Претрага
265 items
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Application of stochastic models for mine planning and coal quality control
... represented by a horizontal layer of blocks within the given mining phase and having the same elevation. The mathematical formulation of the scheduling procedure of mining blocs in terms of binary decision variables describing in which period the particular block is extracted and what is its destination (either ...
... represented by a horizontal layer of blocks within the given mining phase and having the same elevation. The mathematical formulation of the scheduling procedure of mining blocs in terms of binary decision variables describing in which period the particular block is extracted and what is its destination (either ...
... Technological scheme of coal homogenization in Kolubara surface mine same length according to the variable number of layers. To illustrate the procedure, the blocks selected corresponded to the first year of production with a total of 4895 blocks. Each block has a grade obtained by Rsim, which, of ...Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković. "Application of stochastic models for mine planning and coal quality control" in Thermal Science, Belgrade : Vinča Institute of Nuclear Sciences (2014). https://doi.org/10.2298/TSCI130201031S
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Environmental Energy Security Indicators as Tools for Environmental Protection
Еколошка прихватљивост је постала незаменљив синтезни показатељ сваке валидне енергетске анализе у последње две-три деценије. Енергетска безбедност је у директној хармонији с еколошком прихватљивошћу кроз многе прописане политичке циљеве, економске користи, правне тековине итд. Индикатори еколошке сигурности представљају један од основних елемената за одређивање енергетске безбедности и снажне алате за усмеравање енергетског сектора ка одрживом развоју. У овом раду, анализа је била концентрисана на показатеље енергетске безбедности у области животне средине који се односе на сектор природног гаса у ...енергетска безбедност, еколошки енергетски индикатори, заштита животне средине, еколошка прихватљивост... Emission of GHG (E1), Emissions of pollutants (E2) and Indirect environmental effects (E3) into ENVIRONMENTAL ACCEPTABILITY (E). A synthetic procedure is accomplished using the appropriate stage composition with a ranked outcome. The synthesis model is presented in optimal form according to the ...
... then classified and fed into the analysis model itself in an adequate form. Such data are entered the synthesis model by the phase proposition procedure, where they are further classified and defined as the input data of the fuzzy set. At the same time, next step called ranking, is done. It can ...Aleksandar Madžarević, Dejan Ivezić, Marija Živković , Miloš Tansijević. "Environmental Energy Security Indicators as Tools for Environmental Protection" in Mining and Environmental Protection-MEP 2019, University of Belgrade, Faculty of Mining and Geology (2019)
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Uticaj geološke neizvesnosti u razvoju rudarskih projekata
Rudarstvo je industrija koja se nosi sa različitim vrstama neizvesnosti i rizika zbog svoje prirode i specifičnosti. Neizvesnost u rudarstvu može poticati iz različitih izvora i uticati na različite aspekte rudarskih projekata. Kao jedan od dominantnih faktora, ističe se geološka neizvesnost. Geološka neizvesnost igra ključnu ulogu u rudarstvu i može značajno uticati na procenu resursa i rezervi, planiranje eksploatacije, ekonomsku isplativost i upravljanje rizicima. Ova neizvesnost se ne može eliminisati, ali se uz primenu adekvatnih standarda i zakona može ...... Mile Bugarin, 2019) (Edwards A.C., 2001). Kriterijumi za klasifikaciju resursa su standardizovani, uzimajući u obzir: način bušenja, ispravnost procedure uzorkovanja i analize proba, rastojanje između istražnih bušotina ı drugih istražnih radova, geološki kontinuitet ležišta, kontinuitet sadržaja, ...
... geološkim modelima koji su produkt verovatne greške u proceni sadržaja matela (pozitivne i negativne). Cilj ovog rada je ukaže na nedostatke tekuće procedure planiranja, i da pokaže da plan optimiziran za jedan zadati set polaznih podataka ncizbežno postaje neizvestan sa promenom neke od usvojenih pr ...Petar Marković, Dejan Stevanović, Mirjana Banković. "Uticaj geološke neizvesnosti u razvoju rudarskih projekata" 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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Some examples of interactions between certain rare earth elements and soil
... been accepted for publication in the Journal of the Serbian Chemical Society but has not yet been subjected to the editing process and publishing procedure applied by the JSCS Editorial Office. Please cite this article as Z. Nikolovski, J. Isailović, D Jeremić, S. Kovač, I. Brčeski, J. Serb. Chem ...
... amounts to 0.23 μg g-1, and the limit of quantification (LOQ) 0.77 μg g-1, whereas LOD for Nd amounts to 0.52 μg g-1, and LOQ 1.74 μg g-1.17,18 Procedure for determining Freundlich adsorption isotherm Approximately 5 g of soil was measured and 50 mL of metallic ion solution added. The pH of the ...Zlatko Nikolovski, Jelena Isailović, Dejan Jeremić, Sabina Kovač, Ilija Brčeski. "Some examples of interactions between certain rare earth elements and soil" in Journal of the Serbian Chemical Society, National Library of Serbia (2021). https://doi.org/10.2298/JSC211006095N
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Optimizacija utovarno-transportnih sistema u funkciji planiranja površinskog kopa
Mirjana V. Banković (2018-07-13)Profitabilna eksploatacija sve složenijih ležišta je težak zadatak koji zavisi odtemeljnog procesa analize, planiranja i projektovanja rudnika. Izvodljiv strateškiplan mora da zadovoljava društvena, regulatorna, tehnološka, geometrijska iekonomska ograničenja. Kako bi se postigao osnovni cilj, odnosno profitabilnost iodrživost rudarskog projekta na duži period, neophodno je unapređenjematematičkih modela i informatičke podrške procesima planiranja i optimizacijekoji će omogućiti efikasnu realizaciju ovih ciljeva...tehnološki model, integralni model, planiranje, optimizacija,utovarno-transportni sistem, neto sadašnja vrednost projekta... značajnih istraživanja i razvoja u poslednjih trideset godina, a novi trend razvoja istraživanja se nastavlja u praksi. Optimizacioni algoritmi, procedure i softver, koji su razvijani poslednjih četrdeset i više godina, omogućili su inženjerima rudarske struke da izrađuju kvalitetne i u realnim uslovima ...
... obrađen je sistemski pristup modeliranja procesa, i definisani modeli za dugoročno, srednjeročno, kratkoročno i operativno planiranje sa opisom procedura za postizanje strateških ciljeva poslovanja. I na kraju je prezentiran integralni model za optimizaciju planiranja sistema eksploatacije. Peto poglavlje ...
... istraživanja i razvoja u poslednjih trideset godina, a novi trend razvoja istraživanja se nastavlja u praksi. Uprkos prednostima dostupnih algoritama, procedura i softvera za planiranje površinskih kopova, uloga čoveka kao planera je i dalje neprikosnovena. Posebno je važno da planer (rudarski inženjer) ima ...Mirjana V. Banković. "Optimizacija utovarno-transportnih sistema u funkciji planiranja površinskog kopa" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-07-13)
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Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit
Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina. "Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia , Belgrade : University of Belgrade-Faculty of mining and geology (2023)
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A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor
Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić. "A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor" in Transportation Planning and Technology, Informa UK Limited (2023). https://doi.org/10.1080/03081060.2023.2245389
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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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Просторни положај лежишта угља Ђурђевик: геофизичко-геолошки модел
Синиша Арсеновић (2019)Лежиште угља Ђурђевик представља источни део Бановићког угљеног басена и припада северној страни босанске офиолитске зоне унутрашњих Динарида у чији састав улазе стене палеозојске, мезозојске и кенозојске старости. Језерска доњомиоценска угљоносна серија изграђена је од лапоровито-глиновитих седимената са једним слојем мрког угља. Дебљина угљеног слоја креће се у интервалу од 5 до 25 m са генералним правцем пружања СЗ - ЈИ и падом према ЈЗ. У зони обухваћеноj геофизичким истраживањима изражена je пострудна тектоника у виду раседа мањег и ...... задате средине. а. образац у коме се врши одабир процедуре моделирања, корака извора и постављају се иницијалне поставке снимљеног фајлла, б. подешавање типа таласића и фреквентног опсега, в. синтеза поставки, преглед пред покретање процедуре моделирања Последњи прозор (Слика 3.10 в) односи ...
... дефинисане циљеве. Дефинисање параметара на основу којих је извршена аквизција одвијало се у три корака. Први корак је подразумевао одабир процедуре моделовања (Слика 3.10 а), који може бити: - 2D вертикални дубински захват (2D vertical incidence) – користи се при симулацији вертикалног ...
... временском домену, што је изведено извозом модела брзина из директно задатог модела креираног на геолошкој подлози. Након извоза, модел је учитан у процедуру миграције (Табела 3.3) и на основу дефинисаног оператора (са границама 0 s – 0 m – 0 m; 0,6 s – 250 m – 250 m за позицију Х = 250 m) дефинисани ...Синиша Арсеновић. Просторни положај лежишта угља Ђурђевик: геофизичко-геолошки модел, Београд : Рударско-геолошки факултет, 2019
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Ontološki model upravljanja rizikom u rudarstvu
Olivera Kitanović (2021)Rudarska proizvodnja obuhvata kompleksne tehnološke sisteme, što nameće potrebu za uspostavljanjem i unapređivanjem sistema upravljanja rizikom. Heterogenost i obim podataka neophodnih za upravljanje rizikom zahtevaju sistem koji ih na fleksibilan način integriše i omogućava njihovo optimalno korišćenje. Osnovni cilj ove disertacije je razvoj ontologije za domen rudarstva i na njoj zasnovanog modela za upravljanje rizikom. Njegova realizacija podrazumeva i implementaciju algoritama ekstrakcije informacija za popunjavanje ontologije, kao i odgovarajuće softversko rešenje. Razvoj modela obuhvata i značajno proširenje rudarskog korpusa, kao ...rudarstvo, rizik, upravljanje rizikom, procena rizika, ontologija, semantička mreža, ekstrakcija informacija, upravljanje znanjem, računarska lingvistika... okruženje/upravljački. Za svaki opisan događaj navedeni su rizici koje oni nose i predložene mere za uklanjanje i kontrolu u vidu inženjeringa, administrativne, lične zaštitne opreme ili ponašanja zaposlenih. Opsežna lista data u ovom radu ograničena je samo na opasnosti po bezbednost, pa autori preporučuju ...
... traje i danas. Ovaj korpus sadrži književne i umetničke tekstove pisaca 20. i 21. veka, naučne tekstove iz oblasti društvenih i prirodnih nauka, administrativne tekstove i tekstove iz dnevnih novina, časopisa i magazina počevši od 1991. godine. Manji deo korpusa čine prevodi književnih, umetničkih i novinskih ...
... modeliranih slučajeva rizika i njihovih karakteristika, bazirano na semantičkim relacijama koje proizilaze iz ontološkog modela nakon procedure rasuđivanja (eng. reasoning procedure). IRIS pruža novi okvir za konzistentnu procenu i harmonizovanu kvantifikaciju rizika. Angelides i ostali (2013) uspostavljaju ...Olivera Kitanović. Ontološki model upravljanja rizikom u rudarstvu, Beograd : [O. Kitanović], 2021
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2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem
... and compared with the geotechnical profile (Figure 8). This procedure was done with partial overlap of the previously scanned parts. Detail loss is greatly expressed in comparison with individually scanned parts, but with this procedure the whole spectrum of lateral resistivity changes can be observed ...Branislav Sretenović, Filip Arnaut, Ivana Vasiljević, Vesna Cvetkov. "2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem" in Podzemni radovi, Centre for Evaluation in Education and Science (CEON/CEES) (2019). https://doi.org/10.5937/PodRad1934059S
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Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)
Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD... Drenjak deposit were cut, formatted, and mounted in epoxy resin. The surface was ground with emery papers according, to the standard petrographical procedure [17] and pre-analysed with a polarising reflected-light microscope and SEM to identify the micro-location for TEM analysis. In the suitable grains ...
... the TEM sample preparation over the site-specific ocused ion beam (FIB) method to avoid possible Ga implantation during, the sample preparation procedure. The electron-transparent samples were mounted in a low-background dual tilt Be holder and analysed in the transmission electron microscope (TEM ...Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik. "Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)" in Crystals, MDPI AG (2023). https://doi.org/10.3390/cryst13020278
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Integrative GHG Assessment in Oil and Gas Industry
Reducing greenhouse gas emissions is one of the main targets of national strategies in European countries. As a main contributor to emissions, the energy sector is recognized as the most promising to apply measures and actions aimed to decrease GHG emissions. The Oil and Gas industry as a significant contributor to global greenhouse gas emissions is facing a growing need for estimating, mitigating, and reducing the impact of their operations on the atmosphere to stay competitive in a newly ...... hcaters, furnaces, kilns, ovens, flares, thermal oxidizers, dryers, and any other equipment or machinery that combusts any fucl. The selected procedure for determining amounts of emitted GHG depends on available input data. Depending on the availability of data, thcir consistency, and time serics ...
... transport activity. The source description shows thc diversity of mobile sources and the range of characteristics that affect emission factors. Procedure applied for nonstationary combustion is the same as thc onc for stationary processes undcr ticr I approach but with introduction of default cmission ...Aleksandar Mirković, Marija Živković, Stevan Đenadić, Darja Lubarda, Chinedu Anyanwa. "Integrative GHG Assessment in Oil and Gas Industry" in Energija, ekonomija, ekologija (2023). https://doi.org/10.46793/EEE23-1.51M
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Mikroelementi u uljnim šejlovima Aleksinca i njihov uticaj na životnu sredinu
Nikoleta Aleksić (2021)... strane Feliu-a i saradnika [5] sa određenim izmenama u proceduri sinteze, uz dodatak aditiva HCl u vodenu fazu mikroemulzije. Sastav vodene faze, odnosno sadržaj aditiva, je variran kako bi se proizvele promene u obliku nanočestica. Istom procedurom sintetizovani su i bimetalni PtAu/C nanokatalizatori ...
... optimalnom sadržaju aditiva, u slučaju Pt/C katalizatora, kao i uspešnost sinteze bimetalnih PtAu/C katalizatora, po prvi put u literaturi korišćenom procedurom. [6] Pt/C katalizatori – nanočestice kontrolisanog oblika Fizičko-hemijska karakterizacija potvrdila je uspešnost sinteze Pt/C katalizatora sa ...
... sar. [7]. Suncokretovo ulje i uljani ekstrakt sporednog proizvoda šargarepe podvrgnuti su transesterifikaciji u prisustvu bor(III)-fluorida, prema procedure opisanoj od strane Karlović i Andrić [8]. Gasno-hromatografska analiza (GC) je izvršena na uređaju Agilent 7890A sa plameno jonizujućim detektorom ...Nikoleta Aleksić. "Mikroelementi u uljnim šejlovima Aleksinca i njihov uticaj na životnu sredinu" in VIII Memorijalni naučni skup iz zaštite životne sredine „Docent dr Milena Dalmacija“, 2021, Prirodno-matematički fakultet, Novi Sad (2021)
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Coupling of artificial intelligence methods in the development of hybrid intelligent systems
In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije... Airpollution - Topology Monitoring Fig. 3 Structure of a hybrid system for analysis of area air pollution load Basically, the estimation procedure uses NN prediction capabilities. However, it has been noted that in certain cases the NN classically trained through back propagation (BP) tends ...Ranka Stanković, Ivan Obradović, Nikola Lilić. "Coupling of artificial intelligence methods in the development of hybrid intelligent systems" in X Kongres Matematičara, Matematički fakultet, Beograd (2001)
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Fuzzy expert analysis of the severity of mining machinery failure
Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy expert analysis of the severity of mining machinery failure" in Applied Soft Computing, Elsevier BV (2020). https://doi.org/10.1016/j.asoc.2020.106459
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Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm
Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering... SEA. In fact, the SEA procedure is car- ried out at the strategic level of planning, or in the initial phase of project development (which is the case for wind farms) when there is usually no exact data that is necessary for quantitative methods, which is why the procedure usually focuses on qualitative ...
... Assess. 2016, 18, 48–58. Energies 2021, 14, 6174 14 of 15 21. Gallo, P.; Fredianelli, L.; Palazzuoli, D.; Licitra, G.; Fidecaro, F. A procedure for the assessment of wind turbine noise. Appl. Acoust. 2016, 114, 213–217. 22. Lenchine, V. Assessment of amplitude modulation in environmental ...Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić. "Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm" in Energies, MDPI AG (2021). https://doi.org/10.3390/en14196174
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Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species
Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić (2019)Herein we report effects of partial substitution of Fe3+ by Y3+ in magnetite (Fe3O4) on morphology and inorganic arsenic species adsorption efficiency of the Fe3−xYxO4 nanoparticles formed. The series of Fe3−xYxO4 (x=0.00, 0.042 and 0.084, labeled as Y00, Y05 and Y10, respectively) was synthesized using co-precipitation followed by microwave-hydrothermal treatment (MW) at 200°C. With increase of yttrium content(xvalue), both the morphological inhomogeneity of the samples and the fraction of spinel nanorods as compared to spinel pseudospherical particles increased. By ...Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić. "Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species" in Nanotechnology, IOP Publishing (2019). https://doi.org/10.1088/1361-6528/ab3ca2
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Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia
The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...Jelka Krušić , Biljana Abolmasov, Miloš Marjanović. "Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia" in Understanding and Reducing Landslide Disaster Risk. WLF 2020. ICL Contribution to Landslide Disaster Risk Reduction, Springer, Cham (2021). https://doi.org/10.1007/978-3-030-60706-7_25
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Пројекат ПРИЗМА: Карактеризација и технолошки поступци за рециклажу и поновну употребу флотацијске јаловине рудника „Рудник“
Владимир Симић, Стефан Петровић, Филип Арнаут, Весна Цветков, Милена Костовић, Драган Радуловић, Јовица Стојановић, Владимир Јовановић, Дејан Тодоровић, Нина Николић, Јелена Сенћански, Грозданка Богдановић, Драгана Мариловић (2024)Владимир Симић, Стефан Петровић, Филип Арнаут, Весна Цветков, Милена Костовић, Драган Радуловић, Јовица Стојановић, Владимир Јовановић, Дејан Тодоровић, Нина Николић, Јелена Сенћански, Грозданка Богдановић, Драгана Мариловић. "Пројекат ПРИЗМА: Карактеризација и технолошки поступци за рециклажу и поновну употребу флотацијске јаловине рудника „Рудник“" in Записници Српског геолошког друштва, Београд : Српско геолошко друштво (2024)