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6th Cambridge Workshops on Universal Access and Assistive Technology, CWUAAT 2012

作者： Bradley, M. Waller, S. Goodman-Deane, J. Hosking, I. Tenneti, R. Langdon, P.M. Clarkson, P.J. Department of Computer and Information Sciences Universal Usability Laboratory Towson University United States Department of Engineering Engineering Design Centre Cambridge University Cambridge United Kingdom Faculty of Medicine Dentistry and Health Sciences School of Primary Aboriginal and Rural Health Care University of Western Australia Crawley WA Australia

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3D simulation study of work-function variability in a 25 nm metal-gate FinFET with curved geometry using voronoi grains

3D simulation study of work-function variability in a 25 nm ...

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2012 International Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2012

作者： Indalecio, G. Garcia-Loureiro, A.J. Aldegunde, M. Kalna, K. Department of Electronics and Computer Science University of Santiago de Compostela Santiago de Compostela15782 Spain Electronics System Design Centre College of Engineering Swansea University SwanseaSA2 8PP United Kingdom

ISBN: (纸本)9780615717562

A full-scale 3D simulation study of the impact of metal gate granularity (MGG) on the off-state of a 25 nm length gate SOI FinFET is carried out. The 3D simulations are performed using a parallel finite-element simulator within the drift-diffusion approximation using density gradient quantum corrections. The shapes in the device are described by using splines, and metal grains are modelled using Voronoi diagrams. We study two different grain sizes and silicon fin corner geometries. While the impact of the geometry is found to be negligible in our simulations due to a relatively large size of the device, the grain size has a large impact on the variability of subthreshold characteristics. © 2012 IEEE.

关键词： Geometry

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OWQS: One-Way Quantum Computation Simulator

OWQS: One-Way Quantum Computation Simulator

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Euromicro Symposium on Digital System design

作者： Eesa Nikahd Mahmoobeh Houshmand Morteza Saheb Zamani Mehdi Sedighi Quantum Design Automation Laboratory Department of Computer Engineering and Information Technology Amirkabir University of Technology Tehran Iran

In one-way quantum computation (1WQC) model, universal quantum computations are performed using measurements to designated qubits in a highly entangled state. The choices of basis for these measurements as well as the structure of the entanglements specify a quantum algorithm. Although a number of methods have been proposed to simulate quantum circuit model on classical computers, no efficient tool has been developed to simulate the 1WQC model directly. In this paper, some techniques such as qubit elimination, implicit and in-place matrix-vector multiplication and pattern reordering are utilized to considerably reduce the time and memory needed for the simulations. These techniques were implemented in a tool called One-Way Quantum computation Simulator (OWQS). Experimental results validate the efficiency of the proposed approach.

关键词： Computational modeling Vectors Quantum computing Integrated circuit modeling Standards Quantum entanglement Logic gates

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Polynomial-metamodel assisted fast power optimization of Nano-CMOS PLL components

Polynomial-metamodel assisted fast power optimization of Nan...

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Forum on Specification, Verification and design Languages, FDL

作者： Saraju P. Mohanty Elias Kougianos Oleg Garitselov Javier Moreno Molina NanoSystems Design Laboratory Department of Computer Science and Engineering University of North Texas Denton TX USA NanoSystems Design Laboratory Department of Engineering Technology University of North Texas Denton TX USA Institute of Computer Technology University of Technology Vienna Vienna Austria

As the complexity of mixed-signal systems grows, the challenges of their design becomes exponentially more difficult. In order to mitigate this problem, this paper proposes a two stage approach that uses accurate metamodels and efficient algorithms for fast mixed-signal system optimization. The different components of a Phase-Locked Loop (PLL) are considered as case study. First, the metamodel creation process is presented. A simulated annealing based optimization algorithms then introduced for power optimization of the components. It is shown that the metamodel approach speeds up the optimization phase by 2000× with very good accuracy. The power consumption of the circuits is decreased by 22% for the baseline design and is within 8% of the circuit netlist-based, but computationally expensive approach.

关键词： Phase locked loops Integrated circuit modeling Polynomials Metamodeling Accuracy Simulated annealing

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Statistical discovery of site inter-dependencies in sub-molecular hierarchical protein structuring

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EURASIP JOURNAL ON BIOINFORMATICS AND SYSTEMS BIOLOGY 2012年第1期2012卷 1-18页

作者： Durston, Kirk K. Chiu, David K. Y. Wong, Andrew K. C. Li, Gary C. L. 1.School of Computer Science University of Guelph 50 Stone Road East Guelph ON N1G 2W1 Canada 2.Department of System Design Engineering University of Waterloo 200 University Ave. W Waterloo ON N2L 3G1 Canada

Background: Much progress has been made in understanding the 3D structure of proteins using methods such as NMR and X-ray crystallography. The resulting 3D structures are extremely informative, but do not always reveal which sites and residues within the structure are of special importance. Recently, there are indications that multiple-residue, sub-domain structural relationships within the larger 3D consensus structure of a protein can be inferred from the analysis of the multiple sequence alignment data of a protein family. These intra-dependent clusters of associated sites are used to indicate hierarchical inter-residue relationships within the 3D structure. To reveal the patterns of associations among individual amino acids or sub-domain components within the structure, we apply a k-modes attribute (aligned site) clustering algorithm to the ubiquitin and transthyretin families in order to discover associations among groups of sites within the multiple sequence alignment. We then observe what these associations imply within the 3D structure of these two protein families. Results: The k-modes site clustering algorithm we developed maximizes the intra-group interdependencies based on a normalized mutual information measure. The clusters formed correspond to sub-structural components or binding and interface locations. Applying this data-directed method to the ubiquitin and transthyretin protein family multiple sequence alignments as a test bed, we located numerous interesting associations of interdependent sites. These clusters were then arranged into cluster tree diagrams which revealed four structural sub-domains within the single domain structure of ubiquitin and a single large sub-domain within transthyretin associated with the interface among transthyretin monomers. In addition, several clusters of mutually interdependent sites were discovered for each protein family, each of which appear to play an important role in the molecular structure and/or function. Co

关键词： k-modes algorithm Site cluster Associations Ubiquitin Transthyretin Pattern discovery Cluster tree Attribute clustering Protein structural sub-domains

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Link correlation aware opportunistic routing

Link correlation aware opportunistic routing

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： Anas Basalamah Song Min Kim Shuo Guo Tian He Yoshito Tobe Department of Computer Science and Engineering University of Minnesota USA Department of Information Systems and Media Design Tokyo Denki University Japan

ISBN: (纸本)9781467307734;9781467307758

By exploiting reception diversity of wireless network links, researchers have shown that opportunistic routing can improve network performance significantly over traditional routing schemes. However, recently empirical studies indicate that we are too optimistic, i.e. diversity gain can be overestimated if we continue to assume that packet receptions of wireless links are independent events. For the first time, this paper formally analyzes the opportunistic routing gain under the presence of link correlation considering the loss of DATA and ACK packets. Based on the model, we introduce a new link-correlation-aware opportunistic routing scheme, which improves the performance by exploiting the diverse uncorrelated forwarding links. Our design is evaluated using simulation where we show (i) link correlation leads to less diversity gain, (ii) and with our link-correlation-aware design; improvement can be gained. We also provide a unique model to generate strings of randomly correlated receptions.

关键词： Correlation Routing Wireless networks Measurement Wireless sensor networks Protocols

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Obstacle detection for low flying UAS using monocular camera

Obstacle detection for low flying UAS using monocular camera

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IEEE Instrumentation and Measurement Technology Conference

作者： F. Zhang R. Goubran P. Straznicky Department of Systems and Computer Engineering Carleton University Canada Faculty of Engineering and Design Carleton University Canada Department of Mechanical and AeroSpace Engineering Carleton University Canada

This paper describes an obstacle detection algorithm for low flying unmanned aircraft system (UAS) using an inertial aided inverse depth Extended Kalman Filter (EKF) framework. The EKF framework fuses inertial measurements with monocular image sensor measurements to estimate the positions of a number of landmarks as well as the position and orientation of the UAS. A high resolution sparse terrain elevation map and UAS trajectory can then be computed from the filter state vector. An inverse depth parameterization is used to describe the position of the landmarks so that features at all ranges can be tracked by the filter. A test flight was conducted to test the algorithm in a realistic scenario. The result shows that the algorithm produces accurate terrain elevation model, and is capable of generating accurate high resolution terrain elevation map when image sensor with high resolution and dynamic range is used.

关键词： Cameras Geophysical measurements Image resolution Vectors Heuristic algorithms Feature extraction Global Positioning System

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The application of improved predictive control in coordinated control system

The application of improved predictive control in coordinate...

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2012 7th IEEE Conference on Industrial Electronics and Applications, ICIEA 2012

作者： Guo, Xianjun J., Liu G., Hou Z., Wang Electrical and Instrument Control Department Henan Electric Power Survey and Design Institute Henan China Control and Computer Engineering Department North China Electric Power University NCEPU Beijing China Planning and Marketing Department Guodian Xingyang Power and Coal Co. Ltd. Henan China

ISBN: (纸本)9781457721175

As we all know coordinated control system (CCS) has large delay, strong coupling and its precise mathematical model is hard to obtain. So the regular control strategy is often difficult to get satisfactory control quality. Generalized predictive control (GPC) is a kind of advanced control strategy, it uses objective optimization, rolling horizon and feedback compensation, for these reasons the control effect is good when this algorithm is applied in CCS. However the GPC algorithm has large calculated burden and its structure is complex. Reference [6] put forward an improved generalized predictive control algorithm which avoids calculating inverse matrixes and complex Diophantine equation. Moreover this improved algorithm also has strong limit to the control action. In this paper this improved GPC algorithm is applied in 300MW one through boiler unit and the control effect is compared with GPC. The result shows that this algorithm reduces the on-line calculated burden greatly and saves much optimization time. Besides when the set point is changed the output signals and input signals don't vary largely. The overshoot is restrained so that it helps extend the life of the equipment. © 2012 IEEE.

关键词： Inverse problems

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A distributed reliable and energy-efficient topology control algorithm in wireless sensor network

2012 International Conference on Information Science and App...

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2012 International Conference on Information Science and Applications, ICISA 2012 2012年

作者： Shiu, Liang-Cheng Lin, Fu-Tian Lee, Chao-Yang Yang, Chu-Sing Department of Computer Science and Information Engineering Nationl Pigtung Institute of Commerce Pigtung Taiwan Institute of Computer and Communication Engineering National Cheng Kung University Tainan Taiwan Department of Electrical Engineering Tung Fang Design University Kaoshiung Taiwan

ISBN: (纸本)9781467321860

Topology control is an efficiency method that can enhance the energy efficiency in a wireless sensor network. There are several research discuss the topology control problem only focus on topology construction or topology maintenance. In this paper, we design a distributed reliable and energy- efficient topology control algorithm both take into consider with topology construction and maintenance. In the topology construction phase, we build a reliable topology to reduce the packet retransmission. We use intermittently links and natural of wireless network. Anyone can receive the packet, when it in someone's coverage. Therefore, we combined these features to build a high network reachable probability. It can enhance the network efficiency. In addition to, we propose the dynamic topology maintenance method, which can balance the energy consumption by multi-level energy threshold. Our proposed method can obtain the high network reachable probability and to extend the network lifetime. Experiments indicate the superiority of the proposed algorithm in terms of average energy consumption and network lifetime. © 2012 IEEE.

关键词： Energy utilization

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A model for predicting and monitoring industrial system availability

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International Journal of Product Development 2012年第2期16卷 140-157页

作者： Löfstrand, Magnus Backe, Björn Kyösti, Petter Lindström, John Reed, Sean Division of Computer Aided Design Luleå University of Technology SE-971 87 Luleå Sweden Nottingham Transportation Engineering Centre NTEC University of Nottingham University Park Nottingham NG7 2RD United Kingdom

This paper describes the integration of a sensor data stream monitoring system into a proposed functional product model capable of predicting functional availability. Such monitoring systems enable predictive maintenance to be carried out -pre-emptive maintenance that is scheduled in response to imminent hardware failure -and are in widespread use in industry. The industrial motivation for this research is that agreed upon system availability is a critical element of any business-to-business agreement regarding functional sales. Such a model is important when making strategic choices regarding FPs and can be used to develop a high availability product design through simulation-driven development, as well as to provide operational decision support that reflects the current reality to enable optimal availability to be achieved in practice. The proposed model integrates hardware, support system and monitoring system models, and is able to incorporate actual operational data. It has been partly verified based on previous research. Copyright © 2012 Inderscience Enterprises Ltd.

关键词： Availability

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