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Proceedings of the 36th Annual Hawaii International Conference on System Sciences, HICSS 2003 2003年 123-124页

作者： Chen, P. Bryan, George Vouk, Mladen Potok, Thomas E. Elmore, Mark Department of Computer Science Louisiana State University United States Centre for Advanced Systems Engineering University of Western Sydney Australia Department of Computer Science North Carolina State University United States Applied Software Engineering Research Group Oak Ridge National Laboratory United States

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Automatic face region tracking for highly accurate face recognition in unconstrained environments

Automatic face region tracking for highly accurate face reco...

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IEEE Conference on advanced Video and Signal Based Surveillance (AVSS)

作者： Y.-O. Kim J. Paik Jingu Heo A. Koschan B. Abidi M. Abidi Korea Electronics and Technology Institute Puchon Gyeonggi South Korea Image Processing Laboratory Department of Image Engineering Graduate School of Advanced Imaging Science Multimedia and Film Chung-Ang University Seoul South Korea Imaging Robotics and Intelligent Systems Laboratory Department of Electrical and Computer Engineering University of Tennessee Knoxville USA

We present a combined real-time face region tracking and highly accurate face recognition technique for an intelligent surveillance system. High-resolution face images are very important to achieving accurate identification of a human face. Conventional surveillance or security systems, however, usually provide poor image quality because they use only fixed cameras to record scenes passively. We have implemented a real-time surveillance system that tracks a moving face using four pan-tilt-zoom (PTZ) cameras. While tracking, the region-of-interest (ROI) can be obtained by using a low-pass filter and background subtraction with the PTZ. Color information in the ROI is updated to extract features for optimal tracking and zooming. FaceIt/sup /spl reg//, which is one of the most popular face recognition software packages, is evaluated and then used to recognize the faces from the video signal. Experimentation with real human faces showed highly acceptable results in the sense of both accuracy and computational efficiency.

关键词： Face recognition Surveillance Real time systems Humans Cameras Intelligent systems Security Image quality Layout Low pass filters

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A survey of methods for detection of stator related faults in induction machines

A survey of methods for detection of stator related faults i...

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IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)

作者： R.M. Tallam S.B. Lee G. Stone G.B. Kliman J. Yoo T.G. Habetler R.G. Harley Advanced Technology Milwaukee WI USA Electrical Machines and Drives Laboratory GE Global Research Center Schenectady NY USA Iris Power Engineering Limited Toronto ONT Canada Department of Electrical and Computer Systems Engineering Rensselaer Polytechnic Institute Troy NY USA Department of Electrical Engineering Korea University Seoul South Korea Georgia Institute of Technology School of Electrical and Computer Engineering Atlanta GA USA

As evidenced by industrial surveys, stator related failures account for a large percentage of faults in induction machines. The objective of this paper is to provide a survey of existing techniques for detection of stator related faults, which include stator winding turn faults, stator core faults, temperature monitoring and thermal protection, and stator winding insulation testing. The root causes of fault inception, available techniques for detection and recommendations for further research are presented. Although the primary focus is on-line, sensorless methods that use machine voltages and currents to extract fault signatures, off-line techniques such as partial discharge detection are also examined.

关键词： Fault detection Induction machines Stator cores Stator windings Temperature sensors Temperature measurement Condition monitoring Protection Insulation testing Voltage

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Resolving multiple occluded layers in augmented reality

Resolving multiple occluded layers in augmented reality

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International Symposium on Mixed and Augmented Reality (ISMAR)

作者： M.A. Livingston J.E. Swan J.L. Gabbard T.H. Hollerer D. Hix S.J. Julier Y. Baillot D. Brown Virtual Reality Laboratory Naval Research Laboratory Inc. Washington D.C. DC USA Naval Research Laboratory Inc. USA Systems Research Center Virginia Polytechnic Inst. State University USA Department of Computer Science University of California Santa Barbara USA Naval Research Laboratory Inc. Washington D.C. DC USA ITT Advanced Engineering and Sciences Naval Research Laboratory Inc. Washington D.C. DC USA Virtual Reality Laboratory Naval Research Laboratory Inc. USA

A useful function of augmented reality (AR) systems is their ability to visualize occluded infrastructure directly in a user's view of the environment. This is especially important for our application context, which utilizes mobile AR for navigation and other operations in an urban environment. A key problem in the AR field is how to best depict occluded objects in such a way that the viewer can correctly infer the depth relationships between different physical and virtual objects. Showing a single occluded object with no depth context presents an ambiguous picture to the user. But showing all occluded objects in the environments leads to the "Superman's X-ray vision" problem, in which the user sees too much information to make sense of the depth relationships of objects. Our efforts differ qualitatively from previous work in AR occlusion, because our application domain involves far-field occluded objects, which are tens of meters distant from the user. Previous work has focused on near-field occluded objects, which are within or just beyond arm's reach, and which use different perceptual cues. We designed and evaluated a number of sets of display attributes. We then conducted a user study to determine which representations best express occlusion relationships among far-field objects. We identify a drawing style and opacity settings that enable the user to accurately interpret three layers of occluded objects, even in the absence of perspective constraints.

关键词： Augmented reality Visualization Laboratories Displays Navigation Context awareness Human factors Switches Virtual reality computer science

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Human systems integration and advanced technology in engineering department workload and manpower reduction

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NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central Control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

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Comparative analysis of double-edge versus single-edge triggered clocked storage elements

Comparative analysis of double-edge versus single-edge trigg...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： N. Nedovic M. Aleksic V.G. Oklobdzija Advanced Computer Systems Engineering Laboratory University of California슠Davis CA USA

We present a comparison of Double-Edge Triggered clocked Storage Elements (DETSE) with their single-edge triggered counterparts in terms of delay and power consumption. In general, Latch-Mux based DETSE perform better then their single-edge counterparts while double-edge triggered flip-flops exhibit performance degradation. Up to 15% improvement in Energy-Delay Product (EDP) of Latch-Mux designs is achieved when using DETSE. The presented results indicate that the use of DETSE is a good choice when low-power operation is required.

关键词： Clocks Flip-flops Latches Delay Degradation Energy consumption Frequency Uncertainty Master-slave Power engineering computing

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Affecting the accuracy of an active vision head 2nd

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2nd Hellenic Conference on Artificial Intelligence, SETN 2002

作者： Gasteratos, Antonios Sandini, Giulio Laboratory of Electronics Section of Electronics and Information Systems Technology Department of Electrical and Computer Engineering Democritus University of Thrace XanthiGR-671 00 Greece Laboratory for Integrated Advanced Robotics Department of Communication Computer and System Sciences University of Genoa Viale Causa 13 GenoaI-16145 Italy

ISBN: (纸本)3540434720

In any measuring system the categorization of the error generation factors leads to simplification of complex error problems and to higher suppression of the error. In this paper we categorize, quantify and analyze the errors that affect a binocular active vision head. Simulations have been made and experimental results on a high resolution pan-tilt-vergence mechanism are also proposed. As a conclusion it can be said that the system performs optimal when it is initialized so that the two cameras are perfectly aligned and perpendicular to the baseline. Small variations in the vergence angle or small horizontal deviations of the principal point alters the measurement dramatically. On the other hand, variations in pan and tilt and vertical deviations of the principal point, affect the measurement insignificantly. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Errors

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Conditional pre-charge techniques for power-efficient dual-edge clocking

Conditional pre-charge techniques for power-efficient dual-e...

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International Symposium on Low Power Electronics and Design (ISLPED)

作者： N. Nedovic M. Aleksic V.G. Oklobdzija Advanced Computer Systems Engineering Laboratory ECE Department University of California Davis CA USA

A new dual edge-triggered flip-flop that saves power by inhibiting transitions of the nodes that are not used to change the state is presented. The proposed flip-flop is 12% faster with 10% lower energy-delay product for 50% data activity, as compared to the previously published dual edge-triggered storage elements. This was confirmed by simulation using 0.18/spl mu/m process, 1.8V power supply, and clock frequency of 250MHz. This flip-flop is particularly suitable for low-power applications.

关键词： Clocks Flip-flops Energy consumption Laboratories Power engineering computing Power engineering and energy Frequency Uncertainty systems engineering and theory Timing

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Entire region filling in indoor environments using neural networks

Entire region filling in indoor environments using neural ne...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Chaomin Luo S.X. Yang M. Meng Advanced Robotics and Intelligent Systems (ARIS) Laboratory School of Engineering University of Guelph Guelph Canada Department of Electrical and Computer Engineering University of Alberta Edmonton Canada

Entire region filling is a special type of robot path planning strategy that requires the mobile robot to cover every part of the whole workspace, which has many applications such as cleaning robots, vacuum cleaners, painter robots, land mine detectors, lawn mowers, and window cleaners. In this paper, a novel biologically inspired neural network approach is proposed for entire region filling with obstacle avoidance of a mobile cleaning robot in a nonstationary environment. The dynamics of each neuron in the topologically organized neural network is characterized by a shunting equation or an additive equation derived from Hodgkin and Huxley's (1952) membrane equation. There are only local lateral connections among neurons. Thus the computational complexity linearly depends on the neural network size. The robot path is autonomously generated from the dynamic activity landscape of the neural network and the previous robot location. The proposed model algorithm is computationally efficient. It can deal with an unstructured environment with irregular obstacles. The effectiveness of the proposed model is demonstrated by simulation results.

关键词： Filling Indoor environments Neural networks Mobile robots Equations Cleaning Landmine detection Neurons Computational modeling Path planning

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Hybrid access scheme based on one phase preamble and channel monitoring/allocation for satellite Internet communications

Hybrid access scheme based on one phase preamble and channel...

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IEEE Conference on Vehicular Technology (VTC)

作者： Hyun-Ho Choi Sun-Ho Lee Dong-Ho Cho Communication and Information Systems Laboratory Department of Electrical Engineering& Computer Science Korea Advanced Institute of Science and Technology Daejeon South Korea

The access scheme is required to have fast access and reliable transmission in satellite communications because of the long propagation delay and different channel characteristics. In this paper we propose a hybrid access scheme based on one phase preamble and channel monitoring/allocation for satellite communications. For fast access, we use an access scheme of 3GPP2 using one phase preamble instead of 3GPP using two phase preambles, and for more reliable transmission, the CM/CA scheme of 3GPP is applied. We investigate the performance of these proposed schemes through simulation. According to the simulation results, we could improve the random access scheme and could support smaller delay in satellite environments.

关键词： Base stations Principal component analysis Satellite communication Probes computerized monitoring Propagation delay Artificial satellites Internet Information systems computer science

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