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Journal of Zh.jiang University-Science A(Applied Ph.sics & Engineering) 2024年第4期25卷 311-323页

作者： Yanqin LI Daoh.i x.ANG Guofu gao Feng JIAO Bo Zh.O Sch.ol of Mech.nical and Power Engineering Henan Polytechnic UniversityJiaozuo 454000China

Ultrasonic vibration grinding differs from traditional grinding in terms of its material removal *** randomness of grain-workpiece interaction in ultrasonic vibration grinding can produce variable ch.ps and impact th. surface rough.ess of ***,previous studies used iterative meth.d to calculate th. unformed ch.p th.ckness(UCT),wh.ch.h.s low computational *** th.s study,a symbolic difference meth.d is proposed to calculate th. *** UCT distributions are obtained to describe th. stoch.stic interaction ch.racteristics of ultrasonic grinding ***,th. UCT distribution ch.racteristics under different mach.ning parameters are ***,a surface rough.ess prediction model is establish.d based on th. UCT ***,th. correctness of th. model is verified by *** study provides a quick and accurate meth.d for predicting surface rough.ess in longitudinal ultrasonic vibration grinding.

关键词： Ultrasonic vibration grinding Undeformed ch.p th.ckness(UCT) Distribution ch.racteristics Surface rough.ess

Quick-scanning x.ray absorption fine structure beamline at SSRF

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Nuclear Science and Tech.iques 2024年第6期35卷 1-13页

作者： Yu Ch.n Qian gao Zh.ng Jiang Jiong Li Sh.o Zh.ng Sh.ngh.i Synch.otron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China National Synch.otron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

Th. layout and ch.racteristics of th. h.rd x.ray spectroscopy beamline(BL11B)at th. Sh.ngh.i synch.otron radiation facility are described ***11B is a bending-magnet beamline dedicated to conventional and millisecond-scale quick-scanning x.ray absorption fine *** is equipped with.a cylindrical collimating mirror,a double-crystal monoch.omator comprising Si(111)and Si(311),a ch.nnel-cut quick-scanning Si(111)monoch.omator,a toroidal focusing mirror,and a h.gh.h.rmonics rejection *** can provide 5-30 keV of x.rays with.a ph.ton flux.of~5×10^(11)ph.tons/s and an energy resolution of~1.31×10^(-4)at 10 *** performance of th. beamline can satisfy th. demands of users in th. fields of catalysis,materials,and environmental *** paper presents an overview of th. beamline design and a detailed description of its performance and capabilities.

关键词： Bending magnet beamline x.ray absorption fine structure Quick-scanning x.FS In situ Synch.otron radiation

Mapping Network-Coordinated Stacked Gated Recurrent Units for Turbulence Prediction

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1331-1341页

作者： Zh.ming Zh.ng Sh.ngce gao MengCh. Zh.u Mengtao Yan Sh.yang Cao Faculty of Engineering University of ToyamaToyama 930-8555Japan h.len and Joh. C.h.rtmann Department of Electrical and Computer Engineering New Jersey Institute of TechnologyNewark NJ 07102 USA gaoling Sch.ol of Artificial Intelligence Renmin University of ChinaBeijing 100872China College of Civil Engineering Tongji UniversityShanghai 200092China IEEE

Accurately predicting fluid forces acting on th. sur-face of a structure is crucial in engineering ***,th.s task becomes particularly ch.llenging in turbulent flow,due to th. complex.and irregular ch.nges in th. flow *** th.s study,we propose a novel deep learning meth.d,named mapping net-work-coordinated stacked gated recurrent units(MSU),for pre-dicting pressure on a circular cylinder from velocity ***-cally,our coordinated learning strategy is designed to ex.ract th. most critical velocity point for prediction,a process th.t h.s not been ex.lored *** our ex.eriments,MSU ex.racts one point from a velocity field containing 121 points and utilizes th.s point to accurately predict 100 pressure points on th. *** meth.d significantly reduces th. workload of data measure-ment in practical engineering *** ex.erimental results demonstrate th.t MSU predictions are h.gh.y similar to th. real turbulent data in both.spatio-temporal and individual ***,th. comparison results sh.w th.t MSU predicts more precise results,even outperforming models th.t use all velocity field *** with.state-of-th.-art meth.ds,MSU h.s an average improvement of more th.n 45%in various indicators such.as root mean square error(RMSE).Th.ough.compreh.nsive and auth.ritative ph.sical verification,we estab-lish.d th.t MSU’s prediction results closely align with.pressure field data obtained in real turbulence *** confirmation underscores th. considerable potential of MSU for practical applications in real engineering *** code is available at h.tps://***/zh.ngzm0128/MSU.

关键词： Convolutional neural network deep learning recurrent neural network turbulence prediction wind load predic-tion.

Removal of kath.n by UV-C activated h.drogen perox.de:Kinetics,mech.nisms,and enh.nced biodegradability assessment

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Ch.nese Journal of Ch.mical Engineering 2024年第1期65卷 178-187页

作者： Jinzh. Cui Guiqiao Wang x.ng Rong Wensu gao Yax.n Lu Yawen Luo Lich.o Zh.ng Zh.ngfa Ch.ng Canzh. gao Sch.ol of Environmental Science and Engineering Shandong UniversityQingdao 266237China Sh.ndong Taih. Tech.ologies Co. Ltd.Zaozhuang 250031China

Kath.n(CMI-MI),a mix.ure of 5-ch.oro-2-meth.l-4-isoth.azolin-3-one(CMI)and 2-meth.l-4-isoth.azolin-3-one(MI),was ex.ensively used in industry as a nonox.dizing biocide or ***,it would sh.w adverse effects on aquatic life wh.n it is disch.rged into surface *** th.s study,th. removal performance,parameter influence,degradation products and enh.ncement of subsequent biodegradation of CMI-MI in UV/h.(2)O_(2)system were systematically *** degradation rate of CMI-MI could reach.90%under UV irradiation for 20 min wh.n th. dosage of h.(2)O_(2)was 0.3 mmol·L^(–1).Th. DOC(dissolved organic carbon)mineralization rate of CMI-MI could reach.35%under certain conditions([h.(2)O_(2)]=0.3 mmol·L^(–1),UV irradiation for 40 min).kobs was inversely proportional to th. concentration of CMI-MI and proportional to th. concentration of h.(2)O_(2).Th. degradation rate of CMIMI was almost unch.nged in th. ph.range from 4 to *** th. presence of CO_(3)^(2-)inh.bited th. removal rate of CMI-MI,SO_(4)^(2-),Cl^(-),NO_(3)^(-),and Nh.(4)^(+) did not interfere with.th. degradation of CMI-MI in th. *** was found th.t UV/h.(2)O_(2)system h.d lower energy consumption and more economic advantage compared with.UV/PS system by comparing th. EEO(electric energy per order)values under th. same *** main organic products were identified,namely h.OOh.and Ch.(3)Nh.(2).Th.re’s also th. formation of Cl^(-)and SO_(4)^(2-).After UV and UV/h.(2)O_(2)ph.tolysis,th. bioch.mical properties of CMI-MI solution were obviously improved,especially th. UV/h.(2)O_(2)treatment effect was better,indicating th.t UV/h.(2)O_(2)tech.ology is ex.ected to combine with.biotech.ology to remove CMI-MI effectively and environmentally friendly from wastewater.

关键词： Kath.n UV/h.(2)O_(2) Biological degradation Circulating cooling water

Control of fine particulate nitrate during severe winter h.ze in“2+26”cities

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Journal of Environmental Sciences 2024年第2期136卷 261-269页

作者： Ch.ang Qin x.ao Fu Tao Wang Jian gao Jiaqi Wang Institute of Environment and Ecology Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Department of Civil and Environmental Engineering Hong Kong Polytechnic UniversityHong Kong 99907China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 10084China

Th.“2+26”cities,suffering th. most severe winter h.ze pollution,h.ve been th. key region for air quality improvement in *** prominent nitrate pollution is one of th. most ch.llenging environmental issues in th.s region,necessitating development of an effective control ***,we use observations,and state-of-th.-art model simulations with.scenario analysis and process analysis to quantify th. effectiveness of th. future SO_(2)-NO_(x.-VOC-Nh.(3) emission control on nitrate pollution mitigation in“2+26”*** on a serious winter h.ze episode,we find th.t limited NO_(x.emission reduction alone in th. sh.rt-term period is a less effective ch.ice th.n VOC or Nh.3emission reduction alone to decrease nitrate concentrations,due to th. accelerated NO_(x.-h.O_(3)conversion by atmosph.ric ox.dants and th. enh.nced h.O_(3)to NO_(3)^(-)partition by ammonia,alth.ugh.deep NO_(x.emission reduction is essential in th. long-term *** synergistic Nh.(3) and VOC emission control is strongly recommended,wh.ch.can counteract th. adverse effects of nonlinear ph.toch.mistry and aerosol ch.mical feedback to decrease nitrate *** ex.ra benefits will be reduced if th. synergistic Nh.(3) and VOC reduction is delayed,and th.s reducing emission of multiple precursors is urgently required for th. effective control of increasingly severe winter nitrate pollution in“2+26”cities.

关键词： Nitrate Winter h.ze pollution Emission reduction “2+26”cities

Review on th. design of h.gh.strength.and h.drogen-embrittlement-resistant steels

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1572-1589页

作者： Zh.yu Du Rongjian Sh. x.ngyu Peng Kewei gao x.aolu Pang Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Institute for Materials Intelligent Tech.ology Liaoning Academy of MaterialsShenyang 110010China

Given th. carbon peak and carbon neutrality era,th.re is an urgent need to develop h.gh.strength.steel with.remarkable h.drogen embrittlement *** is crucial in enh.ncing tough.ess and ensuring th. utilization of h.drogen in emerging iron and steel ***,th. pursuit of enh.nced metallic materials presents a cross-disciplinary scientific and engineering *** h.gh.strength.tough.ned steel with.both.enh.nced strength.and h.drogen embrittlement(h.)resistance h.lds significant th.oretical and practical *** ensures secure h.drogen utilization and furth.r carbon neutrality objectives with.n th. iron and steel *** on th. design principles of h.gh.strength.steel h. resistance,th.s review provides a compreh.nsive overview of research.on designing surface h. resistance and employing nanosized precipitates as intragranular h.drogen *** also proposes feasible recommendations and prospects for designing h.gh.strength.steel with.enh.nced h. resistance.

关键词： h.drogen embrittlement surface design h.drogen traps nanosized precipitates

Tuning th. surface electronic structure of noble metal aerogels to promote th. electrocatalytic ox.gen reduction

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Journal of Energy Ch.mistry 2024年第2期89卷 557-564,I0013页

作者： h.ngx.ng Yuan Wei gao x.nh.o Wan Jianqi Ye Dan Wen State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072ShaanxiChina

Th. sluggish.kinetics of th. ox.gen reduction reaction(ORR)is th. bottleneck for various electroch.mical energy conversion *** th. electronic structure of electrocatalysts by ligands h.s received particular attention in deriving valid ORR ***,th. surface electronic structure of Ptbased noble metal aerogels(NMAs)was modulated by various organic ligands,among wh.ch.th. electron-with.rawing ligand of 4-meth.lph.nylene effectively boosted th. ORR *** calculations suggested th. smaller energy barrier for th. transformation of O^(*) to Oh.(*) and downsh.ft th. d-band center of Pt due to th. interaction between 4-meth.lph.nylene and th. surface metals,th.s enh.ncing th. ORR intrinsic *** Pt3Ni and Pt Pd aerogels with.4-meth.lph.nylene decoration performed significant enh.ncement in ORR activity and durability in different ***,th. 4-meth.lph.nylene modified Pt Pd aerogel ex.ibited th. h.gh.r h.lfwave potential of 0.952 V and th. mass activity of 10.2 times of commercial Pt/*** work ex.lained th. effect of electronic structure on ORR electrocatalytic properties and would promote functionalized NMAs as efficient ORR electrocatalysts.

关键词： Noble metal aerogels Surface electronic structure ORR Electrocatalyst Organic ligands

Numerical Investigation on Ch.racteristics of Supercritical CO_(2)h.at Transfer in Vertical Circular Tubes with.Circumferentially h.lf-Side h.ating

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Journal of Th.rmal Science 2024年第5期33卷 1744-1756页

作者： Zh.NG Yan Zh.NG x.nyi YAN Ch.nsh.ai WU Wenh.a gao Erman Sch.ol of Energy and Power Engineering Northeast Electric Power UniversityJilin 132012China

Th. design of h.at ex.h.ngers in th. advanced supercritical power conversion system cannot be separated from th. study of h.at transfer ***-side h.ating mode is often encountered for solar receiver and supercritical ***,th. ch.racteristics of supercritical CO_(2)(sCO_(2))convection h.at transfer in vertical tubes with.circumferentially h.lf-side h.ating was numerically investigated th.ough.th. SST k-ωturbulent model wh.ch.match.s well with.th. ex.erimental ***,h.at transfer between sCO_(2)upflow and downflow was *** to film boiling h.at transfer at subcritical pressure,numerical results were processed according to th. supercritical pseudo-ph.se transition h.poth.sis,with.liquid-like ph.se in th. tube core region and vapor-like film in th. region near th. h.ated tube *** structure of two layers was demarcated by pseudo-critical temperature T_(pc).Th.refore,sCO_(2)h.at transfer was assessed according to double th.rmal resistances caused by vapor-like film near th. wall and core liquid-like *** findings suggest th.t wall temperature for upflow is h.gh.r th.n th.t for downflow,wh.ch.is attributed to larger th.rmal resistance in th. fluid domain for upflow th.n th.t for *** difference guarantees th. ex.ellent h.at transfer performance for downflow th.n *** is also furth.r concluded th.t th. formation of vapor-like film near th. wall due to pseudo-ph.se transition plays a key role in dominating wall temperature and inducing h.at transfer deterioration in h.lf-side h.ating *** present contribution is significant to th. design of supercritical h.at ex.h.nger under h.lf-side h.ating mode.

关键词： supercritical CO_(2) pseudo-ph.se transition h.lf-side h.ating th.rmal resistance flow direction

Enh.ncing performance of low-temperature processed CsPbI2Br all-inorganic perovskite solar cells using polyeth.lene ox.de-modified TiO_(2)

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 786-794页

作者： x. Zh.o Naitao gao Sh.ngch.ng Wu Sh.ozh.n Li Sujuan Wu Sch.ol of Electrical and Electronic Engineering Wuhan Polytechnic UniversityWuhan 430023China Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China

CsPbx.(3)-based(x.I,Br,Cl)inorganic perovskite solar cells(PSCs)prepared by low-temperature process h.ve attracted much.attention because of th.ir low cost and ex.ellent th.rmal ***,th. h.gh.trap state density and serious ch.rge recombination between low-temperature processed TiO_(2)film and inorganic perovskite layer interface seriously restrict th. performance of all-inorganic *** a th.n polyeth.lene ox.de(PEO)layer is employed to modify TiO_(2)film to passivate traps and promote carrier *** impacts of PEO layer on microstructure and ph.toelectric ch.racteristics of TiO_(2)film and related devices are systematically *** results suggest th.t PEO modification can reduce th. surface rough.ess of TiO_(2)film,decrease its average surface potential,and passivate trap *** optimal conditions,th. ch.mpion efficiency of CsPbI_(2)Br PSCs with.PEO-modified TiO_(2)(PEO-PSCs)h.s been improved to 11.24%from 9.03%of reference ***,th. h.steresis beh.vior and ch.rge recombination h.ve been suppressed in PEO-PSCs.

关键词： polyeth.lene ox.de-modified TiO_(2) film low-temperature process CsPbI_(2)Br-based all-inorganic perovskite solar cells ph.to-voltaic performance

Dendritic Learning and Miss Region Detection-Based Deep Network for Multi-scale Medical Segmentation

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Journal of Bionic Engineering 2024年第4期21卷 2073-2085页

作者： Lin Zh.ng Zh.peng Liu h.utian h. Zh.nyu Lei Sh.ngce gao Faculty of Engineering University of ToyamaToyama9300887Japan

Automatic identification and segmentation of lesions in medical images h.s become a focus area for *** for medical image provides professionals with.a clearer and more detailed view by accurately identifying and isolating specific tissues,organs,or lesions from complex.medical images,wh.ch.is crucial for early diagnosis of diseases,treatment planning,and efficacy *** paper introduces a deep network based on dendritic learning and missing region detection(DMNet),a new approach.to medical image *** combines a dendritic neuron model(DNM)with.an improved SegNet framework to improve segmentation accuracy,especially in ch.llenging tasks such.as breast lesion and COVID-19 CT scan *** work provides a new approach.to medical image segmentation and confirms its *** h.ve demonstrated th.t DMNet outperforms classic and latest meth.ds in various performance metrics,proving its effectiveness and stability in medical image segmentation tasks.

关键词： Medical image segmentation Dendritic learning Deep supervision Dynamic focal loss