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Synchronous oscillations in networks of time-delay coupled inert systems

IFAC-PapersOnLine 2015年第18期48卷 31-36页

作者： E. Steur C. van Leeuwen A. Pogromsky KU Leuven Laboratory for Perceptual Dynamics Eindhoven University of Technology Department of Mechanical Engineering and Saint-Petersburg National Research University of Information Technologies Mechanics and Optics Department of Control Systems and Informatics Eindhoven University of Technology Institute for Complex Molecular Systems and Department of Mechanical Engineering

We discuss the emergence of oscillations in networks of inert single-input-single-output systems which interact via linear, time-delay coupling functions. We present conditions for 1. the solutions of the time-delay coupled systems to be bounded, 2. the network equilibrium to be unique, and 3. the network equilibrium to be unstable. If these conditions are all satisfied the network of time-delay coupled inert systems has a non-trivial oscillatory solution. In addition, we show that a necessary and sufficient condition for the emerge of oscillations in such networks is that the considered systems are at least second order. Moreover, using recent results on the existence of partial synchronization manifolds, we identify the patterns of oscillation that may emerge.

关键词： Coupling Instability Networks Oscillation Synchronization Time-delay

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A new emission model including on-ramps for two-class freeway traffic control

A new emission model including on-ramps for two-class freewa...

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International IEEE Conference on Intelligent Transportation Systems

作者： C. Pasquale S. Liu S. Siri S. Sacone B. De Schutter the Department of Informatics Bioengineering Robotics and Systems Engineering University of Genova Italy. the Delft Center for Systems and Control Delft University of Technology The Netherlands.

ISBN: (纸本)9781467365970

The main objective of this paper is to propose a new two-class macroscopic emission model to describe the pollutant emissions produced by freeway traffic. The innovative aspect of the proposed model consists in considering the on-ramp emissions, which are explicitly modeled for different traffic scenarios. Next, a two-class local controller based on a ramp metering is reported with the aim of minimizing emissions and congestion in the freeway system. The relevance of the on-ramp emission model is in this way highlighted, since ramp metering may lead to creation of queues at the entering on-ramps and hence a concentration of pollutants on these on-ramps. Simulation results show the effectiveness of the proposed control strategy for a case of study.

关键词： pollutant emissions proposed case of study Emissions On ramps Ramp metering DISCHARGE OF POLLUTANTS Freeway emission Pollutant control strategy Case studies Queue local controller Traffic

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Resource Usage Prediction Algorithms for Optimal Selection of Multimedia Content Delivery Methods

Resource Usage Prediction Algorithms for Optimal Selection o...

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IEEE International Conference on Communications

作者： Yiannos Kryftis Constandinos X. Mavromoustakis Joel J. P. C. Rodrigues George Mastorakis Evangelos Pallis Ciprian Dobre Jordi Mongay Batalla Georgios Kormentzas Department of Computer Science University of Nicosia Department of Informatics Instituto de Telecomunicacoes University of Beira Interior Portugal and University ITMO Department of Informatics Engineering Technological Educational Institute of Crete Faculty of Autonomic Control and Computers University Politehnica of Bucharest National Institute of Telecommunications Department of Information and Communication Systems Engineering University of the Aegean

ISBN: (纸本)9781467364300

This paper proposes two algorithms adopted in a prototype network architecture, for optimal selection of multimedia content delivery methods, as well as balanced delivery load, by exploiting a novel resource prediction engine. The proposed architecture exploits both algorithms for the prediction of future multimedia services demands, by providing the ability to keep optimal the distribution of the streaming data, among Content Delivery Networks, cloud-based providers and Home Media Gateways. In addition, the prediction of the upcoming fluctuations of the network, provides the ability to the proposed network architecture, achieving optimized Quality of Service (QoS) and Quality of Experience (QoE) for the end users. Both algorithms were evaluated to establish their efficiency, towards effectively predicting future network traffic demands. The experimental results validated their performance and indicated fields for further research and experimentation.

关键词： Resource Prediction Engine Resource Usage Prediction Algorithms Content Delivery Networks Multimedia Services Systems

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Data mining of a remote behavioral tracking system for type 2 diabetes patients: A prospective cohort study

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JMIR Diabetes 2016年第1期1卷 e1页

作者： Wayne, Noah Cercone, Nick Li, Jiye Zohar, Ariel Katz, Joel Brown, Patrick Ritvo, Paul Health Behaviour Change Lab School of Kinesiology and Health Science York University Toronto ON Canada Data Mining Lab Lassonde School of Engineering York University Toronto ON Canada Pain Mechanisms Lab Department of Psychology York University Toronto ON Canada Division of Biostatistics Dalla Lana School of Public Health University of Toronto Toronto ON Canada Analytics and Informatics Prevention and Cancer Control Cancer Care Ontario Toronto ON Canada

Background: Complications from type 2 diabetes mellitus can be prevented when patients perform health behaviors such as vigorous exercise and glucose-regulated diet. The use of smartphones for tracking such behaviors has demonstrated success in type 2 diabetes management while generating repositories of analyzable digital data, which, when better understood, may help improve care. Data mining methods were used in this study to better understand self-monitoring patterns using smartphone tracking software. Objective: Associations were evaluated between the smartphone monitoring of health behaviors and HbA1c reductions in a patient subsample with type 2 diabetes who demonstrated clinically significant benefits after participation in a randomized controlled trial. Methods: A priori association-rule algorithms, implemented in the C language, were applied to app-discretized use data involving three primary health behavior trackers (exercise, diet, and glucose monitoring) from 29 participants who achieved clinically significant HbA1c reductions. Use was evaluated in relation to improved HbA1c outcomes. Results: Analyses indicated that nearly a third (9/29, 31%) of participants used a single tracker, half (14/29, 48%) used two primary trackers, and the remainder (6/29, 21%) of the participants used three primary trackers. Decreases in HbA1c were observed across all groups (0.97-1.95%), but clinically significant reductions were more likely with use of one or two trackers rather than use of three trackers (OR 0.18, P=.04). Conclusions: Data mining techniques can reveal relevant coherent behavior patterns useful in guiding future intervention structure. It appears that focusing on using one or two trackers, in a symbolic function, was more effective (in this sample) than regular use of all three trackers. © Noah Wayne, Nick Cercone, Jiye Li, Ariel Zohar, Joel Katz, Patrick Brown, Paul Ritvo. Originally published in JMIR Diabetes (http://***), 06.04.2016. This is

关键词： Data mining Diabetes mellitus Health coaching Mhealth Telehealth Type 2

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Ćuk converter full state adaptive observer design

Ćuk converter full state adaptive observer design

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IEEE Conference on control Technology and Applications (CCTA)

作者： A. Pyrkin R. Ortega A. Bobtsov S. Aranovskiy D. Gerasimov Department of Control Systems and Informatics ITMO University Saint Petersburg Russia LSS-Supelec Gif-sur-Yvette France Laboratory “Control of Complex Systems” Institute for Problems of Mechanical Engineering Saint Petersburg Russia

A novel approach to the problem of partial state estimation of a class of nonlinear systems is proposed. In this paper we apply the new adaptive observer design technique to power converters. For the sake of ease of exposition we preferred to concentrate on the specific example of the Ćuk power converter. The main idea is to translate the state estimation problem into one of estimation of constant, unknown parameters related to the systems initial conditions. The proposed observer is shown to be applicable for the reconstruction of the state of power converters for further using in the full-state feedback controller. Comparison with Immersion and Invariance technique for the observer design is made via numerical examples.

关键词： Observers Voltage control Switches Mathematical model Conferences

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Publisher Correction: Transcriptomic alterations during ageing reflect the shift from cancer to degenerative diseases in the elderly

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Nature communications 2019年第1期10卷 2459页

作者： Peer Aramillo Irizar Sascha Schäuble Daniela Esser Marco Groth Christiane Frahm Steffen Priebe Mario Baumgart Nils Hartmann Shiva Marthandan Uwe Menzel Jule Müller Silvio Schmidt Volker Ast Amke Caliebe Rainer König Michael Krawczak Michael Ristow Stefan Schuster Alessandro Cellerino Stephan Diekmann Christoph Englert Peter Hemmerich Jürgen Sühnel Reinhard Guthke Otto W Witte Matthias Platzer Eytan Ruppin Christoph Kaleta Research Group Medical Systems Biology Institute of Experimental Medicine Christian-Albrechts-University Kiel D-24105 Kiel Germany. Jena University Language and Information Engineering Lab Friedrich-Schiller-University Jena D-07743 Jena Germany. GerontoSys JenAge Consortium D-07745 Jena Germany. Genome Analysis Lab Leibniz Institute on Aging-Fritz-Lipmann-Institute D-07745 Jena Germany. Hans Berger Department of Neurology Jena University Hospital D-07747 Jena Germany. Systems Biology and Bioinformatics Group Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute D-07745 Jena Germany. Biology of Ageing Lab Leibniz Institute on Aging-Fritz-Lipmann-Institute D-07745 Jena Germany. Molecular Genetics Lab Leibniz Institute on Aging-Fritz-Lipmann-Institute D-07745 Jena Germany. Imageing Facility Leibniz Institute on Aging-Fritz-Lipmann-Institute D-07745 Jena Germany. Integrated Research and Treatment Center Center for Sepsis Control and Care (CSCC) Jena University Hospital D-07747 Jena Germany. Network Modeling Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute D-07745 Jena Germany. Institute for Medical Informatics and Statistics Christian-Albrechts-University Kiel D-24105 Kiel Germany. Energy Metabolism Laboratory Swiss Federal Institute of Technology (ETH) Zurich Schwerzenbach/Zürich CH-8603 Switzerland. Department of Bioinformatics Friedrich-Schiller-University Jena D-07743 Jena Germany. Laboratory of Neurobiology Scuola Normale Superiore University of Pisa I-56100 Pisa Italy. Molecular Biology Lab Leibniz Institute on Aging-Fritz-Lipmann-Institute D-07745 Jena Germany. Faculty of Biology and Pharmacy Friedrich-Schiller-University Jena D-07743 Jena Germany. Biocomputing Lab Leibniz Institute on Aging-Fritz-Lipmann-Institute D-07745 Jena Germany. Department of Computer Science and Center for Bioinformatics and Computational Biology University of Maryland College Park M

The original version of this Article contained an error in the spelling of the author Jule Müller, which was incorrectly given as Julia Müller. Additionally, in Fig. 4a, the blue-red colour scale for fold change in ageing/disease regulation included a blue stripe in place of a red stripe at the right-hand end of the scale. These errors have been corrected in both the PDF and HTML versions of the Article.

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Fuzzy control of an anaerobic digestion process

Fuzzy control of an anaerobic digestion process

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Radu-Emil Precup Claudia-Adina Bojan-Dragos Marian Barbu Sergiu Caraman Department of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania Dept. of Automatic Control and Electrical Engineering “Dunarea de Jos” University of Galati Galati Romania

The paper proposes a simple Takagi-Sugeno PI-fuzzy controller for an anaerobic digestion process. A fifth order nonlinear model of the anaerobic digestion process is first presented. A second order linear model of the process is next proposed, and the parameters of the linear model are obtained from an optimization problem solved by a Gravitational Search Algorithm. A PI controller is designed for the linear process model using a frequency domain approach in terms of imposing the phase margin. The Takagi-Sugeno PI-fuzzy controller is designed on the basis of the linear PI controller. The Takagi-Sugeno PI-fuzzy controller is validated by simulation using the nonlinear process model in the fuzzy control system.

关键词： Mathematical model Process control control systems Fuzzy control Takagi-Sugeno model Modeling Biological system modeling

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On the Perceived Quality Evaluation of Opportunistic Mobile P2P Scalable Video Streaming

On the Perceived Quality Evaluation of Opportunistic Mobile ...

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International Wireless Communications and Mobile Computing Conference

作者： Constandinos X. Mavromoustakis George Mastorakis Evangelos Pallis Charalambos Mysirlidis Tasos Dagiuklas Ilias Politis Ciprian Dobre Katerina Papanikolaou Computer Science Department University of Nicosia Department of Informatics Engineering Technological Educational Institute of Crete School of Science and Technology Hellenic Open University Faculty of Autonomic Control and Computers University Politehnica of Bucharest Department of Computer Science and Engineering European University Cyprus

ISBN: (纸本)9781479953455

This paper studies the evaluation of the video streaming over Mobile Peer-to-Peer (MP2P) networks using Scalable Video Coding. The proposed research framework exploits the MP2P diversity characteristics where each node acts as a Mobile Peer for every neighboring node in a relay-based communicating path. Mobile Peers use a common look-up table to request video streaming resources in order to estimate the video packets transfer duration in the end-to-end path. The collaborative streaming is achieved through the data packets replication policy, which uses a bounded upper time limitation for the video packets of each layer (Use of Scalable Video). Each node/device utilizes a specified amount of capacity for both channel and storage purposes. Different scenarios have been introduced in this paper towards evaluating the video streaming policy in the MP2P system, using a real-time probabilistic Fractional Brownian Motion (FBM) and a Random Waypoint (RWP) Mobility model. In both models, nodes move according to certain probabilities, location and time. Intermittent connectivity occurs while nodes claim video streams, whereas promiscuous caching policy enables -where possible-recoverability of lost packets offering priority to packets from the base layer. The simulation results show that FBM provides better objective and subjective quality results for two video sequences resolution, in the MP2P network configuration.

关键词： Mobile Peer-to-Peer Video Streaming Scalable Video Streaming Quality evaluation of video streaming

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The effect of latency increasing on the realisation cost in high level synthesis of pipeline systems

Periodica polytechnica Electrical engineering and computer s...

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Periodica polytechnica Electrical engineering and computer science 2014年第2期58卷 37-42页

作者： Pilászy, György Rácz, György Arató, Péter Department of Control Engineering and Information Technology Faculty of Electrical Engineering and Informatics BME Magyar tudósok krt 2. BudapestH-1117 Hungary

This paper examines the effects of increasing the latency in pipeline systems. The high level synthesis methods focus on the pipeline throughput only, and the latency is an output parameter. The proposed method is capable for reducing the cost of the implementation by increasing the latency at the same throughput. The essence of the proposed method is that an increase in the latency may increase the mobility ranges of the processing units. Thus, the increased degrees of freedom may cause better implementation by affecting the scheduling and allocation steps. An impact assessment algorithm for calculating proper latency increment range is also presented. © 2014, Technical University of Budapest. All rights reserved.

关键词： Embedded systems

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Channel capacity under measurement-based model for cooperative vehicular ad hoc networks

Channel capacity under measurement-based model for cooperati...

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Antennas and Propagation Society International Symposium

作者： Ruifeng Chen Zhengguo Sheng Minming Ni Zhangdui Zhong David G. Michelson State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China School of Engineering and Informatics University of Sussex UK Department of Electrical and Computer Engineering The University of British Columbia Vancouver Canada

Infrastructure-based cooperation can significantly boost the communication performance of vehicular ad hoc networks, especially when direct transmission of inter-vehicle communication can hardly achieve the stringent requirement of safety information dissemination. In this paper, an analytical model is presented to demonstrate the performance gain of channel capacity for infrastructure-based cooperative transmission. Furthermore, we study the capacity performance for both direct transmission and cooperative communication, under generic path loss model and the measurement-based dual-slope piecewise-linear model, respectively. The analytical results can be used for vehicular networks design and roadside infrastructure deployment in highway scenarios.

关键词： Channel capacity Loss measurement Vehicles Mathematical model Cooperative communication Gain Vehicular ad hoc networks

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