检索结果-内蒙古大学图书馆

作者： Sawyer, Shayla Rumyantsev, Sergey L. Pala, Nezih Shur, Michael S. Bilenko, Yuriy Gaska, Remis Kosterin, Pavel V. Salzberg, Brian M. Department of Electrical Computer and Systems Engineering Center for Broadband Data Transport Science and Technology CII 9017 Rensselaer Polytechnic Institute Troy NY 12180-3590 United States Sensor Electronic Technology Inc. 1195 Atlas Road Columbia SC 29209 United States Departments of Neuroscience and Physiology University of Pennsylvania School of Medicine Philadelphia PA 19104 United States

Low frequency fluctuations in light intensity of 340 nm and 280 nm GaN-based light emitting diodes (LEDs) are compared with noise properties of other commercially available UV and visible wavelength LEDs and halogen lamps. At low frequencies, LEDs can exhibit lower levels of noise than halogen lamps. An LED noise quality factor β is estimated for the UV LEDs. © World Scientific Publishing Company.

关键词： Light emitting diodes

来源：评论

学校读者我要写书评

暂无评论

NOISE CHARACTERISTICS OF 340 nm AND 280 nmGaN-BASED LIGHT EMITTING DIODES

引用

International Journal of High Speed Electronics and systems 2004年第3期14卷 702-707页

作者： SHAYLA SAWYER SERGEY L. RUMYANTSEV NEZIH PALA MICHAEL S. SHUR YURIY BILENKO REMIS GASKA PAVEL V. KOSTERIN BRIAN M. SALZBERG Department of Electrical Computer and Systems Engineering Center for Broadband Data Transport Science and Technology CII 9017 Rensselaer Polytechnic Institute Troy NY 12180-3590 USA Sensor Electronic Technology Inc. 1195 Atlas Road Columbia SC 29209 USA Departments of Neuroscience and Physiology University of Pennsylvania School of Medicine Philadelphia PA 19104 USA

Low frequency fluctuations in light intensity of 340 nm and 280 nm GaN -based light emitting diodes (LEDs) are compared with noise properties of other commercially available UV and visible wavelength LEDs and halogen lamps. At low frequencies, LEDs can exhibit lower levels of noise than halogen lamps. An LED noise quality factor β is estimated for the UV LEDs.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Authors' reply to "Comments on On deembedding of port discontinuities in full-wave CAD models of multiport circuits"

引用

IEEE Transactions on Microwave Theory and Techniques 2004年第10期52卷 2449-2450页

作者： V.I. Okhmatovski J.D. Morsey A.C. Cangellaris Department of Custom Integrated Circuits Advanced Research and Development Cadence Design Systems Inc. Tempe AZ USA IBM Thomas J. Watson Research Center Yorktown Heights NY USA Center for Computational Electromagnetics Department of Electrical and Computer Engineering University of Illinois Urbana-Champaign Urbana IL USA

The authors reply to the comments made by Rautio (IEEE Trans. Microwave Theory Tech., vol.52, no.10, p.2448-9, Oct. 2004) on the original paper by Okhmatovski et al. (IEEE Trans. Microwave Theory Tech., vol.51, p.2355... 详细信息

关键词： Delay Feeds Calibration Coupling circuits Software performance Application specific integrated circuits Research and development Computational electromagnetics Voltage Electromagnetic analysis

来源：评论

学校读者我要写书评

暂无评论

Noise characteristics of 340 nm and 280 in GaN-based light emitting diodes

Noise characteristics of 340 nm and 280 in GaN-based light e...

引用

IEEE Conference on High Performance Devices

作者： S. Sawyer S.L. Rumyantsev N. Pala M.S. Shur Y. Bilenko R. Gaska P.V. Kosterin B.M. Salzberg Department of Electrical Computer and Systems Engineering Center for Broadband Data Transport Science and Technology Cll 9017 Rensselaer Polytechnic Institute Troy NY USA Sensor Electronic Technology Inc.orporated Columbia SC USA Departments of Neuroscience and Physiology University of Pennsylvania School of Medicine Philadelphia PA USA

关键词： Light emitting diodes Optical noise Fluctuations Low-frequency noise Light sources Frequency Photodiodes Resistors Proteins Batteries

来源：评论

学校读者我要写书评

暂无评论

Modeling of a flexible link in contact: Strain vs. force output

Modeling of a flexible link in contact: Strain vs. force out...

引用

2003 ASME International Mechanical engineering Congress

作者： Ziaei, K. Wang, D.W.L. Heppler, G.R. Electrical and Computer Engineering University of Waterloo Waterloo Ont. Canada Systems Design Engineering University of Waterloo Waterloo Ont. Canada

Many control design techniques for force control of flexible link manipulators, require an adequate transfer function model of the manipulator in contact. In this paper we derive a simple transfer function model for a single flexible link in contact with a stiff environment. While the transfer function from input torque to contact force is nonminimum phase, we show that the transfer function from input torque to strain results in a minimum phase transfer function and thus, it provides an attractive, alternative output for force control of flexible link manipulators. Experimental results verify the validity of the presented models.

关键词： Flexible manipulators

来源：评论

学校读者我要写书评

暂无评论

Nano, quantum, and molecular computing: Are we ready for the validation and test challenges? 8

Nano, quantum, and molecular computing: Are we ready for the...

引用

8th IEEE International High-Level design Validation and Test Workshop, HLDVT 2003

作者： Shukla, S.K. Karri, R. Goldstein, S.C. Brewer, F. Banerjee, K. Basu, S. Bradley School of Electrical and Computer Engineering Virginia Tech. United States Electrical and Computer Engineering Department Polytechnic University United States School of Computer Science Camegie Mellon University United States Department of Electrical and Computer Engineering University of California at Santa Barbara United States Design Automation of Micro and Nano Systems National Science Foundation United States

ISBN: (纸本)0780382366

In the recent years a lot of research effort is being spent in the areas of nanotechnology, quantum computation, and biologically inspired computing. As we are faced with various challenges regarding their implementability, architectural visions, and design automation, not much has been done in the field of high level design and validation in looking further into the future, and ponder about the state of the art in design validation and test in such miniscule technology era. Very few reported research work have surfaced on the design and validation challenges for these technologies. However, this certainly is a matter of concern because the technology of the small will be ridden with random faults and hence architectural design strategies need to change to take into account these stochastic models of failures to build robust designs. Validation of such designs also have to capture the stochastic behavioral models of the technology, and hence traditional validation and testing techniques will not work directly. Are we getting ready with our theory;technology and tools to address these challenges? This futuristic panel asks technology and computer aided design experts, as well as finding agency program managers questions about the technological barriers to be surpassed, as well as how the funding agencies such as NSF are ramping up for this technological future. © 2003 IEEE.

关键词： Testing

来源：评论

学校读者我要写书评

暂无评论

Dynamic scheduling issues in SMT architectures

Dynamic scheduling issues in SMT architectures

引用

International Parallel and Distributed Processing Symposium, IPDPS 2003

作者： Shin, Chulho Lee, Seong-Won Gaudiot, Jean-Luc System Design Technology Laboratory Samsung Electronics Corporation Korea Republic of Dept. of Electrical Engineering - Systems University of Southern California United States Dept. of Electrical Engineering and Computer Science University of California Irvine United States

ISBN: (纸本)0769519261

Simultaneous multithreading (SMT) attempts to attain higher processor utilization by allowing instructions from multiple independent threads to coexist in a processor and compete for shared resources. Previous studies have shown, however, that its throughput may be limited by the number of threads. A reason is that a fixed thread scheduling policy cannot be optimal for the varying mixes of threads it may face in an SMT processor. Our adaptive dynamic thread scheduling (ADTS) was previously proposed to achieve higher utilization by allowing a detector thread to make use of wasted pipeline slots with nominal hardware and software costs. The detector thread adaptively switches between various fetch policies. Our previous study showed that a single fixed thread scheduling policy presents much room (some 30%) for improvement compared to an oracle-scheduled case. In this paper, we take a closer look at ADTS. We implemented the functional model of the ADTS and its software architecture to evaluate various heuristics for determining a better fetch policy for a next scheduling quantum. We report that performance could be improved by as much as 25%. © 2003 IEEE.

关键词： Scheduling

来源：评论

学校读者我要写书评

暂无评论

VLSI design of high-throughput processing element for real-time particle filtering

VLSI design of high-throughput processing element for real-t...

引用

International Symposium on Signals, Circuits and systems, SCS 2003

作者： Chin, Shu-Shin Hong, Sangjin Mobile Systems Design Laboratory Department of Electrical and Computer Engineering State University of New York at Stony Brook Stony BrookNY11794-2350 United States

ISBN: (纸本)0780379799

This paper presents a VLSI ASIC design of a high-throughput processing element for real-time particle filtering applications. The implementation is based on robust and efficient fixed-point processing algorithms. The high-throughput is achieved through two-level pipelining and preserving the inherent parallelism. The pipeline depth is balanced among sub-units to reduce clock loading via reduction of unnecessary registers. The processing element can be used as a standalone particle filter or a part of parallel particle filters for high-speed and/or larger particles. © 2003 IEEE.

关键词： Monte Carlo methods

来源：评论

学校读者我要写书评

暂无评论

Optimum scheduling and memory management in input queued switches with finite buffer space

Optimum scheduling and memory management in input queued swi...

引用

IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： S. Sarkar Departments of Electrical and Systems Engineering and Computer and Information Sciences University of Pennsylvania USA

This paper addresses scheduling and memory management in input queued switches with finite input buffers, with the objective of minimizing packet loss. The framework and algorithms proposed here apply to buffer constrained wireless networks as well. The scheduling problem has been extensively addressed under the assumption of infinite input buffers. We study the finite buffer case here which arises in practice. The introduction of memory constraint significantly complicates the problem. The optimal strategies for infinite buffer case no longer apply and become strictly suboptimal in presence of memory limitations. We present closed form optimal strategies which minimize packet loss in 2 × 2 switches with equal arrival rates for all streams. We identify certain characteristics of the optimal strategy for arbitrary arrival rates, and use these properties to design a near optimal heuristic. We use the insight obtained from the investigation for 2 × 2 switches to propose a heuristic for N × N switches, arbitrary N and show numerically that this strategy performs close to optimal. The policies presented here reduce packet loss by about 25% as compared to the optimal strategy for the infinite buffer case.

关键词： Memory management Switches Packet switching Resource management Indium phosphide Processor scheduling Throughput Performance loss Scheduling algorithm Wireless networks

来源：评论

学校读者我要写书评

暂无评论

Exploring alternative wavelet base selection techniques with application to high resolution radar classification

Exploring alternative wavelet base selection techniques with...

引用

6th International Conference on Information Fusion, FUSION 2003

作者： Waagen, Donald E. Scott, Clayton Cassabaum, Mary L. Schmitt, Harry A. ATR Design Center Raytheon Company Tucson AZ United States Electrical and Computer Engineering Rice University Houston TX United States Cognitive Systems Raytheon Company Tucson AZ United States

ISBN: (纸本)0972184449

Coifman, Wickerhauser;and Saito developed the concepts of the wavelet 'best-basis' algorithm and the local discriminant bases (LDB) algorithm for signal and image characterization and classification. LDH was originally based on the differentiation of class-specific time-frequency energy distributions, using an Lt norm for multi-class feature weighting. Recent extensions to the approach for discrimination estimate the Kullback- Leibler distance between empirically estimated class- conditional probability densities. This paper offers a complimentary approach for wavelet base/feature selection via the Kolmogorov-Smirnov test and algorithmic extensions for wavelet feature selection in a multi-class environment. Alternative feature score normalizations are investigated. Additionally, this research develops a dynamic re-weighting scheme for feature selection. The goal of the dynamic feature re- weighting process is similar in spirit to 'boosting', as it attempts to bias the base selection process to select features which offer more discrimination between currently 'costly' or 'tough' classes of interest. We investigate the efficacy of the algorithms in a multi-class discrimination setting using simulated high-resolution multi-polarimetric millimeter-wave real-beam radar signatures of ground vehicles. © Commonwealth of Australia 2003.

关键词： Automatic target recognition

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：