?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fwww.eledia.org%2Fstudents-reports%2F380%2F&rft.title=Evolutionary+Techniques+For+Inverse+Scattering%3A+Current+Trends+and+Envisaged+Developments&rft.creator=Rocca%2C+Paolo&rft.creator=Benedetti%2C+Manuel&rft.creator=Donelli%2C+Massimo&rft.creator=Massa%2C+Andrea&rft.subject=TU+Technical+Reports+and+Publications&rft.description=The+possibility+of+sensing+a+given+region+from+the+measurements+of+the+scattered+field+when+it+is+illuminated+through+low-power+microwave+electromagnetic+waves+is+still+a+topic+of+great+interest+due+to+the+wide+range+of+applications+in+many+different+areas+of+medical%2C+industrial%2C+and+civil+engineering.+For+instance%2C+let+us+consider+problems+related+to+biomedical+engineering%2C+non-invasive+thermometry%2C+non-destructive+testing+and+evaluation%2C+geophysical+analysis%2C+remote+sensing%2C+and+archeology.+Although+this+list+is+certainly+non-exhaustive%2C+it+is+sufficient+to+justify+the+great+attention+devoted+to+the+solution+of+inverse+scattering+problems+both+from+a+theoretical+and+algorithmic+point+of+view%2C+as+demonstrated+by+the+large+amount+of+papers+and+books+available+in+the+scientific+literature.+The+issues+that+actually+limit+the+proliferation+of+practical+imaging+systems+are+the+intrinsic+theoretical+difficulties+(i.e.%2C+ill-posedness+and+non-linearity)%2C+which+characterize+an+inverse+scattering+problem.+The+ill-posedness+can+be+avoided+by+using+additional+(a-priori)+information+directly+taken+from+the+physics+of+the+problem+at+hand.+This+strategy+allows+one+to+avoid+the+reconstruction+of+artifacts+and+obtain+the+so-called+regularized+solutions.+Concerning+the+non-linearity+of+the+inverse+scattering+model%2C+it+must+be+considered+to+take+into+account+the+multiple-scattering+effects%2C+since+linear+approximations+(e.g.%2C+Born-like+approaches)+can+be+rarely+applied+to+real+objects.+Accordingly%2C+many+non-linear+inversion+techniques+have+been+proposed+for+the+optimization+of+a+suitable+cost+function+taking+into+account+the+mismatch+between+the+measured+data+and+the+reconstructed+ones.+Originally%2C+various+deterministic+approaches+based+on+steepest-descent+algorithms+%5Be.g.%2C+conjugate-gradients+(CG)%5D+were+proposed+%5B1%5D.+Although+they+have+shown+to+provide+successful+results%2C+they+suffer+the+presence+of+local+minima+when+initial+solution+does+not+belong+to+the+%E2%80%9Cattraction+basin%E2%80%9D+of+the+global+optimum.&rft.date=2011-01&rft.type=Technical+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fwww.eledia.org%2Fstudents-reports%2F380%2F1%2FDISI-11-189.C178.pdf&rft.identifier=++Rocca%2C+Paolo+and+Benedetti%2C+Manuel+and+Donelli%2C+Massimo+and+Massa%2C+Andrea++(2011)+Evolutionary+Techniques+For+Inverse+Scattering%3A+Current+Trends+and+Envisaged+Developments.++%5BTechnical+Report%5D+++++