全文获取类型
收费全文 | 580篇 |
免费 | 7篇 |
专业分类
电工技术 | 6篇 |
化学工业 | 79篇 |
金属工艺 | 37篇 |
机械仪表 | 28篇 |
建筑科学 | 5篇 |
矿业工程 | 1篇 |
能源动力 | 1篇 |
轻工业 | 24篇 |
水利工程 | 10篇 |
石油天然气 | 65篇 |
无线电 | 38篇 |
一般工业技术 | 110篇 |
冶金工业 | 103篇 |
原子能技术 | 36篇 |
自动化技术 | 44篇 |
出版年
2022年 | 22篇 |
2021年 | 6篇 |
2020年 | 6篇 |
2019年 | 14篇 |
2018年 | 23篇 |
2017年 | 15篇 |
2016年 | 23篇 |
2015年 | 7篇 |
2014年 | 16篇 |
2013年 | 21篇 |
2012年 | 19篇 |
2011年 | 19篇 |
2010年 | 12篇 |
2009年 | 16篇 |
2008年 | 18篇 |
2007年 | 17篇 |
2006年 | 14篇 |
2005年 | 7篇 |
2004年 | 6篇 |
2002年 | 11篇 |
2001年 | 9篇 |
1998年 | 20篇 |
1997年 | 13篇 |
1996年 | 13篇 |
1995年 | 11篇 |
1994年 | 6篇 |
1990年 | 11篇 |
1989年 | 6篇 |
1988年 | 7篇 |
1987年 | 7篇 |
1986年 | 9篇 |
1985年 | 6篇 |
1984年 | 11篇 |
1982年 | 7篇 |
1981年 | 8篇 |
1980年 | 6篇 |
1979年 | 10篇 |
1978年 | 9篇 |
1977年 | 11篇 |
1976年 | 8篇 |
1975年 | 5篇 |
1974年 | 13篇 |
1973年 | 9篇 |
1971年 | 7篇 |
1970年 | 5篇 |
1969年 | 5篇 |
1968年 | 5篇 |
1967年 | 7篇 |
1966年 | 5篇 |
1965年 | 6篇 |
排序方式: 共有587条查询结果,搜索用时 15 毫秒
51.
52.
A review of the principles of operation of quantum computers and their elements is presented. The radical advantage of quantum
algorithms for processing information over the classical ones is discussed, quantum entanglement is considered as the basic
resource of quantum computations, and the most promising and interesting proposals on realization of quantum computers on
the basis of trapped ions, nuclear spins, quantum dots, superconducting structures, and others are described. This review
reflects the materials of the report presented at the scientific session of the Department of Nanotechnologies and Information
Technologies of the Russian Academy of Sciences on February 25, 2010. 相似文献
53.
S. G. Bogdanov N. V. Mushnikov P. B. Terent’ev E. G. Gerasimov S. V. Grogor’ev A. I. Okorokov Yu. O. Chetverikov G. Ekerleb K. Pranzas A. N. Pirogov 《The Physics of Metals and Metallography》2013,114(7):566-572
The magnetic state of Y1 ? x Tb x Mn6Sn6 (with x ≤ 0.25) alloy is studied at different temperatures and magnetic fields by neutron diffraction. The alloy with x c = 0.22 exhibits an incommensurate-to-commensurate structure phase transition. The transition is accompanied by a decrease in the unit-cell volume. The weak dependence of the intensity of satellites on the x concentration and the monotonic displacement of their angular positions with increasing x allow us to conclude that the antiferromagnet → ferrimagnet transition occurs through the uniform magnetic state. The incommensurate phase in YMn6Sn6 exhibits four satellites, which are observed in the low-angle range of X-ray diffraction pattern and demonstrate different behavior with changing temperature. At 293 K, the antiferromagnet → ferromagnet transition in the Y1 ?x Tb x Mn6Sn6 compound can be induced by applied magnetic field, in particular, the field μ0 H = 0.3 T induces the transition in Tb0.15Y0.85Mn6Sn6. 相似文献
54.
N. V. Novikov G. P. Bogatyreva G. D. Il’nitskaya R. K. Bogdanov G. F. Nevstruev A. P. Zakora A. M. Isonkin V. N. Tkach I. N. Zaitseva 《Journal of Superhard Materials》2009,31(1):62-69
The paper summarizes the findings of investigation of the influence of physicochemical and physical-mechanical properties of synthetic diamond grits on the drilling tool performance. Wear resistance of drilling tools is demonstrated to increase when they are fitted with synthetic diamond grits that are highly uniform in strength. The use of diamond grits with a better developed surface is found to provide a stronger grit retention in the bond and reduced drilling tool wear. 相似文献
55.
S. P. Aleksandrova L. A. Bogdanova S. G. Sennikov A. P. Bogdanov 《Refractories and Industrial Ceramics》1990,31(1-2):9-11
Conclusions We studied the possibility of using the waste products of the aluminum industry as additives for obtaining gunite-bodies. In order to carry out guniting of the electrolytic cells, we suggested the application of the lining-slag type systems and the systems based on corundum for improving the service life of the refractory lining of these units.Translated from Ogneupory, No. 1, pp. 8–10, January, 1990. 相似文献
56.
A computational-experimental method is proposed for estimating the accuracy of measurement of the volume and mass of water in a crude oil stream. 相似文献
57.
58.
59.
S. A. Grudinkin N. A. Feoktistov K. V. Bogdanov M. A. Baranov A. V. Baranov A. V. Fedorov V. G. Golubev 《Semiconductors》2014,48(2):268-271
Isolated spherical diamond particles with embedded silicon-vacancy color centers are synthesized on a patterned surface of synthetic opal by chemical vapor deposition methods. The phase composition of the particles is determined and their structural and luminescence properties are studied. Prospects are discussed for the application of these particles as integrated spherical diamond microcavities, in which color centers are situated directly in the microcavities. 相似文献
60.