简介:Invarioustemperatures,theeffectsofinorganicacidsonthefreephenollevelinliquefactionproductswereinvestigated.Inthispaper,thefreephenollevelwasusedasanindicatortoevaluateliquefactionefficiency.Resultsshowedthatsulfuricacidwasthebestamongthe4acids.Undertheconditionofreactiontemperature150oC,reactiontime1.5h,liquefactionratio(liquid/particleboard)4andcontentofsulfuricacid6%,thefreephenollevelintheliquefactionproductsofwasteparticleboardis36.95%,andthatoforiginalparticleboardis24.27%.
简介:Theprobailityofcranelivinginreedywetlandscanreach100%,atthesametime,theareaofreed,thewaterlevelandadjacentwaterareaaremainfactorswhichcontrolthecrane''''''''shabitatselection.Weallknowthatallthesefactorsarespatiallyheterogeneous.FortheXianghaiwetlandsafetyandtoprotecttheXianghaiwetlandhabitatofcrane,thispaperhasmainlyidentifiedasolutiontotheseproblems.ThewetlandinformationisextractedfromtheTMimages,whichreflectthewholewetlandlandscapeandareveryimportantforbothquantitativeanalysisofremotesensingobservationoftheearthsystemandpositioninganalysisinGISdatabasethatisautomaticallyextractedfromDEM.TheDEMforXianghaicharacteristicsoftopographyiscreated.OnthebasisoftheGRIDSUBMODULE,applyingtheGISspatialoverlayanalysis,therelationshipbetweenthewaterlevelandthereedareabelowthewaterlevelandtheratingdistributionmapsofreedareaabovewaterlevelisestablished,Whenthewaterlevelreachesthealtitudeof165n,thereedarea,981.2haismaximum,i.e.,thewaterlevelof165mistheoptimal.
简介:Radiointerference(RI),asanaftereffectofcoronadischarge,isanimportantresearchtopicinthefieldofelectromagneticcompatibility,whereexcitationfunctionisappliedbroadlytothepredictionofRIlevel.ThispaperpresentsthetheoryofexcitationfunctionmethodusedintheRIlevelprediction.Then,somepracticalproblemsrelatedtothismethodarediscussed.Thepropagationprocedureofcoronacurrentissolvedbythephase-modaltransformation,andtheimpedancematrixofmultitransmissionlinesiscalculatedbyadoublelogarithmicapproximatemodelofCarson'sGround-Returnimpedance.Atthesametime,inordertocalculatetheRIlevelwhentotallinecoronaisassumed,ananalyticalformulaisdeducedforintegraloperation.Basedontheabovesolutions,analgorithmispresentedandappliedtothepredictionofRIlevelofapracticaloverheadtransmissionline.Comparisonofpredictionandmeasurementresultsindicatesthatthealgorithmproposedinthispaperiseffectiveandfeasible.
简介:Basedontheassumptionofglobalsealevelrisingbetween30and100cminthefuture100yearsbyIPCC(1990)inadditiontotheeffectoflocalgroundsubsidence,thecoastlinewillretrogradefor50-70kmwhosealtitudeswillbe2.6-3.3maboveMSLofHuanghaiSeainthewesterncoastalareaoftheBohaibayin2100.Thetransgrassiveareaisabout10,000-11,500km.Iftheeffectofset-upofstormsurgeisconsidered,thetransgressiveareawillreach16,000km.Sealevelrisewhichisaseriouscoastaldisasternotonlyinundatesalotofcoastallowland,butalsoincreasesthefrequencyandintensityofstormtides,andresultsinthesalinizationofsoils.Inviesofthissituationwerecommendatrinitycomprehensivemeasureoftreatment,namely,"buildingseawalltopreventtides-divertingtheHunagheRivertosettleitssedimentloads-raisingtheconstructionalbase".
简介:Weproposeaschemeforteleportationoffour-levelatomicstatesinthermalcavities.TheschemedoesnotinvolvethegeneralizedBell-stateorgeneralizedGHZ-statemeasurement,whichisdifficultinpractice.Anotherfeatureoftheschemeisthatitdoesnotrequireindividualaddressingofatomsincavityandisinsensitivetobothcavitydecayandthermalfield,whichisofimportanceinpointofexperiment.
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简介:Onthebasisofthedressed-atommodel,thegeneralanalyticexpressionsfortheeigenenergies,eigenstatesandtheiropticalpotentialsoftheA-configurationthree-levelatomsystemarederivedandanalysed.Fromthecalculationofdipolematrixelementofdifferentdressedstates,weobtainthespontaneous-emissionratesinthedressed-atompicture.Wefindthatourgeneralexpressionsofopticalpotentialsforthethree-leveldressedatomcanbereducedtothesameasonesinpreviousreferencesundertheapproximationofasmallsaturationparameter.Wealsoanalysethedependencesoftheopticalpotentialsofathree-level^85Rbatomonthelaserdetuningandthedependencesofspontaneous-emissionratesontheradialpositioninthedarkhollowbeam,anddiscusstheprobability(population)evolutionsofdressed-atomiceigenstatesinthreelevelsinthehollowbeam.
简介:在最低一半的可变厚度--模型水平(LML)经常在大气的模型被使用计算象潜伏、理智的表面那样的诊断的地加热的表面流动。模仿的热带气旋(TC)上的LML的效果进化在使用theWeather研究并且预报的这研究(WRF)被调查模型。当LML被放在12m下面时,结果在TC进化上表明了LML的著名影响。TC增强率与一降低LML日益增多地减少了,但是它的最终的紧张变化是相对小的。最大的10-m风显示出不同行为到最小的海水平压力和平均azimuthally的正切的风,并且因此,风压力关系被改变LML因此改变。TC发行量是更多与更高的LML联合收缩了。表面潜伏的热流动被提高LML极大地提高,在LML的风速度在那里起了一个主导的作用。处于在LML的风速度的变化他们的侧面差别,而且他们被带从的不同高度依赖于不仅。由于提高的表面热流动,更多的强烈的潜伏的热版本发生在eyewall,它增加了暴风雨增强。更高的LML趋于生产更大的暴风雨,因此,表面磨擦被增强它接着和加热的增加的diabatic导致了更强壮的边界层流入。
简介:Knowledgeabouthumanbeingsisanintegralpartofanyintelligentagentofconsiderablesignificance.Delimiting,modelingandacquiringsuchknowledgearethecentraltopicsofthispaper.Becauseofthetremendouscomplexityinknowledgeofhumanbeings,weintroduceatop-levelontologyofhumanbeingsfromtheperspectivesofpsychology,sociology,physiologyandpathology.Thisontologyisnotonlyanexplicitconceptualizationofhumanbeings,butalsoanefficientwayofacquiringandorganizingrelevantknowledge.
简介:Abstract:Hydrologicalregimesinfluenceecologicalpatternsandprocessesaswellasalterratesofwetlandevapotranspiration.ThisstudyaimedtoinvestigatetheimpactofgroundwaterfluctuationonevapotranspirationofPhragmitesaustralis.SupportedbyfielddataobtainedfromtheBaiyangdianLakeinnorthernChina,thevariationsingroundwaterlevelswereexplored,andthechangesinsoilwaterandevapotranspirationofreedwereanalyzedtoinvestigatedifferentgroundwaterlevelscenariosusingHYDRUS-1Dmodel.Theresultsshowedthatsoilwatercontent,rechargedbygroundwater,remainedstableinthelowersoillayerbutvariedstronglyintheupperlayerofthesoilprofile;incomparisontoevaporation,Phragmitesaustralistranspirationcontributedsignificantlymoretotheoverallevapotranspirationrate;thehighlevelsofevapotranspirationcouldbemaintainedwhengroundwaterlevelsvarybetween1.0mand1.8m,whileitwasreducedwithanincreaseingroundwaterlevelsasaresultofwaterstressconditions.TheresultsalsoindicatedthattheevapotranspirationofPhragmitesaustraliscouldmaintainhigherevapotranspirationratesundernaturalwaterlevels.Theevapotranspiration,inotherwords,mightbethemainwaterconsumer,butitneverthelesshaslittleeffectonwaterlevelsduringwatershortages.TheevapotranspirationofPhragmitesaustralisrespondedtothechangesingroundwaterlevelscouldhelpresearchersunderstandwaterrequirementsofthewetlandsandestablishsuitablewaterlevelsforthewetlands.