全文获取类型
收费全文 | 259篇 |
免费 | 8篇 |
专业分类
电工技术 | 15篇 |
化学工业 | 89篇 |
金属工艺 | 3篇 |
建筑科学 | 2篇 |
能源动力 | 6篇 |
轻工业 | 8篇 |
水利工程 | 2篇 |
无线电 | 13篇 |
一般工业技术 | 38篇 |
冶金工业 | 19篇 |
自动化技术 | 72篇 |
出版年
2023年 | 4篇 |
2022年 | 17篇 |
2021年 | 20篇 |
2020年 | 8篇 |
2019年 | 6篇 |
2018年 | 11篇 |
2017年 | 3篇 |
2016年 | 2篇 |
2015年 | 10篇 |
2014年 | 15篇 |
2013年 | 19篇 |
2012年 | 9篇 |
2011年 | 19篇 |
2010年 | 10篇 |
2009年 | 11篇 |
2008年 | 10篇 |
2007年 | 14篇 |
2006年 | 9篇 |
2005年 | 8篇 |
2004年 | 1篇 |
2003年 | 6篇 |
2002年 | 5篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 11篇 |
1997年 | 5篇 |
1996年 | 6篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1987年 | 2篇 |
1985年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1974年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有267条查询结果,搜索用时 0 毫秒
211.
Broccia Giovanna Milazzo Paolo Ölveczky Peter Csaba 《Innovations in Systems and Software Engineering》2019,15(3-4):169-190
Innovations in Systems and Software Engineering - When a person is concurrently interacting with different systems, the amount of cognitive resources required (cognitive load) could be too high and... 相似文献
212.
Scientometrics - The analysis presented here focuses on mapping, based on publication output, the scientific collaboration of African based researchers and the role of the South African research... 相似文献
213.
214.
215.
Melinda Szaloki Jozsef Gall Katalin Bukovinszki Janos Borbely Csaba Hegedus 《Reactive and Functional Polymers》2013,73(3):465-473
Reactive polymeric nanoparticles were formed for reinforcement of photocurable dental resin. Cross-linked polymeric nanoparticles were synthesized by emulsion polymerization of mono- (methyl methacrylate; MMA) and trifunctional (trimethylol propane trimethacrylate; TMPTMA) monomers. The nanoparticles were dispersed in bisphenol A glycol dimethacrylate (Bis-GMA) based dental resin matrix in the range of 5–25 wt% to form photocurable nanocomposites.The effect of reactive polymeric particles on the mechanical properties of photocurable dental resin was investigated. Polymerization shrinkage, polymerization shrinkage stress, viscosity, diametral tensile strength, compressive, and flexural strength of the nanocomposites have been studied.It was observed that the cross-linked nanoparticles significantly influenced the mechanical properties of the reinforced dental resin nanocomposites. 相似文献
216.
Molecular architecture and biophysical properties of phospholipids during thermal adaptation in fish: An experimental and model study 总被引:1,自引:0,他引:1
Elfrieda Fodor Richard H. Jones Csaba Buda Klara Kitajka Indranil Dey Tibor Farkas 《Lipids》1995,30(12):1119-1126
Phospholipids from livers of carps (Cyprinus carpio L.) adapted to winter (5°C) and summer (25°C) temperatures were isolated, and the fatty acid composition of total phospholipids,
as well as molecular species composition of diacyl phosphatidylcholines and ethanolamines, were determined. Order parameter
of 5-doxyl stearic acid and steady-state fluorescence anisotropy of different anthroyloxy fatty acids—[2-, 12(N-9-anthroyloxy)stearic acid and 16(N-9-anthroyloxy)palmitic acid—embedded in native and synthetic (16∶0/16∶0, 16∶0/22∶6, 18∶0/22∶6, 18∶1/22∶6, 20∶4/20∶4, 22∶6/22∶6
phosphatidylcholines and 16∶0/18∶1, 18∶1/22∶6 phosphatidylethanolamines) phospholipid vesicles was also determined between
−30 and 30°C and 5 and 30°C, respectively. There is an accumulation of 1-monoenoic, 2-polyenoic diacyl phosphatidylcholine
and ethanolamine with a concomitant reduction of 1-stearoyl,2-docosahexaenoyl species in the cold-adapted state. Despite a
30% accumulation of long-chain polyunsaturated fatty acids in phospholipids in cold, there is only a 5°C downshift in the
solid-gel to liquid-crystalline phase transition temperature (−8 vs. −13°C). Vesicles from total phospholipids of cold-adapted
fish proved to be more disordered in all segments than from the warmadapted ones when assayed using 2,12-(N-9-anthroyloxy)stearic and 16-(N-9-anthroyloxy)palmitic acid. Vesicles made from purified phosphatidylcholines showed the same pattern, but they were more
disordered than the corresponding total phospholipids. This could be modelled using mixed phospholipid vesicles made of synthetic
16∶0/22∶6 phosphatidylcholine (75%) and either 18∶1/22∶6 phosphatidylethanolamine (25%) vs. 16∶0/18∶1 phosphatidylethanolamine
(25%) and comparison of the anisotropy parameters of 100% 16∶0/22∶6 and 100% 18∶1/22∶6 phosphatidylcholine vesicles. Mixing
either 16∶0/18∶1 (25%) or 18∶1/22∶6 (25%) phosphatidylethanolamines to 18∶0/22∶6 (75%) phosphatidylcholine shifted down or
up, respectively, the transition temperature of vesicles compared to 100% 18∶0/22∶6 vesicles assayed by electron spin resonance
spectroscopy using 5-doxylstearic acid. It is concluded that it is not the gross amount of long-chain polyunsaturated fatty
acids in phospholipids, but rather their specific combination withcis Δ9 monounsaturated fatty acids in the positionsn-1, especially in phosphatidylethanolamines, that is important in determining the physical properties of biomembranes in relation
to adaptational temperature. 相似文献
217.
Thermal transport in MWCNT sheets and yarns 总被引:2,自引:0,他引:2
Ali E. Aliev Csaba Guthy Mei Zhang Shaoli Fang Anvar A. Zakhidov John E. Fischer Ray H. Baughman 《Carbon》2007,45(15):2880-2888
Laser flash and self-heating 3ω techniques were employed to determine the anisotropic thermal conductivity and thermal diffusivity of a highly oriented, free-standing multiwalled carbon nanotube (MWCNT) sheet and a yarn drawn from a sidewall of the MWCNT forest grown by chemical-vapor deposition. Normalized to ideal high density structure the thermal conductivity and the thermal diffusivity along the alignment are 50 ± 5 W/m K and 45 ± 5 mm2/s, respectively, and are mostly limited by dangling terminals of bundles, intrinsic defects of individual nanotubes and phonon scattering within the bundles, which form the supporting matrix of the MWCNT sheet. The high degree of tube–tube overlap substantially decreases the electrical and thermal interconnection resistance, which usually dominates in randomly deposited mat-like nanotube assemblies. The extremely high surface area of the MWCNT sheet leads to excessive radial heat radiation that does not allow transferring the heat energy along the MWCNT sheet by means of phonons to distances >2 mm. On the other hand, the high surface area and negligible heat capacitance make it a perfect material for bolometric sensing (r = 38 V/W) and heat dissipation. 相似文献
218.
219.
This paper describes an approach to perform reproducible performance tests on virtual routers, comparing different virtual routing architectures, different software versions and configurations. The presented approach is based on VRKit, a software tool that allows to build pre‐configured bootable virtual router images with the desired characteristics. Design decisions are described, and some usage examples are presented, showing how the tool can be used for research on virtual routing, facilitating performance comparison of various virtual router implementations. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
220.
Stephan Breitkreutz Josef Kiermaier Cenk Yilmaz Xueming Ju Gy?rgy Csaba Doris Schmitt-Landsiedel Markus Becherer 《Journal of Computational Electronics》2011,10(4):352-359
In this paper we investigate error rates of nanomagnetic logic devices with perpendicular magnetization by compact modeling.
Two different types of nanomagnets for information propagation and logic computing are introduced. The switching behavior
of field-coupled nanomagnets is measured and analyzed. A compact model is derived from physics and experimental results are
applied to the magnetic compact model. General requirements for fabrication parameters and clocking fields for reliable operation
are extracted. We perform simulations and measurements on single devices to demonstrate the accuracy of the macromodel. Simulations
on complex systems show that the error rate of a field-coupled magnetic system strongly depends on the variation of the switching
field and the strength of the coupling field between the nanomagnets. The error rate of a 1-bit full adder is investigated
for varying dot parameters. The results demonstrate the importance of fast simulation tools for investigations on the design
of nanomagnetic computing devices and systems. 相似文献