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第29届中国控制与决策会议

作者： Lou Yang Mandan Liu Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of EducationEast China University of Science and Technology East China University of Science and Technology

ISBN: (纸本)9781509046584

In this paper for on-line signature verification,wavelet packet analysis will be used to extract dynamic local features,combining global features to keep distortionless in signature *** importantly,in order to overcome shortcomings that the traditional expectation maximization algorithm seriously depends on parameters initialization and easily falls into local optimum when used to train Gaussian Mixture Models,we first employ an improved Splitting-EM algorithm based on Bayesian Ying-Yang learning system to train Gaussian Mixture ***-EM algorithm can search for optimal number of Gaussian components so that a unique,user-dependent signature model can be established to ensure a better *** show that the verification accuracy based on wavelet packet analysis to extract features and Splitting-EM algorithm training Gaussian Mixture Models reaches 95.8%,which is a satisfactory verification result.

关键词： On-line Signature Verification Gaussian Mixture Models Splitting-EM Algorithm Bayesian Ying-Yang Learning System

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control Performance Assessment of Multivariable System Based on Multi-time-variant-disturbances Mixing GMV Method 29

Control Performance Assessment of Multivariable System Based...

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第29届中国控制与决策会议

作者： Yupeng Du Zhenlei Wang Xin Wang Key Laboratory of Advanced Control and Optimization for Chemical Processes East China University of Science and Technology Center of Electrical & Electronic Technology Shanghai Jiao Tong University

ISBN: (纸本)9781509046584

The disturbance in chemical process is complex and has the multiple characteristics,and the control performance assessment of multivariable system with multiple disturbances is one of the hot *** this paper,the control performance assessment method of multivariable systems,based on multi-time-variant-disturbances mixing generalized minimum variance(MMGMV),is ***,the generalized minimum variance control is introduced into the multivariable system performance assessment,and the weight matrix is designed according to the time-varying control ***,the multivariable MMGMV controller is designed combining with the idea of multi-model weights mixing for all multi-time-varying ***,the output variance of each controlled variable is obtained using MMGMV *** average variance of controlled variable in the MMGMV controller acts as the criterion of performance assessment,and combining with the output variance of actual controller for the controller performance *** with the minimum variance benchmark,the developed method is more reasonable and practical for the control performance assessment of multivariable *** developed approach is demonstrated by a numerical simulation and a heavy oil fractionation of process control system.

关键词： Multivariable Multi-time-variant-disturbance-mixing Generalized minimum variance Time-varying weight matrix Mixing weight

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A class of nonlinear discrete-time system adaptive control based on second level multiple models 36

A class of nonlinear discrete-time system adaptive control b...

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第36届中国控制会议

作者： Yong Chen Xin Wang Zhenlei Wang Key Laboratory of Advanced Control and Optimization for Chemical Processes East China University of Science and Technology Center of Electrical and Electronic Technology Shanghai Jiao Tong University

ISBN: (纸本)9781538629185

Using multiple models to deal with transients for adaptive systems which is large parametric uncertainties was introduced in the 1990 *** common method is using switching ***,these methods has some potential *** this paper,a new multiple models scheme is proposed for a class strict-feedback nonlinear discrete-time ***,we use feedback linearization and backstepping method to develop adaptive indirect schemes with an observer-based identifier to ***,we design a controller based on the convex hull of parameter *** the number of necessary models is less than switching scheme,and can use the information of all identification ***,simulation have demonstrated that this method is effectively to a class of strict-feedback nonlinear discrete-time system.

关键词： convex hull multiple models backstepping nonlinear system strict-feedback

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Second Level Adaptive control Based on Combination Multiple Model 29

Second Level Adaptive Control Based on Combination Multiple ...

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第29届中国控制与决策会议

ISBN: (纸本)9781509046584

Since all of adaptive models converge to the same point in parameter space,classical second level multiple model adaptive control method cannot deal with linear time-varying *** order to deal with this drawback,this paper proposes a modified second level adaptive control method based on combining the advantages of adaptive model and fixed model for a class linear discrete time-varying plant where only a little prior information which is ***,multiple adaptive models are selected in the space of parameters,and the parameters are identifying and the controller is designed based on second level adaptive ***,when one of sub-model of the adaptive models are closed to the real parameters of the system,all of these adaptive models are fixed,and then the controller is designed based on multiple fixed ***,simulations have demonstrated that this method is effectively to a class of linear time-varying system.

关键词： adaptive model fixed model second level adaptive control multi-model

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Nitrogen-bridged Fe-Cu Atomic Pair Sites for Efficient Electrochemical Ammonia Production and Electricity Generation with Zn-NO2Batteries

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Angewandte Chemie 2023年第2期136卷

作者： Zenghui Bi Jiao Hu Ming Xu Hua Zhang Yingtang Zhou Guangzhi Hu School of Materials and Energy School of Ecology and Environmental Science Yunnan University Kunming 650504 China Contribution: Conceptualization (lead) Investigation (lead) Methodology (equal) Writing - original draft (lead) Contribution: Conceptualization (supporting) Investigation (equal) Writing - original draft (equal) State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China Contribution: Formal analysis (supporting) Investigation (equal) Writing - original draft (equal) Contribution: Conceptualization (supporting) Project administration (equal) Validation (lead) Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control National Engineering Research Center for Marine Aquaculture Marine Science and Technology College Zhejiang Ocean University Zhoushan 316022 China Contribution: Conceptualization (equal) Software (lead) Writing - review & editing (equal) Contribution: Funding acquisition (lead) Supervision (lead) Writing - review & editing (lead)

The development of environmentally sustainable and highly efficient technologies for ammonia production is crucial for the future advancement of carbon-neutral energy systems. The nitrite reduction reaction (NO 2 RR) for generating NH 3 is a promising alternative to the low-efficiency nitrogen reduction reaction (NRR), owing to the low N=O bond energy and high solubility of nitrite. In this study, we designed a highly efficient dual-atom catalyst with Fe-Cu atomic pair sites (termed FeCu DAC), and the as-developed FeCu DAC was able to afford a remarkable NH 3 yield of 24,526 μg h −1 mg cat. −1 at −0.6 V, with a Faradaic Efficiency (FE) for NH 3 production of 99.88 %. The FeCu DAC also exhibited exceptional catalytic activity and selectivity in a Zn-NO 2 battery, achieving a record-breaking power density of 23.6 mW cm −2 and maximum NH 3 FE of 92.23 % at 20 mA cm −2 . Theoretical simulation demonstrated that the incorporation of the Cu atom changed the energy of the Fe 3d orbital and lowered the energy barrier, thereby accelerating the NO 2 RR. This study not only demonstrates the potential of galvanic nitrite-based cells for expanding the field of Zn-based batteries, but also provides fundamental interpretation for the synergistic effect in highly dispersed dual-atom catalysts.

关键词： Ammonia Production Dual-Atom Catalyst Nitrite Reduction Reaction Zn-Based Battery

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Microbial electrochemistry for bioremediation

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Environmental Science and Ecotechnology 2020年第1期1卷 85-91页

作者： Xiaofei Wang Federico Aulenta Sebastia Puig Abraham Esteve-Nunez Yujie He Yang Mu Korneel Rabaey Center for Microbial Ecology and Technology(CMET) Ghent UniversityCoupure Links 6539000GhentBelgium Centre for Advanced Process Technology for Urban Resource Recovery(CAPTURE) Ghent UniversityBelgium Water Research Institute(IRSA) National Research Council(CNR)Via Salaria Km 2930000015MonterotondoRMItaly LEQUiA.Institute of the Environment University of GironaCampus Montilivi.C/Maria Aurelia Capmany69E-17003GironaCataloniaSpain Department of Analytical Chemistry and Chemical Engineering University of AlcalaCampus UniversitarioCtra.Madrid-Barcelona Km 33.60028871Alcala de HenaresSpain State Key Laboratory of Pollution Control and Resource Reuse(SKL-PCRR) School of the EnvironmentNanjing UniversityXianlin Avenue 163Nanjing210023China Department of Applied Chemistry School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefeiAnhui230026China

Lack of suitable electron donors or acceptors is in many cases the key reason for pollutants to persist in the *** supplementation of electron donors or acceptors is often difficult to control and/or involves chemical additions with limited lifespan,residue formation or other adverse side *** electrochemistry has evolved very fast in the past years–this field relates to the study of electrochemical interactions between microorganisms and solid-state electron donors or *** can be supplied in such so-called bioelectrochemical systems(BESs)at low voltage to provide or extract electrons in a very precise manner.A plethora of metabolisms can be linked to electrical current now,from metals reductions to denitrification and *** this perspective,we provide an overview of the emerging applications of BES and derived technologies towards the bioremediation field and outline how this approach can be game changing.

关键词： electrochemistry precise residue

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A Competitive Swarm Optimizer Integrated with Cauchy and Gaussian Mutation for Large Scale optimization 36

A Competitive Swarm Optimizer Integrated with Cauchy and Gau...

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第36届中国控制会议

作者： Qiang Zhang Hui Cheng Zhencheng Ye Zhenlei Wang Key Laboratory of Advance Control and optimization for Chemical Processes Ministry of EducationEast China University of Science and Technology

ISBN: (纸本)9781538629185

Competitive swarm optimizer（CSO） has shown promising results for solving large scale global optimization problems proposed ***,CSO shows insufficient exploitation of the *** this paper,a competitive swarm optimizer integrated with Cauchy and Gaussian mutation（CGCSO） is proposed for large scale *** new algorithm does not only update the losers’ positions with the CSO method,but also update the winners’ positions by Cauchy and Gaussian mutation to improve the exploitation capability of the ***,CGCSO utilizes the ring topology to enhance the swarm diversity and alleviate premature convergence.A comparative study between CGCSO and CSO evaluated on the CEC’08 benchmark functions has been carried *** experimental results indicate that CGCSO performs better on the whole,especially on the non-separable functions and 500-dimensional problems.

关键词： Competitive Swarm Optimizer Cauchy Mutation Neighborhood Topology Particle Swarm optimization Large Scale optimization

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Adaptive Neural Output Feedback control for Nonstrict-Feedback Nonlinear Systems with Quantized Input 36

Adaptive Neural Output Feedback Control for Nonstrict-Feedba...

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第36届中国控制会议

作者： Yan Dong Zhaoxu Yu Fangfei Li Key Laboratory of Advanced Control and Optimization for Chemical Process of Ministry of Education East China University of Science and Technology Department of Mathematics East China University of Science and Technology

ISBN: (纸本)9781538629185

This paper focuses on the problem of adaptive output feedback tracking control for a class of nonstrict-feedback nonlinear systems with unknown control coefficients and quantized input. The difficulty from the unknown control direction is solved by using the linear state transformation and the Nussbaum gain function（NGF） approach. Based on the combination of input-driven observer, backstepping technique, neural network（NN） parametrization and variable separation method, a novel adaptive output feedback quantized control scheme involving only one adaptive parameter is developed for such systems. The designed quantized controller ensures that all signals of closed-loop systems are semi-globally uniformly ultimately bounded（SGUUB）, and the tracking error converges to an adjustable neighborhood of the origin. Finally, a numerical example is provided to demonstrate the effectiveness of the proposed control design.

关键词： Nonstrict-feedback systems quantized input signal output feedback adaptive control unknown control direction

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Effect of Li content on microstructure and mechanical property of Mg-xLi-3(Al-Si) alloys

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Transactions of Nonferrous Metals Society of China 2019年第12期29卷 2506-2513页

作者： Cheng ZHANG Liang WU Zi-long ZHAO Zhi-hui XIE Guang-sheng HUANG Lei LIU Bin JIANG Andrej ATRENS Fu-sheng PAN State Key Laboratory of Mechanical Transmission College of Materials Science and EngineeringChongqing UniversityChongqing 400044China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China College of Civil Engineering Chongqing UniversityChongqing 400045China Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China Chongqing Research Center for Advanced Materials Chongqing Academy of Science and TechnologyChongqing 401123China School of Mechanical and Mining Engineering The University of QueenslandBrisbane Qld 4072Australia

Mg-4 Li-3(Al-Si),Mg-8 Li-3(Al-Si)and Mg-12 Li-3(Al-Si)alloys based on theα-Mg,α-Mg+β-Li,β-Li phases,respectively,were produced to investigate the effect of alloying with Al-Si eutectic on the microstructure and mechanical properties of the three *** with the Al-Si eutectic of Mg-xLi(x=4,8 and 12 wt.%)alloys caused the formation of different types of Al-Li precipitates:Al3Li,AlLi and Li3Al2,***,considerable quantities of Mg2Si phase particles were found in the three *** results of tensile tests showed that the Mg-4Li-3(Al-Si)alloy exhibited the highest ultimate tensile strength(UTS)of 249 MPa but the lowest elongation of 6.3%.The Mg-12Li-3(Al-Si)alloy had the highest elongation of 26%but the lowest UTS of 173 *** different mechanical properties were attributed to the different crystal structures of the three alloys and the precipitate with different type,morphology and distribution.

关键词： Mg-Li alloy Al-Si eutectic second phase tensile strength elongation

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The auxiliary controller design based on model-free control in the brain-machine interface

The auxiliary controller design based on model-free control ...

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第30届中国控制与决策会议

作者： Hongguang Pan Wenyu Mi Mei Wang Jinggao Sun College of Electric and Control Engineering Xi'an University of Science and Technology Key Laboratory of Advanced Control and Optimization Technology of Ministry of Education East China University of Science and Technology

In this paper, a model-free control(MFC) method is used to design an artificial feedback to compensate the lack of natural feedback and achieve the reaching task for a voluntary single joint. Considering the MFC only depends on the I/O data of system, and does not need the system model, it can avoid the complex analysis on the brain model, and reduce the difficulty of controller design. Moreover, through choosing different pseudo-partial-derivative values, the influence of the pseudo-partialderivative value is analyzed and a series of control results are given;further, the computing efficiency is improved drastically through a comparison in the simulation.

关键词： auxiliary controller model-free control brain-machine interface

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