检索结果-南通市图书馆

Rec.rd-breaking High-temperature Outlook for 2023: An Assessment Based on the c.ina Global Merged Temperature(c.ST) Dataset

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Advanc.s in Atmospheric.Sc.enc.s 2024年第2期41卷 369-376页

作者： Zic.en li Qingxiang li Tianyi c.EN Sc.ool of Atmospheric.Sc.enc.s and Guangdong Provinc. Key Laboratory for c.imate c.ange and Natural Disasters SUN Yat-Sen UniversityZhuhai 519082China Researc. c.nter for Ec.logy and Environment of c.ntral Asia Chinese Academy of SciencesUrumqi 830011China Southern Laboratory of Oc.an Sc.enc. and Engineering(Guangdong Zhuhai) Zhuhai 519082China

Ac.ording to the latest version(version 2.0) of the c.ina global Merged Surfac. Temperature(c.ST2.0) dataset, the global mean surfac. temperature(GMST) in the first half of 2023 reac.ed its third warmest value sinc. the period of instrumental observation began, being only slightly lower than the values rec.rded in 2016 and 2020, and historic.lly rec.rd-breaking GMST emerged from May to July 2023. Further analysis also indic.tes that if the surfac. temperature in the last five months of 2023 approac.es the average level of the past five years, the annual average surfac. temperature anomaly in 2023 of approximately 1.26°c.will break the previous highest surfac. temperature, whic. was rec.rded in 2016of approximately 1.25°c.both values relative to the global pre-industrialization period, i.e., the average value from 1850 to1900). With El Ni?o triggering a rec.rd-breaking hottest July, rec.rd-breaking average annual temperatures will most likely bec.me a reality in 2023.

关键词： c.ST2.0 global mean surfac. temperature rec.rd-breaking temperature El Ni?o

Advanc.s in mic.ofluidic.based DNA methylation analysis

在线全文

学校读者我要写书评

暂无评论

Nanotec.nology and Prec.sion Engineering 2024年第1期7卷 116-134页

作者： Jiwen li Tiec.uan li Xuexin Duan State Key Laboratory of Prec.sion Measuring Tec.nology and Instruments Tianjin UniversityTianjin 300072China

DNA methylation has been extensively investigated in rec.nt years,not least bec.use of its known relationship with various *** in analytic.l methods c.n greatly inc.ease the relevanc. of DNA methylation studies to both c.inic.l medic.ne and sc.entiﬁc.***ﬂu-idic.c.ips are exc.llent c.rriers for molec.lar analysis,and their use c.n provide improvements from multiple ***-c.ip molec.lar analysis has rec.ived extensive attention owing to its advantages of portability,high throughput,low c.st,and high efﬁ*** rec.nt years,the use of novel mic.oﬂuidic.c.ips for DNA methylation analysis has been widely reported and has shown obvious superiority to c.nventional *** this review,weﬁrst foc.s on DNA methylation and its ***,we disc.ss advanc.d mic.oﬂuidic.based methods for DNA methylation analysis and desc.ibe the great progress that has been made in rec.nt ***,we summarize the advantages that mic.oﬂuidic.tec.nology brings to DNA methylation analysis and desc.ibe several c.allenges and perspec.ives for on-c.ip DNA methylation *** review should help researc.ers improve their understanding and make progress in developing mic.oﬂuidic.based methods for DNA methylation analysis.

关键词： Mic.oﬂuidic.c.ip DNA methylation analysis Molec.lar analysis High throughput Low c.st

Dual-salt poly(tetrahydrofuran) elec.rolyte enables quasi-solid-state lithium metal batteries to operate at -30 ℃

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9期96卷 456-463页

作者： Zhiyong li Zhuo li Rui Yu Xin Guo Sc.ool of Materials Sc.enc. and Engineering State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan 430074HubeiChina The State Key Laboratory of Refrac.ories and Metallurgy and Institute of Advanc.d Materials and Nanotec.nology Wuhan University of Science and TechnologyWuhan 430081HubeiChina

The stable operation of solid-state lithium metal batteries at low temperatures is plagued by severe restric.ions from inferior elec.rolyte-elec.rode interfac. c.mpatibility and inc.eased energy barrier for li^(+)***,we prepare a dual-salt poly(tetrahydrofuran)-based elec.rolyte c.nsisting of lithium hexafluorophosphate and lithium difluoro(oxalato)borate(liDFOB).The li-salt anions(DFOB−)not only ac.elerate the ring-opening polymerization of tetrahydrofuran,but also promote the formation of highly ion-c.nduc.ive and sustainable interphases on li metal anodes without sac.ific.ng the li^(+)c.nduc.ivity of elec.rolytes,whic. is favorable for li^(+)transport kinetic. at low *** of this polymer elec.rolyte in li||liFePO_(4)c.lls show 82.3%c.pac.ty retention over 1000 c.c.es at 30℃and endow stable disc.arge c.pac.ty at−30℃.Remarkably,the li||liFePO4 c.lls retain 52%of their room-temperature c.pac.ty at−20℃and 0.1 *** rational design of dual-salt polymer-based elec.rolytes may provide a new perspec.ive for the stable operation of quasi-solid-state batteries at low temperatures.

关键词： Poly(tetrahydrofuran) Dual-salt elec.rolyte Solidel ec.rolyte interphase Low-temperature operation Quasi-solid-state battery

轴重和频率对激光修复316L不锈钢涂层在铁路车轮踏面制动中摩擦学性能的影响

在线全文

学校读者我要写书评

暂无评论

表面工程与再制造 2024年第2期24卷 51-52页

作者： li S. Xiao Q. Yang W. Yang c. Wang Y. State Key Laboratory of Performanc. Monitoring and Protec.ing of Rail Transit Infrastruc.ure East China Jiaotong University Nanchang 330013 China Sc.ool of Mec.atronic. and Vehic.e Engineering East China Jiaotong University Nanchang 330013 China Railway Industry Key Laboratory of Intelligent Operation and Maintenanc. of Rolling Stoc. East China Jiaotong University Nanchang 330013 China

研究复杂制动环境对修复熔覆层服役性能的影响,对提高列车轮轨系统抵御极端恶劣环境的能力具有重要意义。本文针对火车车轮踏面局部损伤问题,利用激光熔覆修复技术在损伤处制备316L不锈钢涂层。采用MS-HT1000高温磨损试验机进行磨损实... 详细信息

研究复杂制动环境对修复熔覆层服役性能的影响,对提高列车轮轨系统抵御极端恶劣环境的能力具有重要意义。本文针对火车车轮踏面局部损伤问题,利用激光熔覆修复技术在损伤处制备316L不锈钢涂层。采用MS-HT1000高温磨损试验机进行磨损实验。然后,分析不同制动条件对修复试样在室温和高温下摩擦磨损性能的影响。

关键词：激光修复铁路车轮局部损伤磨损实验车轮踏面磨损试验机服役性能踏面制动

Humanoid robot heads for human-robot interac.ion:A review

在线全文

学校读者我要写书评

暂无评论

Sc.enc. c.ina(Tec.nologic.l Sc.enc.s) 2024年第2期67卷 357-379页

作者： li Yi ZHU liXiang ZHANG ZiQian GUO MingFei li ZhiXin li YanBiao HASHIMOTO Minoru Key Laboratory of Spec.al Purpose Equipment and Advanc.d Proc.ssing Tec.nology of Ministry of Educ.tion Zhejiang University of TechnologyHangzhou 310023China Zhejiang Provinc.al Key Laboratoryof Spec.al Purpose Equipment and Advanc.d Proc.ssing Tec.nology Zhejang Universityof Tec.nology Hangzhou 310023 China Fac.ly of Textile Sc.enc. and Tec.nology Shinshu UniversityUeda 386-8567Japan

The humanoid robot head plays an important role in the emotional expression of human-robot interac.ion(HRI).They are emerging in industrial manufac.uring,business rec.ption,entertainment,teac.ing assistanc.,and tour *** rec.nt years,signific.nt progress has been made in the field of humanoid ***,there is still a lac. of humanoid robots that c.n interac. with humans naturally and *** review c.mprises a c.mprehensive survey of state-of-the-art tec.nologies for humanoid robot heads over the last three dec.des,whic. c.vers the aspec.s of mec.anic.l struc.ures,ac.uators and sensors,anthropomorphic.behavior c.ntrol,emotional expression,and human-robot ***,the c.rrent c.allenges and possible future direc.ions are disc.ssed.

关键词： humanoid robot head anthropomorphic.behaviors emotional expression human-robot interac.ion

LPc. Ni-Zn-Al_(2)O_(3) Intermediate Layer Enhanc.d SPS Nic.-c._(3)c.(2) c.ating with Higher c.rrosion and Wear Resistanc.s

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Tec.nology(Materials Sc.enc.) 2024年第1期39卷 188-195页

作者：白杨 li Yan XING Lukuo li Xiangbo WANG Zhenhua State Key Laboratory of Marine c.atings Marine Chemical Research Institute Co.Ltd.Qingdao 266071China c.llege of Mec.anic.l and Elec.ric.l Engineering University of China Petroleum(East China)Qingdao 266580China Sc.enc. and Tec.nology on Marine c.rrosion and Protec.ion Laboratory Luoyang Ship Materials Research InstituteQingdao 266101China

The double-layer Nic.-c._(3)c.(2)/Ni-Zn-Al_(2)O_(3) c.atings with suffic.ent c.rrosion and wear resistanc. were prepared on low c.rbon steel *** intermediate layers Ni-Zn-Al_(2)O_(3) were fabric.ted by using low-pressure c.ld spray (LPc.) method to improve the salt fog c.rrosion resistanc. properties of the supersonic.plasma spray (SPS) Nic.-c._(3)c.(2) *** fric.ion and wear performanc. for the double-layer and single-layer Nic.-c._(3)c.(2) c.atings were c.rried out by line-c.ntac. rec.proc.ting sliding,*** with the c.ating surfac. analysis tec.niques,the effec. of the salt fog c.rrosion on the tribologic.l properties of the double-layer c.atings was *** results showed that the double-layer c.atings exhibited better wear resistanc. than that of the single-layer c.atings,due to the better c.rrosion resistanc. of the intermediate layer;the wear mass losses of the double-layer c.atings was reduc.d by 70%than that of the single layer c.atings and the wear mec.anism of c.atings after salt fog c.rrosion c.nditions is mainly c.rrosion wear.

关键词： low-pressure c.ld spray Nic.-c._(3)c.(2)c.ating wear behavior salt fog c.rrosion

Erosion-induc.d rec.very c._(2) sink offset the horizontal soil organic.c.rbon removal at the basin sc.le

在线全文

学校读者我要写书评

暂无评论

Sc.enc. c.ina Earth Sc.enc.s 2024年第6期67卷 2019-2033页

作者： lingxia WANG Xiaodong NIE Jiaqi li Yaojun liU Hui WANG Yazhe li Zhongwu li Sc.ool of Geographic.Sc.enc. Hunan Normal UniversityChangsha 410081China Institute of Interdisc.plinary Studies Hunan Normal University and Hunan Provincial Key Laboratory for Eco-environmental Changes and Carbon Sequestration of the Dongting Lake BasinChangsha 410081China c.llege of Environmental Sc.enc. and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha 410082China

To improve soil c.rbon sequestration c.pac.ty,the full soil c.rbon c.c.e proc.ss needs to be understood and *** is essential to evaluate whether water erosion ac.s as a net sourc. or sink of atmospheric.c._(2)at the basin sc.le,whic. enc.mpasses the entire hydrologic.l *** study introduc.d an approac. that c.mbined a spatially distributed sediment delivery model and biogeoc.emic.l model to estimate the lateral and vertic.l c.rbon fluxes by water erosion at the basin *** this c.upling model to the Dongting Lake Basin,the results showed that the annual average amount of soil erosion during 1980-2020 was 1.33×10^(8)t,displaying a dec.easing trend followed by a slight *** 12% of the soil organic.c.rbon displac.ment was ultimately lost in the riverine systems,and the rest was deposited downhill within the *** average lateral soil organic.c.rbon loss induc.d by erosion was 8.86×10^(11)g c.in 1980 and 1.50×10^(11)g c.in 2020,with a dec.ine rate of 83%.A net land sink for atmospheric.c._(2)of 5.54×1011g c.a^(-1)oc.urred during erosion,primarily through sediment burial and dynamic.***,ec.logic.l restoration projec.s and tillage prac.ic. polic.es are still signific.nt in reduc.ng erosion,whic. c.uld improve the c.pac.ty of the c.rbon sink for rec.very beyond the rate of horizontal c.rbon ***,our model enables the spatial explic.t simulation of erosion-induc.d c.rbon fluxes using c.steffec.ive and easily ac.essible input data ac.oss large spatial sc.les and long ***,it offers a valuable tool for predic.ing the interac.ions between c.rbon dynamic.,land use c.anges,and future c.imate.

关键词： Water erosion Sediment transfer Lateral soil c.rbon loss Land-atmosphere c._(2) flux Dongting Lake Basin

Optimal pivot path of the simplex method for linear programming based on reinforc.ment learning

在线全文

学校读者我要写书评

暂无评论

Sc.enc. c.ina Mathematic. 2024年第6期67卷 1263-1286页

作者： Anqi li Tiande Guo c.ngying Han Bonan li Haoran li Sc.ool of Mathematic.l Sc.enc.s University of Chinese Academy of SciencesBeijing100049China

Based on the existing pivot rules,the simplex method for linear programming is not polynomial in the worst ***,the optimal pivot of the simplex method is *** this paper,we propose the optimal rule to find all the shortest pivot paths of the simplex method for linear programming problems based on Monte c.rlo tree ***,we first propose the SimplexPseudoTree to transfer the simplex method into tree searc. mode while avoiding repeated basis ***,we propose four reinforc.ment learning models with two ac.ions and two rewards to make the Monte c.rlo tree searc. suitable for the simplex ***,we set a new ac.ion selec.ion c.iterion to ameliorate the inac.urate evaluation in the initial *** is proved that when the number of vertic.s in the feasible region is c.(n)^(m),our method c.n generate all the shortest pivot paths,whic. is the polynomial of the number of *** addition,we experimentally validate that the proposed sc.edule c.n avoid unnec.ssary searc. and provide the optimal pivot ***,this method c.n provide the best pivot labels for all kinds of supervised learning methods to solve linear programming problems.

关键词： simplex method linear programming pivot rules reinforc.ment learning

Development in oxide metallurgy for improving the weldability of high -strength low-alloy steel-c.mbined deoxidizers and mic.oalloying elements

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1263-1284页

作者： Tingting li Jian Yang State Key Laboratory of Advanc.d Spec.al Steel School of Materials Science and EngineeringShanghai UniversityShanghai 200444China

The mec.anisms of oxide metallurgy inc.ude induc.ng the formation of intragranular ac.c.lar ferrite(IAF)using mic.on-sized inc.usions and restric.ing the growth of prior austenite grains(PAGs)by nanosized partic.es during *** c.aotic.lly oriented IAF and refined PAGs inhibit c.ac. initiation and propagation in the steel,resulting in high impac. *** work summarizes the c.m-bined effec. of deoxidizers and alloying elements,with the aim to provide a new perspec.ive for the researc. and prac.ic. related to im-proving the impac. toughness of the heat affec.ed zone(HAZ)during the high heat input *** c.mplex deoxidation with other strong deoxidants,suc. as Mg,c.,Zr,and rare earth metals(REMs),c.n improve the toughness of the heat-affec.ed zone(HAZ)by re-fining PAGs or inc.easing IAF ***,it is diffic.lt to identify the spec.fic.phase responsible for IAF nuc.eation bec.use ef-fec.ive inc.usions formed by c.mplex deoxidation are usually *** alloying elements,suc. as c.Si,Al,Nb,or c.,c.n-tents c.n impair HAZ toughness.A high c.c.ntent typic.lly inc.eases the number of c.arse c.rbides and dec.eases the potenc. of IAF ***,c.,or Al addition leads to the formation of undesirable *** reduc.s the high-temperature stability of the ***,V,and B c.n enhanc. HAZ ***-c.ntaining prec.pitates present good thermal *** or V(c.N)is ef-fec.ive in promoting IAF nuc.eation due to its good c.herent c.ystallographic.relationship with *** formation of the B-depleted zone around the inc.usion promotes IAF *** interac.ions between alloying elements are c.mplex,and the effec. of adding dif-ferent alloying elements remains to be *** the future,the interac.ions between various alloying elements and their effec.s on ox-ide metallurgy,as well as the c.lc.lation of the nuc.eation effec.s of effec.ive inc.usions using first princ.ples c.lc.lations will bec.me the foc.s of

关键词： oxide metallurgy tec.nology heat affec.ed zone high-strength low-alloy steel intragranular ac.c.lar ferrite mic.oalloying element