全文获取类型
收费全文 | 316篇 |
免费 | 42篇 |
国内免费 | 23篇 |
专业分类
化学 | 208篇 |
力学 | 16篇 |
综合类 | 8篇 |
数学 | 130篇 |
物理学 | 19篇 |
出版年
2023年 | 6篇 |
2022年 | 7篇 |
2021年 | 19篇 |
2020年 | 14篇 |
2019年 | 13篇 |
2018年 | 17篇 |
2017年 | 16篇 |
2016年 | 14篇 |
2015年 | 22篇 |
2014年 | 24篇 |
2013年 | 41篇 |
2012年 | 15篇 |
2011年 | 18篇 |
2010年 | 5篇 |
2009年 | 7篇 |
2008年 | 15篇 |
2007年 | 15篇 |
2006年 | 13篇 |
2005年 | 8篇 |
2004年 | 5篇 |
2003年 | 10篇 |
2002年 | 18篇 |
2001年 | 6篇 |
2000年 | 9篇 |
1999年 | 7篇 |
1998年 | 6篇 |
1997年 | 1篇 |
1996年 | 5篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1986年 | 4篇 |
1984年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1977年 | 1篇 |
排序方式: 共有381条查询结果,搜索用时 15 毫秒
41.
Pengfei Xu Jianhua Huang Guangan Zou 《Mathematical Methods in the Applied Sciences》2019,42(11):3818-3830
This paper is devoted to the well‐posedness for time‐space fractional Ginzburg‐Landau equation and time‐space fractional Navier‐Stokes equations by α‐stable noise. The spatial regularity and the temporal regularity of the nonlocal stochastic convolution are firstly established, and then the existence and uniqueness of the global mild solution are obtained by the Banach fixed point theorem and Mittag‐Leffler functions, respectively. Numerical simulations for time‐space fractional Ginzburg‐Landau equation are provided to verify the analysis results. 相似文献
42.
We consider a class of differential–algebraic equations (DAEs) with index zero in an infinite dimensional Hilbert space. We define a space of consistent initial values, which lead to classical continuously differential solutions for the associated DAE. Moreover, we show that for arbitrary initial values we obtain mild solutions for the associated problem. We discuss the asymptotic behaviour of solutions for both problems. In particular, we provide a characterisation for exponential stability and exponential dichotomies in terms of the spectrum of the associated operator pencil. 相似文献
43.
Wang Lianglong 《Annals of Differential Equations》2007,23(4):499-504
This paper is concerned with the global existence of solutions for abstract retarded functional differential equations (RFDEs) with infinite delay,via a fixed point approach.Some sufficient conditions are established under which the existence of a globally mild solution are obtained by using Leray-Schauder. 相似文献
44.
Masayuki Karato 《Mathematical Logic Quarterly》2005,51(3):305-312
Generalizing a result of Todor?evi?, we prove the existence of directed sets D, E such that D ? ??κλ and E ? ??κλ but D × E ≥ ??κλ in the Tukey ordering. As an application, we show that the tree property for directed sets introduced by Hinnion is not preserved under products. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
45.
46.
In this paper, we are concerned with a class of abstract second-order nonlocal Cauchy problem with impulsive conditions in Banach spaces. First, we study the existence of mild solutions for a class of second-order nonlocal Cauchy problem with impulsive conditions in Banach spaces on an interval [0,a]. Later, we study a couple of cases where we can establish the existence of global solutions for a class of abstract second-order nonlocal Cauchy problem with impulsive conditions in Banach spaces. We apply our theory to study the existence of solutions for impulsive partial differential equations. 相似文献
47.
In this paper we present some results of global existence and attrac-tivity of mild solutions for semilinear evolution equations with innitedelay in a Banach space. The considerations of this paper are basedon the Schauder's xed point theorem and the theory of evolutionsystem. 相似文献
48.
49.
研究了一类带有非局部条件二阶微分包含的可控性,在多值函数F(t,x)取凸情形下讨论了上述问题,建立了可控性的充分条件.本文将所讨论的问题转化为集值积分算子的不动点问题,利用Kakutani不动点定理得到可控性. 相似文献
50.
In this paper, we study the higher‐order semilinear parabolic equation where m, p>1 and $a\,\in\,\mathbb{R}$. For p>1+2m/N, we prove that the global existence of mild solutions for small initial data with respect to some norm. Some of those solutions are proved to be asymptotic self‐similar. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献