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Goal-Oriented Control Systems(GOCS):From h.W to Wh.T

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 816-819页

作者： wen-h.a chen th. Department of Aeronautical and Automotive Engineering Loughborough UniversityLeicestershireLE113TUU.K.

Brief:New control th.ory is required to underpin safe design and deployment of future h.gh.y automated systems to deal with.uncertain environments and complicated tasks,enabled by AI and oth.r advanced ***-Oriented Control Systems offer potential to transform th. control system design from currently instructing a control system h.w to perform a task to specifying wh.t is to be ach.eved.

关键词： automated instru system

Impact of wastewater treatment plant effluent disch.rge on th. antibiotic resistome in downstream aquatic environments:a mini review

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Frontiers of Environmental Science & Engineering 2024年第3期18卷 131-141页

作者： Zh.guo Su Lyujun chen Dongh.i wen Sch.ol of Environment Tsinghua UniversityBeijng 100084China 2 Zh.jiang Provincial Key Laboratory of Water Science and Tech.ology Department of Environmental Technology and EcologyYangtze Delta Region Institute of Tsinghua UniversityJiaxing 314050China College of Environmental Sciences and Engineering Peking UniversityBeijing 100871China

Antimicrobial resistance(AMR)h.s emerged as a significant ch.llenge in h.man *** treatment plants(WWTPs),acting as a link between h.man activities and th. environment,create ideal conditions for th. selection and spread of antibiotic resistance genes(ARGs)and antibioticresistant bacteria(ARB).Unfortunately,current treatment processes are ineffective in removing ARGs,resulting in th. release of large quantities of ARB and ARGs into th. aquatic environment th.ough.WWTP ***,in turn,leads to th.ir dispersion and potential transmission to h.man th.ough.water and th. food *** safeguard h.man and environmental h.alth.it is crucial to compreh.nd th. mech.nisms by wh.ch.WWTP effluent disch.rge influences th. distribution and diffusion of ARGs in downstream *** th.s study,we examine th. latest research.s on th. antibiotic resistome in various waterbodies th.t h.ve been exposed to WWTP effluent,h.gh.igh.ing th. key influencing ***,recommendations for future research.and management strategies to control th. dissemination of ARGs from WWTPs to th. environment are provided,with.th. aim to ach.eve th.“One h.alth.objective.

关键词： Antibiotic resistance genes(ARGs) Wastewater treatment plants(WWTPs) Effluent-receiving waterbodies Environmental risk Influencing mech.nism

Th. Influence of th. Sun and Moon on th. Observation of Very h.gh.Energy Gamma-ray Sources Using EAS Arrays

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Research.in Astronomy and Astroph.sics 2024年第6期24卷 245-252页

作者： Tao wen Songzh.n chen Benzh.ng Dai Sch.ol of Ph.sics and Astronomy Yunnan UniversityKunming 650091China Key Laboratory of Particle Astroph.sics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Tianfu Cosmic Ray Research.Center Chengdu 610000China

With.great advance of ground-based extensive air sh.wer arrays,such.as Lh.ASO and h.WC,many very h.gh.energy(Vh.)gamma-ray sources h.ve been discovered and are being monitored regardless of th. day and th. ***,th. Sun and Moon would h.ve some impacts on th. observation of gamma-ray sources,wh.ch.h.ve not been taken into account in previous *** th.s paper,th. influence of th. Sun and Moon on th. observation of very h.gh.energy gamma-ray sources wh.n th.y are near th. line of sigh. of th. Sun or Moon is *** tracks of all th. known Vh. sources are scanned and several Vh. sources are found to be very close to th. line of sigh. of th. Sun or Moon during some *** absorption of very h.gh.energy gamma rays by sunligh. is estimated with.detailed meth.d and some useful conclusions are *** main influence is th. block of th. Sun and Moon on gamma rays and th. sh.dow on th. cosmic ray *** influence is investigated considering th. detector angular resolution and some strategies on data analysis are proposed to avoid th. underestimation of th. gamma-ray emission.

关键词： astroparticle ph.sics Sun:general meth.ds:observational Sun:UV radiation

Effect of nano-carbon black content on wetting ph.nomenon of molten steel and alumina-carbon ceramic filter substrates

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Journal of Iron and Steel Research.International 2024年第8期31卷 1900-1913页

作者： Jin-wen Song wen Yan Zh. chen Ying Liu Sh.o-song h.ng Th. State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina National-provincial Joint Engineering Research.Center of h.gh.Temperature Materials and Lining Tech.ology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Jiangsu Sh.ng Nai New Materials Co. Ltd.Taizhou 225503JiangsuChina

Th. effect of nano-carbon black content(O,8 and 12 wt.%)on th. wettability of molten steel on Al_(2)O_(3)-C substrates was investigated by th. sessile drop wetting meth.d at 1500℃ under argon *** th. beginning of th. wetting experiment,th. contact angle decreased with.th. increase in nano-carbon black *** th. wetting experiment progressed,FeAl_(2)0_(4) layer and sh.et Al_(2)O_(3) layer were found at th. interface between th. molten steel and th. Al_(2)O_(3)-C substrates with.O and 8 wt.% nano-carbon black content,and th. contact angle deceased with.*** th. content of nano-carbon black was 12 wt.%,a large number of nano-Al_(2)O_(3) wh.skers were observed,wh.ch.made th. contact angle between th. molten steel and Al_(2)O_(3)-C substrate become *** on th. scanning electron microscope and energy dispersive spectrometry results,th. formation mech.nism of FeAl2O4 layer and Al_(2)O_(3) layer and th. interfacial reaction mech.nism were proposed.

关键词： Contact angle Nano-carbon black Al_(2)O_(3)-C substrate Molten steel Interfacial reaction

Robust fixed-time fligh. controller for a dual-system convertible UAV in th. cruise mode

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Defence Tech.ology（防务技术） 2024年第9期39卷 53-66页

作者： Lulu chen Zh.nbao Liu Qingqing Dang wen Zh.o wenyu chen Sch.ol of Civil Aviation Northwestern Polytechnical UniversityXi'an 710072China Sh.nzh.n Research.Institute of North.estern Polytech.ical University Shenzhen 518057China Air and Missile Defense College Air Force Engineering UniversityXi'an 710051China

Th.s paper investigates th. attitude tracking control problem for th. cruise mode of a dual-system convertible unmanned aerial veh.cle(UAV)in th. presence of parameter uncertainties,unmodeled uncertainties and wind ***,a fixed-time disturbance observer(FXDO)based on th. bi-limit h.mogeneity th.ory is designed to estimate th. lumped disturbance of th. convertible UAV ***,a fixed-time integral sliding mode control(FXISMC)is combined with.th. FXDO to ach.eve strong robustness and ch.ttering ***-limit h.mogeneity th.ory and Lyapunov th.ory are applied to provide detailed proof of th. fixed-time ***,numerical simulation experimental results verify th. robustness of th. proposed algorith. to model parameter uncertainties and wind *** addition,th. proposed algorith. is deployed in a open-source UAV autopilot and its effectiveness is furth.r demonstrated by h.rdware-in-th.-loop experimental results.

关键词： Convertible UAV Fligh. control Disturbance observer Fixed-time control

An ionic liquid-assisted strategy for enh.nced anticorrosion of low-energy PEO coatings on magnesium–lith.um alloy

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Journal of Magnesium and Alloys 2024年第6期12卷 2380-2396页

作者： You Zh.ng Ch.ping chen h.oyue Tian Sh.qi Wang chen wen Fei chen College of New Materials and Ch.mical Engineering Hydrogen Energy Research CentreBeijing Institute of Petrochemical TechnologyBeijing 102617China Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Tech.ology Harbin Institute of TechnologyHarbin 150001China Beijing Spacecrafts China Academy of Space TechnologyBeijing 100190China

A low-energy plasma electrolytic oxidation(LePEO)tech.ique is developed to simultaneously improve energy efficiency and *** liquids(1-butyl-3-meth.limidazole tetrafluoroborate(BmimBF_(4)))as sustainable corrosion inh.bitors are ch.sen to investigate th. corrosion inh.bition beh.vior of ionic liquid(ILs)during th. LePEO process for LA91 magnesium-lith.um(Mg-Li)*** sh.w th.t th. ionic liquid BmimBF_(4)participates in th. LePEO coating formation process,causing an increment in coating th.ckness and surface *** low conductivity of th. ionic liquid is responsible for th. voltage and breakdown voltage increases during th. LePEO with.IL process(LePEO-IL).After adding BmimBF_(4),corrosion current density decreases from 1.159×10^(−4)A·cm^(−2)to 8.143×10^(−6)A·cm^(−2).Th. impedance modulus increases to 1.048×10^(4)Ω·cm^(−2)and neutral salt spray remains intact for 24 *** superior corrosion resistance of th. LePEO coating assisted by ionic liquid could be mainly attributed to its compact and th.ck barrier layer and ph.sical absorption of ionic *** ionic liquid-assisted LePEO tech.ique provides a promising approach.to reducing energy consumption and improving film performance.

关键词： Magnesium-lith.um alloy Plasma electrolytic oxidation Low energy Ionic liquid Corrosion resistance

Asymmetric radical allylation of β-keto esters with.vinyl cyclopropanes by dual ph.toredox/nickel catalysis

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Science Ch.na Ch.mistry 2024年第11期67卷 3807-3816页

作者： wen-Yuan Qu Xue-Song Zh.u wen-Jing Xiao Jia-Rong chen Engineering Research.Center of Ph.toenergy Utilization for Pollution Control and Carbon Reduction Ministry of EducationCollege of Chemistry Central China Normal University Wuh.n Institute of Ph.toch.mistry and Tech.ology Key Laboratory of Organo-Ph.rmaceutical Ch.mistry of Jiangxi Province Gannan Normal University

Radical-involved allylation reactions h.ve emerged as a powerful platform for construction of carbon-carbon and carbonh.teroatom bonds, facilitating th. strategic incorporation of diverse allyl moieties. Neverth.less, th.s burgeoning field still faces ongoing ch.llenges, including limitations of radical precursors and coupling partners, and difficulties in ach.eving enantiocontrol. h.rein, we report for th. first time a h.gh.y enantioselective radical allylation involving β-keto esters with.vinyl cyclopropanes utilizing a synergistic dual ph.toredox/nickel catalysis under visible ligh. irradiation. Th. mild and redox-neutral catalytic protocol demonstrates an extensive substrate compatibility and good functional tolerance, providing access to enantioenrich.d β-keto esters featuring quaternary α-stereocenter with.good yields and h.gh.enantioselectivities. Preliminary mech.nistic studies h.ve uncovered th.t th. success of th. reaction h.nges on th. dual roles of nickel catalyst, including in situ formation of ph.toredox sensitive substrate/Ni complex and th. ensuing asymmetric radical addition step.

关键词： asymmetric allylation ph.toredox catalysis radical addition nickel catalysis β-keto esters vinyl cyclopropanes

Application Analysis of Multiple Neurons Connected with.Fast Inh.bitory Synapses

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Journal of Bionic Engineering 2024年第4期21卷 1905-1918页

作者： wen Duan Weih.i chen Jianh.a Wang Zh.ngcai Pei Jingmeng Liu Jianer chen Sch.ol of Automation Science and Electrical Engineering Beihang UniversityXueyuan RoadBeijing100191China h.ngzh.u Innovation Institute Beihang UniversityChuanghui StreetHangzhou310051ZhejiangChina Sch.ol of Electrical Engineering and Automation Anhui UniversityAnhui230601ZhejiangChina Zh.jiang Reh.bilitation Medical Center Binsheng RoadHangzhou310052ZhejiangChina

Almost all living organisms exh.bit autonomic oscillatory activities,wh.ch.are primarily generated by th. rh.th.ic activities of th.ir neural *** nonlinear oscillator models h.ve been proposed to elucidate th.se neural beh.viors and subsequently applied to th. domain of robot ***,th. oscillation patterns generated by th.se models are often unpredictable and need to be obtained th.ough.parameter *** study introduces a math.matical model th.t can be used to analyze multiple neurons connected th.ough.fast inh.bitory *** ch.racteristic of th.s oscillator is th.t its stationary point is stable,but th. location of th. stationary point ch.nges with.th. system *** th.ough.reasonable topology and th.esh.ld parameter selection can th. oscillation be *** study analyzed th. conditions for stable oscillation in two-neuron networks and th.ee-neuron networks,and obtained th. basic rules of th. ph.se relationsh.p of th. oscillator network establish.d by th.s *** addition,th.s study also introduces synch.onization mech.nisms into th. model to enable it to be synch.onized with.th. sensing ***,th.s study used th.se th.ories to establish.a robot single leg joint angle generation *** experimental results sh.wed th.t th. simulated robot could ach.eve synch.onization with.h.man motion,and h.d better control effects compared to traditional oscillators.

关键词： Oscillator Ph.se trajectory Synaptic th.esh.ld Synch.onization Motion generation

Spatially Coupled Codes via Bidirectional Block Markov Superposition Transmission

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Tsingh.a Science and Tech.ology 2024年第3期29卷 656-670页

作者： Gaoyan Li Sh.ncheng Zh.o h.iqiang chen Jinming wen College of Information Science and Tech.ology Jinan UniversityGuangzhou 510632China Guangxi Key Laboratory of Multimedia Communications and Network Tech.ology Guangxi UniversityNanning 530004China

In th.s paper,we present a new class of spatially coupled codes obtained by using both.non-recursive and recursive block-oriented *** resulting codes are termed as bidirectional block Markov superposition transmission(BiBMST)***,we perform an iterative decoding th.esh.ld analysis according to protograph.based extrinsic information transfer(PEXIT)ch.rts for th. BiBMST codes over th. binary erasure ch.nnels(BECs).Secondly,we derive th. generator and parity-ch.ck matrices of th. BiBMST ***,extensive numerical results are presented to sh.w th. advantages of th. proposed BiBMST ***,our numerical results sh.w th.t,under th. constraint of an equal decoding latency,th. BiBMST codes perform better th.n th. recursive BMST(rBMST)***,th. simulation results sh.w th.t,in finite-length.regime,negligible performance gain is obtained by increasing th. encoding *** solve th.s limitation by introducing partial superposition,and th. resulting codes are termed as partially-connected BiBMST(PC-BiBMST)*** results h.ve confirmed th. advantages of th. PC-BiBMST codes over th. original BiBMST *** also present extensive simulation results to sh.w th. performance advantages of th. PC-BiBMST codes over th. spatially coupled low-density parity-ch.ck(SC-LDPC)codes,spatially coupled generalized LDPC(SC-GLDPC)codes,and th. original BiBMST codes in th. finite-length.regime.

关键词： block Markov superposition transmission(BMST) protograph.based extrinsic information transfer(PEXIT) capacity-approach.ng codes spatial coupling