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1.
Inrecentyears,intelligentstructuresandsmartsystemshavebecomeahottopic.Becauseoftheirdirectandconversepiezoelectriceffects,piezoelectricmaterialshavebeenwidelyusedtomakevarioustransducersandactuatorsandhaveimportantapplicationsinhightechnologysuchasele…  相似文献   

2.
Electrodematerial,especiallyanodematerial,isadecisivefactorforthesuccessofanelectrolysistechnologicalprocess.Itssuperpotentialvalueisdirectlyrelatedtotheenergyconsumptionofdirectcurrentintheelectrolysisprocess.Itslifespanisthekeyintheindustrializati…  相似文献   

3.
0 INTRODUCTIONAcrackisusuallyregardedasofzero thicknessandinclosecontactwiththemediaoneithersideandthereisnocontactforcebetweencracks.Thecrackscansupportnotonlystressbutalsopullandshearingforce ,sothemediumbetweencrackskeepsthecon tinuumofstressanddispl…  相似文献   

4.
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   

5.
Cyclopropylamineisanimportantintermediateforsynthesisofantibioticmedicinessuchasciprofloxacin,profloxacin,sparfloxacin,etc.,andisusedtopreparefinechemicals.Thoughsomeresearchersstudiedthesynthesisofcyclopropylamine,thismethodisnotsuitableforlargescalepr…  相似文献   

6.
ithrecentadvancesinpolymersynthesistechniques,increasingattentionisbeingpaidtotheanalysisofinteractionofelectromagneticwaveswithcompositematerials.Ithasbecomeanimportantfieldtoinvestigatetheelectromagneticpropertiesandtheapplicationperspectiveofthosem…  相似文献   

7.
0 INTRODUCTIONTheloadcharacteristicshavesignificanteffectonsystemdynamicsandthusconstitutethemostimpor tantelementinhighqualitystabilityassessmentin cludingvoltagestability[1] .AlthoughclassicalloadmodelssuchasconstantP Q ,constantimpedanceandconstantcurr…  相似文献   

8.
Thedislocationemissionfromthecracktipandthenucleationandpropagationofmicrocrackscanbestudiedbyinsitutensiletestunderatransmissionelectronmicroscope(TEM)[1—3].However,thereisnostudyonatomicscalemicrostructureofcracktips,especiallyonthoseofloadedcracks.Fora…  相似文献   

9.
ThehighqualityofkaolinwhichisabundantincoalmeasuresinChinahasattractedmuchattentionofpeopleallovertheworld .Becauseofthehighcontentofcarbon ,thiskindofkaolinmustbecal cinedtoincreaseitswhitenessbeforeitcanbeinten sivelyprocessed .Thesurfacemodificationof…  相似文献   

10.
0 INTRODUCTIONMonitoringofmachiningprocess ,suchasmoni toringchatterandtoolwearinmilling ,isclassicprob lembasedonsignalprocessing .Signals (suchasvi bration ,forceandacousticemission)collectedbythesensorsaretypicallyaffectedbytheprocessdefects ,processworki…  相似文献   

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