UVODGrađevinski inženjeri često se bave prirodnim rizicima. Ekstremni događaji, kao što su poplave, uragani, zemljotresi, mogu odneti mnogo ljudskih života i izazvati štete od više milijardi dolara.Paradoksalno, takođe je potrebno znati posledice i neuobičajeno niskih protoka, koji mogu da rezultuju visokim koncentracijama zagađivača. I pored toga, inženjeri moraju da projektuju građevinske konstrukcije tako da mogu da izdrže ekstremne poplave, jake vetrove, a konstrukcije na moru da izdrže neuobičajeno visoke talase. Opstanak datog sistema zavisiće od sposobnosti da izdrže ove ekstremne uslove kojima su izloženi, a koji nisu uobičajene vrednosti [7]. Ciljevi ovoga rada jesu (i) modeliranje godišnjeg maksimalnog protoka na reci Rasini, na jugu centralne Srbije, sa Gumbelovom, Frešetovom i GEV raspodelom,(ii) upotreba Kolmogorov-Smirnov testa i AndersonDarling testa prilikom testiranja i upoređivanja empirijskih i teorijskih funkcija raspodele koje predviđaju ove tri raspodele, (iii) nalaženje potrebnih projektnih vrednosti za dati povratni period.
Abstract:We considered a new view on transition process from periodic to aperiodic signals, in time and spectral domains, pointing out how the concept of infinity is involved. It contributes to better understanding of the nature of both spectral descriptions, and conditions of their practical use, particularly in unusual cases. There we highlight the invariance in spectrum convergence by introducing some numerical parameters which exactly describe such process. Their behaviour is numerically examined to detail. Also, we considered the opposite transition, from aperiodic to periodic, to clarify the meaning of spectral line. To suggest applicability of our analysis we used an actual seismic signal. By extracting the most prominent waveform part, regarding influence on structures, we formed a periodic signal which line spectrum can clearly show possible resonance with vibrating tones of structures.
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