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359 个结果
  • 简介:Invarioustemperatures,theeffectsofinorganicacidsonthefreephenollevelinliquefactionproductswereinvestigated.Inthispaper,thefreephenollevelwasusedasanindicatortoevaluateliquefactionefficiency.Resultsshowedthatsulfuricacidwasthebestamongthe4acids.Undertheconditionofreactiontemperature150oC,reactiontime1.5h,liquefactionratio(liquid/particleboard)4andcontentofsulfuricacid6%,thefreephenollevelintheliquefactionproductsofwasteparticleboardis36.95%,andthatoforiginalparticleboardis24.27%.

  • 标签: 碎料板 液化 苯酚 无机酸 催化剂 效应
  • 简介:Theprobailityofcranelivinginreedywetlandscanreach100%,atthesametime,theareaofreed,thewaterlevelandadjacentwaterareaaremainfactorswhichcontrolthecrane''''''''shabitatselection.Weallknowthatallthesefactorsarespatiallyheterogeneous.FortheXianghaiwetlandsafetyandtoprotecttheXianghaiwetlandhabitatofcrane,thispaperhasmainlyidentifiedasolutiontotheseproblems.ThewetlandinformationisextractedfromtheTMimages,whichreflectthewholewetlandlandscapeandareveryimportantforbothquantitativeanalysisofremotesensingobservationoftheearthsystemandpositioninganalysisinGISdatabasethatisautomaticallyextractedfromDEM.TheDEMforXianghaicharacteristicsoftopographyiscreated.OnthebasisoftheGRIDSUBMODULE,applyingtheGISspatialoverlayanalysis,therelationshipbetweenthewaterlevelandthereedareabelowthewaterlevelandtheratingdistributionmapsofreedareaabovewaterlevelisestablished,Whenthewaterlevelreachesthealtitudeof165n,thereedarea,981.2haismaximum,i.e.,thewaterlevelof165mistheoptimal.

  • 标签: 芦苇 湿地 栖息地 遥感
  • 简介:当运用一个实验时,试验性的单位的不同类可以导致处理效果的差的评价。因此,在运用实验前选择一个好堵住的图案是合乎需要的。主要,一个单个块变量在文学被使用为简洁对待不同类。在实践,然而,不同类经常来自多堵住变量。最近,称为B2-GMC的一个新标准为二水平的常规图案被建议与多堵住变量。这份报纸在第一次构造一些B2-GMC图案上建议一个系统的理论。实验者们能容易根据构造方法获得B2-GMC图案。B2-GMC图案的职业人员在节4被加亮,并且有小跑尺寸的图案为实际使用在附录B被公布。

  • 标签: 图案 构造方法 职业人员 实验 同类
  • 简介:Radiointerference(RI),asanaftereffectofcoronadischarge,isanimportantresearchtopicinthefieldofelectromagneticcompatibility,whereexcitationfunctionisappliedbroadlytothepredictionofRIlevel.ThispaperpresentsthetheoryofexcitationfunctionmethodusedintheRIlevelprediction.Then,somepracticalproblemsrelatedtothismethodarediscussed.Thepropagationprocedureofcoronacurrentissolvedbythephase-modaltransformation,andtheimpedancematrixofmultitransmissionlinesiscalculatedbyadoublelogarithmicapproximatemodelofCarson'sGround-Returnimpedance.Atthesametime,inordertocalculatetheRIlevelwhentotallinecoronaisassumed,ananalyticalformulaisdeducedforintegraloperation.Basedontheabovesolutions,analgorithmispresentedandappliedtothepredictionofRIlevelofapracticaloverheadtransmissionline.Comparisonofpredictionandmeasurementresultsindicatesthatthealgorithmproposedinthispaperiseffectiveandfeasible.

  • 标签: 电晕放电 预测 激励 应用 架空输电线路
  • 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".

  • 标签: sea level RISE Bohai BAY COASTAL
  • 简介:Weproposeaschemeforteleportationoffour-levelatomicstatesinthermalcavities.TheschemedoesnotinvolvethegeneralizedBell-stateorgeneralizedGHZ-statemeasurement,whichisdifficultinpractice.Anotherfeatureoftheschemeisthatitdoesnotrequireindividualaddressingofatomsincavityandisinsensitivetobothcavitydecayandthermalfield,whichisofimportanceinpointofexperiment.

  • 标签: 热腔场 四能级原子态 多原子四能级纠缠态 量子隐形传态
  • 简介:Onthebasisofthedressed-atommodel,thegeneralanalyticexpressionsfortheeigenenergies,eigenstatesandtheiropticalpotentialsoftheA-configurationthree-levelatomsystemarederivedandanalysed.Fromthecalculationofdipolematrixelementofdifferentdressedstates,weobtainthespontaneous-emissionratesinthedressed-atompicture.Wefindthatourgeneralexpressionsofopticalpotentialsforthethree-leveldressedatomcanbereducedtothesameasonesinpreviousreferencesundertheapproximationofasmallsaturationparameter.Wealsoanalysethedependencesoftheopticalpotentialsofathree-level^85Rbatomonthelaserdetuningandthedependencesofspontaneous-emissionratesontheradialpositioninthedarkhollowbeam,anddiscusstheprobability(population)evolutionsofdressed-atomiceigenstatesinthreelevelsinthehollowbeam.

  • 标签: 原子物理学 解析解 三层修正原子模型 原子光学 铷原子 原子本征态
  • 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。

  • 标签: 热带气旋强度 表面摩擦 层高 标准 结构 大气模型
  • 简介:StateAdministrationofTraditionalChineseMedicine(SATCM),jointlywithNationalHealthandFamilyPlanningCommission(NHFPC),issuedresultsofsurveyonhealthcareliteracyoftraditionalChinesemedicine(TCM)onMarch31.Asthefirstnationalspecialsurveyonsciencepopularizationof

  • 标签: 国家中医药管理局 健康 养水 公民 中国 计划生育
  • 简介:Knowledgeabouthumanbeingsisanintegralpartofanyintelligentagentofconsiderablesignificance.Delimiting,modelingandacquiringsuchknowledgearethecentraltopicsofthispaper.Becauseofthetremendouscomplexityinknowledgeofhumanbeings,weintroduceatop-levelontologyofhumanbeingsfromtheperspectivesofpsychology,sociology,physiologyandpathology.Thisontologyisnotonlyanexplicitconceptualizationofhumanbeings,butalsoanefficientwayofacquiringandorganizingrelevantknowledge.

  • 标签: 计算机心理学 人类生存本体论 知识获取
  • 简介:Abstract:Hydrologicalregimesinfluenceecologicalpatternsandprocessesaswellasalterratesofwetlandevapotranspiration.ThisstudyaimedtoinvestigatetheimpactofgroundwaterfluctuationonevapotranspirationofPhragmitesaustralis.SupportedbyfielddataobtainedfromtheBaiyangdianLakeinnorthernChina,thevariationsingroundwaterlevelswereexplored,andthechangesinsoilwaterandevapotranspirationofreedwereanalyzedtoinvestigatedifferentgroundwaterlevelscenariosusingHYDRUS-1Dmodel.Theresultsshowedthatsoilwatercontent,rechargedbygroundwater,remainedstableinthelowersoillayerbutvariedstronglyintheupperlayerofthesoilprofile;incomparisontoevaporation,Phragmitesaustralistranspirationcontributedsignificantlymoretotheoverallevapotranspirationrate;thehighlevelsofevapotranspirationcouldbemaintainedwhengroundwaterlevelsvarybetween1.0mand1.8m,whileitwasreducedwithanincreaseingroundwaterlevelsasaresultofwaterstressconditions.TheresultsalsoindicatedthattheevapotranspirationofPhragmitesaustraliscouldmaintainhigherevapotranspirationratesundernaturalwaterlevels.Theevapotranspiration,inotherwords,mightbethemainwaterconsumer,butitneverthelesshaslittleeffectonwaterlevelsduringwatershortages.TheevapotranspirationofPhragmitesaustralisrespondedtothechangesingroundwaterlevelscouldhelpresearchersunderstandwaterrequirementsofthewetlandsandestablishsuitablewaterlevelsforthewetlands.

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