全文获取类型
收费全文 | 185篇 |
免费 | 0篇 |
专业分类
化学 | 85篇 |
晶体学 | 1篇 |
力学 | 11篇 |
数学 | 20篇 |
物理学 | 68篇 |
出版年
2021年 | 3篇 |
2019年 | 2篇 |
2018年 | 2篇 |
2017年 | 5篇 |
2015年 | 2篇 |
2014年 | 6篇 |
2013年 | 9篇 |
2012年 | 10篇 |
2011年 | 8篇 |
2010年 | 7篇 |
2009年 | 8篇 |
2008年 | 6篇 |
2007年 | 8篇 |
2006年 | 8篇 |
2005年 | 7篇 |
2004年 | 1篇 |
2003年 | 3篇 |
2002年 | 1篇 |
2001年 | 1篇 |
2000年 | 4篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 3篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 3篇 |
1986年 | 3篇 |
1984年 | 4篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1981年 | 4篇 |
1980年 | 4篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1974年 | 7篇 |
1973年 | 5篇 |
1972年 | 3篇 |
1971年 | 2篇 |
1970年 | 7篇 |
1967年 | 5篇 |
1966年 | 1篇 |
1964年 | 1篇 |
排序方式: 共有185条查询结果,搜索用时 15 毫秒
61.
62.
A. Yu Pilipenko 《Ukrainian Mathematical Journal》1996,48(4):623-630
We construct a differential operator by an admissible group in the space L 2 (?m,P)and study its properties. 相似文献
63.
A. Yu. Pilipenko 《Ukrainian Mathematical Journal》2005,57(8):1262-1274
We consider the properties of a random set ϕ
t
(ℝ
+
d
), where ϕ
t
(x) is a solution of a stochastic differential equation in ℝ
+
d
with normal reflection from the boundary that starts from a point x. We characterize inner and boundary points of the set ϕ
t
(ℝ
+
d
) and prove that the Hausdorff dimension of the boundary ∂ϕ
t
(ℝ
+
d
) does not exceed d − 1.
__________
Translated from Ukrains'kyi Matematychnyi Zhurnal, Vol. 57, No. 8, pp. 1069 – 1078, August, 2005. 相似文献
64.
65.
66.
67.
68.
L. F. Atyaksheva O. S. Pilipenko O. M. Poltorak E. S. Chukhrai 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2007,81(7):1156-1159
It was shown that the presence of magnesium cations in the reaction mixture increases, approximately twofold, the activity of bacterial Escherichia coli and yeast Kluyveromyces lactis β-galactosidases but does not affect the activity of bovine liver and fungous Penicillium canescens β-galactosidases. The catalytic constants for E. coli and yeast K. lactis β-galactosidases in the presence of 0.01 M and in the absence of Mg2+ cations were determined (490 and 220 s?1 and 59.8 and 37.4 s?1, respectively). It was shown that the Michaelis constants for these two enzymes are higher in the presence of Mg2+ cations, that the thermal stability of E. coli and K. Lactis β-galactosidases is higher in the presence of 0.01 M Mg2+, and that the effective rate constants of thermal inactivation of the enzymes are two-to eightfold lower, depending on conditions, in the presence of Mg2+ cations. The maximum stabilizing effect of magnesium cations was observed at weak alkaline pH values (7.5–8.5). 相似文献
69.
O. S. Pilipenko L. F. Atyaksheva O. M. Poltorak E. S. Chukhrai 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2007,81(6):990-994
The dissociation of oligomer forms of bacterial Escherichia coli, yeast Kluyveromices fragilis, and bovine liver β-galactosidases was studied. The catalytic constants for the dimers and tetramers of the bacterial enzyme, dimers and monomers of the animal enzyme, and dimers of the yeast enzyme in the reaction of hydrolysis of 2-nitrophenyl-β-D-galactopyranoside were determined. At 25°C, these values were found to be 180 and 400 s?1 for the bacterial enzyme, 0.01 and 0.08 s?1 for the bovine liver enzyme, and 45.4 s?1 for the yeast enzyme, respectively. The other oligomer forms of the β-galactosidases were inactive under conditions of these experiments. 相似文献
70.
A sharp interface model of crack propagation as a phase transition process is discussed. We develop a multipole expansion technique to solve this free boundary problem numerically. We obtain steady state solutions with a self-consistently selected propagation velocity and shape of the crack, provided that elastodynamic effects are taken into account. Also, we find a saturation of the steady state crack velocity below the Rayleigh speed, tip blunting with increasing driving force, and a tip splitting instability above a critical driving force. 相似文献