Претрага
2295 items
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Prognoza operativne efikasnosti aktivnog podzemnog rudnika zasnovana na teoriji sivih sistema
Svetlana M. Štrbac-Savić (2016-06-10)Efikasnost predstavlja preduslov za opstanak svake rudarske kompanije, posebno u uslovima izuzetno konkurentnog trţišnog okruţenja kao što je to rudarska industrija. Efikasnost oznaĉava sposobnost kompanije da ispuni svoje kratkoroĉne ili dugoroĉne ciljeve. Operativna efikasnost se definiše kao odnos izmeĊu ulaznih parametara potrebnih za odvijanje proizvodnje i pokazatelja dobijenih proizvodnjom. U kontekstu rudarskog poslovanja, operativna efikasnost se odnosi na vreme potrebno da se mineralno dobro transformiše u novĉana sredstva. Visoka operativna efikasnost se postiţe kada se ostvari prava kombinacija karakteristika ...podzemni rudnik, operativna efikasnost, prognoza, teorija sivih sistema, stohastiĉke diferencijalne jednaĉine, simulacijaSvetlana M. Štrbac-Savić. "Prognoza operativne efikasnosti aktivnog podzemnog rudnika zasnovana na teoriji sivih sistema" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-06-10)
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Određivanje teorijskog termičkog potencijala napuštenih naftnih i gasnih bušotina
Marija Ilić, Marija Živković, Dušan Danilović, Miroslav Crnogorac, Vesna Karović Maričić, Lola Tomić (2023)U Srbiji postoji oko 1.200 napuštenih naftnih i gasnih bušotina, koje imaju značajan potencijal za proizvodnju toplotne energije. Napuštene bušotine, u zavisnosti od lokacije gde se nalaze i termičkog potencija sa kojim raspolažu, se mogu koristiti za proizvodnju toplotne energije ili električne energije, ili za kombinovanu proizvodnju električne i toplotne energije. Toplotna enegija koja je proizvedena iz napuštenih bušotina dobija se korišćenjem geotermalne energije, pa se i električna i /ili toplotna energija koja bi se dobila korišćenjem takvih toplotnih izvora bilansira ...Marija Ilić, Marija Živković, Dušan Danilović, Miroslav Crnogorac, Vesna Karović Maričić, Lola Tomić. "Određivanje teorijskog termičkog potencijala napuštenih naftnih i gasnih bušotina" in Tehnika, Savez inženjera i tehničara Srbije (2023). https://doi.org/10.5937/tehnika2306667I М53
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First insights into the Mesolithic settlement of Southern Serbia - Excavation of the Pešterija Cave in the Ponišavlje Region
Dušan Mihailović, Ivana Živaljević, Vesna Dimitrijević, Sofija Dragosavac, Danilo Pajović, Anđa Petrović, Katarina Bogićević, Dragana Đurić, Mirela Djurović, Steven Kuhn, Mirjana Roksandić (2024)Ranoholocenski lokaliteti u Srbiji su do sada bili poznati samo iz oblasti Đerdapske klisure. Neki arheolozi tvrde da je očigledan nedostatak mezolitskih lokaliteta posledica neadekvatnog istraživanja u ovoj oblasti, dok drugi pretpostavljaju da ekološki uslovi u centralnom Balkanu tokom ranog holocena možda nisu bili povoljni za život zajednica lovaca-sakupljača. Međutim, suprotno dosadašnjim mišljenjima, novija istraživanja pećina u istočnoj Srbiji otkrila su da su ljudi ipak naseljavali ovu oblast tokom mezolita. Tragovi naseljavanja mezolitskih grupa, koji datiraju sve do 7. ...Dušan Mihailović, Ivana Živaljević, Vesna Dimitrijević, Sofija Dragosavac, Danilo Pajović, Anđa Petrović, Katarina Bogićević, Dragana Đurić, Mirela Djurović, Steven Kuhn, Mirjana Roksandić. "First insights into the Mesolithic settlement of Southern Serbia - Excavation of the Pešterija Cave in the Ponišavlje Region" in Documenta Praehistorica, University of Ljubljana (2024). https://doi.org/10.4312/dp.51.7 М24
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Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude
Ivana M. Jovanović (2016-01-13)U oblasti procesa prerade rude, flotacijska koncentracija predstavlja jednu od najznačajnijih i najčešće primenjivanih metoda separacije korisnih od nekorisnih minerala. Samim tim, veoma je važno osigurati uspešan rad flotacijskog postrojenja kroz dostizanje zadovoljavajućih tehno-ekonomskih pokazatelja. Cilj upravljanja procesom flotacijske koncentracije je upravo optimizacija kvaliteta i iskorišćenja korisne komponente u koncentratu uz maksimizaciju profita. Shodno tome, istraživanja na polju modelovanja i upravljanja ovim procesom zauzimaju značajno mesto u praksi kontolnog inženjenringa.Teorijska istraživanja u okviru doktorske disertacije obuhvatila su analizu položaja ...flotacijska koncentracija, modelovanje, upravljanje, inteligentni sistem, soft kompjuting, fazi logika, veštačke neuronske mrežeIvana M. Jovanović. "Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-01-13)
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Optimizacija parametara reza rotornog bagera pri otkopavanju materijala sa povećanom čvrstoćom
Saša D. Bošković (2016-09-09)Otkopavanje materijala rotornim bagerom je veoma sloţen fiziĉko-mehaniĉki proces. Pokazatelji efektivnosti tog procesa zavise od velikog broja raznovrsnih ĉinilaca od kojih se posebno mogu istaći: fiziĉko-mehaniĉke karakteristike materijala koji se otkopava, reţim rada bagera i izbor tehnoloških parametara bloka, odreska i reza, geometrije vedrica i zuba itd. Poseban problem se javlja kod otkopavanja materijala povećane ĉvrstoće, što je ĉest sluĉaj na našim površinskim kopovima. Dimenzionisanje specifiĉne sile kopanja bagera prema manjim masama izuzetno ĉvrstog materijala je neracionalno i rešenje ...rotorni bager, parametri reza, otpor na kopanje, dinamika bagera, kapacitet, optimizacija, specifična potrošnja energijeSaša D. Bošković. "Optimizacija parametara reza rotornog bagera pri otkopavanju materijala sa povećanom čvrstoćom" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-09-09)
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Режим изворских вода из кристаластих стена у планинским подручјима на примеру Топлог Дола на Власини (Југоисточна Србија)
Сунчица Гардијан, Владимир Живановић, Сава Магазиновић, Ђорђе Мандић, Саша Стојадиновић. "Режим изворских вода из кристаластих стена у планинским подручјима на примеру Топлог Дола на Власини (Југоисточна Србија)" in Zbornik radova XVI srpskog Simpozijum o hidrogeologiji sa međunarodnim učešćem, Univerzitet u Beograd, Rudarsko-geološki fakultet (2022) М33
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Monitoring the Impact of Artificial Structure on Hydrogeological Environment: A Case Study of Hydraulic Tunnel at Pirot Hydropower Plant
Marina Čokorilo Ilić, Miroslav P. Popović, Dragoljub Bajić, Vesna Matović, Filip Abramović, Filip Alimpić (2024)hidroenergetski tunel, podzemne vode, hidrogeološki monitoring, pijezometri, fizičkohemijsko osmatranje, hidrometrija, unakrsna korelacijaMarina Čokorilo Ilić, Miroslav P. Popović, Dragoljub Bajić, Vesna Matović, Filip Abramović, Filip Alimpić. "Monitoring the Impact of Artificial Structure on Hydrogeological Environment: A Case Study of Hydraulic Tunnel at Pirot Hydropower Plant" in Sensors, MDPI AG (2024). https://doi.org/10.3390/s24206578 М21
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Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP
Tunel pod pritiskom, Unutrašnji pijezometri, Tranzijenti pritiska, Karstna izdan, Pukotinska izdan, Hidraulički odzivIgor Jemcov, Maja Todorović, Aleksandar Jemcov, Marina Ćuk Đurović. "Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP" in Journal of Hydrology, Pirot, 2024, Elsevier BV (2024). https://doi.org/10.1016/j.jhydrol.2024.132068 М21а
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Design and drilling of wells in formations with high pressure
Vojin Solomun (2024)Objectives of this Thesis are to: - Develop an awareness of the challenges presented from elevated temperatures and pressures in well construction. - Learn the key differences between ―normal‖ condition wells and HPHT wells. - Understand some of the indicators of thermal- and pressure-related problems. - Understand the responses which may be made to mitigate high pressure and high temperature ,,HPHT‘‘ challenges while drilling wells. HPHT wells are an unavoidable consequence of the ever expanding search for oil and gas resources around the world. As wells are ...Vojin Solomun. Design and drilling of wells in formations with high pressure, 2024
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Novel cerium and praseodymium doped phosphate tungsten bronzes: Synthesis, characterization, the behavior in the Briggs-Rauscher reaction and photoluminescence properties
Tijana Maksimović, Pavle Tančić, Jelena Maksimović, Dimitrije Mara, Marija Ilić, Rik Van Deun, Ljubinka Joksović, Maja Pagnacco (2023)Due to the interesting and potentially useful properties, phosphate tungsten bronzes are constantly being studied and attract a lot of attention. In the present work, two different metallic elements, belonging to the group of rare-earth metals, cerium and praseodymium, were used as a dopants for phosphate tungsten bronzes. Novel cerium and praseodymium doped phosphate tungsten bronzes were successfully synthesized and further characterized by thermal analyses, Fourier-transform infrared spectroscopy, X-ray powder diffraction, scanning electron microscopy with energy-dispersive X-ray spectrometer and ...Electrical and Electronic Engineering, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials, Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, SpectroscopyTijana Maksimović, Pavle Tančić, Jelena Maksimović, Dimitrije Mara, Marija Ilić, Rik Van Deun, Ljubinka Joksović, Maja Pagnacco. "Novel cerium and praseodymium doped phosphate tungsten bronzes: Synthesis, characterization, the behavior in the Briggs-Rauscher reaction and photoluminescence properties" in Optical Materials, Elsevier BV (2023). https://doi.org/10.1016/j.optmat.2023.114125 М22
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New data on Mesozoic Radiolaria of Serbia and Bosnia, and implications for the age and evolution of oceanic volcanic rocks in the Central and Northern Balkans
Valentina Vishnevskaya, Nevenka Djerić, G.S. Zakariadze. "New data on Mesozoic Radiolaria of Serbia and Bosnia, and implications for the age and evolution of oceanic volcanic rocks in the Central and Northern Balkans" in Lithos, Elsevier BV (2009). https://doi.org/10.1016/j.lithos.2008.10.015 М21
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Granitoids associated with East Vardar ophiolites (Serbia, F.Y.R. of Macedonia and northern Greece): origin, evolution and geodynamic significance inferred from major and trace element data and Sr-Nd-Pb isotopes.
Šarić Kristina, Cvetković Vladica, Romer, R.L., Christofides, G., Koroneos, A.. "Granitoids associated with East Vardar ophiolites (Serbia, F.Y.R. of Macedonia and northern Greece): origin, evolution and geodynamic significance inferred from major and trace element data and Sr-Nd-Pb isotopes." in Lithos Lithos no. 108, :Elsevier Elsevier Elsevier (2009): 131-150 M21
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Classification of some significant occurences and mineral, thermal, and thermomineral water deposits of Bosnia and Herzegovina according to V.V. Ivanov classification
Krunić Olivera, Jovanović Tomislav, Sorajić Stanko, Dokmanović Petar. "Classification of some significant occurences and mineral, thermal, and thermomineral water deposits of Bosnia and Herzegovina according to V.V. Ivanov classification" in Journal of society for development of teaching and business processes in new net environment in B&H TTM 4, Sarajevo:EBSCO Publishing (2011): 1040-1052 M23
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Kinetics, mechanism and equilibrium studies of the reactions between a ruthenium(II) сomplex and some nitrogen- and sulfur- donor nucleophiles
Mijatović Aleksandar, Jelić Ratomir, Bogojeski Jovana, Bugarčić Živadin, Petrović Biljana. "Kinetics, mechanism and equilibrium studies of the reactions between a ruthenium(II) сomplex and some nitrogen- and sulfur- donor nucleophiles" in Monatshefte für Chemie - Chemical Monthly 144 no. 897, Wien : Springer (2013): 1489-1498. https://doi.org/https://doi.org/10.1007/s00706 M22
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Devolatilization behaviour of Kolubara and Kostolac lignite (Serbia) during the combustion process: A case study
Miodrag Životić, Nenad Nikolić, Dragoslava Stojiljković, Danica Bajuk-Bogdanović, Dragana Životić (2024)In this study the devolatization behaviour of lignite samples, of various grain sizes, on a wire mesh reactor is evaluated. Lignite samples were rapidly heated at four different temperatures (300, 500, 700 and 900 ◦C). The feed lignite reveals a high content of huminite, a low inertinite and liptinite contents in the Kostolac samples and a slightly higher liptinite content in the Kolubara samples. The char obtained at 300 ◦C and 500 ◦C shows slight petrographic and chemical changes. ...Miodrag Životić, Nenad Nikolić, Dragoslava Stojiljković, Danica Bajuk-Bogdanović, Dragana Životić. "Devolatilization behaviour of Kolubara and Kostolac lignite (Serbia) during the combustion process: A case study" in International Journal of Coal Geology, Elsevier BV (2024). https://doi.org/10.1016/j.coal.2024.104641 М21а
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More than 500 Ma of magmatic and tectonic evolution of the Serbo-Macedonian Massif (south Serbia, southwest Bulgaria and east Macedonia)
Antić Milorad, Peytcheva Irena, von Quadt Albrecht, Kounov Alexandre, Trivic Branislav, Serafimovski Todor, Tasev Goran, Gerdjikov Ianko (2012)Antić Milorad, Peytcheva Irena, von Quadt Albrecht, Kounov Alexandre, Trivic Branislav, Serafimovski Todor, Tasev Goran, Gerdjikov Ianko. "More than 500 Ma of magmatic and tectonic evolution of the Serbo-Macedonian Massif (south Serbia, southwest Bulgaria and east Macedonia)" in Diversity of copper and gold deposits in the Eastern Europe Balkan, Carpathian and Rhodopean belts: tectonic, magmatic and geochronological investigations, SCOPES Project - Conference and Field Trip: Macedonia and Serbia, Štip, Macedonia: (2012) M34
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Neogene and Quaternary stratigraphy-Actual terminology and nomenclature. Book of Programme & Abstracts
Rundić Ljupko, Gaudeny Tivadar, Jovanović Mladjen (Eds.). "Neogene and Quaternary stratigraphy-Actual terminology and nomenclature. Book of Programme & Abstracts" in International Workshop on Neogene and Quaternary stratigraphy / Actual terminology and nomenclature, Belgrade, Serbia:Serbian Geological Society, Serbia (2013): 1-54 M36
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Ophiolites of the Vardar Zone and Dinarides: Central and West Serbia
Vasković Nada, Matović Vesna (2010)Vasković Nada, Matović Vesna. "Ophiolites of the Vardar Zone and Dinarides: Central and West Serbia" in Acta Mineralogica- Petrographica 24, Szeged (Hungary):Department of Mineralogy, Geochemistry and Petrology, University of Szeged (Hungary) (2010): 1-55 M51
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From ELTeC Text Collection Metadata and Named Entities to Linked-data (and Back)
In this paper we present the wikification of the ELTeC (European Literary Text Collection), developed within the COST Action ``Distant Reading for European Literary History'' (CA16204). ELTeC is a multilingual corpus of novels written in the time period 1840—1920, built to apply distant reading methods and tools to explore the European literary history. We present the pipeline that led to the production of the linked dataset, the novels’ metadata retrieval and named entity recognition, transformation, mapping and Wikidata population, ...Milica Ikonić Nešić, Ranka Stanković, Christof Schöch and Mihailo Škorić. "From ELTeC Text Collection Metadata and Named Entities to Linked-data (and Back)" in Proceedings of The 8th Workshop on Linked Data in Linguistics within the 13th Language Resources and Evaluation Conference, June 2022, Marseille, France, European Language Resources Association (2022) М33
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Investments and benefits in computer supported systems for remote monitoring and management in real time
Vujić Slobodan, Radosavljević Milinko, Miljanović Igor, Gigov Mihajlo. "Investments and benefits in computer supported systems for remote monitoring and management in real time" in Mining and Metallurgy Engineering Bor 2016 no. 1, Bor:Mining and Metallurgy Institute Bor (2016): 7-16. https://doi.org/10.5937/MMEB1601007V M24