全文获取类型
收费全文 | 162篇 |
免费 | 5篇 |
国内免费 | 3篇 |
专业分类
化学 | 83篇 |
晶体学 | 12篇 |
力学 | 5篇 |
数学 | 49篇 |
物理学 | 21篇 |
出版年
2023年 | 1篇 |
2022年 | 10篇 |
2021年 | 4篇 |
2020年 | 1篇 |
2019年 | 2篇 |
2018年 | 5篇 |
2017年 | 2篇 |
2016年 | 8篇 |
2015年 | 4篇 |
2014年 | 3篇 |
2013年 | 20篇 |
2012年 | 7篇 |
2011年 | 6篇 |
2010年 | 7篇 |
2009年 | 4篇 |
2008年 | 4篇 |
2007年 | 6篇 |
2006年 | 3篇 |
2005年 | 6篇 |
2004年 | 7篇 |
2003年 | 2篇 |
2002年 | 8篇 |
2001年 | 4篇 |
2000年 | 6篇 |
1999年 | 10篇 |
1998年 | 10篇 |
1997年 | 1篇 |
1996年 | 4篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 3篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
排序方式: 共有170条查询结果,搜索用时 15 毫秒
111.
112.
Strongly Gorenstein projective, injective, and flat modules 总被引:2,自引:0,他引:2
Driss Bennis 《Journal of Pure and Applied Algebra》2007,210(2):437-445
In this paper, we study a particular case of Gorenstein projective, injective, and flat modules, which we call, respectively, strongly Gorenstein projective, injective, and flat modules. These last three classes of modules give us a new characterization of the first modules, and confirm that there is an analogy between the notion of “Gorenstein projective, injective, and flat modules” and the notion of the usual “projective, injective, and flat modules”. 相似文献
113.
Loubna Tahri Driss Elgarrouj Said Zantar Mohamed Mouhib Amina Azmani Fouad Sayah 《Radiation Physics and Chemistry》2010,79(4):424-428
The increasing demand on limited water supplies has accelerated the wastewater reuse and reclamation. We investigated gamma irradiation effects on wastewater by measuring differences in the legislated parameters, aiming to reuse the wastewater. Effluents samples were collected at the urban wastewater treatment station of Tetouan and were irradiated at different doses ranging from 0 to 14 kGy using a Co60 gamma source. The results showed an elimination of bacterial flora, a decrease of biochemical and chemical oxygen demand, and higher conservation of nutritious elements. The results of this study indicated that gamma irradiation might be a good choice for the reuse of wastewater for agricultural activities. 相似文献
114.
115.
116.
Hammouda Chebbi Ahmed Driss 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(12):1369-1370
The title compound, 4-ammonio-2,2,6,6-tetramethylpiperidinium chromate dihydrate, (C9H22N2)[CrO4]·2H2O, crystallizes in the monoclinic system with one organic cation and one chromate anion in the asymmetric unit, together with three independent sites for water molecules, two of which have their O atoms located on twofold axes. The structure is composed of layers built up from CrO42− tetrahedra and water molecules alternating with C9H22N22+ cations and additional water molecules. Two types of hydrogen bonds, O—H⋯O and N—H⋯O, ensure the cohesion and stability of the structure. 相似文献
117.
118.
119.
Z. Elaoud S. Kamoun T. Mhiri A. Daoud A. Driss 《Journal of chemical crystallography》2004,34(5):337-341
The salt bis 4-benzyl piperidinium monohydrogenmonophosphate pentahydrate is orthorhombic with the following unit cell dimensions: a = 11.235(2) Å, b = 27.924(6) Å, c = 9.321(4) Å space group Pca21 with Z = 4. The structure was solved by the Patterson method and refined to final R value of 0.049 for 1802 independent reflections. The flack parameter is 0.14 with an e.s.d. of 0.23. The structure consists of infinite parallel two-dimensional [110] planes built of mutually connected ions and water molecules by strong O—H,...,O and N—H,...,O hydrogen bonding. There are no contacts other than normal van der Waals interactions between the layers. 相似文献
120.
Driss Nour El Abidine 《Annali dell'Universita di Ferrara》1990,36(1):175-183
In this paper, we are interested in a generalization of Nagata's theorem [13] to a new class of domains other than Krull domains,
the Mori domains and the PVMD domains (Theorem 1).
相似文献