全文获取类型
收费全文 | 298篇 |
免费 | 9篇 |
学科分类
工业技术 | 307篇 |
出版年
2022年 | 3篇 |
2020年 | 3篇 |
2019年 | 4篇 |
2018年 | 14篇 |
2017年 | 14篇 |
2016年 | 6篇 |
2015年 | 5篇 |
2014年 | 7篇 |
2013年 | 12篇 |
2012年 | 11篇 |
2011年 | 16篇 |
2010年 | 12篇 |
2009年 | 10篇 |
2008年 | 12篇 |
2007年 | 17篇 |
2006年 | 10篇 |
2004年 | 5篇 |
2003年 | 3篇 |
2002年 | 6篇 |
2001年 | 7篇 |
1999年 | 3篇 |
1997年 | 6篇 |
1996年 | 4篇 |
1995年 | 8篇 |
1994年 | 4篇 |
1992年 | 3篇 |
1991年 | 4篇 |
1990年 | 5篇 |
1989年 | 8篇 |
1988年 | 6篇 |
1987年 | 4篇 |
1985年 | 3篇 |
1983年 | 4篇 |
1982年 | 2篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1978年 | 4篇 |
1977年 | 5篇 |
1976年 | 5篇 |
1975年 | 4篇 |
1974年 | 2篇 |
1973年 | 3篇 |
1972年 | 7篇 |
1969年 | 2篇 |
1968年 | 3篇 |
1964年 | 2篇 |
1963年 | 2篇 |
1962年 | 2篇 |
1961年 | 2篇 |
1960年 | 2篇 |
排序方式: 共有307条查询结果,搜索用时 0 毫秒
1.
A speed regulated electric drive for a thyristor voltage converter-induction motor system is presented. The frequency of rotor rotation is determined on the basis of the EMF and the stator voltage 相似文献
2.
3.
Nesterov A König K Felgenhauer T Lindenstruth V Trunk U Fernandez S Hausmann M Bischoff FR Breitling F Stadler V 《The Review of scientific instruments》2008,79(3):035106
We examined the high precision deposition of toner and polymer microparticles with a typical size of approximately 10 microm on electrode arrays with electrodes of 100 microm and below using custom-made microelectronic chips. Selective desorption of redundant particles was employed to obtain a given particle pattern from preadsorbed particle layers. Microparticle desorption was regulated by dielectrophoretic attracting forces generated by individual pixel electrodes, tangential detaching forces of an air flow, and adhesion forces on the microchip surface. A theoretical consideration of the acting forces showed that without pixel voltage, the tangential force applied for particle detachment exceeded the particle adhesion force. When the pixel voltage was switched on, however, the sum of attracting forces was larger than the tangential detaching force, which was crucial for desorption efficiency. In our experiments, appropriately large dielectrophoretic forces were achieved by applying high voltages of up to 100 V on the pixel electrodes. In addition, electrode geometries on the chip's surface as well as particle size influenced the desorption quality. We further demonstrated the compatibility of this procedure to complementary metal oxide semiconductor chip technology, which should allow for an easy technical implementation with respect to high-resolution microparticle deposition. 相似文献
4.
Vyacheslav M. Nesterov 《Reliable Computing》1997,3(4):369-380
The problem of finding inner and outer estimations of the range of values of a real function is considered. An overview of interval arithmetics being used for improvement of outer estimations is given. The twin arithmetic is introduced for simultaneous inner and outer estimations and directed twin arithmetic is proposed as generalization of the directed interval arithmetic. 相似文献
5.
R. K. Islamgaliev V. D. Sitdikov K. M. Nesterov A. V. Ganeev E. V. Bochkova 《Russian Metallurgy (Metally)》2014,2014(3):234-240
Structural studies of the nanocrystalline titanium powders produced by cryogenic milling followed by severe plastic deformation consolidation are performed. The results obtained are compared with the results obtained for monolithic titanium subjected to severe plastic deformation by torsion. 相似文献
6.
Gitis V. G. Derendyaev A. B. Petrov K. N. Weinstock A. P. Dumanskaya I. O. Zatsepa S. N. Zelenko A. A. Ivchenko A. A. Nesterov E. S. 《Journal of Communications Technology and Electronics》2018,63(6):691-705
Journal of Communications Technology and Electronics - A new geoinformation technology for monitoring the hydrometeorological situation in the Arctic is considered. This technology combines two... 相似文献
7.
O.A. Zakurdaeva S.V. Nesterov G.K. Semenova V.I. Feldman 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》2007,265(1):356-361
Radiation-chemical synthesis of poly(vinyl alcohol) hydrogels containing physically immobilized dicyclohexano-18-crown-6 was carried out. Remarkable gel fraction of 40-70% was observed at absorbed dose of about 5 kGy. Increasing degree of poly(vinyl alcohol) crosslinking led to growth of the efficiency of crown ether immobilization. Post-irradiation thermal annealing of the hydrogel samples at 120 °C for 0.5-5 h resulted in an increase of crown ether retention as compared with non-annealed samples by approximately 20% at the same absorbed dose. Preliminary results on a sorption behavior of the crown-containing hydrogels with respect to Sr2+ cations in 2.4 M HNO3 solution are presented. 相似文献
8.
V. A. Rozentsvet V. G. Kozlov N. A. Sablina V. N. Nesterov Z. D. Fedorova D. N. Munasypov A. M. Kiryukhin 《Petroleum Chemistry》2018,58(8):694-701
The cationic oligomerization of the pyrolysis C5 fraction in the presence of catalyst systems based on AlCl3, VOCl3, BF3 · O(C2H5)2, and a Gustavson complex has been investigated. It has been shown that the use of the diisopropyl ether-modified Gustavson complex in the reaction makes it possible to synthesize fully soluble oligomers in high yields. The conversions of all the unsaturated components of the pyrolysis fraction to the oligomer at different durations of the oligomerization process have been determined. The synthesized oligomers are characterized by high unsaturation and exhibit the properties of film-forming compounds. 相似文献
9.
30 patients were exposed to interference currents (IC) alone (group 1) versus 34 patients treated with IC plus iodobromine baths (group 2). After IC action on the region of the kidney projection patients of group 1 experienced positive changes in cellular and humoral immunity providing an antiinflammatory effect. In group 2, the improvement was seen in renal and urinary functions, 24-h urinary excretion of oxalates and calcium diminished. Interference current proved beneficial in chronic pyelonephritis patients with latent inflammation. The combined therapy was effective in patients at high risk of lithogenesis. 相似文献
10.