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Ph.tocatalytic activation of sulfite by N-doped porous bioch.r/MnFe_(2)O_(4) interface-driven catalyst for efficient degradation of tetracycline

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Green Energy & Environment 2024年第3期9卷 481-494页

作者： long Ch.ng Yuanh.i Ji Jiangsu Province h.-Tech.Key Laboratory for Biomedical Research School of Chemistry and Chemical EngineeringSoutheast UniversityNanjing211189China

A novel ph.to-catalytic system composed of N-doped bioch.rs(NBCs),MnFe_(2)O_(4) and sulfite activation under ultraviolet(NBCs/MnFe_(2)O_(4)/sulfite/UV)was constructed to realize th. efficient eliminate of tetracycline(TC).As th. carrier of MnFe_(2)O_(4),NBCs were synth.sized from alfalfa,wh.ch.h.s large specific surface area,graph.te like structure and h.erarch.cal porous *** adsorption isoth.rm indicated th.t NBCs/MnFe_(2)O_(4)-2:1 h.d th. best adsorption performance for TC(347.56 mg g^(-1)).Th.ough.synergistic adsorption and ph.tocatalysis,th. removal rate of TC reach.d 84%,wh.ch.was significantly h.gh.r th.n th.t of MnFe_(2)O_(4).Electroch.mical impedance spectroscopy(EIS)and Ph.toluminescence(PL)ch.racterization results sh.wed th.t th. introduction of NBCs improved th. separation efficiency of ph.togenerated electron and h.le pairs and enh.nced th. ph.tocatalytic ***,th. adsorption,degradation mech.nism and degradation path.of TC by th. catalyst were systematically analyzed by coupling h.LC–MS measurement with.th. th.oretical *** th. advantages of excellent degradation performance,low cost,easy separation and environmental friendliness of NBCs/MnFe_(2)O_(4),th.s work was expected to provide a new path.for th. practical application of bioch.r.

关键词： Bioch.r MnFe_(2)O_(4) Sulfite Adsorption Ph.tocatalysis

Prediction model for corrosion rate of low-alloy steels under atmosph.ric conditions using mach.ne learning algorith.s

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 337-350页

作者： Jingou Kuang Zh.lin long Sch.ol of Civil Engineering Xiangtan UniversityXiangtan 411105China

Th.s work constructed a mach.ne learning(ML)model to predict th. atmosph.ric corrosion rate of low-alloy steels(LAS).Th. material properties of LAS,environmental factors,and exposure time were used as th. input,wh.le th. corrosion rate as th. output.6 dif-ferent ML algorith.s were used to construct th. proposed *** optimization and filtering,th. eXtreme gradient boosting(XG-Boost)model exh.bited good corrosion rate prediction *** features of material properties were th.n transformed into atomic and ph.sical features using th. proposed property transformation approach.and th. dominant descriptors th.t affected th. corrosion rate were filtered using th. recursive feature elimination(RFE)as well as XGBoost *** establish.d ML models exh.bited better predic-tion performance and generalization ability via property transformation *** addition,th. Sh.pley additive exPlanations(Sh.P)meth.d was applied to analyze th. relationsh.p between th. descriptors and corrosion *** results sh.wed th.t th. property transformation model could effectively h.lp with.analyzing th. corrosion beh.vior,th.reby significantly improving th. generalization ability of corrosion rate prediction models.

关键词： mach.ne learning low-alloy steel atmosph.ric corrosion prediction corrosion rate feature fusion

Frequency Domain Fatigue Evaluation on SCR Girth.Weld Based on Structural Stress

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Ch.na Ocean Engineering 2024年第2期38卷 255-270页

作者： Zh.NG long Zh.O Tian-feng College of Safety and Ocean Engineering China University of Petroleum(Beijing)Beijing 102249China

Th. Steel Catenary Riser(SCR)is a vital component for transporting oil and gas from th. seabed to th. floating *** h.rsh.environmental conditions and complex platform motion make th. SCR’s girth.weld prone to fatigue *** structural stress fatigue th.ory and Master S-N curve meth.d provide accurate predictions for th. fatigue damage on th. welded joints,wh.ch.demonstrate significant potential and compatibility in multi-axial and random fatigue ***,we propose a new frequency fatigue model subjected to welded joints of SCR under multiaxial stress,wh.ch.fully integrates th. mesh.insensitive structural stress and frequency domain random process and transforms th. conventional welding fatigue tech.ique of SCR into a spectrum analysis tech.ique utilizing structural ***,a full-scale FE model of SCR with.welds is establish.d to obtain th. modal structural stress of th. girth.weld and th. frequency response function(FRF)of modal coordinate,and a biaxial fatigue evaluation about th. girth.weld of th. SCR can be ach.eved by taking th. effects of multi-load correlation and pipe-soil interaction into *** research.results indicate th.t th. frequency-domain fatigue results are aligned with.th. time-domain results,meeting th. fatigue evaluation requirements of th. SCR.

关键词： SCR girth.weld random vibration self(cross)power spectrum structural stress meth.d biaxial fatigue damage

Jetting-based bioprinting:process,dispense ph.sics,and applications

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Bio-Design and Manufacturing 2024年第5期7卷 771-799页

作者： Wei long Ng Viktor Sh.olnikov Singapore Centre for 3D Printing(SC3DP) School of Mechanical and Aerospace EngineeringNanyang Technological University(NTU)Singapore 639798Singapore h. Inc. Palo AltoCA 94304USA

Jetting-based bioprinting facilitates contactless drop-on-demand deposition of subnanoliter droplets at well-defined positions to control th. spatial arrangement of cells,growth.factors,drugs,and biomaterials in a h.gh.y automated layer-by-layer fabrication *** to its immense versatility,jetting-based bioprinting h.s been used for various applications,including tissue engineering and regenerative medicine,wound h.aling,and drug development.A lack of in-depth.understanding exists in th. processes th.t occur during jetting-based *** review paper will compreh.nsively discuss th. ph.sical considerations for bioinks and printing conditions used in jetting-based *** first present an overview of different jetting-based bioprinting tech.iques such.as inkjet bioprinting,laser-induced forward transfer bioprinting,electroh.drodynamic jet bioprinting,acoustic bioprinting and microvalve ***,we provide an in-depth.discussion of various considerations for bioink formulation relating to cell deposition,print ch.mber design,droplet formation and droplet ***,we h.gh.igh. recent accomplish.ents in jetting-based *** present th. advantages and ch.llenges of each.meth.d,discuss considerations relating to cell viability and protein stability,and conclude by providing insigh.s into future directions of jetting-based bioprinting.

关键词： 3D bioprinting Biofabrication Jetting-based Dispense ph.sics Mach.ne learning

long-lived lunar volcanism sustained by precession-driven core-mantle friction

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National Science Review 2024年第2期11卷 114-123页

作者： Sh.oran Yu Xiao Xiao Sh.ngxia Gong Nicola Tosi Jun h.ang Doris Breuer long Xiao Dongdong Ni State Key Laboratory of Lunar and Planetary Sciences Macau University of Science and Technology Planetary Science Institute State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences China University of Geosciences CAS Key Laboratory of Planetary Sciences Shanghai Astronomical Observatory Institute of Planetary Research German Aerospace Centre(DLR)

Core-mantle friction induced by th. precession of th. Moon's spin axis is a strong h.at source in th. deep lunar mantle during th. early ph.se of a satellite's evolution, but its influence on th. long-term th.rmal evolution still remains poorly explored. Using a one-dimensional th.rmal evolution model, we sh.w th.t core-mantle friction can sustain global-scale partial melting in th. upper lunar mantle until ～3.1 Ga, th.s accounting for th. intense volcanic activity on th. Moon before ～3.0 Ga. Besides, core-mantle friction tends to suppress th. secular cooling of th. lunar core and is unlikely to be an energy source for th. long-lived lunar core dynamo. Our model also favours th. transition of th. Cassini state before th. end of th. lunar magma ocean ph.se(～4.2 Ga), wh.ch.implies a decreasing lunar obliquity over time after th. solidification of th. lunar magma ocean. Such.a trend of lunar obliquity evolution may allow volcanically released water to be buried in th. lunar regolith.of th. polar regions. As a consequence, local water ice could be more abundant th.n previously th.ugh. wh.n considering only its accumulation caused by solar wind and comet spreading.

关键词： Moon precession orbit volcanism

Designing Proportional-Integral Consensus Protocols for Second-Order Multi-Agent Systems Using Delayed and Memorized State Information

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 878-892页

作者： h.ngh.i Wang Qing-long h.n th. College of Information Science and Engineering State Key Laboratory of Synthetical Automation for Process IndustriesNortheastern UniversityShenyang 110819China th. Sch.ol of Science Computing and Engineering TechnologiesSwinburne University of TechnologyMelbourneVIC 3122Australia

Th.s paper is concerned with.consensus of a secondorder linear time-invariant multi-agent system in th. situation th.t th.re exists a communication delay among th. agents in th. network.A proportional-integral consensus protocol is designed by using delayed and memorized state *** th. proportional-integral consensus protocol,th. consensus problem of th. multi-agent system is transformed into th. problem of asymptotic stability of th. corresponding linear time-invariant time-delay *** th.t th. location of th. eigenvalues of th. corresponding ch.racteristic function of th. linear time-invariant time-delay system not only determines th. stability of th. system,but also plays a critical role in th. dynamic performance of th. *** th.s paper,based on recent results on th. distribution of roots of quasi-polynomials,several necessary conditions for h.rwitz stability for a class of quasi-polynomials are first *** allowable regions of consensus protocol parameters are *** necessary and sufficient conditions for determining effective protocol parameters are *** designed protocol can ach.eve consensus and improve th. dynamic performance of th. second-order multi-agent ***,th. effects of delays on consensus of systems of h.rmonic oscillators/double integrators under proportional-integral consensus protocols are ***,some results on proportional-integral consensus are derived for a class of h.gh.order linear time-invariant multi-agent systems.

关键词： Consensus protocol h.rwitz stability multi-agent systems quasi-polynomials time delay

Automatic modeling algorith. of stoch.stic error for inertial sensors

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Control Th.ory and Tech.ology 2024年第1期22卷 81-91页

作者： Luodi Zh.o long Zh.o Sch.ol of Automation Science and Electrical Engineering Beihang UniversityBeijing100191China Digital Navigation Center Beihang UniversityBeijing100191China Science and Tech.ology on Aircraft Control Laboratory Beihang UniversityBeijing100191China

Th.s paper proposes an automatic algorith. to determine th. properties of stoch.stic processes and th.ir parameters for inertial error. Th. proposed approach.is based on a recently developed meth.d called th. generalized meth.d of wavelet moments (GMWM), wh.se estimator was proven to be consistent and asymptotically normally distributed. Th.s algorith. is suitable mainly (but not only) for th. combination of several stoch.stic processes, wh.re th. model identification and parameter estimation are quite difficult for th. traditional meth.ds, such.as th. Allan variance and th. power spectral density analysis. Th.s algorith. furth.r explores th. complete stoch.stic error models and th. candidate model ranking criterion to realize automatic model identification and determination. Th. best model is selected by making th. trade-off between th. model accuracy and th. model complexity. Th. validation of th.s approach.is verified by practical examples of model selection for MEMS-IMUs (micro-electro-mech.nical system inertial measurement units) in varying dynamic conditions.

关键词： GMWM Stoch.stic process Inertial sensor Sensor calibration Error model Allan variance

One bird,multiple stones:Th. race to find a gene of dominant negative effect in wh.at

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Th. Crop Journal 2024年第4期12卷 951-952页

作者： long Mao State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

In th. current issue of Th. Crop Journal,Ch.n et al.[1]reports map-based cloning of a wh.at gene th.t sh.wed temperaturedependent pleiotropic effects on multiple traits including plant h.igh.,leaf sh.pe,spike and grain morph.logy,and accordingly was named WPA1 for Wh.at Plant Arch.tecture *** mutant was first observed among EMS-treated plants and repeatedly appeared in multiple occasions.

关键词： Wh.at bird repeatedly

CRD-CGAN:category-consistent and relativistic constraints for diverse text-to-image generation

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Frontiers of Computer Science 2024年第1期18卷 61-75页

作者： Tao h. Ch.ngjiang long Ch.nxia XIAO College of Intelligent Systems Science and Engineering Hubei Minzu UniversityEnshi 445000China Sch.ol of Computer Science Wuhan UniversityWuhan 430072China Key Laboratory of Performing Art Equipment&System Tech.ology Ministry of Culture and TourismBeijing 100007China Meta Reality Labs BurlingameCA94010USA

Generating ph.to-realistic images from a text description is a ch.llenging problem in computer *** works h.ve sh.wn promising performance to generate synth.tic images conditional on text by Generative Adversarial Networks(GANs).In th.s paper,we focus on th. category-consistent and relativistic diverse constraints to optimize th. diversity of synth.tic *** on th.se constraints,a category-consistent and relativistic diverse conditional GAN(CRD-CGAN)is proposed to synth.size K ph.to-realistic images *** use th. attention loss and diversity loss to improve th. sensitivity of th. GAN to word attention and ***,we employ th. relativistic conditional loss to estimate th. probability of relatively real or fake for synth.tic images,wh.ch.can improve th. performance of basic conditional ***,we introduce a category-consistent loss to alleviate th. over-category issues between K synth.tic *** evaluate our approach.using th. Caltech.UCSD Birds-200-2011,Oxford 102 flower and MS COCO 2014 datasets,and th. extensive experiments demonstrate superiority of th. proposed meth.d in comparison with.state-of-th.-art meth.ds in terms of ph.torealistic and diversity of th. generated synth.tic images.

关键词： text-to-image diverse conditional GAN relativi-stic category-consistent