Претрага

Упит dcterms_subject_txt:Industrial and Manufacturing Engineering

2480 items

  • 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, simulacija

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija

  • Poređenje rezultata interferometrijske analize za zemljotrese na istočnom anatolijskom rasedu od 2020. i 2023. godine

    Dragan Živković (2024)
    Ovaj rad se bavi analizom površinskih deformacija izazvanih zemljotresima u Turskoj iz 2020. i 2023. godine korišćenjem diferencijalne satelitske radarske interferometrije (DInSAR tehnike). Cilj istraživanja bio je da se kvantifikuju i uporede deformacije terena izazvane ovim seizmičkim događajima i da se razumeju mehanizmi koji stoje iza oslobađanja seizmičke energije u regionu. Analizom DInSAR snimaka, identifikovane su različite deformacije duž rasednih zona za svaki zemljotres. Dok je zemljotres iz 2020. godine (M 6,7) izazvao lokalizovane deformacije duž Istočno anatolijskog raseda, zemljotres ...
    DInSAR, Istočno anatolijski rased, Kahramanmaraški trostruki spoj

  • Keyword-Based Search on Bilingual Digital Libraries

    Ranka Stanković, Cvetana Krstev, Duško Vitas, Nikola Vulović, Olivera Kitanović (2017)
    This paper outlines the main features of Biblisha, a tool that offers various possibilities of enhancing queries submitted to large collections of aligned parallel text residing in bilingual digital library. Biblishsa supports keyword queries as an intuitive way of specifying information needs. The keyword queries initiated, in Serbian or English, can be expanded, both semantically, morphologically and in other language, using different supporting monolingual and bilingual resources. Terminological and lexical resources are of various types, such as wordnets, electronic ...
    ... Underground Mining Engineering 55 4, 381 Architecture and Urbanism 10 1, 641 BAEKTEL 3 915 INTERA 157 46, 497 Management 110 17, 426 Total 409 84, 767 For TMX document production the development environment ACIDE [7] is used, which incorporates Xalign tool for automatic sentence alignment9 and Concordancier ...
    ... synonyms, hyponyms and hypernyms. Biblǐsa also uses various domain specific bilingual dictionaries and termbases. One of dictionaries used is “Dictionary of librarianship: English-Serbian and Serbian-English” [4]. GeolISSTerm and RudOnto were developed at the Faculty of Mining and Geology, University ...
    ... semantic, morphologi- cal and semantic, semantic and English and all tree types of expansion (full). Retrieval with full expansion is assumed to have recall 1 and other results are calculated as relative to it. Manual evaluation was performed for 24 queries, half of them with Serbian and half with English initial ...

  • Low-temperature phase transition and magnetic properties of K3YbSi2O7

    Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica

  • An aproach to Implementation of blended learning in a university setting

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Jelena Prodanović (2011)

  • The state and perspective of the natural gas sector in Serbia

    Dejan Ivezić, Marija Živković, Dušan Danilović, Aleksandar Madžarević, Miloš Tanasijević (2016)
    The strategy of long-term energy development of Serbia identifies an increase of share of natural gas in final energy consumption as one of the main aims. Serbia has signed a strategic agreement with the Russian Federation on cooperation in the oil and gas sector, within which the project South Stream pipeline is planned to be realized. In addition, the Republic of Serbia has signed the Treaty that establishes the Energy Community and accepted the obligation to implement the Energy ...
    Consumption, natural gas, scenarios of development
    ... Exploration and Production. Available at: /http://www.energy-community. org/pls/portal/docs/1204188.pdfS Djajić, N. 2011. Energy of Serbia, yesterday, today, tomorrow, Academy of engineering sciences of Serbia, ISBN 978-86-87035-03-4, in Serbian Electric Power Industry of Serbia. 2011. Strategic and Development ...
    ... three different scenarios (baseline, optimistic, and pessimistic), which have been selected, developed, and analyzed. Special attention was devoted to the possibility of using natural gas in electricity production and the harmonization of electricity and natural gas energy sector. 2. Indigenous production ...
    ... 2 million m3 is transit to Bosnia and Herzegovina), and with 90% availability, the current possible annual import is approximately 3.6 billion m3 (Ivezić et al., 2012). The distributive gas network includes pipelines of medium and low pressure, as well as metering and regulation stations. In the distribution ...

  • Bezbednosna rastojanja u jamskim magacinima eksploziva u domaćoj i međunarodnoj praksi

    Luka Crnogorac, Ognjen Popović, Toma Jovičić, Veljko Lapčević (2024)
    Projektovanje jamskih magacina eksploziva predstavlja složen inženjerski problem. Sama namena jamskih magacina zahteva ispunjenost niza uslova koji se odnose na bezbedno pozicioniranje magacina, ispunjenost uslova ventilacije, pristupa, rukovođenja magacinom, načina skladištenja eksplozivnih sredstava, protivpožarne zaštite, elektro zaštite itd. Veoma važan parametar prilikom projektovanja jamskih magacina eksplozivnih sredstava predstavlja minimalno sigurnosno rastojanje između susednih komora u kojima su smeštena eksplozivna sredstva u cilju sprečavanja potencijalnog neželjenog dejstva vazdušnog udarnog talasa, razornog dejstva eksplozije i seizmičkog dejstva eksplozije. U ovom radu su prikazani ...
    jamski magacini, eksplozivi, bezbednosna rastojanja
    ... miniranju u rudarstvu, Beograd Department of Natural Resoruces, Mines and Energy of Queensland (2008) Guidance Note QGN 11 Handling Explosives in Underground Mines, Queensland, Australia BNQ (2022) Explosives - Magazines for Industrial Explosives, Bureau de normalisation du Quebec, Legal deposit - B ...
    ... effect of the explosion and the seismic effect of the explosion. This paper will present the legal framework and practice in the design of explosive magazines in the Republic of Serbia, as well as international practice and regulations. From the comparative analysis of domestic and international practice ...
    ... du Quebec, Quebec, Canada, ISBN 978-2-551- 26785-9 AASTP-I (2010) Allied Ammunition Storage and Transport Publication 1, Manual of NATO Safety Principles for the Storage of Military Ammunition and Explosive UNONDA (2021) The International Ammunition Technical Guidelines (IATG), United Nations ...

  • Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje

    Marko Lazić, Filip Miletić, Milena Lekić, Veljko Rupar, Željko Petrović, Lazar Žujović (2021)
    U radu su analizirani eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje. Period analize je prvih šest meseci tekuće godine. Analiza je vršena sa aspekta ostvarene proizvodnje, kvaliteta uglja, efektivnog vremena rada, kapacitetnog i vremenskog iskoršćenja i zastoja sistema. Za poređenje podataka različitih parametara koji po svojoj prirodi nisu međusobno uporedivi, u radu su korišćene metode višekriterijumskog odlučivanja.
    proizvodnja uglja, zastoji, metode višekriterijumskog odlučivanja

  • Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation

    Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer (2021)
    kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... of pump and engine URL: hitps:/pgp.co.id/products/Downhole_Equioment_Products.html [7] Johnson, R., 2001: Deve/opment Geology, Imperial College, London, England [8] Niladri K. mitra. Principles of arfiticial lift [9] Takacs, G., 2015. Sucker-rod Pumping handbook: Production Engineering Fundamentals ...
    ... Fundamentals and Long-Stroke Rod Pumping, University of Miskolc, Hungary [10] 4PI Technical report IIL fifth edition, Jun 2008. [11] Ahmet, T., 2000: Resevoir Engineering Handbook, Gulf Publishing, USA [12] Design Calculation for Sucker Rod Pumping Systems (Conventional Units) [13] THETA OILFIELD ...
    ... of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The second part involves an analysis and calculations using the "RODSTAR", "QRod" and "Prosper" software, which ...

  • 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

  • The Newton method for solving nonlinear equations based on aggregation operators

    Nebojša M. Ralević, Dejan Ćebić (2019)
    ... METHOD FOR SOLVING NONLINEAR EQUATIONS BASED ON AGGREGATION OPERATORS NEBOJŠA M. RALEVIĆ1, DEJAN ĆEBIĆ2 1 Faculty of Engineering, Belgrade nralevic@uns.ac.rs 2 Faculty of Mining and Geology, Belgrade, cebicd@gmail.com Abstract: A new modification of Newton’s method based on aggregation operator for ...
    ... (α) = 0 and f ′(α) 6= 0. If f (α) = f ′(α) = ...= f (k−1)(α) = 0 and f (k)(α) 6= 0 for k ≥ 1 then α is of multiplicity k. If the sequence {xn} tends to a limit α such that lim n→∞ xn+1 −α (xn −α)q =C, (2) for some C 6= 0 and q ≥ 1, then the order of convergence of the sequence {xn} is q, and C is know ...
    ... 4, 5, 11, 12]. For reasons of feasibility of the method, the authors of [8, 9] and [13] take sign( f ′(x0))G(| f ′(xn)|, | f ′(x̃n)|) and sign( f ′(x0))Mp(| f ′(xn)|, | f ′(x̃n)|) instead of G( f ′(xn), f ′(x̃n)) and Mp( f ′(xn), f ′(x̃n)) in given methods, respectively. It is easy to see that the ...

  • Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje

    Stevan Đenadić, Aleksandar Mirković, Veljko Rupar (2024)
    Proces donošenja odluka u oblasti rudarstva i geologije uslovljen je blagovremenim posedovanjem kvalitetnih podataka i informacija. Kompleksnost rudarskih procesa nalaže prikupljanje podataka na dnevnom odnosno na smenskom nivou. Podaci kao takvi bez analitičkog pristupa nisu dovoljni. Kako bi pristup podacima bio brz i efikasan neophodno je posedovanje adekvatnog digitalnog rešenja uz adekvatne centralizovane baze podataka. U ovom radu je dat pregled trenutne pozicije rudarstva sa aspekta digitalne transformacije kao i predlog jednostavnog prototipa u obliku digitalnog sistema za poslovno ...
    rudarstvo, digitalna transformacija, baze podataka
    ... 16(2), pp. 58-60. [9] Dragičević, Z. & Bošnjak, S. (2019). Digital transformation in the mining cnterprise: The cempirical study. Mining and Metallurgy Engineering Bor, (1-2), s. 73-90. 83 ...
    ... the field of mining and geology is conditioned by timely access to quality data and information. The complexity of mining processes requires data collection on a daily or shift basis. Data, as such, without an analytical approach, is insufficient. For access to data to be quick and efficient, it is ...
    ... Racing Toward a Digital Future in Metals and Mining. Boston Consulting Group. available on: https://www.bcg.com/publications/2021/adopting-a-digital-strategy-in- the-metals-and-mining-industry [4] Stolterman, E. & Fors, A.C. (2004). Information technology and the good life. Information system research ...

  • Mogućnost infracrvene termografije pri detekciji štetnih gasova

    Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2021)
    Curenje pojedinih gasova je opasnost koja može da izazove velike nezgode. Često je praćeno požarima i eksplozijama koji za posledicu mogu da imaju kako ljudske povrede, tako i štetan uticaj na ekologiju i ekonomiju. Da bi se izbegle takve situacije, preventivna inspekcija je od presudne važnosti. Curenje većine gasova se ne može uočiti golim okom a za otkrivanje i procenu stepena curenja može se koristiti tehnologija toplotnog snimanja (infracrvena termografija). U datom radu predstavljene su mogućnosti i ograničenja primene ...
    IC termografija, curenje gasa, termogram
    ... thermography and geophysical methods for defect detection in architectural structures. Engineering Failure Analysis.12, 875–892. [8] Mercuri, F., Zammit, U., Orazi, N., Paoloni, S., Marinelli, M., Scudieri, F. (2011). Active infrared thermography applied to the investigation of art and historic artefacts ...
    ... for Condition Monitoring - A Review. Infrared Physics and Technology. 60, pp. 35–55. [3] Doshvarpassanda, S., Wub, C., Wangb, C. (2019). An overview of corrosion defect characterization using active infrared thermography. Infrared Physics and Technology. 96, 366– 389. [4] Tomić, Lj., Damnjanović ...
    ... 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 as the employees' publications. - The Repository is available at: www.dr.rgf ...

  • Using technology for knowledge transfer between academia and enterprises

    Ivan Obradović, Ranka Stanković (2014)

  • 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

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending
    ... Systems and Coal Quality in Power Generation, Report CCC/186, IEA Clean Coal Centre, London, 2011 [4] Cole, R., Frank, R., Coal Quality Impacts on Power Generation, CPSA Journal, 3 (2004), 2, pp. 10-15 [5] Schimmoller, B. K., Coal and Ash Handling, in: Search of Cost Savings, Power Engineering, 107 ...
    ... operation, according to Cole and Frank [4], are ash content, ash composition, sulphur content, and moisture content. Higher ash content results in increased system throughput, increased erosion, and shortened boiler and ash handling systems. Schimmoller [5] discussed coal and ash handling in search of ...
    ... affects and influences the slagging of furnace walls and fouling of convection passes. Fouling decreases heat transfer and promotes wastage by external corrosion/erosion in the convection passes, air preheaters and the induced-draft fans. Excessive slagging blocks off the convection passes and plugs ...

  • Remontni radovi u bušotini sa dubinskom pumpom

    Jovana Milošević (2024)
    Remontni i stimulativni radovi u naftnom inženjerstvu su radovi koji se primenjuju na bušotinama koje su već u proizvodnji ili potencijalno proizvodnim bušotinama, i u zavisnosti od toga imaju različitu svrhu. Remontni radovi predstavljaju sve radove koji su ograničeni na kanal bušotine, dok se stimulativni radovi odnose pribušotinsku zonu.U prvom slučaju remontni i stimulativni radovi kod proizvodnih bušotina služe za otklanjanje problema i povećavanje proizvodnje bušotine. Dok u drugom slučaju, kod potencijalnih bušotina su ovi radovi namenjeni završnim obradama ...
    remontni radovi, hemijska obrada, Gravel Pack, alat za instrumentaciju, puške za perforaciju
    ... sa AONG: https://www.arab-oil- naturalgas.com/perforating-oil-and-gas-wells/ Perforating Oil and Gas Wells. (2020). PETROBLOGWEB. (2016). Preuzeto sa PETROLEUM ENGINEERING, SAND PRODUCTION: https://petroblogweb.wordpress.com/2016/09/03/overview-of-standalone-screensliner- sand-exclusion-options/ ...
    ... Bizjak, D. R. (2004). TEUNOLOGIJA4 BUŠENJA S4 PROJEKTOVANJEM. Novi Sad. Gabor Takacs. (2015). Sucker-Rod, Pumping Handbook, Production Engineering Fundamentals and Long-Stroke Rod Pumping. K. Hrković, R. B. (2002). 7eorijski aspekti i primena istražno-eksploatacionog bušenja, Tehnika i tehnologija ...
    ... perforation technology: Status and prospects. (2014). Preuzeto sa ResearchGate: https://www.researchgate.net/publication/270914514_Oil_well_perforation_technology_St atus_and_prospects PAŠIĆ, D. D. TEHNIKA IZRADE BUŠOTINA 1, BUŠAĆA POSTROJENJA. Perforating Oil and Gas Wells. (n.d.). Preuzeto sa ...

  • Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series

    Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)
    Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...
    deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija