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检索条件"机构=Sch. of Elec. Engineering and Computer Science"

共 863 条记录，以下是611-620 订阅

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Watermarking for 3D polygonal meshes using normal vector distributions of each patch

Watermarking for 3D polygonal meshes using normal vector dis...

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Proceedings: 2003 International Conference on Image Processing, ICIP-2003

作者： Kwon, Ki-Ryong Kwon, Seong-Geun Lee, Suk-Hawn Kim, Tae-Su Lee, Kuhn-Il Department of Electronic Engineering Pusan University of Foreign Studies 55-1 Uam-Dong Nam-Gu Pusan 608-738 Korea Republic of R and D Group 3 Info./Communication Business Samsung Electronics Co. LTD. Sch. of Elec. Eng./Computer Science Kyungpook National University 1370 Sangyuk-Dong Buk-Gu Daegu 702-701 Korea Republic of

We proposed a watermarking for 3D polygonal meshes using normal vector distribution of each patch. The distribution of norm vector for 3D polygonal mesh is a consistent factor to be robust against various attacks such as af£ne transform and mesh connectivity altering. Therefore, the proposed algorithm embedded watermark into these consistent normal vectors and equal watermark bit was embedded into each patch of subdivided mesh to have robustness against the partial geometric deformation. Experiment results exhibited the proposed algorithm is robust by extracting watermark bit for various attacked models.

关键词： Image processing

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Value added: Integrating NSBE Jr. chapters into high sch.ol mathematics and science curricula

Value added: Integrating NSBE Jr. chapters into high school ...

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2003 ASEE Annual Conference and Exposition: Staying in Tune with engineering Education

作者： Woessner, David Jangha, Sundiata Gordon, Christal Edwards, Douglas Cowan, F. Scott Reid, Pamela Peltier, Richard Llewellyn, Donna Usselman, Marion George W. Woodruff Sch. Mech. Eng. Georgia Institute of Technology Dupree College of Management Georgia Institute of Technology Sch. of Elec. and Comp. Engineering Georgia Institute of Technology School of Chemical Engineering Georgia Institute of Technology Sch. of Earth and Atmosph. Science Georgia Institute of Technology Ctr. Enhancement of Teach. and Lrng. Georgia Institute of Technology Ctr. Educ. Integrating Sci. M./C. Georgia Institute of Technology Westlake High School Fulton County School System

The establishment of National Society of Black Engineers (NSBE) Jr. chapeters at high sch.ols is discussed to aid the entire engineering communities in various ways. Through the implementation of NSBE Jr. chapters the high sch.ol gains an additional academic and extracurricular outlet for its students. The high sch.ol is also able to form a relationship with the university associated with the NSBE chapter. The most important aspect of the involvement with the NSBE Jr. chapters for the graduate students and the members of Georgia Tech Society of Black Engineers (GTSBE) is the ability to share knowledge and experience with the high sch.ol students in an effort to aid them in making decisions and choices in their lives.

关键词： engineering education

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On Performance of an Equalization Algorithm based on Space and Time Diversity for Wireless Multimedia Services to Home Users

On Performance of an Equalization Algorithm based on Space a...

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作者： Fong, Bernard Rapajic, Predrag B. Hong, G.Y. Fong, A.C.M. Auckland University of Technology Private Bag 92006 Auckland 1020 New Zealand Sch. of Elec. Eng./Telecom. University of New South Wales Sydney NSW Australia Massey University Albany Campus North Shore Mail Center Private Bag 102904 Auckland New Zealand Computer Engineering Nanyang Technological University Singapore Singapore

Wireless networks often operate under harsh environmental conditions with many uncontrollable factors causing data corruption and network outage. Atmospheric phenomena such as rain and snow make signal reception difficult for such systems. Furthermore, factors such as multipath fading and depolarization due to rain attenuation can severely and adversely impact the performance of wireless networks. This paper presents an equalization algorithm that uses spatial and temporal diversity. By using such information of the received signal, it is possible to minimize the effects of intersymbol interference, and leads to a reduction in computational complexity. Results show that the proposed equalization algorithm offers a noticeable improvement with single-carrier modulated signals.

关键词： Wireless telec.mmunication systems

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A WDM Fiber-Radio System with Improved Optical Spectral Efficiency Incorporating Remote LO Delivery and Novel FBG Optical Filtering

A WDM Fiber-Radio System with Improved Optical Spectral Effi...

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Optical Fiber Communication Conference (OFC)

作者： Marra, C. Nirmalathas, A. Lim, C. Attygalle, M. Novak, D. Ashton, B. Poladian, L. Rowe, W. Wang, T. Reekie, L. Besley, J. Photonics Research Laboratory Australian Photonics CRC University of Melbourne Vic. 3010 Australia Corvis Subsea Columbia MD 21045 Optical Fibre Technology Centre APCRC University of Sydney Nsw 1430 Australia Australian Photonics CRC Sch. of Elec./Computer Engineering RMIT University Melbourne Australia JDS Uniphase Sydney NSW 2113 Australia

A WDM fiber radio system with improved spectral efficiency, incorporating remote LO delivery and FBG optical filtering techniques, is demonstrated. The network utilizes remote LO delivery together with multi-sector SCM signal transmission, using very narrowband optical filtering techniques via custom designed FBGs. Two different types of FBG designs are implemented and their performance is compared in an experimental system application. The results show that all channels within a 25 GHz band are successfully recovered with minimal degradation.

关键词： Radio systems

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Determining state of consciousness from the intracranial elec.roencephalogram (IEEG) for seizure prediction

Determining state of consciousness from the intracranial ele...

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22nd International Conference on Modelling Identification and Control

作者： Betterton, Perry D'Alessandro, Maryann Vachtsevanos, George Litt, Brian Georgia Institute of Technology Sch. of Elec./Computer Engineering 777 Atlantic Drive Atlanta GA 30332 United States University of Pennsylvania Department of Bioengineering Hayden Hall 3320 Smith Walk Philadelphia PA 19104 United States Department of Neurology Hosp. of the Univ. of Pennsylvania 3 West Gates 3400 Spruce Street Philadelphia PA 19104 United States

ISBN: (纸本)0889863393

Automated sleep staging plays an important role in evaluation and treatment of neurological disorders impacted by state of awareness. Recent work in seizure prediction demonstrates the need for on-line calculation of state of awareness from the intracranial elec.roencephalogram (IEEG) during measurement of seizure precursors. The aim of this work is to develop such a method for use as input to seizure prediction algorithms. To establish a reference point, data segments from a single patient were examined, and it was found that the power spectrum of the delta band (0 - 4 Hz) in the left temporal depth elec.rode contact closest to the occipital lobe was qualitatively "flatter" during wakefulness than during sleep. An algorithm was developed to quantify this observation and automatically classify signals as "awake" or "asleep," for comparison to behavioral classification of sleep state from video recordings. This algorithm was tested on 753 hours of data from a total of five patients, with average accuracy of 72.1%. One-minute segments were used;the first 1/3 of each patient's data was used for training, and the second 2/3 was used to assess accuracy. Subjective classification of state of consciousness, misalignment of visual classification and IEEG data, and attachment of disjoint data segments may have degraded accuracy. However, further refinement of these methods, calibrated to classical scoring of sleep stage on scalp EEG, could provide sufficient accuracy for use in real-time seizure prediction and intervention devices.

关键词： Neurology

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Erratum: Integer quantum hall effect between any two points in the system (Solid State Communications (2003) 127 (505-508) PII: S0038109803004228)

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Solid State Communications 2003年第11期128卷 441-441页

作者： Cui, Nai-Yi Surface Science Laboratory Sch. of Elec./Mech. Engineering University of Ulster at Coleraine Coleraine Co. Londonderry BT52 1SA United Kingdom

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Design of Miniaturized Telemetry Module for Bi-directional Wireless Endoscopes

Design of Miniaturized Telemetry Module for Bi-directional W...

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作者： Park, Hee-Joon Park, Il-Yong Lee, Jeong-Woo Song, Byung-Seop Won, Chul-Ho Cho, Jin-Ho Sch. of Elec. Eng./Computer Science Kyungpook National University Daegu 702-701 Korea Republic of Adv. Res. Ctr. Recovery of Hum. S. Kyungpook National University Daegu 700-721 Korea Republic of Department of Control Kyungil University Kyung-San Si 712-701 Korea Republic of Department of Biomedical Engineering School of Medicine Kyungpook National University Daegu 700-721 Korea Republic of

A bi-directional and multi-channel wireless telemetry capsule, 11 mm in diameter, is presented that can transmit video images from inside the human body and receive a control signal from an external control unit. The proposed telemetry capsule includes transmitting and receiving antennas, a demodulator, decoder, four LEDs, and CMOS image sensor, along with their driving circuits. The receiver demodulates the received signal radiated from the external control unit. Next, the decoder receives the stream of control signals and interprets five of the binary digits as an address code. Thereafter, the remaining signal is interpreted as four bits of binary data. Consequently, the proposed telemetry module can demodulate external signals so as to control the behavior of the camera and four LEDs during the transmission of video images. The proposed telemetry capsule can simultaneously transmit a video signal and receive a control signal determining the behavior of the capsule itself. As a result, the total power consumption of the telemetry capsule can be reduced by turning off the camera power during dead time and separately controlling the LEDs for proper illumination of the intestine.

关键词： Endoscopy

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Minimum verification error training for topic verification

Minimum verification error training for topic verification

引用

2003 IEEE International Conference on Accoustics, Speech, and Signal Processing

作者： Kuo, Hong-Kwang Jeff Lee, Chin-Hui Zitouni, Imed Fosler-Lussier, Eric Bell Labs Lucent Technologies 600 Mountain Ave. Murray Hill NJ 07974-0636 United States IBM T. J. Watson Research Center 1101 Kitchawan Road Route 134 Yorktown Heights NY 10598 United States Georgia Institute of Technology Sch. of Elec./Computer Engineering Atlanta GA 30332 United States Columbia University New York NY United States

In this paper we propose a new formulation of minimum verification error training and apply it to the problem of topic verification as an example. In topic verification, a decision is made as to whether a document truly belongs to a particular topic of interest. Such a decision typically depends on a comparison between a model for the desired topic and a model for background topics, using a decision threshold. We propose modeling the background topics as a cohort model consisting of a weighted combination of the ]M closest topics discovered from the training data. The weights and the decision threshold are optimized using the generalized probabilistic descent algorithm to explicitly minimize the verification error rate, which is defined to be a weighted sum of the Type I (false rejection) and Type II (false acceptance) errors.

关键词： Speech recognition

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Photorefractive polymers based on bis-trianlamine side-chain polymers

Photorefractive polymers based on bis-trianlamine side-chain...

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Organic Holographic Materials and Applications

作者： Fuentes-Hernandez, Canek Thomas, Jayan Termine, Roberto Eralp, Muhsin Yamamoto, Michiharu Cammack, Kevin Matsumoto, Kenji Barlow, Steve Walker, Gregory Meredith, Gerald Peyghambarian, Nasser Kippelen, Bernard Marder, Seth R. Optical Sciences Center University of Arizona Tucson AZ 85721 Nitto Denko Technical Corporation Oceanside CA 92054 Department of Chemistry University of Arizona Tucson AR 85721 Dipartimento di Chimica Università della Calabria 87036 Arcavacata di Rende Italy Sch. of Elec./Computer Engineering Georgia Institute of Technology Atlanta GA 30332 School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta GA 30332

We report on the photorefractive properties of two polymer composites that utilize a new bis-triarylamine side-chain polymer matrix. Correctly locating the frontier orbitals of the new transport manifold with respect to the HOMO levels of chromophores, allows stable continuous operation over exposure levels of more that 4 kJ/cm2 when samples are elec.rically biased at 57 V/μm. This operational stability is combined with video-rate compatible grating build-up times and a dynamic range that allows index modulations of 3 × 10-3 and gain coefficients on the order of 100 cm -1 at moderate fields. The thermal stability of one of the composites reported is excellent, showing no signs of phase separation even after one week at 60° C. A comparison with the stability of composites where the new matrix was replaced by PVK is also presented.

关键词： Polymers

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Analysis of mutations in the COLIA1 gene with second-order rule induction

Analysis of mutations in the COLIA1 gene with second-order r...

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作者： Hewett, Rattikorn Leuchner, John Mooney, Sean D. Klein, Teri E. Sch. of Elec. Eng./Computer Science Washington State University 14204 NE Salmon Creek Avenue Vancouver WA 98686-9600 United States Inst. for Hum. and Machine Cognition University of West Florida 40 South Alcaniz Pensacola FL 32501 United States Stanford Medical Informatics School of Medicine Stanford University X215 251 Campus Drive Stanford CA 94305-5479 United States

Mutations are structural changes in DNA that can cause protein malfunction and genetic disease. This paper describes a machine learning approach to analyzing mutations associated to Osteogenesis Imperfecta (OI), also known as brittle bone disease, We apply SORCER, a second-order rule induction system to predict clinical phenotypes of OI from mutation and neighboring amino acid sequences in the COLIA1 gene. On the average, over ten 10-fold cross-validations, SORCER gives more accurate results than C4.5 with average accuracy of about 81.2%. The paper discusses the advantages and limitations of SORCER and demonstrates its use to provide initial exploration of biological sequences.

关键词： Learning systems

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