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IEEE International Symposium on Parallel and Distributed Processing with Applications and IEEE International Conference on Ubiquitous computing and Communications (ISPA/IUCC)

作者： Qi Li Jiang Zhong Linjiang Zheng Xue Li College of Computer Science Chongqing university Chongqing China Ministry of Education Key Laboratory of Dependable Service Computing in Cyber Physical Society Chongqing China School of Information Technology and Electrical Engineering University of Queensland Brisbane Australia

ISBN: (纸本)9781538637913

With the graph data scale constantly expanding, the personal computer has brought in severe challenge for the traditional graph partitioning because of its limited memory capacity. The streaming model has been applied in graph partitioning in recent years because it is more efficient than offline partitioning. However, the cache storage structure of original streaming method is inefficient for searching operations on the one hand, on the other hand, the efficiency gradually is reduced with the number of vertices which have been allocated increased because there is no space left for storing more in memory. A caching strategy for streaming algorithm is put forward in this paper including efficient cache storage structure, which uses the vertex and its neighbors' subset information as basic entry. The cache management module manages cache content. Our method is effective on the condition whether it has limitation to cache capacity or not. By using our cache strategy, it only takes about 25 minutes for partitioning twitter-2010 that have 1.4 billion edges while the original streaming method needs 42 minutes, As can prove the effectiveness and superiority of our method.

关键词： Partitioning algorithms Silicon Cache storage Liquid crystal on silicon Conferences Computer science Microcomputers

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Blind image deblurring via adaptive dynamical system learning

Blind image deblurring via adaptive dynamical system learnin...

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IEEE International Conference on Multimedia and Expo (ICME)

作者： Risheng Liu Shichao Cheng Xin Fan Zhongxuan Luo Key Laboratory for Ubiquitous Network and Service Software of Liaoning Province Department of Computing The Hong Kong Polytechnic University DUT-RU International School of Information & Software Engineering Dalian University of Technology School of Mathematical Sciences Dalian University of Technology Dalian University of Technology Dalian Liaoning CN

ISBN: (纸本)9781509060689

Blind image deblurring is one of the main phases in most media analysis tasks. Many existing works aim to simultaneously estimate the latent image and the blur kernel under a MAP framework. However, it has been demonstrated that such joint estimation strategies may lead to the undesired trivial solution. In this paper, we propose a learnable nonlinear dynamical system to formulate the image propagation so that the blur kernel estimation can be efficiently controlled by both cues and training data. Our analysis also indicates that the proposed dynamical system is feasible on image modeling socialities. Experimental results on different benchmark image sets evaluate the effectiveness of our proposed approach.

关键词： Kernel Estimation Deconvolution Image restoration Adaptive systems Nonlinear dynamical systems Training data

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Path restoring algorithm based on vehicle trajectory mining

Path restoring algorithm based on vehicle trajectory mining

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IEEE International Conference on Big Data Analysis (ICBDA)

作者： Yuanhui Sun Yaying Zhang Key Laboratory of Embedded System and Service Computing Tongji University Shanghai China

ISBN: (纸本)9781467395922

Path restoring is a path searching problem in the time-dependent road network with the time constraints of origin and destination. This paper proposes a path restoring algorithm to find the possible path that vehicles may have been driving along. We mined the vehicle trajectories based on historical GPS data and then build a “popular” intersection graph based on its entropy and frequency. Then the restoring path is searched on the sub-graph of the popular intersection graph. The experiment result shows that the proposed algorithm increases 10% compared to that of using time-dependent fastest path method.

关键词： Vehicles Trajectory Roads Entropy TV Heuristic algorithms Algorithm design and analysis

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Finite-time Cluster Synchronization of Complex Networks With Time-Varying Delays

Finite-time Cluster Synchronization of Complex Networks With...

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第28届中国控制与决策会议

作者： Xiwei Liu Shaohua Li Department of Computer Science and Technology Tongji University The Key Laboratory of Embedded System and Service Computing Ministry of Education

ISBN: (纸本)9781467397155

In this paper,we study the finite-time cluster synchronization of complex networks with time *** are two different types of time-varying delays in the network:the internal time delay and the coupling ***'s more,we assume that coupling time-varying delays exist only between nodes in different clusters,while no delay happens between nodes in the same cluster,which is more consistent with the real *** on the Lyapunov stability theorem,sufficient conditions are derived to guarantee the realization of the finite-time cluster ***,numerical simulations are provided to support the obtained theoretical results.

关键词： Complex network Cluster synchronization Finite-time Time-varying delays

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Modeling and Control of Urban Expressways with Emergency using Hybrid Petri Nets

Modeling and Control of Urban Expressways with Emergency usi...

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IEEE International Conference on systems, Man, and Cybernetics

作者： Yaying Zhang Yuefeng Fu Wei Qiang Key Laboratory of Embedded System and Service Computing Tongji University Shanghai China

ISBN: (纸本)9781509018987

The urban expressway system model based on hybrid petri nets is proposed. With the traffic detecting cameras and coils, the strategies of traffic signal lights and warning lights are enforced with the aim to prevent the large-scale congestion in emergencies (e.g. accidents). The simulation results verify the effectiveness of the proposed model and the warning light strategy is demonstrated to be suitable for traffic accidents and congestion in the accident-prone weaving sections in the urban expressways.

关键词： warning light strategy Hybrid petri nets urban expressway model emergency control

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Optimal stopping theory based fast coding tree unit decision for high efficiency video coding

Optimal stopping theory based fast coding tree unit decision...

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IEEE Visual Communications and Image Processing (VCIP)

作者： Xiuzhe Wu Hanli Wang Zhihua Wei Key Laboratory of Embedded System and Service Computing Tongji University Shanghai China

ISBN: (纸本)9781509053179

High Efficiency Video Coding (HEVC) is the most recent video coding standard aiming to further reduce the bitrate over 50% as compared to the state-of-the-art H.264/Advanced Video Coding under the same visual quality. In order to achieve this, a number of advanced coding techniques have been adopted in HEVC, including the quadtree structure of Coding Unit (CU), Prediction Unit (PU) and Transform Unit (TU), etc. However, these coding techniques lead to a tremendous increase in HEVC encoding computations. In order to reduce the HEVC encoding computational complexity, the optimal stopping theory is employed herein to design an efficient algorithm to optimize the decision making process when choosing the best coding parameters of CU, PU and TU. Extensive comparative experimental results are performed by the proposed algorithm and another two recent works, which demonstrate that the proposed algorithm is very efficient and better in reducing the HEVC encoding computations while keeping the video quality and compression efficiency almost intact.

关键词： Encoding Decision making Algorithm design and analysis Optimization High efficiency video coding Bit rate

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Weighted H-index for identifying influential spreaders

arXiv

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arXiv 2017年

作者： Yu, Senbin Gao, Liang Wang, Yi-Fan Gao, Ge Zhou, Congcong Gao, Zi-You Institute of Transportation Systems Science and Engineering Moe Key Laboratory of Urban Transportation System Theory and Technology State Key Laboratory of Rail Traffic Control and Safety Center of Cooperative Innovation for Beijing Metropolitan Transportation Beijing Jiaotong University Beijing100044 Yinchuan Municipal Bureau of Big Data Management and Service Yinchuan750011

Spreading is a ubiquitous process in the social, biological and technological systems. Therefore, identifying influential spreaders, which is important to prevent epidemic spreading and to establish effective vaccination strategies, is full of theoretical and practical significance. In this paper, a weighted h-index centrality based on virtual nodes extension is proposed to quantify the spreading influence of nodes in complex networks. Simulation results on real-world networks reveal that the proposed method provides more accurate and more consistent ranking than the five classical methods. Moreover, we observe that the monotonicity and the computational complexity of our measure can also yield excellent performance. Copyright © 2017, The Authors. All rights reserved.

关键词： Complex networks

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Data Driven Development Trend Analysis of Mainstream Information Technologies 9

Data Driven Development Trend Analysis of Mainstream Informa...

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9th International Conference on service Science, ICSS 2016

作者： Wen, Junhao Sun, Guanghui Luo, Fengji Key Laboratory of Dependable Service Computing in Cyber Physical Society Chongqing University Chongqing China Faculty of Engineering and Information Technology University of Sydney SydneyNSW Australia

ISBN: (纸本)9781509027279

Software developers often find answers to their programming issues on the Internet. Q&A (Question & Answer) websites has been becoming more and more popular. Among the available technical Q&A sites, the most prevalent one is the Stack Overflow, it has been becoming one of the invaluable knowledge repositories. The development trends of language and mainstream operation systems are discussed by using the SVD (Singular Value Decomposition) and K-means algorithm in this paper. Some key findings include: Traditional programming languages such as C#, C++, C develop slowly and the light script languages such as Php, JavaScript and Python develop rapidly, traditional operation systems such as Windows and Linux develop slowly and the mobile devices operation systems such as IOS and Android develop rapidly. Through studying and analyzing the development of mainstream technology, people can grasp the dynamic situation of the software field, which has important and far-reaching significance to guide the work of software engineering. © 2016 IEEE.

关键词： Websites

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Learning with only multiple instance positive bags

Learning with only multiple instance positive bags

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2016 International Joint Conference on Neural Networks, IJCNN 2016

作者： Wang, Zhigang Zhao, Zengshun Zhang, Changshui Computer and Communication Engineering School Tianjin University of Technology Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology China Key Laboratory of Computer Vision and System Tianjin University of Technology Ministry of Education China College of Electronics Communication and Physics Shandong University of Science and Technology China Automation Department Tsinghua University State Key Laboratory of Intelligent Technology and Systems Tsinghua National Laboratory for Information Science and Technology China

ISBN: (纸本)9781509006199

In traditional multiple instance learning (MIL), both positive and negative bags are required to learn a prediction function. However, a high human cost is needed to know the label of each bag - positive or negative. Only positive bags contain our focus (positive instances) while negative bags consist of noise or background (negative instances). So we do not expect to spend too much to label the negative bags. Contrary to our expectation, nearly all existing MIL methods require enough negative bags besides positive ones. In this paper we propose an algorithm called 'Positive Multiple Instance' (PMI), which learns a classifier given only a set of positive bags. So the annotation of negative bags becomes unnecessary in our method. PMI is constructed based on the assumption that the unknown positive instances in positive bags be similar each other and constitute one compact cluster in feature space and the negative instances locate outside this cluster. The experimental results demonstrate that PMI achieves the performances close to or a little worse than those of the traditional MIL algorithms on benchmark and real data sets. However, the number of training bags in PMI is reduced significantly compared with traditional MIL algorithms. © 2016 IEEE.

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Shell structure of the neutron-rich isotopes Co69,71,73

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Physical Review C 2020年第3期101卷 034314-034314页

作者： T. Lokotko S. Leblond J. Lee P. Doornenbal A. Obertelli A. Poves F. Nowacki K. Ogata K. Yoshida G. Authelet H. Baba D. Calvet F. Château S. Chen A. Corsi A. Delbart J.-M. Gheller A. Gillibert T. Isobe V. Lapoux M. Matsushita S. Momiyama T. Motobayashi M. Niikura H. Otsu C. Péron A. Peyaud E. C. Pollacco J.-Y. Roussé H. Sakurai C. Santamaria Z. Y. Xu M. Sasano Y. Shiga S. Takeuchi R. Taniuchi T. Uesaka H. Wang V. Werner F. Browne L. X. Chung Zs. Dombradi S. Franchoo F. Giacoppo A. Gottardo K. Hadynska-Klek Z. Korkulu S. Koyama Y. Kubota M. Lettmann C. Louchart R. Lozeva K. Matsui T. Miyazaki S. Nishimura L. Olivier S. Ota Z. Patel E. Sahin C. Shand P.-A. Söderström I. Stefan D. Steppenbeck T. Sumikama D. Suzuki Zs. Vajta J. Wu Department of Physics The University of Hong Kong Pokfulam Hong Kong RIKEN Nishina Center 2-1 Hirosawa Wako Saitama 351-0198 Japan CEA Centre de Saclay IRFU/Service de Physique Nucléaire F-91191 Gif-sur-Yvette France Departmento de Fisica Teorica and IFT-UAM/CSIC Universidad Autónoma de Madrid Madrid Spain IPHC IN2P3/CNRS Université de Strasbourg 67037 Strasbourg France Research Center for Nuclear Physics (RCNP) Osaka University Ibaraki 567-0047 Japan Department of Physics Osaka City University Osaka 558-8585 Japan Advanced Science Research Center Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan Center for Nuclear Study University of Tokyo RIKEN campus Wako Saitama 351-0198 Japan Department of Physics University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan Department of Physics Rikkyo University 3-34-1 Nishi-Ikebukuro Toshima Tokyo 172-8501 Japan Institut für Kernphysik Technische Universität Darmstadt 64289 Darmstadt Germany School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Institute for Nuclear Science & Technology VINATOM P.O. Box 5T-160 Nghia Do Hanoi Vietnam MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Institut de Physique Nucléaire d'Orsay IN2P3-CNRS F-91406 Orsay Cedex France Department of Physics University of Oslo N-0316 Oslo Norway CSNSM IN2P3/CNRS Université Paris-Saclay 91405 Orsay Campus France Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Department of Physics Tohoku University Sendai 980-8578 Japan State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People's Republic of China

The structures of the neutron-rich Co69,71,73 isotopes were investigated via (p,2p) knockout reactions at the Radioactive Isotope Beam Factory, RIKEN. Isotopes of interest were studied using the DALI2 γ-ray detector array combined with the MINOS target and tracker system. Level schemes were reconstructed using the γ−γ coincidence technique, with tentative spin-parity assignments based on the measured inclusive and exclusive cross sections. Comparison with shell-model calculations using the Lenzi-Nowacki-Poves-Sieja LNPS and PFSDG-U interactions suggests coexistence of spherical and deformed shapes at low excitation energies in the Co69,71,73 isotopes. The distorted-wave impulse approximation (DWIA) framework was used to calculate the single-particle cross sections. These values were compared with the experimental findings.

关键词： Direct reactions Nuclear reactions Nuclear structure & decays Shell model 59 ≤ A ≤ 89 Radioactive beams

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