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INTRODUCTIONATMhasgreatsuperiorityincertainaspects,suchasresourceallocationflexibility ,qualityofserviceguaranteeing ,integratedtrafficsupport ing ,etc .ATMhasbeenadoptedbyInternation alTelecommunicationUnion (ITU)astheex changeandmultiplexingtechniquesofth… 相似文献
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INTRODUCTIONAmongmodelsusedtomathematicallyana lyzetheSAWfilter;themostimportantare ( 1 )delta functionmodel;( 2 )thecross fieldmodel;( 3 )theimpulse responsemodel.EachmodelcandescribemathematicallytheSAWfilter,considersomesecond ordereffects,andcanre vealsomeimpo… 相似文献
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