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Leakage proof and noise tolerant domino circuit based on SEFG

Leakage proof and noise tolerant domino circuit based on SEF...

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2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology

作者： Wang, Jinhui Gong, Na Hou, Ligang Peng, Xiaohong Wu, Wuchen VLSI and System Lab. Beijing University of Technology Beijing 100124 China Department of Computer Science and Engineering State University of New York at Buffalo Buffalo NY 14260 United States

ISBN: (纸本)9781424457984

Utilizing the sleep switch transistor technique and dual threshold voltage technique, a source following evaluation gate (SEFG) based domino circuit is presented in this paper for simultaneously suppressing the leakage current and enhancing noise immunity. Simulation results show that the leakage current of the proposed design can be reduced by 43%, 62%, and 67% while improving 19.7%, 3.4 %, and 12.5% noise margin as compared to standard low threshold voltage circuit, standard dual threshold voltage circuit, and SEFG structure, respectively. Also, the inputs and clock signals combination static state dependent leakage current characteristic is analyzed and the minimum leakage states of different domino AND gates are obtained. ©2010 IEEE.

关键词： Threshold voltage

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A Rule Based Model for Efficient Representation and Accurate Recognition of Human Faces

A Rule Based Model for Efficient Representation and Accurate...

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International Conference on Advances in computer engineering (ACE)

作者： B.H. Shekar G. Thippeswamy P. Shivakumara Department of Computer Science Mangalore University Mangalore India Department of Computer Science& Engineering Sir M Visvesvaraya Institute of Technology Bangalore India School of Computing National University of Singapore Singapore

ISBN: (纸本)9781424471546;9780769540580

In this paper, we investigate whether the rule based system derived from edges are effective and efficient for face representation and recognition when the number of classes is fixed and known. The characteristics of edges namely straightness and crookedness are used to derive rules. During training, a representative feature value is calculated for each class based on the average percentage of edges that satisfy the rule. In recognition, the representative feature value of an unknown face image is compared against the class representative feature value to assign a label to it. The proposed system does not require extensive feature extraction and classification techniques. Our experimental analysis on the standard CALTECH face databases shows that the edge based system is suitable for real time environment.

关键词： Face recognition Humans Image edge detection Principal component analysis Linear discriminant analysis Optical computing Image recognition computer science Spatial databases Feature extraction

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Teaching software engineering from a collaborative perspective: Some Latin-American experiences

Teaching software engineering from a collaborative perspecti...

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21st International Workshop on Database and Expert systems Applications, DEXA 2010

作者： Giraldo, Fáber D. Collazos, César A. Ochoa, Sergio F. Zapata, Sergio De Clunie, Gisela Torres System and Computer Engineering Department University of Quindío Armenia IDIS Research Group University of Cauca Popayan Colombia Computer Science Department University of Chile Santiago Chile Informatics Institute National University of San Juan San Juan Argentina Software Engineering Department Technological University of Panama Panama City Panama

ISBN: (纸本)9780769541747

Teaching software engineering has been recognized as an important challenge for computer science undergraduate programs. Instruction in such area requires not only to deliver theoretical knowledge, but also to perform practical experiences that allow students to assimilate and apply such knowledge. This paper presents some results of two computer-Supported Collaborative Learning (CSCL) experiences that involved students of software engineering courses from four Latin American Universities. The obtained results were satisfactory and indicate the reported collaborative activity could be appropriate to address teaching software engineering. © 2010 IEEE.

关键词： E-learning

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Virtual production control system

Virtual production control system

引用

2010 IEEE International Conference on Automation science and engineering, CASE 2010

作者： Yang, Haw-Ching Chen, Ying-Liang Hung, Min-Hsiung Cheng, Fan-Tien Institute of System Information and Control National Kaohsiung First University of Science and Technology Kaohsiung Taiwan Institute of Manufacturing Engineering National Cheng Kung University Tainan Taiwan Department of Computer Science Chinese Culture University Taipei Taiwan

ISBN: (纸本)9781424454471

This work develops a novel virtual production control system (VPCS), which is allocated on a manufacturer side to adjust production pace of a supplier using a short-term demand plan for reducing inventory level. In addition to remotely monitoring production progress of a supplier, the proposed VPCS allows manufacturers to pre-schedule the latest outputs using an integer programming model, to simulate the short-term plan by a stochastic colored timed Petri Nets, and to adjust the production pace of the supplier via the plan. An industrial case study shows that the supplier inventory was reduced by 13.8% over that of the real inventory level with an order-fill rate exceeding 99.6% using the proposed VPCS. © 2010 IEEE.

关键词： Stochastic models

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High frequency mechanical vibrations stimulate the bone matrix formation in hBMSCs (human Bone Marrow Stromal Cells)

High frequency mechanical vibrations stimulate the bone matr...

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12th Mediterranean Conference on Medical and Biological engineering and Computing, MEDICON 2010

作者： Prè, D. Ceccarelli, G. De Angelis, M. G. Cusella Magenes, G. Department of Computer and System Science University of Pavia Via Ferrata 1 27100 Pavia Italy Department of Experimental Medicine University of Pavia Pavia Italy Tissue Engineering Centre C.I.T. Pavia Italy

ISBN: (纸本)9783642130380

The aim of this work is to test the effects of a specific mechanical stimulation (Low Amplitude, high Frequency Vibrations) on the bone matrix formation of hBMSCs. Previous studies demonstrated that chemical culture conditions could influence the differentiation of hBMSCs toward bone: by plating the cells in appropriate osteogenic culture medium hBMSCs differentiate into osteoblasts [1-3]. In our experiment the cells were treated for 21 and 40 days by vibrating the wells for 45 minutes a day at a working frequency of 30 Hz. In order to separate the effects of the induction toward bone caused by the osteogenic culture medium and the effects of the high frequency vibrations, we divided the cells in four samples: in normal medium with or without mechanical treatment and in osteogenic medium with or without mechanical treatment. Afterwards, in order to measure the level of calcium deposition and consequently, the formation of bone matrix, the Alizarin Red assay was performed. The results express a strong increase in the deposition calcium for the extracellular matrix for the vibrated samples with respect to the non-mechanically treated ones for the 40 days treatment. © 2010 International Federation for Medical and Biological engineering.

关键词： Bone

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Using finite state machines for evaluating spoken dialog systems

Using finite state machines for evaluating spoken dialog sys...

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2010 IEEE Workshop on Spoken Language Technology, SLT 2010

作者： Zhu, Yi Yang, Zhaojun Meng, Helen Li, Baichuan Levow, Gina King, Irwin Department of Computer Science and Engineering Chinese University of Hong Kong Shatin N.T. Hong Kong Department of System Engineering and Engineering Management Chinese University of Hong Kong Shatin N.T. Hong Kong Department of Linguistics University of Washington Seattle WA 98195 United States

ISBN: (纸本)9781424479030

Development of spoken dialog systems (SDSs) can be facilitated by better evaluation methods. Previous methods seldom consider the efficiency of the system, which is important to users. We study the problem of evaluating SDSs and propose a new framework by generalizing states from utterances of dialogs to build finite state machine (FSM). These states can be regarded as efficiency measurement of SDSs. The FSM framework models dialogs as paths in an FSM to combine efficiency measurement with regression models. The proposed FSM framework can be applied in conjunction with regression models to improve evaluation accuracy. We compare our FSM framework combined with three regression models in several experiments. We obtain promising results on a collection of dialogs from the "Let's Go!" system, with our approach outperforming regression models. ©2010 IEEE.

关键词： Efficiency

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Collection of user judgments on spoken dialog system with crowdsourcing

Collection of user judgments on spoken dialog system with cr...

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2010 IEEE Workshop on Spoken Language Technology, SLT 2010

作者： Yang, Zhaojun Li, Baichuan Zhu, Yi King, Irwin Levow, Gina Meng, Helen Department of System Engineering and Engineering Management Chinese University of Hong Kong Shatin.N.T Hong Kong Department of Computer Science and Engineering Chinese University of Hong Kong Shatin.N.T Hong Kong Department of Linguistics University of Washington Seattle WA 98195 United States

ISBN: (纸本)9781424479030

This paper presents an initial attempt at the use of crowdsourcing for collection of user judgments on spoken dialog systems (SDSs). This is implemented on Amazon Mechanical Turk (MTurk), where a Requester can design a human intelligence task (HIT) to be performed by a large number of Workers efficiently and cost-effectively. We describe a design methodology for two types of HITs - the first targets at fast rating of a large number of dialogs regarding some dimensions of the SDS's performance and the second aims to assess the reliability of Workers on MTurk through the variability in ratings across different Workers. A set of approval rules are also designed to control the quality of ratings from MTurk. At the end of the collection work, user judgments for about 8,000 dialogs rated by around 700Workers are collected in 45 days. We observe reasonable consistency between the manual MTurk ratings and an automatic categorization of dialogs in terms of task completion, which partially verifies the reliability of the approved ratings from MTurk. From the second type of HITs, we also observe moderate inter-rater agreement for ratings in task completion which provides support for the utilization of MTurk as a judgments collection platform. Further research on the exploration of SDS evaluation models could be developed based on the collected corpus. ©2010 IEEE.

关键词： Crowdsourcing

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Predicting user evaluations of spoken dialog systems using semi-supervised learning

Predicting user evaluations of spoken dialog systems using s...

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2010 IEEE Workshop on Spoken Language Technology, SLT 2010

作者： Li, Baichuan Yang, Zhaojun Zhu, Yi Meng, Helen Levow, Gina King, Irwin Department of Computer Science and Engineering Chinese University of Hong Kong Shatin N.T. Hong Kong Department of System Engineering and Engineering Management Chinese University of Hong Kong Shatin N.T. Hong Kong Department of Linguistics University of Washington Seattle WA 98195 United States

ISBN: (纸本)9781424479030

User evaluations of dialogs from a spoken dialog system (SDS) can be directly used to gauge the system's performance. However, it is costly to obtain manual evaluations of a large corpus of dialogs. Semi-supervised learning (SSL) provides a possible solution. This process learns from a small amount of manually labeled data, together with a large amount of unlabeled data, and can later be used to perform automatic labeling. We conduct comparative experiments among SSL approaches, classical regression and supervised learning in evaluation of dialogs from CMU's Let's Go Bus Information system. Two typical SSL methods, namely co-training and semi-supervised support vector machine (S3VM), are found to outperform the other approaches in automatically predicting user evaluations of unseen dialogs in the case of low training rate. ©2010 IEEE.

关键词： Supervised learning

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A sensor network configuration considering priori estimation error and communication energy

A sensor network configuration considering priori estimation...

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12th IFAC Symposium on Large Scale systems: Theory and Applications, LSS 2010

作者： Takeda, Takashi Namerikawa, Toru Division of Electrical Engineering and Computer Science Graduate School of Natural Science and Technology Kanazawa University Kakuma-machi Kanazawa 920-1192 Japan Department of System Design Engineering Ke University 3-14-1 Hiyoshi Kohoku-ku Yokohama 223-8522 Japan

ISBN: (纸本)9783902661913

This paper deals with a network configuration considering priori estimation error variance and communication energy in sensor networked feedback system. Each sensor transmits information to a fusion center via multi-hop communication network. We propose a novel network configuration algorithm that each sensor node transmits information with a same dimension. The transmitted information is merged in each sensor node and consists of measurement data with time delay. Then the priori estimate can be minimum variance estimation. The proposed algorithm achieves sub-optimal network topology with minimum energy and a desired variance. Experimental results show an effectiveness of the proposed method.

关键词： Sensor nodes

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Performance enhancement in wireless sensor network clustering

Performance enhancement in wireless sensor network clusterin...

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2010 International computer Symposium, ICS 2010

作者： Li, I.-Hui Liao, I.-En Wu, Feng-Nien Department of Computer Science and Engineering National Chung Hsing University Taichung Taiwan Department of Information Networking and System Administration Ling Tung University Taichung Taiwan Foxconn Technology Group Tucheng City Taipei County Taiwan

ISBN: (纸本)9781424476404

In Wireless Sensor Networks with a clustered-hierarchical structure, Cluster-Head (CH) nodes function as gateways between the sensors and the Base Station (BS). The energy dissipation of the sensors can be reduced by optimizing the load balance within the clustering hierarchy. This paper proposes a three-layer clustering scheme in which the system lifetime is extended by adding an additional layer of Super-Cluster Head (SCH) nodes between the CHs and the BS, in order to ease the transmission load of the CHs and to balance the load distribution. The SCH layer is configured using a facility location algorithm. The simulation results confirm that the facility location algorithm yields a better load balance in the SCH layer than that obtained using either a random configuration or a round-robin scheme. Finally, it is shown that irrespective of the size of the sensor field, the proposed three-layer clustering hierarchy scheme outperforms the conventional LEACH-C two-layer scheme in terms of the average energy dissipation of the nodes and the average survival times of the nodes. ©2010 IEEE.

关键词： Energy dissipation

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