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On/Off-Line Prediction Applied to Job Scheduling on Non-Dedicated NOWs

Journal of computer science & Technology 2011年第1期26卷 99-116页

作者： Mauricio Hanzich Porfidio Hernandez Francesc Gine Francesc Solsona Josep L.Lerida Department of Computer Application in Science and Engineering Barcelona Supercomputing CenterBarcelonaSpain Department of Computer Architecture & Operating Systems Autonomous University of BarcelonaBarcelonaSpain Department of Computer Science University of LleidaLleidaSpain

This paper proposes a prediction engine designed for non-dedicated clusters, which is able to estimate the turnaround time for parallel applications, even in the presence of serial workload of the workstation owner. The prediction engine can be configured to work with three different estimation kernels： a Historical kernel, a Simulation kernel based on analytical models and an integration of both, named Hybrid kernel. These estimation proposals were integrated into a scheduling system, named CISNE, which can be executed in an on-line or off-line mode. The accuracy of the proposed estimation methods was evaluated in relation to different job scheduling policies in a real and a simulated cluster environment. In both environments, we observed that the Hybrid system gives the best results because it combines the ability of a simulation engine to capture the dynamism of a non-dedicated environment together with the accuracy of the historical methods to estimate the application runtime considering the state of the resources.

关键词： prediction method non-dedicated cluster cluster computing job scheduling simulation

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Hierarchical modelling for unsupervised tumour segmentation in PET

Hierarchical modelling for unsupervised tumour segmentation ...

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IEEE EMBS International Conference on Information Technology Applications in Biomedicine (ITAB)

作者： Ziming Zeng Tony Shepherd Reyer Zwiggelaar Department of Computer Science Aberystwyth University UK Faculty of Information and Control Engineering Shenyang jianzhu University Shenyang China Turku PET Center and Department of Oncology and Radiotherapy Turku University Hospital Finland

This paper presents a fully automated and unsupervised method for the segmentation of tumours in PET images. The segmentation technique incorporates a pre-processing stage and a hierarchical approach based on an improved region-scalable energy fitting model. The advantages of the approach lie in its multi-level processing. It first considers the whole range of grey levels in the image volume, which is able to avoid local maxima. Subsequently, the local grey levels range is utilized to refine the segmentation which effectively avoids false negative segmentations. We validate our method using real PET images of head-and-neck cancer patients as well as custom-designed phantom PET images. Compared with other popular approaches, the experimental results on both data sets show that our method can accurately segment tumours in PET images.

关键词： Image segmentation Positron emission tomography Accuracy Biomedical imaging

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Cardiovascular Segmentation Based on Hough Transform and Heuristic Knowledge

Cardiovascular Segmentation Based on Hough Transform and Heu...

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Iranian Conference of Biomedical engineering

作者： Zahra Turani Reza A. Zoroofi Shapoor Shirani Sara. Abkhofte Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran 14395/515 IRAN Department of Radiology School of Medicine Tehran University of Medical Science Tehran IRAN.

ISBN: (纸本)9781467331289

Nowadays cardiovascular diseases are one of the most major causes of mortality. Computed Tomography Angiography (CTA) is a very useful imaging tool for cardiovascular disease diagnosis. So it is important to analyze CTA images well. This paper proposed a new method for fully automatic cardiovascular segmentation based on combination of Hough transform and region growing algorithm. It is a robust method which segments ascending aorta, descending aorta, and left ventricle concurrently. Comparing to the manual method which is done by cardiologist and previous automatic and semi-automatic works, our method is faster, more accurate, and fully automatic. This procedure also can be applied to coronary segmentation. The validation of the acquired cardiovascular images is evaluated by a cardiologist. By evaluating 10 datasets, which contain about 5000 images, the accuracy of the method is 97.3% comparing to the gold standard. Our gold standard is the images segmented by cardiologist. In addition, average elapsed time is 0.18s per image.

关键词： Automatic cardiovascular segmentation Computed Tomography Angiography Hough transform Cardiovascular disease Region growing

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International Conference on Soft Computing and Intelligent Systems

作者： Takaharu Shimada Tatsuya Hazemoto Shunsuke Makino Kouichi Hirata Kimihito Ito Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology Department of Artificial Intelligence Kyushu Institute of Technology Department of Artificial Intelligence & Biomedical Informatics R&D Center Kyushu Institute of Technology Research Center for Zoonosis Control Hokkaido University

ISBN: (纸本)9781467327428

In order to capture a selective packaging mechanism among eight RNA segments in influenza A viruses, we assume that almost nucleotides in the positions of packaging signals must be simultaneously changed. In this paper, we formulate such positions as correlated mutations based on a joint entropy ratio, develop a method of finding all of them by using set enumeration with pruning and apply to nucleotide sequences among RNA segments in H3N2 influenza viruses.

关键词： Packaging signal Influenza viruses Correlated mutation

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REGION-BASED ACTIVE SURFACE MODELLING AND ALPHA MATTING FOR UNSUPERVISED TUMOUR SEGMENTATION IN PET

REGION-BASED ACTIVE SURFACE MODELLING AND ALPHA MATTING FOR ...

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IEEE International Conference on Image Processing

作者： Ziming Zeng Jue Wang Tony Shepherd Reyer Zwiggelaar Computer Science Department Aberystwyth University UK Information and Control Engineering Faculty Shenyang Jianzhu University Liaoning China Adobe Systems Seattle USA Turku PET Center and Department of Oncology and Radiotherapy Turku University Hospital Finland

This paper presents a combination of existing advanced methods to solve the partial volume segmentation problem. It uses region-based active surface modelling in a hierarchical scheme to eliminate segmentation errors, followed by an alpha matting step to further refine the segmentation. This method can have an interest in several applications in medical imaging. We have validated our method on real PET images of head-and-neck cancer patients as well as custom designed phantom PET images. Experiments show that our method can generate more accurate segmentation than existing approaches.

关键词： Image segmentation Positron emission tomography Tumors Imaging phantoms Solid modeling Cancer

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An Implementation of Distributed Order PI controller And Its Applications To The Wheeled Service Robot

An Implementation of Distributed Order PI Controller And Its...

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第五届国际自动控制联合会分数阶导数及其应用会议

作者： Fengyu Zhou Yang Zhao Yan Li YangQuan Chen School of Control Science and Engineering Shandong UniversityJinan 250061 Shandong P.R. China Center for Self-Organizing and Intelligent Systems (CSOIS) Electrical and Computer Engineering Department Utah State University Logan UT 84322 USA

In this paper,a robust distributed order PI controller design method is derived,which tolerates certain system *** theory and implementation of the distributed order operators are discussed in both time and frequency

关键词： controller An Implementation of Distributed Order PI controller And Its Applications To The Wheeled Service Robot Service

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Improving the quality factor of an RF spiral inductor with non-uniform metal width and non-uniform coil spacing

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Journal of Semiconductors 2011年第6期32卷 64-68页

作者：沈珮张万荣黄璐金冬月谢红云 School of Electronic Information and Control Engineering Beijing University of Technology Alabama Microelectronics Science and Technology Center Electronic and Computer Engineering DepartmentAuburn University

An improved inductor layout with non-uniform metal width and non-uniform spacing is proposed to increase the quality factor（Q factor）.For this inductor layout,from outer coil to inner coil,the metal width is reduced by an arithmetic-progression step,while the metal spacing is increased by a geometric-progression step. An improved layout with variable width and changed spacing is of benefit to the Q factor of RF spiral inductor improvement（approximately 42.86%）,mainly due to the suppression of eddy-current loss by weakening the current crowding effect in the center of the spiral *** order to increase the Q factor further,for the novel inductor, a patterned ground shield is used with optimized layout *** results indicate that,in the range of 0.5 to 16 GHz,the Q factor of the novel inductor is at an optimum,which improves by 67%more than conventional inductors with uniform geometry dimensions（equal width and equal spacing）,is enhanced by nearly 23%more than a PGS inductor with uniform geometry dimensions,and improves by almost 20%more than an inductor with an improved layout.

关键词： inductor layout optimization variable metal width and spacing integrated RF inductor silicon substrate

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Towards an ontology for autonomous robots

Towards an ontology for autonomous robots

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25th IEEE/RSJ International Conference on Robotics and Intelligent Systems, IROS 2012

作者： Paull, Liam Severac, Gaetan Raffo, Guilherme V. Angel, Julian Mauricio Boley, Harold Durst, Phillip J. Gray, Wendell Habib, Maki Nguyen, Bao Ragavan, S. Veera Saeedi G., Sajad Sanz, Ricardo Seto, Mae Stefanovski, Aleksandar Trentini, Michael Li, Howard COBRA Department of Electrical and Computer Engineering University of New Brunswick Fredericton NB E3B 5A3 Canada ONERA-University of Toulouse France Department of Automation and Systems Federal University of Santa Catarina Brazil Department of Computer Engineering Pontificia Universidad Javeriana Bogot Colombia National Research Council Canada US Army ERDC 3909 Halls Ferry Road Vicksburg MS 39180 United States Mechanical Engineering Department School of Sciences and Engineering American University in Cairo New Cairo Egypt Defence Research and Development Canada-CORA Ottawa ON Canada Monash University Sunway Campus Australia Systems Engineering and Automatic Control Autonomous Systems Laboratory Research Group Universidad Politcnica de Madrid Madrid Spain Defence Research and Development Canada-Atlantic Dartmouth NS Canada Department of Computer Science George Washington University United States Defence R and D Canada-Suffield PO Box 4000 Station Main Medicine Hat AB T1A 8K6 Canada

ISBN: (纸本)9781467317375

The IEEE RAS Ontologies for Robotics and Automation Working Group is dedicated to developing a methodology for knowledge representation and reasoning in robotics and automation. As part of this working group, the autonomous Robots sub-group is tasked with developing ontology modules for autonomous robots. This paper describes the work in progress on the development of ontologies for autonomous systems. For autonomous systems, the focus is on the cooperation, coordination, and communication of multiple unmanned aerial vehicles (UAVs), unmanned ground vehicles (UGVs), and autonomous underwater vehicles (AUVs). The ontologies serve as a framework for working out concepts of employment with multiple vehicles for a variety of operational scenarios with emphasis on collaborative and cooperative missions. © 2012 IEEE.

关键词： Ontology

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Continuous-variable quantum key distribution using thermal states

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Physical Review A 2012年第2期86卷 022318-022318页

作者： Christian Weedbrook Stefano Pirandola Timothy C. Ralph Center for Quantum Information and Quantum Control Department of Electrical and Computer Engineering and Department of Physics University of Toronto Toronto M5S 3G4 Canada Department of Computer Science University of York Deramore Lane York YO10 5GH United Kingdom Centre for Quantum Computation and Communication School of Mathematics and Physics University of Queensland St Lucia Queensland 4072 Australia

We consider the security of continuous-variable quantum key distribution using thermal (or noisy) Gaussian resource states. Specifically, we analyze this against collective Gaussian attacks using direct and reverse reconciliation where both protocols use either homodyne or heterodyne detection. We show that in the case of direct reconciliation with heterodyne detection, an improved robustness to channel noise is achieved when large amounts of preparation noise is added, as compared to the case when no preparation noise is added. We also consider the theoretical limit of infinite preparation noise and show a secure key can still be achieved in this limit provided the channel noise is less than the preparation noise. Finally, we consider the security of quantum key distribution at various electromagnetic wavelengths and derive an upper bound related to an entanglement-breaking eavesdropping attack and discuss the feasibility of microwave quantum key distribution.

关键词： Heterodyne detection

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Distributed Identification of the Cell Transmission Traffic Model: A Case Study

Distributed Identification of the Cell Transmission Traffic ...

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American control Conference

作者： Marco Rinaldi Luca Capisani Antonella Ferrara Alfredo Nunez Mohammad Hajiahmadi Bart De Schutter Department of Computer Engineering and Systems Science Universita degli Studi di Pavia via Ferrata 1 27100 Pavia Italy Delft Center for Systems and Control Delft University of Technology Mekelweg 2 2628 CD Delft The Netherlands

ISBN: (纸本)9781457710957

The problem of the distributed identification of a macroscopic first-order traffic model, viz. the Cell Transmission Model (CTM), is considered in the paper. The parameters to be identified characterize the dynamics of the density in different sections of the freeway (cells). We explore different distributed identification schemes. The purposes of the approach are mainly to obtain good prediction models through the minimization of the one-step ahead prediction error of the densities of the cells, and to reduce the computational time and the effort required to perform the identification. The methodology is validated relying on real-life data measured on a portion of the A12 freeway in The Netherlands. An evaluation of the performance of the identified model used as a set of virtual sensors in different scenarios is presented.

关键词： Optimization Sensors Traffic control Computational modeling Mathematical model Predictive models Road transportation

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