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26th International Conference on Computer Supported Cooperative Work in Design, CSCWD 2023

作者： Tu, Chengwu Zhao, Shengjie Deng, Hao Tongji University School of Software Engineering Shanghai201800 China Key Laboratory of Embedded System and Service Computing Shanghai201800 China Engineering Research Center of Key Software Technologies for Smart City Perception and Planning Ministry of Education Shanghai201800 China

ISBN: (纸本)9798350331684

To deal with the discrepancy between global and local objectives in the federated learning invoked by the non-independent, identically distributed (non-IID) data and mitigate the impact of catastrophic forgetting in the training phase, we propose a federated learning framework with data distribution-wise reinforcement learning to perform node selection to accelerate the convergence process and alleviate the accuracy degradation. In this framework, the agent on the central server observes the number of samples every node owns, the derived distribution information of every dataset, and the current local and global accuracy. Then infer the selected node-set to participate in the current federated learning round through policy network in reinforcement learning. Finally, we conduct simulations with publicly data sets. Simulation results indicate that our FedWNS outperforms the existing FedAvg and CSFedAvg on the testing accuracy and the communication rounds to reach target accuracy under different settings. © 2023 IEEE.

关键词： Reinforcement learning

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Robust control reconfiguration of resource allocation systems with Petri nets and integer programming

Robust control reconfiguration of resource allocation system...

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作者： Li, Jun Zhou, Mengchu Guo, Tao Gan, Yahui Dai, Xianzhong Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education China School of Automation Southeast University Nanjing 210096 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 201804 China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102 United States

Supervisory control reconfiguration can handle the uncertainties including resource failures and task changes in discrete event systems. It was not addressed to exploit the robustness of closed-loop systems to accommodate some uncertainties in the prior studies. Such exploitation can cost-efficiently achieve reconfigurability and flexibility for real systems. This paper presents a robust reconfiguration method based on Petri nets (PNs) and integer programming for supervisory control of resource allocation systems (RASs) subject to varying resource allocation relationships. An allocation relationship is seen as a control specification while the execution processes requiring resources as an uncontrolled plant. First, a robust reconfiguration mechanism is proposed. It includes updating the P-invariant-based supervisor and evolving the state of the closed-loop system. The latter adapts to the control specification changes by the self-regulation of the closed-loop system's state. Next, two novel integer programming models for control reconfiguration are proposed, called a reconfiguration model with acceptability and reconfiguration one with specification correction. Since both models integrate the firability condition of transitions, no additional efforts are required for the state reachability analysis. Finally, a hospital emergency service system is used as an example to illustrate them. © 2014 Elsevier Ltd. All rights reserved.

关键词： Integer programming

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Reply to Comments on 'Direct-Splitting-Based CN-FDTD for Modeling 2D Material Nanostructure Problems'

IEEE Open Journal of Antennas and Propagation

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IEEE Open Journal of Antennas and Propagation 2021年 2卷 676-678页

作者： Feng, Naixing Zhang, Yuxian Zeng, Qingsheng Tong, Mei Song Joines, William T. Wang, Guo Ping Institute of Microscale Optoelectronics Shenzhen University Shenzhen China College of Astronautics Nanjing University of Aeronautics and Astronautics Nanjing China Key Laboratory of Embedded System and Service Computing of the Ministry of Education College of Electronics and Information Engineering Tongji University Shanghai China Department of Electrical and Computer Engineering Duke University DurhamNC United States

In this response letter, we focus on addressing Yu Hang Yang's comments so that the correctness and validity of the proposed auxiliary-differential-equation-based (ADE) Crank-Nicolson finite-difference time-domain method with direct-splitting technique (CNDS-FDTD) are demonstrated. Moreover, related applications in modeling 2D material nanostructure problems are shown. © 2020 IEEE.

关键词： Finite difference time domain method

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Electroencephalogram evidence for mirror neuron activity during the observation of drawn hand motion

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Neural Regeneration Research 2011年第18期6卷 1398-1403页

作者： Huaping Zhu Yaoru Sun Wenya Duan Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China School of Computer and Information Engineering Jiangxi Normal University Nanchang 330022 Jiangxi Province China

The present study used electroencephalography to examine mu rhythm suppression （a putative index of human mirror neuron system activation） at frontal sites （F3, Fz and F4）, central sites （C3, Cz and C4）, parietal sites （P3, Pz and P4） and occipital sites （O1 and O2）, while subjects observed real hand motion （real hand motion condition） and illustrative depictions of hand motion （drawn hand motion condition）. Experimental data revealed that mu rhythm suppression was exhibited in the mirror neuron system when subjects observed both real and drawn hand motion. Moreover, the mu rhythm recorded at the F3, Fz, F4, and Pz poles was significantly suppressed while observing both stimulus types, but no obvious mu suppression occurred at the O1, 02 and 03 poles. These results suggest that the observation of drawings of human hand actions can activate the human mirror neuron system. This evidence supports the hypothesis that the mirror neuron system may be involved in intransitively abstract action understanding.

关键词： drawn hand motion human mirror neuron direct matching hypothesis mu rhythm event-related desynchronization

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A speed estimation method of vehicles based on road monitoring video-images

A speed estimation method of vehicles based on road monitori...

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International Conference on Applications and Techniques in Cyber Security and Intelligence, ATCSI 2017

作者： Huixian, Duan Jun, Wang Lei, Song Yixin, Zhao Liu, Na The Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China Cyber Physical System R&D Center The Third Research Institute of Ministry of Public Security Shanghai China Shanghai International Technology and Trade United Co. Ltd Shanghai China

ISBN: (纸本)9783319670706

In order to reduce traffic accidents and road congestion in many cities, vehicle speed estimation is very critical and important to observe speed limitation law and traffic conditions. In this paper, we present a speed estimation method of vehicles based on road monitoring video-images. Firstly, we set up a word coordinate system on the license plate in one vehicle image. Next, for small vehicles in China, according to the known length and width of the license plate, the spatial transformation matrix between the word coordinate system and the image coordinate system is derived. Then, based on the spatial transform matrix, compute the corner spatial coordinates of the license plate in each frame, and then estimate the vehicle speed. Finally, experimental results on read data have shown that the vehicle speed can be estimated within the acceptable error range (±3 km/h), and then have demonstrated the effectiveness of the proposed vehicle speed estimation method. © 2018, Springer International Publishing AG.

关键词： Speed

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Fast mode decision based on optimal stopping theory for multiview video coding

Fast mode decision based on optimal stopping theory for mult...

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19th International Conference on Advances in Multimedia Modeling, MMM 2013

作者： Wang, Hanli Heng, Yue Zhao, Tiesong Xiao, Bo Department of Computer Science and Technology Tongji University Shanghai 201804 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China Department of Electrical and Computer Engineering University of Waterloo Waterloo ON Canada

ISBN: (纸本)9783642357275

Optimal stopping theory is developed to achieve a good trade-off between decision performance and decision efforts such as the consumed decision time. In this paper, the optimal stopping theory is applied to fast mode decision for multiview video coding in order to reduce the tremendous encoding computational complexity, with the benefit of theoretical decision-making expectation and predictable decision performance. The characteristics of encoding modes in multiview video coding are studied to derive an optimal stopping theory-based model to early terminate mode decision and thus a fast mode decision algorithm is designed. Extensive experimental results demonstrate that the proposed algorithm can save a great amount of encoding time for multiview video coding and meanwhile keep the compression performance more or less intact. © Springer-Verlag 2013.

关键词： Decision making

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service on demand of transportation information grid system model and analysis based on TCPN

Service on demand of transportation information grid system ...

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2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Li, Jingxia Zhao, Huijuan Wu, Guodong School of Information and Computer Science Anhui Agricultural University Hefei Anhui Province China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China Information College Shanghai Ocean University Shanghai China

ISBN: (纸本)9780769546476

Along with the application and popularity of transportation information grid system, users become more and more, original configuration can't meet actual demand. In this paper we establish timed colored Petri net process model for service On Demand process, which is one of the main service provided by the system. Through simulating increasing users and the amount of processes waiting for service On Demand request, we analysis request response time change, and provide beneficial reference for extension of system configuration. © 2012 IEEE.

关键词： Petri nets

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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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Research on Practical Implementation of Binary Arithmetic Coding with Forbidden Symbol for Error Resilience

Research on Practical Implementation of Binary Arithmetic Co...

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2011 International Conference on Frontiers in Computer education(ICFCE 2011)

作者： Wei Zhang Feng Cen Fanglai Zhu The Key Laboratory of Embedded System and Service Computing Ministry of Education Department of Control Science & Engineering Tongji University

Arithmetic coding is a widely applied compression tool with superior coding efficiency to other entropy coding methodsHowever, it suffers from the error resilience and complexityIn this paper, the integer implementation of binary arithmetic coding with forbidden symbol for error resilience is studiedCoding redundancies for employing different quantization coefficients in probability representation and cost effective backtracking distance in bits for maximum a posteriori(MAP) decoding are studied in depthWe observe that the optimal quantization coefficients are independent of forbidden symbol and the probabilities of source and the cost effective backtracking distance is related to the source entropy and the given forbidden symbol probabilitiesSuch observations are also demonstrated by extensive experiments.

关键词： Arithmetic coding Forbidden symbol Error resilience MAP

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Lag Quasi-synchronization of Nonlinear Coupled Networks via Aperiodically Intermittent Pinning Control

Lag Quasi-synchronization of Nonlinear Coupled Networks via ...

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第27届中国控制与决策会议

作者： Xiwei Liu Ying Liu Department of Computer Science and Technology Tongji Universityand with the Key Laboratory of Embedded System and Service ComputingMinistry of Education

ISBN: (纸本)9781479970186

The lag quasi-synchronization of nonlinear coupled networks with time-varying delay in the presence of parameter mismatches by using aperiodically intermittent pinning control is investigated in this *** paper has two main differences with previous works:one is that the type of the intermittent pinning control is aperiodic while that in previous works is periodic;the other is that the coupling function we choose is *** utilizing the aperiodically intermittent pinning control idea,we pin the coupled networks by a simple controller to achieve the lag *** sufficient criteria are obtained to guarantee lag *** last,some simulations are presented to verify the correctness of the obtained theoretical results.

关键词： Aperiodic Intermittent Lag Nonlinear coupling Quasi-synchronization

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