检索结果-内蒙古大学图书馆

Broadening factors of E1(LO) phonon-plasmon coupled modes of hexagonal InN investigated by infrared reflectance measurements

引用

Physical Review B 2007年第4期76卷 045206-045206页

作者： Yoshihiro Ishitani Takashi Ohira Xinqiang Wang Son-Bek Che Akihiko Yoshikawa Graduate School of Electrical and Electronics Engineering Venture Business Laboratory InN project as a CREST program JST Chiba University 1-33 Yayoicho Inage-ku Chiba 263-8522 Japan

The LO phonon-plasmon coupling of InN for the E1(LO) mode has been found; however, the decoupling for the A1(LO) mode has been reported in many issues. Several reports have discussed the electron- and phonon-scattering mechanisms, while there is no detailed investigation on the broadening factors of mode energies even for E1(LO) phonon-plasmon coupled scheme. In this issue, the studied InN layers grown by the molecular-beam epitaxy method have residual electron density obtained by Hall measurements in a range from 8×1017to1×1019cm−3. The electron density measured by infrared reflectance measurements is almost constant with a temperature variation from 5to300K. The dependence of the observed broadening factors of the E1(LO) phonon-plasmon coupled modes on the electron density is found to show the characteristic properties of the level anticrossing, in particular, for the increase of these broadening factors around the level anticrossing region with the temperature increase from 5to300K. Compared to the recent report on the LO phonon-plasmon coupled modes for A1(LO), smaller broadening for E1(LO) is observed here.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Contributors to the Lab on a Chip cell and tissue engineering in microsystems special issue

引用

Lab on a Chip 2007年第6期7卷 667-671页

作者： Bhatia, Sangeeta N. Chen, Christoper Bashir, Rashid Beebe, David J. Desai, Tejal Gottwald, Eric Khademhosseini, Ali Langer, Robert S. Piel, Matthieu Takayama, Shuichi Thorsen, Todd Tien, Joe Voldman, Joel Vunjak-Novakovic, Gordana Wu, Mingming Yu, Hanry Massachusetts Institute of Technology Harvard-MIT Division of Health Sciences and Technology Department of Electrical Engineering and Computer Science United States Laboratory for Multiscale Regenerative Technologies United States Department of Innovation University of Pennsylvania Department of Bioengineering United States Cell Biology and Physiology Program Cell Growth and Cancer Program Tissue Microfabrication Laboratory Department of Electrical and Computer Engineering and Biomedical Engineering Purdue University United States Department of Electronics University of Glasgow United Kingdom Department of Physiology and Bioengineering University of California San Francisco CA United States California Institute for Quantitative Biomedical Research UCSF/UC Berkeley Graduate Group in Bioengineering United States Laboratory of Therapeutic Micro and Nanotechnology Institute for Biological Interfaces Germany 3D-Cell Culture Techniques Group Institute for Biological Interfaces Germany Department of Medicine and Health Sciences and Technology Massachusetts Institute of Technology (MIT) United States Institut Curie UMR 144 IC/CNRS France Biomedical Engineering Department University of Michigan United States Department of Biomedical Engineering Macromolecular Science and Engineering Program United States Sibley School of Mechanical and Aerospace Engineering School of Chemical and Molecular Engineering Cornell University United States National University of Singapore Singapore Institute of Bioengineering and Nanotechnology A STAR Singapore

A graphical abstract is available for this content

关键词：

来源：评论

学校读者我要写书评

暂无评论

MARKOV DECISION PROCESSES WITH UNCERTAIN TRANSITION RATES: SENSITIVITY AND MAX HYPHEN MIN CONTROL

引用

Asian Journal of Control 2008年第2期6卷

作者： Suresh Kalyanasundaram Edwin K. P. Chong Ness B. Shroff Motorola India Electronics Limited No. 66/1 Plot 5 Bagmane Techpark C. V. Raman Nagar Post Bangalore 560 093 India. Department of Electrical and Computer Engineering Colorado State University Fort Collins CO 80523-1373 USA. Professor Edwin K. P. Chong received the B.E.(Hons.) degree with First Class Honors from the University of Adelaide South Australia in 1987 graduating top of his class and the M.A. and Ph.D. degrees in 1989 and 1991 respectively both from Princeton University where he held an IBM Fellowship. He joined the School of Electrical and Computer Engineering at Purdue University in 1991 where he was named a University Faculty Scholar in 1999 and promoted to Full Professor in 2001. Since August 2001 he has been a Professor of Electrical and Computer Engineering and Professor of Mathematics at Colorado State University. His current interests are in communication networks and optimization methods. He coauthored the best-selling book An Introduction to Optimization 2nd Edition Wiley-Interscience 2001. He received the NSF CAREER Award in 1995 and the ASEE Frederick Emmons Terman Award in 1998. He coauthored a paper that was awarded Best Paper in the journal Computer Networks 2003. Professor Chong is a Fellow of the IEEE. He was founding chairman of the IEEE Control Systems Society Technical Committee on Discrete Event Systems and until recently served as an IEEE Control Systems Society Distinguished Lecturer. He has been on the editorial board of the IEEE Transactions on Automatic Control. He is currently on the editorial board of the journal Computer Networks. He has also served on the organizing committees of several international conferences. He has been on the program committees for the IEEE Conference on Decision and Control the American Control Conference the IEEE International Symposium on Intelligent Control IEEE Symposium on Computers and Communications and the IEEE Global Telecommunications Conference. He has also served in the executive committees for the IEEE Co

Solution techniques for Markov decision problems rely on exact knowledge of the transition rates, which may be difficult or impossible to obtain. In this paper, we consider Markov decision problems with uncertain transition rates represented as compact sets. We first consider the problem of sensitivity analysis where the aim is to quantify the range of uncertainty of the average per-unit-time reward given the range of uncertainty of the transition rates. We then develop solution techniques for the problem of obtaining the max-min optimal policy, which maximizes the worst-case average per-unit-time reward. In each of these problems, we distinguish between systems that can have their transition rates chosen independently and those where the transition rates depend on each other. Our solution techniques are applicable to Markov decision processes with fixed but unknown transition rates and to those with time-varying transition rates.

关键词： Markov decision processes sensitivity max-min control call admission control policy iteration

来源：评论

学校读者我要写书评

暂无评论

Performance studies of a coding scheme for a slepian -wolf source network

Performance studies of a coding scheme for a slepian -wolf s...

引用

2006 International Conference on Communications in Computing, CIC 2006

作者： Aziz, Azizuddin Abdul Kieffer, John Electrical and Electronics Engineering Program Universiti Teknologi PETRONAS 31750 Tronoh Perak Malaysia Department of Electrical and Computer Engineering University of Minnesota 200 Union Street S.E. Minneapolis MN 55455 United States

ISBN: (纸本)1601320124

We investigate the simplest Slepian-Wolf source network, consisting of an information source correlated with a second source used as a side-information for the decoder but not the encoder. The information source and side-information source are modeled as binary random sequences X={i}Y={Yi} , respectively, for which the pairs (Xi Yi are independent- identically distributed (i.i.d). In 1973, Slepian and Wolf characterized the optimum rate at which X can be encoded so that the decoder can recover X with the aid of Y . It is only in recent years, however, that practical coding schemes have been proposed which encode at a rate close to the Slepian- Wolf rate. One such coding scheme, proposed by Ramchandran et al.[2], uses a binary linear block channel code for encoding X while the decoder is furnished with the coset for each source block. We propose an alternate coding scheme, in which we also use a linear block channel code based encoder, but instead use a decoder which minimizes distortion as measure by the per-letter expected Hamming distance between source blocks and decoded source blocks. We provide the results of computer calculations indicating the distortion improvement over the Ramchandran et al.[2] coding scheme that can be expected with our coding scheme. The comparisons are done for several source models and for several linear block codes. Copyright © 2006 CSREA Press.

关键词： Hamming distance

来源：评论

学校读者我要写书评

暂无评论

Electromagnetic emission based monitoring technique for polymer ZnO surge arresters

Electromagnetic emission based monitoring technique for poly...

引用

作者： Wong, K.L. Deakin University School of Engineering and Technology Pigdons Road Geelong Vic. 3217 Australia Electronics Degree Program IEEE Dielectrics Electrical Insulation Society

Electromagnetic emission at the very high frequency (VHF) range of 30 to 300 MHz is used to detect surface defects on outdoor polymer zinc oxide (ZnO) surge arresters. The partial discharge related signals are recorded and studied. Since the surge arresters are usually exposed to adverse weather conditions, the effect of moisture and pollution on the characteristics is also investigated. Samples subjected to surface pollution were created according to the IEC standard under both wet and dry conditions. The collected electromagnetic signals were sampled and analyzed using a joint time-frequency analysis tool called the Wigner-Ville distribution (WVD). The results of this work indicate that the WVD analysis can be used as a diagnostic tool for polymer ZnO surge arresters. © 2006 IEEE.

关键词： Lightning arresters

来源：评论

学校读者我要写书评

暂无评论

Problem-based and project-oriented learning. An efficient way to implement research based teaching in power electronic

引用

IEEJ Transactions on Industry Applications 2006年第5期126卷 653-658+16页

作者： Blaabjerg, Frede Teodorescu, Remus Chen, Zhe Aalborg University Institute of Energy Technology Pontoppidanstraede 101 DK-9220 Aalborg East Denmark Aalborg University Denmark Electrical Engineering Department Denmark Institute of Energy Technology Power Electronics and Drives Department Denmark Aalborg University Aalborg Denmark Wind Turbine Research Program IET Denmark Institution of Electrical Engineers London United Kingdom

Power electronics is an emerging technology. New applications are added every year as well as the power handling capabilities is steadily increasing. One example is renewable energy, which is efficiently enabled by power electronics. The demands to the education of engineers in this field are also increasing. Generally, the content of the curriculum should be more expanded without extra study time. This paper presents a teaching approach, which very fast makes it possible for the students to obtain in-depth skills into new research areas, and this method is the problem-oriented and project-based learning. The necessary skills for power electronic engineers are outlined that is followed up by a description on how the problem-oriented and project-based learning are implemented. A complete curriculum in power electronics and drives at Aalborg University is presented where different power electronics related projects at different study levels are finally presented.

关键词： Power electronics

来源：评论

学校读者我要写书评

暂无评论

Blank slate engineering at Florida Gulf Coast University - Innovative and multidisciplinary from the ground up

Blank slate engineering at Florida Gulf Coast University - I...

引用

113th Annual ASEE Conference and Exposition, 2006

作者： Blanchard, Susan Egiebor, Nosa Sweeney, James Zidek, Lisa Sechrist, Chalmers Hulbert, Sam Osborn, James O'Neill, Robert Florida Gulf Coast University United States FGCU School of Engineering Institute of Electrical and Electronics Engineers Biomedical Engineering Society American Institute for Medical and Biological Engineering United Kingdom Department of Environmental and Civil Engineering Arizona State University United States Department of Bioengineering Department of Bioengineering Arizona State University United States Flinn Foundation Funded Multi- and Interdisciplinary Graduate Training Program in Bioengineering Milwaukee School of Engineering United States Graduate Programs Industrial Engineering Program Department of Electrical and Computer Engineering Department of Engineering University of Illinois Urbana-Champaign United States Institute of Electrical and Electronics Engineers Rose-Hulman Institute for Technology School of Engineering FGCU School of Engineering's Advisory Board Roger Williams University United States Department of Civil Engineering Department of Engineering Roger Williams University United States

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

Gold nanoparticle wires made using RNA-based self-assembly

引用

Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures 2006年第6期24卷 3196-3199页

作者： Cumming, D.R.S. Bates, A.D. Callen, B.P. Cooper, J.M. Cosstick, R. Geary, C. Glidle, A. Jaeger, L. Pearson, J.L. Proupín-Ṕrez, M. Xu, C. Department of Electronics and Electrical Engineering University of Glasgow Glasgow G12 8LT United Kingdom School of Biological Sciences Biosciences Building University of Liverpool Crown Street Liverpool L69 7ZB United Kingdom Department of Chemistry University of Liverpool Crown Street Liverpool L69 7ZD United Kingdom Department of Chemistry and Biochemistry Biomolecular Science and Engineering Program University of California Santa Barbara CA 93106-9510

Self-assembly or bottom-up techniques based on molecular recognition are attracting a great deal of interest for nanofabrication. One such technology is based on the use of self-assembling tecto-RNA that has been shown to be able to make structures with nanoscale features (<10 nm) over large areas of the order of several microns. The technique is extremely flexible in that different RNA designs can be used to create dramatically different patterns, and the technology has the potential to scale up so that it might be used to pattern whole chips, or even wafers. In a step towards using molecular recognition techniques to build devices such as electronic circuits or sensors it is necessary to be able to add device structures or link functional units together. The authors show that the tecto-RNA method can be extended to attach gold nanoparticles using DNA linkers. The self-assembling properties of the RNA can in turn be used to link together the gold nanoparticles to form wires and clusters in a Mg2+ -ion controlled, as opposed to electrostatically aggregated, process. Using this method they have fabricated a gold nanoparticle wire between two nanoelectrodes and evaluated the electrical properties of the resultant device. © 2006 American Vacuum Society.

关键词： Nanostructured materials

来源：评论

学校读者我要写书评

暂无评论

The Effects of Varying Tilt Angle of Halo Implant on the Performance of Sub 100nm LAC MOSFETs

The Effects of Varying Tilt Angle of Halo Implant on the Per...

引用

International Conference on Industrial and Information Systems, ICIIS

作者： Partha Sarkar Abhijit Mallik Chandan Kumar Sarkar V. Ramgopal Rao Department of Electronics & Telecommunication Engineering Jadavpur University Kolkata India Q.I.P. program of AICTE Orissa Engineering College Bhubaneswar Orissa India Department of Electronics & Communication Engineering Kalyani Government Engineering College India Department of Electrical Engineering Indian Institute of Technology Bombay India

In this paper we systematically investigate the effects of the varying tilt angle of the halo implants on the different device performance parameters of 100 nm lateral asymmetric channel (LAC) MOSFETs. The tilt angle is varied from 5deg to 60deg with twist angle 0deg. Substantial reduction of sub-threshold swing is found for large tilt angles as compared to low angles of halo implant. The device structure, known as lateral asymmetric channel with large angle tilt implant (LACLATI), exhibits better reverse short channel effect and I on /I off , and lower junction capacitance

关键词： Implants Los Angeles Council MOSFETs Threshold voltage Industrial electronics Educational institutions Capacitance Communication industry electronics industry Information systems

来源：评论

学校读者我要写书评

暂无评论

Passive and hybrid PFC rectifiers - A survey and exploration of new possibilities

引用

IEEJ Transactions on Industry Applications 2006年第7期126卷 927-940页

作者： Nishida, Yasuyuki Department of Electrical and Electronics Engineering College of Engineering Nihon University Japan Nihon University Nihon University Japan Department of Electrical and Electronic Engineering Zurich Switzerland IEEE-Japan IEEE EPE Associations JIPE Technical-Program-Committee of Several International Conferences Including PCIM IPEC-Niigata-2005 PCC-Nagoya-2006

The diode rectifier offers several desirable features such as a unity displacement-factor and a high efficiency with low complexity and high reliability, but the utility line-current is significantly distorted. The traditional multi-pulse (e.g., 12-pulse, 18-pulse and so on) PAM concept by means of multiple rectifier units and phase-shifting isolation-transformers is a well-known scheme to improve the input line-current waveform and reduce dc-current/voltage ripple. Though, the necessity of the isolation-transformer is a great weak point especially for applications in low to medium power range. To mitigate the problem, several investigations have been done. The PWM rectifier is a modern and effective alternative, although it results in a higher initial cost, lower efficiency and EMI noise problems due to high frequency switching. To solve the problem, we have two alternatives without PWM and are so called "Passive" schemes. One is the multi-pulse/multi-phase scheme without the isolation transformer but with an autotransformer. This scheme results in a simplified multi-pulse PAM rectifier. The other is the Third-Harmonic-Current Injection and the expanded schemes. Although these two schemes have been studied independently in most cases, new types of diode PFC rectifier obtained by combining the two schemes have been studied recently. Additionally, further new topologies, so called "Hybrid" type, have been proposed very recently. The rectifiers with the new concept consist of an autotransformer-connected double 3-phase bridge 12-pulse rectifier and a PWM dc-dc converter on the de-side to perform the current injection. The Hybrid rectifiers offer output voltage controllability and sinusoidal input currents similarly to the PWM rectifiers. To show the current trends and remaining possibilities of the Passive and Hybrid rectifiers, this paper gives a survey and historical review of the rectifiers. Then, some new topologies in the category are investigated. Simulation and

关键词： Electric rectifiers

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：