Aleksandra Marjanović

University of Belgrade

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Co-Authors

Sanja Vujnović

University of Belgrade

ŽĐ

Željko Đurović

University of Belgrade

Goran Kvaščev

University of Belgrade

ŽD

Željko Djurović

University of Belgrade

Predrag Tadić

University of Belgrade

Miroslav Krstić

University of California, San Diego

ŽZ

Žarko Zečević

University of Montenegro

Elio Usai

University of Cagliari

Mihailo Micev

University of Montenegro

Predrag Vasilic

University of Belgrade

Cooperative Institutions

University of Belgrade

University of Cagliari

University of Montenegro

University of Belgrade - School of Electrical Engineering

Univerzitetski Klinički Centar Srbije

Universidad Nacional Autónoma de México

Regione Puglia

University of Catania

University of Novi Sad

Singidunum University

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A Practical Solution for Control of Fan Drives Load in Thermal Power Plants

Advanced Science Letters (2012)

Goran Kvaščev Željko Djurović Aleksandra Marjanović

10.1166/asl.2013.4461

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One Realization of an Industrial Device for Machine State Estimation

U. Rakonjac P. Jandric Sanja Vujnović Aleksandra Marjanović Goran Kvaščev

Performing maintenance checks and state detection of machines with rotary actuators in industry is a challenging task which requires expensive and complicated equipment. One of the ways to perform this is using a system based on recording and analysis of sounds the machine makes during operation. This paper describes an approach which uses a simple, compact device based on a commercial microcomputer that aims to entirely replace the state detection system. It is able to record acoustic signals in close proximity to the machine, process them and use a neural network to output the state of the rotary actuator. The testing has been done on real acoustic signals recorded in the thermal power plant Kostolac in Serbia.

Realization (probability)

Micro computer

10.1109/it51528.2021.9390133

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Gap Celebrates Love on Pinterest and Instagram

Aleksandra Marjanović

The ‘Love Comes In Every Shade’ campaign is the newest from Gap, celebrating the diverse shapes and forms that love can take. From married love to puppy love, Gap’s newest print ads show celebrity pairs in a bright pallet of garments this brand is known for. The photos, done by photographer Peggy Sirota, are wonderfully executed…

Puppy

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Adaboost algorithm in the frame of predictive maintenance tasks

Predrag Vasilic Sanja Vujnović Nikola Popović Aleksandra Marjanović Željko Đurović

The paper proposes a method for state change detection in rotary machines. The procedure relies on recorded signals spectrogram analysis and features appropriate for texture classification in digital images. Final classification in terms of machine health is performed using Adaboost algorithm. The application of this algorithm is proposed for thermal power plant fan mills whose impact plates are damaged during the coal grinding process. The main goal of the procedure is to detect the amount of wear of the impellers and to determine the appropriate timing for unnecessary maintenance tasks. Real acoustic signals for verification of this algorithm are recorded in thermal power plant Kostolac A1 in a coal grinding subsystem.

AdaBoost

Spectrogram

10.1109/spit.2018.8350846

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Citations (8)

Budweiser Black Crown to Be Launched With a Super Bowl Ad

Aleksandra Marjanović

The one beer out of three that went through a nationwide, crowd sourced taste test and come out victorious has been dubbed the Budwieser Black Crown. “Project 12” is an initiative created by Anheuser-Busch InBev to activate the public in their search for a new molt that would help promote the brand and win back…

Launched

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Walter and GoDaddy Both Score Big With Super Bowl Ad

Aleksandra Marjanović

According to Networked Insights, the Super Bowl ad most talked about through social media networks was the newest from GoDaddy, labeled “Perfect Match”, which features supermodel Bar Rafaeli and Hollywood extra, Jesse Heiman as a stereotypical tech nerd. If you’ve had any previous encounters with GoDaddy commercials, you could guess that whatever happens is bound…

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Diesel Calculates Your Days to Live

Aleksandra Marjanović

Diesel has come up with a brilliant new way to get you to buy their watches – by telling you you’re going to die. Maybe not today, maybe not tomorrow, but sometime in the future. And they’ll even tell you when that exact moment is if you answer a multimedia questionnaire at the site for…

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Control of Thermal Power Plant Combustion Distribution Using Extremum Seeking

IEEE Transactions on Control Systems Technology (2016)

Aleksandra Marjanović Miroslav Krstić Željko Đurović Branko Kovačević

High demands for increasing robustness, safety, and efficiency in thermal power plants are the main motivation behind ongoing attempts to optimize combustion. This paper presents a study of modeling and control of the combustion process in a tangentially fired pulverized-coal boiler. It proposes an approach to flame geometry and position control by means of reallocation of firing. Such control ensures flame focus maintenance away from the walls of the boiler, and thus prevents many unwanted by-products of combustion. In addition, uniform heat dissipation over mills enhances the energy efficiency and reliability of the boiler. First, experimental data obtained from the 350-MW boiler of the Nikola Tesla power plant, Serbia, are analyzed in detail. This results in a model identification procedure using an adaptive parameter estimation method. Second, constrained multivariate extremum seeking (ES) is proposed in this paper, to optimally tune boiler operation in order to maintain the desired flame configuration in the furnace. Finally, the effectiveness of the ES adaptive controller in the presence of disturbances is demonstrated through simulations performed on the experimentally identified model of the boiler.

Pulverized coal-fired boiler

Robustness

Thermal efficiency

10.1109/tcst.2016.2627499

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Citations (38)

Nivea Refreshes its Logo and Packaging Design With Help From Yves Béhar

Aleksandra Marjanović

The simple look of the clean, white lettering imprinted in a royal blue circle of tin stands for the legacy of Nivea, internationally known for its multipurpose cream but having expanded to include a very large number of skincare products throughout the years. The problem with having such a large pallet of merchandise to offer…

Lettering

Pallet

Logo (programming language)

White (mutation)

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Acoustic contamination detection using QQ-plot based decision scheme

Mechanical Systems and Signal Processing (2018)

Sanja Vujnović Aleksandra Marjanović Željko Djurović

Quantile

Robustification

SIGNAL (programming language)

Plot (graphics)

10.1016/j.ymssp.2018.06.040

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Citations (4)