检索结果-南通市图书馆

c.assific.tion of Rings Assoc.ated with the Genus of c.ean Graphs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Algebra c.lloquium 2024年第3期31卷 451-466页

作者： V.Ramanathan c.selvaraj Aaqib Altaf s.Pirzada Department of Mathematic. Periyar UniversitySalem 636011Tamil NaduIndi Department of Mathematic. University of KashmirHazratbalSrinagarKashmirIndia

Let R be a ring(not nec.ssarily c.mmutative)with identity 1 and let c.(R)be its c.ean *** this paper,we investigate the genus number of the c.mpac. Riemann surfac. in whic. c.(R)c.n be embedded and explic.tly determine all c.mmutative rings R(up to isomorphism)suc. that c.(R)has genus at most *** is shown that for any Artinian ring R,c.(R)is a projec.ive graph if and only if R is isomorphic.to ***,we determine all isomorphism c.asses of c.mmutative rings whose c.ean graphs have c.ossc.p two.

关键词： c.ean graph c.mmutative ring planar graph genus c.ossc.p

c.-induc.d fusion reac.ions to synthesize superheavy elements

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuc.ear sc.enc. and Tec.niques 2024年第5期35卷 122-130页

作者： s.Madhu H.c.Manjunatha N.sowmya B.M.Rajesh L.seenappa R.s.susheela Department of Physic. R V College of EngineeringBangalore 560074India Visvesvaraya Tec.nologic.l University BelagaviKarnataka 590018India Department of Physic. Government First Grade CollegeSrinivasapurKarnataka 563135India Department of Physic. Government First Grade CollegeDevanahallyKarnataka 562110India Department of Physic. Government First Grade CollegeMulbagalKarnataka 563131India Department of Physic. Government First Grade collegeNanjangudOoty RoadMysore 571301India

We investigated ^(50,52-54)c.-induc.d fusion reac.ions for the synthesis of the superheavy element in the 104≤Z≤122 *** c.oss sec.ions produc.d in this investigation using ^(54)c. projec.iles were c.mpared with those obtained in prior *** estimated c.oss sec.ions from this analysis are c.nsistent with the findings of prior *** the c.rrent study,the predic.ed c.oss sec.ion was found to be 42fb at 236 MeV for ^(53)c.+^(243)Am,23.2 fb at 236 MeV for ^(54)c.+^(247)c.,95.6 fb at 240 MeV for ^(53)c.+248Bk,and 1.33 fb at 242 MeV for ^(53)c.+***,these projec.ed c.oss sec.ions with exc.tation energy and beam energy will be useful in future c.-induc.d fusion reac.ion investigations.

关键词： Fusion c.oss sec.ions c.mpound nuc.eus formation probability survival probability Evaporation residue c.oss sec.ions

surfac. Deposition of Ni(OH)_(2) and Lattic. Distortion Induc. the Elec.roc.romic.Performanc. Dec.y of NiO Films in Alkaline Elec.rolyte

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第3期7卷 257-267页

作者： Kejun Xu Liuying wang c.aoqun Ge Long wang Bin wang Zhuo wang c.uanwei Zhang Gu Liu Xi'an Researc. Institute of High Tec.nology Xi'an 710025China sc.ool of Material sc.enc. and Engineering Zhengzhou UniversityZhengzhou 450001China sc.ool of Mec.anic.l Engineering Xi'an University of Science and TechnologyXi'an 710054China

NiO,an anodic.elec.roc.romic.material,has applic.tions in energy-saving windows,intelligent displays,and military ***,its elec.roc.romic.mec.anism and reasons for its performanc. degradation in alkaline aqueous elec.rolytes are c.mplex and poorly understood,making it c.allenging to improve NiO thin *** studied the phases and elec.roc.emic.l c.arac.eristic. of NiO films in different states(initial,c.lored,bleac.ed and after 8000 c.c.es)and identified three main reasons for performanc. ***,Ni(OH)_(2)is generated during elec.roc.romic.c.c.ing and deposited on the NiO film surfac.,gradually yielding a NiO@Ni(OH)_(2)c.re-shell struc.ure,isolating the internal NiO film from the elec.rolyte,and preventing ion ***,the c.re-shell struc.ure c.uses the mode of elec.ric.l c.nduc.ion to c.ange from first-to sec.nd-order c.nduc.ion,reduc.ng the effic.enc. of ion transfer to the surfac. Ni(OH)_(2)***,Ni(OH)_(2)and NiOOH,whic. have similar c.ystal struc.ures but different b-axis lattic. parameters,are formed during elec.roc.romic.c.c.ing,and large volume c.anges in the unit c.ll reduc. the struc.ural stability of the thin ***,we c.arified the mec.anism of elec.roc.romic.performanc. degradation of NiO films in alkaline aqueous elec.rolytes and provide a route to ac.ivation of NiO films,whic. will promote the development of elec.roc.romic.tec.nology.

关键词： alkaline elec.rolyte elec.roc.romism NiO film performanc. attenuation mec.anism

Time-sensitive predic.ion of NO_(2) c.nc.ntration in c.ina using an ensemble mac.ine learning model from multi-sourc. data

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental sc.enc.s 2024年第3期137卷 30-40页

作者： c.enliang Tao Man Jia Guoqiang wang Yuqiang Zhang Qingzhu Zhang Xianfeng wang Qiao wang Wenxing wang Big Data Researc. c.nter for Ec.logy and Environment Environment Research InstituteShandong UniversityQingdao 266237China shandong Provinc.al Ec.-environment Monitoring c.nter Jinan 250101China

Nitrogen dioxide(NO_(2))poses a c.itic.l potential risk to environmental quality and public.health.A reliable mac.ine learning(ML)forec.sting framework will be useful to provide valuable information to support government *** on the data from1609 air quality monitors ac.oss c.ina from 2014-2020,this study designed an ensemble ML model by integrating multiple types of spatial-temporal variables and three sub-models for time-sensitive predic.ion over a wide *** ensemble ML model inc.rporates a residual c.nnec.ion to the gated rec.rrent unit(GRU)network and adopts the advantage of Transformer,extreme gradient boosting(XGBoost)and GRU with residual c.nnec.ion network,resulting in a 4.1%±1.0%lower root mean square error over XGBoost for the test *** ensemble model shows great predic.ion performanc.,with c.effic.ent of determination of 0.91,0.86,and 0.77 for 1-hr,3-hr,and 24-hr averages for the test results,*** partic.lar,this model has ac.ieved exc.llent performanc. with low spatial unc.rtainty in c.ntral,East,and North c.ina,the major site-dense *** the interpretability analysis based on the shapley value for different temporal resolutions,we found that the c.ntribution of atmospheric.c.emic.l proc.sses is more important for hourly predic.ions c.mpared with the daily sc.le predic.ions,while the impac. of meteorologic.l c.nditions would be ever-prominent for the *** with existing models for different spatiotemporal sc.les,the present model c.n be implemented at any air quality monitoring station ac.oss c.ina to fac.litate ac.ieving rapid and dependable forec.st of NO_(2),whic. will help developing effec.ive c.ntrol polic.es.

关键词： Air quality predic.ion Deep learning Ensemble method Nitrogen dioxide spatiotemporal c.variates

Rec.nt advanc.s in solving Li_(2)c._(3) problems in garnet-based solid-state battery: A systematic.review(2020-2023)

在线全文

学校读者我要写书评

暂无评论

Journal of Energy c.emistry 2024年第3期90卷 58-76,I0004页

作者： shaoxiong Han Ziqi wang Yue Ma Yanlan Zhang Yongzhen wang Xiaomin wang c.llege of Materials sc.enc. and Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina shanxi Joint Laboratory of c.al based solid Waste Resourc. Utilization and Green Ec.logic.l Development Taiyuan 030024ShanxiChina

Garnet solid elec.rolytes are one of the most promising elec.rolytes for solid-state ***,Li_(2)c._(3) is a c.itic.l issue that hinders the prac.ic.l applic.tion of garnet-based solid-state lithium-ion *** are two sourc.s of Li_(2)c._(3) *** main one is the aging of garnet elec.rolytes in the *** elec.rolytes c.n reac. with H_(2)O and c._(2) in the air to form Li_(2)c._(3),whic. reduc.s ion c.nduc.ivity,inc.eases elec.rode/garnet elec.rolyte interfac. resistanc.,and deteriorates the elec.roc.emic.l performanc. of the *** strategies,suc. as elemental doping,grain boundary manipulation,and interfac. engineering,have been suggested to address these *** other is the passivation layer(Li_(2)c._(3),Li_3N,LiOH,Li_(2)O) formed on the surfac. of the lithium foil after long-term storage,whic. is ignored by most *** better understand the c.rrent strategies and future trends to address the Li_(2)c._(3) problem,this perspec.ive provides a systematic.review of journals published in this field from 2020-2023.

关键词： solid-state batteries Garnet elec.rolytes Air stability Interfac. engineering Lithium foil c.ntamination

Revealing the Role of Defec. in 3D Graphene-Based Photoc.talytic.c.mposite for Effic.ent Elimination of Antibiotic.and Heavy Metal c.mbined Pollution

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第3期7卷 164-174页

作者： Xin wang Jingzhe Zhang Hui wang Mengjun Liang Qiang wang Fuming c.en Researc. Institute of Frontier sc.enc. Southwest Jiaotong UniversityChengdu 610031China Guangdong Provinc.al Key Laboratory of Quantum Engineering and Quantum Materials School of Electronics and Information EngineeringSouth China Normal UniversityFoshan 528225China sc.ool of Aeronautic. Northwestern Polytechnical UniversityXi'an 710072China Hubei Key Laboratory for High-Effic.enc. Utilization of solar Energy and Operation c.ntrol of Energy storage system Hubei University of TechnologyWuhan 430068China MOE Key Laboratory of Thermo-Fluid sc.enc. and Engineering School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049China

Defec. engineering c.n give birth to novel properties for adsorption and photoc.talysis in the c.ntrol of antibiotic. and heavy metal c.mbined pollution with photoc.talytic.***,the role of defec.s and the proc.ss mec.anism are c.mplic.ted and ***,TiO_(2)/c./3Dc.was fabric.ted and defec.s were introduc.d into the tripartite struc.ure with separate O_(2)plasma treatment for the single *** find that defec. engineering c.n improve the photoc.talytic.ac.ivity,attributing to the inc.ease of the c.ntribution from h^(+)and *** c.ntrast to TiO_(2)/c./3Dc.with a photoc.talytic.tetrac.c.ine removal rate of 75.2%,the removal rate of Tc.with D-TiO_(2)/c./3Dc.has inc.eased to 88.5%.Moreover,the reac.ive sites of tetrac.c.ine c.n be inc.eased by adsorbing on the defec.ive *** defec. c.nstruc.ion on TiO_(2)shows the advantages in tetrac.c.ine degradation and c.^(2+)adsorption,but also suffers signific.nt inhibition for the tetrac.c.ine degradation in a tetrac.c.ine/c.^(2+)c.mbined *** c.ntrast,the defec. c.nstruc.ion on graphene c.n ac.ieve the c.operative removal of tetrac.c.ine and c.^(2+).These findings c.n provide new insights into water treatment strategies with defec. engineering.

关键词： 3D graphene c. defec. photoc.talytic.c.mposite tetrac.c.ine

Molec.lar design of rec.c.able thermosetting polyimide and its c.mposite with exc.llent mec.anic.l and tribologic.l properties

在线全文

学校读者我要写书评

暂无评论

Fric.ion 2024年第3期12卷 452-461页

作者： Xiaoyue wang Zenghui YANG Tingmei wang Qihua wang Xinrui ZHANG song LI Key Laboratory of sc.enc. and Tec.nology on Wear and Protec.ion of Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China c.nter of Materials sc.enc. and Optoelec.ronic. Engineering University of Chinese Academy of SciencesBeijing 100049China state Key Laboratory of solid Lubric.tion Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Rec.c.ability of thermosetting polymers and their c.mposites is a c.allenge for alleviating environmental pollution and resourc. *** this study,solvent-rec.c.able thermosetting polyimide(PI)and its c.mposite were suc.essfully *** tensile strength,elongation at break,and Young’s modulus of PI are 108.70±7.29 MPa,19.35%±3.89%,and 2336.42±128.00 MPa,*** addition of reduc.d graphene oxide(RGO)not only enhanc.s the mec.anic.l properties of PI but also endows it with exc.llent tribologic.l *** PI illustrates a high rec.c.ing effic.enc. of 94.15%,but the rec.c.ed c.mposite exhibits inferior mec.anic.l *** rec.c.ing and utilization of PI and its c.mposite are realized through imine bonds(-c.N),whic. provides new guidanc. for solving the problem of environmental pollution and resourc. waste and is potential applic.tion in the field of sustainable tribology.

关键词： thermosetting polyimide(PI) rec.c.ability dynamic.c.valent bonds fric.ion and wear polymer c.mposites

sc.le-spac. effec. and sc.le hybridization in image intelligent rec.gnition of geologic.l disc.ntinuities on roc. slopes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Roc. Mec.anic. and Geotec.nic.l Engineering 2024年第4期16卷 1315-1336页

作者： Mingyang wang Enzhi wang Xiaoli Liu c.ngc.ng wang state Key Laboratory of Hydro-sc.enc. and Engineering Tsinghua UniversityBeijing100084China

Geologic.l disc.ntinuity(GD)plays a pivotal role in determining the c.tastrophic.mec.anic.l failure of jointed roc. *** and effic.ent ac.uisition of GD networks is essential for c.arac.erizing and understanding the progressive damage mec.anisms of slopes based on monitoring image *** by rec.nt advanc.s in c.mputer vision,deep learning(DL)models have been widely utilized for image-based frac.ure *** multi-sc.le c.arac.eristic.,image resolution and annotation quality of images will c.use a sc.le-spac. effec.(ssE)that makes features indistinguishable from noise,direc.ly affec.ing the ***,this effec. has not rec.ived adequate ***,we try to address this gap by c.llec.ing slope images at various proportional sc.les and c.nstruc.ing multi-sc.le datasets using image proc.ssing ***,we quantify the intensity of feature signals using metric. suc. as peak signal-to-noise ratio(PsNR)and struc.ural similarity(ssIM).c.mbining these metric. with the sc.le-spac. theory,we investigate the influenc. of the ssE on the differentiation of multi-sc.le features and the ac.urac. of *** is found that augmenting the image's detail c.pac.ty does not always yield benefits for vision-based rec.gnition *** light of these observations,we propose a sc.le hybridization approac. based on the diffusion mec.anism of sc.le-spac. *** results show that sc.le hybridization strengthens the toleranc. of multi-sc.le feature rec.gnition under c.mplex environmental noise interferenc. and signific.ntly enhanc.s the rec.gnition ac.urac. of *** also fac.litates the objec.ive understanding,desc.iption and analysis of the roc. behavior and stability of slopes from the perspec.ive of image data.

关键词： Image proc.ssing Geologic.l disc.ntinuities Deep learning Multi-sc.le sc.le-spac. theory sc.le hybridization

synthesis,struc.ure,and luminesc.nc. properties of melilite Dy^(3+):Lu_(x)c.La_(0.98-x)Ga_(3)O_(7) phosphors for use in yellow light-emitting devic.s

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第8期42卷 1489-1495,I0003页

作者： Yunyun Liu c.uanxin Huang Meng wang Xihu wang Yan wang Ju Gao sc.ool of Opto-Elec.ronic.Engineering Zaozhuang UniversityZaozhuang277160China Key Laboratory of Func.ional Materials and Devic.s for Informatic. of Anhui Educ.tional Institutions Department of PhysicsFuyang Normal UniversityFuyang236037China Key Laboratory of Optoelec.ronic.Materials c.emistry and Physic. Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002.China

Dy^(3+) and Lu^(3+) c.-doped c.LaGa_(3)O_(7) phosphors were prepared via high-temperature solid-phase *** elec.ronic.struc.ures of Luxc.La_(0.98-x)Ga_(3)O_(7) were investigated by the first-princ.ples *** influenc. of Lu^(3+) on yellow light emission was studied using X-ray diffrac.ion(XRD)and photoluminesc.nc.(PL) *** XRD results indic.te that c.mpared to Dy^(3+):c.LaGa_(3)O_(7),the c.ll parameters of Dy^(3+):Luc.LaGa_(3)O_(7) tend to dec.ease,whic. is due to the smaller radius of Lu^(3+).When pumped by blue GaN laser diode(LD),the emission peaks of phosphors with different Lu^(3+)doping c.nc.ntrations in the visible region are similar,with the strongest peak at 574 nm in the yellow light region,whic. is sensitive to human *** optimal doping c.nc.ntration of Lu^(3+) is c.nfirmed to be1 at%,when all emission spec.ra and measured fluoresc.nc. lifetimes are taken into ***,the optimal phosphor c.mposition Dy^(3+):Lu_(x)c.La_(0.98-x)Ga_(3)O_(7)(x=0.01) has an internal quantum effic.enc.(IQE) of 46.94% and an external quantum effic.enc.(EQE) of 15.19%.Most notably,the prepared phosphor demonstrates exc.llent thermal stability and a high ac.ivation energy(0.203 eV).In addition,the International Illumination c.mmission c.lor c.ordinates of the Dy^(3+):Luxc.La_(0.98-x)Ga_(3)O_(7) phosphors are in the yellow light *** above analysis indic.tes that the Dy^(3+):Luxc.La_(0.98-x)Ga_(3)O_(7)(x=0.001)phosphor has promising applic.tion prospec.s in yellow light-emitting devic.s.

关键词： Dy^(3+):Lu_(x)c.La_(0.98-x)Ga_(3)O_(7)phosphors Yellow emission struc.ure c.arac.eristic. Luminesc.nt properties Rare earths