全文获取类型
收费全文 | 1027篇 |
免费 | 10篇 |
国内免费 | 1篇 |
专业分类
化学 | 617篇 |
晶体学 | 10篇 |
力学 | 16篇 |
数学 | 130篇 |
物理学 | 265篇 |
出版年
2022年 | 13篇 |
2021年 | 22篇 |
2020年 | 32篇 |
2019年 | 10篇 |
2018年 | 31篇 |
2017年 | 22篇 |
2016年 | 28篇 |
2015年 | 17篇 |
2014年 | 19篇 |
2013年 | 34篇 |
2012年 | 44篇 |
2011年 | 53篇 |
2010年 | 45篇 |
2009年 | 46篇 |
2008年 | 30篇 |
2007年 | 33篇 |
2006年 | 28篇 |
2005年 | 23篇 |
2004年 | 24篇 |
2003年 | 23篇 |
2002年 | 28篇 |
2001年 | 18篇 |
2000年 | 22篇 |
1999年 | 10篇 |
1998年 | 12篇 |
1997年 | 17篇 |
1996年 | 9篇 |
1995年 | 19篇 |
1994年 | 12篇 |
1993年 | 14篇 |
1992年 | 20篇 |
1991年 | 23篇 |
1990年 | 20篇 |
1989年 | 24篇 |
1988年 | 17篇 |
1987年 | 17篇 |
1986年 | 13篇 |
1985年 | 22篇 |
1984年 | 10篇 |
1983年 | 6篇 |
1982年 | 8篇 |
1981年 | 13篇 |
1980年 | 8篇 |
1979年 | 9篇 |
1978年 | 8篇 |
1977年 | 7篇 |
1976年 | 17篇 |
1975年 | 10篇 |
1974年 | 14篇 |
1968年 | 8篇 |
排序方式: 共有1038条查询结果,搜索用时 31 毫秒
121.
A. T. Guseinova K. I. Alieva I. A. Rzaeva A. M. Magerramov I. A. Aliev V. M. Farzaliev M. A. Allakhverdiev 《Russian Journal of Applied Chemistry》2009,82(9):1587-1591
1-Amino-4-phenyl-2-butanethiols were synthesized and characterized and their antioxidant activity in auto-oxidation of cumene
and in their reaction with cumyl peroxide radicals and cumyl hydroperoxide was studied. 相似文献
122.
Gadzhizade S. M. Dzhamalova S. A. Aliev N. A. Kasimov A. A. 《Russian Journal of Applied Chemistry》2009,82(5):880-883
Russian Journal of Applied Chemistry - Effect of the C3H8 dehydrogenation temperature (560–650°C) and oxygen on the rates of C3H8 conversion and C3H6 formation was studied using a... 相似文献
123.
N. A. Aliev M. G. Levkovich E. L. Kristallovich N. D. Abdullaev V. G. Kartsev 《Chemistry of Heterocyclic Compounds》1999,35(1):84-86
Studies have been made on the reactions of 2,3-dihydrooxazolo[4,5-b]pyridin-2-thione and of its potassium and sodium salts with methylating agents under various conditions.See [1] for Part 1.Plant Substance Chemistry Institute, Uzbekistan Academy of Sciences, Tashkent 700170. Organic Nitrogen Technology Association, Interbioskrin, Moscow a/ya 218, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 87–89, January, 1999. 相似文献
124.
Tlili Iskander Hamadneh Nawaf N. Khan Waqar A. Atawneh Samer 《Journal of Thermal Analysis and Calorimetry》2018,132(3):1899-1912
Journal of Thermal Analysis and Calorimetry - This study will focus on the first- and second-law analyses of MHD Couette–Poiseuille flow of water-based nanofluids in a rotating permeable... 相似文献
125.
The problems of motion of fluids, gases and gas–liquid mixtures in pipes related to gas-lift oil recovery are mathematically
formulated as systems of nonlinear hyperbolic partial differential equations. Optimal-control problems are posed based on
the proposed models and some real assumptions. These problems can be used to design programmed paths and controls, which underlie
the controllers that stabilize the pressure or volume of injected gas. That the mathematical models agree with available field
and laboratory data is demonstrated by examples 相似文献
126.
V. V. Khalturina Yu. V. Shklyaev Z. G. Aliev A. N. Maslivets 《Russian Journal of Organic Chemistry》2010,46(4):539-542
5-Arylfuran-2,3-diones react with (Z)-2-[3,3-dimethyl-3,4-dihydroisoquinolin-1(2H)-ylidene]acetamides to give (3E,5Z)-5-(2-aryl-2-oxoethylidene)-3-[3,3-dimethyl-3,4-dihydroisoquinolin-1(2H)-ylidene]-pyrrolidine-2,4-diones. The crystalline and molecular structures of one of the products were determined by X-ray
analysis. 相似文献
127.
128.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 52, No. 3, pp. 429–434, March, 1990. 相似文献
129.
T.M. Aliev O. Özcan M. Savci 《The European Physical Journal C - Particles and Fields》2003,27(3):447-452
We study the possibility of detecting non-commutative QED through neutral Higgs boson pair production at a collider. This is based on the assumption that H0 interacts directly with the photon as suggested by symmetry considerations. The sensitivity of the cross-section to the non-commutative
scale and the Higgs mass is investigated.
Received: 28 August 2002 / Revised version: 15 November 2002 / Published online: 19 February 2003 相似文献
130.