Приказано за аутора "Marković, Aleksandar"
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Average Bit Error Rate Calculation Based on Using Piecewise Spline Approximation
Marković, Aleksandar; Perić, Zoran; Panić, Stefan; Spalević, PetarIn this paper, an approximation of the average bit error rate (ABER) probability expression, standard performance measure of wireless transmission over fading channels using linear spline functions with corresponding number ... -
Effect of Chemical Composition on the Microstructure and Properties of the Ag-Ga-Ge Alloys
Marković, Aleksandar; Premović, Milena; Minić, Duško; Gurešić, Dejan; Manasijević, Dragan; Đorđević, Aleksandar (Journal of Materials Engineering and Performance, 2019-05)This study presents a comparison of thermodynamically calculated phase compositions of Ag-Ga-Ge alloys at fixed temperatures with phase analysis results of alloys annealed at respective temperatures. Three isothermal ... -
Effect of Chemical Composition on the Microstructure, Hardness and Electrical Conductivity Profiles of the Ag-Bi-Ge Alloys
Marković, Aleksandar; Minić, Duško; Premović, Milena; Manasijević, Dragan; Gurešić, Dejan; Kolarević, Milan (Materials Research, 2019-10)Microstructure, hardness and electrical properties of the selected ternary Ag-Bi-Ge alloys were investigated in this study. Isothermal sections of the Ag-Bi-Ge system at 25, 100 and 500 °C have been extrapolated using ... -
Experimental Investigation of the Ternary Ge-Sn-In and Ge-Sn-Zn Systems
Tošković, Nemanja; Minić, Duško; Premović, Milena; Manasijević, Dragan; Đorđević, Aleksandar; Marković, Aleksandar (Journal of Phase Equilibria and Diffusion, 2018-11)This paper presents results of experimental examinations of alloys from the ternary Ge-Sn-In and Ge-Sn-Zn systems. Differential thermal analysis, scanning electron microscopy with energy dispersive spectroscopy and x-ray ... -
First electrochemical investigation of organophosphorus pesticide azametiphos and its quantification using electroanalytical approach
Vukojević, Vesna; Đurđić, Slađana; Jevtić, Sonja; Pergal, Marija; Marković, Aleksandar; Mutić, Jelena; Petković, Branka; Stanković, DaliborIn this work, the electrochemical behaviour and the subsequent development of an analytical procedure for quantification of pesticide azamethiphos, using boron-doped diamond (BDD) electrode are reported for the first time. ... -
Influence of zero boresight and non-zero boresight pointing error on BER FSO transmission over Malaga atmospheric channel
Smilić, Marko; Perić, Zoran; Milić, Dejan; Marković, Aleksandar; Savić, Milan (Oficyna Wydawnicza Politechniki Wroclawskiej, 2018-03-22)In this paper, the influence of a zero and a non-zero boresight pointing errors on the performances of free-space optic transmission over the Málaga atmospheric turbulence channel is considered. Closed form expressions for ... -
Mathematical Approach for System Repair Rate Analysis Used in Maintenance Decision Making
Kontrec, Nataša; Panić, Stefan; Panić, Biljana; Marković, Aleksandar; Stošović, Dejan (MDPI, 2021-05-20)Reliability, the number of spare parts and repair time have a great impact on system availability. In this paper, we observed a repairable system comprised of several components. The aim was to determine the repair rate ... -
Novel Composite Approximation for the Gaussian Q-Function
Perić, Zoran; Marković, Aleksandar; Kontrec, Nataša; Panić, Stefan; Spalević, Petar (Kaunas University of Technology, 2020-10-27)This paper, by using Borjesson’s and Benitez’s approximation of Q-function, presents a novel and improved composite approximation of Q-function with wide applicability. The presented approach is very general and can be ... -
An Overview of Novel Methods for ASEP Performance Evaluation Based on Q-Function Approximation
Marković, Aleksandar; Perić, Zoran; Panić, Stefan (27th Telecommunications forum TELFOR 2019, 2019-11-27)The closed-form expression for Q-function does not exist so it is necessary to develop its approximation in order to overcome the difficulties that might appear in diverse research areas. In this paper the authors are ... -
Two Interval Upper-Bound Q-Function Approximations with Applications
Perić, Zoran; Marković, Aleksandar; Kontrec, Nataša; Nikolić, Jelena; Petković, Marko; Jovanović, Aleksandra (Mathematics and computer sciences, 2022-10-10)The Gaussian Q-function has considerable applications in numerous areas of science and engineering. However, the fact that a closed-form expression for this function does not exist encourages finding approximations or ...