报告题目：Understanding bat and whale signals with time frequency transforms
报告专家：Luca?De?Marchi
报告时间：6月12日15:00
报告地点：#腾讯会议：949-370-524
报告内容：Non-stationary signals such as bat and whale chirps can be analyzed by means of time-frequency representations(TFRs). Unfortunately, any TFR is subjected to the time-frequency uncertainty principle. This, in general, limits the capability of TFRs to characterize multiple, closely spaced echoes from a time-transient measurement, over a wide frequency range.
To overcome this limitation, novel time-frequency decompositions can be implemented. Such decompositions may be designed with a more flexible tiling of the time-frequency domain in order to achieve enhanced signal analysis capabilities. The proposed transformation is fast, invertible, and covariant to group delay shifts. The lecture will discuss how such mathematical operators are also suitable for the analysis of ultrasonic signals in the non-destructive inspection of structures and materials, or for the characterization of the marine environment with SONAR.
专家简介：Luca?De?Marchi?received?the?Ph.D.?degrees?in?electronics?engineering?from?the?University?of?Bologna,?Bologna,?Italy,?in?2006.?In?2011,?he?joined?the?Department?of?Electrical?and?Information?Engineering,?University?of?Bologna,?where?now?he?is?Associate?Professor.?Since?2003,?he?has?been?collaborating?with?the?Advanced?Research?Center?for?Electronic?Systems.?His?current?research?interests?are?in?ultrasonic?systems?and?adaptive?signal?processing,?with?a?particular?emphasis?on?structural?health?monitoring?applications.In?this?field,?he?has?puglished?more?than?200?publications?and?he?holds?two?patents.