检索结果-内蒙古大学图书馆

2009 IEEE Wireless Communications and Networking Conference, WCNC 2009

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

ISBN: (纸本)9781424429486

In this paper, a novel statistics-driven spectrum sensing algorithm is developed for improving spectrum sensing efficiency in the media access control (MAC) layer of cognitive radio (CR) systems. The proposed algorithm aims to achieve higher spectrum sensing efficiency and spectrum access opportunity by prioritizing channels for fine sensing based on the statistical likelihood of channel availability. The sensing priority is obtained by jointly exploiting the long-term spatiotemporal statistics recorded from the historical result of fine sensing, the short-term statistical information of channel condition obtained from a small-scale observation window, and the instantaneous statistical information obtained from fast sensing. Simulation results show that the proposed prioritization algorithm can achieve improved data transmission rates and reduced missed spectrum access opportunities when compared to the conventional nonprioritization spectrum sensing approach for situations where cooperative spectrum sensing is not suitable. © 2009 IEEE.

关键词： Cognitive radio

来源：评论

学校读者我要写书评

暂无评论

The Influence of Strong Recommendations, Good Incident Reports and a Monitoring System over an Incident Investigation System for Healthcare Facilities

引用

Proceedings of the Human Factors and Ergonomics Society Annual Meeting 2009年第22期53卷 1679 - 1683页

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

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：

来源：评论

学校读者我要写书评

暂无评论

A system-level design methodology for application-specific networks-on-chip

引用

Journal of Embedded Computing 2009年第3期3卷 167-177页

作者： Bartzas, Alexandros Papadopoulos, Lazaros Soudris, Dimitrios VLSI Design and Testing Center Department of Electrical and Computer Engineering Democritus University of Thrace 67100 Xanthi Greece Microprocessors and Digital Systems Lab School of Electrical and Computer Engineering National Technical University of Athens 15780 Zografou Greece

Modern embedded consumer devices execute complex network and multimedia applications that require high performance and low energy consumption. For implementing complex applications on Network-on-Chips (NoCs), a design methodology is needed for performing exploration at NoC system-level, in order to select the optimal application-specific NoC architecture, serving the application requirements in the best way. The design methodology we present in this paper is based on the exploration of different NoC characteristics and is supported by a flexible NoC simulator which provides the essential evaluation metrics in order to select the optimal communication parameters of the NoC architectures. We illustrated that it is possible with the evaluation metrics provided by the simulator we present, to perform exploration of several NoC aspects and select the optimal communication characteristics for NoC platforms having network and multimedia applications as the target domains. With our methodology we can achieve a gain of 57% in the Energy x Delay Product on average.

关键词： Network-on-chip topology exploration application-specific

来源：评论

学校读者我要写书评

暂无评论

A new probing scheme for fault detection and identification

A new probing scheme for fault detection and identification

引用

IEEE International Conference on Electro-Information Technology

作者： Abduljalil A. Mohamed Otman Basir Systems Design Engineering Department University of Waterloo Waterloo Canada Electrical and Computer Engineering Department University of Waterloo Waterloo Canada

Probing technology has been used as a fault detection and identification method in computer networks and successful applications have been reported. One of the most appealing features of probing-based schemes is that it is an active approach. A set of probes can be sent on a periodic basis. If a network failure is detected, the outcomes of these probes are further analyzed to determine the root cause of the problem. However, the availability of a large set of such probes may in fact place a huge burden on management systems in terms of extra management traffic and storage space. Hence, the need of minimizing such a probing set has become highly desirable. In this work, we propose a preplanned probe selection scheme, in which a small set of probes are chosen such that it maintains the diagnostic power of the original set. The new approach is based on the constraint satisfaction problem paradigm and its powerful search techniques are exploited. The efficiency of the new algorithm has been demonstrated by the results reported.

关键词： Fault detection Fault diagnosis Probes Testing computer networks Power system management computer network management Neural networks design engineering systems engineering and theory

来源：评论

学校读者我要写书评

暂无评论

Stochastic Channel Prioritization for Spectrum Sensing in Cooperative Cognitive Radio

Stochastic Channel Prioritization for Spectrum Sensing in Co...

引用

Consumer Communications and Networking Conference, CCNC IEEE

作者： Xiaoyu Wang Alexander Wong Pin-Han Ho Department of Electrical and Computer Engineering University of Waterloo ONT Canada Department of Systems Design Engineering University of Waterloo ONT Canada

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.

关键词： Stochastic processes Cognitive radio Statistics Fading Stochastic systems Chromium Telecommunication traffic Traffic control design engineering systems engineering and theory

来源：评论

学校读者我要写书评

暂无评论

Next-generation advances in cognitive processing using spiking neural networks for biochemical sensing, radar and rapid HDL

Next-generation advances in cognitive processing using spiki...

引用

IEEE National Conference on Aerospace and Electronics (NAECON)

作者： Hoda S. Abdel-Aty-Zohdy Jacob Allen Microelectronics Systems Design Laboratory Department of Electrical and Computer Engineering Oakland University Rochester MI USA

ISBN: (纸本)9781424444946

This invited plenary paper introduces a novel spiking neural network methodology, and applies it to an odorant learning, medical and radar detection applications. Rapid HDL is introduced as a 15 minute rapid prototyping approach, where real-time implementations will be demoed on FPGAs. The spike-time dependent plasticity can support coding schemes that are based on spatio-temporal spike patterns. Spiking (or pulsed) neural networks (SNNs) are models which explicitly take into account the timing of inputs. The network input and output are usually represented as series of spikes (delta function or more complex shapes). Plasticity SNNs have an advantage of being able to recurrently process information. Spike-time dependent plasticity can enhance signal transmission by selectively strengthening synaptic connections that transmit precisely timed spikes at the expense of those synapses that transmit poorly timed spikes.

关键词： Next generation networking Neural networks Radar Hardware design languages Signal design Signal processing Signal processing algorithms Biomedical signal processing Field programmable gate arrays Electronic noses

来源：评论

学校读者我要写书评

暂无评论

A reconfigurable spiking neural network digital ASIC simulation and implementation

A reconfigurable spiking neural network digital ASIC simulat...

引用

IEEE National Conference on Aerospace and Electronics (NAECON)

作者： Kevin Van Sickle Hoda Abdel-Aty-Zohdy Microelectronics Systems Design Lab Department of Computer and Electrical Engineering Oakland University Rochester MI USA

ISBN: (纸本)9781424444946

A reconfigurable spiking neural network is implemented in a 0.5 ¿m CMOS digital tiny-chip. The connection weights are uploaded to registers on the ASIC. These weights are learned off-line, using combined simulated annealing and genetic algorithm. Large computational power and many simulations create small powerful networks that are adapted to interact with the environment. These configurations are swapped in and out of the ASIC to cope with varying situations and increase robustness. The network has been successfully tested with a simulated robot in a maze and can be extended for target recognition.

关键词： Neural networks Application specific integrated circuits Computational modeling Registers Simulated annealing Genetic algorithms computer networks Robustness Testing Robots

来源：评论

学校读者我要写书评

暂无评论

Congestion Control Algorithms from Optimal Control Perspective

Congestion Control Algorithms from Optimal Control Perspecti...

引用

Joint 48th IEEE Conference on Decision and Control and 28th Chinese Control Conference

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

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. This work aims to investigate what dynamical functions the existing algorithms maximize(minimize). In particular, it is shown that there exist meaningful cost functionals whose minimization leads to the celebrated primal and dual congestion 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 realtime link capacity constraint, are imposed.

关键词： Congestion Control Algorithms from Optimal Control Perspective

来源：评论

学校读者我要写书评

暂无评论

Framework for statistical design of a flip-flop

Framework for statistical design of a flip-flop

引用

IEEE International Conference on Electronics, Circuits and systems (ICECS)

作者： Sayed Alireza Sadrossadat Minoo Mirsaeedi Kumaraswamy Ponnambalam Mohab Anis Department of Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada Department of Systems Design Engineering University of Waterloo Waterloo ONT Canada

ISBN: (纸本)9781424450909;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 impact the timing performance of sequential circuits which may eventually cause their malfunction. Therefore, developing a framework for designing such circuits is inevitable. Our framework generates the values of 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 improving the yield of flip-flops, less research was done to improve the timing yield in the presence of process variations.

关键词： Flip-flops Timing Clocks Microprocessors Digital circuits CMOS technology Process design Frequency Noise robustness Latches

来源：评论

学校读者我要写书评

暂无评论

Application of the latency insertion method to circuits with blackbox macromodel representation

Application of the latency insertion method to circuits with...

引用

Electronics Packaging Technology Conference (EPTC)

作者： José Schutt-Ainé Dmitri Klokotov Patrick Goh Jilin Tan Feras Al-Hawari Ping Liu Wenliang Dai Department of Electrical and Computer Engineering University of Illinois Urbana-Champaign USA Cadence Design Systems Inc. China

ISBN: (纸本)9781424450992

In this work the latency insertion method (LIM) is applied to the treatment of blackbox networks described by their frequency-domain scattering parameters. The method allows the simulation of passive macromodels in the LIM environment. This generalization allows LIM to simulate subnetworks with frequency-dependent parameters describing phenomena such as skin effect and substrate loss. The derivation of the algorithms is presented as well as simulation results to validate the method.

关键词： Delay Circuit simulation Computational modeling Frequency Voltage Scattering parameters Equations Integrated circuit interconnections SPICE Circuit analysis

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：