全文获取类型
收费全文 | 493025篇 |
免费 | 4313篇 |
国内免费 | 1489篇 |
专业分类
化学 | 255764篇 |
晶体学 | 7680篇 |
力学 | 22290篇 |
综合类 | 11篇 |
数学 | 59054篇 |
物理学 | 154028篇 |
出版年
2021年 | 4295篇 |
2020年 | 4637篇 |
2019年 | 5221篇 |
2018年 | 7197篇 |
2017年 | 7349篇 |
2016年 | 10129篇 |
2015年 | 5834篇 |
2014年 | 9659篇 |
2013年 | 22797篇 |
2012年 | 17317篇 |
2011年 | 20803篇 |
2010年 | 15278篇 |
2009年 | 15136篇 |
2008年 | 19120篇 |
2007年 | 19177篇 |
2006年 | 17732篇 |
2005年 | 15668篇 |
2004年 | 14358篇 |
2003年 | 12839篇 |
2002年 | 12742篇 |
2001年 | 14570篇 |
2000年 | 11047篇 |
1999年 | 8563篇 |
1998年 | 7211篇 |
1997年 | 7111篇 |
1996年 | 6649篇 |
1995年 | 5679篇 |
1994年 | 5705篇 |
1993年 | 5631篇 |
1992年 | 6089篇 |
1991年 | 6362篇 |
1990年 | 6048篇 |
1989年 | 5945篇 |
1988年 | 5707篇 |
1987年 | 5772篇 |
1986年 | 5514篇 |
1985年 | 7072篇 |
1984年 | 7230篇 |
1983年 | 5968篇 |
1982年 | 6266篇 |
1981年 | 5925篇 |
1980年 | 5702篇 |
1979年 | 6156篇 |
1978年 | 6262篇 |
1977年 | 6254篇 |
1976年 | 6226篇 |
1975年 | 5875篇 |
1974年 | 5800篇 |
1973年 | 5999篇 |
1972年 | 4176篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
A. E. Dorokhov 《Czechoslovak Journal of Physics》2002,52(3):C79-C90
Nonperturbative nolocal structure of QCD vacuum is well described by instanton model. Specific helicity and flavor structure of zero modes of quarks, in instanton field allows simultaneously to explain some important features of low-and high-energy hadron phenomemology. The basic characteristics of hadron spectrum, partonic sum rules, heavyquark potential etc within the instanton liquid model are briefly discussed. 相似文献
22.
23.
The simple relation between representations of the covering groups of SL2 and GL2 makes it possible to fuse and extend the recent metaplectic results of Shimura, Waldspurger, Flicker, and ourselves. By giving a new (purely local andL-function theoretic) treatment of the Waldspurger-Shintani correspondence, we also simplify some of Waldspurger’s original results. 相似文献
24.
25.
26.
27.
We consider the growth of a spherical crystal in a supersaturatedsolution. In the first part, existence and uniqueness resultsfor radially symmetric growth are obtained, provided that thesupersaturation is not too large; conversely, when the far-fieldsupersaturation exceeds a critical value, it is shown that theradially symmetric solution ceases to exist in finite time.In the second part, we examine the linear stability of a radiallysymmetric similarity solution (in which the radius grows ast?) to shape perturbations. The results are compared with previousquasi-static analyses, and, in particular, the critical radiusat which the crystal becomes unstable is found to be largerfor small supersaturations, but smaller for large supersaturations,than those predicted by the quasi-static analysis 相似文献
28.
29.
The main result of the paper is a theorem, using which a new proof of Roth’s theorem is obtained, a new solvability criterion
for the matrix equation AX-YB = C is proved, a formula for a particular solution of the latter is derived, and the least of
the orders of square nonsingular matrices containing a given rectangular matrix as a submatrix is determined. Bibliography:
5 titles.
__________
Translated from Zapiski Nauchnykh Seminarov POMI, Vol. 323, 2005, pp. 15–23. 相似文献
30.
Using the method of the tensor Green’s function of the wave equation, the differential and total cross sections for the scattering of surface optical electromagnetic waves (surface plasmon polaritons) by a spherical nanoparticle into surface plasmon polaritons and light have been obtained with the inclusion of the magnetic dipole contribution. Using the example of noble metal systems, it has been shown that the magnetic dipole contribution may significantly affect the angular dependence of the differential cross sections and increase their anisotropy as the plasmon wavelength increases. 相似文献