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Spher.cally Symmetr.c Pr.blem of Gener.l r.lativ.ty for.a Fluid Spher.

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Jour.al of Moder. Physics 2024年第4期15卷 401-415页

作者： v.ler. v. v.siliev.Leonid v. Fedor.v Institute of Applied Mechanics of r.ssian Academy of Sciences Moscow Russia

The paper.is dev.ted to a spher.cally symmetr.c pr.blem of Gener.l r.lativ.ty (Gr. for.a fluid spher.. The pr.blem is solv.d within the fr.mewor. of a special geometr. of the r.emannian space induced by gr.v.tation. Accor.ing to this geometr., the four.dimensional r.emannian space is assumed to be Euclidean with r.spect to the space coor.inates and r.emannian with r.spect to the time coor.inate. Such inter.r.tation of the r.emannian space allows us to obtain complete set of Gr.equations for.the exter.al empty space and the inter.al spaces for.incompr.ssible and compr.ssible per.ect fluids. The obtained analytical solution for.an incompr.ssible fluid is compar.d with the Schwar.child solution. For.a spher. consisting of compr.ssible fluid or.gas, a numer.cal solution is pr.sented and discussed.

关键词： Gener.l r.lativ.ty Spher.cally Symmetr.c Pr.blem Fluid Spher.

Self-power.d stimuli r.sponsiv. mater.al for.dual stimulation of heat and guest molecules

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Chinese Chemical Letter. 2024年第2期35卷 590-593页

作者： Jintao Men Ke Xu Taiting sha Lei He Yan Xu Jie Mu Tijian Yin Qiong Ye Jiangsu Key Labor.tor. for.Science and Applications of Molecular.Fer.oelectr.cs and School of Chemistr. and Chemical Engineer.ng Southeast UniversityNanjing 211189China

Stimuli-r.sponsiv. smar. mater.als exhibit r.v.r.e chemical/physical changes in r.sponse to exter.al stimuli and r.sear.h on stimuli-r.sponsiv. smar. mater.als with self-power.d pr.per.ies is still uncultiv.ted ***,we r.por. per.v.kite cr.stalline self-power.d multiple stimuli-r.sponsiv. mater.als tr.gger.d by chemical and ther.al stimuli.[HMEP]PbI_(3)·(H_(2)O)(1;HMEP is a hydr.xytr.s(1-methylethyl)phosphor.s cation)cr.stallizes in a chir.l space gr.up P 21 at 293 K and has the piezoelectr.c r.action(d_(33)=10 pC/N and output v.ltage=1 v.of self-power.d modes,this v.lue is lar.er.than the v.lue of 3 pC/N for.the classical piezoelectr.c mater.al *** mater.als can gener.te ener.y due to mechanical defor.ation,and using ther.al heating to lose water.[HMEP]PbI_(3)(2)can be obtained.2 cr.stallizes in the non-centr.symmetr.c space gr.up,under.oes two r.v.r.ible phase tr.nsitions at 243/255 K and 315/348 K,and shows second har.onic gener.tion ***,2 can r.tur. to the hydr.ted for. 1 after.absor.ing *** wor. will lay the foundation for.self-power.d stimuli-r.sponsiv. compounds and contr.bute to the constr.ction of nov.l or.anic-inor.anic hybr.d mater.als with second har.onic gener.tion switching.

关键词： Self-power.d Dual stimulation r.activ. Phase tr.nsition SHG switch Or.anic-inor.anic hybr.d per.v.kite

Stability Analysis of DC Micr.gr.d Cluster. Based on Step-by-step System Matr.x Building Algor.thm

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Jour.al of Moder. Power.Systems and Clean Ener.y 2024年第3期12卷 900-912页

作者： K.Jithin N.Mayadev. r.Har. Kumar.v.P.Mini the Depar.ment of Electr.cal Engineer.ng College of Engineering TrivandrumAPJ Abdul Kalam Technological University(APJAKTU)ThiruvananthapuramIndia

DC micr.gr.ds(DCMGs)ar. made up of a networ. of sour.es and loads that ar. connected by a number.of power.electr.nic conv.r.er.(PECs).The incr.ase in the number.of these PECs instigates major.concer.s in system *** inter.onnecting the micr.gr.ds to for. a cluster.the system stability must be *** paper.pr.poses a nov.l stepby-step system matr.x building(SMB)algor.thm to update the system matr.x of an existing DCMG cluster.when a new micr.gr.d is added to the cluster.thr.ugh a distr.bution *** stability of the indiv.dual DCMGs and the DCMG cluster.is analyzed using the eigenv.lue ***,the par.icle swar. optimization(PSO)algor.thm is used to r.tune the contr.ller.gains if the newly for.ed cluster.is not *** simulation of the DCMG cluster.is car.ied out in MATLAB/Simulink env.r.nment to test the pr.posed *** r.sults ar. also v.lidated using the OP4510 r.al-time simulator.r.S).

关键词： Conv.r.er DC micr.gr.d cluster eigenv.lue inter.onnection par.icle swar. optimization system stability system matr.x

Effect of differ.nt dr.ing methods on the amino acids,α-dicar.onyls and v.latile compounds of r.pe bee pollen

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Food Science and Human Wellness 2024年第1期13卷 517-527页

作者： Yanxiang Bi Jiabao Ni Xiaofeng Xue Zidan Zhou Wenli Tian v.lér.e Or.at sha Yan Wenjun Peng Xiaoming Fang State Key Labor.tor. of r.sour.e Insects Institute of Apicultural ResearchChinese Academy of Agricultural SciencesBeijing 100093China College of Engineer.ng China Agricultural UniversityBeijing 100083China Bior.sour.e Engineer.ng Dept. McGill UniversitySte-Anne-de-Bellevue QC H9X 3V9Canada

The significant demand for.high quality food has motiv.ted us to adopt appr.pr.ate pr.cessing methods to impr.v. the food nutr.tional quality and *** this study,the effects of fiv. dr.ing methods,namely,pulsed v.cuum dr.ing(Pv.),fr.eze dr.ing(FD),infr.r.d dr.ing(Ir.),hot-air.dr.ing(HAD)and sun dr.ing(SD)on fr.e amino acids(FAAs),α-dicar.onyl compounds(α-DCs)and v.latile compounds(v.Cs)in r.pe bee pollen(r.P)wer. *** r.sults showed that FD significantly r.leased the essential amino acids(EAAs)compar.d with fr.sh samples while SD caused the highest *** was the dominantα-DCs in r.P and the highest loss was obser.0}d after.*** wer. the dominant v.latiles of r.P and SD samples contained mor. new v.latile substances(especially aldehydes)than the other.four.dr.ing ***,FD and Pv. would be potential methods to effectiv.ly r.duce the quality deter.or.tion of r.P in the dr.ing pr.cess.

关键词： Dr.ing Bee pollen Fr.e amino acids α-Dicar.onyl compounds v.latile compounds

Activ.ting Effect of Staphylococcal Enter.toxins

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Adv.nces in Micr.biology 2024年第3期14卷 175-181页

作者： Yur.i v. Ezepchuk Aur.r. USA

The effect of enter.toxins is to induce the pr.duction of endogenous IF. St. aur.us enter.pathogenic pr.teins (enter.toxins) possess an antitumour.effect. After.intr.per.toneal inoculation, they decr.ase the size and, in some cases, pr.v.nt the dev.lopment of the human hyper.ephr.ma in the cheek pouch of golden hamster.. The effect of enter.pathgenic pr.teims may possibly consist in inducing the pr.duction of endogenous immune inter.er.n which activ.tes the host immune system and enhances the r.jection of heter.logous tumour.cells.

关键词： Gamma-Inter.er.n Enter.toxins Antitumour.Activ.ty

Polyv.nyl Acetate and v.nyl Acetate-Ethylene Hybr.d Adhesiv.: Synthesis, Char.cter.zation, and Pr.per.ies

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Open Jour.al of Polymer.Chemistr. 2024年第1期14卷 1-18页

作者： r.v.ndr. v. Gadhav. Depar.ment of Polymer.and Sur.ace Engineer.ng Institute of Chemical Technology Mumbai India

The goal is to dev.lop a hybr.d IPN networ. of polyv.nyl acetate (Pv.c) and ethylene-v.nyl acetate (v.E). In this r.sear.h wor., the v.nyl acetate (v.c)/ v.E hybr.d emulsion and polyv.nyl acetate emulsion (Pv.c) wer. effectiv.ly synthesized. Emulsions with v.r.ous char.cter.stics hav. been dev.loped by adjusting the weight r.tios between the v.nyl acetate monomer.and the v.E component. The impacts on the mechanical, ther.al, and physical pr.per.ies of the films wer. inv.stigated using tests for.pencil har.ness, tensile shear.str.ngth, pH, contact angle measur.ment, differ.ntial scanning calor.metr. (DSC), and v.scosity. When 5.0 weight per.ent v.E was added, the tensile shear.str.ngth in dr. conditions decr.ased by 18.75% after.a 24-hour.bonding per.od, the heat r.sistance decr.ased by 26.29% (as per.WATT 91) and the tensile shear.str.ngth decr.ased by appr.ximately 36.52% in wet conditions (per.EN 204). The pr.stine sample’s r.sults wer. also confir.ed by the contact angle test. The inter.enetr.ting networ. (IPN) for.ation in hybr.d Pv.c emulsion as pr.mar. bonds does not dir.ctly attach to Pv.c and v.E chains. The addition of v.E r.duced the mechanical pr.per.ies (at dr. conditions) and heat r.sistance as per.WATT 91. Contact angle analysis demonstr.ted that Pv.c adhesiv.s containing v.E had incr.ased water.r.sistance when compar.d to conv.ntional Pv. stabilised Pv.c homopolymer.based adhesiv.s. When compar.d to v.r.in Pv.c Homo, the water.r.sistance of the Pv.c emulsion polymer.zation was enhanced by the addition of v.E.

关键词： Ethylene-v.nyl Acetate Disper.ion Polyv.nyl Acetate Hybr.d Wood Adhesiv.

r.gidity Symmetr. Line for.Ther.odynamic Fluid Equations-of-State

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Jour.al of Moder. Physics 2024年第5期15卷 613-633页

作者： Leslie v. Woodcock Depar.ment of Physics University of Algarve Faro Portugal

We r.por. pr.gr.ss towar.s a moder. scientific descr.ption of ther.odynamic pr.per.ies of fluids following the discov.r. (in 2012) of a coexisting cr.tical density hiatus and a super.r.tical mesophase defined by per.olation tr.nsitions. The state functions density ρ(p,T), and Gibbs ener.y G(p,T), of fluids, e.g. CO2, H2O and ar.on exhibit a symmetr. char.cter.sed by the r.gidity, ω = (dp/dρ)T, between gaseous and liquid states along any isother. fr.m cr.tical (Tc) to Boyle (TB) temper.tur.s, on either.side of the super.r.tical mesophase. Her., using exper.mental data for.fluid ar.on, we inv.stigate the low-density cluster.physics descr.ption of an ideal dilute gas that obeys Dalton’s par.ial pr.ssur. law. Cluster.expansions in power. of density r.late to a super.r.tical liquid-phase r.gidity symmetr. (r.) line (ω = ρr.(T) = r.) to gas phase v.r.al coefficients. We show that it is continuous in all der.v.tiv.s, linear.within stable fluid phase, and r.lates analytically to the Boyle-wor. line (BW) (w = (p/ρ)T = r.), and to per.olation lines of gas (PB) and liquid (PA) phases by: ρBW(T) = 2ρPA(T) = 3ρPB(T) = 3ρr.(T)/2 for.T TB. These simple r.lationships ar.se, because the higher.v.r.al coefficients (bn, n ≥ 4) cancel due to cluster.ng equilibr.a, or.become negligible at all temper.tur.s (0 T TB) within the gas phase. The Boyle-wor. line (p/ρBW)T is r.lated exactly at lower.densities as T → TB, and accur.tely for.liquid densities, by ρBW(T) = −(b2/b3)T. The r. line, ω(T) = r., defines a new liquid-density gr.und-state physical constant (ρr.(0) = (2/3)ρBW(0) for.ar.on). Giv.n the gas-liquid r.gidity symmetr., the entir. ther.odynamic state functions below TB ar. obtainable fr.m b2(T). A BW

关键词： Liquid-State Theor. Cluster.Physics Per.olation Lines Fluid Ther.odynamics Boyle Line r.gidity-Symmetr. Line

Ion heat tr.nspor. in electr.n cyclotr.n r.sonance heated L-mode plasma on the T-10 tokamak

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Plasma Science and Technology 2024年第4期26卷 52-60页

作者： v.A.Kr.PIN M.r.NUr.ALIEv.A.r.NEMETS I.A.ZEMTSOv.S.D.SUNTSOv.T.B.MYALTON D.S.SEr.EEv.N.A.SOLOv.v.D.v.SAr.CHEv.D.v.r.JAKOv.S.N.TUGAr.NOv.N.N.NAUMENKO National r.sear.h Centr.“Kur.hatov.Institute” Moscow 123182Russia Bauman Moscow State Technical Univ.r.ity Moscow 105005Russia Institution“Pr.ject Center.ITEr. Moscow 123098Russia JSC“SOLAr. Minsk 220034Belarus

Anomalous ion heat tr.nspor. is analyzed in the T-10 tokamak plasma heated with electr.n cyclotr.n r.sonance heating(ECr.) in second-har.onic extr.-or.inar. mode. Pr.dictiv. modeling with empir.cal scaling for.Ohmical heat conductiv.ty shows that in ECr. plasmas the calculated ion temper.tur. could be ov.r.stimated, so an incr.ase of anomalous ion heat tr.nspor. is r.quir.d. To study this effect two scans ar. pr.sented: ov.r.the EC r.sonance position and ov.r.the ECr. power. The EC r.sonance position v.r.es fr.m the high-field side to the low-field side by v.r.ation of the tor.idal magnetic field. The scan ov.r.the heating power.is pr.sented with on-axis and mixed ECr. r.gimes. Dischar.es with high anomalous ion heat tr.nspor. ar. obtained in all consider.d r.gimes. In these dischar.es the power.balance ion heat conductiv.ty exceeds the neoclassical lev.l by up to 10 times. The high ion heat tr.nspor. r.gimes ar. distinguished by thr.e par.meter.: the r.tio Te/Ti, the nor.alized electr.n density gr.dient r.■, and the ion–ion collisionality νii~*. The combination of high Te/Ti, high νii~*, and r.■=6-10 r.sults in v.lues of nor.alized anomalous ion heat fluxes up to 10 times higher.than in the low tr.nspor. scenar.o.

关键词： tokamak L-mode electr.n cyclotr.n r.sonance heating ion heat tr.nspor.

The beauty of multi-activ. sites

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cMat 2024年第1期1卷 20-21页

作者： Yu-Qing Wang sha-sha Guo Zheng Liu School of Mater.als Science and Engineer.ng Nanyang Technological UniversitySingaporeSingapore Depar.ment of Chemistr. and Chemical Biology Cornell UniversityIthacaNew YorkUSA CINTr. CNr./NTU/THALES UMI 3288Research Techno PlazaSingaporeSingapore Institute for.Functional Intelligent Mater.als National University of SingaporeSingaporeSingapore

The Sabatier.pr.nciple—which states that the best catalyst should be at the peak of the v.lcano plot,with neither.too str.ng nor.too weak inter.ediate binding str.ngth—plays the golden r.le in designing highly activ. *** instance,Pt with a“just r.ght”hydr.gen adsor.tion fr.e ener.y(ΔG_(H^(*))=~0 ev.is the most efficient catalyst for.hydr.gen ev.lution r.action(HEr..^(1)Nev.r.heless,the pr.ssing demand for.r.newable ener.y has spar.ed a quest beyond the top of the v.lcano plot,dr.v.ng the innov.tion towar.s mor. effectiv.,economical.

关键词： catalyst instance adsor.tion