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Design and analysis of active disturbance rejection control for time-delay systems using frequency-sweeping

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Journal of Systems Engineering and Electronics 2023年第2期34卷 479-491页

作者： WANG Yongshuai CHEN Zengqiang sun mingwei sun Qinglin College of Artificial Intelligence Nankai UniversityTianjin 300350China Key Laboratory of Intelligent Robotics of Tianjin Tianjin 300350China

For the typical first-order systems with time-delay,this paper explors the control capability of linear active disturbance rejection control(LADRC).Firstly,the critical time-delay of LADRC is analyzed using the frequency-sweeping method and the Routh criterion,and the stable time-delay interval starting from zero is accurately obtained,which reveals the limitations of general LADRC on large *** in view of the large time-delay,an LADRC controller is developed and verified to be effective,along with the robustness ***,numerical simulations show the accuracy of critical time-delay,and demonstrate the effectiveness and robustness of the proposed controller compared with other modified LADRCs.

关键词： active disturbance rejection control frequencysweeping method critical time-delay Routh criterion system with large time-delay

Reinforcement learning based parameter optimization of active disturbance rejection control for autonomous underwater vehicle

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Journal of Systems Engineering and Electronics 2022年第1期33卷 170-179页

作者： SONG Wanping CHEN Zengqiang sun mingwei sun Qinglin College of Artificial Intelligence Nankai UniversityTianjin 300350China Key Laboratory of Intelligent Robotics of Tianjin Nankai UniversityTianjin 300350China

This paper proposes a liner active disturbance rejection control(LADRC) method based on the Q-Learning algorithm of reinforcement learning(RL) to control the six-degree-of-freedom motion of an autonomous underwater vehicle(AUV).The number of controllers is increased to realize AUV motion *** the same time, in order to avoid the oversize of the algorithm, combined with the controlled content, a simplified Q-learning algorithm is constructed to realize the parameter adaptation of the LADRC ***, through the simulation experiment of the controller with fixed parameters and the controller based on the Q-learning algorithm, the rationality of the simplified algorithm, the effectiveness of parameter adaptation, and the unique advantages of the LADRC controller are verified.

关键词： autonomous underwater vehicle(AUV) reinforcement learning(RL) Q-learning linear active disturbance rejection control(LADRC) motion decoupling parameter optimization

Active disturbance rejection control on first-order plant

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Journal of Systems Engineering and Electronics 2011年第1期22卷 95-102页

作者： Ruiguang Yang mingwei sun Zengqiang Chen College of Information Technical Science Nankai University Tianjin 300071 P. R. China

Conventional PI control encounters some problems when dealing with large lag process in the presence of parameter *** the typical first-order process,an observerbased linear active disturbance rejection control（LADRC） scheme is presented to cope with the difficulties,and a reduced-order observer scheme is proposed *** quantitative dynamic results with regard to non-overshoot characteristics are ***,the performance boundaries of LADRC and PI control are explicitly compared with each other,which shows that the former is more superior in most cases.

关键词： active disturbance rejection control(ADRC) first-order process dynamic performance non-overshoot.

Proportion integral-type active disturbance rejection generalized predictive control for distillation process based on grey wolf optimization parameter tuning

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Chinese Journal of Chemical Engineering 2022年第9期35卷 234-244页

作者： Jia Ren Zengqiang Chen mingwei sun Qinglin sun Zenghui Wang College of Artificial Intelligence Nankai UniversityTianjin 300350China Key Lab of Intelligent Robotics of Tianjin Tianjin 300350China Department of Electrical and Mining Engineering University of South AfricaFlorida 1710South Africa

The high-purity distillation column system is strongly nonlinear and coupled,which makes it difficult to *** disturbance rejection control(ADRC)has been widely used in distillation systems,but it has limitations in controlling distillation systems with large time delays since ADRC employs ESO and feedback control law to estimate the total disturbance of the system without considering the large time *** paper designs a proportion integral-type active disturbance rejection generalized predictive control(PI-ADRGPC)algorithm to control the distillation column system with large time *** replaces the PD controller in ADRC with a proportion integral-type generalized predictive control(PI-GPC),thereby improving the performance of control systems with large time *** the proposed controller has many parameters and is difficult to tune,this paper proposes to use the grey wolf optimization(GWO)to tune these parameters,whose structure can also be used by other intelligent optimization *** performance of GWO tuned PI-ADRGPC is compared with the control performance of GWO tuned ADRC method,multi-verse optimizer(MVO)tuned PI-ADRGPC and MVO tuned *** simulation results show that the proposed strategy can track reference well and has a good disturbance rejection performance.

关键词： Proportion integral-type active disturbance rejection generalized predictive control Grey wolf optimization Parameter tuning Distillation Process control Prediction

Camera Calibration from Profile of Revolution

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Geo-Spatial Information Science 2006年第1期9卷 38-44页

作者： ZHENG Shunyi YANG Ling sun mingwei School of Remote Sensing and Information Engineering Wuhan University 129 Luoyu Road Wuhan 430079 China

This paper focuses on the problem of calibrating a pinhole camera from images of profile of a revolution. In this paper, the symmet ry of images of profiles of revolution has been extensively exploited and a prac tical and accurate technique of camera calibration from profiles alone has been developed. Compared with traditional techniques for camera calibration, for inst ance, it may involve taking images of some precisely machined calibration patter n (such as a calibration grid), or edge detection for determining vanish points which are often far from images center or even do not physically exist, or calcu lation of fundamental matrix and Kruppa equations which can be numerically unsta ble, the method presented here uses just profiles of revolution, which are commo nly found in daily life (e.g. bowls and vases), to make the process easier as a result of the reduced cost and increased accessibility of the calibration object s. This paper firstly analyzes the relationship between the symmetry property of profile of revolution and the intrinsic parameters of a camera, and then shows how to use images of profile of revolution to provide enough information for det ermining intrinsic parameters. During the process, high-accurate profile extrac tion algorithm has also been used. Finally, results from real data are presented , demonstrating the efficiency and accuracy of the proposed methods.

关键词： camera calibration profile of revolution harmonic homology symmetry

The Spectrum and Age-Sex Patterns Among Outpatients with Allergic Diseases—Yichang City,Hubei Province,China,2018–2021

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China CDC weekly 2023年第31期5卷 681-686,I0001页

作者： Jinyi Wang mingwei sun Guoxing Li Dapeng Yin Chi Hu Jinfang sun Jiangsu Taizhou People’s Hospital Taizhou CityJiangsu ProvinceChina Office of Epidemiology Chinese Center for Disease Control and PreventionBeijingChina Department of Occupational and Environmental Health Sciences Peking University School of Public HealthBeijingChina Hainan Center for Disease Control and Prevention Haikou CityHainan ProvinceChina Yichang Center for Disease Control and Prevention Yichang CityHubei ProvinceChina.

What is already known about this topic?Allergic diseases have affected an estimated 40%of the population in ***,our understanding of the full spectrum of these diseases remains *** is added by this report?Between 2018 and 2021,Yichang City documented 625,929 outpatient visits mainly related to skin and mucous membrane allergies(77.90%)and allergic respiratory conditions(19.64%).In 2021,the occurrence of outpatient visits for conditions such as allergic rhinitis,acute atopic conjunctivitis,and atopic dermatitis *** demographic analysis revealed that male patients comprised the majority of the under 18 age bracket(56.05%),while female patients were predominantly represented in the 18 to 65 age bracket(61.79%).What are the implications for public health practice?This constitutes the first analysis of the spectrum of allergic diseases,utilizing regional outpatient data,which has substantial implications for understanding the disease burden.

关键词： utilizing analysis Hubei

What job can a bug give?A controversy over the arsenic-guzzling bacterium cultured by NASA

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Protein & Cell 2011年第4期2卷 261-263页

作者： mingwei sun Christopher J.Vavricka Baoli Zhu CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of Sciences(CASPMI)Beijing 100101China College of Life Sciences University of Science and Technology of ChinaHefei 230027China

The mysteries of life’s evolution on our planet drive us to explore the limits of *** forms on Earth as we know are composed of six essential elements:carbon,hydrogen,oxygen,nitrogen,sulfur and ***,a recently published research work funded by the National Aeronautics and Space Administration(NASA),USA,has almost shaken the fundamental knowledge about what is life made of on *** research team led by NASA astrobiologist Felisa Wolfe-Simon described a microbe isolated from California’s Mono Lake that could sustain its growth by using toxic chemical arsenic(As)instead of phosphorus(P).This surprising discovery was published online by Science Express on December 2 last year(Wolfe-Simon et al.,2010,online).If the authors of the paper were right,we would have to expand our definition of life on this *** arsenic-bug they grew was dubbed GFAJ-1,which interestingly stands for“Give Felisa A Job.”

关键词： bug planet Express

Progress in crystallization of major histocompatibility complex class I in vertebrates

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Chinese Science Bulletin 2014年第12期59卷 1308-1316页

作者： Lei Feng mingwei sun Songpeng Dong Feng-Shan Gao Molecular Immunology Laboratory College of Life Science and Technology Dalian University Key Laboratory of Pathogenic Microbiology and Immunology Institute of Microbiology Chinese Academy of Sciences School of Life Sciences University of Science and Technology of China

The major histocompatibility complex(MHC)of proteins that exists in all vertebrates is encoded by a cluster of genes associated with the immune response and related *** is divided into MHC I,II,and III;MHC I is involved in antigenic presentation,binding T cell receptors,and leading ultimately to specific cellular immune *** complicated functions of MHC I are determined by the nature of the *** crystal structure of MHC I has been solved for many animals,revealing the relationship between spatial structure and *** I consists of an a heavy chain and a b2m light chain,both ligated non-covalently to a complex when a peptide is bound to the antigenic-binding *** a heavy chain is divided into an extracellular domain,a transmembrane domain,and an intracellular *** extracellular domain consists of sub-regions a1,a2,and *** a1 and a2 together form the antigenic-binding groove and bind antigenic peptides with 8–10 amino acid *** I can form a stable spatial structure;however,it should be noted that there are differences in the structure of MHC I among animal species,including anchored amino acids in binding peptides,binding sites,molecular distance,crystallization conditions,***,progress in determination of the crystal structure of human,mouse,chicken,non-human primate,and swine MHC I is described in detail.

关键词：主要组织相容性复合体脊椎动物结晶条件主要组织相容性复合物胞外结构域氨基酸残基空间结构细胞免疫应答

SRAFE:Siamese Regression Aesthetic Fusion Evaluation for Chinese Calligraphic Copy

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CAAI Transactions on Intelligence Technology 2023年第3期8卷 1077-1086页

作者： mingwei sun Xinyu Gong Haitao Nie Muhammad Minhas Iqbal Bin Xie Central South University ChangshaChina Hunan Xiangjiang Artificial Intelligence Academy ChangshaChina University of Okara OkaraPakistan

Evaluation of calligraphic copy is the core of Chinese calligraphy appreciation and ***,previous aesthetic evaluation studies often focussed on photos and paintings,with few attempts on Chinese *** solve this problem,a Siamese regression aesthetic fusion method is proposed,named SRAFE,for Chinese calligraphy based on the combination of calligraphy aesthetics and deep ***,a dataset termed Evaluated Chinese Calligraphy Copies(E3C)is constructed for aesthetic ***,12 hand‐crafted aesthetic features based on the shape,structure,and stroke of calligraphy are ***,the Siamese regression network(SRN)is designed to extract the deep aesthetic representation of ***,the SRAFE method is built by fusing the deep aesthetic features with the hand‐crafted aesthetic *** results show that scores given by SRAFE are similar to the aesthetic evaluation label of E3C,proving the effectiveness of the authors’method.

关键词： calligraphy evaluation hand‐crafted aesthetic features siamese regression network