Претрага

Упит dcterms_subject_txt:Earth-Surface Processes,Geology

1138 items

  • Industrial Waste Heat Potential for Meeting Heat Demand in the Republic of Serbia

    Dejan Ivezić, Marija Živković (2023)
    Finalna potrošnja energije u industrijskom sektoru čini skoro 25% finalne potrošnje energije u Republici Srbiji. Procenjuje se da je 50-70% potrošnje energije u industriji namenjeno proizvodnji toplotne energije u različitim industrijskim procesima. Deo proizvedene toplotne energije se nepovratno gubi kao energija odvedena u okolinu: prenosom toplote kroz zidove procesne opreme, dimnim gasovim, otpadnim vodama itd. Korišćenjem otpadne toplote povećava se efikasnost korišćenja primarne energije i smanjuje ukupna potreba za energijom. Otpadna toplota se može koristiti u samom industrijskom objektu ...
    otpadna toplota, industrija, toplotne potrebe

  • Towards a Mining Equipment Ontology

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... objects or entities) • Instances (individual entities) • Relations between entities • Properties of entities and their values • Functions and processes entities are involved in • Constraints and rules pertaining to entities Based on these elements an ontology offers a formal representation of knowledge ...
    ... приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac ...
    ... MINING EQUIPMENT ONTOLOGY Ranka M. Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja University of Belgrade, Faculty of Mining and Geology, {ranka|ivano|olja|lily}@rgf.bg.ac.rs Summary: Comprehensive, consistent and standardized definition of terms in a specific area are crucial ...

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

    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
    ... rod (see Figure 3.2 - graph b). If the stroke and load of the smooth rod are recorded at the surface using a mechanical-hydraulic dynamometer, a surface dynamogram is obtained. The shape of the surface dynamogram depends on all factors 15 influencing the occurrence of dynamic loads, making it ...
    ... downhole dynamometric card. Examples of these patterns for operating conditions on surface and downhole dynamometric cards are shown in Figure 6.1. Line card Noise card Surface card Dovmnhole card Downhole card Surface card 6000 4000 ~ı M\ s s a) š 2000 0 5 10 15 20 25 30 b) š -4000 WAAWF@@JW{ ...
    ... Rotaded card Surface card Dovwnhole card Surface card Downhole card c) Lo ad (I b} o — Lo ad (Ib} ) [-] 8 Š } [[ (3} 0 30 40 50. Polished rod position (in} Polished rod position (in} 42 Figure 6.1. Examples of patterns for operating conditions on surface and downhole ...

  • Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović (2024)
    During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...
    expansive mortar, artificial screens, pressure, rock breaking, building foundation

  • A hydraulic–hydrochemical approach to impact assessment of a grout curtain on karst aquifer behavior

    Igor Jemcov, Marina Ćuk Đurović (2020)
    Earth and Planetary Sciences (miscellaneous), Water Science and Technology

  • 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, dependability

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... shock, i.e., rock mass vibration. Shock or rock mass oscillation can be a consequence of natural processes or human activities (in the performance of mining). Measurements and monitoring of seismic processes can be done in different ways, depending on the cause of the shock [1]. Intensity of the shock ...
    ... Parameters of the Law of Oscillation of the Rock Mass in Blasting. Ph.D. Thesis, Faculty of Mining and Geology, Belgrade, Serbia, 2010; pp. 35–38. 9. Simeunović, D. Mathematics; Faculty of Mining and Geology, Mining Department: Belgrade, Serbia, 1985; pp. 101–103. 10. Lutovac, S.; Trajković, S.; Katona ...
    ... Ph.D. Thesis, Faculty of Mining and Geology, Belgrade, Serbia, 1993. 18. Trajković, S.; Tokalić, R.; Lutovac, S. Study of Seismic Impaction the Surrounding Building Structures as the Result of Blasting at Nepričava Open Pit—Lajkovac; Faculty of Mining and Geology: Belgrade, Serbia, 2004; pp. 1–47 ...

  • Application of ERT in the study of debris-flow source area: Case study Selanac debris flow

    Dragana Đurić, Jelka Krušić, Biljana Abolmasov (2021)

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... Mining and Geology, biljana.lazic@rgf.bg.ac.rs RANKA STANKOVIĆ University of Belgrade, Faculty of Mining and Geology, ranka.stankovic@rgf.bg.ac.rs GIOVANNI SCHIUMA University of Basilicata, schiuma@arts4business.org MILADIN KOTORČEVIĆ University of Belgrade, Faculty of Mining and Geology, miladin ...
    ... principle of connecting the theory and practice is fulfilled by using the video tutorials. These tutorials are designed to present practical use of processes described in theoretical parts of lessons. Video tutorials are made by recording content of the screen and instructors voice. We concluded ...
    ... приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac ...

  • Keyword Extraction from Parallel Abstracts of Scientific Publications

    Slobodan Beliga, Olivera Kitanović, Ranka Stanković, Sanda Martinčić-Ipšić (2017)
    ... ground Mining Engineering” published by the University of Belgrade, Faculty of Mining and Geology. Apart from technical underground mining related topics, the journal publishes papers from other fields of mining, geology, and geosciences, as well as from other scientific and technical disciplines having a ...
    ... left side is an example where the SBKE method returned a larger set of keywords where the broader concept “method” is added to “analytic hierarchy processes (AHP)”. On the right side of the table is an example where the word “speed” is listed as a keyword specified by a human, but in the text the author ...
    ... приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac ...

  • Mine ventilation system planning using genetic algorithms

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...
    coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methods

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...
    ekspertni sistem, ventilacija
    ... obtain efficient communication between the symbolic and the numerical part of the system. In order to cope with this problem a separation of processes in coupled systems into independent modules is suggested. Furthermore, information interchange, i.e. communication among modules is strictly ...
    ... приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac ...
    ... appropriate software products. One of them is the software package SimVent for mine ventilation simulation developed at the Faculty of Mining and Geology of the University of Belgrade (Lilić, Stanković, and Obradović, 1994). This package, which enables the simulation of air flow distribution in ...

  • Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)

    Dušan Polomčić, Dragoljub Bajić, Jelena Zarić (2015)
    A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...
    Water supply, Aquifer, Flow, Groundwater regime, Numerical modeling, Particle tracking
    ... Stochastic Analysis, Environmental Geology, Vol. 54, pp 1081-1090, 2008, http://dx.doi.org/10.1007/s00254-007-0879-3 15. Yidana, M. S., Groundwater Flow Modeling and Particle Tracking for Chemical Transport in the Southern Voltaian Aquifers, Environmental Earth Science, Vol. 63, pp 709-721, 2011 ...
    ... Mining and Geology, University of Belgrade, Đušina 7, Belgrade, Serbia e-mail: dupol@gmail.com 2Department of Hydrogeology, Faculty of Mining and Geology, University of Belgrade, Đušina 7, Belgrade, Serbia e-mail: osljane@orion.rs 3Department of Hydrogeology, Faculty of Mining and Geology, University ...
    ... Yugoslavia, University of Belgrade – Faculty of Mining and Geology, pp 101-111, 1997. 18. Matić, I., Project of the Detailed Hydrogeological analysis of the Groundwater in the Municipality of Kikinda Territory, Faculty of Mining and Geology, Belgrade, 2007. 19. Rakić, D., Study on the Groundwater ...

  • Развој геолошког терминолошког речника ГеолИССТерм

    Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić (2011)
    ... http://www.esri.com/arcgis (accessed may, 2011). geoSciml resources repository http://www.geo- sciml.org (accessed may, 2011) One geology - making geological map Data for the earth Accessible http://www.onegeology.org rANkA STANkOvIć eT Al. ‒ The DevelOPmeNT OF The geOlISSTerm TermINOlOgIcAl DIcTIONAry ...
    ... or a class of entities, interactions or phe- nomena. One of the domains included in the english WordNet is geology, represented by 625 concepts. however, the selection and range of geology-related concepts and the relationships 53INFOtheca, № 1, vol XII, August 2011 rANkA STANkOvIć eT Al. ‒ The ...
    ... from the opinion that lists of geology terms for each domain should be made or favouring the idea of simply taking the terms from Geologic Terminol- ogy and Nomenclature edited by kosta Petković, through to the belief that taking the glossary from Glossary of Geology (Bates, and Jackson, ed., 1995) ...

  • Korelacija magnetnog susceptibiliteta i sadržaja metala u flotacijskom jalovištu

    Filip Abramović, Vesna Cvetkov, Aco Ilić, Dragana Životić (2022)
    Procena metala u rudama, jalovištu i zemljištu se tradicionalno određuje hemijskim metodama kao što su Rengen fluorescentna analiza (XRF), Instrumentalna neutronska aktivaciona analiza (INAA) i Masena spektrometrija induktivno spregnute plazme (ICP-MS). Neke od pomenutih metoda su veoma zahtevne i skupe, te se nametnula potreba ka traženju jeftinijeg alata za brzu procenu prisustva pojedinih metala. Tokom poslednjih nekoliko decenija, mnoge studije su pokazale da su magnetna merenja dovoljno osetljiva da detektuju magnetni signal feromagnetnih materijala, a samim tim i metala ...
    flotacijsko jalovište, makroelementi, magnetna merenja

  • Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... on between the Department of Earth Sciences of Utrecht University, the Netherlands and the Faculty of Mining and Geology, University of Belgrade, Serbia during the PhD of Nemanja Krstekanić and is funded by the Netherlands Research Centre for Integrated Solid Earth Science (ISES). The modelling ...
    ... tural patterns within strike-slip zones with or without syn-kinematic sedimentation are not significant on the scale of our models. Therefore, surface processes are in our view not among the controlling factors during the oroclinal bending of the Carpatho-Balkanides. Compared to the natural case of ...
    ... Acta Geodaetica et Geophysica 53, 395–413. Răbăgia, T., Matenco, L., Cloetingh, S., 2011. The interplay between eustacy, tectonics and surface processes during the growth of a fault-related structure as derived from sequence stratigraphy: the Govora–Ocnele Mari antiform, South Carpathians. T ...

  • Exhumation history of the Juhor Mts. in central Serbia, the Northern Serbo–Macedonian Subunit

    Uros Stojadinovic, Hannah Pomella, Nemanja Krstekanić, Bojan Kostić, Maja Maleš, Nikola Randjelovic, Miloš Radonjić (2024)
    Northern Serbo–Macedonian Subunit, low-t thermochronology, kinematic analyses, extensional deformations

  • Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation

    Maja Franković, Nevenka Novaković, Vesna Matović (2015)
    The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...
    Krečnjak, mapiranje, Indeks raspadanja, brzina raspadanja, progresija
    ... north @ Springer 6188 Environ Earth Sci (2015) 73:6181–6193 Fig. 4 Weathering: forms on the Dark Gate: a relief, b surface recession and granular disintegration, c remains of black crust, discoloration and detachment of crusts with stone material, d Surface recession, flaking and granular ...
    ... blocks showing very slight damage; 8 % of the surface @ Springer with very slight damage on the south facade did not change in 2014, comparing to the north one. On the north facade slight damage was present on only 3 % of the surface in Environ Earth Sci (2015) 73:606181–6193 South facade in ...
    ... the Dark Gate in correlation to damage category Environ Earth Sci (2015) 73:6181–6193 Group Loss of stone material Discoloration/deposits Detachment Fissures/deformation Main weathering forms Damage category || 2 3 4 5 Surface recession Intensity of decay Depth (cm) <02 0.2-—05 · ...

  • Anthropogenic impact on the groundwater regime: Case study of the Velika Morava alluvium

    Jovana Mladenović, Vesna Ristić Vakanjac, Milan Kresojević, Boris Vakanjac, Jugoslav Nikolić, Dušan Polomčić, Dragoljub Bajić (2023)
    The Velika Morava River originates at the junction of the Južna Morava and Zapadna Morava at the town of Stalać in Serbia. It is 185 km long and empties into the Danube. The Velika Morava River Basin occupies a land area of 37 444 km2. The river flows through central Serbia, which features the most fertile land and the highest population density in the country. Public water supply in this region of Serbia relies on groundwater formed in alluvial ...
    hydrology, surface water regime, groundwater regime, the Velika Morava River

  • High-resolution sequence stratigraphy of carbonates - theory and examples

    Jelena Stefanović, Dejan Radivojević (2020)
    Циљ рада је да кроз теоријски аспект и примере примене представи секвенциону стратиграфију високе резолуције карбонатних седимената. У том смислу први део се односи на појам и значење високе резолуције у секвенционој стратиграфији. Од временских и просторних скала које одговарају сеизмичким профилима у последњих двадесет година метода је нашла примену на скалама које одговарају бушотинским подацима или изданцима. Као најпогоднији седименти за овај тип истраживања су се показали карбонати јер су осетљиви на еустатичке промене, а основе секвенционе стратиграфије ...
    изданак, системска група, јура-креда, карбонатна платформа, плитководна средина
    ... CATUNEANU, O. 2019. Scale in sequence stratigraphy. Marine and Petroleum Geology. 106. pp.128- 159. GALLOWAY, W.E. 1989. Genetic stratigraphic sequences in basin analysis, I. Architecture and genesis of flooding surface bounded depositional units. AAPG (Am. Assoc. Pet. Geol.) Bull. 73, pp.125–142 ...
    ... Sedimentary Geology. 387. 10. pp.18-56. BOVER-ARNAL, T., SALAS, R., MORENO-BEDMAR, J.A. & BITZER, K. 2009. Sequence stratigraphy and architecture of a late Early–Middle Aptian carbonate platform succession from the western Maestrat Basin (Iberian Chain, Spain). Sedimentary Geology. Vol.219. pp ...
    ... Carbonates and relative changes in sea level: Marine Geology, v. 44, p. 181-212. KENTER, J.A.M., HARRIS, P.M. AND DELLA PORTA, G. 2005, Steep microbial boundstone- dominated platform margins – examples and implications: Sedimentary Geology, v. 178, p. 5 - 30. KERANS, C. and TINKER, S.W. 1999 ...