篇 |
1987年 | 54篇 |
1986年 | 51篇 |
1985年 | 62篇 |
1984年 | 74篇 |
1983年 | 44篇 |
1982年 | 63篇 |
1981年 | 34篇 |
1980年 | 27篇 |
1979年 | 21篇 |
1978年 | 17篇 |
1977年 | 11篇 |
1973年 | 10篇 |
1957年 | 7篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Takayuki Abe 《Mathematical Methods in the Applied Sciences》2004,27(9):1007-1048
This paper is concerned with the standard Lp estimate of solutions to the resolvent problem for the Stokes operator on an infinite layer with ‘Neumann–Dirichlet‐type’ boundary condition. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
42.
Mari Grobbelaar‐Van Dalsen 《Mathematical Methods in the Applied Sciences》2004,27(11):1301-1315
This paper is concerned with well‐posedness results for a mathematical model for the transversal vibrations of a two‐dimensional hybrid elastic structure consisting of a rectangular Reissner–Mindlin plate with a Timoshenko beam attached to its free edge. The model incorporates linear dynamic feedback controls along the interface between the plate and the beam. Classical semigroup methods are employed to show the unique solvability of the coupled initial‐boundary‐value problem. We also show that the energy associated with the system exhibits the property of strong stability. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
43.
We study the complex Ginzburg–Landau equation with zero Neumann boundary conditions on a finite interval and establish that this boundary problem (with suitably chosen parameters) has countably many stable two-dimensional self-similar tori. The case of periodic boundary conditions is also investigated. 相似文献
44.
45.
46.
Song Jiang 《Mathematische Nachrichten》1998,190(1):169-183
We consider initial boundary value problems for the equations of the one-dimensional motion of a viscous, heat-conducting gas with density-dependent viscosity that decreases (to zero) with decreasing density. We prove that if the viscosity does not decrease to zero too rapidly, then smooth solutions exist globally in time. 相似文献
47.
The purpose of this paper is to give the Reid ``Roundabout Theorem' for quadratic functionals with general boundary conditions.
In particular, we describe the so-called coupled point and regularity condition introduced in [16] in terms of Riccati equation
solutions.
Accepted 27 February 1996 相似文献
48.
I.IntroductionWhenastructurcvibratcs,itsvibratingsurfacewillmakesurroundingmediummovetogethcrwithit.Ifthernotionissofastthatthcmediumroundthestructureproduccaloca1contractionandcxpansionandthcypropagatefaraway,thesoundradiationisformed.Itispossiblctodcscribeanalytica11ytheradiationfic1dofsimplyandregularlyshapcdsourcessuchaspointsoundsourccs,spherica1soundsourccsandinflnite1engthllnearsoundsourccs,butitisa1mostimpossib1ctosolvetheradiationfiledbyanyanalyt-ica1methodforsourcesofvcrycomplicateds… 相似文献
49.
Tatsien Li 《Mathematical Methods in the Applied Sciences》2006,29(13):1543-1553
By means of a direct and constructive method based on the theory of semi‐global C2 solution, the local exact boundary observability and an implicit duality between the exact boundary controllability and the exact boundary observability are shown for 1‐D quasilinear wave equations with various boundary conditions. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
50.