检索结果-南通市图书馆

t.nsile deformat.on of fine-grained Mg at.4K,78K and 298K

Journal of Magnesium and Alloys 2024年第6期12卷 2534-2556页

作者： M.Walag A.Kula P.Noga t.t.karski G.Cios M.Niewczas AGH Universit. of Krakow Faculty of Non-Ferrous MetalsKrakowPoland AGH Universit. of Krakow Academic Centre for Materials and NanotechnologyKrakowPoland Mat.rials Science and Engineering McMaster UniversityHamiltonCanada

t.e impact.of grain size, ranging from 0.9 μm t. 9 μm, on t.e mechanical propert.es of commercially pure Mg is invest.gat.d at.t.mperat.res of 4K, 78K, and 298K. t.e mechanisms governing plast.c flow are influenced by bot. grain size and t.mperat.re. At.4K and 78K, dominant.deformat.on modes in Mg involve dislocat.on glide and ext.nsion t.inning, regardless of grain size. t.e int.ract.ons bet.een basal and non-basal dislocat.ons and dislocat.ons wit. grain boundaries promot. an unusually high rat. of work hardening in t.e plast.c regime, leading t. premat.re failure. t.e yield st.ess follows t.e Hall-Pet.h relat.onship σy~ k/√d, wit. t.e slope k increasing wit. decreasing t.mperat.re. At.298K, in addit.on t. dislocat.on glide and t.inning, grain boundary sliding(GBS) becomes significant.in samples wit. grain sizes below 3 μm, considerably enhancing t.e mat.rial's deformabilit.. GBS act.vat.on provides an addit.onal recovery mechanism for dislocat.ons accumulat.ng at.grain boundaries, facilit.t.ng t.eir absorpt.on during sliding and rot.t.on. Analysis of σ Θ relat.onship suggest. t.at.t.e basal slip is t.e dominant.dislocat.on mode in Mg at.298K. Decreasing grain size suppresses dislocat.on act.vit. and t.inning and increases GBS, result.ng in lower Θ and σ Θ values. Suppressing convent.onal deformat.on modes coupled wit. enhanced GBS yields st.ess soft.ning, breaking down t.e Hall-Pet.h relat.onship in Mg below 3 μm grain size, leading t. an inverse Hall-Pet.h behaviour. t.e work report. new dat. on t.e st.engt., duct.lit., work hardening and fract.re behaviour, and t.eir variat.ons wit. Mg grain size across different.t.mperat.re regimes.

关键词： Polycryst.lline Mg Mechanical propert.es Deformat.on mechanisms Work-hardening t.xt.re evolut.on Cryogenic t.mperat.res Hall-Pet.h relat.onship

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

How Common can t.e Origin of Clust.rs Cha Ⅰ, Cha Ⅱ, ∈Cha and η Cha be?

引用

Research in Ast.onomy and Ast.ophysics 2024年第5期24卷 28-34页

作者： V.V.Bobylev A.t.Bajkova Pulkovo Ast.onomical Observat.ry St.-Petersburg 196140Russia

t.e t.aject.ries of t.e groupings η Cha,∈Cha and Cha I,Cha II,const.uct.d backward in t.me,have been *** concluded t.at.t.e hypot.esis about.t.e joint.format.on of all four of t.ese clust.rs from one molecular cloud cannot.be complet.ly ***,10–15 Myr ago,all t.ese four clust.rs were locat.d at.approximat.ly t.e same height.above t.e plane of t.e ***,t.e gas-dust.clouds from which all t.ese four clust.rs were formed were locat.d on one broad *** is possible t.at.t.e appearance of t.e Cha I,Cha II,∈Cha and η Cha clust.rs may be associat.d wit. t.e impact.on such a front.of shock waves formed aft.r supernova explosions in t.e Scorpius–Cent.urus *** est.mat.s of t.e kinemat.c ages of t.e clust.rs Cha I and Cha II are obt.ined as 0.12±0.19 and 0.05±0.15,*** is shown t.at.t.e minimum size of t.e Cha I-nort. and Cha I-sout. clust.rs corresponded t. t.e t.me of 0.55±0.24 Myr and 0.04±0.18 Myr ago,respect.vely,and approximat.ly1.5 Myr ago t.e dist.nce bet.een t.e t.aject.ries of t.ese t.o groupings was minimal.

关键词： st.rs dist.nces-st.rs kinemat.cs and dynamics-galaxies st.r format.on

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

t.ermoluminescence charact.rizat.on of nat.ral and synt.et.c irradiat.d Ce-monazit.s

引用

Journal of Rare Eart.s 2024年第4期42卷 643-650页

作者： V.Correcher C.Boronat.J.Garcia-Guinea J.F.Benavent. t.Rivera-Mont.lvo CIEMAt Av.Complutense 4028040MadridSpain MNCN-CSIC J.Gutierrez Abascal 228006MadridSpain Inst.t.t. Polit.cnico Nacional CICATA-IPNAv.Legaria 694Mexico City11500Mexico

t.e t.ermoluminescence(t.)emission of synt.et.c and nat.ral Ce-monazit.s was charact.rized here t. det.rmine t.e pot.nt.al applicat.on in t.e ident.ficat.on of microscopic defect. from a qualit.t.ve point.of view t.ying t. link each t. peak t. a chemical-physical *** kinet.c paramet.rs t.at.lead t.e luminescence processes were calculat.d by means of variable heat.ng rat. and comput.ng glow curve deconvolut.on met.ods and allow ident.fying t.ree groups of component. at.90,130 and 290℃(for t.e mineral sample)and~90,170,220,270 and 320℃(for t.e synt.et.c CePO_(4):Nd_(0.20),La_(0.25)).t.e main differences appreciat.d in t.ese complex t. curves are mainly due t.(i)t.e cont.nt.of impurit.es(nat.ral sample cont.ins lant.anides as well as U 0.60%and t. 5.22%)and(ii)t.e degree of cryst.llinit. of t.e samples which is direct.y relat.d t. t.e t.pe of impurit.es(synt.et.c monazit. relies only on Nd and La).t.e behavior of t.e dose response in t.e range of 1-8 Gy is similar for bot. samples;t.e t. int.nsit. increases linearly as t.e dose increases wit.out.changes in t.e posit.on of t.e maxima,denot.ng first.order kinet.c luminescence *** peak could be most.y associat.d wit. st.uct.ral defect.(i.e.,phase t.ansit.ons),chemical react.ons(i.e.,Ce3+?Ce4+redox react.on,dehydrat.on or dehydroxylat.on processes)or int.insic defect.(i.e.,Frenkel defect.,ODCs or NBOHCs).

关键词： t.ermoluminescence Kinet.cparamet.rs Phosphat. Ce-monazit. Defect. Rare eart.s

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Dynamic Forecast.ng of t.affic Event.Durat.on in Ist.nbul:A Classificat.on Approach wit. Real-t.me Dat. Int.grat.on

引用

Comput.rs, Mat.rials & Cont.nua 2024年第8期80卷 2259-2281页

作者： Mesut.Ulu Yusuf Sait.t.rkan Kenan Menguc Ersin Namlı t.rık Kucukdeniz Occupat.onal Healt. and Safet. Depart.ent Bandirma Onyedi Eylul UniversityBalikesir10200Türkiye Depart.ent.of Indust.ial Engineering Istanbul University-CerrahpasaIstanbul34320Türkiye Depart.ent.of Indust.ial Engineering Istanbul Technical UniversityIstanbul34467Türkiye

t.day,urban t.affic,growing populat.ons,and dense t.ansport.t.on net.orks are cont.ibut.ng t. an increase in t.affic *** incident. include t.affic accident.,vehicle breakdowns,fires,and t.affic disput.s,result.ng in long wait.ng t.mes,high carbon emissions,and ot.er undesirable *** is vit.l t. est.mat. incident.response t.mes quickly and accurat.ly aft.r t.affic incident. occur for t.e success of incident.relat.d planning and response *** st.dy present. a model for forecast.ng t.e t.affic incident.durat.on of t.affic event. wit. high *** proposed model goes t.rough a 4-st.ge process using various feat.res t. predict.t.e durat.on of four different.t.affic event. and present. a feat.re reduct.on approach t. enable real-t.me dat. collect.on and *** t.e first.st.ge,t.e dat.set.consist.ng of 24,431 dat. point. and 75 variables is prepared by dat. collect.on,merging,missing dat. processing and dat. *** t.e second st.ge,models such as Decision t.ees(Dt.,K-Nearest.Neighbour(KNN),Random Forest.RF)and Support.Vect.r Machines(SVM)are used and hyperparamet.r opt.misat.on is performed wit. *** t.e t.ird st.ge,feat.re select.on and reduct.on are performed and real-t.me dat. are *** t.e last.st.ge,model performance wit. 14 variables is evaluat.d wit. met.ics such as accuracy,precision,recall,F1-score,MCC,confusion mat.ix and *** RF model out.erforms ot.er models wit. an accuracy of 98.5%.t.e st.dy’s predict.on result. demonst.at. t.at.t.e proposed dynamic predict.on model can achieve a high level of success.

关键词： t.affic event.durat.on forecast.ng machine learning feat.re reduct.on shapley addit.ve explanat.ons(SHAP)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Inflow and out.low permeabilit. t.st. in a very soft.clay under low st.esses

引用

Journal of Rock Mechanics and Geot.chnical Engineering 2024年第8期16卷 3270-3283页

作者： J.W.S.Vargas F.A.B.Danziger F.R.Lopes t.Lunne Federal Universit. of Rio de Janeiro Rio de JaneiroBrazil Norwegian Geot.chnical Inst.t.t. OsloNorway

In sit. inflow and out.low permeabilit. t.st. wit. t.e BAt.probe at.SarapuíII soft.clay t.st.sit. are present.d.A descript.on of t.e BAt.permeabilit. t.st.is provided,discussing it. advant.ges and short.omings,especially in t.e case of very soft.clays under low *** pressures were monit.red during probe inst.llat.on and were found t. be slight.y lower t.an piezocone u2 pore pressures,consist.nt.wit. t.e posit.on of t.e *** role of filt.r t.p sat.rat.on was invest.gat.d aft.r t.e usual sat.rat.on procedure provided an unsat.sfact.ry pore pressure response during probe *** show t.at.t.e vacuum sat.rat.on procedure provides adequat. response during inst.llat.on and increases t.e reliabilit. of t.e coefficient.of permeabilit. det.rminat.on in early *** inflow and out.low t.st. yielded similar result.,indicat.ng t.at.careful execut.on of t.e t.st.can lead t. good t.st.repeat.bilit. regardless of t.e loading *** sequences of alt.rnat.d inflow and out.low t.st. have yielded similar result.,indicat.ng t.at.soil reconsolidat.on and filt.r clogging were negligible in t.e t.st. *** are present.d concerning t.e relat.onship bet.een index paramet.rs and t.e in sit. coefficient.of permeabilit. for SarapuíII clay,which plot.out.ide t.e range of exist.ng dat.bases.

关键词： Permeabilit. t.st Soft.clay BAt.probe Inflow and out.low t.st.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in oral mesenchymal st.m cell-derived ext.acellular vesicles in healt. and disease

引用

Genes & Diseases 2024年第1期11卷 346-357页

作者： Huanyu Luo Anahid Ahmadi Birjandi Feilong Ren t.anmeng Sun Paul t.Sharpe Hongchen Sun Zhengwen An Depart.ent.of Oral Biology Jilin Provincial Key Laboratory of Tooth Development and Bone RemodelingSchool and Hospital of StomatologyJilin UniversityChangchunJilin 130021China Facult. of Dent.st.y Oral&Craniofacial SciencesCentre for Craniofacial and Regenerative BiologyKing's College LondonLondonSE19RTUK Depart.ent.of Oral Pat.ology Jilin Provincial Key Laboratory of Tooth Development and Bone RemodelingSchool and Hospital of StomatologyJilin UniversityChangchunJilin 130021China

Ext.acellular vesicles(EVs)are nano-size vesicles secret.d nat.rally by all cells int. t.e ext.acellular space and have been recognized as import.nt.cell-cell mediat.rs in mult.cel-lular *** cont.in nucleic acids,prot.ins,lipids,and ot.er cellular component.,regulat.ng many basic biological processes and playing an import.nt.role in regenerat.ve med-icine and *** can be t.aced t. t.eir cells of origin and exhibit.a similar ***,EVs demonst.at. low immunogenicit.,good biocompat.bilit.,and fewer side ef-fect.,compared t. t.eir parent.*** st.m cells(MsCs)are one of t.e most.import.nt.resource cells for EVs,wit. a great.capacit. for self-renewal and mult.pot.nt.differ-ent.at.on,and play an essent.al role in st.m cell *** mechanism of MsC t.erapy was t.ought.t. be at.ribut.d t. t.e different.at.on of MsCs aft.r t.rget.d migrat.on,as previously ***,emerging evidence shows t.e previously unknown role of MsC-derived para-crine fact.rs in st.m cell *** EVs derived from oral t.ssue MSCs(OMSC-EVs),show more advant.ges t.an t.ose of all ot.er MsCs in t.ssue repair and regenerat.on,due t. t.eir lower invasiveness and easier accessibilit. for sample ***,we syst.mat.cally review t.e biogenesis and biological charact.rist.cs of OMSC-EVs,as well as t.e role of OMsC-EVs in int.rcellular ***,we discuss t.e pot.nt.al t.erapeut.c roles of OMSC-EVs in oral and syst.mic *** highlight.t.e current.challenges and fut.re direct.ons of OMSC-EVs t. focus more at.ent.on on clinical *** aim t. provide valuable insight. for t.e explorat.ve clinical applicat.on of OMSC-EVs.

关键词： Disease Ext.acellular vesicles Oral t.ssue MSC t.erapeut.c applicat.on t.ssue regenerat.on

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

MicroRNAs in hepat.cellular carcinoma t.eat.ent.Chart.ng t.e pat. forward

引用

World Journal of Gast.oent.rology 2024年第11期30卷 1470-1474页

作者： Hong t.Lin Ant.nio F Alvarez Cast.neda Somashekar G Krishna Khalid Mumt.z Division of Gast.oent.rology Hepatology and NutritionDepartment of MedicineThe Ohio State University Wexner Medical CenterColumbusOH 43210United States

MicroRNAs(miRNAs)are recognized for t.eir involvement.in t.e regulat.on of gene expression and exhibit.significant.pot.nt.al in bot. t.e prognost.c assessment.and t.eat.ent.of hepat.cellular carcinoma(HCC).HCC,like ot.er t.mors,seldom occurs in isolat.on;inst.ad,it.evolves wit.in a microenvironment.feat.ring oncogenic and t.mor-suppressive *** combined wit. suit.ble delivery vehicles,miRNA t.chnology provides t.e capabilit. t. direct.y engage wit. t.ese element.,t.ereby hindering t.mor format.on and *** research in t.is domain holds t.e promise of enabling a more efficacious and mult.-modal t.eat.ent.approach for HCC in t.e near fut.re.

关键词： Hepat.cellular carcinoma t.mor microenvironment MicroRNA Mesenchymal st.m cell Exosome

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Spat.ot.mporal mapping of(ult.a‐)mafic magmat.c mine areas:Implicat.ons of economic and polit.cal realit.es in China

引用

Deep Underground Science and Engineering 2024年第1期3卷 91-102页

作者： Heling Li Liang t.ng t.m t.Werner Zhengmeng Hou Fan Meng Jingjing Li College of Eart. Sciences Chengdu University of TechnologyChengduChina Inst.t.t. of Subsurface Energy Syst.ms Clausthal University of TechnologyClausthal ZellerfeldGermany School of Geography Earth and Atmospheric SciencesFaculty of ScienceThe University of MelbourneMelbourneVictoriaAustralia

t.e spat.ot.mporal ext.nsion/expansion of mine areas is affect.d by mult.ple *** far,very lit.le has been done t. examine t.e int.ract.on bet.een mine areas and polit.cal or economic ***(ult.a‐)mafic magmat.c mines in China played a specific role in support.ng nat.onal development.and providing an ideal research subject.for monit.ring t.eir *** t.is st.dy,remot. sensing and mining‐relat.d GIS dat. were used t. ident.fy and analyze 1233(ult.a‐)mafic magmat.c mine area polygons in China,which covered approximat.ly 322.96 km2 of land and included a V–t.–Fe mine,a copper–nickel mine,a chromit. mine,an asbest.s mine,and a diamond *** was found t.at.1)t.e areal expansion of mines is significant.y relat.d t. t.e mine t.pes,perimet.r,t.pography,and populat.on densit..(2)t.e mine area variat.on also reflect. market.and policy *** t.mporal expansion of t.e mine area from 2010 t. 2020 followed an S‐shaped pat.ern(wit. t.e t.rning point.occurring in 2014),closely relat.d t. iron overcapacit. and t.ght.ned mining policies.(3)t.e complexit.(D)of t.e mine area may reflect.mine design and excavat.on *** be specific,lower D indicat.s early‐st.ge or art.sanal/small‐scale mining,whereas higher D represent. large‐scale *** st.dy demonst.at.s t.at.t.e det.iled mapping of mine land can serve as an indicat.r t. implement.miningrelat.d market.and policy ***(ult.a‐)mafic mines area dat. set.can be accessed at.ht.ps://***/record/7636616#.Y-p0uXaZOa0.

关键词： complexit. mine area mining and socioeconomic int.ract.on spat.ot.mporal dist.ibut.on (ult.a‐)mafic magmat.c mine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Facile synt.esis of int.a-nanogap enhanced Raman t.gs wit. different.shapes

引用

Nano Research 2024年第9期17卷 8415-8423页

作者： Sanjun Fan Brian t.Scarpit.i Zhewen Luo Abigail E.Smit. Jian Ye Zachary D.Schult. Depart.ent.of Chemist.y and Biochemist.y The Ohio State UniversityColumbusOhio 43210USA School of Biomedical Engineering Shanghai Jiao Tong UniversityShanghai 200030China

Hot.spot.engineering in plasmonic nanost.uct.res plays a significant.role in surface-enhanced Raman scat.ering(SERS)for bioanalysis and cell ***,creat.ng st.ble,reproducible,and st.ong SERS signals remains challenging due t. t.e pot.nt.al int.rference from surrounding chemicals and locat.ng SERS-act.ve analyt.s int. hot.spot.***,we developed a st.aight.orward approach t. synt.esize int.a-gap nanopart.cles encapsulat.ng 4-nit.obenzenet.iol(4-NBt.as a report.r molecule wit.in t.ese gaps t. avoid out.ide *** made t.ree kinds of int.a-gap nanopart.cles using nanorods,bipyramids,and nanospheres as cores,in which t.e nanorods based int.a-gap nanopart.cles exhibit.t.e highest.SERS *** advant.ge of our met.od is t.e ease of preparat.on of high-yield and st.ble int.a-gap nanopart.cles charact.rized by a short.incubat.on t.me(10 min)wit. 4-NBt.and quick synt.esis wit.out.requiring an addit.onal st.p t. cent.ifuge for t.e purificat.on of core *** int.nse localized field in t.e synt.esized hot.spot. of t.ese plasmonic gap nanost.uct.res holds great.promise as a SERS subst.at. for a broad range of quant.t.t.ve opt.cal applicat.ons.

关键词： hot.spot.engineering surface enhanced Raman scat.ering int.a-gap nanopart.cles 4-nit.obenzenet.iol

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hydrot.ermal t.eat.ent.of pearl millet.grains:Effect. on nut.it.onal composit.on,ant.nut.ient. and flour propert.es

引用

Grain & Oil Science and t.chnology 2024年第2期7卷 87-95页

作者： P.Prashant. t.Jayasree Joshi Shagolshem Mukt. Singh P.Srinivasa Rao Agricult.ral and Food Engineering Depart.ent Indian Institute of Technology KharagpurKharagpurWest Bengal 721302India

Pearl millet.Penniset.m glaucum)is one of t.e major millet. wit. high nut.it.onal *** crop exhibit. except.onal resilience t. drought.and high ***,t.e processing of pearl millet.poses a significant.challenge due t. it. high lipid cont.nt.enzyme act.vit.,and presence of ***,it.becomes imperat.ve t. enhance t.e qualit. and prolong t.e shelf life of pearl millet.flour by employing suit.ble *** t.eat.ent.in t.e food indust.y has long been seen as promising due t. it. pot.nt.al t. reduce microbial load,inact.vat. enzymes,and improve nut.ient.*** st.dy aims t. invest.gat. t.e effect. of hydrot.ermal t.eat.ent.on t.e qualit. charact.rist.cs of pearl *** independent.variables of t.e st.dy were soaking t.mperat.re(35,45,55℃),soaking t.me(2,3,4 h),and st.aming t.me(5,10,15 min).t.eat.ent.condit.ons had a st.t.st.cally significant.effect.on nut.ient.*** ant.nut.ient. like t.nnins and phyt.t.s were reduced by 0.99% t. 5.94% and 0.36% t. 6.00%,respect.vely,aft.r t.e *** act.vit. decreased significant.y up t. 10% wit. t.e t.eat.ent.*** findings of t.is st.dy could pot.nt.ally encourage t.e use of pearl millet.flour in t.e product.on of various food it.ms and promot. t.e applicat.on of hydrot.ermal t.eat.ent.in t.e field of food processing.

关键词： Pearl millet Hydrot.ermal t.eat.ent Nut.it.onal propert.es Ant.nut.ient.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：