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IEEE International Conference on Automation, Electronics and Electrical engineering (AUTEEE)

作者： Qiang Xu Wei Li Dean Kong Xiang Zhao Xiaoyu Wang Yongji Li Yong Shen Xiangshuo Wang Zheng Zhao State Grid Xinjiang Company Limited Electric Power Research Institute Urumqi China Xinjiang Electric Power Construction and Commissioning Co. Ltd Urumqi China School of Control Engineering and computer North China Electric-Power University Baoding China

ISBN: (数字)9781728150307

ISBN: (纸本)9781728150314

With the increasing proportion of wind energy in the energy structure, the high-precision prediction model has become an indispensable link. An ultra-short-term wind speed forecasting model based on WD-ARIMAX-GARCH is proposed. For some time series, they are often influenced by external factors, and the ARIMA model is only a regression of historical time series, which cannot reflect the influence of external factors. In order to obtain exogenous variables, the wind speed time series is decomposed into several subsequences by introducing wavelet decomposition, and the ARIMA-GARCH model is established for each subsequence. The predicted result is recombined as an exogenous variable and the decomposed data, and an ARIMAX model is established for the new time series. The WD-ARIMAX-GARCH model experiment results show that the prediction accuracy is high.

关键词： Predictive models Wind speed Time series analysis Mathematical model Wind forecasting Data models Forecasting

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SD-Unet: A Structured Dropout U-Net for Retinal Vessel Segmentation

SD-Unet: A Structured Dropout U-Net for Retinal Vessel Segme...

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IEEE Symposium on Bioinformatics and Bioengineering (BIBE)

作者： Changlu Guo Márton Szemenyei Yang Pei Yugen Yi Wei Zhou Department of Control Engineering and Information Technology Budapest University of Technology and Economics Budapest Hungary Budapest University of Technology and Economics Budapest Hungary School of Software Jiangxi Normal University Nanchang China College of Computer Science Shenyang Aerospace University Shenyang China

ISBN: (纸本)9781728146188

At present, artificial visual diagnosis of fundus diseases has low manual reading efficiency and strong subjectivity, which easily causes false and missed detections. Automatic segmentation of retinal blood vessels in fundus images is very effective for early diagnosis of diseases such as the hypertension and diabetes. In this paper, we utilize the U-shaped structure to exploit the local features of the retinal vessels and perform retinal vessel segmentation in an end-to-end manner. Inspired by the recently DropBlock, we propose a new method called Structured Dropout U-Net (SD-Unet), which abandons the traditional dropout for convolutional layers, and applies the structured dropout to regularize U-Net. Compared to the state-of-the-art methods, we demonstrate the superior performance of the proposed approach.

关键词： Image segmentation Biomedical imaging Blood vessels Training Retinal vessels Diseases

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Consensus of mixed-order multi-agent systems with directed topology

Consensus of mixed-order multi-agent systems with directed t...

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Chinese Intelligent Systems Conference, CISC 2017

作者： Geng, Hua Chen, Zengqiang Liu, Zhongxin Zhang, Chunyan Zhang, Qing School of Information Electrical Engineering Hebei University of Engineering Handan056038 China College of Computer and Control Engineering Nankai University Tianjin300071 China Tianjin Key Laboratory of Intelligent Robotics Nankai University Tianjin300071 China College of Science Civil Aviation University of China Tianjin300300 China

ISBN: (纸本)9789811064982

In this paper, an in-depth study about the consensus problem of mixed-order multi-agent system with directed topology is performed. Specifically, this system is composed of two classes of agents respectively described by first-order and second-order dynamics. By the aid of state transformation, two different methods are proposed to solve the consensus. Still, two meaningful examples are provided to verify the effectiveness of the gained theoretical results. This paper is expected to establish a more realistic model and provide effective measures to solve the consensus problem. © 2018, Springer Nature Singapore Pte Ltd.

关键词： Multi agent systems

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On-orbit data mining technology for Earth observation image processing 69

On-orbit data mining technology for Earth observation image ...

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69th International Astronautical Congress: #InvolvingEveryone, IAC 2018

作者： Yu, Mengxi Xiao, Aimin Li, Nan Zhang, Jianquan Dong, Wenbo Yang, Junli Cheng, Mengzhe Key Laboratory of Space Utilization Technology and Engineering Center for Space Utilization Chinese Academy of Sciences Beijing100094 China Beijing University of Posts and Telecommunications Beijing100876 China School of Control and Computer Engineering North China Electric Power University Beijing102206 China

The high resolution earth observation satellite has developed rapidly, and the earth observation system has been developed from single-star mode to many small and medium satellites joint network. Full earth observation in twenty-four hours under all kinds of climate all around the earth has been realized. However, due to the limited bandwidth and energy resources, these data are not appropriate to be completely downloaded, and on-orbit image processing and data mining techniques are required. On one hand, redundant or invalid data can be removed to save limited bandwidth and energy, on the other hand, the on-orbit images are effectively processed in real time, and the intelligence and emergency response capabilities of earth observation system are enhanced. First, a high-performance computing architecture is established, and a high-performance computing platform based on Xilinx Zynq7000 series SoC chip and Nvidia Jetson TX2 series chip is designed to accomplish the on-orbit high-performance image processing with single point computing capacity of 2TFLOPS, storage capacity of 16Tb. Secondly, the image semantic segmentation on the TX2 hardware platform is realized by using the compressed lightweight deep neural network, and the classification of remote sensing image is achieved with accuracy 87% and 1 image per second prediction speed;On the basis of semantic segmentation, the semantic information of forest coverage and the number of houses is extracted. Finally, the image data retrieval technology is used to effectively organize and manage the images, complete the reception and response after receiving the ground commands, and transmit the effective data information to the ground in time. The verification system is further built to verify the rationality, availability and real-time aspects of the image data modeling and data mining platform, which lays the foundation for the future establishment and improvement of earth observation system. The systematic method propo

关键词： Classification (of information)

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Smart Meter Data Analytics for Distribution Network

Smart Meter Data Analytics for Distribution Network

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Chinese control Conference

作者： Guojing Tang Yinghua Han Jinkuan Wang Qiang Zhao School of Computer and Communication Engineering Northeastern University Shenyang China School of Computer and Communication Engineering Northeastern University at Qinhuangdao Qinhuangdao China School of Information Science and Engineering Northeastern University Shenyang China School of Control Engineering Northeastern University at Qinhuangdao Qinhuangdao China

With the rapid development of data analysis technology, the implementation of smart grid construction, the mass installation and use of smart sensing devices, the combination of data analysis technology and smart grid is an inevitable trend. The power data will bring great benefits to power companies. Among them, the topology estimation of distribution network is the cornerstone of smart grid data analysis technology. This paper firstly introduces the voltage deviation analysis of the users on the distribution network, and uses the relationship to conduct a series of topology analysis of the distribution network, such as topology verification, phase identification and topology estimation. The data used in this paper is the actual electricity data of a city, and the result of topology verification is validated through actual investigation.

关键词： Topology Network topology Data analysis Meters Smart meters Estimation Real-time systems

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Consensus for high-order multi-agent systems with communication delay

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Science China(Information Sciences) 2017年第9期60卷 241-252页

作者： Zhenhua WANG Huanshui ZHANG Minyue FU Huaxiang ZHANG School of Information Science and Engineering Shandong Normal University Institute of Data Science and Technology Shandong Normal University School of Control Science and Engineering Shandong University School of Electrical Engineering and Computer Science University of Newcastle School of Automation Guangdong Key Laboratory of Io T Information TechnologyGuangdong University of Technology

In this study, consensus problem for general high-order multi-agent systems with communication delay is investigated. Given the unstable agent dynamics and a known communication delay, two consensus protocols are designed to guarantee consensus over undirected network. By jointly researching the effects of agent dynamics and network topology, allowable delay bounds depending on the maxima of concave functions are easy to calculate. Especially, the maximum delay bound is derived when the network topology is completely connected. The main approach for the same involves designing the control gains on the basis of the solution of a parametric algebraic Riccati equation. Finally, the theoretical results are demonstrated via numerical simulations.

关键词： consensus communication delay historical input information parametric algebraic Riccati equa tion eigenratio

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Efficient AUV Path Planning in Time-Variant Underwater Environment Using Differential Evolution Algorithm

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Journal of Marine Science and Application 2018年第4期17卷 585-591页

作者： S.Mahmoud Zadeh D.M.W Powers A.M.Yazdani K.Sammut A.Atyabi School of Computer Science Engineering and Mathematics Flinders University Tonsley Centre for Maritime Engineering Control and Imaging Flinders University Seattle Children's Research Institute University of Washington

Robust and efficient AUV path planning is a key element for persistence AUV maneuvering in variable underwater environments. To develop such a path planning system, in this study, differential evolution(DE) algorithm is employed. The performance of the DE-based planner in generating time-efficient paths to direct the AUV from its initial conditions to the target of interest is investigated within a complexed 3D underwater environment incorporated with turbulent current vector fields, coastal area,islands, and static/dynamic obstacles. The results of simulations indicate the inherent efficiency of the DE-based path planner as it is capable of extracting feasible areas of a real map to determine the allowed spaces for the vehicle deployment while coping undesired current disturbances, exploiting desirable currents, and avoiding collision boundaries in directing the vehicle to its destination. The results are implementable for a realistic scenario and on-board real AUV as the DE planner satisfies all vehicular and environmental constraints while minimizing the travel time/distance, in a computationally efficient manner.

关键词： Path planning Differential evolution Autonomous underwater vehicles Evolutionary algorithms Obstacle avoidance

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Polynomial Observer for Interval Positive Polynomial Systems

Polynomial Observer for Interval Positive Polynomial Systems

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International Conference on Systems and control (ICSC)

作者： Imen Iben Ammar Hamdi Gassara Ahmed El Hajjaji Fernando Tadeo Mohamed Chaabane National School of Engineers Sfax Laboratory of Sciences and Techniques of Automatic control & computer engineering ENIS PB 1173 Sfax Tunisia Modeling Information and Systems (MIS) Laboratory 33 Rue St Leu Amiens University of Picardie Jules Verne France Department of Systems Engineering and Automatic University of Valladolid Valladolid Spain

This paper is concerned with the design of polynomial observers for positive polynomial interval systems. In order to design the polynomial observer a solution based on Sum Of Squares (SOS) programming is provided. The design conditions are presented in terms of SOS, which can be numerically and symbolically solved via SOSTOOLS and a Semi-Definite Program (SDP) solver. Finally, numerical examples are given to show the feasibility of the proposed approaches.

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Consensus of a class of nonlinear fractional-order multi-agent systems via dynamic output feedback controller

arXiv

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arXiv 2018年

作者： Zavvari, Elyar Badri, Pouya Sojoodi, Mahdi Advanced Control Systems Laboratory School of Electrical and Computer Engineering Tarbiat Modares University Tehran Iran

This paper addresses the consensus of a class of nonlinear fractional-order multi-agent systems (FOMAS) with positive real uncertainty. First a fractional non-fragile dynamic output feedback controller is put forward via the output measurements of neighboring agents, then appropriate state transformation reduced the consensus problem to a stability one. A sufficient condition based on direct Lyapunov approach, for the robust asymptotic stability of the transformed system and subsequently for the consensus of the main system is presented. Additionally, utilizing S-procedure and Schur complement, the systematic stabilization design algorithm is proposed for fractional-order system with and without nonlinear terms. The results are formulated as an optimization problem with linear matrix inequality constraints. Simulation results are given to verify the effectiveness of the theoretical results. Copyright © 2018, The Authors. All rights reserved.

关键词： Linear matrix inequalities

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Stabilizing a Rotary Inverted Pendulum Based on Lyapunov Stability Theorem 29

Stabilizing a Rotary Inverted Pendulum Based on Lyapunov Sta...

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第29届中国控制与决策会议

作者： Jie Wen Yuanhao Shi Xiaonong Lu School of Computer Science and Control Engineering North University of China School of Management Hefei University of Technology

ISBN: (纸本)9781509046584

The stabilization of Rotary Inverted Pendulum based on Lyapunov stability theorem is investigated in this *** key of designing controls by Lyapunov method is the construction of Lyapunov function.A logarithmic function is constructed as the Lyapunov function and is compared with the usual quadratic function *** comparative results show that the constructed logarithmic function has higher numerical accuracy and convergence speed than the usual quadratic *** this basis,the control of stabilizing rotary inverted pendulum is designed based on the constructed logarithmic function by Lyapunov *** effectiveness of the designed control is verified by experiments,and is compared with the control designed based on quadratic function.

关键词： Rotary Inverted Pendulum Lyapunov stability theorem stabilizing control logarithmic function state feedback control

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