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Упит dcterms_subject_txt:underground exploitation

218 items

  • Automatic construction of a morphological dictionary of multi-word units

    Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić (2010)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multiwordn units, noun phrases, query expansion
    ... entries is a module of the LeXimir tool [6], which is written in C# and operates on the .NET platform. It supports development, maintenance and exploitation of various resources: e- dictionaries, wordnets, and aligned texts. A user of this tool need not use all of these resources, or even possess them ...

  • Resource-based WordNet Augmentation and Enrichment

    Ranka Stanković, Miljana Mladenović, Ivan Obradović, Marko Vitas, Cvetana Krstev (2018)
    In this paper we present an approach to support production of synsets for SerbianWordNet(SerWN)byadjustingPrincetonWordNet(PWN)synsetsusing several bilingual English-Serbian resources. PWN synset definitions were automatically translated and post-edited, if needed, while candidate literals for Serbian synsets were obtained automatically from a list of translational equivalents compiled form bilingual resources. Preliminary results obtained from a setof1248selectedPWNsynsetsshowthattheproducedSerbiansynsetscontain 4024 literals, out of which 2278 were offered by the system we present in this paper, whereas experts added the remaining 1746. Approximately one half of ...
    WordNet, bilingual resources, term alignment, parallel lists
    ... Information science and technology, 7(1-2):9–43. Vintar, Š. and Fišer, D. (2017). Enriching Slovene wordnet with domain-specific terms. Annotation, exploitation and evaluation of parallel corpora: TC3 I: TC3 I, 3. Vossen, P. (1998). EuroWordNet: A Multilingual Database with Lexical Semantic Networks. Kluwer ...

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)

  • 2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem

    Branislav Sretenović, Filip Arnaut, Ivana Vasiljević, Vesna Cvetkov (2019)
    2D inversion, geoelectrical method, Wenner array, ecology, Ada Huja
    ... faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs UNDERGROUND MINING ENGINEERING 34 (2019) 59-76 UDK 62 UNIVERSITY OF BELGRADE - FACULTY OF MINING AND GEOLOGY ISSN 03542904 Original scientific paper ...
    ... that number is not an issue because the waste is deposited for 59 years (in the year 2019). The mechanism is accelerated with the presence of underground waterthat was detected. There are secondary problems that arise with the disposal of PET containers in landfills, such as production of benzene ...
    ... Vasiljević I., Cvetkov V. can speed up the process of gas production. This is of great value for the examined terrain “Ada Huja” because underground water level was detected. 4 CORRECT ECOLOGICAL AND GEOLOGICAL CONDITIONS FOR A LANDFILL From a geological point of view, the most important ...

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... Besna Kobila metallographic region (1823 m) and it is located in the southeast of Serbia, near the town Vranje (Figure 1). In the Grot mine, the exploitation and processing (flotation) of lead-zinc ore is carried out. Production of ore in the Grot mine is about 14,000 tons of ore monthly, and about 800 ...
    ... Mater. 2011, 186, 160–168. [CrossRef] [PubMed] 20. Reza, R.A.; Ahmaruzzaman, M. A novel synthesis of Fe2O3 activated carbon composites and its exploitation for the elimination of carcinogenic textile dye from aqueous phase. RSC Adv. 2015, 5, 10575–10586. [CrossRef] http://dx.doi.org/10.1016/j.seppur ...

  • 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
    ... Modelling and Assessment of Optimal Exploitation of the Nemanja Karst Springs, Serbia. Acta Carsologica, Karst Research Institute ZRC SAZU; DOI: 556.34(497.11) JEMCOV I., MILANOVIĆ S., MILANOVIĆ P., DAŠIĆ T., 2011: Analysis of the utility and management of karst underground reservoirs: case study of the ...
    ... PETROVSKI A., JOSIPOVIĆ PEJOVIĆ M., BELJIĆ Č., GAJIĆ G., ČEBAŠEK V., 2011: Formation of Geoinformation System of the Coal Mine With Underground Coal Exploitation. Proceedings, 22nd International Mining Congress, Ankara, Turkey, 11-13.05.2011, The Chamber of Mining Engineers of Turkey, Ankara, 209–218 ...
    ... 2014-0007. MILUTINOVIĆ A., GANIĆ A., GANIĆ M., TOKALIĆ R., 2014: Prediction of Surface Subsidence for the Purpose of Mining Project of Underground Exploitation of Bauxite Ore In the Deposit "Podbraćan". VI International Geomechanics Conference, Varna, Bulgaria, 24-28 June 2014, pp. 414–421, Scientific ...

  • Building learning capacity by blending different sources of knowledge

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić (2016)
    ... e and communication links must function flawlessly. In brief, there is a lot of work to be done before the BAEKTEL network enters full exploitation to the benefit of university students in their preparation for the labour marker, and of those who have graduated, in their lifelong learning ...

  • Towards the semantic annotation of SR-ELEXIS corpus: Insights into Multiword Expressions and Named Entities

    Cvetana Krstev, Ranka Stanković, Aleksandra Marković, Teodora Mihajlov (2024)
    Овај рад представља активности на развоју корпуса ELEXIS-sr, српском додатку вишејезичном анотираном корпусу ELEXIS-а, који се састоји од семантичких анотација и репозиторија значења речи. ELEXIS је паралелни вишејезични анотирани корпус на десет европских језика, који може да се користи као вишејезички репер за евалуацију европских језика са мање и средње развијеним ресурсима. Фокус овог рада је на вишечланим изразима и именованим ентитетима, њиховом препознавању у скупу реченица ELEXIS-sr и поређењу са анотацијама на другим језицима. Разматрају се први кораци ...
    полилексемске језинице, именовани ентитет, вишезначност значења речи, складиште смисла, LLOD

  • Fuzzy Model for Risk Assessment of Machinery Failures

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...
    fazi teorija, rizik, otkaz rudarskih mašina
    ... assessment can be used in terms of project management [19]. Ataei et al. have used fuzzy logic theory and fuzzy rules in the selection of machinery in underground coal mines [20]. Kabir and Papadopoulos [21] have analyzed methodologies based on fuzzy set theory that have been applied to safety and reliability ...
    ... construction. Saf. Sci. 2017, 93, 16–28. [CrossRef] 11. Mahdevari, S.; Shahriar, K.; Esfahanipour, A. Human health and safety risks management in underground coal mines using fuzzy TOPSIS. Sci. Total Environ. 2014, 488–489, 85–99. [CrossRef] 12. Li, W.; He, M.; Sun, Y.; Cao, Q. A novel layered fuzzy ...
    ... failures in a technical system is based on the state of the machinery at the time it is observed (in this study, we did this in the context of the exploitation of mineral resources and mineral processing). The condition of the machines is examined through an analysis of existing data on the operation ...

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... vice president of Language Resources and Technologies Society (JERTEH). She actively participated in BAEKTEL Tempus project in building and exploitation and learning platform. She published more than 100 papers in journals and proceedings of scientific conferences, most of them in the area of ...

  • Model za optimizaciju graničnog saržaja metala u rudi u funkciji dugoročnog planiranja površinskih kopova

    Daniel P. Kržanović (2016-06-14)
    Optimizacija graničnog sadržaja metala u rudi jedan je od osnovnih koraka u planiranju i dizajniranju površinskih kopova i ima za cilj postizanje maksimalne neto sadašnje vrednosti (NPV). Iz tog razloga, optimizacija graničnog sadržaja i danas je predmet mnogih istraživanja u rudarskoj nauci, sa ciljem rešavanja praktičnih problema u eksploataciji ležišta.Dugoročno planiranje eksploatacije na površinskim kopovima podrazumeva sagledavanje svih relevantih parametara i faktora (geologije rudnog ležišta, tehnologije proizvodnog procesa, kapaciteta otkopavanja i prerade, troškova, cena metala, iskorišćenja i dr) kako ...
    površinski kop, dugoročno planiranje, optimizacija graničnog sadržaja, maksimizacija neto sadašnje vrednosti (NPV).
    ... even today the subject of many researches in the mining science, with the aim of solving the practical problems in the exploitation of deposits. Long-term planning of exploitation at the open pit involves consideration of all relevant parameters and factors (geology of ore deposit, production process ...
    ... system of exploitation, flotation and metallurgical processing of ore. In particular, the application of proposed model is achieved by maximization the net present value of the project. The importance of optimization the cut off grade of metal in the ore for long-term planning in exploitation the open ...
    ... options applied to mine project evaluation?, 35th APCOM Symposium, Australia, Proceedings, pp. 557-570. McIsaac, G., 2008, Strategic Design of an Underground Mine Under Conditions of Metal Price Uncertainty, Doctoral thesis, Queens University: Faculty of Applied Science, Department of Mining Engineering ...

  • 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
    ... methods used do not give a global optimal solution especially in complex mining processes such as exploitation systems on surface mines. An integral approach to optimizing planning and analyzing the exploitation system is a very important approach in the evaluation of mining projects, and significantly affects ...
    ... over 50% of the total cost of exploitation. The results of the research through the case study showed that the developed methodology and integral model with software support can be efficiently applied in order to achieve maximum economic effects, especially in exploitation of low quality coal deposits ...
    ... Mittmann, R., Lohsträter, O., Lindig, M., Minnecker, C., Donner, R., 2015, RTRO–coal: real-time resource-reconciliation and optimization for exploitation of coal deposits. Minerals, 5 (3), 546-569. Beretta, F., Costa, J., Koppe, J., 2010, Reducing coal quality attributes variability using properly ...

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... Serbia in 1889 (Stevanović, 1997: 2015) made his further works closely related to karst hydrogeology, although at that time he used the term “underground hydrography". „Therefore, along with Svetolik Radovanović, who &«wrote “Podzemne vode“ (“GroundwateY", 1897), a book adopted by Serbian hy ...
    ... and construction of hydrogeological facilities (boreholes, wells and tapping structures), special speleological and „caving research of karst underground morphology, groundwater monitoring and database creation, application of GIS in hydrogeology, problems in karst mining hydrogeology as well as ...
    ... CHK took these distinguished guests on a tour of karst terrains of eastern Serbia, which is well known for its numerous attractive surface and underground karst features, as well as beautiful nature. At the end of 2021, CKH was visited by Prof. Dr. Olga Meshcheriakova, Deputy Dean for Extracurricular ...

  • Remedijacija otpadnih voda Rudnika prirodnim zeolitom

    Igor Veličković (2024)
    U radu je razmatrano prečišćavanje otpadnih flotacijskih voda sa područja rudnika Rudnik prirodnim zeolitskim tufom sa planine Jastrebac. Prečišćavanje otpadnih flotacijskih voda sa područja rudnika Rudnik prirodnim zeoliskim tufom sa obronaka planine Jastrebac pokazala se veoma efikasnom. Naime, u tri otpadne flotacijske vode utvrđen je povišen sadržaj arsena, hroma, gvožđa, mangana, kao i nikla. Jednostavnim tretmanom zeolitskim tufom iz ovih voda uklonjeni su svi ovi elementi. Sadržaji gvožđe i mangana su sniženi od 95 do 99 %, dok su ...
    flotation waste water, zeolite tuff, purification
    ... increased, especially if the zeolite was surface modified. In this final work, preference is given to natural zeolitic tuff, because apart from exploitation, there are no additional costs for separation and/or modification, and the efficiency of removing. toxic elements is quite satisfactory. Key ...

  • Assessments of effects of implementation of strategic plans for development of Belgrade District heating system

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić (2020)
    The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...
    Daljinsko grejanje, LEAP, Primarni energetski faktor, Uvozna zavisnost, CO2 emisija

  • Determination of Mechanical Properties of Altered Dacite by Laboratory Methods

    Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović (2021)
    This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...
    Geology, Geotechnical Engineering, Engineering Geology
    ... discs. Liu et al. [5] examined composite samples comprised of rocks with different strengths and coals to determine the strength of the pillars of underground facilities formed in the rock mass. In their study, Berisavljević et al. [6] investigated how the strength of composite samples composed of sandstone ...
    ... strength of rock materials in triaxial compression. Int. J. Rock Mech. Min. Sci. Géoméch. Abstr. 1978, 15, 47–51. [CrossRef] 20. Brown, E.T.; Hoek, E. Underground Excavations in Rock; CRC Press: London, UK, 1980. 21. Tan, Y.-Y.; Zhang, K.; Yu, X.; Song, W.-D.; Wang, J.; Hai, C.-L.; Tan, Y.-Y.; Zhang, K.; Yu ...
    ... Geological Research on the Project of Applied Geological Research of Dacite as Technical-Building Stone in the Deposit ‘Ćeramide’ near Rudnik in the Exploitation Field; Technical Report for Jantar grupa d.o.o.: Pancevo, Serbia, April 2020. 12. Tuğrul, A.; Zarif, I. Correlation of mineralogical and textural ...

  • ‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions

    Liliana Gianni, Hélène Renel, Aleksandar Kremenović, Philippe Colomban (2020)
    Representative ‘Blue speckled’ (13–16th centuries) and ‘Brown speckled’ (13–21st century) wares recovered from the excavations in Qalhât or collected around Bahlâ city (Sultanate of Oman) were characterized by XRPD, SEM-EDS, Raman/optical microspectroscopy, and thermal expansion. Minerals present in the body (quartz, augite and albite as major phases, calcite, dolomite, rutile, anatase, phosphate, hematite and magnetite as minor phases) were identified by XRPD and/or Raman spectroscopy. SEM-EDXS microanalysis was performed on the glazes in order to compare their composition, especially ...
    Firing, Glaze, Traditional ceramics, Provenance studies, Augite

  • Hidrogeoekološki aspekti aksploatacije uglja u Pelagonijskom basenu (Makedonija)

    Kostadin J. Jovanov (2016-06-24)
    Leţišta uglja „Suvodol“, „Brod-Gneotino“ su u eksploataciji, a leţište uglja „Ţivojno“je u fazi pripremi. Nalaze se u krajnjem jugoistočnom i juţnom delu Pelagonijskekotline. Sva tri leţišta stvorena su u neogenim sedimentima u jezerskim uslovimasedimentacije u zoni kontakta sa prekambrijumskim kristalastim stenama. Kod sva trileţišta ugalja se javljaju više slojeva različite debljine, u okviru kojih se nalaze klastičnisedimenti (gline, peskovi i dr.). U podini ugljenog basena nalaze se kristalaste steneprekambrijumske starosti.Teren u okolini leţišta uglja karakteriše se umereno kontinentalnom klimom, ...
    ugalj, podzemne vode, površinske vode, neogeni kompleks, izdani,transmisibilnost, nivo podzemne vode, sniţenje nivoa
    ... aspects of coal exploitation in Pelagonia basin (Macedonia) Kostadin J. Jovanov Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Hidrogeoekološki aspekti aksploatacije uglja u Pelagonijskom basenu (Makedonija);Hydrogeological aspects of coal exploitation in Pelagonia ...
    ... UNIVERSITY OF BELGRADE FACULTY OF MINING AND GEOLOGY Kostadin J. Jovanov HYDROGEOLOGICAL ASPECTS OF COAL EXPLOITATION IN PELAGONIA BASIN (MACEDONIA) Doctoral Dissertation Belgrade, 2016 i Mentor: ...
    ... the channels for acquisition of water in layer’s pits and drainage wells which get hold ofground water before its flow in mining works. Coal exploitation as well as the coal drainage works has quite an influence on the environment. Coal mines have rather an influence on the environment. The mentioned ...

  • Fuzzy expert analysis of the severity of mining machinery failure

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    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 ...
    Severity of failure, Severity of failure assessment, Mining machinery, Fuzzy sets, Fuzzy logic

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija
    ... 3075 There is one facility storage for natural gas, Underground Storage Banatski Dvor, which performs natural gas storage and storage operation. It is founded and owned by PC Srbijagas (49%) and Gazprom Germania (51%) [67]. The very first underground gas storage “Banatski Dvor” was finalized and operational ...
    ... pipelines Gas pipeline PE Srbijagas Gas pipeline Yugorosgas Main measuring regulation station Input transmitter station Output transmitter station Underground storage Compressor station                                                   ‐                                                М             ...
    ... and a planned capacity of 1.6 BCM per year with investment costs of 85 million € (6 million € part of investment in Serbia) [58]; 4. Expending Underground storage “Banatski Dvor” capacities from 800 mcm to 1 BCM per year with investment costs of 65 million € [58]. Based on this list of infrastructure ...