全文获取类型
收费全文 | 1472篇 |
免费 | 30篇 |
国内免费 | 1篇 |
专业分类
化学 | 1158篇 |
晶体学 | 5篇 |
力学 | 14篇 |
数学 | 185篇 |
物理学 | 141篇 |
出版年
2021年 | 19篇 |
2020年 | 13篇 |
2019年 | 23篇 |
2017年 | 15篇 |
2016年 | 24篇 |
2015年 | 29篇 |
2014年 | 36篇 |
2013年 | 37篇 |
2012年 | 48篇 |
2011年 | 64篇 |
2010年 | 43篇 |
2009年 | 40篇 |
2008年 | 41篇 |
2007年 | 45篇 |
2006年 | 53篇 |
2005年 | 46篇 |
2004年 | 42篇 |
2003年 | 43篇 |
2002年 | 49篇 |
2001年 | 25篇 |
2000年 | 24篇 |
1999年 | 30篇 |
1998年 | 21篇 |
1997年 | 24篇 |
1996年 | 21篇 |
1995年 | 25篇 |
1994年 | 29篇 |
1993年 | 13篇 |
1992年 | 25篇 |
1991年 | 20篇 |
1990年 | 15篇 |
1989年 | 17篇 |
1988年 | 13篇 |
1987年 | 25篇 |
1986年 | 24篇 |
1985年 | 28篇 |
1984年 | 30篇 |
1982年 | 23篇 |
1981年 | 15篇 |
1980年 | 28篇 |
1979年 | 23篇 |
1978年 | 25篇 |
1977年 | 23篇 |
1976年 | 24篇 |
1975年 | 29篇 |
1974年 | 35篇 |
1973年 | 34篇 |
1972年 | 25篇 |
1971年 | 11篇 |
1970年 | 14篇 |
排序方式: 共有1503条查询结果,搜索用时 15 毫秒
141.
Armin Ferse 《Journal of Solid State Electrochemistry》2011,15(10):2173-2175
The arguments of Malatesta (J Solution Chem 29:771–779, 2000; Fluid Phase Equil 295:244–248, 2010) exclude the experimental determination of individual ion activity coefficients. I agree that a measurement of single-ion
activity coefficients is impossible. But the comment of Malatesta (J Solid State Electrochem (in press), 2011) in the connection with the purely mathematical procedure developed by Ferse and Müller (J Solid State Electrochem (in press),
2011) is senseless because there is no new aspect which is not also given in the paper of Ferse and Müller (J Solid State Electrochem
(in press), 2011). All of the mentioned problems are already discussed and clarified in the publication by Ferse and Müller (J Solid State
Electrochem (in press), 2011). The purely mathematical method is a possibility to obtain the concentration functions for the individual activity coefficients
of the complementary ion species by factorizing a product function of the experimentally accessible concentration dependence
of the mean activity coefficients to the required power. 相似文献
142.
Armin Ferse 《Journal of Solid State Electrochemistry》2011,15(10):2177-2184
The concentration curve of mean activity coefficient to the required power was fitted by a product function. The product function
can be factorized in factor functions which represent the concentration dependence of the single-ion species (J Solid State
Electrochem, in press, 1). With a simplified procedure of this method, it is possible to split the mean activity coefficients into the individual
parts for the ionic species within the extended Debye–Hückel concentration range. This method is applicable to all strong
electrolytes because it is not necessary to have further data or additional assumptions. 相似文献
143.
Realization of a Framework for Simulation-Based Large-Scale Shape Optimization Using Vertex Morphing
Ghantasala Aditya Najian Asl Reza Geiser Armin Brodie Andrew Papoutsis Efthymios Bletzinger Kai-Uwe 《Journal of Optimization Theory and Applications》2021,189(1):164-189
Journal of Optimization Theory and Applications - There is a significant tendency in the industry for automation of the engineering design process. This requires the capability of analyzing an... 相似文献
144.
Auer Peter Dósa György Dulai Tibor Fügenschuh Armin Näser Peggy Ortner Ronald Werner-Stark Ágnes 《Central European Journal of Operations Research》2021,29(3):1079-1113
Central European Journal of Operations Research - We deal with a very complex and hard scheduling problem. Two types of products are processed by a heterogeneous resource set, where resources have... 相似文献
145.
Georgios Papazoglou Jorge Sierra Katharina Homberger Armin Guggisberg Wolf-Dietrich Woggon Manfred Hesse 《Helvetica chimica acta》1991,74(3):565-571
Aphelandrine ( 1 ) is shown to be biosynthesized in the root cells of Aphelandra tetragona (VAHL ) NEES from labelled putrescine ( 4 ), spermidine ( 5 ), and cinnamic acid ( 3 ). Whether spermine ( 6 ) and the (p-hydroxycinnamoyl)spermidine 8 are precursors of 1 is uncertain, since the latter is hydrolysed to a large extent before incorporation, and the former is metabolized to 4 and 5 . Methionine ( 7 ) is the source of the 3-aminopropyl unit of 5 and 6 . 相似文献
146.
147.
148.
149.