Претрага
520 items
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Nonequilibrium athermal random-field Ising model on hexagonal lattices
Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević. "Nonequilibrium athermal random-field Ising model on hexagonal lattices" in Physical Review E, American Physical Society (APS) (2021). https://doi.org/10.1103/PhysRevE.103.032147
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Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry
Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalizationSteven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti. "Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945979
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Challenges of Energy Transition in the Individual Heating Sector
U radu su prikazani rezultati istraživanja i ankete koja je sprovedena 2020. godine u domaćinstvima sa individualnim sistemima grejanja u Srbiji. Cilj ankete je bio da se sagleda stanje individualnih sistema grejanja, ali i stavovi vlasnika sistema vezano za energetsku tranziciju. Rezultati ukazuju na zastarelost sistema grejanja, nisku efikasnost, nedovoljna ulaganja u primenu mera energetske efikasnosti i nedostatak finansijskih sredstava za ulaganje u održivo grejanje. Osnovni prioriteti kod izbora načina grejanja jesu troškovi kupovine sistema i troškovi energenta, dok ...Boban Pavlović, Dejan Ivezić, Marija Živković. "Challenges of Energy Transition in the Individual Heating Sector" in Energija, ekonomija, ekologija, University Library in Kragujevac (2022). https://doi.org/10.46793/EEE22-1.17P
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Why classical sequence stratigraphy doesn't work in Pannonian basin?
Dejan Radivojević (2018)... flooded this systems tract is very hard to distinguished from early rift climax systems tract. Besides initial rift systems tract also early (S3a), middle (S3b) and late (S3c) rift climax systems tract is alinated. In grabens with low subsidence, one or more of that systems tract could be absent ...
... some places close to the fault it has hummocky geometry. This systems tract is not confirmed in all half‐ graben and could be related to the moment of initial rifting in certain graben. Essentially it represents initial rifting systems tract formed in continental/alluvial environment (Prosser ...
... ably below seismic resolution level, so their recognition was not possible. The early rift cli‐ max systems tract usually ends up with downlap on pre‐Tertiary formations or on the initial rift systems tract. Early rift climax sediments are usually present only in deep parts of the basin. The reason ...Dejan Radivojević. "Why classical sequence stratigraphy doesn't work in Pannonian basin?" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)
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Sustainable transition of district heating systems in Serbia, or can engineers do it alone?
Ivezić Dejan, Živković Marija (2018)Ivezić Dejan, Živković Marija. "Sustainable transition of district heating systems in Serbia, or can engineers do it alone?" in Digital Proceedings of the 3rd South East European Conference on Sustainable Development of Energy, Water and Environment Systems, Novi Sad: (2018): 0206-1-10
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Available technological procedures for capturing CO2 in the industrial and power generation sectors
Climate change is a major environmental issue caused by anthropogenic emissions of greenhouse gases. Capturing CO2 and storing it in suitable geological formations is one of the main technological solutions that can provide mitigation of CO2 emission into the atmosphere. Capturing CO2 represents the first phase in process of carbon capture and storage, and includes the application of various technologies for the separation of CO2 produced in the energy and industrial sectors. There are four main systems for capturing ...... mailto:dusan.danilovic@rgf.bg.ac.rs mailto:branko.lekovic@rgf.bg.ac.rs mailto:miroslav.crnogorac@rgf.bg.ac.rs 250 2. CO2 CAPTURE SYSTEMS There are four main systems for capturing CO2 that can prevent releasing CO2 into the atmosphere, such as: capturing from industrial process stream, capturing ...
... CO2 capture systems depends on more factors. Post-combustion CO2 capture is the most mature option, and it can be integrated into existing power plants. The main disadvantage of post- combustion is low concentration of CO2 (5-15%) that affects the capture efficiency. Pre-combustion systems are more suitable ...
... au/about-ccus/carbon-capture/ https://www.ccsbrowser.com/ https://netl.doe.gov/research/coal/energy-systems/gasification/gasifipedia/capture-approaches https://netl.doe.gov/research/coal/energy-systems/gasification/gasifipedia/capture-approaches https://www.globalccsinstitute.com/about/what-is-ccs/capture/ ...Lola Tomić, Vesna Karović Maričić, Dušan Danilović, Branko Leković, Miroslav Crnogorac. "Available technological procedures for capturing CO2 in the industrial and power generation sectors" in 8th International Conference Mining and Environmental Protection, 22 – 25th September 2021, Serbia, Univerzitet u Beogradu, Rudarsko-geološki fakultet (2021)
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Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic
This work presents a model for determining the availability of continuous systems at open pits by applying fuzzy logic and fuzzy inference systems. The applied model was formed by the synthesis of independent partial indicators of availability. The model is based on an expert system for assessing the availability of continuous mining systems. The availability of the system, as a complex state parameter, is decomposed into the partial indicators, reliability, and convenience of maintenance, and the fuzzy compositions, used ...системи, континуални систем експоатације, површински коп, рударство, расположивост, фази логика, max–min композиција, min–max композицијаMiljan Gomilanović, Miloš Tanasijević, Saša Stepanović. "Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic" in Energies, MDPI AG (2022). https://doi.org/10.3390/en15186786
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A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach
Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependabilityNikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović. "A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach" in Applied Sciences, Basel, August 2024, MDPI (2024). https://doi.org/https://doi.org/10.3390/app14177947
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Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation
Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2023)The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović. "Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation" in Thermal Science, National Library of Serbia (2023). https://doi.org/10.2298/TSCI220813168I
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Excitable systems with internal and coupling delays
Burić Nikola, Grozdanović Ines, Vasović Nebojša. "Excitable systems with internal and coupling delays" in Chaos, Solitons & Fractals 36 no. 4, USA:Chaos, Solitons & Fractals (2008): 953-861
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Coupled dynamical systems with internal delays and delayed coupling: behavior and bifurcations
Grozdanović Ines (2007)Grozdanović Ines. "Coupled dynamical systems with internal delays and delayed coupling: behavior and bifurcations" in Facta Universitatis 5 no. 1, Niš:Mechanical Engineering (2007): 11-21
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Noise induced coherent oscilations in Fitz Hugh-Nagumo excitable systems influenced by coupling delay
Grozdanović Ines (2011)Grozdanović Ines. "Noise induced coherent oscilations in Fitz Hugh-Nagumo excitable systems influenced by coupling delay" in Proceedings of III International Congress of Serbian Society of Mechanics, Vlasina lake: (2011)
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Noise induced coherent oscilations in Fitz Hugh-Nagumo excitable systems influenced by coupling dela
Grozdanović Ines (2011)Grozdanović Ines. "Noise induced coherent oscilations in Fitz Hugh-Nagumo excitable systems influenced by coupling dela" in III International Congress of Serbian Society of Mechanics, Vlasinsko jezero: (2011)
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Influence of interaction delays on noise-induced coherence in excitable systems
Burić Nikola, Todorović Kristina, Vasović Nebojša. "Influence of interaction delays on noise-induced coherence in excitable systems" in Physical Review E 82 no. 3, Vašington:American Physical Society (2010)
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Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names
In this paper we present a rule- and lexicon-based system for the recognition of Named Entities (NE) in Serbian news paper texts that was used to prepare a gold standard annotated with personal names. It was further used to prepare training sets for four different levels of annota tion, which were further used to train two Named Entity Recognition (NER) sys tems: Stanford and spaCy. All obtained models, together with a rule- and lexicon based system were evaluated on ...... Entity Recognition Systems for Serbian - The Case of Personal Names Branislava Šandrih, Cvetana Krstev, Ranka Stanković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case ...
... NER systems based on Ma- chine Learning methods that were trained on the corpus derived from the gold standard, while the evaluation and discussion of results are presented in Sections 4 and 5, respectively. In Section 6 we present a web platform that enables use and eval- uation of these systems. Finally ...
... tween three NER system remains the same. We also compared performance of all three NER systems by each named entity type (Fig- ure 3). Results for all three models distinguishing entity types show that all three systems perform poorly in recognizing first names only. For STAN- FORD NER and SPACY NER it ...Branislava Šandrih, Cvetana Krstev, Ranka Stanković. "Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names" in Proceedings - Natural Language Processing in a Deep Learning World, Incoma Ltd., Shoumen, Bulgaria (2019). https://doi.org/10.26615/978-954-452-056-4_122
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Characterization and utilization of main aquifer systems of the Mahe Island (Seychelles)
Stevanović Zoran, Maran Aleksandra (2012)Stevanović Zoran, Maran Aleksandra. "Characterization and utilization of main aquifer systems of the Mahe Island (Seychelles)" in 34th International Geological Congress (IGC), Australia 2012 : Unearthing Our Past and Future - Resourcing Tomorrow, 5-10 August 2012, Brisbane: (2012)
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Information systems for the environment
Damjanović Zvonko, Štrbac Nada, Šerifi Veis, Ranđelović Dragana. "Information systems for the environment" in Proceedings / XIX International Scientific and Professional Meeting Ecological Truth, Eco-Ist '11, 01-04 June 2011, Bor, Serbia, Bor:Tehnical Faculty Bor, University of Belgrade (2011): 276-283
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Condition of support systems in GVH-1A ventillation drift in „Jasenovac“ mine
Crnogorac Luka, Mladenović Marko, Halilović Dževdet. "Condition of support systems in GVH-1A ventillation drift in „Jasenovac“ mine" in 10th Regional Congress of Students of Geotechnical Sciences „GEOREX“, Tuzla:Rudarsko Geološko Građevinski Fakultet (2017): 64-70
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Type I vs. type II excitable systems with delayed coupling
Burić Nikola, Grozdanović Ines, Vasović Nebojša. "Type I vs. type II excitable systems with delayed coupling" in Chaos, Solitons & Fractals 23 no. 4, USA:Chaos, Solitons & Fractals (2005): 1221-1223
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Challenges in using wastewater heat pumps in district heating systems
Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović, Dimitrije Manić (2022)Decarbonization of district heating systems requires ensuring significant amounts of renewable energy available in the proximity of the district heating network. One of the promising solutions is the utilization of purified water from wastewater treatment plants by heat pumps. However, as a heat source, wastewater treatment plants are characterized by annual variability of the flow and temperature of purified water. The consequence is the variability of recoverable heat potential. In this paper, the effect of variability is analyzed for ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović, Dimitrije Manić. "Challenges in using wastewater heat pumps in district heating systems" in 20th International Conference on Thermal Science and Engineering of Serbia, Niš, Serbia, October 18 – 21, 2022, Faculty of Mechanical Engineering in Niš (2022)