简介：Theexperimentaltimeseriesofweldingcurrentproducedbycarbondioxidegasmetalarcweldingwithshort-circuitingtransferwererecordedandsubsequentlyevaluated.Basedonphasespacereconstruction,thecorrelationdimensionsandKolmogoroventropiesofthecorrespondingsystemhavebeennumericallycalculatedusingtheGrassberger-Procacciaalgorithmatdifferenttimedelays.Itwasfoundoutthatthetimedelayhaslittleeffectontheestimationofcorrelationdimension;conversely,itplaysakeyroleinproducingpreciseresultsontheestimationofKolmogoroventropy.

简介：Thispaperintroducedthebasictheoryandalgorithmofthesurrogatedatamethod,whichproposedarigorouswaytodetecttherandomandseeminglystochasticcharacteristicsinasystem.TheGaussiandataandtheRosslerdatawereusedtoshowtheavailabilityandeffectivityofthismethod.Accordingtotheanalysisbythismethodbasedontheshort-circuitingcurrentsignalsundertheconditionsofthesamevoltageanddifferentwirefeedspeeds,itisdemonstratedthattheelectricalsignalstimeseriesexhibitapparentlyrandomnesswhentheweldingparametersdonotmatch.However,theelectricalsignalstimeseriesaredeterministicwhenamatchisfound.Thestabilityofshort-circuitingtransferprocesscouldbejudgedexactlybythemethodofsurrogatedata.