共查询到20条相似文献,搜索用时 15 毫秒
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0 INTRODUCTIONPetroleumisanimportantenergysourceandin dustrialrawmaterial,whichhasimportanteffectsonnationaleconomyandnationaldefense .Atpresent,thecontradictionbetweentheneedforenergyandtheprospectivereservesisveryobviousinthewholepetroleumindustry .Int… 相似文献
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王兴涛 《哈尔滨工业大学学报(英文版)》2002,9(3)
0 INTRODUCTIONItisallknownimportanceofcontrolequationsandadjointequationsinproblemofoptimalcontrol .General ly ,controlequationsandadjointequationsarefoundbyestablishingHamiltonianfunctionaccordingtoPontryagin’smaximumprinciple .Butitisdifficulttoderivet… 相似文献
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0 INTRODUCTIONThemirosotrobotleaguesetupisviewedasanoverallcompleteautonomousframeworkcomposedofthephysicalnavigationalroboticagents,avideocameraover lookingtheplayingfieldconnectedtoacentralizedinterfacecomputer,andthreeclientsasthemindsofthesmall siz… 相似文献
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Preparation of 2024/3003 gradient materials by semi-continuous casting using double-stream-pouring technique 总被引:5,自引:0,他引:5
1 INTRODUCTIONGradientmaterialscombinetheadvantagesofindividualrawmaterialsandhavelargedegreeoffreedomindesign .Sotheyareviewedasanewgenerationofcompositematerialsandhavedrawngreatattention .Manynewpreparationtechnologiesweredeveloped[1 7] .Thepreparationt… 相似文献
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朱建军 《中南工业大学学报(英文版)》2002,9(3)
1 INTRODUCTIONInGPSpositioning ,wesometimesneedsomeotherinformationtohelppositioning ,forexample ,navigationincityregion ,navigation 相似文献
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0 INTRODUCTIONPathplanningofrobotmeansthatrobotfindsapaththatisasafestandthemostefficientpathintheworkspaceofrobot.Commonly,therearemanypathsinwhichtherobotcanexecuteappointedwork ,butinfact,therobotmustfindaoptimumpath[1 ] .Usually ,therobotmustselectashor… 相似文献
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1 INTRODUCTIONThestandardchemicalmethodsforthedeter minationofsevenimpuritiesincobaltoxidein cludetwodifferentmethods (AASforCa ,AESforZn ,Ni,Fe ,Cu ,MnandPb) [1] .Onlyafewstudieshavebeenreportedforthedeterminationofimpuritiesinhigh puritycobaltoxide .Kujiraiand… 相似文献
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1 SYNOPSISTOSTATEMONITORINGANDFAULTDIAGNOSISDEVICEOFHOMO AXLECATALYSISCHIEFBLOWERGROUPThispaperfocusesonrecallingaccidentsystem .Be causeitisapartofthewholedevice ,wegiveabriefin troductiontothedevicefirst .ThesaiddeviceisshownasFig .1wherethethickframessh… 相似文献
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0 INTRODUCTIONIntheexperienceformulathestiffnessofrollerbear inghasnothingtodowithrollerdiameter .InthispaperauthorsproverelationshipoftherollerbearingstiffnesswithrollerdiameterfromHzcontactingtheory .Thatcon clusioninexperienceformulaisonlyapproximate… 相似文献
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0 INTRODUCTIONGameplaying ,asthefirstcombinationoftheartifi cialintelligencetechniqueandphysicalgame,promotestheprogressanddevelopmentoftheintelligencetechnol ogyresearchgreatly,andenlargestheeffectoftheintel ligencetechnology .Butbeingthesecondcombinatio… 相似文献
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Effect of additive on synthesis of MnZn ferrite nanocrystal by hydrothermal crystallization 总被引:1,自引:0,他引:1
1 INTRODRCTIONWithregardtothestudyofcrystalgrowthunits,researchersmainlyconcentrateonthedissolutionofsolute ,theformationofgrowthunitsandthetransportationofthecrystalgrowthunittotheinterface ,aswellasthecongruencyofthegrowthunitsontheinter facesofthecry… 相似文献
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0 INTRODUCTIONSignalsingularityandirregularitydiscontinuityfractioncontainmuchimportantinformation ,theyareoneofthemostsignificantcharacteristicsofsig nal[1,2 ] .Infaultdiagnosis,outputsignalcontainsdis continuity ,itismeaningfulfordetectingthedisconti nuity… 相似文献
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0 INTRODUCTIONThetwomaintechniquestopredictthelong termmechanicalbehaviorsandlifetimeforpolymericmaterialsaretime temperatureandstress timesuperposition .Bothexploitthefactthatcreeporrelaxationratesincreasewithincreasingtemperatureandstress.Theircommond… 相似文献
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1 INTRODUCTIONThenickel basedsuperalloysarethemostwidelyusedhigh temperaturestructuralmaterialsformanufacturingaeronauticalengine 相似文献
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OptimalControlofaeroelasticStochasticVibrationofAerocraftWANGSHIZHONGSHENYIZHANGYONGZHUYINFA王世忠,沈毅,张涌,朱银法(Dept.ofAstronautics... 相似文献
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0 INTRODUCTIONAmongmethodsofwear resistanceincreaseofma chinesfrictionunitsmanagementofthisoperationalprop ertyatthedesigningtechnologicalprocessstageofdetailsmanufacturingoccupiesthespecialplace .Anopportunitytopredictbeforehandacertainlevelwear resist… 相似文献
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0 INTRODUCTIONColloidchemistryisthesubjectsclosetoengi neeringprojectsandeasytobeintersectedwithothersubjects .Modernindustryandagricultureprovidecol loidchemistrywithagoodfield (forexamplepetro chemicalindustry ,painting ,printinganddying ,mineralseparatin… 相似文献
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Recognition of vertical vowel graphemes of Korean characters based on combination of vowel graphemes
0 INTRODUCTIONKoreancharactershavethebothcharacteristicsofChinesecharactersandwesternwords ,they ,likeChinesecharacters ,arearrangedin 2 dimensionalregion ,andontheotherhand ,likewesternwords ,thebasiclogiccom ponentsofthemaregraphemes .Koreancharactersgener … 相似文献
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0 INTRODUCTIONROTGDisanewtypeoflessteethdifferenceplane tarygeardrive .Itsfeaturesincludesmallvolume ,com pactstructure ,highloadcapacity ,hightransmissioneffi ciency .Therefore ,itisexpectedtobewidelyappliedinengineeringfields .However,designmethodofROTGDisc… 相似文献
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1 INTRODUCTIONThechiralnatureoflivingsystemshasev identimplicationsonbiologicallyactivecom poundsinteractingwiththem .Onamolecularlevel,chiralityrepresentsanintrinsicpropertyofbuildingsubstancesoflife ,suchasaminoacidsandsugaretc.Asaresult,thedifferentena… 相似文献