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Coarse-grained dynamically reconfigurable architecture with flexible reliability

Coarse-grained dynamically reconfigurable architecture with ...

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International Conference on Field Programmable Logic and Applications

作者： Dawood Alnajiar Younghun Ko Takashi Imagawa Hiroaki Konoura Masayuki Hiromoto Yukio Mitsuyama Masanori Hashimoto Hiroyuki Ochi Takao Onoye Dept. Information Systems Engineering Osaka University Japan Science and Technology Corporation-CREST Japan Dept. Information Systems Engineering Osaka University Japan Dept. Communications and Computer Engineering Kyoto University Japan & JST CREST

This paper proposes a coarse-grained dynamically reconfigurable architecture, which offers flexible reliability to soft errors and aging. A notion of cluster is introduced as a basic element of the proposed architecture, each of which can select four operation modes with different levels of spatial redundancy and area-efficiency. Evaluation of permanent error rates demonstrates that four different reliability levels can be achieved by the proposed architecture. We also evaluate aging effect due to NBTI, and illustrate that alternating active cells with resting ones periodically will greatly mitigate the aging process with negligible power overhead. The area of additional circuits to attain immunity to soft errors and reliability configuration is 26.6% of the proposed reconfigurable device. Finally, a fault-tolerance evaluation of Viterbi decoder mapped on the proposed architecture suggests that there is a considerable trade-off between reliability and area overhead.

关键词： Reconfigurable architectures Aging Redundancy Error analysis Niobium compounds Titanium compounds Circuits Fault tolerance Viterbi algorithm Decoding

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Low-Cost Wideband Antenna Arrays on Glass Substrate for ISM Band Applications

Low-Cost Wideband Antenna Arrays on Glass Substrate for ISM ...

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European Conference on Antennas and Propagation

作者： Theodore Vasiliadis George Sergiadis Trinity Systems Telecom Lab Electrical & Computer Engineering Dept. Aristotle University of Thessaloniki

ISBN: (纸本)9781424447534

In this paper we present the methodology and guidelines for the fabrication of wideband planar antenna arrays, for ISM band applications. The fabrication is carried-out by hand using off-the-shelf components, ensuring an extremely low-cost process and rapid prototyping. The methodology is addressed to radio amateurs, or less skilled individuals wishing to deploy WLAN networks in a quick and inexpensive manner.

关键词： Glass substrates ISM band Ham radios Antenna arrays broadband planar antenna arrays fabrication Hand

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Experimental evaluation of a hybrid MPC strategy for vehicle start-up with an Automated Manual Transmission 10

Experimental evaluation of a hybrid MPC strategy for vehicle...

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2009 10th European control Conference, ECC 2009

作者： Amari, Rachid Tona, Paolino Alamir, Mazen IFP Powertrain Engineering BP3 Vernaison69390 France Gipsa-Lab Control Systems Dept. Sysco-Group Rue de la Houille Blanche St. Martin d'Hères France

ISBN: (纸本)9783952417393

In this paper, an experimental evaluation is presented for a Model Predictive control (MPC) algorithm controlling powertrains dynamics in vehicles with Automated Manual Transmissions (AMTs). This model based control enables online optimization by using sub-optimal solutions directly linked to the accelerator pedal position. Transmission stability constraints are explicitly handled as well as saturations on the control inputs. This MPC control is tested on line during vehicle start-up in a mild hybrid city car demonstrator equipped with a natural gas engine. A comparison with a PI-based control is made to show the convenience of the proposed MPC control. © 2009 EUCA.

关键词： Model predictive control

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Autonomously normalized horizontal differentials as features for HMM-based omni font-written OCR systems for cursively scripted languages

Autonomously normalized horizontal differentials as features...

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2009 IEEE International Conference on Signal and Image Processing Applications, ICSIPA09

作者： Attia, Mohamed Rashwan, Mohsen A.A. El-Mahallawy, Mohamed S.M. Engineering Company for the Development of Computer Systems RDI Egypt Dept. of Electronics and Electrical Communication Faculty of Eng. Cairo Univ. Egypt Arab Academy for Science and Technology and Maritime Transport AAST-MT Egypt

ISBN: (纸本)9781424455614

Automatic font-written Optical Character Recognition (OCR) is highly desirable for numerous modern information technology (IT) applications. Reliable font-written OCR's for Latin scripts are readily in use since long. For cursively scripted languages, that are the mother tongues of over one fourth of the world population, such OCR's are however not available at a robust and reliable performance. In this regard, the main challenge is the mandatory connectivity of characters/ligatures (i.e. graphemes) that has to be resolved simultaneously upon the recognition of these graphemes. Among the various approaches tried over decades, Hidden Markov Models (HMM)-based OCR's seem to be the most promising as they capitalize on the ability of HMM decoders to achieve segmentation and recognition simultaneously similar to the widely used HMM-based automatic speech recognition (ASR). Unlike ASR's, what is missing in HMM-based OCR's is the definition of a rigorously founded features vector capable to robustly achieving minimal "font type/size-independent" (omnifont) word error rates comparable to those realized with Latin scripts. Here comes the contribution of this paper that introduces such a sound features vector design, and experimentally shows its superiority in this regard.

关键词： Optical character recognition

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A study on the digital watermarking technique for JPEG 2000 09

A study on the digital watermarking technique for JPEG 2000

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International Conference on Convergence and Hybrid Information Technology 2009, ICHIT 2009

作者： Lim, Sung Jin Moon, Hae-Min Chung, Yongwha Pan, Sung Bum Dept. of Information and Communication Engineering Chosun Univ. 375 Seosuk-dong Dong-gu Gwangju 501-759 Korea Republic of Dept. of Computer and Information Science Korea Univ. Sejong Campus Jochiwon-eup Yeongigun Chungnam 339-700 Korea Republic of Dept. of Control Instrumentation and Robot Engineering Chosun Univ. 375 Seosuk-dong Dong-gu Gwangju 501-759 Korea Republic of

ISBN: (纸本)9781605586625

Recently, according to the number of Internet in widely use and the development of the related application, the distribution and use of multimedia contents, such as digital images, are very easy. Since these can modify as easy as use, multimedia contents need newly compressed JPEG 2000 and digital watermarking technique because of its enormous amount of information. To protect the digital image in real-time, this paper proposes two methods that Dual Watermarking Method (DWM) based JPEG 2000 and performing JPEG 2000 and watermarking synchronously. DWM consists of the robust and fragile watermarking. Also, in DWM, watermarks are carefully embedded avoiding the areas of Region Of Interest (ROI) and the edge of the digital image to protect the integrity of it. In performing JPEG 2000 and watermarking, it takes considerably less time to do JPEG 2000 and watermarking than when they are done separately. Based on the experimental results, it takes 0.72 second for JPEG 2000 and watermarking, and 1.11 second when they are done separately. © 2009 ACM.

关键词： Image segmentation

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Capacity Evaluation of a SIMO Satellite System at L, S and Ku Bands

Capacity Evaluation of a SIMO Satellite System at L, S and K...

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IEEE Vehicular Technology Conference

作者： Argyris Kyriazos Nektarios Moraitis Philip Constantinou Demosthenes Vouyioukas Institute of Communications and Computer Systems National Technical University of Athens Dept. of Information and Communication Systems Engineering University of the Aegean

ISBN: (纸本)9781424425167

This paper evaluates theoretically the capacity of single-input-multiple-output (SIMO) system utilizing uniform linear arrays at the receiver terminal for satellite applications. The theoretical study is performed at three different frequency bands. Overall, very sufficient capacities are achieved, varying between 3 and 8 b/s/Hz. Higher capacity values are achieved for low and medium elevation angles. In the heavy shadowing scenario the capacity drops significantly comparable with the light shadowing case. It reduces, in average, 1.4-1.7 b/s/Hz. Finally, the channel capacity is uncorrelated with element separation after a specific value of λ.

关键词： SIMO Satellite Capacity satellites reserve evaluation Superhigh frequency Satellite systems uniform linear arrays Shadowing (Histology) Channel capacity Frequency bands

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Crystal quality and conductivity type of epitaxial (002) ZnO films on (100) Si substrates for device applications

Crystal quality and conductivity type of epitaxial (002) ZnO...

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International Symposium Semiconductor Device Research (ISDRS)

作者： Saeed Esmaili Sardari Agis. A. Iliadis M. Stamataki D. Tsamakis N. Konofaos Electrical and Computer Engineering Dept. University of Maryland College Park USA Information and Communication Systems Engineering Dept. University of the Aegean Samos Samos Greece Electrical and Computer Eng. Dept. NTUA Athens Greece

Zinc oxide is a wide band-gap (3.37eV) semiconductor with high exciton binding energy (60meV) and excellent piezoelectric properties, showing promise for UV lasers, optical detection, sensors, and solar cells. Epitaxial growth of ZnO on Si is challenging due to lattice mismatch and thermal expansion coefficient differences, but it is important to develop such film growth in order to enhance the functionality of Si and provide optoelectronic and gas sensing capabilities in CMOS based ICs. Furthermore, ZnO grown by most techniques is nominally ntype and p-type films are hard to achieve; hampering the development of p-n junction devices.

关键词： Conductivity Zinc oxide Conductive films Semiconductor films Substrates Optical films Piezoelectric films Optical sensors Photonic band gap Excitons

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SPEECH CODING BASED ON SPARSE LINEAR PREDICTION

SPEECH CODING BASED ON SPARSE LINEAR PREDICTION

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European signal processing conference

作者： Daniele Giacobello Mads Grcesbell Christensen Manohar N. Murthi Soren Holdt Jensen Marc Moonen Dept. of Electronic Systems Aalborg Universitet Denmark Dept. of Electrical and Computer Engineering University of Miami USA Dept. of Electrical Engineering (ESAT-SCD) Katholieke Universiteit Leuven Belgium

ISBN: (纸本)9781617388767

This paper describes a novel speech coding concept created by introducing sparsity constraints in a linear prediction scheme both on the residual and on the prediction vector. The residual is efficiently encoded using well known multi-pulse excitation procedures due to its sparsity. A robust statistical method for the joint estimation of the short-term and long-term predictors is also provided by exploiting the sparse characteristics of the predictor. Thus, the main purpose of this work is showing that better statistical modeling in the context of speech analysis creates an output that offers better coding properties. The proposed estimation method leads to a convex optimization problem, which can be solved efficiently using interior-point methods. Its simplicity makes it an attractive alternative to common speech coders based on minimum variance linear prediction.

关键词： linear prediction Vocoders Speech analysis joint estimation Speech Convex function interior point method

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Workflow service extensions for UNICORE 6 -utilising a standard WS-BPEL engine for grid service orchestration

Workflow service extensions for UNICORE 6 -utilising a stand...

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Workshops on Parallel Processing, Euro-Par 2008: VHPC 2008, UNICORE 2008, HPPC 2008, SGS 2008, PROPER 2008, ROIA 2008, and DPA 2008

作者： Gudenkauf, S. Hasselbring, W. Höing, A. Scherp, G. Kao, O. OFFIS Institute for Information Technology R and D-Division Business Information Management Escherweg 2 26121 Oldenburg Germany Technische Universitat Berlin Faculty IV-Electrical Engineering and Computer Science Dept. of Telecommunication Systems Complex and Distributed IT Systems Einsteinufer 17 10587 Berlin Germany

ISBN: (纸本)3642009549

The BIS-Grid project1, a BMBF-funded project in the context of the German D-Grid initiative, focusses on realising Enterprise Application Integration using Grid technologies to proof that Grid technologies are feasible for information systems integration. Small and medium enterprises shall be enabled to integrate heterogeneous business information systems and to use external Grid resources and services with affordable effort. In this paper, we describe service extensions to UNICORE 6 to use an arbitrary WS-BPEL workflow engine and standard WS-BPEL to orchestrate stateful, WSRF-based Web Services, also called Grid Services. Thereby, we focus on how to combine the arbitrary workflow engine with UNICORE 6, and on how to access workflows and workflow instances. The workflows itself are also provided as Grid Services, realised by a Workflow Management Service that deploys Workflow Services within UNICORE 6, each wrapping a WS-BPEL workflow that is deployed in the arbitrary workflow engine. © Springer-Verlag Berlin Heidelberg 2009.

关键词： Web services

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A research for the optimization of MIPS instruction set simulation

A research for the optimization of MIPS instruction set simu...

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International Conference on computer Science & Education (ICCSE)

作者： Ming Liu Qixian Cai Dept. of Electronic Information and Control Engineering Guangxi University of Technology Liuzhou 545006 China Dept. of Computer Engineering Guangxi University of Technology Liuzhou 545006 China

The main idea of this article is through using Multi-level index and instruction abstract technology to improve the decode methods of the traditional MIPS instruction set simulation, The experiments show that this met... 详细信息

关键词： Decoding Computational modeling computer simulation Educational technology computer aided instruction Microprocessors computer science computer science education Optimization methods Printers

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