检索结果-南通市图书馆

Defence Technology（防务技术） 2024年第1期31卷 537-543页

作者： Huang Hailong Mohsen Eskandar. Andr.y v.Sav.in Wei ni The Depar.ment of Aer.nautical and Av.ation Engineer.ng The Hong Kong Polytechnic UniversityHong KongChina School of Electr.cal Engineer.ng and Telecommunications University of New South WalesSydney2052Australia Data61 CSIROAustralia

We consider.a scenar.o wher. an unmanned aer.al v.hicle(UAv.,a typical unmanned aer.al system(UAS),tr.nsmits confidential data to a mov.ng gr.und tar.et in the pr.sence of multiple *** fr.endly r.configur.ble intelligent sur.aces(r.Ss) help to secur. the UAv.tar.et communication and impr.v. the ener.y efficiency of the *** for.ulate an optimization pr.blem to minimize the ener.y consumption of the UAv.subject to the mobility constr.int of the UAv.and that the achiev.ble secr.cy r.te at the tar.et is ov.r.a giv.n *** pr.sent an online planning method following the fr.mewor. of model pr.dictiv. contr.l(MPC) to jointly optimize the motion of the UAv.and the configur.tions of the *** effectiv.ness of the pr.posed method is v.lidated v.a computer.simulations.

关键词： Unmanned aer.al systems(UASs) Unmanned aer.al v.hicle(UAv. Communication secur.ty Eav.s-dr.pping r.configur.ble intelligent sur.aces(r.S) Autonomous nav.gation and placement Path planning Model pr.dictiv. contr.l

r.tional Design of r.ddlesden-Popper.Per.v.kite Fer.ites as Air.Electr.de for.Highly Activ. and Dur.ble r.v.r.ible Pr.tonic Cer.mic Cells

在线全文

学校读者我要写书评

暂无评论

Nano-Micr. Letter. 2024年第9期16卷 308-324页

作者： Na Yu Idr.s Temitope Bello Xi Chen Tong Liu Zheng Li Yufei Song Meng ni Depar.ment of Building and r.al Estate Research Institute for Sustainable Urban Development(RISUD)and Research Institute for Smart Energy(RISE)The Hong Kong Polytechnic UniversityHung HomKowloonHong KongPeople’s Republic of China The Hong Kong Polytechnic Univ.r.ity Shenzhen r.sear.h Institute Shenzhen 518057GuangdongPeople’s Republic of China Depar.ment of Mechanical and Aer.space Engineer.ng The Hong Kong University of Science and TechnologyClear Water BayHong KongPeople’s Republic of China

r.v.r.ible pr.tonic cer.mic cells(r.PCCs)hold pr.mise for.efficient ener.y stor.ge,but their.pr.cticality is hinder.d by a lack of high-per.or.ance air.electr.de ***-Popper.per.v.kite Sr.(3)Fe_(2)O_(7−δ)(SF)exhibits super.or.pr.ton uptake and r.pid ionic conduction,boosting ***,excessiv. pr.ton uptake dur.ng r.PCC oper.tion degr.des SF’s cr.stal str.ctur.,impacting *** study intr.duces a nov.l A/B-sites co-substitution str.tegy for.modifying air.electr.des,incor.or.ting Sr.deficiency and Nb-substitution to cr.ate Sr.(2.8)Fe_(1.8)Nb_(0.2)O_(7−δ)(D-SFN).Nb stabilizes SF’s cr.stal,cur.ing excessiv. phase for.ation,and Sr.deficiency boosts oxygen v.cancy concentr.tion,optimizing oxygen *** D-SFN electr.de demonstr.tes outstanding activ.ty and dur.bility,achiev.ng a peak power.density of 596 mW cm^(−2)in fuel cell mode and a cur.ent density of−1.19 A cm^(−2)in electr.lysis mode at 1.3 v.650℃,with excellent cycling *** appr.ach holds the potential for.adv.ncing r.bust and efficient air.electr.des in r.PCCs for.r.newable ener.y stor.ge.

关键词： r.v.r.ible pr.tonic cer.mic cells Air.electr.de r.ddlesden-Popper.per.v.kite Hydr.tion Oxygen r.duction r.action

A r.v.ew of contr.l str.tegies for.pr.ton exchange membr.ne(PEM)fuel cells and water.electr.lyser.:Fr.m automation to autonomy

在线全文

学校读者我要写书评

暂无评论

Energy and AI

Ener.y and AI 2024年第3期17卷 470-486页

作者： Jiahao Mao Zheng Li Jin Xuan Xinli Du Meng ni Lei Xing School of Chemistr. and Chemical Engineer.ng University of SurreyGU27XHUnited Kingdom Depar.ment of Building and r.al Estate Research Institute for Sustainable Urban Development(RISUD)&Research Institute for Smart Energy(RISE)The Hong Kong Polytechnic UniversityHung HomKowloonChina Depar.ment of Mechanical and Aer.space Engineer.ng Brunel University LondonUB83PHUnited Kingdom

Pr.ton exchange membr.ne (PEM) based electr.chemical systems hav. the capability to oper.te in fuel cell (PEMFC) and water.electr.lyser.(PEMWE) modes, enabling efficient hydr.gen ener.y utilisation and gr.en hydr.gen pr.duction. In addition to the essential cell stacks, the system of PEMFC or.PEMWE consists of four.sub-systems for.managing gas supply, power. ther.al, and water. r.spectiv.ly. Due to the system's complexity, ev.n a small fluctuation in a cer.ain sub-system can r.sult in an unexpected r.sponse, leading to a r.duced per.or.ance and stability. To impr.v. the system's r.bustness and r.sponsiv.ness, consider.ble effor.s hav. been dedicated to dev.loping adv.nced contr.l str.tegies. This paper.compr.hensiv.ly r.v.ews v.r.ous contr.l str.tegies pr.posed in liter.tur., r.v.aling that tr.ditional contr.l methods ar. widely employed in PEMFC and PEMWE due to their.simplicity, yet they suffer.fr.m limitations in accur.cy. Conv.r.ely, adv.nced contr.l methods offer.high accur.cy but ar. hinder.d by poor.dynamic per.or.ance. This paper.highlights the r.cent adv.ncements in contr.l str.tegies incor.or.ting machine lear.ing algor.thms. Additionally, the paper.pr.v.des a per.pectiv. on the futur. dev.lopment of contr.l str.tegies, suggesting that hybr.d contr.l methods should be used for.futur. r.sear.h to lev.r.ge the str.ngth of both sides. Notably, it emphasises the r.le of ar.ificial intelligence (AI) in adv.ncing contr.l str.tegies, demonstr.ting its significant potential in facilitating the tr.nsition fr.m automation to autonomy.

关键词： PEMFC PEMWE Contr.l Management system AI

ENSO Index v.r.ations and Links with Solar.and v.lcanic Activ.ty

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Natur.l Science 2024年第4期16卷 25-44页

作者： v.lentina v. Zhar.ov. Ir.na v.siliev. Depar.ment of MPEE Faculty of Engineering and Environment University of Northumbria Newcastle upon Tyne NE UK Zv. r.sear.h Enter.r.se Ltd. London UK Depar.ment of Solar.Physics Main Astronomical Observatory Kyiv Ukraine

In this paper. we inv.stigated the Oceanic niño Index (Oni), for.simplicity called in this paper.an El nino Souther. Oscillation (ENSO) index in 1950-2023 by applying the wav.let spectr.l tr.nsfor. and the IBM SPSS cor.elations analysis. Oni follows the thr.e months’ cur.ent measur.ments of the av.r.ge temper.tur. of the sea sur.ace in the East-Centr.l tr.pical par. of the Pacific Ocean near.y the inter.ational line of the date change ov.r.the av.r.ge sea sur.ace temper.tur. ov.r.the past 30 year.. The ENSO index is found to hav. a str.ng (>87%) cor.elation with the Global Land-Ocean Temper.tur. (GLOT). The scatter.plots of the ENSO-GLOT cor.elation with the linear.and cubic fits hav. shown that the ENSO index is better.fit by the cubic polynomial incr.asing pr.por.ionally to a cubic power.of the GLOT v.r.ations. The wav.let analysis allowed us to detect the two key per.ods in the ENSO (Oni) index: 4 - 5 year. and 12 year.. The smaller.per.od of 4.5 year. can be linked to the motion of tectonic plates while the lar.er.per.od of 12 year. is shown to hav. a noticeable cor.elation of 25% with fr.quencies of the under.ater.(submar.ne) v.lcanic er.ptions in the ar.as with ENSO occur.ences. Not withholding any local ter.estr.al factor. consider.d to contr.bute to the ENSO occur.ences, we inv.stigated the possibility of the v.lcanic er.ptions causing ENSO to be also induced by the tidal for.es of Jupiter.and Sun showing the cor.elation of the under.ater.v.lcanic er.ption fr.quency with the Jupiter.Ear.h distances to be 12% and with the Sun-Ear.h distances, induced by the solar.iner.ial motion, in Januar., when the Ear.h is tur.ed to the Sun with the souther. hemispher. wher. the ENSO occur., to become 15%. Hence, the under.ater.v.lcanic er.ptions induced by tidal for.es of Jupiter.and Sun can be the essential additional factor. imposing this 12 year.per.od of the ENSO (Oni) index v.r.ations.

关键词： Sun: Magnetic Field Sun: Solar.Activ.ty Sun: Iner.ial Motion Ear.h: Temper.tur. Ear.h: Sea Lev.l Ear.h: Ice Ar.a

Highly disper.iv. tetr.hedr.l v.nadium species on pur. silica ZSM-12 zeolite boosting the selectiv. oxidation of cyclohexane into cyclohexanone

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistr. 2024年第7期67卷 2206-2214页

作者： Menglin Xie Ting Li Chao Wu Xiaoling Liu Jinling ni Siqin Yao Yu Zhou Shibo Xi Jun Wang State Key Labor.tor. of Mater.als-Or.ented Chemical Engineer.ng College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Institute of Sustainability for.Chemicals Energy and Environment(ISCE2)Agency for ScienceTechnology and Research(A*STAR)Singapore 627833Republic of Singapore College of Mater.als Science and Engineer.ng Sichuan UniversityChengdu 610065China

The selectiv. oxidation of cyclohexane is a pr.mising gr.en r.ute for.the pr.duction of KA oil(cyclohexanol and cyclohexanone),but r.mains a huge challenge to design high-per.or.ing heter.geneous catalysts under.mild ***,a pur. silica ZSM-12(MTW topology)zeolite was applied as the suppor. to immobilize highly disper.iv. tetr.hedr.lly coor.inated v.nadium(v.species and the constr.cted catalyst 1%v.SZ-12 exhibited high efficiency in the fast and selectiv. oxidation of cyclohexane into cyclohexanone with H_(2)O_(2).The r.action completed within 30 s,affor.ing the selectiv.ty of 99%towar.s cyclohexanone and the extr.mely high tur.ov.r.fr.quency(TOF)of 5,891 h^(-1).1%v.SZ-12 was facilely r.used with stable activ.ty and feasibly extended to the oxidation of v.r.ous cyclohexane *** one-dimensional 12-member.d r.ng micr.channels contr.buted to the for.ation and accessibility of tetr.hedr.lly coor.inated high v.lent v.+species as the r.bust activ. center.,which activ.ted H_(2)O_(2) to gener.te v.O–O·,the activ. oxygen species for.the electr.philic attack on cyclohexane to pr.duce cyclohexanone as the sole pr.duct.

关键词： zeolite metal doping cyclohexane oxidation heter.geneous catalysis

Sociodemogr.phic deter.inants associated with br.astfeeding in ter. infants with low bir.h weight in Latin Amer.can countr.es

在线全文

学校读者我要写书评

暂无评论

Wor.d Jour.al of Clinical Pediatr.cs 2024年第1期13卷 141-149页

作者： Car.os Jav.er.Av.ndaño-v.squez Magda Liliana v.llamizar.Osor.o Claudia Jazmin niño-Peñar.nda Judith Medellín-Olaya Nadia Car.lina r.ina-Gamba School of Nur.ing Antonio Nariño UniversityBogotá111511Colombia School of Nur.ing Universidad Cooperativa de ColombiaBucaramanga 102536Colombia School of Nur.ing Universidad Nacional de ColombiaColombia 111511Colombia

BACKGr.UND A pr.gr.ssiv. decr.ase in exclusiv. br.astfeeding(BF)is obser.0}d in Latin Amer.ca and the Car.bbean compar.d with global *** possibility of being br.astfed and continuing BF for.6 months is lower.in low bir.h weight than in healthy-weight *** To identify factor. associated with BF maintenance and pr.motion,with par.icular.attention to low-and middle-income countr.es,by studying geogr.phic,socioeconomic,and indiv.dual or.neonatal health *** A scoping r.v.ew was conducted in 2018 using the conceptual model of social deter.inants of health published by the Commission on Equity and Health Inequalities in the United *** extr.cted data with common char.cter.stics wer. synthesized and categor.zed into two main themes:(1)Sociodemogr.phic factor. and pr.ximal deter.inants inv.lv.d in the initiation and maintenance of BF in low-bir.h-weight ter. infants in Latin Amer.ca;and(2)indiv.dual char.cter.stics r.lated to the self-efficacy capacity for.BF maintenance and adher.nce in low-bir.h-weight ter. *** This study identified mater.al age,educational lev.l,mater.al economic capacity,social str.tum,exposur. to BF substitutes,access to BF infor.ation,and quality of health ser.0}ces as mediator. for.maintaining *** Indiv.dual self-efficacy factor. that enable BF adher.nce in at-r.sk populations should be analyzed for.better.health outcomes.

关键词： Br.astfeeding Low bir.h weight Latin Amer.ca Self-efficacy Social deter.inants of health

High-capacity dilithium hydr.quinone cathode mater.al for.lithium-ion batter.es

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science r.v.ew 2024年第6期11卷 206-213页

作者： Yong Lu Haoqin Han Zhuo Yang Youxuan ni Zhicheng Meng Qiu Zhang Hao Wu Weiwei Xie Zhenhua Yan Jun Chen Fr.ntier. Science Center.for.New Or.anic Matter Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) State Key Laboratory of Advanced Chemical Power SourcesCollege of ChemistryNankai University

Lithiated or.anic cathode mater.als show gr.at pr.mise for.pr.ctical applications in lithium-ion batter.es owing to their.Li-r.ser.0}ir.char.cter.stics. Howev.r. the r.por.ed lithiated or.anic cathode mater.als still suffer.fr.m str.ct synthesis conditions and low capacity. Her. we r.por. a ther.al inter.olecular.r.ar.angement method without or.anic solv.nts to pr.par. dilithium hydr.quinone（Li2Q）, which deliv.r. a high capacity of 323 m Ah g-1with an av.r.ge dischar.e v.ltage of 2.8 v. The r.v.r.ible conv.r.ion between or.hor.ombic Li2Q and monoclinic benzoquinone dur.ng char.e/dischar.e pr.cesses is r.v.aled by in situ X-r.y diffr.ction. Theor.tical calculations show that the unique Li–O channels in Li2Q ar. beneficial for.Li+ion diffusion. In situ ultr.v.olet-v.sible spectr. demonstr.te that the dissolution issue of Li2Q electr.des dur.ng char.e/dischar.e pr.cesses can be handled by separ.tor.modification, r.sulting in enhanced cycling stability. This wor. sheds light on the synthesis and batter. application of high-capacity lithiated or.anic cathode mater.als.

关键词： lithium-ion batter.es cathode mater.als lithiated or.anic mater.als dilithium hydr.quinone separ.tor.modification

Car.on-coated hybr.d cr.stals with fast electr.chemical r.action kinetics for.ultr.-stable and high-load sodium-ion batter.es

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

r.r. Metals 2024年第2期43卷 647-657页

作者： Chuan Ou Ming-Dong Tan Zhen-Bang Li Zhao-Jie Li Fei Tian Zheng-Ping Qiao Dan-ni Lei Cheng-Xin Wang State Key Labor.tor. of Optoelectr.nic Mater.als and Technologies School of Materials Science and EngineeringSun Yat-Sen UniversityGuangzhou510275China

Owing to its high theor.tical capacity and low cost,Sn has attr.cted significant attention in sodium-ion ***,the slow kinetics of electr.chemical r.actions and the r.pid decay of capacity r.sulting fr.m dr.stic changes in the v.lume of Sn,as well as per.istent side r.actions between Sn and the or.anic electr.lyte dur.ng the(de)sodium pr.cess,hav. limited its *** impr.v. the electr.chemical per.or.ance of Sn-based mater.als,the bottom-up method is nor.ally used to pr.par. car.on-coated ***,its complex pr.par.tion pr.cesses and har.h conditions make it unsuitable for.pr.ctical ***,a car.on-coated hybr.d cr.stal composite(Sn/SnO_(x)@C)was pr.par.d using an up-bottom method with commer.ial Sn/SnO *** effects acceler.te the electr.chemical kinetics and inhibit the coar.ening of Sn *** Sn/SnO_(x)@C composite electr.de exhibited capacity r.tention of 80.7%ev.n after.appr.ximately 1000 cycles(360.4 mAh·g^(−1)) at a cur.ent density of 1 A·g^(−1).The high-load Na_(3)v.(2)(PO4)3||Sn/SnO_(x)@C full cell pr.sents a capacity r.tention r.te of 91.7%after.150 cycles at the cur.ent density of 0.5 A·g^(−1).This wor. may significantly acceler.te the commer.ialization of the Sn/SnO_(x)@C composite in sodium-ion batter.es with high ener.y density.

关键词： Sodium-ion batter.es(SIBs) Sn-based anode Ultr.v.olet cur.ng Up-bottom method

Effect of differ.nt dr.ing methods on the amino acids,α-dicar.onyls and v.latile compounds of r.pe bee pollen

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年第1期13卷 517-527页

作者： Yanxiang Bi Jiabao ni Xiaofeng Xue Zidan Zhou Wenli Tian v.lér.e Or.at Sha Yan Wenjun Peng Xiaoming Fang State Key Labor.tor. of r.sour.e Insects Institute of Apicultural ResearchChinese Academy of Agricultural SciencesBeijing 100093China College of Engineer.ng China Agricultural UniversityBeijing 100083China Bior.sour.e Engineer.ng Dept. McGill UniversitySte-Anne-de-Bellevue QC H9X 3V9Canada

The significant demand for.high quality food has motiv.ted us to adopt appr.pr.ate pr.cessing methods to impr.v. the food nutr.tional quality and *** this study,the effects of fiv. dr.ing methods,namely,pulsed v.cuum dr.ing(Pv.),fr.eze dr.ing(FD),infr.r.d dr.ing(Ir.),hot-air.dr.ing(HAD)and sun dr.ing(SD)on fr.e amino acids(FAAs),α-dicar.onyl compounds(α-DCs)and v.latile compounds(v.Cs)in r.pe bee pollen(r.P)wer. *** r.sults showed that FD significantly r.leased the essential amino acids(EAAs)compar.d with fr.sh samples while SD caused the highest *** was the dominantα-DCs in r.P and the highest loss was obser.0}d after.*** wer. the dominant v.latiles of r.P and SD samples contained mor. new v.latile substances(especially aldehydes)than the other.four.dr.ing ***,FD and Pv. would be potential methods to effectiv.ly r.duce the quality deter.or.tion of r.P in the dr.ing pr.cess.

关键词： Dr.ing Bee pollen Fr.e amino acids α-Dicar.onyl compounds v.latile compounds

v.r.ically stacked skin-like activ.-matr.x display with ultr.high aper.ur. r.tio

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第9期13卷 1828-1840页

作者： Juntong Li Yanping ni Xiaoli Zhao Bin Wang Chuang Xue Zetong Bi Cong Zhang Yongjun Dong Yanhong Tong Qingxin Tang Yichun Liu Key Labor.tor. of Uv.Emitting Mater.als and Technology of Ministr. of Education Northeast Normal UniversityChangchunChina

v.r.ically stacked all-or.anic activ.-matr.x or.anic light-emitting diodes ar. pr.mising candidates for.high-quality skinlike displays due to their.high aper.ur. r.tio,extr.me mechanical flexibility,and low-temper.tur. pr.cessing ***,these displays suffer.fr.m pr.cess inter.er.nces when inter.onnecting functional layer. made of all-or.anic *** ov.r.ome this challenge,we pr.sent an innov.tiv. integr.tion str.tegy called“discr.te pr.par.tionmultilayer.lamination”based on micr.electr.nic *** this str.tegy,each functional layer.was pr.par.d separ.tely on differ.nt substr.tes to av.id chemical and physical damage caused by pr.cess inter.er.nces.A single inter.onnect layer.was intr.duced between each v.r.ically stacked functional layer.to ensur. mechanical compatibility and *** to the pr.v.ously r.por.ed layer.by-layer.pr.par.tion method,the pr.posed method eliminates the need for.tedious pr.tection v.a bar.ier.and pixel-defining layer.pr.cessing ***,based on activ.-matr.x display,this str.tegy allows multiple pixels to collectiv.ly display a patter. of“1”with an aper.ur. r.tio of 83%.Mor.ov.r.the av.r.ge mobility of full-photolithogr.phic or.anic thin-film tr.nsistor. was 1.04 cm2 v.1 s−1,ensur.ng stable and unifor. *** str.tegy for.s the basis for.the constr.ction of v.r.ically stacked activ.matr.x displays,which should facilitate the commer.ial dev.lopment of skin-like displays in wear.ble electr.nics.

关键词： inter.onnection matr.x v.r.ical