Претрага

Упит dcterms_creator_txt:B. Milanović and Slobodan Petričević

2551 items

  • A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić (2023)
    This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...
    системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFIS

  • Magnetization enhancement in nanostructured random type MgFe 2O4 spinel prepared by soft mechanochemical route

    Antić Bratislav, Jović Nataša, Pavlović Miodrag B., Kremenović Aleksandar, Manojlović Dragan, Vučinić-Vasić Milica, Nikolić Aleksandar S. (2010)

  • The external aggregation Newton's method for solving nonlinear equations and applications

    Marija Paunović, Dejan Ćebić, Nebojša Ralević (2020)
    Њутнов метод, агрегациона функција, ред конвергенције

  • Ograničenja primene optimizacionih algoritama u slučaju kopova

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Petar Marković, Dejan Ranković (2020)
    Proces optimizacije površinskih kopova, kao sastavni deo strateškog planiranja, veoma je važan sa stanovišta ostvarivanja maksimalnih efekata proizvodnje. To je složen zadatak koji vrlo često podleže vrlo strogim geometrijskim i drugim praktičnim rudarskim ograničenjima. Ova ograničenja u posebno su izražena na površinskim kopovima uglja, te u značajnoj meri mogu povećati stepen neizvesnosti rudarskog projekta, odnosno izazvati neželjena dejstva u pogledu profitabilnosti poslovanja. Iz tog razloga, veoma je važna primena savremenih optimizacionih alata, koji u značajnoj meri mogu olakšati celokupan ...
    ... iju Beograd ISBN: 978-86-83497-26-3, 2019 Banković M., Stevanović D., Pešić M., Tomašević A. & Kolonja B.: Improving Efficiency of Thermal Power Plants Through Mine Coal Quality Planning and Control. Thermal Science, 22(1B), pp.721-733, 2017 Benndorf J.: Investigating the variability of key coal ...
    ... Београду омогућава приступ издањима Факултета и радовима запослених доступним у слободном 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 ...
    ... efficiency of production. It is a complex task that is very often subject to very strict geometric and other practical mining restrictions. These limitations are particularly pronounced in open pit coal mines, and can significantly increase the degree of uncertainty of the mining project, or cause side ...

  • Речник САНУ као база терминолошких речника (на примеру речника кулинарства)

    Рада Стијовић, Олга Сабо, Ранка Станковић (2017)
    ... Београду омогућава приступ издањима Факултета и радовима запослених доступним у слободном 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 ...
    ... 115-130. 6. Ranka Stanković, Cvetana Krstev, Ivan Obradović, Biljana Lazić and Aleksandra Trtovac. „Rule based automatic multi-word term extraction and lemmatization.” In: 10th edition of the Language Resources and Evaluation Conference (LREC), 23-28 May 2016, Portorož. 7. Ranka Stanković, Ivan ...
    ... Dictionary and show how traditional vocabulary during the digitization process becomes a base for terminology dictionaries that allows different uses. In addition, the process of digitalization and modernization of work on the SASA Dictionary provide its enrichment with the new, modern lexica and new ...

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... ballet schools and 2 Chapter # - will be assigend by editors d) Primary schools for students with developmental disorders; Secondary schools: a) Gymnasiums (general and specialized), b) Secondary vocational schools (SVS), c) Mixed or combined schools (gymnasiums and vocational or ...
    ... for the adult education and f) Secondary schools for students with developmental disorders or disabilities; Tertiary education institutions: a) Universities, b) Faculties and art academies within universities, c) Academies of Professional Studies, d) Colleges and e) The Colleges of Pr ...
    ... 1.Pre-school education and upbringing; 2.Primary education and upbringing; 3.Secondary education; 4.Tertiary education. These levels of education are carried out in: Preschool institutions (up to 7 years of age); Primary schools: a) Regular primary schools, b) Primary schools for the ...

  • On the distribution modulo 1 of the sum of powers of a Salem number

    Dragan Stankov (2016)
    It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • A WebGIS Decision Support System for Management of Abandoned Mines

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)
    ... on and representation in appropriate databases. From the legislative and legal point of view two subgroups can be distinguished within the first group, namely: (a) abandoned mines with legal deposits, for which geological research projects, studies on reserves and mining projects exist; and (b) abandoned ...
    ... (a) the physical degradation of the surface, relief and environment that took place, especially in the case of improper and unplanned exploitation; (b) the impact of mineral substances present in the exploited deposits on environmental features; and (c) the impact of various municipal waste materials ...
    ... projects and plans with contradictory solutions; (b) funds savings for the work on remediation and reclamation at the expense of the state, by resolution of ownership issues related to the land in question; (c) realistic planning of the necessary financial resources for remediation and reclamation ...

  • Towards Semantic Interoperability: Parallel Corpora as Linked Data Incorporating Named Entity Linking

    Ranka Stanković, Milica Ikonić Nešić, Olja Perisic, Mihailo Škorić, Olivera Kitanović (2024)
    U radu se prikazuju rezultati istraživanja vezanih za pripremu paralelnih korpusa, fokusirajući se na transformaciju u RDF grafove koristeći NLP Interchange Format (NIF) za lingvističku anotaciju. Pružamo pregled paralelnog korpusa koji je korišćen u ovom studijskom slučaju, kao i proces označavanja delova govora, lematizacije i prepoznavanja imenovanih entiteta (NER). Zatim opisujemo povezivanje imenovanih entiteta (NEL), konverziju podataka u RDF, i uključivanje NIF anotacija. Proizvedene NIF datoteke su evaluirane kroz istraživanje triplestore-a korišćenjem SPARQL upita. Na kraju, razmatra se povezivanje Linked ...
    paralelni korpusi, povezivanje imenovanih entiteta, prepoznavanje imenovanih entiteta, NER, NEL, povezani podaci, NIF, Vikipodaci

  • The ‘Umka’ landslide

    Uroš Đurić, Dragana Đurić, Miloš Marjanović, Biljana Abolmasov, Ivana Vasiljević (2024)
    We present an in-depth landslide map of the ‘Umka’ landslide near Belgrade, Serbia, at a scale of 1:5000. The map delineates elements at risk, primarily buildings and road infrastructure impacted by the landslide displacements of several cm per year, introduced during frequent reactivation stages. The Main map results from a survey of over 350 buildings and more than 7 km of state and local roads. The acquisition techniques included engineering geological field mapping, building survey, and visual interpretation of ...
    rizik od klizišta, elementi rizika, kartiranje pomoću drona, ispitivanje objekata, geotehnički monitoring

  • Stratigraphy and microfossils (radiolarians and planktonic foraminifers) of the Upper Cretaceous (upper Santonian–lower Campanian) Struganik limestone (Western Serbia)

    Liubov G. Bragina, Nikita Yu. Bragin, Ludmila F. Kopayevich, Nevenka Đerić, Nataša Gerzina Spajić (2019)
    Paleontology, Stratigraphy, Ecology, Evolution, Behavior and Systematics

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • Multi-word Expressions for Abusive Speech Detection in Serbian

    Ranka Stanković, Jelena Mitrović, Danka Jokić, Cvetana Krstev (2020)
    Ovaj rad predstavlja istraživanja na usavršavanju i unapređenju srpske verzije rečnika Hurtlex, višejezičnog leksikona uvredljivih reči. Posebnu pažnju posvećujemo dodavanju izraza sa više reči (polileksemskih jedinica) koji se mogu smatrati uvredljivim, jer su takvi leksički zapisi veoma važni za postizanje dobrih rezultata u mnoštvu zadataka otkrivanja uvredljivog jezika. Srpski morfološki rečnici se koriste kao osnova za čišćenje podataka i stvaranje rečnika. Istaknuta je veza sa drugim leksičkim i semantičkim resursima na srpskom jeziku i predviđena je izgradnja sistema za ...
    uvredljiv govor, govor mržnje, leksički izvori, višejezični leksikon, izrazi sa više reči
    ... Krstev, Biljana Lazić, and Mihailo Škorić. 2018. Electronic dictionaries-from file system to lemon based lexical database. In Proceedings of the 6th Workshop on Linked Data in Linguistics (LDL-2018) (clocated with LREC 2018), McCrae, JP, C. Chiarcos, T. Declerck, J. Gracia and B. Klimek, pages 48–56. ...
    ... Workshop on Multiword Expressions and Electronic Lexicons | 2020 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005015 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду омогућава приступ издањима Факултета и радовима запослених доступним у слободном приступу. - Претрага репозиторијума ...
    ... racial, national, and religious hate speech detection adopted by Gitari et al. (2015) was based solely on the usage of lexicon and rules. They used semantics and subjectivity features – polarity, intensity, and subjectivity level of words, using the domain corpus of hateful content and Subjectivity lexicon ...

  • Značaj geografske širine za lociranje uzročnika magnetnih anomalija kod prospekcije arheoloških lokaliteta

    Vesna Cvetkov (2020)
    ... tibility of the soil and its significance in soil science-a review. European Journal of Soil Science 28, 2: 223-246. Mušič, B. 1999. Geophysical prospe- cting in Slovenia: an overview with some observatons related to the natu- ral environment. Arheološki vestnik 50: 349-405. Mušič, B. 2008. Nastavki ...
    ... Geophysical Survey in Archaeo- logical Field Evaluation, London: 1-60. Dalan, R. A., Bevan, B. W., Goodman, G., Lynch, D., De Vore, S., Adamek, S., Martin,T., Holley, G., Michlo- vic, M. 2001. The Measurement and Analysis of Depth in Archaeological Geophysics: Tests at the Biesterfeldt Site, USA. ...
    ... N., Papazachos, C. B. Loucoyannakis, M. Z., Karousova, O. 1991. Geophysical data from archa- eological sites: Inversion filters based on the verticalsited finite prism model. Archaeometry 33: 215-230. Tsokas, G. N., Hansen, R. O., 2000. On the use of complex attributes and the inferred source ...

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... authors (Sučić 1961; An- tonijević et al. 1970; Grubić and Jankićević 1973; Andj- elković 1975a, b, c; Mojsilović et al. 1978; Kalenić et al. 1980; Sudar 1982, 1985, 1986, 1996; Dimitrijević and Dimitrijević 1986, 1906; Andjelković and Sudar 1990; Matović 2009; Gajić et al. 2011; Sudar et al ...
    ... technical requirements neces- sary for a suitable reference of natural stone products. The V. Matović (b+) Department of Mineralogy, Crystallography, Petrology and Geochemistry, Faculty of Mining and Geology, University of Belgrade, Djusina 7, Belgrade, Serbia e-mail: vesna.matovic('rgf.bg.ac.rs ...
    ... Hungary_7~ ~ Croatia~ _ BOg Belgrade * Romania • |d} SERBIA i Montenegro B@llgaria ) albania/ ,7 a 2, Macedonia Fig. 1 Map of Serbia and the location of quarries of investigated limestone: a Klisura; b Skrzut; c Struganik; d Tisnica analysis, indicates that these sediments are of Campanian ...

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... products type Ca - aluminate and sulfoaluminata. In samples with 4 and 6 % of the cement, traces of gypsum occurred (Fig. 3a, 3b, 3c). Figure 3 The X-ray diagram of the sample exposed to 7 days in a humid environment with the addition of cement binder: a) 6%, b) 4%, c) 2% 3.2.4 The sample ...
    ... transformation in the second phase, and most of the calcite (Fig. 2a, 2b, 2c). Figure 2 The X-ray diagram of the sample, which is exposed for 7 days in a humid environment with the addition of lime binders: a) 6 %, b) 4 %, c) 2 % M. Šešlija i dr. ...
    ... formation of new products due to the presence of weak and poorly defined peaks at low angles (Fig. 6a, 6b, 6c). Figure 6 The X-ray diagram of the sample, exposed for 28 days in a humid environment with the addition of cement binder: a) 6 %, b) 4 %, c) 2 % 3.3 Mineral composition of fly ash ...

  • Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles

    Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)
    Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...
    Kinetika, Ravnoteža, Ru(II), L-Histidin, Guanozin-5' -monofosfat, Dimetilsulfoksid, Tiourea
    ... 9:5810 44. Bratsos I, Serli B, Zangrando E, Katsaros N, Alessio E (2007) Inorg Chem 46:975 45. Ashby MT (1990) Comments Inorg Chem 10:297 46. Murray SG, Hartley FR (1981) Chem Rev 81:365 47. Pearson RG (1973) In: Hard and soft acids and bases. Dowden, Hutchinson and Ross, Stroudsburg, PA 48. V ...
    ... protonation of the ligand anion, (b) hydrolysis of the [Ru(trpy)(bpy)H2O] 2? ion, and (c) general three-component equilibria, which include the case q = 0, i.e., the formation of pure binary complexes of [Ru(trpy)(bpy)H2O] 2?. The overall protonation constants of 50-GMP and L-His anion were taken from ...
    ... equilibria (c), the binary models (a) and (b) were consid- ered as known. The concentration stability constants of the complexes, bp,q,r were calculated with the aid of the suite of computer programs Hyperquad 2006 [50]. In Hyperquad calculations, the identity and stability of complexes that give the ...

  • 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

  • Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković (2019)
    Hidraulični bageri primenjuju se u različitim oblastima privrede a najzastupljeniji su u građevinarstvu i rudarstvu. Na površinskim kopovima sa kontinualnim sistemima, klasifikuju kao pomoćna mehanizacija a na površinskim kopovima sa diskontinualnim sistemima, kao osnovna mehanizacija. Kako je u oba slučaja njihova primena neizostavna, važno je izvršiti adekvatnu analizu postojećih podataka, u cilju optimizacije izbora tipa hidrauličnog bagera u odnosu na uslove rada datog površinskog kopa. U radu su opisane različite višekriterijumske metode koje su korišćene za analizu hidrauličnih bagera. ...
    višekriterijumske metode, površinski kop uglja, pomoćna mehanizacija, hidraulični bager
    ... Održavanje rudarskih mašina, Beograd, Rudarsko-geološki fakultet, 2014. [7] Behzadian M, Kazemzadeh R B, Albadavi A & Aghdasi M, PROMETHEE: A comprehensive litera- ture review on methodologies and application, Euro- pean Journal of Operational Research, 200, pp. 198- 215, DOI:10.1016/j.ejor.2009.01 ...
    ... Београду омогућава приступ издањима Факултета и радовима запослених доступним у слободном 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 ...
    ... metode zasni- va se na uvođenju funkcije preference P (a, b) za alter- native a i b koje su vrednovane kriterijumskim funk- cijama (označimo jednu od njih sa f). Ako je alternativa a bolja od alternative b, prema kriterijumu f : f (a) > f (b). Funkcija preference se definiše na sledeći način: 0, ...

  • Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases

    Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić (2021)
    Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...
    Šifove baze, Lipofilnost, RP-TLC, Organski modifikatori