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2006 IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Byoung Hun Kang John T. Wen Department of Mechanical Design Engineering Korea Polytechnic University Kyunggi South Korea Mechanical AeroSpace and Nuclear Engineering Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy NY USA

Due to their monolithic construction and superior wear and loss properties, flexure joints have been used to reduce the mechanism size and increase the positioning accuracy. The compliance of flexure joints, however, can affect the static and dynamic characteristics of the overall mechanism. To design mechanisms containing flexure joints, we have proposed a multi-objective optimization approach to take into account the multitude of performance metrics and design constraints. A Pareto frontier is first computed, and secondary design criteria, such as sensitivity and dynamic characteristics, are then applied to select the final design. To reduce the computation load and facilitate design iteration, a lumped spring approximation, the Paros-Weisbord model, is used to characterize the flexure joints and the pseudo-rigid-body model is used as an approximate description of mechanisms. This paper presents this approach applied to the design of a micro-gripper. The performance metrics are chosen to be the manipulability of the gripper opening and the decoupling of a stiffness matrix (reflecting the remote center of compliance criterion). Different design and initial fabrication results are included

关键词： Micromechanical devices Grippers design optimization Topology Stress design engineering Fabrication Assembly Aerodynamics Measurement

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Scalability Evaluation of a Hybrid Routing Architecture for Multi-FPGA systems

Scalability Evaluation of a Hybrid Routing Architecture for ...

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International Conference on Microelectronics, ICM

作者： Mohammed A. S. Khalid Viktor Salitrennik Department of Electrical and Computer Engineering University of Windsor Windsor ONT Canada Cadence Design Systems Inc. San Jose CA USA

Multi-FPGA systems (MFSs) are used as custom computing machines, logic emulators, and rapid prototyping vehicles. A key aspect of these systems is their programmable routing architecture which is the manner in which wires, FPGAs, and Field-Programmable Interconnect Devices (FPIDs) are connected. Several routing architectures for MFSs have been proposed and previous research has shown that the partial crossbar is one of the best existing architectures. A new routing architecture, called the Hybrid Complete-Graph and Partial- Crossbar (HCGP), was proposed by Khalid and was shown to provide superior speed and cost compared to partial crossbar. In this paper we address the issue of scalability of the HCGP routing architecture. The motivation for this work was to evaluate the suitability of the HCGP architecture for a future rapid prototyping system product that was being developed at Cadence. Experimental results show that the HCGP architecture is scalable and can be used with the state-of-the-art, high gate count FPGAs.

关键词： Scalability Routing Field programmable gate arrays computer architecture Costs Switches Prototypes Integrated circuit interconnections Wires Reconfigurable logic

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Latency Insertion Method with Frequency Dependent Effect

Latency Insertion Method with Frequency Dependent Effect

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Electronics System-Integration Technology Conference, ESTC

作者： Z. Deng J. Schutt-Aine J. Tan C. Kumar D. Milosevic Department of Electrical and Computer Engineering University of Illinois Urbana-Champaign Urbana IL USA Cadence Design Systems Inc. Chelmsford MA USA

This paper presents an extension of the latency insertion method (LIM) to the treatment of circuits with frequency-dependent parameters. In particular, the skin effect of conductors is modeled in the formulation and t... 详细信息

关键词： Delay Frequency dependence Skin effect Conductors Circuit simulation Voltage Finite difference methods Time domain analysis Space technology Dielectric losses

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Modular-Based Classifier for Phoneme Recognition

Modular-Based Classifier for Phoneme Recognition

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IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)

作者： Abbas Ahmadi Fakhri Karray Mohamed Kamel Systems Design Engineering Department Pattern Analysis and Machine Intelligence Laboratory Waterloo ONT Canada Electrical and Computer Engineering Department Pattern Analysis and Machine Intelligence Laboratory Waterloo ONT Canada

This paper proposes a modular-based classifier for the problem of phoneme recognition. This is carried out by the use of a two-level classification approach including, high and low levels. We propose a new concept called phoneme family. To obtain phoneme families, we employ k-mean clustering method. A given unknown phoneme is first classified into a phoneme family at high level classification. Then, the exact label of the phoneme is determined at low level classification. We have used a combined framework of statistical and neural network based classifiers. Encouraging results are obtained by applying the proposed method on TIMIT database and its performance is compared against other methods

关键词： Neural networks Speech recognition Recurrent neural networks Pattern recognition design engineering Databases Network topology Signal processing Information technology Pattern analysis

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Opposition-based Q(λ) algorithm

Opposition-based Q(λ) algorithm

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International Joint Conference on Neural Networks 2006, IJCNN '06

作者： Shokri, Maryam Tizhoosh, Hamid R. Kamel, Mohamed Pattern Analysis and Machine Intelligence Laboratory Department of Systems Design Engineering University of Waterloo 200 University Avenue West ON N2L 3G1 Canada Pattern Analysis and Machine Intelligence Laboratory Department of Electrical and Computer Engineering University of Waterloo 200 University Avenue West ON N2L 3G1 Canada

ISBN: (纸本)0780394909

The problem of delayed reward in reinforcement learning is usually tackled by implementing the mechanism of eligibility traces. In this paper we introduce an extension of eligibility traces to solve one of the challenging problems in reinforcement learning. The concept of opposition traces is proposed in this work to deal with large state space problems in reinforcement learning applications. We combine the idea of opposition and eligibility traces to construct the oppositionbased Q(λ). The results are compared with the conventional Watkins' Q(λ) and reflect a remarkable performance increase. © 2006 IEEE.

关键词： Reinforcement learning

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Evaluating Cisco e-learning Courses Modified for the Vision Impaired

Evaluating Cisco e-learning Courses Modified for the Vision ...

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International Conference on Information Technology Based Higher Education and Training, ITHET

作者： Helen L. Armstrong Iain D. Murray Ruchi R. Permvattana School of Information Systems Curtin University of Technology Australia Department Electrical & Computer Engineering Curtin University research into multimodal HCI Australia Research Associate with the Department Electrical & Computer Engineering research in the design of on-line environments for the vision impaired Curtin University of Technology Australia

The needs of vision impaired students are quite different to sighted students. The increasing use of e-learning means higher education must move to multi-modal user interfaces in order to make e-learning materials accessible to all students. E-Learning materials (particularly in the sciences and technology) are predominantly visual, presented via computer keyboard and screen. Software and devices designed to aid the vision impaired are unable to decipher most images and visual- centric objects contained in e-learning materials. This paper discusses a project undertaken over the past two years to modify the content and presentation of Cisco certification e-learning courses to enable accessibility by vision impaired and blind students. These modifications necessitated rewriting the learning materials so they could be effectively presented via multi-modal user interfaces to vision impaired students, involving speech, audio, haptics and force-feed devices and methods. Evaluation of sections of the project by the vision impaired students using a model based upon Stufflebeam's CIPP model and Kirkpatrick's Four-Level training program evaluation model has been carried out and the results are presented.

关键词： Electronic learning User interfaces Educational programs computer science education computer vision Graphics Face detection Materials science and technology Keyboards Software design

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On the reliability issues of RF CMOS devices

On the reliability issues of RF CMOS devices

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ICSICT-2006: 2006 8th International Conference on Solid-State and Integrated Circuit Technology

作者： Wong, Hei Fu, Yue Liou, J.J. Yue, Yun Iwai, Hiroshi Dept. of Electronic Engineering City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong Frontier Collaborative Research Center Tokyo Institute of Technology Nagatsuta Yokohama 226-8502 Japan Department of Electrical and Computer Engineering University of Central Florida Orlando FL 32816 United States RF/MS Design Group Conexant Systems Palm Bay FL 32905 United States

ISBN: (纸本)1424401615

Although multi-finger MOS structures have demonstrated very attractive behaviors for high-frequency analog circuit applications, the shared drain and source regions for adjacent gate fingers have led to current crowding and results in the finger number-dependent current-voltage characteristics. In addition, the high current density spots near the drain region would deteriorate the MOS reliability in several aspects. Present results suggest that the common drain regions should be wider and more heavily doped in order to alleviate these effects. © 2006 IEEE.

关键词： CMOS integrated circuits

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Opposition-Based Q(λ) Algorithm

Opposition-Based Q(λ) Algorithm

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International Joint Conference on Neural Networks (IJCNN)

作者： M. Shokri H.R. Tizhoosh M. Kamel Pattern Analysis and Machine Intelligence Laboratory Department of Systems Design Engineering University of Waterloo ONT Canada Pattern Analysis and Machine Intelligence Laboratory Department of Electrical and Computer Engineering University of Waterloo ONT Canada

The problem of delayed reward in reinforcement learning is usually tackled by implementing the mechanism of eligibility traces. In this paper we introduce an extension of eligibility traces to solve one of the challenging problems in reinforcement learning. The concept of opposition traces is proposed in this work to deal with large state space problems in reinforcement learning applications. We combine the idea of opposition and eligibility traces to construct the opposition-based Q(lambda). The results are compared with the conventional Watkins' Q(lambda) and reflect a remarkable performance increase.

关键词： Learning Delay Acceleration Neural networks Pattern analysis Machine intelligence Laboratories System analysis and design design engineering systems engineering and theory

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A NEW APPROACH TO CHARACTERIZE AND PREDICT LIFETIME OF DEEP-SUBMICRON NMOS DEVICES

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International Journal of High Speed Electronics and systems 2006年第1期16卷 315-323页

作者： ZHI CUI JUIN J. LIOU YUN YUE HEI WONG Electrical and Computer Engineering Dept. University of Central Florida Orlando Florida 32816 USA RF/MS Design Group Conexant Systems Palm Bay Florida 32905 USA Electronics Engineering Dept. City University of Hong Kong Kowloon Hong Kong China

Experimental results are presented to indicate that the widely used power-law models for lifetime estimation are questionable for deep submicron (< 0.25 μm) MOS devices, particularly for the case of large substrate current stressing. This observation is attributed to the presence of current components, such as the gate tunneling current and base current of parasitic bipolar transistor, that do not induce device degradation. A more effective extrapolation method is proposed as an alternative for the reliability characterization of deep-submicron MOS devices.

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Spectral Content Characterization for Efficient Image Detection Algorithm design

Spectral Content Characterization for Efficient Image Detect...

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International Conference on computer and Information Technology (CIT)

作者： Kyoung-su Park Sangjin Hong Peom Park Mobile Systems Design Laboratory Department of Electrical and Computer Engineering Stony Brook University-SUNY Stony Brook NY USA Department of Industrial and Information Engineering Ajou University Humintec Company Limited Suwon South Korea

This paper presents spectral characterization for efficient image detection using hyperspectral processing technique. We investigate relationship between the number of bands used in the detection so that the minimum number of bands are used in the processing. This approach reduces computation and implementation complexity of the algorithms. Specifically, we considered contribution coefficient by each band and based on this coefficient, we heuristically select the bands for processing. We have shown that for effective detection, only small number of bands are needed.

关键词： Detection algorithms Algorithm design and analysis Hyperspectral imaging Hyperspectral sensors Signal processing algorithms Image edge detection Image processing Libraries Object detection Mobile computing

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