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529 items

  • Indeksi kontrole održavanja i korišćenja rotornog bagera

    Jovana Mitrović, Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić (2023)
    Razvoj površinske eksploatacije se u velikom stepenu zasniva na svestranoj mehanizaciji rudarskih radova. Kako bi se zadovoljili potrebni kapaciteti, neophodna je primena savremene mehanizacije, velikih kapaciteta i pouzdanosti u radu. Naime, sa stepenom povećanja mehanizovanosti radova smanjuje se broj zaposlenih radnika, povećava produktivnost rada, smanjuju troškovi po jedinici proizvoda, a samim tim i povećava ekonomičnost površinske eksploatacije. Predmet istraživanja su rotorni bageri SRs 1200 koji predstavljaju samohodne mašine kontinuiranog dejstva namenjene za otkopavanje jalovine i korisne supstance na površinskim ...
    rudarstvo, rotorni bager, indeksi održavanja, indeksi korišćenja, TOPSIS

  • Geotechnical conditions of “Debelo brdo” tunnel construction on the highway E-80: Nis-Merdare-Pristina (“Peace Highway”)

    Dragoslav Rakić, Irena Basarić Ikodinović, Radojica Lapčević, Dragan Lukić (2024)
    The construction of the highway E-80 has begun in Serbia, which will represent the traffic hub of the Western Balkans and will be part of the main regional transport network of Southeast Europe. Its total length through Serbia is 77 km, and one part of the route is designed through a typical plain terrain, while a larger part of the route passes through hilly terrain. The construction of the tunnel “Debelo brdo” is planned partly in an open cut ...
    „Debelo brdo“ tunnel, temporary slopes, open cut excavation, tunnel excavation, piles

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... function networks and fuzzy inference systems, IEEE, Transactions on Neural Networks, 4(1),1993, 156-159. 119. Kandel, A., Fuzzy expert systems, CRC Press, Inc, Boca Raton, FL, 1992. 120. Kosko, B., Neural networks and fuzzy systems: a dynamical systems approach, Prentice Hall, Upper Saddle ...
    ... Lee, C.-C., Fuzzy logic in control systems: fuzzy logic controller - part1, IEEE Transactions on Systems, Man, and Cybernetics, 20(2), 1990, 404-418. 123. Lee, C.-C., Fuzzy logic in control systems: fuzzy logic controller - part2, IEEE Transactions on Systems, Man, and Cybernetics, 20(2), 1990 ...
    ... 1982. 67. Veletsos, A.S., Newmark, N.M., Design Procedures for Shock Isolation Systems of Underground Protective Structures, Volume III; Response Spectra of Single Degree-of- Freedom Elastic and Inelastic Systems, Air Force Weapons Laboratory Technical Documentary Report RTD TDR-63-3096 AD44 ...

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... function networks and fuzzy inference systems, IEEE, Transactions on Neural Networks, 4(1),1993, 156-159. 119. Kandel, A., Fuzzy expert systems, CRC Press, Inc, Boca Raton, FL, 1992. 120. Kosko, B., Neural networks and fuzzy systems: a dynamical systems approach, Prentice Hall, Upper Saddle ...
    ... Lee, C.-C., Fuzzy logic in control systems: fuzzy logic controller - part1, IEEE Transactions on Systems, Man, and Cybernetics, 20(2), 1990, 404-418. 123. Lee, C.-C., Fuzzy logic in control systems: fuzzy logic controller - part2, IEEE Transactions on Systems, Man, and Cybernetics, 20(2), 1990 ...
    ... 1982. 67. Veletsos, A.S., Newmark, N.M., Design Procedures for Shock Isolation Systems of Underground Protective Structures, Volume III; Response Spectra of Single Degree-of- Freedom Elastic and Inelastic Systems, Air Force Weapons Laboratory Technical Documentary Report RTD TDR-63-3096 AD44 ...

  • Multivarijabilni modeli upravljanja u rudarstvu

    Marjan M. Hudej (2014-02-03)
    osetljivost i rizik. Više pobuda generiše ovakvu atribuciju. Prva je, multivarijabilnostambijentalnih uslova i funkcionalna i strukturna složenost rudarskih sistema (čovek -priroda (radna sredina) - mašina – okruženje); Druga se odnosi na ne postojanje opštenaučne saglasnosti oko ocene pogodnosti modela za podršku odlučivanju i upravljanje.Treća, ako bi saglasnost i postojala, nije sigurno da bi raspoloživi modeli, metode i taktike,dale ekvivalentne rezultate za iste rudničke uslove. Četvrta, sistemske nauke još uveknemaju opšte prihvaćen i u praksi primenljiv algoritam izbora najboljeg rešenja ...
    rudarstvo, odlučivanje, upravljanje, model,multivarijabilno, multiatributno, multikriterijumsko
    ... for such attribution. The first is multi-variability of environmental conditions and the functional and structural complexity of mining production systems (Human – nature (working environment) – machine – narrower and wider environment). The second is related to the non-existing scientific consensus ...
    ... UNCERTAIN INFORMATION / PROŠIRENJE TOPSIS-a ZA ODREĐIVANJE TEŽINA DODONIOCA ODLUKE U RPOBLEMU GRUPNOG ODLUČIVANJA SA NEIZVESNIM INFORMACIJAMA, Expert Systems with Applications, Vol. 39, No. 7, 2012, 6343–6350. U radu se polazi od konstatacije da je definisanje relativnog značaja svake odluke veoma važno ...
    ... UPRAVLJANJE INFORMACIJAMA O INCIDENTU BAZIRAN NA INTEGRACIJI PODATAKA, RUDARENJU PODATAKA I MULTIKRITERIJUMSKOM ODLUČIVANJU, Decision Support Systems, Vol. 51, No. 2, May 2011, 316–327. Prema autorima incidentni menadžment u harmoniji sa nekoliko izazova treba da omogući efikasno upravljanje i ...

  • Multivarijabilni modeli upravljanja u rudarstvu

    Marjan M. Hudej (2014-02-03)
    osetljivost i rizik. Više pobuda generiše ovakvu atribuciju. Prva je, multivarijabilnostambijentalnih uslova i funkcionalna i strukturna složenost rudarskih sistema (čovek -priroda (radna sredina) - mašina – okruženje); Druga se odnosi na ne postojanje opštenaučne saglasnosti oko ocene pogodnosti modela za podršku odlučivanju i upravljanje.Treća, ako bi saglasnost i postojala, nije sigurno da bi raspoloživi modeli, metode i taktike,dale ekvivalentne rezultate za iste rudničke uslove. Četvrta, sistemske nauke još uveknemaju opšte prihvaćen i u praksi primenljiv algoritam izbora najboljeg rešenja ...
    rudarstvo, odlučivanje, upravljanje, model,multivarijabilno, multiatributno, multikriterijumsko
    ... for such attribution. The first is multi-variability of environmental conditions and the functional and structural complexity of mining production systems (Human – nature (working environment) – machine – narrower and wider environment). The second is related to the non-existing scientific consensus ...
    ... UNCERTAIN INFORMATION / PROŠIRENJE TOPSIS-a ZA ODREĐIVANJE TEŽINA DODONIOCA ODLUKE U RPOBLEMU GRUPNOG ODLUČIVANJA SA NEIZVESNIM INFORMACIJAMA, Expert Systems with Applications, Vol. 39, No. 7, 2012, 6343–6350. U radu se polazi od konstatacije da je definisanje relativnog značaja svake odluke veoma važno ...
    ... UPRAVLJANJE INFORMACIJAMA O INCIDENTU BAZIRAN NA INTEGRACIJI PODATAKA, RUDARENJU PODATAKA I MULTIKRITERIJUMSKOM ODLUČIVANJU, Decision Support Systems, Vol. 51, No. 2, May 2011, 316–327. Prema autorima incidentni menadžment u harmoniji sa nekoliko izazova treba da omogući efikasno upravljanje i ...

  • 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
    ... ion systems in the surface mine planning function. Mirjana V. Banković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Optimizacija utovarno-transportnih sistema u funkciji planiranja površinskog kopa;Optimization of excavation-transportation systems in the ...
    ... approach and optimization model of planning process with special emphasis on the optimization of the mining excavation and transport systems, bearing in mind that these systems on the surface mines generate over 50% of the total cost of exploitation. The results of the research through the case study showed ...
    ... UNIVERSITY OF BELGRADE FACULTY OF MINING AND GEOLOGY Mirjana V. Banković OPTIMIZATION OF EXCAVATION- TRANSPORTATION SYSTEMS IN THE SURFACE MINE PLANNING FUNCTION Doctoral Dissertation Belgrade, 2018 Mentor: Prof. dr Božo ...

  • Softverski alati za korišćenje resursa za srpski jezik

    Ivan Obradović, Ranka Stanković (2008)
    ... the Unitex2 and Nooj3 system were developed, both allowing processing in Unicode, and sub- sequently started to suppress Intex. Although all three systems enable text processing based on dictionaries in LADL format, none of them of- fered possibilities for management of the content of the dictionaries ...
    ... dictionaries are easier to manage. Besides, and which is more important, the usage of all dictionaries during text processing using the Intex/Unitex systems is not always necessary, and sometimes even advis- able. The most important feature of the dictionary management module is the possibility of very ...

  • SrpELTeC: A Serbian Literary Corpus for Distant Reading

    Ranka Stanković, Cvetana Krstev, Duško Vitas (2024)
    U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...
    digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analytics

  • Analiza rada električnih centrifugalnih pumpi

    Milica Stanojević (2024)
    Ovaj rad analizira rad električne centrifugalne pumpe (ESP) u naftnoj industriji, sa fokusom na problem taloženja kamenca (karbonatnih naslaga) unutar sistema. Električne centrifugalne pumpe (ESP) predstavljaju srce mnogih naftnih bušotina. Njihova visoka pouzdanost i sposobnost rada u zahtevnim uslovima čine ih neophodnim za stabilnu i kontinuiranu proizvodnju.Senzori igraju ključnu ulogu u praćenju rada ESP sistema i detekciji ranih znakova taloženja kamenca. Problem taloženja kamenca je izuzetno značajan, jer može dovesti do smanjenja efikasnosti pumpe, povećanja troškova održavanja, i dugoročnih zastoja ...
    električne centrifugalne pumpe (ESP), formiranje kamenca (karbonatnih naslaga), hemijski inhibitori
    ... -e-ii 7. ChampionX , nd. URL: https:/www.championx.com/products-and- solutions/artificial-lift-technologies/electrical-submersible-pumping- systems/esp-surface-controls/ 8. Bafghi, M., Vahedi, A., 2018., „4 Comparison of Electric Motors for Flectrical Submersible Pumps Used in the Oil and Gas ...
    ... https://www.google.rs/books/edition/SCADA_Security/P- EJEAAAQBAJ?hI=sr&gbpv=1 &dq=scada&printsec=frontcover 23. Krutz, R., 2006. „Securing Scada Systems “. 24. Đorđević, M., 2022. „Zaštita od kamenca “ — NIS. 25.Gargoum, L., 2018. „Calcium Carbonate Scale Formation under Multiphase Turbulent ...

  • Developing Termbases for Expert Terminology under the TBX Standard

    https://dr.rgf.bg.ac.rs/s/repo/item-set/522 (2014)
    ... termbases. Keywords: Termbases, TBX standard, Language Resources, Terminol- ogy Integration and Portability 1 Introduction Translation memory (TM) systems have been the major language technology to support the translation and localization industries for the last two decades [11]. Their essential components ...
    ... Lexicon Interchange Format (OLIF), used in a variety of natural language processing applications and general language technology environments (e.g., TM systems) [9]. Termbases developed at FMG followed the principle that terminology, as ev- ery other theory, should have an applied side from which applications ...
    ... purposes, termbases developed at FMG are thus used for control of domain values, classi- fication and search within mining and geological software systems. 2.1 GeolISSTerm A publicly available bilingual terminological resource, GeolISSTerm (http:// geoliss.mprrpp.gov.rs/term/), was developed at FMG ...

  • Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept

    Uroš Đurić, Miloš Marjanović, Zoran Radić, Biljana Abolmasov (2019)
    Improvements of Machine Learning-based landslide prediction models can be made by optimizing scale, customizing training samples to provide sets with the best examples, feature selection, etc. Herein, a novel approach, named Cross-Scaling, is proposed that includes the mixing of training and testing set resolutions. Hypothetically, training on a coarser resolution dataset and testing the model on a finer resolution should help the algorithm to better generalize ambiguous examples of landslide classes and yield fewer over/underestimations in the model. This ...
    klizišta, podložnost, mašinsko učenje

  • Data from the Digital Repository of the Faculty of Mining and Geology in eScience (eNauka)

    Biljana Rujević, Mihailo Škorić (2024)
    The paper describes linking the Digital Repository of the University of Belgrade, Faculty of Mining and Geology, with the eScience system in terms of transferring metadata about the results of researchers' scientific work. The steps taken to ensure a smooth harvesting of metadata are outlined. Additionally, a presentation of additional improvements to the OAI system is provided, aiming to contribute to the automatic linking of authors with their results in the eScience system.
    репозиторијуми, еНаука, метаподаци, Рударско-геолошки факултет

  • Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)

    Miloš Radonjić (2020)
    This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...
    Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides
    ... recon- struction of the hinterland area of the system which is also lacking at present. Although the framework of the Devonian/Carbonifer- ous flysch systems of SE Europe was developed and compared at regional scales (EBNER et al., 2008; VOZÁROVÁ et al., 2009), local studies in the Carpatho-Balkanides ...
    ... continental environments and deep-marine realms. Further studi es could provide more information on palaeoenvironmental condi- tions and sedimentary systems of the studied Kučaj-Zvonce flysch and similar depositional settings (see SREMAC, 2012; FAN & GONG, 2016). Contemporaneous equivalent formations ...

  • A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment

    Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others (2020)
    Aligning senses across resources and languages is a challenging task with beneficial applications in the field of natural language processing and electronic lexicography. In this paper, we describe our efforts in manually aligning monolingual dictionaries. The alignment is carried out at sense-level for various resources in 15 languages. Moreover, senses are annotated with possible semantic relationships such as broadness, narrowness, relatedness, and equivalence. In comparison to previous datasets for this task, this dataset covers a wide range of languages ...
    lexical semantic resources, sense alignment, lexicography, language resource
    ... , 7(1- 2):147–161. Kwong, O. Y. (1998). Aligning WordNet with additional lexical resources. Usage of WordNet in Natural Lan- guage Processing Systems. Lenci, A., Bel, N., Busa, F., Calzolari, N., Gola, E., Mona- chini, M., Ogonowski, A., Peters, I., Peters, W., Ruimy, N., et al. (2000). SIMPLE: ...
    ... Joint Confer- ence on Artificial Intelligence. Ponzetto, S. P. and Navigli, R. (2010). Knowledge-rich word sense disambiguation rivaling supervised systems. In Proceedings of the 48th annual meeting of the asso- ciation for computational linguistics, pages 1522–1531. Association for Computational L ...

  • 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
    ... geometrical criteria (Siedal et al. 2011). In the attempt to harmonize classification approaches and overcome termi- nology problems, various systems have been established (Normal 1/88 1990, VDI 3798 1998, ICOMOS-ISCS 2008). Glossaries on stone deterioration patterns allow qualitative assessment ...
    ... report of an 18-year review of brethane-treated sites. In: Fidler J (ed) Stone: stone building materials, construction, and associated component systems: their decay and treatment, english heritage research transactions. 2. James & James, London, pp 3-18 6193 Massa S, Naldini S, Rorro A (1991) ...

  • Bilingual lexical extraction based on word alignment for improving corpus search

    Jelena Andonovski, Branislava Šandrih, Olivera Kitanović (2019)
    Library and Information Sciences,Computer Science Applications

  • Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима

    Radiša D. Đurić (2016-05-30)
    Оцена расположивости представља основну компоненту уинжењерском управљању опремом. Расположивост је свеобухватни концепткоји представља меру употребног квалитета техничких система, који садржичитаву серију парцијалних индикатора који се односе на време у раду ивреме у отказу система као и на његову функционалну погодност. Овадисертација даје структурну анализу парцијалних индикатора као и развојмодела њихове синтезе на ниво расположивости. Поменути подаци имајухибридни карактер (измерени и експертски добијени) и њихова интеграцијаи синтеза је остварена коришћењем фази пропозиције и фази закључивања.Овакав приступ омогућава оцену техничког система ...
    управљање опремом, инжењерство одржавања,расположивост, фази закључивање, прикупљање података, булдозер
    ... based optimal preventive maintenance policy of series-parallel systems. Eksploatacja i Niezawodnosc – Maintenance and Reliability; 42(2): 4-7 Jaarsveld, W.V., Dekker, R., 2011. Spare parts stock control for redundant systems using reliability centered maintenance data. Reliability Engineering ...
    ... ity Evaluation for Multi-hierarchical Systems Based on Max–Min Composition, Quality and Reliability Engineering International, 29(3), 317–326 Cai, K.Y., 1996. System failure engineering and fuzzy methodology An introductory overview. Fuzzy Sets and Systems, 83(2), 113-133 Bowles, J.B., Pelaez ...
    ... Liao, S.H., 2011. Expert system methodologies and applications-a decade review from 1995 to 2004, Expert Systems with Applications, 28(1), 93-103 Liebowitz, J., 1988. Introduction to Expert Systems, Mitchell Publishing/McGraw Hill, Watsonsville, CA http://www.scopus.com/authid/detail.url?authorI ...

  • Coal homogenization stockyard sizing “Tamnava – Zapad” case study

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)
    ... Engineers of Turkey. 6. Robinson, G.K., 2004. How much would a blending stockpile reduce variation?. Chemometrics and intelligent laboratory systems, 74(1), pp.121-133. 7. Statsenko, L. and Melkoumian, N.S., 2014. Modeling Blending Process at Open-Pit Stockyards: A Northern Kazakhstan Mining ...

  • GNSS Time Series as a Tool for Seismic Activity Analysis Related to Infrastructure Utilities

    Sanja Tucikešić, Ankica Milinković, Branko Božić, Ivana Vasiljević, Mladen Slijepčević (2021)
    GNSS, Time series, Seismic deformations, Earthquake, Infrastructure utilities