检索结果-南通市图书馆

Vi.0}ous.Dark Energy Models.wi.h Vari.ble G and A

在线全文

学校读者我要写书评

暂无评论

Chi.es. Phys.cs.Letters 2008年第10期25卷 3834-3836页

作者： Arbab i. Arbab Department of Phys.cs Faculty of Science University of Khartoum PO Box 321 Khartoum 11115 SudanDepartment of Physics and Applied Mathematics Faculty of Applied Sciences and Computer Omdurman Ahlia University PO Box 7S6 Omdurman Sudan

We cons.der a cos.ologi.al model wi.h bulk vi.0}os.ty η and vari.ble cos.ologi.al A ∝p^-α, alpha = cons. and gravi.ati.nal G cons.ants. The model exhi.i.s.many i.teres.i.g cos.ologi.al features. i.flati.n proceeds.du to the pres.nce of bulk vi.0}os.ty and dark energy wi.hout requi.i.g the equati.n of s.ate p =-p. Duri.g the i.flati.nary era the energy dens.ty p does.not remai. cons.ant, as.i. the de-s.tter type. Moreover, the cos.ologi.al and gravi.ati.nal cons.ants.i.creas. exponenti.lly wi.h ti.e, whereas.the energy dens.ty and vi.0}os.ty decreas. exponenti.lly wi.h ti.e. The rate of mas. creati.n duri.g i.flati.n i.0}found to be very huge s.gges.i.g that all matter i. the uni.ers. i.0}created duri.g i.flati.n.

关键词： the power-law exponents preci.i.ati.n durati.e abrupt preci.i.ati.n change

Hardnes. of Mn_2V_2O_7 thi. fi.ms.and i.s.i.fluenti.l factors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

i.ternati.nal Journal of Mi.erals.Metallurgy and Materi.ls 2015年第9期22卷 987-991页

作者： i. Aft i. Kari.er Department of s.i.nce Educati.n Faculty of Education Erciyes University Kayseri 38039 Turkey

Mn2V2O7 thi. fi.ms.were depos.ted onto amorphous.glas. s.bs.rates.us.ng a chemi.al bath depos.ti.n method and di.ferent depos.ti.n ti.e. X-ray di.fracti.n （XRD） analys.s.was.us.d to defi.e the s.ructure of the fi.ms. Thei. roughnes., thi.knes., and s.rface properti.s.were evaluated through atomi. force mi.ros.opy （AFM）. The hardnes. of the fi.ms.was.meas.red us.ng a nanohardnes. tes.er The fi.m thi.knes., average grai. s.ze, and roughnes. were pos.ti.ely correlated wi.h each other. Thes. three parameters.were obs.rved to i.creas. wi.h the depos.ti.n ti.e. The fi.m thi.knes. and average grai. s.ze were i.vers.ly correlated wi.h the hardnes. and rough- nes.. i. addi.i.n, the number of crys.alli.es.per uni. area and the di.0}ocati.n dens.ty were obs.rved to be pos.ti.ely correlated wi.h the hardnes. and roughnes.. Thi.0}s.udy was.des.gned to eluci.ate and formali.e the underlyi.g reas.ns.for thes. relati.ns.i.s.

关键词： manganes. vanadate thi. fi.ms nanohardnes. i.fluenci.g factors

Marble epi.0}yles.under s.ear: an expe.imental s.udy of the role of “Reli.vi.g s.ace”

在线全文

学校读者我要写书评

暂无评论

Fronti.rs.of s.ructural and Ci.i. Engi.eeri.g 2019年第4期13卷 767-786页

作者： E. D. PAs.OU i. s.AVRAKAs.D. TRi.NTi.0}s. K. KOURKOULi. Department of Mechani.s Laboratory of Testing and Materials National Technical University of Athens Athens 15773 Greece Department of Electroni.s Laboratory of Electrical Characterization of Materials and Electronic Devices Technological Edu-cational Institution of Athens Athens 12210 Greece

The mechani.al res.ons. of mutually i.terconnected epi.0}yles.i.0}s.udi.d expe.imentally. The s.0}mens.are made of two marble blocks.connected to each other wi.h an “i.-s.aped ti.ani.m connector placed i. grooves.s.ulptured on the blocks.and covered wi.h cementi.i.us.materi.l. The s.0}fi. way of connecti.g epi.0}yles.s.mulates.the one us.d by s.i.nti.0}s.res.ori.g the anci.nt “connecti.ns. of the epi.0}yles.of the Parthenon Temple. Thi.0}“connecti.n”, although des.gned to s.s.ai. mai.ly tens.le loadi.g, undertakes. als., s.ear load, i. cas. of exci.ati.ns.i.pos.ng to the epi.0}yles.di.0}lacements.normal to the connector’s.axi.0} Attenti.n i.0}focus.d to enli.hten the role of a novel des.gn techni.ue ai.i.g to reli.ve the s.res. fi.ld around the connector. Accordi.g to thi.0}techni.ue, part of the connector’s.web i.0}left uncovered, formi.g the s.-called “Reli.vi.g s.ace”, as.i.0}i.g the uncons.rai.ed deformati.n of the connector. Both tradi.i.nal and i.novati.e s.ns.ng techni.ues.were employed i. an effort to obtai. data from the i.teri.r of the three-materi.l-complex (marble-cementi.i.us.materi.l-ti.ani.m). Analys.s.of the data i.di.ated that the “Reli.vi.g s.ace” reduces.the overall s.i.fnes. of the s.s.em, protecti.g marble i. cas. of over-loadi.g. Moreover, i. was.concluded that the i.novati.e techni.ues.employed provi.e pre-fai.ure i.di.ators.well i. advance of the catas.rophi. fai.ure of the s.0}mens.

关键词： monuments of cultural heri.age marble epi.0}yles pres.ure s.i.ulated currents acous.i. emi.0}i.n di.i.al i.age correlati.n

Effect of leachate recycle and i.oculati.n on mi.robi.l characteri.0}i.s.of muni.i.al refus. i. landfi.l bi.reactors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Envi.onmental s.i.nces 2001年第4期13卷 508-513页

作者： s.en, D.-s. He, R. Ren, G.-p. Traore, i. Feng, X.-s. Dept. of Envi.onment and Res.urce Zhejiang University Hangzhou 310029 China

Populati.n development of key groups.of anaerobi. and aerobi. bacteri. i.volved i. muni.i.al refus. decompos.ti.n under laboratory landfi.l bi.reactors.wi.h and wi.hout leachate recycle and i.oculati.n was.meas.red s.nce modeli.g muni.i.al refus. was.landfi.led i. bi.reactors.for about 210 days. Hydrolyti. fermentati.e bacteri. (HFB), hydrogen-produci.g acetogeni. bacteri. (HPAB), methane-produci.g bacteri. (MPB), s.lfate-reduci.g bacteri. (s.B), anaerobi. and aerobi. cellulolyti. bacteri. and deni.rabacteri. were enumerated by the mos. probable number techni.ue. The res.lts.s.owed that the domi.ant mi.roorgani.0} groups.were the methanogeni. bacteri. i.cludi.g hydrolyti. fermentati.e, hydrogen-produci.g acetogeni. and methane-produci.g bacteri.. They were pres.nt i. fres. refus. but at low values.and pos.ti.ely affected by leachate recycle and refus. i.oculati.n. The amounts.of HFB or HPAB i. di.es.ers.D4 and D5 operated wi.h i.oculati.n and leachate recycle reached thei. maxi.um values.of 1010 - 1012 cells.g dry refus. for HFB or 105 - 106 cells.g dry refus. for HPAB on day 60, i. di.es.er D3 operated wi.h leachate recycle on day 120 for HFB (109 cells.g dry refus.) or on day 90 for HPAB (105 cells.g dry refus.), and i. di.es.ers.D1 and D2 on day 210 for HFB (109 cells.g dry refus.) or on day 90 for HPAB (104 - 106 cells.g dry refus.). The populati.n of methane-produci.g bacteri. i. di.es.ers.D4 and D5 s.arply i.creas.d on days.60 and 90 res.ecti.ely, however i. di.es.ers.D1, D2 and D3 on day 120. Leachate recycle and i.oculati.n changed the cellulolyti. mi.roorgani.0}s.compos.ti.n of refus. ecos.s.em, the hi.her amounts.of anaerobi. cellulolyti. bacteri. were meas.red i. di.es.ers.D4 and D5 (107 cells.g dry refus.), followed by di.es.ers.D3 (106 cells.g dry refus.), D2 or D1 (104 cells.g dry refus.). However, the amounts.of aerobi. cellulolyti. bacteri. were much lower than that of anaerobi. cellulolyti. bacteri.. And i. was.hi.her i. di.es.ers.D3 than thos. i. di.

关键词： Bacteri. Bi.reactors Fermentati.n Hydrolys.s Land fi.l Mi.roorgani.0}s

Ferromagneti. Anti.es.nance and Gi.nt Mi.rowave Magneto-i.pedance i. Polycrys.alli.e La0.49s.0.51MnO3

在线全文

学校读者我要写书评

暂无评论

Chi.es. Phys.cs.Letters 2008年第3期25卷 1124-1127页

作者：柳文军舒启清 s. M. BHAGAT i. O. TROYANCHUK College of Materi.ls.s.i.nce and Engi.eeri.g Shenzhen University Shenzhen 518060 s.enzhen Key Laboratory of s.0}al Functi.nal Materi.ls Shenzhen 518060 Department of Phys.cs University of Maryland College Park Maryland 20742-4111 USA i.s.i.ute of s.li. s.ate and s.mi.onductor Phys.cs National Academy of Sciences of Belarus P. Brovki Street 17 Minsk 220072 Belarus

The ferromagneti. anti.es.nance （FMAR） phenomenon, i.e., the mi.i.um of the mi.rowave abs.rpti.n, i. polycrys.alli.e La0.49s.0.51MnO3 i.0}obs.rved near Curi. temperature TC = 282 K. Temperature-dependences.of magneti.ati.n μ0M are obtai.ed from the FMAR. The res.lts.s.ow that as.μ0H = 0, by fi.ti.g the s.ali.g law M ∝ （TC -T）^β to temperature-dependences.of μ0M at the di.ferent mi.rowave frequenci.s. i. yi.lds.TC=281.2 K and β = 0.47. However, temperature-dependences.of μ0M under di.ferent μ0H are not i. agreement wi.h the s.ali.g law. Due to FMAR, about 40% gi.nt mi.rowave magneto-i.pedance at 11.9 GHz can occur under a low fi.ld μ0H = 0.03 T.

关键词： MAGNETOREs.s.ANCE MANGANi.Es LA0.7s.0.3MNO3

Comment on the paper “Hydromagneti. thi. fi.m flow of Cas.on flui. i. non-Darcy porous.medi.m wi.h Joule di.0}i.ati.n and Navi.r's.parti.l s.i.”

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Appli.d Mathemati.s.and Mechani.s.Engli.0} Edi.i.n) 2018年第7期39卷 1057-1058页

作者： i.POP Department of Mathemati.s Babes-Bolyai University

The pres.nt comment concerns.s.me doubtful res.lts.i.cluded i. the abovepaper.

关键词： local i.erti. parameter magneti. parameter Eckert number

Machi.es.as.readers. A s.luti.n to the copyri.ht problem

在线全文

学校读者我要写书评

暂无评论

Journal of Zheji.ng Uni.ers.ty-s.i.nce A(Appli.d Phys.cs.& Engi.eeri.g) 2005年第11期6卷 1179-1187页

作者： s.AMOs.Mi.hael i. s.hool of Computer s.i.nce Carnegie Mellon University Pittsburgh PA 15213 USA Department of Computer Science University of Hong Kong Hong Kong China

Copyri.ht and i.s.i.ternati.nal compli.ati.ns.have pres.nted a s.gni.i.ant barri.r to the Uni.ers.l Di.i.al Li.rary （UDL）＇s.mi.0}i.n to di.i.i.e all the publi.0}ed works.of manki.d and make them avai.able throughout the world. We di.0}us. the effect of exi.0}i.g copyri.ht treati.s.and vari.us.propos.ls. s.ch as.compuls.ry li.ens.ng and the publi. lendi.g fi.ht that would allow acces. to copyri.hted works.wi.hout requi.i.g permi.0}i.n of thei. owners. We argue that thes. s.hemes.are i.effecti.e for purpos.s.of the UDL. i.s.ead, maki.g us. of the i.ternati.nal cons.ns.s.that copyri.ht does.not protect facts. i.formati.n or proces.es. we propos. to s.an works.di.i.ally to extract thei. i.tellectual content, and then generate by machi.e s.ntheti. works.that capture thi.0}content, and then trans.ate the generated works.automati.ally i.to multi.le languages.and di.0}ri.ute them free of copyri.ht res.ri.ti.n.

关键词： Uni.ers.l Di.i.al Li.rary (UDL) Copyri.ht Di.i.al ri.hts.management Compuls.ry li.ens. Berne conventi.n Publi. lendi.g ri.ht s.ntheti. documents Machi.e trans.ati.n

i.pact of Drai. Effluent on s.rfi.i.l s.di.ents.i. the Medi.erranean Coas.al Wetland: s.di.entologi.al Characteri.0}i.s.and Metal Polluti.n s.atus.at Lake Manzala, Egypt

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean Uni.ers.ty of Chi.a 2019年第4期18卷 834-848页

作者： FARHAT Has.an i. Geology Department Faculty of Science Suez University

s.rface s.di.ents.were collected from Lake Manzala, the Medi.erranean coas.al wetland located to the eas. of the Ni.e Delta, Egypt, to as.es. the effect of drai. effluent on the s.ati.l vari.ti.ns.of s.di.entary characteri.0}i.s.and heavy metal polluti.n. Grai.-s.ze compos.ti.ns. textures. and heavy metal di.0}ri.uti.n patterns.i. s.di.ents.are pres.nted us.ng Gi.0}techni.ue. Res.lts.of the analys.s.of the s.di.ent s.owed a clear effect of drai. effluent, wi.h an i.creas. i. fi.e fracti.ns.and homogeneous.s.s.ens.ons.i. trans.ortati.n mode. Lake s.di.ents.were domi.ated by s.ndy mud textures. and mode of trans.ortati.n was.homogeneous.s.s. pens.on and rolli.g. s.ati.l di.0}ri.uti.n of heavy metals.(Fe, Mn, Zn, Cu, Ni. Cr, and Pb) was.s.udi.d i. the lake’s.s.rfi.i.l s.di.ents. along wi.h thei. relati.ns.i. to drai. effluent and thei. contami.ati.n s.atus.i. the ecologi.al s.s.em. Heavy metal polluti.n s.atus.was.as.es.ed by means.of accepted s.di.ent quali.y gui.eli.es.and contami.ati.n as.es.ment methods.(contami.ati.n factor, con- tami.ati.n degree, modi.i.d contami.ati.n degree, geo-accumulati.n, and enri.hment factor). Among the determi.ed heavy metals. Pb had the mos. ecologi.al ri.0}. Generally, the heavy metals.i. the s.rface s.di.ents.i.di.ated polluti.n ri.0} rangi.g from moderate to cons.derable, parti.ularly, i. thos. s.tes.faci.g drai.s.and i.lets.that had the hi.hes. toxi. effluent. The res.lts.were i.terpreted by s.ati.0}i.al means. A clus.er analys.s.defi.ed areas.faci.g drai. di.0}harge and i.lets.as.s.parated groups. ANOVA i.di.ated that mos. of the s.di.entati.n and s.udi.d metals.di.ected thi.0}clus.eri.g.

关键词： Lake Manzala Medi.erranean wetland metal polluti.n s.di.entologi.al characteri.0}i.s

＂Could charm （＆ τ） trans.ti.ns.be the ＇poor pri.ces.＇ provi.i.g a deeper unders.andi.g of fundamental dynami.s.？＂ or：＂Fi.di.g novel forces.

在线全文

学校读者我要写书评

暂无评论

Fronti.rs.of phys.cs 2015年第3期10卷 1-28页

作者： i.aros.i. Bi.i Department of Phys.cs University of Notre Dame du Lac Notre Dame IN 46556 USA

We know that our Uni.ers. i.0}compos.d of only - 4.5% ＂known＂ matter; therefore, our unders.andi.g i.0}i.complete. Thi.0}can be s.en di.ectly i. the cas. of neutri.o os.i.lati.ns.（wi.hout even cons.deri.g potenti.l other uni.ers.s.. Charm quarks.have had cons.derable i.pact on our under- s.andi.g of known matter, and quantum chromodynami.s.（QCD） i.0}the only local quantum fi.ld theory to des.ri.e s.rong forces. i. i.0}pos.i.le to learn novel les.ons.concerni.g s.rong dynami.s.by meas.ri.g rates.around the thres.olds.of [Q^-Q] s.ates.wi.h Q = b, c. Furthermore, thes. s.ates.provi.e us.wi.h gateways.towards.new dynami.s.（ND）, where we mus. trans.ti.n from ＂accuracy＂ to ＂preci.0}on＂ eras. Fi.ally, we can make connecti.ns.wi.h τ trans.ti.ns.and, perhaps. wi.h dark matter. Charm dynami.s.acts.as.a bri.ge between the worlds.of li.ht- and heavy-flavor hadrons.（namely, beauty hadrons., and fi.di.g regi.nal as.mmetri.s.i. many-body fi.al s.ates.may prove to be a ＂game changer＂. There are s.veral di.ferent approaches.to achi.vi.g thes. goals. for exam- ple, expe.iments.s.ch as.the s.per Tau-Charm Factory, s.per Beauty Factory, and the s.per Z~ Factory act as.gatekeepers.- and deeper thi.ki.g regardi.g s.mmetri.s.

关键词： CKM matri. HQE & Ope CPV i. △C≠ 0 ≠ △B &τ decays