Претрага
282 items
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Tailoring of Multifunctional KAlSiO4 - KAlSi2O6 Based Ceramic Materials
Antić Bratislav, Bošković Marko, Vulić Predrag, Spasojević Vojislav, Kremenović Aleksandar. "Tailoring of Multifunctional KAlSiO4 - KAlSi2O6 Based Ceramic Materials" in YUCOMAT 2012 : Programme and the book of abstracts / Fourteenth Annual Conference, Herceg Novi, September 3-7, 2012, Belgrade:Materials Research Society of Serbia (2012): 54-54
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Investigation on vanadate flux grown single crystals in K1-x(Na,Li)xAlSiO4 system
Vulić Predrag, Lazić Biljana, Krüger Hannes, Kremenović Aleksandar, Antić Bratislav.. "Investigation on vanadate flux grown single crystals in K1-x(Na,Li)xAlSiO4 system" in XIX Conference of the Serbian Crystallographic Society-Abstracts, Plenary Lectures, Bela Crkva, Srbija:Srpsko kristalografsko društvo (2012): 14-15
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Traces of drilling predation in the Upper Badenian (Middle Miocene) molluscs from the Rakovica stream (Belgrade)
Ganić Meri, Radović Predrag, Rundić Ljupko, Bradić Katarina, Knežević Slobodan. "Traces of drilling predation in the Upper Badenian (Middle Miocene) molluscs from the Rakovica stream (Belgrade)" in Geologia Croatica 2 no. 69, Zagreb, Croatia:Croatian Geological Institute (2016): 205-212
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Neki aspekti proizvodnje i korišćenja komprimovanog prirodnog gasa
Ivezić Dejan, Živković Marija, Madžarević Aleksandar, Jovančić Predrag, Danilović Dušan. "Neki aspekti proizvodnje i korišćenja komprimovanog prirodnog gasa" in Енергија, економија, екологија XVIII no. 01-Feb, :Савез енергетичара (2016): 42-48
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Proizvodnja električne energije iz elektrana na ugalј i prateća emisija CO2: komparacija EU-27 i Srbije
Velike elektrane su i u trećoj deceniji 21. veka i dalјe odgovorne za više od polovine proizvodnje električne energije u Evropi. U svom radu pretežno koriste fosilna goriva, što rezultira emisijom zagađujućih materija u vazduh. Stoga, zahvalјujući direktivama EU, kao i poremećajima na tržištu, emisije uglјen-dioksida iz velikih postrojenja za sagorevanje u EU-27 intenzivno se smanjuju u poslednje dve decenije. Iako je upotreba uglјa, posebno u zemlјama Evropske unije, u stalnom padu, ima prostora za dodatno smanjenje. Autori su ...Aleksandar Madžarević, Predrag Jovančić, Stevan Đenadić, Filip Miletić, Miroslav Crnogorac. "Proizvodnja električne energije iz elektrana na ugalј i prateća emisija CO2: komparacija EU-27 i Srbije" in Energija, ekonomija, ekologija (2023). https://doi.org/10.46793/EEE23-2.44M
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Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja
Hidraulični bageri primenjuju se u različitim oblastima privrede a najzastupljeniji su u građevinarstvu i rudarstvu. Na površinskim kopovima sa kontinualnim sistemima, klasifikuju kao pomoćna mehanizacija a na površinskim kopovima sa diskontinualnim sistemima, kao osnovna mehanizacija. Kako je u oba slučaja njihova primena neizostavna, važno je izvršiti adekvatnu analizu postojećih podataka, u cilju optimizacije izbora tipa hidrauličnog bagera u odnosu na uslove rada datog površinskog kopa. U radu su opisane različite višekriterijumske metode koje su korišćene za analizu hidrauličnih bagera. ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković. "Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2019). https://doi.org/10.5937/tehnika1903369D
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Industrija 4.0 - koncept prediktivnog održavanja 4.0 (PdM 4.0) u rudarstvu
Četvrtu industrijsku revoluciju – Industriju 4.0 karakteriše upotreba cyber-fizičkih sistema. Da bi se postigla optimalna strategija održavanja (ali i eksploatacije), neophodno je razviti sisteme koji podržavaju napredne inteligentne sisteme održavanja ili tehnologije pametnog održavanja. Iz toga su proizašli postulati Prediktivnog održavanja 4.0 (PdM 4.0) koji definišu veoma blisku budućnost u oblasti održavanja tehničkih sistema pa i rudarske opreme. PdM 4.0 uključuje iskorišćenje snage veštačke inteligencije za stvaranje stalnog uvida u otkrivanje uzroka i anomalija u radu opreme, koje se ...... 4.0) u rudarstvu Predrag Jovančić, Vesna Damnjanović, Dragan Ignjatović, Miloš Tanasijević, Stevan Đenadić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Industrija 4.0 - koncept prediktivnog održavanja 4.0 (PdM 4.0) u rudarstvu | Predrag Jovančić, Vesna ...
... unpredictable. Key words: mining, predictive maintenance PdM 4.0, Industry 4.0 1 Prof. Dr Predrag Jovančić, Univerzitet u Beogradu, Rudarsko-geološki fakultet 2 Prof. Dr Vesna Damnjanović, Univerzitet u Beogradu, Rudarsko-geološki fakultet 3 Prof ...Predrag Jovančić, Vesna Damnjanović, Dragan Ignjatović, Miloš Tanasijević, Stevan Đenadić. "Industrija 4.0 - koncept prediktivnog održavanja 4.0 (PdM 4.0) u rudarstvu" in IX Međunarodna konferencija UGALJ 2019, Zlatibor, Srbija, 23-26. oktobar 2019., Jugoslovenski komitet za površinsku eksploataciju (2019)
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The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers
One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović. "The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers" in 7th International Symposium Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2019)
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Effectiveness Analysis of Different Bucket-wheel Excavators
Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...... Excavators Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Effectiveness Analysis of Different Bucket-wheel Excavators | Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović ...
... PROTECTION 22 – 25th September 2021, Serbia EFFECTIVENESS ANALYSIS OF DIFFERENT BUCKET-WHEEL EXCAVATORS Stevan Djenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić University of Belgrade – Faculty of Mining and Geology, SERBIA, stevan.djenadic@rgf ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić. "Effectiveness Analysis of Different Bucket-wheel Excavators" in 8th International Conference Mining and Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
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Testing the energy value of different types of coal by the method of active thermography
In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...... Damnjanović, Predrag Jovančić, Dragutin Jovković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Testing the energy value of different types of coal by the method of active thermography | Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin ...
... Institute, Belgrade, ljubisa.tomic@gmail.com VESNA DAMNJANOVIĆ Faculty of Mining and geology, University of Belgrade, vesna.damnjanovic@rgf.bg.ac.rs PREDRAG JOVANČIĆ Faculty of Mining and geology, University of Belgrade, predrag.jovancic@rgf.bg.ac.rs DRAGUTIN JOVKOVIĆ Faculty of Mining and geology, ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Testing the energy value of different types of coal by the method of active thermography" in 9th International Scientific Conference on Defensive Technologies, Belgrade, Serbia, 15-16 October 2020, The Military Technical Institute (2020)
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Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine
Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić (2021)The production of lignite in large open-pit mines is mainly performed with continuously operating equipment, where bucket-wheel excavators, bucket-chain excavators, belt conveyors, and spreaders are the basic machines. Smaller machines, usually of discontinuous operating nature, are commonly categorized as auxiliary machines. This paper presents the research related to the analysis of auxiliary machine parameters with the case study for a hydraulic excavator. The purpose of the analysis was to develop a model of rating quality of service of the ...... Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Application of the Fuzzy Model in the Evaluation ...
... Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine | Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić | SSRN Electronic Journal | 2021 | | 10.2139/ssrn.3945617 http://dr.rgf.bg.ac.rs/s/repo/item/0005584 Дигитални репозиторијум Рударско-геолошког ...
... Selection of Hydraulic Excavators on Open-pit Lignite Mine Stevan Djenadica,*, Milos Tanasijevica, Vladimir Milisavljevica, Dragan Ignjatovica, Predrag Jovancica a Univesity of Belgrade, Faculty of Mining and Geology, Djusina 7, Belgrade 11000, Serbia * Corresponding author. Tel.: +381-11-3219-195 ...Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić. "Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945617
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Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics
... ceramics Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics | Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar ...
... Repository is available at: www.dr.rgf.bg.ac.rs Article Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics Maja Milošević1* , Predrag Dabić1, Sabina Kovač1, Lazar Kaluđerović2 and Mihovil Logar1 1University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia and 2University ...Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar. "Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics" in Clay Minerals, Mineralogical Society (2019). https://doi.org/10.1180/clm.2019.49
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A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers
Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...... Effectiveness A FUZZY-BASED DECISION SUPPORT MODEL FOR EFFECTIVENESS EVALUATION – A CASE STUDY OF THE EXAMINATION OF BULLDOZERS Milos Tanasijevic1,*, Predrag Jovancic1, Dejan Ivezic1, Ugljesa Bugaric2 and Radisa Djuric3 1University of Belgrade, Faculty of Mining and Geology Belgrade, Serbia *Corresponding ...Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić. "A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers" in International Journal of Industrial Engineering: Theory, Applications and Practice (2019)
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Chalcopyrite Floatability in Flotation Plant of the Rudnik Mine
У раду је приказан део резултата обимних индустријских испитивања утицаја финоће млевења руде на резултате флотације минерала олова, бакра и цинка из руде рудника "Рудник". На основу резултата индустријских испитивања, констатовано је да се при једностепеном млевењу и двостепеном класирању комплексне Pb-Zn-Cu руде, појављује проблем тзв. диференцијалне мељивости. Наиме, галенит као мек минерал знатно брже се уситњава од осталих минерала у руди. Ово доводи до тога да минерал галенит прелази у ситне класе које споро флотају, а у ...... Flotation Plant of the Rudnik Mine Predrag Lazić, Đurica Nikšić, Rudolf Tomanec, Dušica Vučinić, Lidija Cvetićanin Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Chalcopyrite Floatability in Flotation Plant of the Rudnik Mine | Predrag Lazić, Đurica Nikšić, Rudolf ...Predrag Lazić, Đurica Nikšić, Rudolf Tomanec, Dušica Vučinić, Lidija Cvetićanin. "Chalcopyrite Floatability in Flotation Plant of the Rudnik Mine" in Journal of Mining Science, Pleiades Publishing Ltd (2020). https://doi.org/10.1134/S1062739120016552
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Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)
Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić. "Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)" in Geologia Croatica (2019). https://doi.org/10.4154/gc.2019.11
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Numerical and experimental diagnostic of dynamic behavior of the rotor-excavator construction
Maneski Taško, Jovančić Predrag, Ignjatović Dragan, Milošević Mitić Vesna, Trišović Nataša. "Numerical and experimental diagnostic of dynamic behavior of the rotor-excavator construction" in Third Serbian (28th Yu) Congress on Theoretical and Applied Mechanics 1, Vlasina Lake:Serbian society of mechanics (2011): 629-636
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Хлоритска геотермометрија на примеру хидротермално алтерисаних вулканита Рудника (Србија)
Ерић Сузана, Срећковић-Батоћанин Даница, Матовић Весна, Здравковић Алена, Вулић Предраг. "Хлоритска геотермометрија на примеру хидротермално алтерисаних вулканита Рудника (Србија)" in Српски геолошки конгрес, Врњачка Бања, 17‐20. мај 2019 no. 1, Врњачка Бања:Српско геолошко друштво (2018): 48-51
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Condition and behaviour diagnostics of drive groups on belt conveyors
Maneski Taško, Jovančić Predrag, Ignjatović Dragan, Milošević Mitić Vesna, Maneski Miloš. "Condition and behaviour diagnostics of drive groups on belt conveyors" in Journal of Engineering Failure Analysis 22, :Elsevier (2012): 28-37. https://doi.org/DOI: 10.1016/j.engfailanal.201
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Diagnostics of Bucket Wheel Excavator Discharge Boom Dynamic Performance and Its Reconstruction
Brkić Aleksandar, Maneski Taško, Ignjatović Dragan, Jovančić Predrag, Spasojević Brkić Vesna. "Diagnostics of Bucket Wheel Excavator Discharge Boom Dynamic Performance and Its Reconstruction" in Journal of Maintenance and Reliability 16 no. 2, :Polish Maintenance Society (2014): 188-197
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Hloritska geotermometrija na primeru hidrotermalno alterisanih vulkanita rudnika (Srbija),
Erić Suzana, Srećković-Batoćanin Danica, Matović Vesna, Zdravković Alena, Vulić Predrag,. "Hloritska geotermometrija na primeru hidrotermalno alterisanih vulkanita rudnika (Srbija)," in 17. Kongres geologa Srbije: Zbornik apstrakata (Nacionalni kongres s međunarodnim učešćem), 17-20. Maj, Vrnjačka Banja 1, Beograd:Srpsko geološko društvo (2018): 48-51