全文获取类型
收费全文 | 166篇 |
免费 | 5篇 |
专业分类
化学工业 | 26篇 |
金属工艺 | 14篇 |
机械仪表 | 7篇 |
能源动力 | 4篇 |
轻工业 | 28篇 |
石油天然气 | 2篇 |
无线电 | 48篇 |
一般工业技术 | 30篇 |
冶金工业 | 5篇 |
自动化技术 | 7篇 |
出版年
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 6篇 |
2020年 | 3篇 |
2019年 | 4篇 |
2018年 | 3篇 |
2017年 | 1篇 |
2016年 | 3篇 |
2015年 | 3篇 |
2014年 | 6篇 |
2013年 | 9篇 |
2012年 | 6篇 |
2011年 | 8篇 |
2010年 | 20篇 |
2009年 | 36篇 |
2008年 | 6篇 |
2007年 | 8篇 |
2006年 | 5篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 6篇 |
2002年 | 6篇 |
2001年 | 6篇 |
2000年 | 4篇 |
1999年 | 3篇 |
1998年 | 4篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1994年 | 1篇 |
排序方式: 共有171条查询结果,搜索用时 15 毫秒
21.
The maximum likelihood linear spectral transformation (ML‐LST) using a numerical iteration method has been previously proposed for robust speech recognition. The numerical iteration method is not appropriate for real‐time applications due to its computational complexity. In order to reduce the computational cost, the objective function of the ML‐LST is approximated and a closed‐form solution is proposed in this paper. It is shown experimentally that the proposed closed‐form solution for the ML‐LST can provide rapid speaker and environment adaptation for robust speech recognition. 相似文献
22.
Han-Shin Jo Cheol Mun June Moon Jong-Gwan Yook 《Wireless Communications, IEEE Transactions on》2009,8(10):4906-4910
This paper proposes two interference mitigation strategies that adjust the maximum transmit power of femtocell users to suppress the cross-tier interference at a macrocell base station (BS). The open-loop and the closed-loop control suppress the cross-tier interference less than a fixed threshold and an adaptive threshold based on the noise and interference (NI) level at the macrocell BS, respectively. Simulation results show that both schemes effectively compensate the uplink throughput degradation of the macrocell BS due to the cross-tier interference and that the closed-loop control provides better femtocell throughput than the open-loop control at a minimal cost of macrocell throughput. 相似文献
23.
Kyoung Soo Yook Soon Ok Jeon Chul Woong Joo Jun Yeob Lee Myung Seop Kim Hong Seok Choi Seok Jong Lee Chang-Wook Han Yoon Heung Tak 《Organic Electronics》2009,10(4):681-685
A high efficiency pure white phosphorescent organic light-emitting diode was developed by combining a deep blue emitting phosphorescent dopant material with red/green phosphorescent emitting materials. A simple stack structure of blue/red:green was used and tris((3,5-difluoro-4-cyanophenyl)pyridine) iridium was used as a deep blue emitting phosphorescent dopant. A pure white emission with a color coordinate of (0.29, 0.31) and a very high current efficiency of 28 cd/A was obtained after managing the device architecture of the all phosphorescent white devices. 相似文献
24.
The device performances of spin-coated and stamp transfer printed devices were compared. There was little difference of morphology between the spin-coated and stamp transfer printed devices. However, the stamp transfer printing process was better than the spin-coating process in terms of current density, light-emitting efficiency and lifetime. In particular, the lifetime of the stamp transfer printed device was doubled compared with that of the spin-coated device. 相似文献
25.
Soon Ok Jeon Kyoung Soo Yook Chul Woong Joo Hyo Suk Son Sang Eok Jang Jun Yeob Lee 《Organic Electronics》2009,10(5):998-1000
High efficiency red phosphorescent organic light-emitting diodes have been developed using a spirobenzofluorene type phosphine oxide (SPPO2) as a host material. The SPPO2 had a high glass transition temperature of 119 °C and a smooth surface morphology with a surface roughness less than 1 nm. The red device with the SPPO2 as a host showed a quantum efficiency of 14.3% with a current efficiency of 20.4 cd/A. 相似文献
26.
Kyoung Soo Yook Soon Ok Jeon Chul Woong Joo Jun Yeob Lee 《Journal of Industrial and Engineering Chemistry》2009,15(6):907-909
Hole injection properties of copper phthalocyanine (CuPc) layer doped with hexaazatriphenylene–hexacarbonitrile (HAT) were studied by changing the doping concentration of HAT. Hole injection efficiency of CuPc layer was improved by doping of HAT as a p-dopant and a maximum current density was obtained at a HAT doping concentration of 10%. The use of HAT doped CuPc layer as a hole injection layer improved the current efficiency of green phosphorescent organic light-emitting diodes. 相似文献
27.
Debabrata Pradhan Jong-Gwan Ahn Dong-Jin Kim Seoung-Won Lee 《Korean Journal of Chemical Engineering》2009,26(3):736-741
The ferrous oxidation ability of Acidithiobacillus ferrooxidans was studied in the presence of Ni2+, V4+ and Mo6+ in 9 K media in order to implement the culture in the bioleaching of spent catalyst. The rate of iron oxidation decreased
with increasing concentration of metal ions, but the rate of inhibition was metal-ion dependent. The tolerance limit was critical
at a concentration of 25 g/L Ni2+, 5 g/L V4+ and 0.03 g/L Mo6+. The growth rate of microorganisms was negligible at concentrations of 6 g/L V4+ and 0.04 g/L Mo6+. Levels and degree of toxicity of these ions have been quantified in terms of a toxicity index (TI). The toxicity order of
metal ions was found to be Mo6+>V4+>Ni2+. The significance and relevance of multi-metal ion tolerance in Acidithiobacillus ferrooxidans has been highlighted with respect to bioleaching of spent refinery catalyst. 相似文献
28.
Bambang Kuswandi Yudi Wicaksono Jayus Aminah Abdullah Lee Yook Heng Musa Ahmad 《Sensing and Instrumentation for Food Quality and Safety》2011,5(3-4):137-146
The development of chemical sensors and biosensors over several decades has been investigated resulting in novel and very interesting sensor devices with great promise for many areas of applications including food technology. The incorporation of such sensors into the food packaging technology has resulted what we call smart or intelligent packaging. These are truly integrated and interdisciplinary systems that invoke expertise from the fields of chemistry, biochemistry, physics and electronics as well as food science and technology. Smart packaging utilises chemical sensor or biosensor to monitor the quality & safety of food from the producers to the costumers. This technology can result in a variety of sensor designs that are suitable for monitoring of food quality and safety, such as freshness, pathogens, leakage, carbon dioxide, oxygen, pH, time or temperature. Thus, this technology is needed as on-line quality control and safety in term of consumers, authorities and food producers, and has great potential in the development of new sensing systems integrated in the food packaging, which are beyond the existing conventional technologies, like control of weight, volume, colour and appearance. 相似文献
29.
30.
Kim Moon-Won Noh Seung-Yoon Zahir Muhammad Zeeshan Yook Se-Jin 《Journal of Mechanical Science and Technology》2021,35(5):2229-2236
Journal of Mechanical Science and Technology - In this study, the performance of a zigzag type mist eliminator with drainage channels was improved using slit plates. The collection efficiency of... 相似文献