简介：Twokindsofgaseswereusedtoinvestigatetheinfluenceofgasdensityonthehydrodynamiccharacteristicsinabubblecolumn.Itcanbefoundoutthathighergasdensityleadstosmallerbubblediameterandtheflowpatternsaredifferentforthebothgases.Energybalancemechanismsareanalyzedbyconsideringthegasdensitydifference.Modelsweredevelopedtopredicttheaveragebubblediameterwithgoodaccuracy.

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简介：Anincreasingnumberofannealingfurnaceshaverecentlybeenusingcheaperandcleanernaturalgas(NG)insteadofliquefiedpetroleumgas(LPG)asfuelgas.However,thefuelgasofthefurnacesoftenneedstobechangedwhenNGsupplyisnotadequateorwhenLPGbecomescheaper.Usually,changingthefuelgasinvolveschangingvariousequipmentaswellascontrolparametersforinstrumentsandthecontrolsystemandhenceistimeconsuming.Therefore,itisimportanttodevelopaquickprocessforchangingfuelgas.Thisstudydiscussesthetechniquesforquicklychangingfuelgasinanannealingfurnace.Thesetechniquesdealwiththedesignofthepipe,valveandburner,theselectionoftheflowmeterandtheflowcontrolvalve,theswitchofthesoftwareandparametersforthecontrolsystem,aswellastheoperation,commissioningandhottestofthefurnacewhenthefuelgasischanged.Usingthesetechniques,itispossibletochangefuelgasin6h.

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简介：Theunifiedgas-kineticscheme(UGKS)ispresentedandusedinthislettertostudythesliderairbearingproblem.TheUGKSsolutionsarefirstvalidatedbycomparisonwithdirectsimulationMonteCarloresults.Aftervalidation,theUGKSisusedtostudytheair-bearingproblemunderdifferentnonequilibriumconditions.Onthesurfaceoftheslider,thedependencyofthegaspressureandnormalforceontheMachandKnudsennumbersarefullyevaluated.Thenon-equilibriumeffectontheforceloadinginthewholetransitionregimeuptothefreemolecularlimitisalsostudied.

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简介：Theinfluencingfactorsforliquidphasecatalyticoxidationofminegastomethanol(informofCH3COOCH3)arestudiedusingtheself-establishedexperimentalapparatus.TheresultsshowthatCH3COOCH3(targetproduct)isobtainedbyusingCH3COOHasreactionsolvent,andtheyieldoftargetproductincreaseswiththeincreasingofreactiontemperature,gaspressureandreactiontime.Intheminegas-Pd(OAc)2-CH3COOHsystem,theyieldofCH3COOCH3increaseswiththeincreasingofadditionofPd(OAc)2whichisredoxcatalystforminegasconversion.TheyieldofCH3COOCH3willbegreatlyimprovedbycompositeadditionaloxidantwhichisobtainedbyequimolarmixofp-benzoquinonewithNO2.

简介：Becauseofthelowtemperature,largewastegasvolume,highpollutantcontent,andcomplicatedcompositions,wasteheatrecoveryandemissiongastreatmentofsinteringfluegashavealwayspresentedachallengeinthesteelindustry,andthisissuehasattractedwidespreadattentionbothlocallyandabroad.Recently,basedonthefirstdomesticpilotplantanddemonstrationproject,Baosteelhasperformedaseriesofinnovativeresearchanddevelopmentinvestigationsonitssinteringfluegasrecirculating(SFGR)process,inwhichthesystemdesignandoptimization,dioxin-relatedcontaminantsourcesuppression,orematchingstructureoptimization,wear-resistantdesignofcyclingfansandpipelines,high-efficiencydustremovalequipment,systemcontrolandstableoperationstrategy,fluegasmixingandswitchingcontrol,circularhoodsealing,oxygencontentconditioning,recirculationsinteringsystemprocesscontrol,andmodeldevelopmenthavebeenstudied,andacompletesetofequipmentandtechnologyfortheSFGRprocesshasbeeninitiallydeveloped.TheinvestigationresultssuggestthattheSFGRprocesscannotonlysignificantlyreduceexhaustgasvolumeandpollutantemissionsbutalsorecoverlow-temperaturewasteheatandreducetheenergyconsumptionofsintering;therefore,theoveralltechnologiespossessgreatvalueinenergysavings,pollutionemissionreduction,andsinteringorequality/yieldimprovement.

简介：TheSCIimpactfactorofJournalofNaturalGasChemistry(JNGC)is1.788,accordingtothe'2013JournalCitationReports(JCR)ScienceEdition'.ThisisthehighestSCIimpactfactorforJournalofNaturalGasChemistrysincethejournalwasincludedintheScienceCitationIndexExpanded(SCIE)in2007,anditranksfirstamongchemistryjournalsinChina.Overthepastdecade,theJournalofNaturalGasChemistryhasbecomemoreandmoreinternationalandhasreceivedlargenumbersofmanuscriptsconcerningenergychemistry.Indeed,nowadaysenergychemistryisbecomingoneofthehottopics.

简介：TheeasternJungarregioninXinjiangwillconstructthelargestinChinacoalgasificationprojectwiththegasoutputreaching30billionm3/a.ItislearnedthattheStateDevelopmentandReformCommissionhasofficiallyap-

简介：这研究在Jiaoshiba区域和煤气的累积模式的Longmaxi形成基于沉积条件，器官的地球化学，存储空格，物理性质，岩性学和页岩气体水库的煤气的内容被总结然后与那相比在北美洲。在在Jiaoshiba的Longmaxi形成的页岩气体水库有好地质的条件，优秀页岩的大厚度，高器官的满意的、高煤气的内容，好物理性质，合适的深度，好保藏条件和好水库类型。在深架的底部的优秀页岩是为页岩气体探索和开发的主要目标间隔。在Longmaxi形成的页岩气体经历了三个主要reservoiring阶段：烃产生和压缩的早阶段页岩气体水库是什么时候，首先形成了；深埋葬和大规模烃产生的中间的阶段，它与页岩气体引起了水库的丰富；迟了的阶段高举，侵蚀和破裂开发当页岩气体水库最后被形成时。

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简介：ThispaperstudiesthecurrentavailableoptionsforfloatingproductionplatformsindevelopingdeepwateroilfieldsandthepotentialdevelopmentmodelsoffutureoilandgasexplorationintheSouthChinaSea.Adetailedreviewofcurrentdeepwaterplatformsworldwidewasperformedthroughtheexamplesofindustryprojects,andtheprosandconsofeachplatformarediscussed.Fourtypesofplatformsarecurrentlyusedforthedeepwaterdevelopment：tensionlegplatform,Spar,semi-submersibleplatform,andthefloatingproductionsystemoffloading.Amongthese,theTLPandSparcanbeusedfordrytreeapplications,andhavegainedpopularityinrecentyears.Thedrytreeapplicationenablestheextensionofthedrillingapplicationforfixedplatformsintofloatingsystems,andgreatlyreducesthecostandcomplexityofthesubseaoperation.Newlybuiltwettreesemi-submersibleproductionplatformsforultradeepwaterarealsogettingtheirapplication,mainlyduetothemuchneededpayloadfordeepwatermakingtheconversionoftheolddrillingsemi-submersibleplatformsimpossible.Theseplatformshavebeenusedindifferentfieldsaroundtheworldfordifferentenvironments;eachhasitsownadvantagesanddisadvantages.Therearemanychallengeswiththesuccessfuluseofthesefloatingplatforms.Alotoflessonshavebeenlearnedandextensiveexperienceaccumulatedthroughthemanyprojectapplications.Keytechnologiesarebeingreviewedforthesuccessfuluseoffloatingplatformsforfielddevelopment,andpotentialfuturedevelopmentneedsarebeingdiscussed.SomeofthetechnologiesandexperienceofplatformapplicationscanbewellusedforthedevelopmentoftheSouthChinaSeaoilandgasfield.

简介：Surfactantenhancedremediationisthoughttobeaneffectivemethodfortheremediationofsoilspollutedwithhydrophobicorganiccompounds.Desorptionofpolycyclicaromatichydrocarbons(PAHs)fromanabandonedmanufacturedgasplant(MGP)soilwasevaluatedusingfourelutingagentsincludingTritonX-100(TX100),sodiumdodecylbenzenesulfonate(SDBS),rhamnolipidwatersolution(RWS)andrhamnolipidfermentationbroth(RFB).TheweightsolubilizationratiosforacenaphtheneandfluorenewereintheorderofTX100>SDBS>RWS>RFB.TheSmvalue,whichindicatesthemaximumamountsofsurfactantsadsorbedinthesoil,wasintheorderofRWS>RFB>SDBS>TX100.Byusing8gL-1ofTX100,SDBSandRWSand100%ofRFB,theT-PAHsremovalfortheMGPsoilcontaminatedwith207.86mgT-PAHskg-1drysoilwas48.0%,45.7%,1.9%,and8.6%,respectively,whilethatdecreasedto41.6%,37%,0.38%,and1.3%forthesoilcontaminatedwith3494.78mgT-PAHskg-1drysoil.Only8gL-1TX100couldremovealltypesofthe16PAHspartlyintheMGPsoil,andtheremovalefficienciesofdifferentPAHsrangedfrom13%to77.8%.TheresultsofthisstudyhereinprovidevaluableinformationfortheselectionofTX100surfactantforremediatingPAH-contaminatedsoilsinMGP.

简介：Themainpurposeofthispaperistwo-fold:(i)togeneralizeanexistenceresultforacompressiblegas-liquidmodelwithafrictiontermrecentlypublishedbyFriisandEvje[SIAMJ.Appl.Math.,71(2011),pp.2014–2047];(ii)toderiveauniquenessresultforthesamemodel.Amainingredientintheexistencepartistheobservationthatwecanconsiderweakerassumptionsontheinitialliquidandgasmass,andstillobtainanexistenceresult.Comparedtotheabovementionedwork,werelyonamorerefinedapplicationoftheestimatesprovidedbythebasicenergyestimate.Concerningtheuniquenessresult,weborrowideasfromFangandZhang[NonlinearAnal.TMA,58(2004),pp.719–731]andderiveastabilityresultunderappropriateconstraintsonparametersthatdeterminerateofdecaytowardzeroattheboundaryforgasandliquidmasses,andgrowthrateofmassesassociatedwiththefrictiontermandviscouscoefficient.

简介：许地山经典全集本书收录了作者的散文、小说与诗歌作品。许地山前期代表作品有短篇小说集《缀网劳蛛》和散文小品集《空山灵雨》，其中散文名篇《落花生》是作者最具代表性的作品。这篇语言淳朴、情感真挚的散文在中国可谓老幼皆知，

简介：一、选择题（每题4分，共20分）1．已知两圆的半径分别为3cm和2cm，圆心距为5cm，则两圆的位置关系是（）．

简介：Theflowcharacteristicsinaspouted-fluidbeddifferfromthoseinspoutedorfluidizedbedsbecauseoftheinjectionofthespoutinggasandtheintroductionofafluidizinggas.Theflowbehaviorofgas-solidphaseswaspredictedusingtheEulerian-Euleriantwo-fluidmodel(TFM)approachwithkinetictheoryforgranularflowtoobtaintheflowpatternsinspouted-fluidbeds.Thegasfluxandgasincidentanglehaveasignificantinfluenceontheporosityandparticleconcentrationingas-solidspouted-fluidbeds.Thefluidizinggasfluxaffectstheflowbehaviorofparticlesinthefountain.Inthespouted-fluidbed,thesolidsvolumefractionislowinthespoutandhighintheannulus.However,thesolidsvolumefractionisreducednearthewall.

简介：学校号召我们做“节电小管家”。我想：电视台有“非常6＋1”，我何不来个“节电1＋6”呢？也就是由我一个人，带动爸爸妈妈、爷爷奶奶、外公外婆六个人一起节电。我这个想法得到了家人的一致同意。于是，我义制定了《家庭节电公约》，一个星期评比一次“节电标兵”，对于最浪费电的人要进行严惩：负责搞一星期的家庭卫生。