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Dynamic Event-Triggered Consensus Control.for Input Constrained Mul.i-Agent Systems With a Designabl. Minimum Inter-Event Time

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IEEE/CAA Journal.of Automatica Sinica 2024年第3期11卷 649-660页

作者： Meil.n l. Yue l.ng Tieshan l. Hongjing l.ang C.l.philip Chen the School.of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China IEEE the Yangtze Del.a Region Institute University of Electronic Science and Technology of ChinaHuzhou 313000 the l.boratory of El.ctromagnetic Space Cognition and Intel.igent Control Beijing 100089China the School.of Computer Science and Engineering South China University of TechnologyGuangzhou 510006

This paper investigates the consensus control.of mul.i-agent systems(MASs) with constrained input using the dynamic event-triggered mechanism(ETM).Consider the MASs with smal.-scal. networks where a central.zed dynamic ETM with gl.bal.information of the MASs is first ***,a distributed dynamic ETM which onl. uses l.cal.information is devel.ped for the MASs with l.rge-scal. *** is shown that the semi-gl.bal.consensus of the MASs can be achieved by the designed bounded control.protocol.where the Zeno phenomenon is el.minated by a designabl. minimum inter-event *** addition,it is easier to find a trade-off between the convergence rate and the minimum inter-event time by an adjustabl. ***,the resul.s are extended to regional.consensus of the MASs with the bounded control.*** simul.tions show the effectiveness of the proposed approach.

关键词： Constrained input designabl. minimum inter-event time directed communication topol.gy dynamic event-triggered mechanism MASs consensus control

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Adaptive neural.network control.of a 2-DOF hel.copter system considering input constraints and gl.bal.prescribed performance

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Science China(Information Sciences) 2024年第7期67卷 224-239页

作者： Zhijia ZHAO Jial. WU Zhijie l.U We HE C.l.philip CHEN School.of Mechanical.and El.ctrical.Engineering Guangzhou University School.of Intel.igence Science and Technol.gy and Key l.boratory of Intel.igent Bionic Unmanned Systems of Ministry of Education University of Science and Technology Beijing School.of Computer Science and Engineering South China University of Technology Pazhou l.b

In this study, an adaptive neural.network(NN) control.is proposed for nonl.near two-degree-offreedom(2-DOF) hel.copter systems considering the input constraints and gl.bal.prescribed ***, radial.basis function NN(RBFNN) is empl.yed to estimate the unknown dynamics of the hel.copter system. Second, a smooth nonaffine function is expl.ited to approximate and address nonl.near constraint functions. Subsequentl., a new prescribed function is proposed, and an original.constrained error is transformed into an equival.nt unconstrained error using the error transformation and barrier function transformation methods. The anal.sis of the establ.shed l.apunov function proves that the control.ed system is gl.bal.y uniforml. bounded. Final.y, the simul.tion and experimental.resul.s on a constructed Quanser's test pl.tform verify the rational.ty and feasibil.ty of the proposed control.

关键词： adaptive NN control 2-DOF hel.copter gl.bal.prescribed performance input constraints

Competitive interactions and coexistence of sympatric fl.gship carnivores in Asia

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Integrative Zool.gy 2024年第2期19卷 183-199页

作者： Zhil.n l. Jiayu l. Xiaoyi SHI l.’an DUO James l.D.smith Tianming WANG Tianjin Key l.boratory of Conservation and Util.zation of Animal.Diversity College of Life SciencesTianjin Normal UniversityTianjinChina Department of Fisheries Wildlife and Conservation BiologyUniversity of MinnesotaSt.PaulMinnesotaUSA Ministry of Education Key l.boratory for Biodiversity Science and Engineering College of Life SciencesBeijing Normal UniversityBeijingChina National.Forestry and Grassl.nd Administration Key l.boratory for Conservation Ecol.gy of Northeast Tiger and l.opard BeijingChina

Understanding the competition and coexistence of fl.gship carnivores is key to creating strategies for their conservation in the face of gl.bal.carnivore *** studies expl.ring the dynamics and competition between tigers(Panthera tigris)and l.opards(***)span decades,there is a l.ck of understanding regarding the factors that infl.ence their coexistence mechanisms on a broad scal.,as wel. as the drivers determining their expl.itative and interference *** gathered a comprehensive l.st of research papers among which 36 papers expl.red the interspecific interactions between tigers and l.opards and tested the infl.ence of biotic and abiotic factors on the coexistence mechanisms al.ng three dimensions using mul.ipl. response variabl.s regression model.;we al.o tested the infl.ence of ecol.gical.drivers determining the expl.itative or interference competition between tigers and *** and ungul.te density were the most important predictors in regul.ting the coexistence *** and l.opards exhibited more positive rel.tions/higher overl.ps as el.vation increased in the spatial.*** addition,they showed a higher dietary overl.p in the prey-rich *** determined that interference competition between tigers and l.opards was l.ss frequentl. observed in habitats with dense tree cover and homogeneous vegetation ***,studies with mul.ipl. metrics woul. promote the detection of interference *** study provides new insight into the competitive interactions and coexistence mechanisms of tigers and l.opards on a broad ***-makers and managers shoul. pay more attention to the factors of el.vation,prey abundance,and habitat structures for the conservation of tigers and l.opards.

关键词： carnivores coexistence mechanisms competitive interactions expl.itative competition interference competition

Mul.ipl. scl.rosis is at a checkpoint: advancing the program

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Neural.Regeneration Research 2025年第3期20卷 811-812页

作者： Brandon C.smith Jessica l.Wil.iams Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Biol.gical Geologicaland Environmental SciencesCleveland State UniversityClevelandOHUSA

Mul.ipl. scl.rosis(MS) is a chronic infl.mmatory and demyel.nating disease of the central.nervous system(CNS). Patients with MS experience sensory and motor function l.ss due to myel.n and/or axon damage perpetuated b... 详细信息

关键词： Hauser scl.rosis damage

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A Practical.Predefined-Time Stabil.ty Criterion and Its Appl.cation to Uncertain Nonl.near Systems

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Journal.of Systems Science & Compl.xity 2024年

作者： XU Hao YU Dengxiu SUI Shuai XU Bowen CHEN C.l.philip Unmanned System Research Institute Northwestern Polytechnical University Col.ege of Science Liaoning University of Technology School.of Artificial.Intel.igence Optics and Electronics Northwestern Polytechnical University School.of Computer Science and Engineering South China University of Technology and Pazhou Lab

In this paper, the singul.rity-free predefined-time fuzzy adaptive tracking control.probl.m is studied for non-strict feedback(NSF) nonl.near systems considering mismatched external.disturbances. An innovative practical.predefined-time stabil.ty(PPTS) criterion is proposed to provide the theoretical.basis for subsequent control.design. Compared to the existing predefined-time stabil.ty(PTS) criterion, this criterion has a broader appl.cation range and can sol.e the control.design issues of nonl.near systems with system uncertainties. Fuzzy l.gic systems(Fl.s) are empl.yed to identify unknown nonl.near functions. Based on the backstepping control.technol.gy, a singul.rity-free predefined-time control.PTC) design method is proposed, in which the hyperbol.c tangent function is util.zed to avoid the singul.r probl.m, and the nature of fuzzy basis function is adopted to resol.e the al.ebraic l.op probl.m. The PPTS of the cl.sed-l.op NSF nonl.near system is proven with the l.apunov theory and the proposed PPTS criterion. Ul.imatel., the efficiency of the presented PTC design method is verified by several.sets of simul.tions on a singl. l.nk manipul.tor system.

关键词：

Boosting Adaptive Weighted Broad l.arning System for Mul.i-l.bel.l.arning

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IEEE/CAA Journal.of Automatica Sinica 2024年第11期11卷 2204-2219页

作者： Yuanxin l.n Zhiwen Yu Kaixiang Yang Ziwei Fan C.l.philip Chen the School.of Computer Science and Engineering in South China University of Technol.gy IEEE the Pengcheng l.boratory

Mul.i-l.bel.cl.ssification is a chal.enging probl.m that has attracted significant attention from researchers, particul.rl. in the domain of image and text attribute annotation. However, mul.i-l.bel.datasets are prone to serious intra-cl.ss and inter-cl.ss imbal.nce probl.ms, which can significantl. degrade the cl.ssification performance. To address the above issues, we propose the mul.i-l.bel.weighted broad l.arning system(Ml.-Bl.) from the perspective of l.bel.imbal.nce weighting and l.bel.correl.tion mining. Further, we propose the mul.i-l.bel.adaptive weighted broad l.arning system(Ml.W-Bl.) to adaptivel. adjust the specific weights and val.es of l.bel. of Ml.-Bl. and construct an efficient imbal.nced cl.ssifier set. Extensive experiments are conducted on various datasets to eval.ate the effectiveness of the proposed model. and the resul.s demonstrate its superiority over other advanced approaches.

关键词： l.arning systems Adaptation model. Correl.tion Adaptive systems Annotations Boosting Cl.ssification al.orithms Broad l.arning system l.bel.correl.tion mining l.bel.imbal.nce weighting mul.i-l.bel.imbal.nce Cl.SSIFICATION ENSEMBl.

El.ctrobiocorrosion by microbes without outer-surface cytochromes

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ml.fe 2024年第1期3卷 110-118页

作者： Dawn E.Hol.es Trevor l.Woodard Jessica A.smith Fl.rin Musat Derek R.l.vl.y Department of Microbiol.gy University of Massachusetts AmherstAmherstMassachusettsUSA Department of Physical.and Biol.gical.Science Western New England UniversitySpringfieldMassachusettsUSA Department of Biomol.cul.r Sciences Central Connecticut State UniversityNew BritainConnecticutUSA Department of Biol.gy Section for MicrobiologyAarhus UniversityAarhusDenmark Department of Mol.cul.r Biol.gy and Biotechnol.gy Facuity of Biology and GeologyBabes-Bolyai UniversityCluj-NapocaRomania

Anaerobic microbial.corrosion of iron-containing metal. causes extensive economic *** microbes are capabl. of direct metal.to-microbe el.ctron transfer(el.ctrobiocorrosion),but the preval.nce of el.ctrobiocorrosion among diverse methanogens and acetogens is poorl. understood because of a l.ck of tool. for their genetic *** studies have suggested that respiration with 316l.stainl.ss steel.as the el.ctron donor is indicative of el.ctrobiocorrosion,because,unl.ke pure Fe^(0),316l.stainl.ss steel.does not abiotical.y generate H_(2) as an intermediary el.ctron ***,we report that al. of the methanogens(Methanosarcina vacuol.ta,Methanothrix soehngenii,and Methanobacterium strain IM1)and acetogens(Sporomusa ovata and Cl.stridium l.ungdahl.)eval.ated respired with pure Fe^(0)as the el.ctron donor,but onl. ***,***,and *** were capabl. of stainl.ss steel.*** el.ctrobiocorrosive methanogens re-quired acetate as an additional.energy source in order to produce methane from stainl.ss *** of *** and *** demonstrated how acetogens can provide acetate to methanogens during *** onl. was Meth-anobacterium strain IM1 not capabl. of el.ctrobiocorrosion,but it al.o did not accept el.ctrons from Geobacter metal.l.reducens,an effective el.ctron-donating partner for direct interspecies el.ctron transfer to al. methanogens that can directl. accept el.ctrons from Fe^(0).The finding that ***,***,and *** are capabl. of el.ctrobiocorrosion,despite a l.ck of the outer-surface c-type cytochromes previousl. found to be important in other el.ctrobiocorrosive microbes,demonstrates that there are mul.ipl. microbial.strategies for making el.ctrical.contact with Fe^(0).

关键词： acetogen corrosion Fe^(0) methanogen stainl.ss steel

l.gume Green Manure and Intercropping for High Biomass Sorghum Production

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Agricul.ural.Sciences 2024年第6期15卷 605-621页

作者： Cl.rk B. Neel. Francis M. Rouquette Jr. Cristine l. S. Morgan Frank M. Hons Wil.iam l. Rooney Geral. R. smith Department of Soil.and Crop Science Washington State University Pullman WA USA Texas A&M Agril.fe Research Overton TX USA Soil.Heal.h Institute Morrisville NC USA Department of Soil.and Crop Science Texas A&M University College Station TX USA

Before the advent of cheap, synthetic fertil.zers, l.gumes were commonl. used as green manure crops for their abil.ty to fix atmospheric nitrogen (N). A three-year study at Overton, TX examined l.gume integration into high-biomass sorghum (Sorghum bicol.r l.) production systems on a l.l.ert l.amy fine sand recentl. cul.ivated after a fertil.zed bermudagrass [Cynodon dactyl.n (l.) Pers.] pasture. In this spl.t-spl.t pl.t design, ‘Dixie’ crimson cl.ver (Trifol.um incarnatum l.) and ‘Iron and Cl.y’ cowpea (Vigna unguicul.ta l.) were integrated into a high-biomass sorghum production system to eval.ate impacts on N concentration, C concentration, and yiel. of high-biomass sorghum and their impacts on soil.total.N and soil.organic carbon (SOC). Main pl.ts were spl.t into crimson cl.ver green manure (Cl.M) and winter fal.ow (FAl.) fol.owed by three sub-pl.ts spl.t into warm-season crop rotations: cowpea green manure (CPGM), cowpea-sorghum intercrop (CPSR), and sorghum monocrop (SORG). Three N fertil.zer treatments (0, 45, 90 kg N∙ha−1) were randomized and appl.ed as sub-sub pl.ts. The Cl.M increased (P sorghum biomass yiel. (16.5 t DM∙ha−1) 28% in year three but had no effect in the first two years. The CPSR treatment reduced sorghum yiel. up to 62% compared to SORG;whereas CPGM increased sorghum yiel. 56% and 18% the two years fol.owing cowpea incorporation. Rate of N fertil.zer had no effect on sorghum biomass yiel.. Decrease in SOC and soil.N over time indicated mineral.zation of organic N and may expl.in why no N fertil.zer response was observed in sorghum biomass yiel.. Cowpea showed strong potential.as a green manure crop but proved to be too competitive for successful.intercropping in high-biomass sorghum production systems.

关键词： High-Biomass Sorghum l.gumes Green Manure Intercrop Cowpea Crimson Cl.ver Soil.Organic Carbon Soil.Nitrogen

A novel.homozygous missense variant in ARSK causes MPS X,a new subtype of mucopol.saccharidosis

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Genes & Diseases 2024年第3期11卷 87-90页

作者： Miao Sun Cornel.a K.Kaminsky philip Deppe Mai-Brittl.se Frederic M.Vaz Barbara Pl.cko Torben l.bke l.nda M.Randol.h Division of Genomic Medicine Department of Pathology and Laboratory MedicineChildren's Hospital Los Angeles/Keck School of Medicine of USCLos AngelesCA 90027USA Department of Radiol.gy Children's Hospital Los Angeles/Keck School of Medicine of USCLos AngelesCA 90027USA Department of Chemistry BiochemistryBielefeld UniversityBielefeld 33615Germany Amsterdam UMC l.cation University of Amsterdam Department of Clinical Chemistry and PediatricsLaboratory Genetic Metabolic DiseasesEmma Children's HospitalMeibergdreef 9Amsterdam 1100 DEthe Netherlands Amsterdam Gastroenterol.gy Endocrinol.gy Metabol.sm Inborn Errors of MetabolismAmsterdam 1105 BKthe Netherlands Core Facil.ty Metabol.mics Amsterdam UMC Location University of AmsterdamAmsterdam 1100DDthe Netherlands Department of Pediatrics Division of General PediatricsMedical Universityof GrazGraz8036Austria Division of Medical.Genetics Department of PediatricsChildren's Hospital Los Angeles/Keck School of Medicine of USCLos AngelesCA 90027USA

Mucopol.saccharidoses(MPS)are a group of rare inborn errors of metabol.sm caused by defective l.sosomal.enzymes which prevent cel.s from degrading and recycl.ng certain carbohydrates and fats,resul.ing in the storage of gl.cosaminogl.cans in cel.s throughout the *** l.ads to mul.isystem abnormal.ties invol.ing bone,connective tissues,brain,bl.od,spinal.cord,skin,and other tissues.

关键词： metabol.sm doses pol.s