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Guar.nteed Cost Attitude Tr.cking Contr.l for.Uncer.ain Quadr.tor.Unmanned Aer.al Vehicle Under.Safety Constr.ints

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IEEE/CAA Jour.al of Automatica Sinica 2024年第6期11卷 1447-1457页

作者： Qian Ma Peng Jin Fr.nk L.lewis School of Automation Nanjing University of Science and TechnologyNanjing 210094China UTA r.sear.h Institute University of Texas at ArlingtonFort WorthTexas 76118 USA IEEE

In this paper.guar.nteed cost attitude tr.cking con-tr.l for.uncer.ain quadr.tor.unmanned aer.al vehicle(QUAV)under.safety constr.ints is ***,an augmented system is constr.cted by the tr.cking er.or.system and r.fer.nce *** tr.nsfor.ation aims to conver. the tr.cking contr.l pr.b-lem into a stabilization contr.l ***,contr.l bar.ier.function and distur.ance attenuation function ar. designed to char.cter.ze the violations of safety constr.ints and toler.nce of uncer.ain distur.ances,and they ar. incor.or.ted into the r.war. function as penalty *** on the modified r.war. function,the pr.blem is simplified as the optimal r.gulation pr.blem of the nominal augmented system,and a new Hamilton-Jacobi-Bellman equation is ***,cr.tic-only r.in-for.ement lear.ing algor.thm with a concur.ent lear.ing tech-nique is employed to solve the Hamilton-Jacobi-Bellman equa-tion and obtain the optimal *** pr.posed algor.thm can not only ensur. the r.war. function within an upper.bound in the pr.sence of uncer.ain distur.ances,but also enfor.e safety *** per.or.ance of the algor.thm is evaluated by the numer.cal simulation.

关键词： Attitude tr.cking contr.l quadr.tor.unmanned aer.al vehicle(QUAV) r.infor.ement lear.ing safety constr.ints uncer.ain distur.ances.

Er.or.based adaptive optimal tr.cking contr.l of nonlinear.discr.te-time systems

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Science China(Infor.ation Sciences) 2024年第1期67卷 154-167页

作者： Chun LI Jinliang DING Fr.nk L.lewis Tianyou CHAI State Key Labor.tor. of Synthetical Automation for.Pr.cess Industr.es Northeastern University UTA r.sear.h Institute The University of Texas at Arlington

In this paper.for.the output tr.cking pr.blem of nonlinear.discr.te-time systems,a per.or.ance index is newly defined using the adaptive dynamic pr.gr.mming(ADP) technique to completely eliminate tr.cking er.or. in *** contr.st to tr.ditional definitions of per.or.ance indices in other.ADP-based methods,the pr.posed per.or.ance index is not only designed fr.m the per.pective of output tr.cking er.or. but also intr.duced er.or. of system states and contr.l inputs at adjacent stages,which is suitable for.pr.ctical situations in many industr.al applications,such as the alumina pr.duction,the flotation pr.cess,and the miner.l gr.nding *** pr.ved that the obtained contr.ller.can make the system output fully tr.ck the given r.fer.nce tr.jector. by applying the iter.tive cr.ter.a of the ADP *** addition,the pr.posed algor.thm was implemented using a data-dr.ven technique and neur.l networ.s to avoid analyzing and deducing the complicated dynamics of actual industr.al ***,using histor.cal data for.a for.ed-cir.ulation evapor.tion system in the alumina pr.duction pr.cess,the effect of the pr.posed appr.ach was ver.fied thr.ugh a numer.cal simulation and compar.d with that of the pr.por.ional-integr.l contr.ller.

关键词： adaptive dynamic pr.gr.mming iter.tive cr.ter.a per.or.ance index tr.cking er.or. tr.cking pr.blem

Contr.l Policy Lear.ing Design for.Vehicle Ur.an Positioning via BeiDou Navigation

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Jour.al of Systems Science & Complexity 2024年第1期37卷 114-135页

作者： QIN Yahang ZHANG Chengye CHEN Ci XIE Shengli lewis Fr.nk L School of Automation Guangdong University of TechnologyGuangzhou 510006China Guangdong Key Labor.tor. of IoT Infor.ation Technology Guangzhou 510006China. Center.for.Intelligent Batch Manufactur.ng Based on IoT Technology Key Labor.tor. of Intelligent Detection and The Inter.et of Things in Manufactur.ng Ministry of EducationGuangzhou 510006China Guangdong-HongKong-Macao Joint Labor.tor. for.Smar. Discr.te Manufactur.ng Guangzhou 510006China Key Labor.tor. of Intelligent Infor.ation Pr.cessing and System Integr.tion of IoT Ministry of EducationGuangzhou 510006China. UTA r.sear.h Institute The University of Texas at ArlingtonFort WorthTX 76019USA

This paper.pr.sents a lear.ing-based contr.l policy design for.point-to-point vehicle positioning in the ur.an envir.nment via BeiDou *** navigating in ur.an canyons,the multipath effect is a kind of inter.er.nce that causes the navigation signal to dr.ft and thus imposes sever. impacts on vehicle localization due to the r.flection and diffr.ction of the BeiDou ***,the author. for.ulated the navigation contr.l system with unknown vehicle dynamics into an optimal contr.l-seeking pr.blem thr.ugh a linear.discr.te-time system,and the point-to-point localization contr.l is modeled and handled by lever.ging off-policy r.infor.ement lear.ing for.feedback *** pr.posed lear.ing-based design guar.ntees optimality with pr.scr.bed per.or.ance and also stabilizes the closed-loop navigation system,without the full knowledge of the vehicle *** is seen that the pr.posed method can withstand the impact of the multipath effect while satisfying the pr.scr.bed conver.ence r.te.A case study demonstr.tes that the pr.posed algor.thms effectively dr.ve the vehicle to a desir.d setpoint under.the multipath effect intr.duced by actual exper.ments of BeiDou navigation in the ur.an envir.nment.

关键词： BeiDou navigation multipath effect pr.scr.bed conver.ence r.te r.infor.ement lear.ing ur.an localization.

r.cent Pr.gr.ss in r.infor.ement Lear.ing and Adaptive Dynamic Pr.gr.mming for.Advanced Contr.l Applications

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IEEE/CAA Jour.al of Automatica Sinica 2024年第1期11卷 18-36页

作者： Ding Wang Ning Gao Der.ng Liu Jinna Li Fr.nk L.lewis IEEE the Faculty of Infor.ation Technology Beijing Key Laboratory of Computational Intelligence and Intelligent SystemBeijing Laboratory of Smart Environmental Protectionand Beijing Institute of Artificial IntelligenceBeijing University of TechnologyBeijing 100124China the School of System Design and Intelligent Manufactur.ng Southern University of Science and TechnologyShenzhen 518055China the Depar.ment of Electr.cal and Computer.Engineer.ng University of Illinois at ChicagoChicago IL 60607 USA the School of Infor.ation and Contr.l Engineer.ng Liaoning Petrochemical UniversityFushun 113001China the UTA r.sear.h Institute the University of Texas at ArlingtonArlington TX 76118 USA

r.infor.ement lear.ing(r.) has r.ots in dynamic pr.gr.mming and it is called adaptive/appr.ximate dynamic pr.gr.mming(ADP) within the contr.l community. This paper.r.views r.cent developments in ADP along with r. and its applications to var.ous advanced contr.l fields. Fir.t, the backgr.und of the development of ADP is descr.bed, emphasizing the significance of r.gulation and tr.cking contr.l pr.blems. Some effective offline and online algor.thms for.ADP/adaptive cr.tic contr.l ar. displayed, wher. the main r.sults towar.s discr.te-time systems and continuous-time systems ar. sur.eyed, ***, the r.sear.h pr.gr.ss on adaptive cr.tic contr.l based on the event-tr.gger.d fr.mewor. and under.uncer.ain envir.nment is discussed, r.spectively, wher. event-based design, r.bust stabilization, and game design ar. r.viewed. Mor.over. the extensions of ADP for.addr.ssing contr.l pr.blems under.complex envir.nment attr.ct enor.ous attention. The ADP ar.hitectur. is r.visited under.the per.pective of data-dr.ven and r. fr.mewor.s,showing how they pr.mote ADP for.ulation ***, sever.l typical contr.l applications with r.spect to r. and ADP ar. summar.zed, par.icular.y in the fields of wastewater.tr.atment pr.cesses and power.systems, followed by some gener.l pr.spects for.futur. r.sear.h. Over.ll, the compr.hensive sur.ey on ADP and r. for.advanced contr.l applications has d emonstr.ted its r.mar.able potential within the ar.ificial intelligence er.. In addition, it also plays a vital r.le in pr.moting envir.nmental pr.tection and industr.al intelligence.

关键词： Adaptive dynamic pr.gr.mming(ADP) advanced contr.l complex envir.nment data-dr.ven contr.l event-tr.gger.d design intelligent contr.l neur.l networ.s nonlinear.systems optimal contr.l r.infor.ement lear.ing(r.)

Bimetallic r.duced gr.phene oxide/zeolitic imidazolate fr.mewor. hybr.d aer.gels for.efficient heavy metals r.moval

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Fr.ntier. of Chemical Science and Engineer.ng 2024年第8期18卷 49-66页

作者： Nur.l A.Mazlan Allana lewis Fr.z Saeed Butt r.jakumar. Kr.shnamoor.hi Siyu Chen Yi Huang School of Engineer.ng Institute for Materials&ProcessesThe University of EdinburghEdinburgh EH93FBUK

Gr.phene oxide is a pr.mising adsor.tion ***,it has been difficult to r.cycle and separ.te gr.phene oxide in the *** alleviate this pr.blem,gr.phene oxide was ther.ally r.duced to pr.duce por.us hydr.gel which was then functionalized with *** functional gr.ups act as not only adsor.tion sites but also nucleation sites for.in situ cr.stallization of cobalt-doped zeolitic-imidazolate-fr.mewor.-8 *** effects of cobalt-doping contents on the physicochemical and adsor.tion pr.per.ies of the r.sulting aer.gel wer. also evaluated by var.ing the cobalt *** instance,the r.duced gr.phene oxide-polydopamine/50cobalt-zeolitic-imidazolate-fr.mewor.-8 aer.gel exhibited a high sur.ace ar.a of 900 m^(2)·g^(-1)and maintained the str.ctur. in water.after.ten *** as-synthesized aer.gels showed an ultr.high adsor.tion capacity of 1217±24.35 mg·g^(-1)with a r.moval efficiency of>99%of lead,as well as excellent adsor.tion per.or.ance towar. other.heavy metals,such as copper.and cadmium with adsor.tion capacity of 1163±34.91 and 1059±31.77 mg·g^(-1),*** impor.antly,the lead adsor.tion stabilized at 1023±20.5 mg·g^(-1)with a r.moval efficiency of>80%after.seven cycles,indicating their.potential in heavy metal r.moval fr.m industr.al wastewater.

关键词： r.O Co-doped ZIF-8 heavy metals adsor.tion aer.gel

Out-of-Equilibr.um Assembly Based on Host-Guest Inter.ctions

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CCS Chemistr. 2024年第1期6卷 27-40页

作者： Guotai Li r.ece W.lewis r.enk Eelkema School of r.habilitation Sciences and Engineer.ng University of Health and Rehabilitation SciencesQingdao 266071 Depar.ment of Chemical Engineer.ng Delft University of Technology2629 HZ Delft

The field of supr.molecular.chemistr. is r.pidly pr.gr.ssing,tr.nsitioning fr.m the cr.ation of ther.odynamically stable systems found in local or.global minima on the fr.e ener.y landscape to the development of out-of-equilibr.um systems that r.ly on chemical r.actions to establish and maintain their.*** the past decade,numer.us ar.ificial out-of-equilibr.um systems have been devised in var.ous domains of supr.molecular.chemistr.,many of which have been extensively ***,one ar.a that has r.ceived limited attention thus far.is the use of out-of-equilibr.um pr.cesses to r.gulate host-guest *** minir.view aims to addr.ss this gap by explor.ng the constr.ction of out-ofequilibr.um systems based on host-guest complexation,which likely employs similar.str.tegies to those employed in analogous noncovalent *** r.view begins with a summar. of these shar.d ***,it discusses r.pr.sentative publications that exemplify these str.tegies and classifies thembased onwhich component is being modulated-host,guest,or.competitive *** this examination,our.objective is to shed light on the design of out-of-equilibr.um systems r.lying on host-guest inter.ctions and pr.vide valuable insights into the pr.par.tion str.tegies for.var.ous tr.nsient mater.als.

关键词： out-of-equilibr.um host-guest chemistr. self-assembly supr.molecular.mater.als chemical fuel

Novel photoactive mater.al and fabr.cation techniques for.solar.cells application:nanocellulose-based gr.phene oxide CdS composite

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Clean Ener.y 2024年第2期8卷 189-216页

作者： Hassan Or.yomi Shoyiga Stephen Okiemute Akpasi Joseph Akpan Ubani Oluwaseun Amune Sammy lewis Kiambi Chemistr. Depar.ment North-West UniversityMafikengSouth Africa Mater.al Science Innovation and Modelling(MaSIM)r.sear.h Focus Ar.a Faculty of Natural and Agricultural SciencesNorth-West University(Mafikeng Campus)MmabathoSouth Africa Gr.en Engineer.ng r.sear.h Gr.up Chemical Engineering DepartmentDurban University of TechnologyDurbanSouth Africa Industr.al Engineer.ng Depar.ment Durban University of TechnologyDurbanSouth Africa Chemical Engineer.ng Depar.ment Edo State UniversityUzairueNigeria Chemical Engineer.ng Depar.ment Vaal University of TechnologyVanderbijlparkSouth Africa

In r.cent times,solar.ener.y has become one of the lar.est available sour.es of r.newable ener.y at our.***,the design of highly efficient solar.cells is incr.asingly becoming cr.cial as ther. has been a sur.e for.economically viable alter.ative ener.y sour.es with the lowest *** advances have been made thr.ugh differ.nt r.utes to make photovoltaic(PV)/solar.technologies economically viable,eco-fr.endly and consequently *** a r.sult,cellulose nanomater.als have become one of the emer.ing technologies in this r.gar. because of the advantages of high-value bio-based nanostr.ctur.d mater.als,such as their.abundance and ***-based photoactive nanocomposite mater.als can be made by integr.ting conducting photoactive and electr.conductive mater.als with hydr.philic biocompatible *** nanopar.icles,such as gr.phene/r.duced gr.phene oxide cadmium sulphide quantum dots,amongst other.,can be intr.duced into the nanocellulose matr.x and can be applied either.as char.e tr.nspor.er. or.photoactive mater.als in differ.nt types of solar.***,in this r.view,we highlight the optoelectr.nic pr.per.ies of differ.nt photoactive mater.als,par.icular.y nanocellulose-based gr.phene nanocomposites;their.efficiencies and dr.wbacks wer. *** effect of doping each PV mater.al on the PV per.or.ance is also *** is anticipated that the novel mater.al would r.sult in a r.duction in the cost of solar.cells,jointly enhancing their.efficacy in gener.ting envir.nmentally fr.endly *** the fabr.cation techniques and equipment play a cr.cial r.le in the development of solar.cells,the fabr.cation techniques of bulk-heter.junction(BHJ)cells containing a nanocellulose-based gr.phene composite and case studies of alr.ady fabr.cated BHJ PV cells with nanocellulose-based gr.phene composite ar. discussed.

关键词： nanocellulose-based composite bulk heter.junction gr.phene composite photoactive mater.als fabr.cation techniques solar.ener.y power.conver.ion efficiency