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作者： Chen, Guang Han, Tony X. Lao, Shihong Electrical and Computer Engineering Dept. University of Missouri Columbia MO United States Core Technology Center Omron Corporation Kyoto Japan

ISBN: (纸本)9781457703942

The performance of an offline-trained classifier can be improved on-site by adapting the classifier towards newly acquired data. However, the adaptation rate is a tuning parameter affecting the performance gain substantially. Poor selection of the adaptation rate may worsen the performance of the original classifier. To solve this problem, we propose a conservative model adaptation method by considering the worst case during the adaptation process. We first construct a random cover of the set of the adaptation data from its partition. For each element in the cover (i.e. a portion of the whole adaptation data set), we define the cross-entropy error function in the form of logistic regression. The element in the cover with the maximum cross-entropy error corresponds to the worst case in the adaptation. Therefore we can convert the conservative model adaptation into the classic min-max optimization problem: finding the adaptation parameters that minimize the maximum of the cross-entropy errors of the cover. Taking the object detection as a testbed, we implement an adapted object detector based on binary classification. Under different adaptation scenarios and different datasets including PASCAL, ImageNet, INRIA, and TUD-Pedestrian, the proposed adaption method achieves significant performance gain and is compared favorably with the state-of-the-art adaptation method with the fine tuned adaptation rate. Without the need of tuning the adaptation rates, the proposed conservative model adaptation method can be extended to other adaptive classification tasks. © 2011 IEEE.

关键词： Errors

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R&D toward a compact high-brilliance X-ray source based on channeling radiation

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AIP Conference Proceedings 2012年第1期1507卷 734-739页

作者： P. Piot C. A. Brau W. E. Gabella B. K. Choi J. D. Jarvis J. W. Lewellen M. H. Mendenhall D. Mihalcea Northern Illinois Center for Accelerator & Detector Development and Department of Physics Northern Illinois University DeKalb IL 60115 USA and Accelerator Physics Center Fermi National Accelerator Laboratory Batavia IL 60510 USA Department of Physics and Astronomy Vanderbilt University Nashville TN 37235 USA Dept. of Electrical Engineering and Computer Science Vanderbilt University Nashville TN 37235 USA and Vanderbilt Institute of Nanoscale Science and Engineering Vanderbilt University Nashville TN 37235 USA Physics Department & Combat Systems Naval Postgraduate School Monterey CA 93943 USA Northern Illinois Center for Accelerator & Detector Development and Department of Physics Northern Illinois University DeKalb IL 60115 USA

X-rays have been valuable to a large number of fields including Science, Medicine, and Security. Yet, the availability of a compact high-spectral brilliance X-ray sources is limited. A technique to produce X-rays with spectral brilliance ℬ ∼ 1012 photons.(mm-mrd)−2. (0.1% BW)−1.s−1 is discussed. The method is based on the generation and acceleration of a low-emittance field-emitted electron bunches. The bunches are then focused on a diamond crystal thereby producing channeling radiation. In this paper, after presenting the overarching concept, we discuss the generation, acceleration and transport of the low-emittance bunches with parameters consistent with the production of high-brilliance X-rays through channeling radiation. We especially consider the example of the Advanced Superconducting Test Accelerator (ASTA) currently in construction at Fermilab where a proof-of-principle experiment is in preparation.

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Extracting BI-RADS features from Portuguese clinical texts

Extracting BI-RADS features from Portuguese clinical texts

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2012 IEEE International Conference on Bioinformatics and Biomedicine, BIBM2012

作者： Nassif, Houssam Cunha, Filipe Moreira, Inês C. Cruz-Correia, Ricardo Sousa, Eliana Page, David Burnside, Elizabeth Dutra, Inês University of Wisconsin Madison WI United States AroundKnowledge Porto Portugal Centro Hospitalar S. João Faculty of Medicine University of Porto Porto Portugal Superior School of Health Technology of Porto Vila Nova de Gaia Portugal INESC Porto Faculty of Engineering University of Porto Porto Portugal CINTESIS - Center for Research in Health Technologies and Information Systems Faculty of Medicine University of Porto Porto Portugal CIDES - Health Information and Decision Sciences Faculty of Medicine Universidade Do Porto Porto Portugal Dept. of Biostatistics and Medical Informatics UW-Madison United States Department of Radiology University of Wisconsin School of Medicine and Public Health Madison WI United States Department of Computer Science Faculty of Sciences University of Porto Porto Portugal

ISBN: (纸本)9781467325585

In this work we build the first BI-RADS parser for Portuguese free texts, modeled after existing approaches to extract BI-RADS features from English medical records. Our concept finder uses a semantic grammar based on the BI-RADS lexicon and on iterative transferred expert knowledge. We compare the performance of our algorithm to manual annotation by a specialist in mammography. Our results show that our parser's performance is comparable to the manual method. © 2012 IEEE.

关键词： Iterative methods

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XML-based reusable component repository for embedded software

XML-based reusable component repository for embedded softwar...

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35th Annual IEEE International computer Software and Applications Conference Workshops, COMPSACW 2011

作者： Chang, Chih-Hung Lu, Chih-Wei Chu, William C. Yang, Chao-Tung Hsiung, Pao-Ann Hsueh, Nien-Lin Koong, Chorng-Shiuh Shao, Kuei-Kai Dept. of Information Management Hsiuping Institute of Technology Taichung Taiwan Dept. of Computer Science Tunghai University Taichung Taiwan Dept. of Computer Science and Information Engineering National Chung Cheng University Chia-Yi Taiwan Dept. of Information Engineering and Computer Science Feng Chia University Taichung Taiwan Dept. of Computer and Information Science Taichung University Taichung City Taiwan Service Systems Technology Center Industrial Technology Research Institute Hsinchu Taiwan

ISBN: (纸本)9780769544595

In the development stage of the embedded system, the market demand and system development trend will be influence by the Time to Market. Reliable and fast system deployment is not easy to implement. Reduced price and system development time can increase the product value. Thus the component re-use library can help reduce the development time;this kind of design can reduce the emergence of rewriting and raise the efficiency by a wide margin. We design and study the reusable component in this research, proposing a prototype database based on XML. This technique has many advantages like reduces the time required for storage, improves the overall efficiency of the system, shortens the development time, increases reliability and reduces the risks handling etc. © 2011 IEEE.

关键词： XML

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Learning of context-aware single image super-resolution

Learning of context-aware single image super-resolution

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2011 IEEE Visual Communications and Image Processing, VCIP 2011

作者： Yang, Min-Chun Hu, Ting-Yao Wang, Chang-Heng Wang, Yu-Chiang Frank Research Center for Information Technology Innovation Academia Sinica Taipei Taiwan Dept. Computer Science and Information Engineering National Taiwan University Taipei Taiwan Dept. Electrical Engineering National Taiwan University Taipei Taiwan

ISBN: (纸本)9781457713200

We propose a novel learning-based method for single image super-resolution (SR). Given a low-resolution input image and its image pyramid, we advance a context-constrained image segmentation to construct a super-pixel database with different context categories for learning purposes. By utilizing context-specific image sparse representation, our method aims at modeling the relationship between the interpolated image patches and their ground truth pixels from different context categories via support vector regression (SVR). To produce the final SR output, we upsample the low-resolution input, followed by the refinement of each image patch using the SVR models observed from the associated context categories. Unlike prior learning-based SR methods, our approach advances a self-learning technique and does not assume the reoccurrence of image patches (within or across image scales). We do not need to collect training low/high-resolution image data in advance either. Empirical results verify the effectiveness of our SR approach, which quantitatively and qualitatively outperforms existing interpolation or learning-based SR methods in most cases. © 2011 IEEE.

关键词： Image segmentation

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Simplified Expression of the Average Rate of Cellular Networks Using Stochastic Geometry

Simplified Expression of the Average Rate of Cellular Networ...

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IEEE International Conference on Communications

作者： Alessandro Guidotti Marco Di Renzo Giovanni E. Corazza Fortunato Santucci University of Bologna Dept. of Electronics Computer Engineering and Systems (DEIS) L2S UMR 8506 CNRS - SUPELEC - Univ Paris-Sud Laboratory of Signals and Systems (L2S) French National Center for Scientific Research (CNRS) Ecole Superieure d'Electricite (SUPELEC) University of Paris-Sud XI (UPS) University of L'Aquila Dept. of Electrical and Information Engineering Center of Excellence DEWS

ISBN: (纸本)9781457720529

Accurate modeling of network interference, deep understanding of its impact on the achievable performance, and development of efficient techniques to mitigate or exploit it are three important and fundamental research assets in current and next-generation cellular networks. In this context, Andrews, Baccelli, and Ganti [1] have recently introduced a new analytical approach to estimate coverage and rate of cellular networks subject to other-cell interference. In this paper, we move from the approach developed in [1], and propose an alternative analytical derivation to compute the rate of cellular networks. More specifically, by using stochastic geometry and Poisson point processes theory, we derive a simple and easy-to-compute expression of the rate, which can be used for arbitrary network and channel parameters, e.g., path-loss exponent, receiver noise, density of Base Stations (BSs), etc. Compared to [1], our framework has two main distinguishable features: i) the rate can be computed via a single numerical integral, rather than via a three-fold numerical integral;and ii) the formula is applicable to arbitrary fading distributions on the intended link, rather than being useful for Rayleigh fading only. Our analytical derivation is substantiated through extensive Monte Carlo simulations.

关键词： Cellular networks random geometry Monte Carlo technique

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Multi-target device-free tracking using radio frequency tomography

Multi-target device-free tracking using radio frequency tomo...

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2011 7th International Conference on Intelligent Sensors, Sensor Networks and Information Processing, ISSNIP 2011

作者： Nannuru, Santosh Li, Yunpeng Coates, Mark Yang, Bo Dept. of Electrical and Computer Engineering McGill University Montreal QC Canada Multimedia Technology Center Beijing Univ. of Posts and Telecom. Beijing China

ISBN: (纸本)9781457706738

This paper examines device-free tracking of multiple targets based on radio-frequency received signal strength (RSS) measurements recorded by a sensor network. We report experimental results that validate, for relatively uncluttered outdoor environments, a recently proposed model in which targets cause additive attenuation. Using this model, we examine the performance of three multi-target tracking algorithms using a experimental sensor network testbed consisting of 24 nodes that conducts surveillance of an outdoor area of size 50m2. The experiments are restricted to the case of a fixed number of targets (up to four). For four targets, all algorithms are able to track with average error less than 1m (as measured using the second-order OMAT metric);for two targets the error is close to 0.2m. © 2011 IEEE.

关键词： Sensor nodes

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Perspective On Gallium Nitride

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MRS Online Proceedings Library 2011年第1期162卷 515-524页

作者： Pankove, Jacques I. Center for Optoelectronic Computing Systems Dept. of Electrical and Computer Engineering University of Colorado at Boulder Boulder United States Center for Optoelectronic Computing Systems Dept. of Electrical and Computer Engineering Solar Energy Research Institute Golden United States

This paper is a historical review (mostly personal) of some major developments in this wide, direct gap material. It includes key technologies of synthesis, electrical and optical properties and many applications.

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Fractional gain scheduled controller for a networked smart wheel: Experimental results

Fractional gain scheduled controller for a networked smart w...

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作者： Tejado, Inés Vinagre, Blas M. Chen, Yang Quan Industrial Engineering School University of Extremadura 06006 Badajoz Spain Center for Self-Organizing and Intelligent Systems Dept. of Electrical and Computer Engineering Utah State University Logan UT 84322 United States

ISBN: (纸本)9783902661937

The performance of Networked Control systems (NCS) is directly affected mainly by time-varying network delays, so a specific approach to compensate their effects is usually required during the controller design process. This paper deals with the control of an experimental platform over the Internet by applying a novel fractional gain scheduling strategy which enables an existing fractional order PI controller for effcient control over the network. The proposed controller introduces delay-adaptive gains, which are optimal with respect to the current network condition. Experimental results show the effectiveness of the proposed controller, providing significantly better system performance, especially when the network-induced delay is increased in certain circumstances. © 2011 IFAC.

关键词： Networked control systems

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P-12: Enhanced Pentacene OTFTs with Suspended Source/Drain Electrode

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SID Symposium Digest of Technical Papers 2012年第1期38卷

作者： Yong-Hoon Kim Yong Uk Lee Jeong-In Han Sang-Myeon Han Woocheul Lee Min-Koo Han Young-Hwan Park Myung-Hwan Oh Jungwon Kang Information Display Research Center Korea Electronics Technology Institute Gyeonggi Korea School of Electrical Engineering and Computer Science Seoul National University Seoul Korea Dept. of Electronics and Computer Engineering Dankook University Sqeoul Korea

We have proposed and fabricated a new triisopropylsilyl (TIPS) pentacene organic thin-film transistor (OTFT) by employing suspended source/drain (SSD) electrode which successfully improves the electrical properties such as field-effect mobility, on/off ratio, threshold voltage (V TH ) and subthreshold slope compared to conventional bottom-contact OTFTs. The SSD electrode was fabricated by using Cr/Au double layer where the Cr was used as a sacrificial layer. By completely etching the Cr layer in the active area, a suspended Au source/drain structure is constructed forming a top-contact-like geometry. The field-effect mobility of ink-jet printed TIPS pentacene OTFT increased from 0.007 cm 2 /Vs to 0.066 cm 2 /Vs, on/off ratio increased from 10 4 to 10 6 , V TH decreased from +9 V to −3 V and subthreshold slope decreased from 4.5 V/decade to 0.9 V/decade.

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