简介:Stressrelaxationandattenuationoffluid-saturatedsandstoneatlowfrequencyDao-YingXI(席道瑛),Ai-WenLIU(刘爱文)andWeiLIU(刘卫)(Universityo...
简介:Thedensityofasphaltwasmeasuredwiththepycnometeranddensitometer.Creeppropertiesoftheasphaltwereinvestigatedwiththebendingbeamrheometerattemperaturesrangingfrom0℃to-36℃.Theasphaltdensitydatausedtocorrelatewiththecreeppropertieswerecalculatedfromtheregressionequationofdensityandtemperature.TheasphaltsampleusedtodeterminethecreeppropertywasagedbythestandardRTFOTtestandthePAVtest.Thetestresultsshowedthattheasphaltdensityhadalinearrelationshipwithtemperaturechanges.Thelogarithmofthecreepstiffnessandtheslopeofthelogarithmofthestiffnessat60secondsalldemonstratedalinearrelationshipwiththedensity,andtheregressioncoefficientofthesedatawasaround0.99.Thecreepstiffnessandtheslopeofthecreepstiffnesscanbecalculatedfromtheasphaltdensityatthesametemperature.
简介:Inthispaper,weinvestigateexcitedcharacteristicoftheweaklyinteractingquasi-one-dimensional(1D)andquasi-two-dimensional(2D)Bose–Einsteincondensation(BEC)inharmonicpotentialtrap.Theenergyspectrumandtheanalyticalexpressionofthesoundvelocityareobtainedandanalyzed.Comparedwith3-DimensionalhomogeneousBose-condensedgasoccasion,thesoundvelocityof2DBose-Einsteincondensationinharmonicpotentialtrapissmaller.
简介:Researchsituationofeco-designisanalyzed,andthenthoughtsandmethodsofeco-designarediscused.Theeco-designincludespackagingmodularization,dematerialization,energy-savingandbio-simulation.
简介:Alightpurplishredsapphireisheattreatedinanairtightcrucible.Thesamplechangeslittleincolorafterreceivingheattreatmentat1100°C,butturnstolightblueandblueafterbeingtreatedat1200°Cand1300°C,respectively.Beforeheating,theUV-VISabsorptionspectraofthesamplearedominatedbythe551nmbroadabsorptionbandcontributedbythed-electrontransition~4A_2→~4T_2ofCr~(3+).Afterheating,theUV-VISabsorptionspectraaredominatedbythe563nmbroadabsorptionbandcontributedbytheintervalencechargetransferofFe~(2+)-Ti~(4+).ThexrayphotoelectronspectroscopytestrevealsthattheFe~(2+)andTi~(4+)ioncontentsincreasewithincreasingtemperature.ThesapphirechangingfromlightpurplishredtoblueintheheatingprocessisowingtothefactthattheFe~(2+)andTi~(4+)contentsgrowandtheintervalencechargetransferofFe~(2+)-Ti~(4+)selectivelyabsorbsUV-VISlight.
简介:Inthisresearch,theFactorAnalysismodelofmeasuringprovinciallowcarbondevelopmentinChinahasbeenconstructed.Basedondatafrom30provinces,anempiricalstudywasdevelopedtomeasurecomprehensivelowcarbondevelopmentusingtheFactorAnalysismodel(PrincipalComponentsmethodandNormalizedVarimaxRotation).Theresultsrevealthattheprovincialmarksoflowcarbondevelopmentaregenerallylowandonlynineprovinceshavehighmarks(morethan0.80).Theresultsalsoshowsignificantregionaldisparity.TheprovincialmarksoftheeasternregionarehigherthanboththemiddleandwesternprovincesofmainlandChina.Alloftheprovinceswithhighmarks(morethan0.90)arelocatedintheeasternregion,andthosewiththelowestmarks(0.60)arelocatedinthemiddleregion.Furthermore,regionaldisparityinlowcarbondevelopmentfollowsthesamepatternaseconomicdevelopmentinChina.Finally,somesuggestionsfordecision-makersarepresented.
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简介:有绗维素酶的帮助的chitosan(72.05%的DD)的降级在45的条件下面被执行,pH5.0并且1:15(chitosan/enzyme)的比率。结果证明绗维素酶能降级chitosan高效地。chitosan的粘性很快速被减少,减少释放的糖在降级期间与时间被增加。由使用膜,水解作用混合的分离被学习。蛋白质的拒绝能被到达是low-molecular-weightchitosans的99.74%.65.9%是不到2kDa。chitosan被发现比chitosan和发射度好的low-molecular-weight的溶解度能到达是在pH的全部范围的超过95%113。
简介:Thekillinglogarithmsindexinkillingavegetativeforminanexplosureofabout90sandasporeinanexplosureofabout120s,byusingalow-temperatureplasmaproducedbydielectricbarrierdischarge(DBD),reached5.Thespeedinkillingthestrainstested,byusingalow-temperatureplasma,wasthehighestwithE.Coli,thenS.AureusandB.Subtilisvarnigerspore.Theresultsofthescanningelectronmicroscopeshowedthatthelow-temperatureplasmadestroyedtheouterstructureofthebacteriaandthatthevegetativeformwasmoresusceptibletotheinactivationeffectofthelow-temperatureplasmathanwasthespore.Thisindicatedthattheeffectsofthehighvoltageandhighvelocityparticleflow,inplasma,penetratingthroughtheouterstructureofthebacteriamightplayadominantroleduringtheinactivationofthebacteria.