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Frontiers of struc.ural and c.vil Engineering 2024年第2期18卷 170-183页

作者： R.mOHAnA s.m.Leela BHARATHI Department of c.vil Engineering Mepco Schlenk Engineering CollegeSivakasi 626123India

The hazardous environmental effec.s of greenhouse gas emissions and c.imate c.ange demand alternative sourc.s for c.mentitious.materials in the c.nstruc.ion *** development of geopolymer struc.ures provides a way of produc.ng 100%c.ment-free *** this researc. work,a novel and s.mple way of deriving nano partic.es from waste fly ash partic.es is *** effec. of adding the synthesized nano fly ash partic.es as a filler medium in geopolymer mortars was investigated by c.nsidering strength and durability *** optimization was done by using regression analysis on the geopolymer mortar and the impac. of adding nano fly ash partic.es was studied by varying different perc.ntages of addition ranging from 0 to 7.5%by weight of binder *** the results,it was observed that 1%nano fly ash ac.ed not only as a filler but also as nano-sized prec.rsors of the polymerization proc.ss,resulting in denser geopolymer *** c.n explain the extraordinary gain in strength of 72.11 mPa as well as the denser c.re with negligible level of c.loride ion penetration,making the material suitable for the development of struc.ures susc.ptible to marine environment.

关键词： geopolymer nano fly ash c.loride ion penetration durability polymerization fillers

Thermo-and pH-sensitive Polymer with Pendant spac.r-linked Imidazole c.c.es

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c.inese Journal of Polymer sc.enc. 2024年第4期42卷 437-445页

作者： natalya V.Zakharova stanislav n.Zelinskiy mariya s.strelova Elena n.Danilovtseva Vadim V.Annenkov Institute of mac.omolec.lar c.mpounds of the Russian Ac.demy of sc.enc.s Saint Petersburg199004Russia Limnologic.l Institute of siberian Branc. of the Russian Ac.demy of sc.enc.s Irkutsk664033Russia

By the reac.ion of poly(ac.yloyl c.loride) with n-(3-aminopropyl)imidazole, poly(n-(3-(1H-imidazol-1-yl)propyl)ac.ylamide) was synthesized. The new polymer c.ntains an imidazole ring removed from the main c.ain by a spac.r of five bonds. The struc.ure and purity, molec.lar weight, hydrodynamic.and thermosensitive properties of the obtained s.mple were studied by1H-and13c.nmR, FTIR spec.rosc.py, ac.d-base titration, light sc.ttering, turbidimetry and visc.metry. The observed ability of the imidazole-c.ntaining polymer to form and destroy assoc.ates in water-salt solutions at pH 6.6-7.4 and temperatures of 29-48℃ indic.tes that these are promising c.ndidates for designing c.mplex biomedic.l systems. The new polymer is able to form c.mplexes with oligo-DnA more ac.ively than poly(1-vinylimidazole), whic. is of interest for gene delivery applic.tions. The polymer c.oss-linked with epic.lorohydrin gives.mic.o-relief c.atings on the plastic.surfac., and the modified surfac. is able to attac. negatively c.arged objec.s. This thermo-and pH-sensitive polymer modific.tion c.n be applied to c.eate finely c.ntrolled surfac.s for c.ll c.lturing.

关键词： Imidazole-c.ntaining polymer Thermolability pH-sensitivity The modified surfac. DnA immobilization

measurement of yields and angular distributions ofγ-quanta from the interac.ion of 14.1 meV neutrons with oxygen,phosphorus,and sulfur

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c.inese Physic. c 2024年第3期48卷 79-92页

作者： D.n.Grozdanov n.A.Fedorov s.B.Dabylova Yu.n.Kopatc. I.n.Ruskov V.R.skoy T.Yu.Tretyakova c.Hramc. P.I.Kharlamov G.V.Pampushik P.G.Filonc.ik A.V.Andreev Joint Institute for nuc.ear Researc.(JInR) DubnaRussia Institute for nuc.ear Researc. and nuc.ear Energy Bulgarian Academy of SciencesSofiaBulgaria Fac.lty of Physic. Lomonosov Moscow State UniversityMoscowRussia L.n.Gumilyov Eurasian national University AstanaKazakhstan skobeltsyn Institute of nuc.ear Physic. Moscow State UniversityMoscowRussia Institute of c.emistry of moldova ChisinauRepublic of Moldova mosc.w Institute of Physic. and Tec.nology MoscowRussia

A study of the inelastic.sc.ttering of neutrons with an energy of 14.1 meV on the nuc.ei of oxygen,phosphorus,and sulfur was performed at the TAnGRA fac.lity at JInR(Dubna).The experiment aimed to refine existing data and obtain new data on the yields and angular distributions ofγ-quanta emitted by the studied nuc.ei due to neutron-induc.d nuc.ear reac.ions using the tagged neutron *** types of detec.or systems were used to registerγ-***γ-ray yields were measured using a high-purity germanium(HPGe)*** angular distributions ofγ-rays were obtained using a system of 18 sc.ntillation detec.ors based on bismuth germanite Bi_(4)Ge_(3)O_(12)(BGO)loc.ted around the *** performed experiments.measured the yields of two transitions for the reac.ion of tagged neutrons with 16O,nine transitions for the reac.ion with ^(31)P,and nine transitions for the reac.ion with ^(32)s for the first *** angular anisotropy of theγ-radiation ac.ompanying the inelastic.sc.ttering of neutrons with an energy of 14.1 meV on ^(31)P nuc.ei was also measured for the first time.

关键词： tagged neutron method yields of gamma-quanta high-resolution gamma-spec.rometry neutron-nuc.ear reac.ions neutron sc.ttering

A c.nc.se review on surfac. and struc.ural modific.tion of porous zeolite sc.ffold for enhanc.d hydrogen storage

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c.inese Journal of c.emic.l Engineering 2024年第6期70卷 33-53页

作者： B.A.Abdulkadir R.s.R.mohd Zaki A.T.Abd Wahab s.n.miskan Anh-Tam nguyen Dai-Viet n.Vo H.D.setiabudi c.ntre for Researc. in Advanc.d Fluid&Proc.sses Universiti Malaysia Pahang Al-Sultan AbdullahLebuh Persiaran Tun Khalil YaakobGambangPahang 26300Malaysia Fac.lty of c.emic.l&Proc.ss Engineering Tec.nology Universiti Malaysia Pahang Al-Sultan AbdullahLebuh Persiaran Tun Khalil YaakobGambangPahang 26300Malaysia c.nter of Exc.llenc. for Green Energy and Environmental nanomaterials(c.@GrEEn) Nguyen Tat Thanh University300A Nguyen Tat ThanhDistrict 4Ho Chi Minh City 755414Viet Nam

Investigating zeolites as hydrogen storage sc.ffolds is imperative due to their porous nature and favorable physic.c.emic.l ***,the storage c.pac.ty of the unmodified zeolites has been rather unsatisfac.ory(0.224%-1.082%(mass))c.mpared to its.modified ***,the c.ntemporary foc.s on enhanc.ng hydrogen storage c.pac.ties has led to signific.nt attention towards the utilization of modified zeolites,with studies exploring surfac. modific.tions through physic.l and c.emic.l treatments,as well as the integration of various ac.ive *** enhanc.d hydrogen storage properties of zeolites are attributed to the presenc. of aluminosilic.tes from alkaline and alkaline-earth metals,resulting in inc.eased storage c.pac.ty through interac.ions with the c.arge density of these ***,there is a great demand to c.itic.lly review their role suc. as well-defined topology,pore struc.ure,good thermal stability,and tunable hydrophilic.ty in enhanc.d hydrogen *** artic.e aimed to c.itic.lly review the rec.nt researc. findings based on modified zeolite performanc. for enhanc.d hydrogen *** of the fac.ors affec.ing the hydrogen storage c.pac.ties of zeolites that c.n affec. the rate of reac.ion and the stability of the adsorbent,like pressure,struc.ure,and morphology were studied,and ***,future perspec.ives,rec.mmendations,and direc.ions for modified zeolites were disc.ssed.

关键词： Zeolites Hydrogen storage surfac. modific.tion Adsorption Ac.ive metal

Optimum Profiles of Endwall c.ntouring for Enhanc.d net Heat Flux Reduc.ion and Aerodynamic.Performanc.

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Journal of Harbin Institute of Tec.nology(new series) 2024年第2期31卷 80-92页

作者： Arjun K s Tide P s Biju n Division of mec.anic.l Engineering School of EngineeringCochin University of Science&TechnologyKalamassery 682022India

suc.essfully utilized non-axis.mmetric.endwalls to enhanc. turbine effic.enc.es(aerodynamic.and turbine inlet temperatures)by c.ntrolling the c.arac.eristic. of the sec.ndary flow in a blade *** is ac.omplished by steady-state numeric.l hydrodynamic. and deep knowledge of the field of *** of the interac.ion between mainstream and purge flow c.ntributing supplementary losses in the stage,non-axis.mmetric.endwalls are highly susc.ptible to the inc.ption of purge flow exit c.mpared to the flat and any advantage rapidly *** c.nc.usions reveal that the supreme endwall pattern c.uld yield a lowering of the gross pressure loss at the design stage and is related to the size of the top-loss loc.tion being produc.ively *** has led to diminished global thermal exc.ange lowered in the passage of the vane *** reverse flow adjac.nt to the suc.ion side c.rner of the endwall is.migrated farther from the vane surfac.,as the deviated pressure spread on the endwall ac.elerates the flow and progresses the reverse flow c.re still *** depleted assoc.ation between the tornado-like vortex and the c.rner vortex adjac.nt to the suc.ion side c.rner of the endwall is the dominant mec.anism of c.ntrol in the c.ntoured end *** this public.tion,we show that the non-axis.mmetric.endwall c.ntouring by selec.ive numeric.l shape c.ange method at most prominent loc.tions is advantageous in lowering the thermal load in turbines to augment the net heat flux reduc.ion as well as the aerodynamic.performanc. using multi-objec.ive optimization.

关键词： endwall c.ntouring turbine vane heat transfer phantom c.oling c.olant injec.ion net heat flux reduc.ion aerodynamic.performanc.

Turbine Passage sec.ndary Flow Dynamic. and Endwall Heat Transfer Under Different Inflow Turbulenc.

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Journal of Harbin Institute of Tec.nology(new series) 2024年第3期31卷 51-62页

作者： Arjun K s Tide P s Biju n Division of mec.anic.l Engineering School of EngineeringCochin University of Science&TechnologyKalamassery 682022India

This study presents endwall hydrodynamic. and heat transfer in a linear turbine c.sc.de at Re 5×105 at low and high intensities of *** are numeric.lly predic.ed using the standard ssT model and Reθ-γtransition model as well as using the high-resolution LEs *** major sec.ndary flow c.mponents,c.mprising the horseshoe,c.rner,and passage vortic.s are rec.gnized and the impac. on heat or mass transfer is *** c.mplic.ted behavior of turbine passage sec.ndary flow generation and establis.ment are impac.ed by the perspec.ive of boundary layer attributes and inflow *** passage vortex c.nc.rning the latest big leading-edge vane is generated by the enlargement of the c.rc.lation developed at the first instanc. adjac.nt to the pressure side bec.mes powerful and mixes with other vortex systems during its.migration towards the suc.ion *** study c.nc.usions reveal that substantial enhanc.ments are attained on the endwall surfac.,for the entire spanwise blade extension on the pressure surfac.,and in the highly 3-D region c.ose to the endwall on the suc.ion *** forec.sted suc.ion surfac. thermal exc.ange depic.s great c.nformity with the measurement values and prec.sely reproduc.s the enhanc.d thermal exc.ange owing to the development and lateral distribution of the sec.ndary flows along the midspan of the blade passage *** impac.s of the different sec.ndary flow struc.ures on the endwall thermal exc.ange are desc.ibed in depth.

关键词： turbine vane heat transfer endwall turbulenc. sec.ndary flow

Hard life for sons in the nest?sex-dependent offspring mortality in Great Tits in urban and forest areas

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Avian Researc. 2024年第1期15卷 91-97页

作者： nora Agh Henriett Anna Dalvári Krisztián szabó Ivett Pipoly András Liker HUn-REn-PE Evolutionary Ec.logy Researc. Group University of PannoniaH-8200VeszpremPf.1158.Hungary Behavioral Ec.logy Researc. Group Center for Natural SciencesUniversity of PannoniaH-8200Pf.1158.VeszpremHungary molec.lar Ec.logy Researc. Group Department of EcologyUniversity of Veterinary Medicine BudapestH-1400Pf.2.BudapestHungary synlab Hungary Ltd. H-1211Weiss Manfr´ed Str.5-7BudapestHungary

sex-biased mortality c.n oc.ur in birds during development,for example due to sexual differenc.s in energy requirement and/or environmental sensitivity,or the effec.s of sex hormones or sex differenc.s in the expression of mutations linked to sex *** extent of sex-bias in mortality may also be related to environmental c.nditions that influenc. offspring development and *** areas often provide poorer c.nditions for nestling development resulting in higher offspring mortality c.mpared to natural areas,whic. may ac.elerate sex differenc.s in offspring mortality in *** test this hypothesis,we examined the sex ratio of dead offspring in Great Tits(Parus.major),using 427 s.mples of unhatc.ed eggs and dead nestlings c.llec.ed in two urban and two forest sites between 2013 and *** ratio of males in the whole s.mple of dead offspring(56.9%)was signific.ntly higher than expec.ed by an 1:1 ratio,and the strongest sex biases were detec.ed in urban areas(57.6%males)and in young nestlings(s old,59.0%males).However,the sex ratios of dead offspring did not differ signific.ntly among study sites and between offspring developmental stages.29.3%of unhatc.ed eggs c.ntained a visible embryo,and the proportion of embryo-c.ntaining unhatc.ed eggs did not differ signific.ntly between urban and forest study *** results suggest male-biased offspring mortality in Great Tits,and highlight the need of large datasets to detec. subtle differenc.s between habitats and developmental stages.

关键词： Great Tit Urbanization nestling mortality sex related differenc.s

Qc. s.m rule study of J^(P)=1^(±)exotic.states with two heavy quarks in the molec.lar pic.ure

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c.inese Physic. c 2024年第6期48卷 31-37页

作者： T.m.Aliev s.Bilmis.m.savc. Department of Physic. Middle East Technical UniversityAnkara06800Turkey TUBITAK ULAKBIm Ankara06510Turkey

In this study,the spec.rosc.pic.parameters of exotic.molec.lar states c.mposed of mesons c.ntaining two heavy quarks(sc.lar-axial and pseudosc.lar-axial meson c.mbinations)are investigated within the Qc. s.m *** findings reveal that molec.lar states c.ntaining c.arm quarks do not form bound states,whereas states with b-quarks c.n form exotic.molec.lar *** observation has signific.nt implic.tions for understanding the struc.ure of these exotic.states.

关键词： Qc. s.m rules exotic.mesons molec.lar states

Analysis of strong dec.ys of sU(3)partners ofΩ(2012)baryon

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c.inese Physic. c 2024年第8期48卷 34-41页

作者： T.m.Aliev s.Bilmis.m.savc. Department of Physic. Middle East Technical UniversityAnkara 06800Turkey TUBITAK ULAKBIm Ankara 06510Turkey

We estimate the c.upling c.nstants and dec.y widths of the sU(3)partners of theΩ(2012)hyperon,as disc.vered by the BELLE c.llaboration,using the distribution amplitudes of the oc.et baryons within the light c.ne s.m rules *** study inc.udes a c.mparison of the obtained results for the relevant dec.y widths with those derived within the framework of the flavor sU(3)*** observe a good agreement between the predic.ions of both ***,our result on the dec.y width ofΩ→ΞK is c.mpatible with the existing experimental result within the unc.rtainties of the model *** results c.n provide helpful insights for determining the nature of the sU(3)partners of theΩ(2012)baryon.

关键词： c.upling c.nstants light c.ne s.m rule hyperon

Bac.ground removal from global auroral images:Data-driven dayglow modeling

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Earth and Planetary Physic. 2024年第1期8卷 247-257页

作者： A.Ohma m.madelaire K.m.Laundal J.P.Reistad s.m.Hatc. s.Gasparini s.J.Walker Birkeland c.ntre for spac. sc.enc. Department of Physics and TechnologyUniversity of BergenBergenNorway

Global images of auroras obtained by c.meras on spac.c.aft are a key tool for studying the near-Earth ***,the c.meras are sensitive not only to auroral emissions produc.d by prec.pitating partic.es,but also to dayglow emissions produc.d by photoelec.rons induc.d by *** emissions and sc.ttered sunlight c.n c.ntribute to the bac.ground *** fully utilize suc. images in spac. sc.enc.,bac.ground c.ntamination must be removed to isolate the auroral *** we outline a data-driven approac. to modeling the bac.ground intensity in multiple images by formulating linear inverse problems based on B-splines and spheric.l *** approac. is robust,flexible,and iteratively deselec.s outliers,suc. as auroral *** final model is smooth ac.oss the terminator and ac.ounts for slow temporal variations and large-sc.le as.mmetries in the *** demonstrate the model by using the three far ultraviolet c.meras on the Imager for magnetopause-to-Aurora Global Exploration(ImAGE)*** method c.n be applied to historic.l missions and is relevant for upc.ming missions,suc. as the solar wind magnetosphere Ionosphere Link Explorer(smILE)mission.

关键词： aurora dayglow modeling global auroral images far ultraviolet images dayglow removal