共查询到20条相似文献,搜索用时 31 毫秒
1.
陈小松 《中南工业大学学报(英文版)》2002,9(1)
Theconceptofoptimalmagiccubeandthewayofconstructingoptimalmagiccubeoforder1 6nwasgivenin 1 988[1] .Howtoconstructopti malmagiccubesofor 相似文献
2.
A new method for estimating system error of guidance instrument 总被引:6,自引:0,他引:6
Theaccuracyoflongrangerocketis,toagreatextent,determinedbytheguidanceaccuracy.Theerrorofguidanceisclassifiedintotwotypes:theerrorofguidancemethodandtheerrorofguidanceinstruments.Withtheperfectionofguidancescheme,theerrorofguidancemethodhasbeenloweredtoo… 相似文献
3.
Theconstructionoftheorthogonalwaveletandcom pactlysupportedonehasalreadybeenperfected[1~ 3] ,fromwhichthepyramidaldecompositionandreconstructionalgorithmhasbeendeduced[4~ 7] .Inthispaper ,wemakeuseofthetwo scaleintegralequationtoconstructadyadicscalefunctionf… 相似文献
4.
0 INTRODUCTIONBecausethestressdistributionatthesurfaceofacavityinanelasticmediumdirectlyinfluencedthestrengthofacomponentinmechanicalmanufactureandarchitecture ,itisatypicalproblemintheme chanics ,architectonics ,nuclearindustryandgeologi calexploration .… 相似文献
5.
0 INTRODUCTIONTheprecisionmachinetoolisfundamentalequip menttofulfilladvancedtechniquesofmanufactoryandtheservocontrolsystemisthekeyfactorbecauseitdecidesthemachiningaccuracy ,surfacequalityandproductivityofthemachinetool.Duetosomeme chanicalstructurere… 相似文献
6.
Itiswellknownthatpredictivecontrolme thodsareveryeffectiveinprocesscontrol,whichhasarousedagreatdealofinterestbothinpracticeandtheory .Receding horizoncontroltechnique ,orthemodelpredictivecontroltechnique ,isoneofthepowerfulapproachesforpredictivecontro… 相似文献
7.
0 INTRODUCTIONPrecisiondesigninvolvesdesignofmaterials ,me chanics ,electronics ,control,thermal mechanics ,dynam icsandsoftwareandeachfactormayhavesomeeffectonthefinalmachiningaccuracy[1] .Errorsourcesrefertofac torsandlocationsthatcanproducemachiningerrors .… 相似文献
8.
0 INTRODUCTIONAcrackisusuallyregardedasofzero thicknessandinclosecontactwiththemediaoneithersideandthereisnocontactforcebetweencracks.Thecrackscansupportnotonlystressbutalsopullandshearingforce ,sothemediumbetweencrackskeepsthecon tinuumofstressanddispl… 相似文献
9.
Cooling simulation of plastic injection molding 总被引:2,自引:0,他引:2
0 INTRODUCTIONInjectionmoldingisacyclicprocesswhereinmeltingpolymerisforcedintoacoldmetalmoldunderhighpres sureandcooleduntilitissolidenoughtobeejectedfromthemold .Coolingisacrucialpartoftheinjectionmoldingcycle ,becauseithasamajorimpactonboththequality… 相似文献
10.
刘军 《武汉理工大学学报(材料科学英文版)》2003,18(1):61-64
1 IntroductionThehighmechanicalproperties ,gooddurabilityandappropriateworkabilityarenecessaryforhighperformanceconcretetosatisfytheconstructionrequirementoflarge scaleconcreteengineering .Accordingtodifferentapplica tionsandpurposes ,inordertoimprovethe… 相似文献
11.
唐新峰 《武汉理工大学学报(材料科学英文版)》2002,17(3)
1 IntroductionTheelectricaltransportproperties (conductiontype ,carrierconcentration ,carriermobility ,carriereffectivemass)andthethermaltransportproperties (atomdis placementparameter ,meanfreepathofphonon ,latticethermalconductivity)offilledskutteruditecomp… 相似文献
12.
ACID RECOVERY FROM WASTE SULFURIC ACID BY DIFFUSION DIALYSIS 总被引:1,自引:0,他引:1
Zhang Guiqing Zhang Qixiu Zhou Kanggen 《中南工业大学学报(英文版)》1999,6(2):103-106
Intheprocessofsulfuricacidproductionfrompyrite,thefumeproducedinpyriteroastingiswashedwithdiluteacid,andagreatdealofwastesulfuricacidwiththeconcentrationof8%~10%isproduced[1].Thiswastesulfuricacidcannotbeuseddirectlybecauseofitsrelativelyhighimpurity… 相似文献
13.
JIANG Bin-hao 《哈尔滨工业大学学报(英文版)》2000,7(3):14-18
0 INTRODUCTIONAproblemofcontinuingandwidespreadinterestinelectromagnetictheoryisthatofelectromagneticradiationorscatteringbyperfectlyconductingobjectsofarbitraryshapelocatedovergroundplane .Itisconvenientandefficienttogiveatreatmentfortheelectromagnet… 相似文献
14.
Zhang Qixiu Luo Aiping 《中南工业大学学报(英文版)》1999,6(2):73-77
Agreatdealoflowconcentrationlyeisoftenproducedinaluminaplantforvariousreasons.Itisnoteconomicaltoreuseitbydirectconcentrationthroughevaporation.Soconcentrationwithmembraneisconsidered.Thelowconcentrationlyeintheredmudmoundwaschosenfortreatment… 相似文献
15.
Thedislocationemissionfromthecracktipandthenucleationandpropagationofmicrocrackscanbestudiedbyinsitutensiletestunderatransmissionelectronmicroscope(TEM)[1—3].However,thereisnostudyonatomicscalemicrostructureofcracktips,especiallyonthoseofloadedcracks.Fora… 相似文献
16.
1 IntroductionRareearthelements (REE)areextensivelyap pliedowingtoitsspecialroleasgeochemicaltracer.Theycanprovidemuchgeologicalandgeochemicalinformationsuchascharacterofsourcerock ,coal formingenvironment,andoriginofrock .Rareearthelementsarecommonelement… 相似文献
17.
0 INTRODUCTIONTheinnerwindingofalargepowertransformerissubjectedtoradialelectromagneticforcesundershort cir cuitconditions .Whentheseforcesexceedacertainlimit,thetransformerinnerwindingbuckles .Soundershort cir cuitconditionsthedynamicbucklingoflargepower… 相似文献
18.
Complexperovskiterelaxorferroelectricsisakindofspecialdielectricmaterial.Comparedwithnormalferroelectrics,ithasspecialdielectricproperties,e.g.thediffusephasetransition(DPT),astrongfrequencydispersionofthedielectricconstant,polarizationchangingwithtemper… 相似文献
19.
OfflinehandwrittenChinesecharacterrecognition(referredtoasChinesecharacterrecognitionorCCRforshortinthefollowing)isatypicallargenumberofclassespatternrecognitionproblem.Thepropertiesoflargevocabulary,complexstructureandlotsofsimilarcharacterswhichChine… 相似文献
20.
Determination of thermal conductivity of magnesium-alloys 总被引:7,自引:0,他引:7
Thermalconductivityandthermaldiffusivityarecrucialtometallicmaterialsastheyaffecttheheattransferrateintheprocessingprocessandtherefore,influencethethermophysicalperfor manceofthemetalproducts .Therefore ,itisofimportanceformetallurgicalindustrytodetermi… 相似文献