简介:Ananalysisofthepresentandofthefutureoftherefractoriesindustryisbeingpresented,consideringsomeimportanttechnical,economical,humaandenvironmentalissues,onaworldwidebasis.Refractoriesarestillneededasconfinementmaterialstopreventheatandmasstransferlossesinmanydiversemanufacturingindustries,andwillremainso,butthemainchallenges,thisindustrydoneedtomeet,aretoadjusttoanovercapacityproduction,tocopewithnewneedsofthecustomers,inparticularthe"outsourcing",whichisanewcustomer/supplierrelationshipbeingadoptedbymanyofthem,andtokeeptheresearchanddevelopmentaliveinamoreandmorecompetitivearena.Amongthedirectconsequences,aretheneedtokeeptheeducationworldinrefractoryengineeringtrainingaliveandtocopewithmacroandmicroprojectstochangetheimageoftheRefractories,fromacommoditymaterialtoasophisticated"high-tech"compositematenal.Somesuggestionsareprovidedinthetext.
简介:Alongwithdynamicsininternationallifeandadvancesinmilitaryrevolution,aprofoundtransformationisunderwayinworldsecuritylandscapeatthebe-ginningofthenewtentury.Anewroundofmilitaryexpansionisinprogressamongmajormilitarypowers,notablytheUnitedStatesand-itsWesternaUies.therebyaggravatingimbalancesintheworldmititarystrategicconfiguration.Thiswillposenewchallengestoworldpeaceanddevelopment.
简介:GeologicalProspectingReadytoEnterthe21stCenturyDONGDUNAMGYIBeforethe1950s,therewasnomapoftibetinitstruesense.Thisremotepartof...
简介:Powerreliabilitypromotedin1sthalfof1997Fromthestatisticsof27municipalitiesandprovincialcapitalscollectedbythePowerReliability...
简介:<正>Foranoddfunctionf(x)definedonlyonafiniteinterval,thispaperdealswiththeexistenceofperiodicsolutionsandthenumberofsimpleperiodicsolutionsofthedifferentialdelayequation(DDE)(?)(t)=-f(x(t-1)).Byuseofthemethodofqualitativeanalysiscombinedwiththeconstructingofspecialsolutionsaseriesofinterestingresultsareobtainedontheseproblems.
简介:Theoneplusone(1+1)modeofhydrosilationreactionofladderlikecis-isotaticpolyallylsilsesquioxane(AllyI-T)andpolyhydrosilsesquioxane(H-T)usingdicyclopentadienylplatinumdichloride(Cp2PtCl2)asthecatalystleadstotheformationofanewpolyorganosiloxane(POS).ThepresenceofnanoscaletubularstructureintheproductPOSwaspreliminarilyprovedbyIR,1H-NMR,differentialscanningcalorimetry(DSC),X-raydiffraction(XRD),gelpermeationchromatography(GPC),atomicforcemicroscopy(AFM)andmolecularsimulation.
简介:笑容的力量位于美国俄亥俄州的RMI公司曾一度生产滑坡,工作效率低下,利润上不去。后来,公司派丹尼尔任总经理,企业很快改变了面貌。丹尼尔的办法很简单,他在工厂里到处贴上这样的标浯“如果你看到一个人没有笑容,请把你的笑容分些给他。”“任何事情只有做起来兴致勃勃,才能取得成功。”标语下签了丹尼尔的名字。丹尼尔还把工厂的厂徽改成一张笑脸。平时,丹尼尔总是春风满面,笑着同人打招呼,笑着向工人征询意见,全厂2000名工人的名字他都能叫得出来。