共查询到20条相似文献,搜索用时 15 毫秒
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INTRODUCTIONTheproblemofmentaloverloadbecamein creasinglyseriouswithdevelopmentofindustrialautomation .Inmanyindustrialstations,itwasbelieved ,operatorswerefrequentlyunderthepressureofhighmonitoringmentalworkloadbe causemanypanelsandotherinstrumentsmust… 相似文献
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INTRODUCTIONItisveryimportantforChinatoachievesustainabledevelopmentbecauseoftheprimaryroleofChinaastheadvocateofpeaceintheworldandespeciallyintheAsiaPacificregion.OverthepastseveraldecadesChinahasincreasinglycometorealizetheTechnologicalInnovation(TI… 相似文献
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INTRODUCTIONInthispaper,weconsiderthefollowingcon vexquadraticprogrammingminf(x) =12 xTQx cTxs.t.Ax≤b ,x≥ 0( 1 )wherec ,xaren vectors,bisanm vector,AisamatrixandQisasymmetricpositivesemi definitem×nmatrix .Theformof( 1 )doesnotlosegenerality ,becauseanypequalitycon st… 相似文献
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INTRODUCTIONFormostofthepast WorldWarⅡera,bankingregulationproceededsmoothly .Sincefewbankfailuresoccurred ,academicsandthepublicpaidlittleattentiontothetopic.Becauseofvariousfactors,bankfailureshavebecomecommonsincethe 1 980sandtheinternationalcommunityhas… 相似文献
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INTRODUCTIONHypertension ,oneofthemostcommoncar diovasculardiseasesaroundtheworld ,isaseri ousthreatagainstpeople slifeandhealth .Hy pertensionwithleftventricularhypertrophy(LVH)isamoreimportantriskfactorthaniso latedhighbloodpressureincausingmorbidityandm… 相似文献
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1 Introduction Eu3 :Y2 SiO5crystalisusedasanewluminescencematerial.Becausethenuclearmomentsofthecom positeelementsaresmallinthiscrystal,thespin spininteractionbetweenguestandhostionsisminimized .Theguest hostinteractiondoesnotcauselargeaddi tionallinebroade… 相似文献
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INTRODUCTIONWehavenoticedthewagedifferentialsacrossindustriesandfirmsintheworld ,andalwaysex plainthisbythehumancapitaltheoryandthecompensatingwagedifferentialsbecauseintheperfectcompetitivelabourmarketwhereworkersacceptjobscanexpecttoreceivecompensat… 相似文献
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INTRODUCTIONSoftsoiliswidelydistributedovercoastalandriversideregions ,wherebecauseoftheirspeciallocations,oil tanksareoftenconstruct ed .Largeoil tankswithheavyloadaresensitivetodifferentialsettlement.Engineersareusuallymoreconcernedwiththedifferentials… 相似文献
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INTRODUCTIONLet{Y(t) ;-∞ <t <∞ }={Xk(t) ;-∞ <t<∞ }∞k=1 beasequenceofindepen dentOrnstein Uhlenbeck (OU)processeswithcoefficientsγk≥ 0andλk>0 ,i.e.,Xk(·)isastationary ,meanzeroGaussianprocesswithEXk(s)Xk(t) =(γk λk)exp( -λk|t-s|) ,k=1 ,2 ,… .TheprocessY(·)wasfirstintroducedbyDawson ( 1 972 )a… 相似文献
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INTRODUCTIONThearchedretainingstructure ,anewtypeofretainingstructureinfoundationpits(Caietal.,1 992 ) ,hasmanyvirtuessuchasmorereason ablestructureshape ,smallerdeformation ,lowercost,andsoon .Butithasnotoftenbeenusedinengineeringbecauseitsanalysismethodisnotr… 相似文献
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1 Introduction Superconductingweaklinksareveryintriguing ,duetothefactthattheserelativesimplestructuresshowJosephsoneffect[1] .Intheory ,onlythestructuresthathavedimensionscomparablewiththecoherencelengthζareexpectedtoshowtrueJosephsonbehavior[2 ,3] .Inpracti… 相似文献
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INTRODUCTIONBesidesintrinsicgastrointestinalabnormali ties,dysmotilityofgastrointestinaltractscanalsobecausedbyendocrinologicproblemssuchasdi abetesmellitus,gastroparesisforexample (Rath mannetal.,1 991 ) .Therelationshipbetweengastrointestinaldysfunctionandp… 相似文献
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INTRODUCTIONPiezoelectricceramicmaterialshavemanyapplicationsinmoderntechnologiesbecauseoftheirexcellentpiezoelectricproperties.Butcracksarisingfromtheirintrinsicbrittlenessof tencausepiezoelectriccomponentsfailure .Studyofwhatcausesthisrequirestheoret… 相似文献
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1 Introduction IronaluminidesbasedonFe3 Alhavemanyadvantagesforstructuralusesatelevatedtemperaturebecauseoftheirexcellentcorrosionresistanceandrelativelylowmaterialcost.However,thesealloyshavenotyetfoundwidespreadusebecausetheyexhibitpoorductilityandbr… 相似文献
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1 Introduction Thesensingofcarbonmonoxideiscriticallyimpor tantforsafetycontrolingasapplications ,becausein completecombustionofgasescancauseseriousCOpoisoning .Developmentofasolid stateCOsensoristhereforedesirableforgasapplications .Intheincom pletecombu… 相似文献
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WANG Ting fu PAN Qing yi ZHANG Jian ping School of Science Shanghai University Shanghai China 《上海大学学报(英文版)》2001,(4)
1 Introduction Thesensingunitofcarbonmonoxideiscriticallyimportantforsafetycontrolin gasapplications ,be causeincompletecombustionofgasescancauseseri ousCO posoning .Developmentofasolid stateCOsensoristhereforedesirableforgasapplications .Inincompletecombu… 相似文献
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INTRODUCTIONHemorrhagicfeverwithrenalsyndrome(HFRS)isanaturalfocaldiseasecausedbyvirusesintheHantavirusgenusofthefamilyBunyaviridae.AtleasteightserologicallydistinctHantaviruseswererecognized.HFRSisendemicinChinaandisonlycausedbyHantaanVirus(typeⅠ)trans… 相似文献
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YANG Shu xia 《渭南师范学院学报》2002,(Z1)
IntroductionThecommunicativeapproachtolanguageteachinghasbeenwelcomedandadoptedinmanypartsoftheworldbecause“itsprinciplesbringthemeansoflearningintoalignmentwithitseventualends———theachievementofanabilitytouselanguagetocommunicativeeffect.Furthermore … 相似文献
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Influence of hydroxypropyl methylcellulose edible coating on fresh-keeping and storability of tomato
NTRODUCTIONDiscardednon degradableplasticfilmswide lyusedinfoodpackagingcause“whitepollu tion”totheenvironment.Inrecentyears,theus 相似文献
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1 Introduction Overexpansionofindustrieshascauseddegradationofenvironmentalqualityespeciallyinthedevelopedcoun tries.Ozonedepletionhasspurredworldwideenviron mentalcontrol. Forambientatmosphere,theregulatoryauthoritiesinChinademandallindustriestoimpleme… 相似文献