全文获取类型
收费全文 | 381篇 |
免费 | 41篇 |
国内免费 | 15篇 |
专业分类
化学 | 30篇 |
力学 | 21篇 |
综合类 | 5篇 |
数学 | 328篇 |
物理学 | 53篇 |
出版年
2023年 | 1篇 |
2022年 | 7篇 |
2021年 | 7篇 |
2020年 | 7篇 |
2019年 | 6篇 |
2018年 | 11篇 |
2017年 | 10篇 |
2016年 | 12篇 |
2015年 | 3篇 |
2014年 | 24篇 |
2013年 | 50篇 |
2012年 | 14篇 |
2011年 | 12篇 |
2010年 | 17篇 |
2009年 | 14篇 |
2008年 | 13篇 |
2007年 | 22篇 |
2006年 | 21篇 |
2005年 | 13篇 |
2004年 | 16篇 |
2003年 | 12篇 |
2002年 | 18篇 |
2001年 | 15篇 |
2000年 | 20篇 |
1999年 | 14篇 |
1998年 | 17篇 |
1997年 | 13篇 |
1996年 | 11篇 |
1995年 | 6篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 3篇 |
1985年 | 4篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有437条查询结果,搜索用时 46 毫秒
91.
92.
The method of reconstruction of complete deterministic Mueller matrices for the structures of incomplete matrices, which are measured in the method of three input polarizations, has been developed. The method is based on reconstruction of the corresponding Jones matrices for the given structures of incomplete Mueller matrices. 相似文献
93.
An orderly algorithm combined with clique searching is used to show that there are—up to isomorphism, in all cases—325,062 resolvable 2-(16,4,2) designs with 339,592 resolutions, 19,072,802 2-(13,6,5) designs, and 15,111,019 2-(14,7,6) designs. Properties of the classified designs are further discussed. 相似文献
94.
Arlene A. Pascasio Cheryl E. Praeger Blessilda P. Raposa 《Designs, Codes and Cryptography》1996,8(1-2):173-179
We show that a non-symmetric nearly triply regular
designD with
and in which every line has at least q points is AG(n,q) for prime power q > 2 and positiveinteger n 3. 相似文献
95.
B. G. S. Doman. 《Mathematics of Computation》1996,65(215):1283-1288
A new asymptotic expansion is derived for the incomplete beta function , which is suitable for large , small and . This expansion is of the form
where is the incomplete Gamma function ratio and . This form has some advantages over previous asymptotic expansions in this region in which depends on as well as on and .
96.
97.
We consider multistage group testing with incomplete identification and unreliability features. The objective is to find a cost‐efficient group testing policy to select a prespecified number of non‐defective items from some population in the presence of false‐positive and false‐negative test results, subject to reliability and other constraints. To confirm the status of tested groups, various sequential retesting procedures are suggested. We also extend the model to include the possibility of inconclusive test results. We derive all relevant cost functionals in analytically closed form. Numerical examples are also given. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
98.
Jinhua Wang 《Designs, Codes and Cryptography》2006,38(3):373-381
The necessary condition for the existence of a (ν, 3× 3,1)-splitting BIBD is ν ≡ 1 (mod 54). In this paper, we show that the
necessary condition is also sufficient with one possible exception of ν = 55. As its application, we obtain a new infinite
class of optimal 3-splitting authentication codes.
AMS Classification: 05B05, 94A62
An erratum to this article is available at . 相似文献
99.
Jérôme Renault 《International Journal of Game Theory》2001,30(2):221-245
We study the existence of uniform equilibria for three-player repeated games with lack of information on one side and perfect
observation. If there are only two states of nature, a completely revealing or a joint plan equilibrium always exists. This
is not the case for larger spaces of states.
Final version June 2001 相似文献
100.
We consider the heat operator acting on differential forms on spaces with complete and incomplete edge metrics. In the latter case we study the heat operator of the Hodge Laplacian with algebraic boundary conditions at the edge singularity. We establish the mapping properties of the heat operator, recovering and extending the classical results from smooth manifolds and conical spaces. The estimates, together with strong continuity of the heat operator, yield short‐time existence of solutions to certain semilinear parabolic equations. Our discussion reviews and generalizes earlier work by Jeffres and Loya. 相似文献