?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fwww.eledia.org%2Fstudents-reports%2F735%2F&rft.title=Microwave+Imaging+of+Buried+Objects+having+Different+Permittivities+through+an+Innovative+Multi-Frequency+Stochastic+Method&rft.creator=Salucci%2C+M.&rft.creator=Poli%2C+L.&rft.creator=Anselmi%2C+N.&rft.creator=Massa%2C+A.&rft.subject=A+WC+Next+Generation+Wireless+Communications&rft.subject=M+EA+Evolutionary+Algorithms&rft.description=This+work+deals+with+the+retrieval+of+the+electromagnetic+characteristics+of+inaccessible+subsurface+domains+by+processing+ground+penetrating+radar+(GPR)+data.+Assuming+a+multi-frequency+(MF)+formulation+of+the+buried+inverse+scattering+problem%2C+the+solution+is+obtained+by+means+of+a+multi-resolution+particle+swarm+optimization+(PSO)+algorithm.+The+developed+MF-IMSA-PSO+method+is+able+to+proficiently+exploit+the+intrinsic+frequency+diversity+of+wideband+GPR+measurements+in+order+to+mitigate+the+ill-posedness+and+non-linearity+issues+of+the+subsurface+inverse+scattering+problem.+Moreover%2C+thanks+to+the+integration+of+the+PSO+within+the+iterative+multi-scaling+approach+(IMSA)+an+increased+resolution+of+the+retrieved+images+is+obtained+within+the+identified+regions+of+interest%2C+where+the+buried+objects+are+supposed+to+lie.+Some+numerical+experiments+are+shown+in+order+to+assess+the+effectiveness%2C+the+robustness+to+noise%2C+as+well+as+the+current+limitations%2C+of+the+developed+method+in+retrieving+buried+scatterers+having+different+levels+of+electric+permittivity+(i.e.%2C+different+levels+of+contrast+with+respect+to+the+surrounding+background+medium).+Moreover%2C+a+direct+comparison+with+respect+to+the+MF-IMSA-CG%2C+a+state-of-the-art+approach+based+on+a+conjugate+gradient+(CG)+local+search+algorithm%2C+is+given.&rft.publisher=University+of+Trento&rft.date=2016&rft.type=Monograph&rft.type=NonPeerReviewed&rft.format=text&rft.language=en&rft.identifier=http%3A%2F%2Fwww.eledia.org%2Fstudents-reports%2F735%2F1%2FMicrowave%2520Imaging%2520of%2520Buried%2520Objects%2520having%2520Different%2520Permittivities%2520through%2520an%2520Innovative%2520Multi%25E2%2580%2590Frequency%2520Stochastic%2520Method.pdf&rft.identifier=++Salucci%2C+M.+and+Poli%2C+L.+and+Anselmi%2C+N.+and+Massa%2C+A.++(2016)+Microwave+Imaging+of+Buried+Objects+having+Different+Permittivities+through+an+Innovative+Multi-Frequency+Stochastic+Method.++Technical+Report.+University+of+Trento.+++++