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t.aveling wave solut.ons of t.e nonlinear Gilson-Pickering equat.on in cryst.l lat.ice t.eory

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Journal of Ocean Engineering and Science 2024年第1期9卷 40-49页

作者： A.t.Nguyen O.Nikan Z.Avazzadeh Division of Applied Mat.emat.cs Science and Technology Advanced InstituteVan Lang UniversityHo Chi Minh CityVietnam Facult. of t.chnology Van Lang UniversityHo Chi Minh CityVietnam School of Mat.emat.cs Iran University of Science and TechnologyNarmakTehranIran Depart.ent.of Applied Mat.emat.cs Xi’an Jiaotong-Liverpool UniversitySuzhou 215123China

t.is paper focuses on obt.ining t.e t.aveling wave solut.ons of t.e nonlinear Gilson-Pickering equa-t.on(GPE),which describes t.e prorogat.on of waves in cryst.l lat.ice t.eory and plasma *** solut.on of t.e GPE is approximat.d via t.e finit. difference t.chnique and t.e localized meshless radial basis funct.on generat.d finit. *** associat.on of t.e t.chnique result. in a meshless approach t.at.does not.require linearizing t.e nonlinear *** t.e first.st.p,t.e PDE is convert.d t. a syst.m of nonlinear ODEs wit. t.e help of t.e radial *** t.e second st.p,a high-order ODE solver is adopt.d t. discret.ze t.e nonlinear ODE *** global collocat.on t.chniques pose a considerable comput.t.onl burden due t. t.e calculat.on of t.e dense algebraic *** proposed met.od approx-imat.s different.al operat.rs over t.e local support.domain,leading t. sparse different.at.on mat.ices and decreasing t.e comput.t.onal *** result. and comparisons are provided t. confirm t.e efficiency and accuracy of t.e met.od.

关键词： Nonlinear Gilson–Pickering equat.on Solit.n wave solut.ons Meshless t.chnique RBF LRBF-FD Opt.mal shape paramet.r

Correlat.on of work funct.on and st.cking fault.energy t.rough Kelvin probe force microscopy and nanohardness in dilut.α-magnesium

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Journal of Magnesium and Alloys 2024年第1期12卷 237-250页

作者： Yigit.t.re Ali Arslan Kaya Hüseyin Aydin Jiang Peng Servet.t.ran Eskisehir t.chnical Universit. Porsuk Vocational SchoolElectronics and Automation DepartmentProgram of MechatronicsEskisehirTurkey Mugla Sit.i Kocman Universit. Engineering FacultyMetallurgy and Materials Engineering DepartmentMuglaTurkey Hüseying Aydın TUBITAK MRCTurkey Jiang Peng Chongqing UniversityChina Eskisehir t.chnical Universit. Engineering FacultyMaterials Science and Engineering DepartmentEskisehirTurkey

Elect.onic int.ract.ons of t.e Group 2A element. wit. magnesium have been st.died t.rough t.e dilut. solid solut.ons in binary Mg-Ca,Mg-Sr and Mg-Ba *** invest.gat.on incorporat.d t.e difference in t.e‘Work Funct.on'(ΔWF)measured via Kelvin Probe Force Microscopy(KPFM),as a propert. direct.y affect.d by int.rat.mic bond t.pes,*** elect.onic st.uct.re,nanoindent.t.on measurement.,and St.cking Fault.Energy values report.d in t.e *** was shown t.at.t.e nano-hardness of t.e solid-solut.onα-Mg phase changed in t.e order of Mg-Ca>Mg-Sr>***,it.was shown,by also considering t.e nano-hardness levels,t.at.SFE of a solid-solut.on is closely correlat.d wit. it.‘Work Funct.on'***-hardness measurement. on t.e eut.ct.cs andΔWF difference bet.een eut.ct.c phases enabled an assessment.of t.e relat.ve bond st.engt. and t.e pert.nent.elect.onic st.uct.res of t.e eut.ct.cs in t.e t.ree *** wit.ΔWF and at.least.qualit.t.ve verificat.on of t.ose comput.d SFE values wit. some experiment.l measurement.t.chniques were considered import.nt.as t.ose comput.t.onal met.ods are based on zero Kelvin degree,relat.vely simple at.mic models and a number of *** assert.d by t.is invest.gat.on,if t.e result. of measurement.t.chniques can be qualit.t.vely correlat.d wit. t.ose of t.e comput.t.onal met.ods,it.can be possible t. evaluat. t.e elect.onic st.uct.res in alloys,st.rt.ng from binary syst.ms,going t. t.rnary and t.en mult.-element.l *** invest.gat.on has shown t.at.such a qualit.t.ve correlat.on is *** all,t.e SFE values are not.t.eat.d as absolut. values but.rat.er become essent.al in comparat.ve invest.gat.ons when assessing t.e influences of alloying element. at.a fundament.l level,t.at.is,free elect.on densit. *** st.dy indicat.d t.at.t.e principles of‘elect.onic met.llurgy'in developing mult.-element.l alloy syst.ms can be followed via pract.cal experiment.l met.ods,i.e.ΔWF measurement. using KPF

关键词： Mg alloys Dilut. alloys Work funct.on St.cking fault.energy Kelvin probe force microscopy Short.range order Miedema Nanoindent.t.on Eut.ct.cs

Increasing polymer scission rat. by t.ing an overhand knot

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Science China Chemist.y 2024年第11期67卷 3498-3499页

作者： Yuheng Hu Jennifer t.Ou Jim Y.Huang Yuanning Feng Depart.ent.of Chemist.y and Biochemist.y The University of Oklahoma

Similar t. t.e phenomenon of knot.ed ropes in life, knot.ed climbing ropes will reduce t.eir st.engt. due t. knot.. Alt.ough comput.r simulat.ons [1], t.eoret.cal speculat.on[2,3], and int.it.on [3] suggest.t.at.similar processes may occur at.t.e nanoscale, t.is hypot.esis has not.been experiment.lly proven before. Wit. t.e increasing mat.rit. of molecular recognit.on and self-assembly, a research communicat.on by Leigh et.al. [4] published in Nat.re Chemist.y int.oduced a molecular overhand knot.int. a polymer t. st.dy it. effect.on t.e scission rat. of t.e polymer chain under t.nsion.

关键词：

Get.ing t.e Most.Out.of Every t.aining Day: t.e Influence of Inst.uct.rs on Self-Regulat.d Learning During Firefight.r Leadership Courses

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Int.rnat.onal Journal of Disast.r Risk Science 2024年第3期15卷 332-345页

作者： St.fan R?seler Micha Hilbert.Guido Hert.l Meinald t.t.ielsch Depart.ent.of Psychology University of Münster

Leadership courses in t.e fire services are highly challenging, and t.ey can seriously exhaust.t.ainees and hamper t.eir selfregulat.d learning effort.(for example, set.ing goals, focusing at.ent.on, seeking feedback). We t.eorize t.at.experiences of failure or overload can curt.il t.ainees' available energy resources on subsequent.t.aining days, which, in t.rn, should affect.t.ainees' learning effort.. Given inst.uct.rs' cent.al role in leadership courses, we hypot.esize t.at.support.ve and humble inst.uct.r behaviors decrease experiences of failure and overload and, t.us, increase self-regulat.d learning. Moreover, we argue t.at.support.ve inst.uct.r behavior may amplify t.e posit.ve effect. of high energy resources, while humble behavior may alleviat. t.e negat.ve impact.of low resource levels. We t.st.d preregist.red hypot.eses wit. 118 firefight.rs part.cipat.ng in t.o-week leadership courses at.a German fire academy. t.e part.cipant. complet.d short.web-based quest.onnaires before and aft.r classes each day. Mult.level analyses confirmed t.at.perceived daily support.ve and humble inst.uct.r behavior predict.d t.ainees' report. of daily self-regulat.d learning act.vit.. Not.bly, t.is effect.was independent.from posit.ve effect. of t.ainees' report.d energy resources in t.e morning. Support.ve and humble behavior did not.moderat. t.e eff ect.of energy resources. Our findings suggest.t.at.inst.uct.rs play a crucial role in facilit.t.ng effect.ve learning under challenging t.aining condit.ons. Furt.ermore, we offer implicat.ons for leaders in fire services, who oft.n conduct.t.ainings wit. t.eir subordinat.s.

关键词： Diary st.dy Fire services Inst.uct.r behavior Leadership t.aining Resource invest.ent

Efficient.guiding and focusing of int.nse laser pulse using periodic t.in slit.

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Mat.er and Radiat.on at.Ext.emes 2024年第4期9卷 29-39页

作者： L.Xu t.W.Huang K.Jiang C.N.Wu H.Peng P.C.hen R.Li H.B.Zhuo C.t.Zhou Shenzhen Key Laborat.ry of Ult.aint.nse Laser and Advanced Mat.rial t.chnology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slit. have been widely used in laser-plasma int.ract.ons as plasma opt.cal component. for generat.ng high-harmonic light.and cont.olling laser-driven part.cle ***,we propose and demonst.at. t.at.periodic t.in slit. can be regarded as a new breed of opt.cal element. for efficient.focusing and guiding of int.nse laser *** fundament.l physics of int.nse laser int.ract.on wit. t.in slit. is st.died,and it.is revealed t.at.relat.vist.c effect. can lead t. enhanced laser focusing far beyond t.e pure diffract.ve focusing *** addit.on,t.e int.ract.on of an int.nse laser pulse wit. periodic t.in slit. makes it.feasible t. achieve mult.fold enhancement.in bot. laser int.nsit. and energy t.ansfer efficiency compared wit. convent.onal *** result. provide a novel met.od for manipulat.ng ult.a-int.nse laser pulses and should be of int.rest.for many laser-based applicat.ons.

关键词： laser pulse int.nse

Boost.ng t.e cat.lyt.c act.vit. t.ward oxygen reduct.on via a het.rost.uct.re of porous iron oxide-decorat.d 2D NiO/NG nanosheet.

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Journal of Energy Chemist.y 2024年第6期93卷 669-681,I0016页

作者： Kakali Mait. Mat.hew t.Curnan Hyung Jun Kim Kyeounghak Kim Jeong Woo Han Depart.ent.of Chemical Engineering Pohang University of Science and Technology(POSTECH)PohangGyeongbuk 37673Republic of Korea Depart.ent.of Mat.rials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoul 08826Republic of Korea Depart.ent.of Chemical Engineering Clean-Energy Research InstituteHanyang UniversitySeoul 04763Republic of Korea CSIR-Inst.t.t. of Minerals and Mat.rials t.chnology RRL CampusAcharya ViharBhubaneswarOdisha 751013India

As a noble met.l subst.t.t.,t.o-dimensional(2D)hierarchical nano-frame st.uct.res have at.ract.d great.int.rest.as candidat. cat.lyst. due t. t.eir remarkable advant.ges-high int.insic act.vit.,high elect.on mobilit.,and st.aight.orward surface ***,t.ey may replace Pt.based cat.lyst. in oxygen reduct.on react.on(ORR)***,a simple met.od is developed t. design hierarchical nano-frame st.uct.res assembled via 2D NiO and N-doped graphene(NG)*** procedure can yield nanost.uct.res t.at.sat.sfy t.e crit.ria correlat.d wit. improved elect.ocat.lyt.c performance,such as large surface area,numerous undercoordinat.d at.ms,and high defect.***,porous NG nanosheet.archit.ct.res,feat.ring NiO nanosheet. densely coordinat.d wit. accessible holey Fe_(2)O_(3) moiet.es,can enhance mesoporosit. and balance *** improvement. can facilit.t. charge t.ansport.and expose formerly inaccessible react.on sit.s,maximizing act.ve sit. densit. *** funct.onal t.eory(DFt.calculat.ons reveal favored O_(2) adsorpt.on and dissociat.on on Fe_(2)O_(3) hybrid st.uct.res when support.d by 2D NiO and NG nanomat.rials,given 2D mat.rials donat.d charge t. Fe_(2)O_(3) act.ve *** syst.mat.c st.dies reveal t.at.synergist.c cont.ibut.ons are responsible for enriching t.e cat.lyt.c act.vit. of Fe_(2)O_(3)@NiO/NG in alkaline media-encompassing int.rnal voids and pores,unique hierarchical support.st.uct.res,and concent.at.d N-dopant.and bimet.llic at.mic ***,t.is work expands t.e t.olbox for designing and synt.esizing highly efficient.2D/2D shelled funct.onal nanomat.rials wit. t.ansit.on met.ls,endeavoring t. benefit.energy conversion and relat.d ORR applicat.ons.

关键词： N-doped graphene Holey Fe_(2)O_(3)nanocryst.ls NiO nanosheet. High cat.lyt.c performance ORR

t.chnological advancement. in millet.dehulling and polishing process: An insight.int. pret.eat.ent.met.ods, machineries and impact.on nut.it.onal qualit.

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Grain & Oil Science and t.chnology 2024年第3期7卷 186-195页

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

Millet. are widely recognized for t.eir nut.it.onal significance;however, t.e met.ods employed for t.eir processing are current.y lacking. t.is art.cle primarily focuses on t.e advanced t.chnologies and progressions in millet.dehulling and polishing. t.ese t.chnologies operat. based on t.e fundament.l principles of compression-shearing, abrasion-frict.on, and cent.ifugal-impact.forces. Processing of millet. can be challenging because of t.e physical charact.rist.cs and t.ght.at.achment.of hull and bran t. t.e endosperm. However, several dehullers have been designed t. solve t.is problem for different.kinds of millet.. In addit.on, t.e nut.it.onal and ant.-nut.it.onal charact.rist.cs undergo alt.rat.ons due t. bot. dehulling and polishing processes. t.ese alt.rat.ons are t.oroughly examined and discussed in t.is art.cle. Specifically, ant.-nut.ient. such as t.nnins and phyt.t. are predominant.y found in t.e out.r pericarp of t.e grain and experience a reduct.on aft.r undergoing dehulling and polishing. t.e nut.it.onal propert.es are also subject.d t. a reduct.on;however, t.is reduct.on can be mit.gat.d by subject.ng t.e grains t. cert.in pret.eat.ent. before dehulling and polishing. t.ese t.eat.ent. serve t. enhance dehulling efficiency and nut.ient.digest.bilit. while simult.neously reducing t.e presence of ant.-nut.ient.. Novel t.ermal and non-t.ermal met.odologies such as microwave, hydrot.ermal, high-pressure processing, and ohmic heat.ng can be employed for processing millet., t.ereby diminishing t.e loss of nut.ient.. Addit.onal research can be carried out.t. invest.gat. t.eir impact.on t.e dehulling and polishing of millet..

关键词： Millet. Dehulling Polishing Pret.eat.ent Novel t.ermal and non-t.ermal t.chniques

Aerodynamics of a t.ndem-Bladed Axial Compressor Rot.r under Circumferent.al Dist.rt.on at.Different.Rot.t.onal Speeds

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Journal of t.ermal Science 2024年第4期33卷 1340-1356页

作者： Amit.KUMAR Jerry t.JOHN A.M.PRADEEP R.A.DAKKERMANS Dragan KOZULOVIC Depart.ent.of Aerospace Engineering Indian Institute of Technology BombayMumbai400076India Depart.ent.of Aut.mot.ve and Aeronaut.cal Engineering Hamburg University of Applied Sciences20099HamburgGermany Inst.t.t. of Jet.Propulsion Bundeswehr University Munich85577NeubibergGermany

For most.aircraft.engines,inflow dist.rt.on is *** dist.rt.on is known t. degrade t.e aerodynamic performance and st.ble operat.ng limit. of a *** rot.r configurat.on is an arrangement.t.at.effect.vely cont.ols t.e growt. of t.e boundary layer over t.e suct.on surface of t.e ***,a higher t.t.l pressure rise can be achieved t.rough t.is unconvent.onal design approach involving t.e split.ing of t.e blade int. forward and aft.*** is expect.d t.at.t.e effect.of inlet.flow dist.rt.on would be more severe for a t.ndem-rot.r design due t. t.e great.r flow t.rning inherent.in such ***,t.is aspect.needs t. be t.oroughly *** present.st.dy discusses t.e effect.of circumferent.al dist.rt.on on t.e t.ndem-rot.r at.different.rot.t.onal ***-annulus RANS simulat.ons using ANSYS CFX are used in t.e present.*** performance of t.e rot.r at.a part.cular flow coefficient.and different.rot.t.onal speeds is *** t.t.l pressure and efficiency are observed t. drop at.lower mass flow rat.s under t.e influence of circumferent.al *** loss region in each blade passage is mainly associat.d wit. t.e blade wake,t.p leakage vort.x,secondary flow,and boundary ***,t.eir cont.ibut.on varies from passage t. passage,part.cularly in t.e dist.rt.d *** t.e lower span,t.e wake widt. is found t. be higher t.an t.at.at.a higher *** t. t.e redist.ibut.on of t.e mass flow,t.e circumferent.al ext.nt.reduces at.a higher *** t.e undist.rt.d sect.r,t.e st.engt. of t.e t.p leakage vort.x is significant.y higher at.t.e design rot.t.onal speed t.an at.lower *** dist.rt.on near t.e t.p region promot.s an early vort.x breakdown even at.t.e design operat.ng *** adversely affect. t.e t.t.l pressure,efficiency,and st.ll *** clean flow condit.ons,t.is phenomenon is only observed near t.e st.ll *** t.e design operat.ng condit.on,t.e breakdown of t.e forward rot.r t.p l

关键词： t.ndem rot.r circumferent.al dist.rt.on loss t.p leakage vort.x vort.x breakdown diffusion fact.r aerodynamics of compressor blade

Reply t. t.e not. by Li Piani et.al.

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Defence t.chnology（防务技术） 2024年第1期31卷 603-606页

作者： t.Li Piani J.Weerheijm L.J.Sluys t. Delft Stevinweg 12628 CNDelftthe Netherlands t.O PO Box 452280 AARijswijkthe Netherlands NLDA Faculty of Military Sciences1781 CADen Helderthe Netherlands

In 2017,a ballist.c phenomenological model was proposed by t.e aut.ors of Ref.[1] t. numerically simulat. t.e experiment.l dept.s of small caliber project.les impact.ng walls made of *** opport.nit. for a new model in t.e field revealed from t.e observat.on t.at.t.o older models recent.y used by t.e aut.ors of Ref.[2] shared a linear relat.onship bet.een t.e penet.at.on dept. P and t.e impact.ng velocit. v_(O).

关键词： Penet.at.on Adobe Modeling