共查询到20条相似文献,搜索用时 46 毫秒
1.
Thedislocationemissionfromthecracktipandthenucleationandpropagationofmicrocrackscanbestudiedbyinsitutensiletestunderatransmissionelectronmicroscope(TEM)[1—3].However,thereisnostudyonatomicscalemicrostructureofcracktips,especiallyonthoseofloadedcracks.Fora… 相似文献
2.
0 INTRODUCTIONMonitoringofmachiningprocess ,suchasmoni toringchatterandtoolwearinmilling ,isclassicprob lembasedonsignalprocessing .Signals (suchasvi bration ,forceandacousticemission)collectedbythesensorsaretypicallyaffectedbytheprocessdefects ,processworki… 相似文献
3.
Howtoreducethefillcostisoneofthemostimportantproblemsfacingthemineswhichusece mentedfillmethod .Thekeytothesuccessisfindingcheapersubstitutesofcement.Flyashisthesolidwastesinpowderproducedbyburningcoalinthermalpowerplants.Accordingtostatis tics ,thedisch… 相似文献
4.
0 INTRODUCTIONAcrackisusuallyregardedasofzero thicknessandinclosecontactwiththemediaoneithersideandthereisnocontactforcebetweencracks.Thecrackscansupportnotonlystressbutalsopullandshearingforce ,sothemediumbetweencrackskeepsthecon tinuumofstressanddispl… 相似文献
5.
Inrecentyears,intelligentstructuresandsmartsystemshavebecomeahottopic.Becauseoftheirdirectandconversepiezoelectriceffects,piezoelectricmaterialshavebeenwidelyusedtomakevarioustransducersandactuatorsandhaveimportantapplicationsinhightechnologysuchasele… 相似文献
6.
《中南工业大学学报(英文版)》1999,(2)
Electrodematerial,especiallyanodematerial,isadecisivefactorforthesuccessofanelectrolysistechnologicalprocess.Itssuperpotentialvalueisdirectlyrelatedtotheenergyconsumptionofdirectcurrentintheelectrolysisprocess.Itslifespanisthekeyintheindustrializati… 相似文献
7.
Oneoftheactualproblemsinasolid -statephysicsisnumericalcalculationsofphysicalpropertiesofsolids .Inthisworkwepresentthecomputercode″Dynam icsofcrystallattice″ .Thiscomputercodeisdevotedtothenumericalcalculationsofbasicphysicalpropertiesofcrystal.Theprima… 相似文献
8.
V.A.Kravchuk 《哈尔滨工业大学学报(英文版)》2000,(Z1)
Metalstructurestakeanimportantplaceingeneralscopeofstructuralconstructions .Theprincipalfieldoftheirusageishigh risers ,largetrussspanstructuresandindustrialbuildingswithcraneequipmentandextremetechnologicalprocess .Incomparisonwithreinforcedcon cretestr… 相似文献
9.
李曦 《武汉理工大学学报(材料科学英文版)》2003,18(1)
1 IntroductionChemicalssuchasheavymetalsandorganiccom poundspossiblehaveeffectsontheenvironmentandthreatstohumanhealth .However,agriculture ,industry ,andmedicinerelyontheuseofpreciselythesechemicals .Practicalresolutionoftheseconflictinginterestsrequires… 相似文献
10.
0 INTRODUCTIONPrecisiondesigninvolvesdesignofmaterials ,me chanics ,electronics ,control,thermal mechanics ,dynam icsandsoftwareandeachfactormayhavesomeeffectonthefinalmachiningaccuracy[1] .Errorsourcesrefertofac torsandlocationsthatcanproducemachiningerrors .… 相似文献
11.
Recently ,ceramicmaterialshavebeengivenalotofattentionascandidatesforimplantmate rialssincetheypossesscertainhighlydesirablecharacteristicsforsomeclinicalapplicationsofhu manskeletonsubstitution ,heartvalvesrenewing ,dentalcrownrepairing .Ideally ,thephysi… 相似文献
12.
AlLisystemalloysareoflowerdensity,higherspecificstrength.Buttheyarecharacterizedbylowductilityandfracturetoughness,whichseverelylimittheircommercialapplication.Itisgenerallyagreedthatprimaryfactoroflowtoughnessissliplocationsthatoccurasaresultofworking… 相似文献
13.
Closecontactmeltingcanbefoundinnatureaswellasinavarietyoftechnicalfieldssuchasmetallurgy,nucleartechnology,welding,especiallyinlatentheatthermalstoragesystemsofsolarenergy,heatpump,airconditioningandspacecrafttechniques,etc.Asphereencapsulatedwithphasec… 相似文献
14.
Cyclopropylamineisanimportantintermediateforsynthesisofantibioticmedicinessuchasciprofloxacin,profloxacin,sparfloxacin,etc.,andisusedtopreparefinechemicals.Thoughsomeresearchersstudiedthesynthesisofcyclopropylamine,thismethodisnotsuitableforlargescalepr… 相似文献
15.
Faultstructure ,oftenmadeupofmanyfaultsofdi fferentscales ,issignatureofthecourse ,stateandinten sityofrockfracturing .Becauseofheterogeneityofphysi calbehaviorofrockanddifferenceoftectonicaction ,faultsystemoftenappearsdisorderedandunsystematiconthesurfac… 相似文献
16.
郭志忠 《哈尔滨工业大学学报(英文版)》2001,8(4)
0 INTRODUCTIONTheloadcharacteristicshavesignificanteffectonsystemdynamicsandthusconstitutethemostimpor tantelementinhighqualitystabilityassessmentin cludingvoltagestability[1] .AlthoughclassicalloadmodelssuchasconstantP Q ,constantimpedanceandconstantcurr… 相似文献
17.
Electronic structures and properties of V, Nb and Ta metals 总被引:3,自引:0,他引:3
0 IntroductionTodesignalloysscientifically ,systematicscienceframeofmetalsandalloysincludingthesystematicscienceofpuremetals (one atom (OA)theory) [1,2 ]andthesys tematicscienceofalloys (characteristiccrystal(CC)the ory) [3~ 6 ]areestablished ,whichcangivediagramsof… 相似文献
18.
盖秉政 《哈尔滨工业大学学报(英文版)》2001,8(1)
0 INTRODUCTIONThereissuchalargenumberofinterfacesinnaturalmediaandengineeringstructuresasthefracturesurfaceinearth’scrust ,theconnectingsurfacebetweenthemachineparts,thecontactsurfacebetweenstructures ,thelayercleavageincomposite ,thecracksurfaceinengine… 相似文献
19.
0 INTRODUCTIONItiswellknownthatheterogeneousquasi brittleag gregatematerialssuchasconcrete ,rocks ,ceramics ,andvariousparticle dispersedorfiberreinforcedcompositesexperienceanincreaseinfracturetoughnessastheirsizeincreases .Anessentialcharacteristicofquas… 相似文献
20.
Zhang Guiqing Zhang Qixiu Zhou Kanggen Luo Aiping 《中南工业大学学报(英文版)》1999,6(2):95-98
Theproductionofwastesulfuricacidisauniversalprobleminmetallurgicalandchemicalprocess.Atpresent,theusualmethodtotreatitistoneutralizeitbeforedischarging.Buttheneutralizationprocessisnotonlyunabletorecoverthevaluablecomponentsulfuricacid,butalsocons… 相似文献