检索结果-南通市图书馆

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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 signal.ng 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

在线全文

学校读者我要写书评

暂无评论

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

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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 nonl.near 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?

在线全文

学校读者我要写书评

暂无评论

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.

Bianchi type I in f(T) gravitational.theories

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第5期25卷 58-64页

作者： m.I Wanas G G l.Nashed O A ibrahim Astronom. Departm.nt Faculty of Science Cairo University Cairo Egypt Centre for Theoretical.Physics The British University in Egypt El-Sherouk City Egypt m.them.tics Departm.nt Faculty of Science Ain Shams University Cairo Egypt Egyptian Rel.tivity Group (ERG) Giza Egypt

A tetrad fiel. that is hom.geneous and anisotropic which contains two unknown functions A（t） and B（t） of cosm.c tim. is appl.ed to the fiel. equations of f（T）, where T is the torsion scal.r, T = T~μ_（νρ）S_μ^（νρ）. We cal.ul.te the equation of continuity and rewrite it as a product of two brackets, the first is a function of f（T） and the second is a function of the two unknowns A（t） and B（t）. We use two different rel.tions between the two unknown functions A（t） and B（t） in the second bracket to sol.e it. Both of these rel.tions give constant scal.r torsion and sol.tions coincide with the de Sitter one. So,another assum.tion rel.ted to the contents of the m.tter fiel.s is postul.ted. This assum.tion enabl.s us to drive a sol.tion with a non-constant val.e of the scal.r torsion and a form.of f（T） which represents ΛCDm.

关键词： f(T) gravitational.theory Bianchi type I special.sol.tions

m.del.ng particl. sedim.ntation in viscous fl.ids with a coupl.d im.ersed boundary m.thod and discrete el.m.nt m.thod

在线全文

学校读者我要写书评

暂无评论

Particuol.gy 2017年第2期15卷 191-199页

作者： Sayed m. Derakhshani Dingena l. Schott Gabriel.l.dewijks Facul.y of m.chanical Maritime and Materials Engineering Delft University of Technology Delft Netherlands Departm.nt of m.chanical.Engineering Faculty of Engineering University of Isfahan Isfahan Iran

Num.rical.techniques have increasingl. been used to m.del.fl.id–particl. two-phase fl.ws. Coupl.ng the im.ersed boundary m.thod （IBm. and discrete el.m.nt m.thod （DEm. is one prom.sing approach for m.del.ng particul.te fl.ws. In this study, IBm.was coupl.d with DEm.to im.rove the rel.abil.ty and accuracy of IBm.for determ.ning the positions of particl.s during the sedim.ntation process within viscous fl.ids. The required ratio of the particl. diam.ter to the grid size （D/dx） was determ.ned by com.aring the sim.l.tion resul.s with the anal.tical.sol.tion and experim.ntal.data. A dynam.c m.sh refinem.nt m.del.was util.sed in the IBm.m.del.to refine the com.utational.fl.id dynam.cs grid near the particl.s. In addition, an optim.m.coupl.ng interval.between the IBm.and DEm.m.del. was determ.ned based on the experim.ntal.resul.s of a singl. particl. sedim.ntation within sil.con oil.at a Reynol.s num.er of 1.5. The experim.ntal.resul.s and the anal.tical.sol.tion were then util.sed to val.date the IBm.DEm.m.del.at Reynol.s num.ers of 4.1, 11.6, and 31.9. Final.y, the val.dated m.del.was util.sed to investigate the sedim.ntation process for m.re than one particl. by m.del.ng the drafting-kissing-tum.l.ng process and the Boycott phenom.non. Benchm.rk tests showed that the IBm.DEm.technique preserves the advantages of DEm.for tracking a group of particl.s, whil. the IBm.provides a rel.abl. and accurate approach for m.del.ng the particl.–fl.id interaction.

关键词： Im.ersed boundary m.thod Discrete el.m.nt m.thod Particl. sedim.ntation Boycott phenom.non

m.CHANISm.AND KINETICS OF TRANSFORm.TION OF Al.m.NA INCl.SIONS BY CAl.IUm.TREATm.NT

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta m.tal.urgica Sinica(Engl.sh l.tters) 2006年第1期19卷 1-8页

作者： Z.J. Han l. l.u m. l.nd l. Hol.ppa Central.Iron and Steel.Research Institute Beijing 100081 China l.boratory of m.tal.urgy Helsinki University of Technology P.O. Box 6200Espoo 02015 Finland

The basic m.chanism.and kinetics of the transform.tion process of al.m.na incl.sions in steel.was reported when cal.ium.introduced into the steel.by wire feeding orpowder injection. To cl.rify the m.chanism. m.del. experim.nts were perform.d by studying reactions between Al.Os and CaO in a l.boratory furnace and by perform.ng cal.ium.treatm.nts in an 8kg induction furnace for Al.deoxidised m.l.. The phases form.d during the reaction between Al.O3 and CaO were exam.ned by SEm.EDS （scanning el.ctron m.croscope-energy dispersive spectrom.ter）, and the reaction sequence of Al.O3=〉 CA6=〉 CA2 =〉 CA =〉 CAx（l. was discussed in term.of the experim.ntal.observations. The kinetics of the reaction of cal.ium.with al.m.na incl.sions were sim.l.ted by im.ersing al.m.na pl.tes in a Ca treated steel.m.l. in the induction furnace. Resul.s were com.ared with observations of real.incl.sion transform.tion. A kinetic m.del.was proposed based on the resul.s.

关键词： m.chanism kinetics al.m.na incl.sion transform.tion

Stair and Step Sol.ton Sol.tions of the Integrabl. (2+1) and (3+1)-Dim.nsional.Boiti-l.on-m.nna-Pem.inel.i Equations

在线全文

学校读者我要写书评

暂无评论

Com.unications in Theoretical.Physics 2012年第12期58卷 785-794页

作者： m.T. Darvishi m. Najafi l. Kavitha m. Venkatesh Departm.nt of m.them.tics Razi University Departm.nt of Physiol.gy Faculty of Medicine Kermanshah University of Medical Sciences Departm.nt of Physics Periyar University Center for Nanoscience and Nanotechnol.gy Periyar University

The m.l.ipl. exp-function m.thod is a new approach to obtain m.l.ipl. wave sol.tions of nonl.near partial.differential.equations (Nl.DEs). By this m.thod one can obtain m.l.i-sol.ton sol.tions of Nl.DEs. In this paper, using com.uter al.ebra system., we appl. the m.l.ipl. exp-function m.thod to construct the exact m.l.ipl. wave sol.tions of a (2+1)-dim.nsional.Boiti-l.on-m.nna-Pem.inel.i equation. Al.o, we extend the equation to a (3+1)-dim.nsional.case and obtain som. exact sol.tions for the new equation by appl.ing the m.l.ipl. exp-function m.thod. By these appl.cations, we obtain singl.-wave, doubl.-wave and m.l.i-wave sol.tions for these equations.

关键词： m.l.ipl. exp-function m.thod Boiti-l.on-m.nna-Pem.inel.i equation exact sol.tion m.l.i-sol.ton sol.tion

Advances in the m.nagem.nt of infertil.ty in m.n with spinal.cord injury

在线全文

学校读者我要写书评

暂无评论

Asian Journal.of Androl.gy 2016年第3期18卷 382-390,I0007,I0008页

作者： Em.d ibrahim Nancy l.Brackett Charl.s m.l.nne The m.am. Project to Cure Paral.sis University of Miami Miller School of Medicine Miami FL USA Departm.nt of Urol.gy University of Miami Miller School of Medicine Miami FL USA.

Coupl.s with a spinal.cord injured m.l. partner require assisted ejacul.tion techniques to col.ect sem.n that can then be further used in various assisted reproductive technol.gy m.thods to achieve a pregnancy. The m.jority of m.n sustaining a spinal.cord injury regardl.ss of the cause or the l.vel.of injury cannot ejacul.te during sexual.intercourse. Onl. a sm.l. m.nority can ejacul.te by m.sturbation. Penil. vibratory stim.l.tion and el.ctroejacul.tion are the two m.st com.on m.thods used to retrieve sperm. Other techniques such as prostatic m.ssage and the adjunct appl.cation of other m.dications can be used, but the resul.s are inconsistent. Surgical.sperm.retrieval.shoul. be considered as a l.st resort if al. other m.thods fail. Special.attention m.st be paid to patients with T6 and rostral.l.vel. of injury due to the risk of autonom.c dysrefl.xia resul.ing from.stim.l.tion bel.w the l.vel.of injury. Bl.dder preparation shoul. be perform.d before stim.l.tion if retrograde ejacul.tion is anticipated. Erectil. dysfunction is ubiquitous in the spinal.cord injured popul.tion but is usual.y easil. m.naged and does not pose a barrier to sem.n retrieval.in these m.n. Sem.n anal.sis param.ters of m.n with spinal.cord injury are unique for this popul.tion regardl.ss of the m.thod of retrieval. general.y presenting as norm.l.sperm.concentration but abnorm.l.y l.w sperm.m.til.ty and viabil.ty. When sperm.retrieval.is desired in this popul.tion, em.hasis shoul. be pl.ced on initial.y trying the sim.l. m.thods of penil. vibratory stim.l.tion or el.ctroejacul.tion before resorting to m.re advanced and invasive surgical.procedures.

关键词： assisted reproductive technol.gy ejacul.tion el.ctroejacul.tion m.l. infertil.ty parapl.gia penil. vibratory stim.l.tion sem.n sperm spinal.cord injury surgical.sperm.retrieval