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Network Reconstruction Based on Evolutionary-Game data via Compressive Sensing

Physical Review X 2011年第2期1卷 021021-021021页

作者： Wen-Xu Wang Ying-Cheng Lai Celso Grebogi Jieping Ye Department of Systems Science School of Management and Center for Complexity Research Beijing Normal University Beijing 100875 China School of Electrical Computer and Energy Engineering Arizona State University Tempe Arizona 85287 USA Institute for Complex Systems and Mathematical Biology King’s College University of Aberdeen Aberdeen AB24 3UE UK School of Computing Informatics and Decision Systems Engineering Arizona State University Tempe Arizona 85287 USA

Evolutionary games model a common type of interactions in a variety of complex, networked, natural systems and social systems. Given such a system, uncovering the interacting structure of the underlying network is key to understanding its collective dynamics. Based on compressive sensing, we develop an efficient approach to reconstructing complex networks under game-based interactions from small amounts of data. The method is validated by using a variety of model networks and by conducting an actual experiment to reconstruct a social network. While most existing methods in this area assume oscillator networks that generate continuous-time data, our work successfully demonstrates that the extremely challenging problem of reverse engineering of complex networks can also be addressed even when the underlying dynamical processes are governed by realistic, evolutionary-game type of interactions in discrete time.

关键词： Complex Systems Nonlinear Dynamics Statistical Physics

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Denoising of two-dimensional geometric discontinuities

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International Journal of computers and Applications 2010年第2期32卷 129-140页

作者： Shen, J. Yoon, D. Zhao, D. Song, Y. Department of Computer and Information Science University of Michigan Dearborn MI United States Department of Electrical and Computing Engineering University of Michigan Dearborn MI United States Institute of Computing Technology Chinese Academy of Science Beijing China

Accurate reduction of two-dimensional curve noises at sharp edges, corners, or C0 discontinuous end points is crucial to the fast and accurate metrology, because more severe measurement errors of various sensors are frequently observed near sharp edges and corners of the objects to be measured. In this paper we explore three schemes (interior-point, polynomial extrapolation- and reflectionpoint methods) for handling C0 discontinuity. We also propose a new interior-point method for dealing with the accurate denoising of C1 discontinuity. Numerical experiments have been conducted for demonstrating the efficacy of our new approach in terms of denoising accuracy.

关键词： Noise abatement

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A Multitier System for the Verification, Visualization and Management of CHIMERA

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Procedia computer science 2011年 4卷 2076-2085页

作者： E.J. Lingerfelt O.E.B. Messer J.A. Osborne R.D. Budiardja A. Mezzacappa Computer Science and Mathematics Division Oak Ridge National Laboratory Oak Ridge TN 37831-6354 Leadership Computing Facility Oak Ridge National Laboratory Oak Ridge TN 37831-6354 Department of Physics and Astronomy University of Tennessee Knoxville TN 37996-1200 Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN 37996-2100 NSF Teragrid XD RDAVCenter National Institute for Computational Sciences University of Tennessee Knoxville TN 37996-2100 Physics Division Oak Ridge National Laboratory Oak Ridge TN 37831-6354

CHIMERA is a multi-dimensional radiation hydrodynamics code designed to study core-collapse supernovae. The code is made up of three essentially independent parts: a hydrodynamics module, a nuclear burning module, and a neutrino transport solver combined within an operator-split approach. Given CHIMERA's complexity and pace of ongoing development, a new support system, Bellerophon, has been designed and implemented to perform automated verification, visualization and management tasks while integrating with other workflow systems utilized by CHIMERA's development group. In order to achieve these goals, a multitier approach has been adopted. By integrating supercomputing platforms, visualization clusters, a dedicated web server and a client-side desktop application, this system attempts to provide an encapsulated, end-to-end solution to these needs.

关键词： Supernovae Visualization Regression test Code verification Multitier system

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Spatial temporal simulation of active optoelectronic and plasmonic devices using a multi-level multi-electron FDTD model

Spatial temporal simulation of active optoelectronic and pla...

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2010 OSA-IEEE-COS Advances in Optoelectronics and Micro/Nano-Optics, AOM 2010

作者： Ho, Seng-Tiong Ravi, Koustuban Huang, Yingyan Wang, Qian Bhola, Bipin Chen, Xi Li, Xiangyu Data Storage Institute Singapore Singapore Electrical Engineering and Computer Science Department Northwestern University Evanston United States

ISBN: (纸本)9781424483938

We introduce a recently developed general computational model for the electromagnetic simulations of complex atomic, molecular, or semiconductor media using the finite difference time domain (FDTD) method based on a multilevel multi-electron (MLME) system. We show how this MLMEFDTD model can be used for spatial-temporal simulation of a wide range of active optoelectronic and plasmonic devices. Realistic simulations ranging from semiconductor lasers, to plasmonic lasers, and semiconductor optical amplifiers are illustrated.

关键词： Plasmonics

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Making computers look the way we look: Exploiting visual attention for image understanding

Making computers look the way we look: Exploiting visual att...

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作者： Katti, Harish Subramanian, Ramanathan Kankanhalli, Mohan Sebe, Nicu Chua, Tat-Seng Ramakrishnan, Kalpathi R. School of Computing National University of Singapore Singapore Department of Information Engineering and Computer Science University of Trento Italy Department of Electrical Engineering Indian Institute of Science India

ISBN: (纸本)9781605589336

Human Visual attention (HVA) is an important strategy to focus on specific information while observing and understanding visual stimuli. HVA involves making a series of fixations on select locations while performing tasks such as object recognition, scene understanding, etc. We present one of the first works that combines fixation information with automated concept detectors to (i) infer abstract image semantics, and (ii) enhance performance of object detectors. We develop visual attention-based models that sample fixation distributions and fixation transition distributions in regions-of-interest (ROI) to infer abstract semantics such as expressive faces and interactions (such as look, read, etc.). We also exploit eye-gaze information to deduce possible locations and scale of salient concepts and aid state-of-art detectors. A 18% performance increase with over 80% reduction in computational time for a state-of-art object detector [4]. © 2010 ACM.

关键词： Object recognition

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Skel: Generative Software for Producing Skeletal I/O Applications

Skel: Generative Software for Producing Skeletal I/O Applica...

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IEEE International Conference on E-science Workshops

作者： Jeremy Logan Scott Klasky Jay Lofstead Hasan Abbasi Stephane Ethier Ray Grout Seung-Hoe Ku Qing Liu Xiaosong Ma Manish Parashar Norbert Podhorszki Karsten Schwan Matthew Wolf Oak Ridge National Laboratory Oak Ridge TN USA Sandia National Laboratories Albuquerque NM USA Plasma Physics Laboratory Princeton University Princeton NJ USA National Renewable Energy Laboratory Golden CO USA Courant Institute of Mathematical Sciences New York University New York NY USA National Institute for Computational Sciences University of Tennessee Oak Ridge TN USA Department of Computer Science North Carolina State University Raleigh NC USA Department of Electrical & Computer Engineering Rutgers The State University of New Jersey Piscataway NJ USA College of Computing Georgia Tech Atlanta GA USA

Massively parallel computations consist of a mixture of computation, communication, and I/O. Of these three components, implementing an effective parallel I/O solution has often been overlooked by application scientists and has typically been added to large scale simulations only when existing serial techniques have failed. As scientists' teams scaled their codes to run on hundreds of processors, it was common to call on an I/O expert to implement a set of more scalable I/O routines. These routines were easily separated from the calculations and communication, and in many cases, an I/O kernel was derived from the application which could be used for testing I/O performance independent of the application. These I/O kernels developed a life of their own used as a broad measure for comparing different I/O techniques. Unfortunately, as years passed and computation and communication changes required changes to the I/O, the separate I/O kernel used for benchmarking remained static, no longer providing an accurate indicator of the I/O performance of the simulation, and making I/O research less relevant for the application scientists. In this paper we describe a new approach to this problem where I/O kernels are replaced with skeletal I/O applications that are automatically generated from an abstract set of simulation I/O parameters. We realize this abstraction by leveraging the ADIOS [1] middleware's XML I/O specification with additional runtime parameters. Skeletal applications offer all of the benefits of I/O kernels including allowing I/O optimizations to focus on useful I/O patterns. Moreover, since they are automatically generated, it is easy to produce an updated I/O skeleton whenever the simulation's I/O changes. In this paper we analyze the performance of automatically generated I/O skeletal applications for the S3D and GTS codes. We show that these skeletal applications achieve performance comparable to that of the production applications. We wrap up the paper with

关键词： XML Kernel Arrays Benchmark testing Educational institutions Reactive power Hardware

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A network management system based on DPI

A network management system based on DPI

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International Conference on Network-Based Information Systems

作者： Yang, Chu-Sing Liao, Ming-Yi Luo, Mon-Yen Wang, Shin-Min Yeh, C. Eugene Department of Electrical Engineering Institute of Computer and Communication Engineering National Cheng Kung University Taiwan Department of Computer Science and Information Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan National Center for High-Performance Computing Taiwan

ISBN: (纸本)9780769541679

More and more network applications have appeared in recent years. Government, university, industry and individual Internet users and network services need more bandwidth and various network applications. Many new network protocols are proposed so that it is now becoming harder to manage the network. In the conditional network, every network protocol uses the fixed port, the so-called well-known port number. In the past, it was easy to classify and manage the network traffic because we could identify the network service by the port number. However, new types of network applications do not use fixed port number. The method of traffic classification with fixed port number is inadequate. In recent years, the DPI (Deep Packet Inspection) is used to classify the traffic. This study deploys a NMS (network management system) based on DPI and SNMP. The NMS controls the network devices and services according to the traffic classification of DPIS (DPI server). The platform of DPIS is implemented on the Netfilter framework in Linux kernel. © 2010 IEEE.

关键词： Network management

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Realization of multilayer Si/SiO2 super-high N.A. GRIN lens on Si-waveguide coupling to single-mode optical fibre

Realization of multilayer Si/SiO2 super-high N.A. GRIN lens ...

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作者： Loh, Ter-Hoe Wang, Qian Zhu, Jie Ng, Keh-Ting Lai, Yi-Cheng Ho, Seng-Tiong Data Storage Institute 5 Engineering Drive 1 Singapore 117608 Singapore Department of Electrical Engineering and Computer Science Northwestern University Evanston IL 60208 United States

Vertical optical mode-size transformation from 260nm-thick Si-nanowaveguide to 10-12μm matching the single-mode-fibre-core has been demonstrated using compact multilayer Si/SiO2 asymmetric GRIN lens (length :∼24μm)... 详细信息

ISBN: (纸本)9781557528902

关键词： Single mode fibers

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Leukemia cancer classification based on support vector machine

Leukemia cancer classification based on support vector machi...

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8th IEEE International Conference on Industrial Informatics, INDIN 2010

作者： Hsieh, Sung-Huai Wang, Zhenyu Cheng, Po-Hsun Lee, I-Shun Hsieh, Sheau-Ling Lai, Feipei Department of Computer Science and Information Engineering Providence University Taiwan Computing Laboratory Oxford University Oxford United Kingdom Department of Software Engineering National Kaohsiung Normal University Taiwan Department of Computer Science and Information Engineering National Taiwan University Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taiwan Network and Computer Centre National Chiao Tung University Hsin Chu Taiwan

ISBN: (纸本)9781424473007

In the paper, we classify cancer with the Leukemia cancer of medical diagnostic data. Information gain has been adapted for feature selections. A Leukemia cnacer model that utilizes Information Gain based on Support Vector Machines (IG-SVM) techniques and enhancements to evaluate, interpret the cacer classification. The experimental results indicate that the SVM model illustrates the highest accuracy of classifications for Leukemia cancer. © 2010 IEEE.

关键词： Support vector machines

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Spatial temporal simulation of active optoelectronic and plasmonic devices using a multi-level multi-electron FDTD model

Spatial temporal simulation of active optoelectronic and pla...

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OSA-IEEE-COS Advances in Optoelectronics and Micro/Nano-Optics (AOM)

作者： Seng-Tiong Ho Koustuban Ravi Yingyan Huang Qian Wang Bipin Bhola Xi Chen Xiangyu Li Electrical Engineering and Computer Science Department Northwestern University Evanston USA Data Storage Institute Singapore

We introduce a recently developed general computational model for the electromagnetic simulations of complex atomic, molecular, or semiconductor media using the finite difference time domain (FDTD) method based on a multi-level multi-electron (MLME) system. We show how this MLME-FDTD model can be used for spatial-temporal simulation of a wide range of active optoelectronic and plasmonic devices. Realistic simulations ranging from semiconductor lasers, to plasmonic lasers, and semiconductor optical amplifiers are illustrated.

关键词： Computational modeling Laser modes Plasmons Finite difference methods Semiconductor lasers Time domain analysis Cavity resonators

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