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Fault estimation based on high order iterative learning scheme for systems subject to nonlinear uncertainties

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Science China(Information Sciences) 2022年第7期65卷 261-262页

作者： Li FENG Shuiqing XU Ke ZHANG yi chai Darong HUANG College of Traffic and Transportation Chongqing Jiaotong University College of Electrical Engineering and Automation Hefei University of Technology College of Automation Chongqing University

Dear editor, Due to the high load and continuous work, some equipment such as sensors and actuators in the system will inevitably degrade as the aging time increases. Also, they may evolve into faults causing the decline of system control performance. However, the stability of the system cannot be guaranteed due to the large loss of property and casualties caused by faults. Therefore, fault diagnosis and faulttolerant control [1, 2] are widely applied in the industrial system to solve these problems.

关键词： Fault estimation High order iterative learning scheme Nonlinear system Nonlinear uncertainties Iterative learning control

First attempt of barrier functions for Caputo's fractional-order nonlinear dynamical systems

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Science China(Information Sciences) 2023年第7期66卷 313-314页

作者： Zheren ZHU Pengfei HUANG Xinmin ZHANG yi chai Zhihuan SONG College of Control Science and Engineering Zhejiang University State Key Laboratory of Industrial Control Technology School of Automation Chongqing University Key Laboratory of Complex System Safety and Control(Chongqing University) Ministry of Education

Dear editor, In the past two decades, scholars have begun to use system dynamical models and state motions to study the safety of a system to realize the analysis, diagnosis, and control of system safety. This safety ...

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A new current sensor incipient fault diagnosis method for converters in wind energy conversion systems

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Science China(Information Sciences) 2022年第5期65卷 276-277页

作者： Songbing TAO Youqiang HU Shuiqing XU yi chai Ke ZHANG College of Automation Chongqing University College of Electrical Engineering and Automation Hefei University of Technology

Dear editor,The efficient and clean characteristics of wind energy have led to the development of wind power generation as one of the most sophisticated ways of power generation [1]. To guarantee the reliability and safety of the energy conversion process, current sensors have played a significant role in the wind energy conversion systems (WECSs). However, to the best of the author’s knowledge, the literature concerning current sensor fault diagnosis is limited.

关键词： Incipient fault Current sensor Fault diagnosis Wind power Instantaneous amplitude Fault location

考虑绿证-碳交易的多虚拟电厂混合博弈优化调度

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智慧电力 2024年第3期52卷 1-7,16页

作者：徐慧慧田云飞赵宇洋柴宜方茜梁宁国网甘肃省电力公司经济技术研究院甘肃兰州730050 昆明理工大学电力工程学院云南昆明650500

为分析多个虚拟电厂间协同管理经济效益及低碳效益问题,提出了一种考虑绿证-碳交易的多虚拟电厂混合博弈优化调度方法。首先,建立混合博弈优化框架,分析电网运营商和虚拟电厂联盟间博弈关系。然后,构建以电网运营商为领导者、虚拟电厂... 详细信息

为分析多个虚拟电厂间协同管理经济效益及低碳效益问题,提出了一种考虑绿证-碳交易的多虚拟电厂混合博弈优化调度方法。首先,建立混合博弈优化框架,分析电网运营商和虚拟电厂联盟间博弈关系。然后,构建以电网运营商为领导者、虚拟电厂为跟随者的混合博弈优化模型,并基于纳什谈判理论,将虚拟电厂成本最小化等效为联盟效益最大化和合作收益分配2个子问题。最后,将二分法和交替方向乘子法相结合求解混合博弈模型。算例分析表明所提模型能够降低虚拟电厂联盟的总成本及碳排放量,协调联盟间的运行,提升联盟经济性及低碳性,实现了联盟成员合作收益公平分配。

关键词：混合博弈纳什谈判点对点交易虚拟电厂优化调度

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Combined data mining techniques based patient data outlier detection for healthcare safety

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International Journal of Intelligent Computing and Cybernetics 2016年第1期9卷 42-68页

作者： Gebeyehu Belay Gebremeskel chai yi Zhongshi He Dawit Haile State Key Laboratory of Power Transmission Equipment System Security and New TechnologyCollege of AutomationChongqing UniversityChongqingChina College of Computer Science Chongqing UniversityChongqingChina School of Engineering Science and TechnologyVirginia State UniversityPetersburgVirginiaUSA

Purpose–Among the growing number of data mining(DM)techniques,outlier detection has gained importance in many applications and also attracted much attention in recent *** the past,outlier detection researched papers appeared in a safety care that can view as searching for the needles in the ***,outliers are not always ***,the purpose of this paper is to investigate the role of outliers in healthcare services in general and patient safety care,in ***/methodology/approach–It is a combined DM(clustering and the nearest neighbor)technique for outliers’detection,which provides a clear understanding and meaningful insights to visualize the data behaviors for healthcare *** outcomes or the knowledge implicit is vitally essential to a proper clinicaldecision-making *** method isimportant to thesemantic,andthe novel tactic of patients’events and situations prove that play a significant role in the process of patient care safety and ***–The outcomes of the paper is discussing a novel and integrated methodology,which can be inferring for different biological data *** is discussed as integrated DM techniques to optimize its performancein the field of health and *** is an integrated method of outliers detection that can be extending for searching valuable information and knowledge implicit based on selected patient *** on these facts,outliers are detected as clusters and point events,and novel ideas proposed to empower clinical services in consideration of customers’*** is also essential to be a baseline for further healthcare strategic development and research *** limitations/implications–This paper mainly focussed on outliers *** isolation that are essential to investigate the reason how it happened and communications how to mitigate it did not ***,the research can be extended more about the hierarchy of patient prob

关键词： Data mining Clustering Healthcare Mining algorithm Nearest neighbor Outlier detection

Larva fish assemblage structure in three-dimensional floating wetlands and non-floating wetlands in the Changjiang River estuary

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Journal of Oceanology and Limnology 2021年第2期39卷 721-731页

作者： Xiaofeng HUANG Feng ZHAO Chao SONG yi chai Qian WANG Ping ZHUANG College of Animal Science Yangtze UniversityJingzhou 434025China Engineering Research Center of Ecology and Agricultural Use of Wetland Ministry of EducationYangtze UniversityJingzhou 434020China Chinese Academy of Fishery Sciences East China Sea Fisheries Research InstituteShanghai 200090China

Fish populations have declined in many estuarine and freshwater ecosystems in part due to the loss of habitat in recent *** lost habitat for larvae fish is a potential method for recovering larvae fish ***-dimensional artificial floating wetlands(AFWs)on which Phragmites australis was planted were experimentally deployed to recover the lost habitat in the Changjiang(Yangtze)River estuary from May to July *** AFW area was characterized by slow velocity,high transparency,low dissolved oxygen,and relatively constant water *** total individuals of larvae fish in the AFW area(12122 in total)was higher than that in the non-AFW area(1250 in total),and the densities of most larvae fish species were higher in the AFW habitat than in the non-AFW *** distributions of larvae fish species were positively influenced by habitat type because they were strongly related to the negative part of the first axis of the redundancy analysis,and Cyprinus carpio and Cyprinus auratus were inclined to habitat in the slow velocity and high transparency AFW habitat *** results indicate that larvae fish species are inclined to inhabit the AFW *** use of three-dimensional *** AFWs would be a potential method for enhancing the habitat of larvae fish in the degraded habitats along the estuary.

关键词： habitat rehabilitation larvae fish biodiversity conservation artificial floating wetland Changjiang(Yangtze)River estuary

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Sift-based Camera Tamper Detection For Video Surveillance 25th

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Sift-based Camera Tamper Detection For Video Surveillance

基于阶梯绿证与源荷双重响应的HIES优化调度模型

第25届中国控制与决策会议

作者： Hongpeng yin Xuguo Jiao Xianke Luo chai yi College of Automation Chongqing University State Key Laboratory of Power Transmission Equipment & System Security and New Technology(College of Autotion Chongqing University)

ISBN: (纸本)9781467355339

Keeping the camera long time proper functioning without tamper is the fundamentally requirement of a video surveillance system. Traditional camera tamper detection is applied by surveillance system operators. It’s large human resource consuming and inefficiency. In this paper, a SIFT-based automatic camera tamper detection algorithm for video surveillance is proposed. When camera tamper occurred, the real-time frame will be large changed. Therefore, a Sift feature based decision function is employed to detect camera tamper. The threshold is carefully chosen to reduce false alarms. Several experiments are conducted to demonstrate the effectiveness and robust of the proposed method.

关键词： video surveillance camera tamper SIFT algorithm covered camera detection moved camera detection

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智慧电力 2024年第8期52卷 57-63,136页

作者：徐慧慧柴宜赵宇洋田云飞卢佳富梁宁国网甘肃经济技术研究院甘肃兰州730050 昆明理工大学电力工程学院云南昆明650500

含氢综合能源系统(HIES)是未来能源体系的重要发展方向。为进一步提升HIES的低碳性及经济性,建立基于阶梯绿证与源荷双重响应的HIES优化调度模型。首先,借鉴阶梯碳交易机制(CTM)的作用机理,引入补偿因子和惩罚因子设计阶梯绿证交易机制... 详细信息

含氢综合能源系统(HIES)是未来能源体系的重要发展方向。为进一步提升HIES的低碳性及经济性,建立基于阶梯绿证与源荷双重响应的HIES优化调度模型。首先,借鉴阶梯碳交易机制(CTM)的作用机理,引入补偿因子和惩罚因子设计阶梯绿证交易机制;其次,在传统需求响应的基础上建立源荷双重响应模型,实现供需两侧灵活响应;最后,以总成本最小为优化目标建立HIES优化调度模型。案例分析表明,所提模型在提高HIES运行经济性的同时可降低碳排放。

关键词：阶梯绿证交易机制源荷双重响应 HIES 优化调度 CCS-P2G

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The input pattern problem on deep learning applied to signal analysis and processing to achieve fault diagnosis

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Science China(Information Sciences) 2019年第12期62卷 269-271页

作者： Hao REN Nan LI yi chai Jianfeng QU Qiu TANG Lei HUANG School of Automation Chongqing University Key Laboratory of Complex System Safety and Control Ministry of Education School of Computer Science and Technology Huaiyin Normal University

Dear editor,Generally, one of the most prominent features of modern industrial systems is the massive amount of data collected from various sensors, which poses great challenges to traditional methods of captur-

关键词： The input pattern problem on deep learning applied to signal analysis and processing to achieve fault diagnosis