Претрага
272 items
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Estimation of the explosive mass based on the surface explosion crater on asphalt
Bjelovuk Ivana, Slobodan Jaramaz, Elek Predrag, Micković Dejan, Kričak Lazar. "Estimation of the explosive mass based on the surface explosion crater on asphalt" in Tehnički vjesnik - Technical Gazette 22 no. 1, Slavonski Brod, Hrvatska:Znanstveno-stručni časopis tehničkih fakulteta Sveučilišta u Osijeku (2015): Prihvaćen. https://doi.org/2203-23-TV-20130928113332
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Study of Dependability Evaluation for Multi-hierarchical Systems Based on Max–Min Composition
Tanasijević Miloš, Ivezić Dejan, Jovančić Predrag, Ćatić Dobrivoje, Zlatanović D.. "Study of Dependability Evaluation for Multi-hierarchical Systems Based on Max–Min Composition" in Quality and Reliability 18 no. 4, Chichester, UK:Jonh Wiley & Sons (2013): 317-326. https://doi.org/DOI: 10.1002/qre.1383
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Dependability assesment of open-pit mines equpment – study on the bases of fuzzy algebra rules
Tanasijević Miloš, Ivezić Dejan, Jovančić Predrag, Ignjatović Dragan, Bugarić Uglješa. "Dependability assesment of open-pit mines equpment – study on the bases of fuzzy algebra rules" in Eksploatacja i Niezawodnosc – Maintenance and Reliability 15 no. 1, Warsaw, Poland:Polish Maintenance Society (2013): 66-74
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Vibration as deciding parameter during revitalization process for replacing the bucket wheel drive
Bošković Saša, Jovančić Predrag, Ignjatović Dragan, Rakićević Branislav, Maneski Taško. "Vibration as deciding parameter during revitalization process for replacing the bucket wheel drive" in Journal of VIBROENGINEERING 17 no. 1, Kaunas, Lithuania:JVE International Ltd. (2015): 24-32
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Poloxamer-based curcumin solid dispersions for ex tempore preparation of supersaturated solutions intended for antimicrobial photodynamic therapy
Vukićević Milica, Bee Hegge Anne, Vulić Predrag, Hjort Tonnesen Hanne. "Poloxamer-based curcumin solid dispersions for ex tempore preparation of supersaturated solutions intended for antimicrobial photodynamic therapy" in Pharmaceutical Development and Technology 7 no. 20, Philadephia, USA:Taylor & Francis (2015): 863-871. https://doi.org/10.3109/10837450.2014.930489
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Traces of drilling predation in the Badenian Mollusks from the Rakovica stream (Belgrade, Serbia)
Ganić Meri, Radović Predrag, Rundić Ljupko, Bradić Katarina, Knežević Slobodan. "Traces of drilling predation in the Badenian Mollusks from the Rakovica stream (Belgrade, Serbia)" in Geologia Croatica 2 no. 62, Zagreb Zagreb:Croatian Geological Survey and the Croatian Geological Society (2016): 205-212. https://doi.org/doi: 10.4154/gc.2016.14
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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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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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Tailoring of K0.8Al0.7Fe0.15Si2.25O6 leucite based dental ceramic material
Kremenović Aleksandar, Fabián Martin, Vulić Predrag, Jovalekić Čedomir, Briančin Jaroslav. "Tailoring of K0.8Al0.7Fe0.15Si2.25O6 leucite based dental ceramic material" in Croatica Chemica Acta 1 no. 89, :Croatian Chemical Society (2016): 101-104. https://doi.org/10.5562/cca2860
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Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics
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 ...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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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 ...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 ...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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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 ...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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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. ...... 2023-10-14 04:30:48 Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] ...
... РГФ] Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja | Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković | Tehnika | 2019 | | 10.5937/tehnika1903369D http://dr.rgf.bg.ac.rs/s/repo/item/0005608 Дигитални ...
... uglja STEVAN P. ĐENADIĆ, Univerzitet u Beogradu, Originalni naučni rad Rudarsko-geološki fakultet, Beograd UDC: 622.271.5 PREDRAG D. JOVANČIĆ, Univerzitet u Beogradu, 621.879.45 Rudarsko-geološki fakultet, Beograd DOI:10.5937/tehnika1903369D DRAGAN M. ...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 ...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 ...... Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers | Dragan Ignjatović, Predrag Jovančić, Stevan ...
... September 2019, Vrdnik, Serbia THE OPTIMIZATION OF AUXILIARY MACHINERY IN OPEN-CAST LIGNITE MINES: A CASE STUDY OF BULLDOZERS Dragan Ignjatović!, Predrag Jovančić!, Stevan Đenadić!, Ivan Janković?, Ivica Ristović! !- University ог Belgrade – Faculty ог Mining and Geology, Belgrade, SERBIA, dragan ...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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Indeksi kontrole održavanja i korišćenja rotornog bagera
Razvoj površinske eksploatacije se u velikom stepenu zasniva na svestranoj mehanizaciji rudarskih radova. Kako bi se zadovoljili potrebni kapaciteti, neophodna je primena savremene mehanizacije, velikih kapaciteta i pouzdanosti u radu. Naime, sa stepenom povećanja mehanizovanosti radova smanjuje se broj zaposlenih radnika, povećava produktivnost rada, smanjuju troškovi po jedinici proizvoda, a samim tim i povećava ekonomičnost površinske eksploatacije. Predmet istraživanja su rotorni bageri SRs 1200 koji predstavljaju samohodne mašine kontinuiranog dejstva namenjene za otkopavanje jalovine i korisne supstance na površinskim ...Jovana Mitrović, Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić. "Indeksi kontrole održavanja i korišćenja rotornog bagera" in XI Međunarodna konferencija "Ugalj i kritični minerali 2023", CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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Development of the hybrid MCDM model for evaluating and selecting bucket wheel excavators for the modernization process
This paper presents a methodology for evaluating and ranking different bucket wheel excavators (BWE) for determining which machine should enter in the process of revitalization and modernization. Various multicriteria methods are used. Combining them achieves the best effect when choosing BVE for the modernization process. AHP, TOPSIS, VIKOR, and PROMETHEE methods are used. The hybrid models are developed from the multi-criteria decision making (MCDM) methods and they are used to evaluate the basic indicators that characterize the operation of ...Snezana Savkovic, Predrag Jovancic, Stevan Djenadic, Milos Tanasijevic, Filip Miletic. "Development of the hybrid MCDM model for evaluating and selecting bucket wheel excavators for the modernization process" in Expert Systems with Applications, Elsevier BV (2022). https://doi.org/10.1016/j.eswa.2022.117199
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Koncept prediktivnog održavanja 4.0 (PdM) u energetici – konekcija sa budućom primenom Industrije 5.0
Četvrtu industrijsku revoluciju - Industrija 4.0 karakteriše upotreba cyber-fizičkih sistema. Da bi se postigla optimalna strategija održavanja (ali i proizvodnje), neophodno je razviti sisteme koji podržavaju napredne inteligentne sisteme održavanja ili tehnologije pametnog održavanja. Iz toga su proizašli postulati Prediktivnog održavanja 4.0 koji definišu veoma blisku budućnost u oblasti održavanja tehničkih sistema. Prediktivno održavanje 4.0 uključuje iskorišćenje snage veštačke inteligencije za stvaranje stalnog uvida u otkrivanje uzroka i anomalija u radu opreme, koje se ne otkrivaju kognitivnim moćima. Drugim ...Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Miloš Tanasijević, Filip Miletić. "Koncept prediktivnog održavanja 4.0 (PdM) u energetici – konekcija sa budućom primenom Industrije 5.0" in Energija, ekonomija, ekologija, Savez energetičara (2022). https://doi.org/ 10.46793/EEE22-2.54J