化學(xué)和生命體系中內(nèi)隨機(jī)共振的特性及機(jī)理的理論研究.pdf

1、中國(guó)科學(xué)技術(shù)大學(xué)博士學(xué)位論文化學(xué)和生命體系中內(nèi)隨機(jī)共振的特性及機(jī)理的理論研究姓名：鐘實(shí)申請(qǐng)學(xué)位級(jí)別：博士專(zhuān)業(yè)：物理化學(xué)指導(dǎo)教師：辛厚文2001.5.1AbstractNonlinearchemistryisanewinterdisciplinarysciencewhoseresearchobjectisnonlinearbehaviorsofchemicalsystemsthatoccurfarfromequilibriumIfweca

2、llthesenonlinearbehaviorsnonlinearstates，andalsotakeintoconsiderationthefactthatnoiseiSinevitabteinnaturetheinvestigationonthetransitionanditS1awofthesestatesundertheperturbationofnoiseisofgreatimportanceinnonlinearchemi

3、stryandhasgainedgrowingattentioninrecentyearsNoiseisusuallyconsideredtheenemyoforder，however，recentinvestigationshasshownthatnoisecanplayaconstructiveroleinnonlinearsystemsthroughacounterintuitivemechanismcalledstochasti

4、cresonancerSRlSRiSacooperativebehaviorbetweennonlinearsystem，signalandnoise，ie，thesignalcanbeamplifiedbytheassistanceofnoise，andtheoutputsignaltonoiseratioofthesystemcanreachamaximumwithappropriatenoiselevelRecentlyinter

5、nalSRasanontrivialextensionofSRhasalsoattractedmanyscientists’attentionInternalSRisaSRlikephenomenoninwhichanexternalsignalisabsentInthisdissertation，wehavestudiedthecharacteristicsandmechanismofinternalSRinchemicalandli

6、vingsystemsInchemicalsystem，wehaveinvestigatedthedynamicsofthesystemundertheperturbationofwhiteandcolorednoise，respectively，andalsoinvestigatedthenoisydynamicsofcoupledsystemWefoundthatbothwhitenoiseandcolorednoisecanind

7、uceinternalSR，andthenoisepulselengthofwhitenoiseandcorrelationtimeofcolorednoisestronglyaffecttheresonancebehaviorIncoupledsystem，wefoundthatinternalSRCallbepropagatedandamplifiedbytheassistanceofcoupling，andcouplingstre

8、ngthasatunableparameterCanbeusedtocontrolinternalSRInlivingsystemswehavestudiednoiseeffectsinexcitablebiomembraneandintracellularcalciumoscillationsWefoundtheexistenceofinternalSRinthetwosystems，whichimpliesthatnoisemayb

9、eplayafunctionalrolethroughinternalSRinlivingsystemsInthemajoritystudiesoninternalSR，thepulselengthandcorrelationtimeofnoisewerenottakenintoaccount，furthermore，inthepreviousresearchesincoupledchemicalsystemsandlivingsyst

10、ems，verylimitedattentionispaidtotheeffectsofnoise，SOthatourinvestigationismorerealisticandCanalsoprovidesomeinstructionsforexperimentalworkAlthoughSRhasbeeninvestigatedextensively，thereareverylimitedstudiesoninternalSR，e

11、speciallyinchemicalandlivingsystemsSincechemicalandlivingsystemsoftenOCCurfarfromequilibriumandshowrichcomplexnonlinearbehaviors，itisexpectedthatinternalSRinthesesystemsisrobustWeholdthatinvestigationsinthesesystemsarehe