全文获取类型
收费全文 | 1341771篇 |
免费 | 29792篇 |
国内免费 | 7661篇 |
专业分类
化学 | 674136篇 |
晶体学 | 14103篇 |
力学 | 74418篇 |
综合类 | 111篇 |
数学 | 242014篇 |
物理学 | 374442篇 |
出版年
2021年 | 12939篇 |
2020年 | 15952篇 |
2019年 | 16086篇 |
2016年 | 27646篇 |
2015年 | 20758篇 |
2014年 | 30518篇 |
2013年 | 74610篇 |
2012年 | 39732篇 |
2011年 | 37037篇 |
2010年 | 37048篇 |
2009年 | 39116篇 |
2008年 | 36089篇 |
2007年 | 31680篇 |
2006年 | 38970篇 |
2005年 | 30319篇 |
2004年 | 31714篇 |
2003年 | 29749篇 |
2002年 | 30926篇 |
2001年 | 31507篇 |
2000年 | 24196篇 |
1999年 | 20933篇 |
1998年 | 19105篇 |
1997年 | 19672篇 |
1996年 | 19312篇 |
1995年 | 18645篇 |
1994年 | 18164篇 |
1993年 | 17673篇 |
1992年 | 18073篇 |
1991年 | 18289篇 |
1990年 | 17513篇 |
1989年 | 17490篇 |
1988年 | 17163篇 |
1987年 | 17076篇 |
1986年 | 16014篇 |
1985年 | 22471篇 |
1984年 | 23682篇 |
1983年 | 19676篇 |
1982年 | 21377篇 |
1981年 | 20558篇 |
1980年 | 19846篇 |
1979年 | 20323篇 |
1978年 | 21548篇 |
1977年 | 21243篇 |
1976年 | 20991篇 |
1975年 | 19715篇 |
1974年 | 19407篇 |
1973年 | 19885篇 |
1972年 | 14392篇 |
1968年 | 12405篇 |
1967年 | 12761篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
Danilov Felix I. Bogdanov Dmytro A. Smyrnova Olena V. Korniy Sergiy A. Protsenko Vyacheslav S. 《Journal of Solid State Electrochemistry》2022,26(4):939-957
Journal of Solid State Electrochemistry - The electrochemical deposition of a nickel–iron alloy from a plating solution based on a deep eutectic solvent (a eutectic mixture of ethylene glycol... 相似文献
62.
Theoretical and Mathematical Physics - An Erratum to this paper has been published: https://doi.org/10.1134/S0040577922060034 相似文献
63.
Computational Optimization and Applications - We consider a continuous-time optimization method based on a dynamical system, where a massive particle starting at rest moves in the conservative... 相似文献
64.
Lakshminarayana B. N. Sreenatha N. R. Jeevan Chakravarthy A. S. Suchithra B. Hariprasad S. 《Crystallography Reports》2022,67(2):201-208
Crystallography Reports - The molecular structure of 2-chloro-3-(1'-napthyl)-5,5-dimethyl-2- cyclohexenone was determined by single crystal X-ray diffraction. The compound crystallized in a... 相似文献
65.
Zmushko V. V. Razin A. N. Sinelnikova A. A. 《Journal of Applied Mechanics and Technical Physics》2022,63(3):400-407
Journal of Applied Mechanics and Technical Physics - Turbulent mixing at interfaces of three-layer gas systems after shock-wave passage has been studied. The influence of the initial roughness of... 相似文献
66.
Applied Mathematics and Mechanics - Mechanical models of residually stressed fibre-reinforced solids, which do not resist bending, have been developed in the literature. However, in some residually... 相似文献
67.
Computational Management Science - We study different parallelization schemes for the stochastic dual dynamic programming (SDDP) algorithm. We propose a taxonomy for these parallel algorithms,... 相似文献
68.
Journal of Analytical Chemistry - The review considers the historical aspects of the formation and development of bioelectrochemistry and some issues of the analytical application of... 相似文献
69.
Russian Chemical Bulletin - The N-methylation of primary carboxamides is based on two consecutive reactions. The silylation of the corresponding carboxamides with chloro(chloromethyl)dimethylsilane... 相似文献
70.
Megha Sen Chowdhury Dr. Selcuk Gumus Dr. Sanchari Dasgupta Dr. Ishani Majumder Dr. Abir Bhattacharya Dr. Debasis Das Dr. Jayanta Mukhopadhyay Dr. Debosreeta Bose Dr. Saumya Dasgupta Dr. Yuksel Akinay Dr. Madhumita Mukhopadhyay 《ChemistryOpen》2022,11(6):e202200033
We report, for the first time, a detailed crystallographic study of the supramolecular arrangement for a set of zinc(II) Schiff base complexes containing the ligand 2,6-bis((E)-((2-(dimethylamino)ethyl)imino)methyl)-4-R-phenol], where R=methyl/tert-butyl/chloro. The supramolecular study acts as a pre-screening tool for selecting the compartmental ligand R of the Schiff base for effective binding with a targeted protein, bovine serum albumin (BSA). The most stable hexagonal arrangement of the complex [Zn − Me] (R=Me) stabilises the ligand with the highest FMO energy gap (ΔE=4.22 eV) and lowest number of conformations during binding with BSA. In contrast, formation of unstable 3D columnar vertebra for [Zn − Cl] (R=Cl) tend to activate the system with lowest FMO gap (3.75 eV) with highest spontaneity factor in molecular docking. Molecular docking analyses reported in terms of 2D LigPlot+ identified site A, a cleft of domains IB, IIIA and IIIB, as the most probable protein binding site of BSA. Arg144, Glu424, Ser428, Ile455 and Lys114 form the most probable interactions irrespective of the type of compartmental ligands R of the Schiff base whereas Arg185, Glu519, His145, Ile522 act as the differentiating residues with ΔG=−7.3 kcal mol−1. 相似文献