2363 items

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  Application of machine learning for diagnosing the operation of a deep well pump in oil production cite

  Maja Trikić (2024)

  This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.

  deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost

  Maja Trikić. Application of machine learning for diagnosing the operation of a deep well pump in oil production, 2024

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  Middle to Late Jurassic pelagites and gravity mass flow deposits of a displaced Neotethyan margin: Microfacies and biostratigraphical studies in Northeast Hungary cite

  János Haas, László Fodor, Nevenka Đeric, Ottilia Szives, Péter Ozsvárt, Melinda Fialowski, Szilvia Kövér (2024)

  mikrofacije, sedimentacija, srednja jura, gornja jura, biostratigrafija, Neotetis

  János Haas, László Fodor, Nevenka Đeric, Ottilia Szives, Péter Ozsvárt, Melinda Fialowski, Szilvia Kövér. "Middle to Late Jurassic pelagites and gravity mass flow deposits of a displaced Neotethyan margin: Microfacies and biostratigraphical studies in Northeast Hungary" in Geološki anali Balkanskoga poluostrva, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet (2024). https://doi.org/10.2298/GABP241010014H М24

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  Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia cite

  Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)

  Stratigraphy,Economic Geology,Geology,Geophysics,Oceanography

  Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević. "Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia" in Marine and Petroleum Geology, Elsevier BV (2020). https://doi.org/10.1016/j.marpetgeo.2020.104252 М21

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  Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names cite

  Branislava Šandrih, Cvetana Krstev, Ranka Stanković (2019)

  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 ...

  NER, Named Entity Recognition Systems, Serbian, Personal Names

  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 М33

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  Filter rules for soil and geosynthetics cite

  Dragoslav Rakic, Irena Basaric Ikodinovic, Milenko Ljubojev (2021)

  Štetni efekti izazvani strujanjem vode kroz različite građevine (brane, nasipi i sl.) uspešno se rešavaju ugradnjom različitih filterskih slojeva. Osnovne funkcije filterskih slojeva su brza evakuacija vode uz sprečavanje unutrašnje erozije i iznošenje sitnih čestica tla. Ovi filterski slojevi najčešće se grade od krupnozrnih materijala (pesak, šljunak, kameni agregati), ali se pored prirodnih materijala sve više koriste i veštački geosintetički materijali. U radu su prikazana osnovna filtarska pravila koja treba ispoštovati da bi se izvelo uspešno projektovanje različitih filtracionih ...

  filter, baza, granulometrijski sastav, vodopropustljivosti, stabilnosti, začepljenje, izdržljivost

  Dragoslav Rakic, Irena Basaric Ikodinovic, Milenko Ljubojev. "Filter rules for soil and geosynthetics" in Mining and Metallurgy Engineering Bor, Mining and Metallurgy Institute Bor (2021). https://doi.org/10.5937/mmeb2101001R М51

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  Economy and geological economical evaluation of phosphate deposit in Iraq Republick cite

  Falah Jaber (1968)

  Geological, economical evaluation, phosphate, Iraq

  Falah Jaber. Economy and geological economical evaluation of phosphate deposit in Iraq Republick, Beograd:Rudarsko-geološki fakultet, 1968

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  Concepts for Improving Machine Learning Based Landslide Assessment cite

  Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)

  Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija

  Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić. "Concepts for Improving Machine Learning Based Landslide Assessment" in Natural Hazards GIS-based Spatial Modeling Using Data Mining Techniques, Advances in Natural and Technological Hazards Research, volume 48, Springer Nature Switzerland AG 2019 (2019). https://doi.org/10.1007/978-3-319-73383-8_2 М14

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  Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia cite

  Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić (2019)

  We have developed a technique to calculate lateral density distribution of the sedimentary basin basement by combining linear gravity–density inversion and 2D forward modeling. The procedure requires gravity anomaly data, depth-to-basement data and density data for the sediments (density–depth distribution). Gravity efect of density variations in the basement was extracted from the total gravity anomaly by removing the joint efect of the sediments with vertical density variations and homogeneous basement of average density contrast (calculated by 2D modeling). Gravity ...

  funkcije raspodele gustine, lateralna raspodela gustine, karta gustine podloge

  Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić. "Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia" in Acta Geophysica, Springer (2019). https://doi.org/10.1007/s11600-019-00328-9 М23

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  Hydrodynamic analysis of radial collector well ageing at Belgrade well field cite

  Đorđije Božović, Dušan Polomčić, Dragoljub Bajić, Jelena Ratković (2019)

  The origin and effect of hydraulic resistances on the rate of ageing of radial collector wells are identified through numerical hydrodynamic analysis. The research includes hydrodynamic modeling of one such well with new laterals at Belgrade well field. The performance of the laterals is aggravated by rapid ageing. The change in the hydraulic parameters of the laterals during the first decade of operation is analyzed through simulations of the groundwater regime with realistically specified geometries and hydraulics of the ...

  Colmation, Incrustation, Groundwater modeling, MODFLOW–USG, Connected Linear Network Process

  Đorđije Božović, Dušan Polomčić, Dragoljub Bajić, Jelena Ratković. "Hydrodynamic analysis of radial collector well ageing at Belgrade well field" in Journal of Hydrology, Elsevier BV (2019). https://doi.org/10.1016/j.jhydrol.2019.124463 М21а

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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) cite

  Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić (2019)

  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. ...

  мио-плиоценска геодинамика, јужни Панонски басен, Авалски и Торлак хорст, Белопоточки трог, Србија

  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 М22

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  Mikroelementi u kvartarnim sedimentima i lignitu Kostolačko-kovinskog ugljonosnog basena, istočna Srbija – odabrani primeri cite

  Bogoljub Vučković, Biljana Radovanović, Dragana Životić (2022)

  Sadržaj, distribucija i način pojavljivanja elemenata u tragovima (mikroelemenata), posebno potencijalno toksičnih i radioaktivnih elemenata u uglju, su od velikog značaja, posebno ako se koriste kao gorivo u termoelektranama (TE). Na osnovu sistematski prikupljenih podataka o elementima u tragovima u uglju, zemljištu i sedimentima, moguće je utvrditi stepen zagađenosti vazduha, zemljišta, vode, kao i negativan uticaj na zdravlje ljudi. Eksploatacija i istraživanje lignita u Kostolcu i Kovinu traje više od jednog veka, dok se sagorevanje lignita sa površinskih kopa ...

  mikroelementi, sedimenti, lignit, Kostolac

  Bogoljub Vučković, Biljana Radovanović, Dragana Životić. "Mikroelementi u kvartarnim sedimentima i lignitu Kostolačko-kovinskog ugljonosnog basena, istočna Srbija – odabrani primeri" in 18. Kongres geologa Srbije "Geologija rešava probleme", Divčibare, 01-04 jun 2022., Srpsko geološko društvo (2022) М64

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  Landslide Umka-the first automated monitoring project in Serbia cite

  Abolmasov Biljana, Milenković Svetozar, Jelisavac Branko, Vujanic Vladeta (2012)

  Abolmasov Biljana, Milenković Svetozar, Jelisavac Branko, Vujanic Vladeta. "Landslide Umka-the first automated monitoring project in Serbia" in 2nd Project workshop-Monitoring and analysis for disaster mitigation of landslides, debris flow and floods, Book of Abstracts 1 no. 1, Rijeka, Croatia:University of Rijeka and JICA (2012): 77-80 M33

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  Postorogenic interplay of tectonic and magmatic processes in the Kopaonik Mts. area. cite

  Mladenović Ana, Trivić Branislav, Cvetković Vladica (2015)

  Mladenović Ana, Trivić Branislav, Cvetković Vladica. "Postorogenic interplay of tectonic and magmatic processes in the Kopaonik Mts. area." in Scientific workshop “Geology of the Dinarides and adjacent orogens – Remaining Conundrum”, 27–28. June 2015, Svilajnac, Serbia (2015) M31

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  Dynamic behavior and stress field of excavator SchRs740 extended boom cite

  Petrović Branko, Petrović Ana, Ignjatović Dragan, Grozdanović Ines (2015)

  Petrović Branko, Petrović Ana, Ignjatović Dragan, Grozdanović Ines. "Dynamic behavior and stress field of excavator SchRs740 extended boom" in 7th International Scientific and Expert Conference of the International TEAM Societ, Beograd: (2015): 345-348 M33

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  Rujevac Sb-Pb-Zn-As polymetallic deposit, Boranja orefield, Western Serbia: Native arsenic and arsenic mineralization cite

  Radosavljević Slobodan, Stojanović Jovica, Radosavljević Mihajlović Ana,Vuković Nikola (2014)

  Radosavljević Slobodan, Stojanović Jovica, Radosavljević Mihajlović Ana,Vuković Nikola. "Rujevac Sb-Pb-Zn-As polymetallic deposit, Boranja orefield, Western Serbia: Native arsenic and arsenic mineralization" in Mineralogy and Petrology 108 no. 1, :Springer Vienna (2014): 111-122 M22

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  Experimental investigation on emission and stability of dual feed biogas swirl combustor cite

  Živković Marija, Milivojević Aleksandar, Adžić Miroljub (2016)

  Živković Marija, Milivojević Aleksandar, Adžić Miroljub. "Experimental investigation on emission and stability of dual feed biogas swirl combustor" in Journal of Renewable and Sustainable Energy 2 no. 6, Melville, NY 11747-4300, USA:AIP Publishing (2016): 55-66. https://doi.org/http://doi.org/10.1063/1.49455 M23

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  The Geology based Metaphor and its inverse form cite

  Лидија Беко, Марија Ђорђевић (2023)

  метафора, обрнута метафора, геологија, L2 вокабулар

  Лидија Беко, Марија Ђорђевић. "The Geology based Metaphor and its inverse form" in FACTA UNIVERSITATIS: LINGUISTICS AND LITERATURE (2023). https://doi.org/10.22190/FULL230227001B М51

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  Ontološki model upravljanja rizikom u rudarstvu cite

  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

  Olivera Kitanović. Ontološki model upravljanja rizikom u rudarstvu, Beograd : [O. Kitanović], 2021 M70

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  A Twitter Corpus and Lexicon for Abusive Speech Detection in Serbian cite

  Danka Jokić, Ranka Stanković, Cvetana Krstev, Branislava Šandrih (2021)

  Uvredljivi govor na društvenim medijima, uključujući psovke, pogrdni govor i govor mržnje, dostigao je nivo pandemije. Sistem koji bi bio u stanju da detektuje takve tekstove mogao bi da pomogne da internet i društveni mediji postanu bolji virtuelni prostor sa više poštovanja. Istraživanja i komercijalna primena u ovoj oblasti do sada su bili fokusirani uglavnom na engleski jezik. Ovaj rad predstavlja rad na izgradnji AbCoSER-a, prvog korpusa uvredljivog govora na srpskom jeziku. Korpus se sastoji od 6.436 ručno označenih ...

  uvredljivi jezik, govor mržnje, srpski, tviter, leksikon, korpus

  Danka Jokić, Ranka Stanković, Cvetana Krstev, Branislava Šandrih. "A Twitter Corpus and Lexicon for Abusive Speech Detection in Serbian" in 3rd Conference on Language, Data and Knowledge (LDK 2021), MDPI AG (2021). https://doi.org/10.4230/OASIcs.LDK.2021.13 М33

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  Density maps from gravity inversion as a tool for the basin basement analysis and imaging cite

  Ivana Vasiljević (2023)

  Previously devised method for density mapping of the Cenozoic basin’s basement is further developed in order to improve the visualization and geological interpretation of the results. The method combines gravity-density inversion with forward modeling and requires gravity anomaly and depth-to-basement data. Although it was primarily designed for application in well-researched basins, such as Pannonian basin, method does not require further constrains. An information on density distribution in the Cenozoic sediments (from density logging or core density measurements) is important ...

  Ivana Vasiljević. "Density maps from gravity inversion as a tool for the basin basement analysis and imaging" in GEOSCIENCE 2023, Bucharest, Romania, November 9-11, 2023., Bucharest : SGAR - Romanian Society of Applied Geophysics (2023) М32