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Упит dcterms_subject_txt:additional energy engagement

388 items

  • Insights into dike nucleation and eruption dynamics from high-resolution seismic imaging of magmatic system at the East Pacific Rise

    Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Mladen R. Nedimović, Juan Pablo Canales, Hélène D. Carton, John C. Mutter, Javier Escartín (2023)
    Multidisciplinary

  • 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 (2019)
    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 ...
    open-cast coal mine, auxiliary works, bulldozers, optimization, availability
    ... Ristović! !- University ог Belgrade – Faculty ог Mining and Geology, Belgrade, SERBIA, dragan.ignjatovic(q)rgf.bg.ac.rs; 2 Ministry of Mining and Energy ог ће Republic ог Serbia, Belgrade, SERBIA 4bstract: Опе of the most important prerequisites јог the successful operatioh ој те ореп-сазг lignite ...
    ... at reduced costs. Acknowledgment: This paper was realized as a part of projects: “Improvement of Lignite Open cast Technology in Order to Increase Energy Efficiency and Occupational Safety” (TR 33039), “Developed new methods for diagnosis and examination mechanical structures” (TR 35040) and a part of ...

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... Geological information system of Serbia (GeolISS) 2008-2009, JEMCOV, I. & TRIVIĆ, B. 2009. 8 The project funded by the Provincial secretariat for energy and mineral resources: “Creation of the subsystem for the Autonomous province of Vojvodina within the framework of the geological information system ...
    ... PRODANOVIĆ, J., 2010. “GIS application in the manage- ment and administration of exploratory and exploitation permits”, 3rd International Symposium ENERGY MIN- ING 2010, Banja Junaković, Apatin. (In Serbian). STANKOVIĆ, R., TRIVIĆ, B., KITANOVIĆ, O., BLAGOJEVIĆ, B., NIKOLIĆ, V., 2011. “The Development ...

  • New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"

    Saša Ivanišević, Dejan Radivojević (2018)
    геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија
    ... level of  depositional energy, which leads to the reduction in the content of shale and increase in the content of  sand in the formation.  Bell shape of the GR log follows the trend of grain tapering out upwards, pointing  to the reduction in the level of depositional energy.  Cylindrical shape of  ...

  • Rule-based Automatic Multi-word Term Extraction and Lemmatization

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Biljana Lazić, Aleksandra Trtovac (2016)
    In this paper we present a rule-based method for multi-word term extraction that relies on extensive lexical resources in the form of electronic dictionaries and finite-state transducers for modelling various syntactic structures of multi-word terms. The same technology is used for lemmatization of extracted multi-word terms, which is unavoidable for highly inflected languages in order to pass extracted data to evaluators and subsequently to terminological e-dictionaries and databases. The approach is illustrated on a corpus of Serbian texts from ...
    term extraction, terminology, multi-word units, lemmatization, finite-state transducers
    ... work we will concentrate on:  Finalization of the web application;  Improvement of the precision of correct lemma production (development of additional strategies to avoid offering of incorrect lemmas). For instance, our results showed that at the end we obtained just a few (11) lemmas in plural ...
    ... be offered for a limited number of structures, e.g. if recognized only by one of these two graphs.  Development of new extraction FSTs for additional syntactic structures of MWTs, especially for terms with more than four components;  Application to various different domains (information and ...
    ... in the plural, although singular forms exist for simple word constituents. The first case occurs with the MWT električna.f energija.f ‘electric energy’ whose simple word lemma is *električni.m energija.f. The second case occurs with the MWT minerski.p radovi.p ‘blasting works’ whose simple word ...

  • Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

    Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović (2023)
    Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...
    Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol Injection

  • The effect of finite driving rate on avalanche distributions

    Sonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević (2021)
    Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear Physics

  • Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду

    главни и одговорни уредник Душан Поломчић (2016)
    Рударско-геолошки факултет
    ... MILIVOJEVIĆ M., 2003. Utilisation of geothermal energy in Serbia. In: Multiple Integrated Use of Geothermal energy, Reykjavik 14-17 September 2003. MARTINOVIĆ M., MILIVOJEVIĆ M., 2005. The possibilities for elektric energy production from geothermal energy in Serbia. Proceedings of the World Geo- thermal ...
    ... 2009: An Economic Model for the Appraisal and Selection of Energy Supply System. Applied Thermal Engineering, Vol. 29, No. 8–9. JOVANČIĆ P., TANASIJEVIĆ M., IVEZIĆ D., 2011: Serbian Energy Development Based on Lignite Production. Energy Policy, Vol. 39, No. 2, pp. 1191–1199. IVEZIĆ D., ĐAJIĆ N ...
    ... natural gas. Proceedings of 5th International Scientific Conference on Energy and Climate Change, 192–199, Atina, Grčka. IVEZIĆ D., ĐAJIĆ N., ŽIVKOVIĆ M., 2013: Potential and Barriers to Renewable Energy Sources in Serbia. Energy Sources, Part B: Economics, Planning, and Policy, Vol. 8, No. 2, pp. ...

  • Split-Desktop software for the analysis of fragment size distribution of blasted rock mass

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović (2023)
    Drobljenje stena je najvažniji pokazatelj u proceni efekata miniranja pri proizvodnom miniranju u površinskoj eksploataciji. Stepen drobljenja stena ima veliki uticaj na efikasnost daljih operacija utovara, transporta, drobljenja i mlevenja. Optimalno drobljenje stena pri proizvodnom miniranju utiče na smanjenje ukupnih troškova proizvodnje. Stoga je pouzdana procena veličine drobljenja odminirane stenske mase veoma važno pitanje, ne samo u operacijama miniranja, već i u rudarskoj proizvodnji. Za predviđanje distribucije veličine komada odminirane stenske mase postoje različiti empirijski modeli. KUZ-RAM model omogućava ...
    Split-Desktop softver, drobljenje stena, miniranje, analiza, digitalna obrada fotografija

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... eliminate cosmic events and to increase the signal-to-noise ratios. The Raman study assisted in the identification of representative areas for additional local analyses. FTIR ATR spectra were recorded on powdered samples with an Alpha (Bruker Optics, Ettlingen, Germany) instrument equipped with ...
    ... identifying, residues testifying to nondomestic, chemical and metallurgical uses in the case of these ceramics. A sorting, of useful shards for additional analyses can therefore be done on site, in museum reserves or on excavation sites. Author Contributions: Conceptualization, P.C.; methodologyy ...
    ... M 'l Fe 7: ca K ·•š V J cCr Š' |-- i 4 | : I_ E = i ca 5 ež | S : 1032 1062 Fe N Ni 0 0 5000 10000 o 250 500 750 1000 1250 Energy / eV Wavenumber / cm” Figure 6. Representative EDS (left) and Raman (right) spectra recorded on spots 0 and 4 of sample b (see Figure 1). The ...

  • Distribution of major and trace elements in the Kovin lignite (Serbia)

    Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)
    geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...
    General Earth and Planetary Sciences, General Environmental Science
    ... ry and minera­ logy of Greek lignites from Ioannina basin.– Energy Sources, 19, 111–128. doi: 10.1080/00908319708908837 GEORGAKOPOULOS, A. (2001): Trace elements in the lava xylite/lignite deposit, Servia basin, Northern Greece.– Energy Sources, 23, 143–156. doi: 10.1080/ 00908310151092335 GLUSKOTER ...
    ... affinities and their behavior during peat combustion.– Energy Fuel, 16, 1476–1482. doi: 10.1021/ef0200673 KARAYIGIT, A.I. & GAYER, R.A. (2000): Trace elements in a Pliocene–Pleistocene lignite profile from the Afşin–Elbistan field, Eastern Turkey.– Energy Sources, 22/1, 13–21. KARAYIGIT, A.I., GAYER, R ...
    ... Journal of the Croatian Geological Survey and the Croatian Geological Society 1. INTRODUCTION Lignites of Upper Miocene age are the most important energy source in Serbia. Almost all lignite production (90%) from the Kolubara and Kostolac basins is used in thermal power plants (TPP), (EPS, 2018). ...

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... Received: May 29, 2015 Accepted: June 15, 2015 Abstract: During blasting operations, the potential energy of explosive materials is transformed into a mechanical work. That energy, in the vicinity of blasting location, destructs and crushes rock mass, a bit further creates cracks and permanent ...

  • Structural characterization of traditional pottery produced from local clay, Rujište (Ražanj, Central Serbia), in an effort to preserve its geoheritage

    Maja Milošević, Biljana Đorđević, Alena Zdravković (2021)
    ... which was named after them. Their local names are lulavica and crepuljarski pesak (“pottery sand”). According to the manufacturers, there are no additional components, because the clays themselves meet the conditions for making quality vessels meant for thermal processing of food. The technic of ...
    ... manufacture of traditional pottery, bread-baking pan called crepulja, prepared with raw local clays from Ražanj area in western Serbia, without any additional tempers added. Pottery manufacture with these specific raw materials and the final function of the product is closely connected, when material ...
    ... conducted with a scanning electron microscope (SEM) equipped with a detector for secondary electrons (SE), back-scattered electrons (BSE), modern energy-dispersive spectrometer (EDS), a wavelength-dispersive spectrometer (WDS) and a cathodoluminescence detector (CL) were applied to determine the ...

  • Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2017)
    Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...
    ... 55 queries were obtained, as illustrated in Fig. 6 for the query “geothermal energy in spas”. It should be noted that results in this section are presented and Fig. 6. Precision-recall curve for the query “geothermal energy in spas”. A u t h o r P r o o f Improving Document Retrieval in Large ...
    ... the response to a user query related to a collection of documents is performed by keyword search of these documents, then a preprocessing phase for additional representation of document content is not necessary. However, when these collections reach a certain volume, simple keyword search through the entire ...
    ... becomes time consuming and inefficient, as the recall grows but precision is likely to drop considerably. Thus in the case of large collections, an additional representation of the document content is generated, formally referred to as the document surrogate, with the aim of increasing document retrieval ...

  • Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining

    Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović (2019)
    Analitički hijererhijski proces (AHP), dozeri, eksploatacija uglja, površinski kopovi
    ... the changes in the weight coefficients of the basic parameters, an analysis of the susceptibility to a desired criterion is possible, which is an additional advantage of applying the AHP method. Figure 6. The structure of the model in choosing the dozer using the AHP method. The diagram displays abscissa ...
    ... the changes in the weight coefficients of the basic parameters, an analysis of the susceptibility to a desired criterion is possible, which is an additional advantage of applying the AHP method. Author Contributions: Conceptualization, I.R. and D.I.; methodology, T.S. and S.D.; validation, P.J.; formal ...
    ... Ivan Jankovic 1, Stevan Djenadic 2, Dragan Ignjatovic 2, Predrag Jovancic 2, Tomislav Subaranovic 2 and Ivica Ristovic 2,* 1 Ministry of Mining and Energy, 11000 Belgrade, Serbia; ivan.jankovic@mre.gov.rs 2 Faculty of Mining and Geology, University of Belgrade, 11000 Belgrade, Serbia; stevan.djenadic@rgf ...

  • Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material

    Borislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić (2022)
    Pyrophyllite, with the chemical formula Al2Si4O10(OH)2, is a naturally occurring and abundant van der Waals mineral belonging to the group of phyllosilicates. It is very soft, layered crystal used for sculpting and an excellent electrical and thermal insulator aimed for the operation at high pressure and temperature. Here, for the first time, two-dimensional (2D) pyrophyllite obtained by both mechanical and liquid phase exfoliation is presented and investigated at the nanoscale. The layered structure provides low friction coefficient of around ...
    Atomic force microscopy, Insulating properties, Nanofriction and wear, Natural two dimensional materials, Phyllosilicates, Pyrophyllite

  • 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

  • Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)

    Howard R. Feldman, Barbara V. Radulović, Fayez Ahmad (2023)
    Brachiopods, Middle Jurassic, Sphriganaria, shell microstructure, Ethiopian Province

  • Development of an integrated model for open-pit-mine discontinuous haulage system optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)
    equipment selection, mine mechanization, expert judgment, linguistic variables, MCDM, FAHP

  • Одређивање оптималних параметара цевовода за двофазни проток

    Николина Ћурчић (2024)
    Eфикасно управљање протоком флуида је кључно за оптимизацију перформанси система и обезбеђивање оперативне сигурности. Двофазни ток, који подразумева истовремено присуство течне и гасне фазе унутар цевовода и измењивача топлоте, представља један од најсложенијих аспеката динамике флуида. Овај феномен намеће јединствене изазове који захтевају дубоко разумевање и прецизно планирање. Ефикасно управљање двофазним током није само кључно за одржавање ефикасности система, већ је и неопходно за спречавање потенцијалних проблема као што су повећана ерозија, неочекиване флуктуације притиска и ризици по безбедност. У ...
    евовод, оптимизација, двофазни проток, параметри цевовода, трошкови
    ... i CompilanceSigns. (n.d.). Pipelines: The Lifeline and Liability of Qur Energy Infrastructure. Retrieved from CompilanceSigns: https://www.compliancesigns.com/blog/pipelines-the-lifeline-and-liability-of- our-energy-infrastructure/ Enbridge. (2018, May 30). Why are pipelines the best, safest ...
    ... n and Production Technology 12, 3033—3057. Canada, E. C. (2023, August 9). Pipeline 101 — Four Diffjerent Types of Pipelines. Retrieved from Energy Connections Canada: https://energyconnectionscanada.com/pipeline-101-four-different-types-of- pipelines/ Cevovodi. (2020, June 13). Retrieved ...
    ... to transport oil and gas? Retrieved from Enbridge : https://www.enbridge.com/Your-questions/User- submitted/Why-are-pipelines-safest-way-to-move-energy-products.aspx Engineering, C. (n.d.). 7wo-Phase Flow in Pipelines and Heat Exchangers: A Comprehensive Guide. Retrieved from Converge Engineering ...