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International Conference on European Electricity Market, EEM

作者： K. Ponnambalam Y. E. Saad M. Mahootchi A.W. Heemink Systems Design Engineering Department University of Waterloo Waterloo ONT Canada Department of Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada Amirkabir University of Technology슠 Iran Delft Institute of Applied Mathematics Technical University Delft Delft Netherlands

Renewable energy systems such as solar and wind are notorious for their varying energy production. Joint use of a battery system can mitigate this problem to meet constant demand. In this paper, we compare three methods, namely, (i) Monte Carlo simulation based optimization, (ii) Stochastic programming, and (iii) Optimization using Storage moment equations of Fletcher and Ponnambalam to determine the relation between the battery system capacity versus available energy for use. The first two methods require a large number of samples while the last method uses only the statistical information. Each of these methods can also produce required probabilities of failures as a function of capacity and demand.

关键词： Optimized production technology Programming

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Utility Functionals Associated With Available Congestion Control Algorithms

Utility Functionals Associated With Available Congestion Con...

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2010 Proceedings IEEE INFOCOM

作者： Javad Lavaei John C. Doyle Steven H. Low Department of Control and Dynamical Systems California Institute of Technology Computer Science and Electrical Engineering Departments California Institute of Technology

ISBN: (纸本)9781424458363

This paper is concerned with understanding the connection between the existing Internet congestion control algorithms and the optimal control theory. The available resource allocation controllers are mainly devised to derive the state of the system to a desired equilibrium point and, therefore, they are oblivious to the transient behavior of the closed-loop system. To take into account the real-time performance of the system, rather than merely its steady-state performance, the congestion control problem should be solved by maximizing a proper utility functional as opposed to a utility function. For this reason, this work aims to investigate what utility functionals the existing congestion control algorithms maximize. In particular, it is shown that there exist meaningful utility functionals whose maximization leads to the celebrated primal, dual and primal/dual algorithms. An implication of this result is that a real network problem may be solved by regarding it as an optimal control problem on which some practical constraints, such as a real-time link capacity constraint, are imposed.

关键词： computer algorithms FUNCTIONALS System performance equilibrium point Utility functions Transient performance real-time link

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A dual-band filter using stepped-impedance resonator (SIR) embedded into substrate integrated waveguide (SIW)

A dual-band filter using stepped-impedance resonator (SIR) e...

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electrical design of Advanced Packaging and systems Symposium, EDAPS

作者： Lin-Sheng Wu Jun-Fa Mao Wen-Yan Yin Yong-Xin Guo Key Laboratory of Ministry of Education of China for Research of Design and Electromagnetic Compatibility of High Speed Electronic Systems Shanghai Jiaotong University Shanghai China Department of Electrical and Computer Engineering National University of Singapore Singapore Center of Optics and EM Research State Key Laboratory of MOI University of Zhejiang Hangzhou China

A new hybrid-integrated dual-band filter is proposed for WLAN application, where the lower passband is implemented by a pair of stepped-impedance resonators (SIRs) and the higher passband is provided by two substrate integrated waveguide (SIW) cavities. In our design, the SIRs are embedded into the SIWs to reduce the size. The relationship between the parasitic resonances of SIW structure and the locations of its transmission zeros is studied. Its good performances have been demonstrated by the simulated and measured S-parameters.

关键词： Resonator filters Band pass filters Couplings Passband Dual band Filtering theory Microwave filters

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Interpreting the iISS Small-Gain Theorem as Transient Plus ISS Small-Gain Regulation

Interpreting the iISS Small-Gain Theorem as Transient Plus I...

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2010 49th IEEE Conference on Decision and Control

作者： Hiroshi Ito Randy A. Freeman Antoine Chaillet Department of Systems Design and Informatics Kyushu Institute of Technology 680-4 Kawazu Iizuka 820-8502 Japan Department of Electrical Engineering and Computer Science Northwestern University Evanston IL 60208-3118 USA L2S EECI Univ. Paris Sud 11 - Supelec 3 rue Joliot Curie 91192 Gif-sur-Yvette France

ISBN: (纸本)9781424477456

This paper addresses the problem of establishing stability of interconnections of integral input-to-state stable (iISS) systems. Recently, the small-gain theorem for input-to-state stable (ISS) systems has been extended to the class of iISS systems. It has been also proved that at least one of the two iISS subsystems comprising a feedback interconnection needs to be ISS with respect to the state of the other subsystem for guaranteeing the iISS of the overall system. This paper shows that making use of this necessary condition enables to provide more insight on the iISS small gain theorem by giving an alternative proof of this result from the perspective of transient plus ISS small-gain regulation.

关键词： Theorem SUB-SYSTEM small gain theorem Gain control Standing Orders

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The influence of strong recommendations, good incident reports and a monitoring system over an incident investigation system for health-care facilities

The influence of strong recommendations, good incident repor...

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53rd Human Factors and Ergonomics Society Annual Meeting 2009, HFES 2009

作者： Morita, P.P. Burns, C.M. Calil, S.J. Department of Biomedical Engineering School of Electrical and Computer Engineering University of Campinas Campinas Brazil Department of Systems Design Engineering University of Waterloo Waterloo ON Canada Center of Biomedical Engineering University of Campinas Campinas Brazil

ISBN: (纸本)9781615676231

Different industry sectors have developed numerous tools for risk management, from simple risk assessments to more complex tools like Failure Modes and Effects Analysis (FMEA) and incident investigation methodologies. Although the healthcare sector deals with a highly risky environment, little has been done in the risk management area if compared to other Industries and service providers with the same level of inherent risk. To overcome these deficiencies, some methodologies have been created to fill the existing gaps in healthcare facilities. One of these tools is the incident investigation and as with any risk management tool, it is highly dependent on the way its results are communicated to the institution's administration and employees. Another shaping factor of the success of the recommendations from an incident investigation process is the follow-up applied after the recommendations are put in place. Even strong systems can fail by not giving appropriate attention for human factors on the design and implementation of recommendations, reports and follow-up procedures. This paper will discuss the importance of the development of strong recommendations after an incident investigation;a specifically designed incident investigation report, appropriate to the characteristics and mission of the institution;as well as the necessary follow-up system for the verification and control of the presented recommendations. Factors like the institution support, employee involvement, strong recommendations and adequate follow-up on the recommendations must be taken into consideration in order to obtain good safety results after an incident investigation.

关键词： Risk management

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A single layer zero skew clock routing in X architecture

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Science in China(Series F) 2009年第8期52卷 1466-1475页

作者： SHEN WeiXiang CAI YiCi HONG XianLong HU Jiang LU Bing Electronic Design Automation Laboratory Departmeat of Computer Science and Technology Tsinghua University Beijing 100084 China Electrical and Computer Engineering Texas A&M University College Station TX 77843 USA Cadence Design Systems Inc 35 Spring Street New Providence NJ 07974 USA

With its advantages in wirelength reduction and routing flexibility compared with conventional Manhattan routing, X architecture has been proposed and applied to modern IC design. As a critical part in high-performance integrated circuits, clock network design meets great challenges due to feature size decrease and clock frequency increase. In order to eliminate the delay and attenuation of clock signal introduced by the vias, and to make it more tolerant to process variations, in this paper, we propose an algorithm of a single layer zero skew clock routing in X architecture （called Pianar-CRX）. Our Planar- CRX method integrates the extended deferred-merge embedding algorithm （DME-X, which extends the DME algorithm to X architecture） with modified Ohtsuki＇s line-search algorithm to minimize the total wirelength and the bends. Compared with planar clock routing in the Manhattan plane, our method achieves a reduction of 6.81% in total wirelength on average and gets the resultant clock tree with fewer bends. Experimental results also indicate that our solution can be comparable with previous non-planar zero skew clock routing algorithm.

关键词： clock routing single layer X architecture zero skew

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Introduction to GPU programming for EDA 09

Introduction to GPU programming for EDA

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2009 IEEE/ACM International Conference on computer-Aided design, ICCAD 2009

作者： Croix, John F. Khatri, Sunil P. Cadence Design Systems San Jose CA 95134 United States Department of Electrical and Computer Engineering Texas A and M University College Station TX 77843 United States

ISBN: (纸本)9781605588001

Advances in GPU technology have propelled the GPU into arenas far afield from the traditional, isolated roles they have previously played. With hundreds of processing units in a single GPU, substantial speedups can be achieved by harnessing their power to augment the performance of the traditional single- or multi-core CPU on certain compute-intensive applications. However, utilizing the GPU requires both a change in the programmer's traditional algorithmic model as well as a judicious selection of algorithm being used for the problem. This paper reviews the GPU architecture and the tools available to utilize this valuable resource. It also provides insight into the type of problem best suited for the GPU as well as programming styles required to fully harness the power of the GPU. We present examples of specific EDA algorithms that can benefit from GPU acceleration, using both the CUDA and OpenCL environments. Copyright 2009 ACM.

关键词： Graphics processing unit

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Stochastic channel prioritization for spectrum sensing in cooperative cognitive radio

Stochastic channel prioritization for spectrum sensing in co...

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2009 6th IEEE Consumer Communications and Networking Conference, CCNC 2009

作者： Wang, Xiaoyu Wong, Alexander Ho, Pin-Han Department of Electrical and Computer Engineering University of Waterloo ON N2L 3G1 Canada Department of Systems Design Engineering University of Waterloo ON N2L 3G1 Canada

ISBN: (纸本)9781424423095

In this paper, a novel cooperative stochastic channel prioritization algorithm is presented for the purpose of improving spectrum sensing efficiency in cooperative cognitive radio systems. The proposed algorithm achieves the goal by prioritizing the channels for fine sensing based on both local statistics obtained by the cognitive radio as well as long-term spatiotemporal statistics obtained from other cognitive radios. Channel priority is determined in a stochastic manner by performing statistical fusion on the local statistics and statistics from neighboring cognitive radios to obtain a biasing density from which stochastic sampling can be used to identify the likelihood of channel availability. Therefore, the individual cognitive radios collaborate to improve the likelihood of each cognitive radio in obtaining available channels. Simulation results show that the proposed cooperative stochastic channel prioritization algorithm can be used to reduce both sensing overhead and percentage of missed opportunities when implemented in a complimentary manner with existing cooperative cognitive radio systems. ©2009 IEEE.

关键词： Cognitive radio

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An Iterative Method for the Output-Feedback Mixed H2/H∞Control Problem

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SICE Journal of Control, Measurement, and System Integration 2009年第1期2卷 36-42页

作者： Yasushi Kami Eitaku Nobuyama Department of Electrical and Computer Engineering Akashi National College of Technology Department of Systems Design and Informatics Kyushu Institute of Technology

This paper is concerned with the mixed H2/H∞ control problem with output-feedback. To propose a new iterative method for the problem we firstly construct a controller sequence which converges to the unconstrained globally optimal H2 controller. After then, using this sequence, we propose an iterative method for the mixed H2/H∞ control problem. The advantage of our method is to guarantee that the obtained solution is either the globally optimal solution or a feasible solution in the neighborhood of the boundary of the H∞ norm constraint. A numerical example shows the efficiency of our method.

关键词： output-feedback mixed H2/H&infin control iterative method observer-based controller non-common Lyapunov variables

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Framework for statistical design of a flip-flop

Framework for statistical design of a flip-flop

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2009 16th IEEE International Conference on Electronics, Circuits and systems, ICECS 2009

作者： Sadrossadat, Sayed Alireza Mirsaeedi, Minoo Ponnambalam, Kumaraswamy Anis, Mohab Department of Electrical and Computer Engineering University of Waterloo Waterloo ON N2L 3G1 Canada Department of Systems Design Engineering University of Waterloo Waterloo N2L 3G1 Canada

ISBN: (纸本)9781424450916

This paper presents a statistical framework for the design of flip-flops under process variations in order to maximize their timing yield. In nanometer CMOS technologies, process variations significantly impac. The timing performance of sequential circuits which may eventually cause their malfunction. Therefore, developing a framework for designing such circuits is inevitable. Our framework generate. The values oy the nominal design parameters;i.e.. The size of gates and transmission gates of flip-flop such that maximum timing yield is achieved for flip-flops. While previous works focused on improvin. The yield of flip-flops, less research was done to improv. The timing yield i. The presence of process variations. © 2009 IEEE.

关键词： Flip flop circuits

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