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1.
INTRODUCTIONTheproblemofmentaloverloadbecamein creasinglyseriouswithdevelopmentofindustrialautomation .Inmanyindustrialstations,itwasbelieved ,operatorswerefrequentlyunderthepressureofhighmonitoringmentalworkloadbe causemanypanelsandotherinstrumentsmust…  相似文献   

2.
INTRODUCTIONItisveryimportantforChinatoachievesustainabledevelopmentbecauseoftheprimaryroleofChinaastheadvocateofpeaceintheworldandespeciallyintheAsiaPacificregion.OverthepastseveraldecadesChinahasincreasinglycometorealizetheTechnologicalInnovation(TI…  相似文献   

3.
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   

4.
INTRODUCTIONFormostofthepast WorldWarⅡera,bankingregulationproceededsmoothly .Sincefewbankfailuresoccurred ,academicsandthepublicpaidlittleattentiontothetopic.Becauseofvariousfactors,bankfailureshavebecomecommonsincethe 1 980sandtheinternationalcommunityhas…  相似文献   

5.
INTRODUCTIONHypertension ,oneofthemostcommoncar diovasculardiseasesaroundtheworld ,isaseri ousthreatagainstpeople slifeandhealth .Hy pertensionwithleftventricularhypertrophy(LVH)isamoreimportantriskfactorthaniso latedhighbloodpressureincausingmorbidityandm…  相似文献   

6.
1 Introduction Eu3 :Y2 SiO5crystalisusedasanewluminescencematerial.Becausethenuclearmomentsofthecom positeelementsaresmallinthiscrystal,thespin spininteractionbetweenguestandhostionsisminimized .Theguest hostinteractiondoesnotcauselargeaddi tionallinebroade…  相似文献   

7.
INTRODUCTIONWehavenoticedthewagedifferentialsacrossindustriesandfirmsintheworld ,andalwaysex plainthisbythehumancapitaltheoryandthecompensatingwagedifferentialsbecauseintheperfectcompetitivelabourmarketwhereworkersacceptjobscanexpecttoreceivecompensat…  相似文献   

8.
INTRODUCTIONSoftsoiliswidelydistributedovercoastalandriversideregions ,wherebecauseoftheirspeciallocations,oil tanksareoftenconstruct ed .Largeoil tankswithheavyloadaresensitivetodifferentialsettlement.Engineersareusuallymoreconcernedwiththedifferentials…  相似文献   

9.
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   

10.
INTRODUCTIONThearchedretainingstructure ,anewtypeofretainingstructureinfoundationpits(Caietal.,1 992 ) ,hasmanyvirtuessuchasmorereason ablestructureshape ,smallerdeformation ,lowercost,andsoon .Butithasnotoftenbeenusedinengineeringbecauseitsanalysismethodisnotr…  相似文献   

11.
1 Introduction Superconductingweaklinksareveryintriguing ,duetothefactthattheserelativesimplestructuresshowJosephsoneffect[1] .Intheory ,onlythestructuresthathavedimensionscomparablewiththecoherencelengthζareexpectedtoshowtrueJosephsonbehavior[2 ,3] .Inpracti…  相似文献   

12.
INTRODUCTIONBesidesintrinsicgastrointestinalabnormali ties,dysmotilityofgastrointestinaltractscanalsobecausedbyendocrinologicproblemssuchasdi abetesmellitus,gastroparesisforexample (Rath mannetal.,1 991 ) .Therelationshipbetweengastrointestinaldysfunctionandp…  相似文献   

13.
INTRODUCTIONPiezoelectricceramicmaterialshavemanyapplicationsinmoderntechnologiesbecauseoftheirexcellentpiezoelectricproperties.Butcracksarisingfromtheirintrinsicbrittlenessof tencausepiezoelectriccomponentsfailure .Studyofwhatcausesthisrequirestheoret…  相似文献   

14.
1 Introduction IronaluminidesbasedonFe3 Alhavemanyadvantagesforstructuralusesatelevatedtemperaturebecauseoftheirexcellentcorrosionresistanceandrelativelylowmaterialcost.However,thesealloyshavenotyetfoundwidespreadusebecausetheyexhibitpoorductilityandbr…  相似文献   

15.
1 Introduction Thesensingofcarbonmonoxideiscriticallyimpor tantforsafetycontrolingasapplications ,becausein completecombustionofgasescancauseseriousCOpoisoning .Developmentofasolid stateCOsensoristhereforedesirableforgasapplications .Intheincom pletecombu…  相似文献   

16.
1 Introduction Thesensingunitofcarbonmonoxideiscriticallyimportantforsafetycontrolin gasapplications ,be causeincompletecombustionofgasescancauseseri ousCO posoning .Developmentofasolid stateCOsensoristhereforedesirableforgasapplications .Inincompletecombu…  相似文献   

17.
INTRODUCTIONHemorrhagicfeverwithrenalsyndrome(HFRS)isanaturalfocaldiseasecausedbyvirusesintheHantavirusgenusofthefamilyBunyaviridae.AtleasteightserologicallydistinctHantaviruseswererecognized.HFRSisendemicinChinaandisonlycausedbyHantaanVirus(typeⅠ)trans…  相似文献   

18.
IntroductionThecommunicativeapproachtolanguageteachinghasbeenwelcomedandadoptedinmanypartsoftheworldbecause“itsprinciplesbringthemeansoflearningintoalignmentwithitseventualends———theachievementofanabilitytouselanguagetocommunicativeeffect.Furthermore …  相似文献   

19.
NTRODUCTIONDiscardednon degradableplasticfilmswide lyusedinfoodpackagingcause“whitepollu tion”totheenvironment.Inrecentyears,theus  相似文献   

20.
1 Introduction Overexpansionofindustrieshascauseddegradationofenvironmentalqualityespeciallyinthedevelopedcoun tries.Ozonedepletionhasspurredworldwideenviron mentalcontrol. Forambientatmosphere,theregulatoryauthoritiesinChinademandallindustriestoimpleme…  相似文献   

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