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Physical.m.chanism.for origin of stream.ise vortices in m.de A of a square-section cylinder

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Acta m.chanica Sinica 2019年第2期35卷 411-418页

作者： l. m. lin S. Y. Shi Y. X. Wu Key l.boratory for m.chanics in Fl.id Sol.d Coupling System. Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China School.of Engineering Sciences University of Chinese Academy of Sciences Beijing 100049 China

In the present paper, physical.m.chanism.responsibl. for origin of stream.ise vortices in m.de A appeared in the threedim.nsional.(3-D) wake transition of a square-section cylinder is investigated. Direct num.rical.sim.l.tions at a Reynol.s num.er of 180 firstl. show that such stream.ise vorticity is not originated from.l.teral.surfaces. Then through the anal.sis of l.cal.fl.w fiel. in the im.ediate neighborhood of rear surface, based on the theory of vortex-induced vortex, a new physical.m.chanism.is identified. At first, the vertical.vorticity on rear surface is generated by the intrinsic three-dim.nsional.instabil.ty with the sam. instabil.ty wavel.ngth of m.de A. Then the stream.ise vorticity at a specific sign is induced by such vertical.vorticity, convected and concentrated in the shear l.yers. Final.y, stream.ise vortices are form.d and shed with al.ernativel. shedding spanwise vortices in the near wake. m.reover, the effect of induced spanwise vorticity on original.two-dim.nsional.(2-D) spanwise vorticity is al.o presented in detail.

关键词： m.de A Stream.ise vortices Wake Square cylinder Vortex-induced vortex

Boosting bidirectional.sul.ur conversion enabl.d by introducing boron-doped atom. and phosphorus vacancies in Ni2P for l.thium.sul.ur batteries

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Journal.of Energy Chem.stry 2025年第1期100卷 760-769页

作者： lin Peng Yu Bai Hang l. m.ixiu Qu Zhenhua Wang Kening Sun Advanced Research Institute of m.l.idisciplinary Science Beijing Institute of Technology Beijing Key l.boratory of Chem.cal.Power Source and Green Catal.sis School of Chemistry and Chemical Engineering Beijing Institute of Technology

l.thium.sul.ur （l.-S） batteries have gained great attention due to the high theoretical.energy density and l.w cost,yet their further com.ercial.zation has been obstructed by the notorious shuttl. effect and sl.ggish redox ***,we suppl. a strategy to optim.ze the el.ctron structure of Ni2P by concurrentl. introducing B-doped atom. and P vacancies in Ni2P （Vp-B-Ni2P）,thereby enhancing the bidirectional.sul.ur *** study indicates that the sim.l.aneous introduction of B-doped atom. and P vacancies in Ni2P causes the redistribution of el.ctron around Ni atom.,bringing about the upward shift of d-band center of Ni atom. and effective d-p orbital.hybridization between Ni atom. and sul.ur species,thus strengthening the chem.cal.anchoring for l.thium.pol.sul.ides （l.PSs） as wel. as expediting the bidirectional.conversion kinetics of sul.ur ***,theoretical.cal.ul.tions reveal.that the incorporation of B-doped atom. and P vacancies in Ni2P sel.ctivel. prom.tes l.2S dissol.tion and nucl.ation ***,the l.-S batteries with Vp-B-Ni2P-separators present outstanding rate abil.ty of 777 m.A h g-1at 5 C and high areal.capacity of 8.03 m. h cm.2under E/S of 5μl.m.-1and sul.ur l.ading of 7.20 m. *** work el.cidates that introducing heteroatom.and vacancy in m.tal.phosphide col.aborativel. regul.tes the el.ctron structure to accel.rate bidirectional.sul.ur conversion.

关键词： l.thium.sul.ur batteries

El.ctrocatal.tic cl.avage of a l.gnin β-O-4 m.del.com.ound and coupling with nitrogen-containing arom.tics using Prussian bl.e anal.gue-derived nickel.cobal. spinel

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Journal.of Energy Chem.stry 2025年第1期100卷 628-636页

作者： Yi Qi Xueying Chen Bowen l.u Xul.ang lin Xueqing Qiu Yanlin Qin Guangdong Provincial.Key l.boratory of Pl.nt Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial.l.boratory of Chem.stry and Fine Chem.cal.Engineering Jieyang Center Guangdong Basic Research Center of Excel.ence for Ecol.gical.Security and Green Devel.pm.nt Guangdong University of Technology

El.ctrochem.cal.conversion of l.gnin for the production of high-val.e heterocycl.c arom.tic com.ounds has great *** dem.nstrate the targeted synthesis and cation m.dul.tion of NiCo2O4spinel.nanoboxes,synthesized via cation exchange and cal.ination *** catal.sts exhibit excel.ent efficacy in the el.ctrocatal.tic conversion of l.gnin m.del.com.ounds,specifical.y 2-phenoxy-1-phenyl.thanol.into nitrogen-containing arom.tics,achieving high conversion rates and *** catal.sts were synthesized via a cation exchange and cal.ination oxidation process,using Prussian bl.e nanocubes as *** porous architecture and pol.m.tal.ic com.osition of the NiCo2O4spinel.dem.nstrated superior perform.nce in el.ctrocatal.tic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenyl.thanol.with sel.ctivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations incl.de the devel.pm.nt of a sustainabl. one-pot synthesis m.thod for quinoline derivatives,the el.cidation of a m.l.istage reaction pathway invol.ing CAO bond cl.avage,hydroxyal.ol.condensation,and CAN bond form.tion,and a deeper m.chanistic understanding derived from.DFT *** work establ.shes a new strategy for l.gnin val.rization,offering a sustainabl. route to produce high-val.e nitrogen-containing arom.tics from.renewabl. biom.ss under m.l. conditions,without the need for additional.reagents.

关键词： Spinel Biom.ss val.rization El.ctrocatal.sis l.gnin oxidation Coupling

Em.rging rol. of A-kinase anchoring protein 5 signaling in reward circuit function

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Neural.Regeneration Research 2025年第10期20卷 2913-2914页

作者： Wil.iam.J.Fl.rl.ge m.rk l.Del.’Acqua Brian m.Cox Fereshteh S.Nugent Uniform.d Services University of the Heal.h Sciences Department of Pharmacology and Molecular TherapeuticsBethesdaMDUSA Departm.nt of Pharm.col.gy University of Colorado School of MedicineAnschutz Medical CampusAuroraCOUSA

There is a strong evidence supporting the hypothesis of synaptic dysfunction as a m.jor contributor to neural.circuit and network disruption underl.ing em.tional.and m.od dysregul.tion in psychiatric disorders(Sim.ons et al.,2024).Diverse sets of distinct m.l.cul.r signaling pathways converge on the synapse to regul.te synaptogenesis,synaptic function,and synaptic pl.sticity in brain regions and circuits through com.l.x interactions organized by num.rous m.l.ival.nt protein scaffol.s,incl.ding the fam.l. of proteins known as A-kinase anchoring proteins(AKAPs).

关键词： function supporting

Antigravitational.Instabil.ty of Cosm.c Substrate in the Newtonian Cosm.l.gy

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Chinese Physics l.tters 2006年第8期23卷 2344-2347页

作者： CHECHIN l. m. Fessenkov Institute for Astrophysics Ministry of Education and Science Republic of Kazakhstan PO Box 05 Almaty 480005 Kazakhstan

A new version of the form.ng Universe l.rge-scal. structures is proposed, based on the refuse of anal.ses of onl. the gravitational.instabil.ty of the cosm.l.gical.substrate, Vacuum. i.e. the dom.nant nonbaryonic m.tter in the Universe, creates the antigravitational.instabil.ty of the baryonic cosm.c substrate itsel. and causes the form.tion of gal.xies.

关键词： FOSSIl.GAl.XY GROUP DARK ENERGY UNIVERSE SUPERNOVAE REDSHIFT

Observation of acoustic hybrid topol.gical.phases induced by the p-d orbital.interactions

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Science China(Physics,m.chanics & Astronom.) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang Feng Gao Yu-Gui Peng Peng Wu Zong-lin l. Xue-Feng Zhu School.of Physics and Innovation Institute Huazhong University of Science and Technology

In spinl.ss system.,growing attention has recentl. been attracted to synthetic gauge fiel.s,which redefine the fundam.ntal.crystal.sym.etries by util.zing the projective al.ebraic ***,synthetic gauge fiel.s have been com.onl. investigated in singl. orbital.system.,and expl.rations on hybrid orbital. rem.in el.sive in ***,we report the experim.ntal.observation of hybrid topol.gical.phases induced by hybrid synthetic gauge fl.x,which is form.d by the interaction between p and d orbital. em.edded in acoustic *** breaking the transl.tion sym.etries of l.and/or l.,we unam.iguousl. dem.nstrate the first-order m.bius edge states and higher-order corner *** work establ.shes a pl.tform.for seeking exotic topol.gical.phases induced by hybrid-orbital. interactions and initial.zing the fram.work of hybrid-orbital.rel.ted topol.gical.*** appl.cations can be anticipated in scenarios such as high-qual.ty sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topol.gical.phase.

关键词： topol.gical.insul.tor synthetic gauge fiel. projective sym.etry corner states

High Fe‑l.ading Singl.‑Atom.Catal.st Boosts ROS Production by Density Effect for Efficient Antibacterial.Therapy

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Nano-m.cro l.tters 2025年第2期17卷 187-203页

作者： Si Chen Fang Huang l.jie m.o Zhim.n Zhang Han lin Qixin Yan Xiangyu l. Jianlin Shi Departm.nt of Cardiol.gy Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghai 200092People’s Republic of China Shanghai Institute of Ceram.cs Chinese Academy of SciencesShanghai 200050People’s Republic of China Shanghai Frontiers Science Center of Nanocatal.tic m.dicine School of MedicineTongji UniversityShanghai 200092People’s Republic of China

The current singl.-atom.catal.sts(SACs)for m.dicine stil. suffer from.the l.m.ted active site ***,we devel.p a synthetic m.thod capabl. of increasing both the m.tal.l.ading and m.ss-specific activity of SACs by exchanging zinc with *** constructed iron SACs(h^(3)-FNC)with a high m.tal.l.ading of 6.27 wt%and an optim.zed adjacent Fe distance of~4 A exhibit excel.ent oxidase-l.ke catal.tic perform.nce without significant activity decay after being stored for six m.nths and prom.sing antibacterial.***,a“density effect”has been found at a high-enough m.tal.doping am.unt,at which individual.active sites becom. cl.se enough to interact with each other and al.er the el.ctronic structure,resul.ing in significantl. boosted intrinsic activity of singl.-atom.c iron sites in h^(3)-FNCs by 2.3 tim.s com.ared to l.w-and m.dium.l.ading ***,the overal. catal.tic activity of h^(3)-FNC is highl. im.roved,with m.ss activity and m.tal.m.ss-specific activity that are,respectivel.,66 and 315 tim.s higher than those of com.ercial.Pt/*** addition,h^(3)-FNCs dem.nstrate efficientl. enhanced capabil.ty in catal.zing oxygen reduction into superoxide anion(O_(2)·^(−))and gl.tathione(GSH)*** in vitro and in vivo assays dem.nstrate the superior antibacterial.efficacy of h^(3)-FNCs in prom.ting wound *** work presents an intriguing activity-enhancem.nt effect in catal.sts and exhibits im.ressive therapeutic efficacy in com.ating bacterial.infections.

关键词： Nanocatal.tic m.dicine Singl.-atom.catal.sts Reactive oxygen species(ROS) High m.tal.l.ading Oxidase catal.sis

Frictional.contact probl.m.for el.stic-viscopl.stic m.terial. with therm.l.effect

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Appl.ed m.them.tics and m.chanics(Engl.sh Edition) 2013年第6期34卷 761-776页

作者： m. SEl.ANI l. SEl.ANI Departm.nt of m.them.tics University of Setif

A dynam.c contact probl.m.for el.stic-viscopl.stic m.terial. with therm.l.effects is investigated. The contact is bil.teral. and the friction is m.del.d with Tresca＇s friction l.w with heat exchange. A variational.form.l.tion of the m.del.is derived, and the existence of a unique weak sol.tion is proved. The proofs are based on the cl.ssical.resul. of nonlinear first order evol.tion inequal.ties, the equations with m.notone operators, and the fixed point argum.nts. Final.y, the continuous dependence of the sol.tion on the friction yiel. l.m.t is studied.

关键词： therm.-el.sto-viscopl.stic m.terial dynam.c process bil.teral.contact,Tresca's friction evol.tion inequal.ty evol.tion equation weak sol.tion fixed point

Is the possibl. fine-structure constant drift al.o a test of a tim.-dependent Pl.nck constant?

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Science China(Physics,m.chanics & Astronom.) 2011年第12期54卷 2191-2195页

作者： ZTAS A. m. Sm.TH m. l. Engineering Physics Hacettepe University Jannek Fuel.Inc. Phoenix

The recent publ.cation of spatial.and distance variation of the fine-structure constant, α, derived from.astronom.cal.data of quasar em.ssions (QE) is exciting. The decreasing val.e of α over tim., derived from.data obtained from.the Very l.rge Tel.scope (Vl.) in Chil., encourages the search for other possibl. running constants. We surm.se that em.ssions from.distant supernovae, type Ia (SNe Ia), which are m.re bl.e than predictions are best expl.ined by a decreasing Pl.nck constant with increasing l.okback tim.. We present som. resul.s from.our theoretical.work and com.arison to the astronom.cal.observations and suggest that both α and h m.ght be running constants. m.re data are required to answer several.questions about the origin of the "drifting" α and the possibl. tim. dependence of h. Astronom.cal.tool. such as SNe and QE m.y be the best m.ans to secure the exacting data needed to confirm.or deny these hypotheses.

关键词： al.ha quasars distance m.asurem.nt supernovae Cm.