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4964 items

  • Modeliranje disperzije dimnih gasova iz termoelektrane ,, Nikola Tesla”

    Milica Kostić (2024)
    Termoelektrane na ugalj, iako značajan izvor električne energije, predstavljaju veliki izazov zbog zagađenja koje uzrokuju. Glavni uzrok zagađenja je neumerena ljudska potreba za energijom i resursima, što dovodi do emisije različitih zagađivača u atmosferu, uključujući okside ugljenika, sumpora, azota, kao i lebdeće čestice i toksine. Ove emisije imaju negativan uticaj na kvalitet vazduha, zdravlje ljudi i životnu sredinu. Procena uticaja termoelektrana na ugalj na životnu sredinu je zakonska obaveza i ključna za smanjenje tih negativnih efekata. Ovaj dokument analizira potencijalne ...
    zaštita životne sredine, termolektrana ,,Nikola Tesla A”, modeliranje, zagađenje vazduha
    ... vrednosti) 1. januara 2013. godine, s tim da se granica tolerancije od 1. januara 2015. godine i svakih 12 meseci nakon toga smanjuje na jednake godišnje postotke da bi se do 1. 150 ug/m?* (43% od granične vrednosti) 1. januara 2013. godine, s tim da se granica tolerancije od 1. januara 2015 ...
    ... do 1. 75 ag/mš (50 % od granične vrednosti) 1. januara 2013. godine, stim da se granica tolerancije od 1. januara 2015. godine i svakih 12 meseci nakon toga smanjuje na jednake godišnje postotke da bi se do 1. januara 2021. godine došlo do 0%) 25 ug/mš (50 % od granične vrednosti) 1. ...
    ... do 1.januara 2021. godine došlo do 0%) 75 ug/mš Kalendarska godina 40 ug/mš 5 ug/m*? (20 % od granične vrednosti) 1. januara 2013. godine, s tim da se granica tolerancije od 1. januara 2015. godine i svakih 12 meseci nakon toga smanjuje na jednake godišnje postotke da bi se do 1.januara ...

  • Strain Partitioning Around an Indenter During Oroclinal Bending: Inferences From Field Kinematic Study And Analogue Modeling with Application to the European Carpatho-Balkanides Orogen

    Nemanja Krstekanić, Liviu Matenco, Ernst Willingshofer, Marinko Toljić, Uroš Stojadinović (2021)

  • Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić (2019)
    We have developed a technique to calculate lateral density distribution of the sedimentary basin basement by combining linear gravity–density inversion and 2D forward modeling. The procedure requires gravity anomaly data, depth-to-basement data and density data for the sediments (density–depth distribution). Gravity efect of density variations in the basement was extracted from the total gravity anomaly by removing the joint efect of the sediments with vertical density variations and homogeneous basement of average density contrast (calculated by 2D modeling). Gravity ...
    funkcije raspodele gustine, lateralna raspodela gustine, karta gustine podloge

  • 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 energije
    ... M M M F F F M M M e x y z x y z x y z x y z T  1 1 1 1 1 1 2 2 2 2 2 2 . (5.3) Matrica masa bez momenata inercije nosivosti glasi:             112 1 3 1 3 1 3 1 3 10101 0 0 0 1 1 1 0 0 0 1 1 2 ALρ dijag 2 m dijagm e  . ...
    ... )1(/)2( ),1(/)4( ),1(/6c ),1(/12b ),1(/)2( ),1(/)4( ),1(/6c ),1(/12b ,/ EA/L,=a z2 y2 x2 2 2 2 z1 y1 x1 1 1 1 z2y2x2222z2y2x2222z1y1x1111 22211211 2 z 3 z 2 y 3 y        ...
    ... Posle transformacija i sreĊivanja dobijamo: 𝐿č(𝑠𝑟) = 𝑏 𝜑𝑢𝑣 1− 𝑟𝑅𝑘 + 𝑟 1 − 1𝑐𝑜𝑠𝜑𝜑𝑢 (3.59) Ako se oznaĉi sa: 𝑘č = 𝜑𝑢𝑣 1 − 𝑟𝑅𝑘 + 𝑟 1 − 1𝑐𝑜𝑠𝜑𝜑𝑢 ...

  • Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2017)
    Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...
    ... o r P r o o f 12 R. Stanković et al. (e) lnu = (ltf/(1 + log(avg tf)))/((1 − s) + s · (no uw)), with the constant value s = 0.25, (f) w inquery = 0.4 + 0.6 · (b · H inquery + (1 − b) · ntf) · nidf , b = 0.5, (g) w okapi = (k1 + 1) · tf/(K okapi + tf). In the search stage the similarity of the ...
    ... text in the number of simple words, (e) normalized term frequency ntf = log(tf + 0.5)/ log(max tf + 1), (f) H inquery = (max tf ≤ 200 ? 1 : 200/max tf), penalty for long documents, (g) K okapi = k1 · ((1 − k2) + k2 · li/avg dl) where avg dl is the average document length, k1 = 1.2, k2 = 0.75 length ...
    ... Municipality 8, County 7, Title 4, Keywords 3, Abstract 2, Appendices 1, whereas for the facet “mineral resource”, the fields searched and their weights are the following: Title 8, Signature 6, Keywords 4, Abstract 2, Appendices 1. System administrators have the possibility of adjust- ing these parameters ...

  • 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
    ... and Testing in Heavy Metals and Methylene Blue Removal Sanja Krstić 1, Milan Kragović 1,* ID , Maja Pagnacco 2 ID , Vladimir Dodevski 1, Branka Kaluđerović 1, Miloš Momčilović 1, Ivica Ristović 3 and Marija Stojmenović 1 1 Vinča Institute of Nuclear Sciences, University of Belgrade, Mike P ...
    ... Characterization and Testing in Heavy Metals and Methylene Blue Removal 1,* Sanja Krsti¢ 1, Milan Kragovi¢ , Maja Pagnacco 7“, Vladimir Dodevski 1, Branka Kaluderovié 1, Milo’ Momiéilovi¢ 1, Ivica Ristovi¢ > and Marija Stojmenovi¢ 1 1 Vinéa Institute of Nuclear Sciences, University of Belgrade, Mike P ...
    ... model, which linear forms are given in Equations (1)–(3) [65], respectively: ln qt qe = k1t (1) t qt = 1 k2·q2 e + 1 qe t (2) qt = b· ln(ab) + b·lnt (3) where, qe and qt (mg/g) are removed amounts of MB in equilibrium and time t (min), k1 (1/min) and k2 (g/(mg·min)) are constants of rate for ...

  • An overview of the radiation properties of spring water in the rural areas of Central Serbia

    Biljana Vučković, Smiljana Marković, Snežana Stević, Sanja Mrazovac Kurilić, Ljiljana Nikolić-Bujanović, Nataša Todorović, Jovana Nikolov, Dragan Radovanović, Danica Srećković Batoćanin, Anja Jokić (2021)
    Health, Toxicology and Mutagenesis,Public Health, Environmental and Occupational Health,Pollution,Soil Science,Waste Management and Disposal,Water Science and Technology,Environmental Chemistry,Analytical Chemistry

  • Environmental flows and demands for sustainable water use in protected karst areas of the Western Balkans

    Zoran Stevanović, Aleksandra Maran Stevanović, Želimir Pekaš, Romeo Eftimi, Veljko Marinović (2021)
    Karst terrains cover some 30% of the Western Balkans, where rich karst aquifers represent the main source of potable water supply and ensure the development of local economies and tourism. In this “classical karst” region, there are also numerous sites or areas under different forms of protection—from those that are included in the UNESCO World Heritage list to natural monuments and landscapes that are protected by national legislation. In and around them are specific representatives of flora and fauna ...
    Karst, Zaštićena područja, Ekosistem, Ranjivost i održivost, Zapadni Balkan

  • Environmental flows and demands for sustainable water use in protected karst areas of the Western Balkans

    Zoran Stevanović, Aleksandra Maran Stevanović, Želimir Pekaš, Romeo Eftimi, Veljko Marinović (2022)
    Karst terrains cover some 30% of the Western Balkans, where rich karst aquifers represent the main source of potable water supply and ensure the development of local economies and tourism. In this “classical karst” region, there are also numerous sites or areas under different forms of protection—from those that are included in the UNESCO World Heritage list to natural monuments and landscapes that are protected by national legislation. In and around them are specific representatives of flora and fauna ...
    Karst, zaštićena područja, ekosistem, ranjivost i održivost, Zapadni Balkan

  • Analiza softvera za projektovanje ESP sistema

    Aleksandar Sredojević (2024)
    U momentu kada pritisak na dnu bušotine nije dovoljan da savlada ukupne gubitke pritisaka od dna bušotine do separatora, proizvodnja pomoću ležišne energije nije više moguća i bušotina prestaje sa eruptivnim radom. Kako bi ponovo omogućili proizvodnju fluida iz bušotine, potrebno je primeniti neke od mehaničkih metoda eksploatacije. Najprimenljivije mehaničke metode eksploatacije su: gas lift (GL), dubinske pumpe sa klipnim šipkama (SRP), električne uronjene centrifugalne pumpe (ESP), zavojne pumpe (PCP) i hidraulične pumpe (HP). Jadna od tih metoda koja ...
    električna centrifugalna pumpa (ESP), proizvodnja fluida, mehaničke metode eksploatacije, Prosper, Pipesim
    ... ležištu, bar Pwr - dinamički pritisak na dnu bušotine, bar (Gabor, T., 2018) Slika 3-1 prikazuje grafik pravolinijskog IPR-a. Nekoliko važnih karakteristika pravolinijskog IPR-a mogu se videti na slici 3-1: 1. Prema standardu, zavistan parametar, protok, definiše x osu, dok nezavistan parametar ...
    ... IPR-a jednak je recipročnom indeksu produktivnosti (nagib = 1/J) (Michael G., Curtis H., W., 1991). Pritisak u ležištu pr Ra zl ik a pr it is ak a Pr it is ak ba r Nagib=1/J AOF:C]Omax Protok m*/dan Slika 3-1: Pravoliniska IPR kriva (Michael G., Curtis H., W., 1991) U mnogim ...
    ... IPR kriva se zajedno koristi sa VLP krivom (slika 5-1) za određivanje produktivnog kapaciteta bušotine (Atao, M., 2014; Hisham, B., M., Aman, A., 2017). 240 - Pr it is ak , ba r i | == VLP Curve 1 - IPRCUvo + Protok, m*/dan Slika 5-1 IPR u odnosu na VLP kriva za početno stanje rezervoara ...

  • Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm

    Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić (2021)
    Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...
    Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering
    ... the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm Boško D. Josimović 1,*, Aleksandar Cvjetić 2 and Božidar Manić 1 1 Institute of Architecture, Urban & Spatial Planning of Serbia, 11000 Belgrade, Serbia; bozam@iaus.ac.rs 2 Faculty of Mining and ...
    ... tal elements, in this case in relation to generating noise. In this way, optimal options are sought at the earliest stage of project -3 -2 -1 0 1 2 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Magnitude of impacts S E A o b je ct iv es Unit 3 – Žednik north (22 wind turbines) Energies 2021 ...
    ... Group, Performance Standard 1—Social and Environmental Assessment and Manage- ment Systems; Environmental, Health, and Safety (EHS) Guidelines, 1. Environmental—1.7 Noise (2007). Available online: https://www.ifc.org/wps/wcm/connect/4a4db1c5-ee97-43ba-99dd-8b120b22ea32/1-7%2BNoise.pdf?MOD=AJ- PER ...

  • Towards Automatic Definition Extraction for Serbian

    Ranka Stanković, Cvetana Krstev, Rada Stijović, Mirjana Gočanin, Mihailo Škorić (2021)
    U radu su prikazani preliminarni rezultati automatske ekstrakcije kandidata za definicije rečnika iz nestrukturiranih tekstova na srpskom jeziku u cilju ubrzanja razvoja rečnika. Definicije u rečniku Srpske akademije nauka i umetnosti (SANU) korišćene su za modelovanje različitih tipova definicija (opisnih, gramatičkih, referentnih i sinonimskih) koje imaju različite sintaksičke i leksičke karakteristike. Korpus istraživanja sastoji se od 61.213 definicija imenica, koje su analizirane korišćenjem morfoloških e-rečnika i lokalnih gramatika implementiranih kao pretvarači konačnih stanja u paketu za obradu korpusa otvorenog ...
    ... (group) Type No of recognised definitions To the end Example 1 (1) see 10849 9830 (91%) акушерка N в.бабица (accoucheuse N v. midwife) 2 (1) surname 3672 3670 (100%) Андрић N презиме (Andrić N surname) 3 (1) verbal noun 913 912 (100%) плакање N гл. им. од плакати (crying ...
    ... recognizes) definitions of nouns that represent attributes and/or state is given in Figure 1. Below the graph, six definitions are listed that are recognized by the corresponding paths in the graph. 1. адаптираност N стање онога што је прилагођено, прилагођеност, подешеност. (the state of what ...
    ... type of 1435 1250 (87%) бисер N врста пенушавог вина (pearl N a kind of sparkling wine) 5 (1) diminutive 1629 1575 (97%) ветрић N дем. и хип. од ветар; (small wind N dim. and hyp. of wind) 6 (1) first name or a nickname 914 857 (94%) Пачавра N лични надимак (Pačavra N personal nickname) ...

  • Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia

    Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  • Exhumation history of the Juhor Mts. in central Serbia, the Northern Serbo–Macedonian Subunit

    Uros Stojadinovic, Hannah Pomella, Nemanja Krstekanić, Bojan Kostić, Maja Maleš, Nikola Randjelovic, Miloš Radonjić (2024)
    Northern Serbo–Macedonian Subunit, low-t thermochronology, kinematic analyses, extensional deformations

  • Building learning capacity by blending different sources of knowledge

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić (2016)
    ... Char +LOM.TypicalLearningTime : Double 4. Educational +DC.Publisher : String +LOM.Cost : Double +DC.Rights : String 5. Rights 1 0..1 0..* 0..1 0..* 0..1 0..1 +LOM.Keyword : String +LOM.Coverage.Region : String +LOM.Coverage.Country : String +DC.Subject : String 6.Classification 0..* ...
    ... approaches to today’s social problems can be built”1. In this paper we describe an approach to making available both entrepreneurial knowledge to university students on a wider basis and 1 http://www.oeconsortium.org/about-oec/ ...
    ... Wiley and Sons Inc. Etzkowitz, H. (2004). The evolution of the entrepreneurial university. International Journal of Technology and Globalisation, 1 (1), 64-77. Gaul, W., & Schader, M. (Eds.). (2012). Data, expert knowledge and decisions: an interdisciplinary approach with emphasis on marketing ...

  • Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications

    Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалима

  • Петрологија црвених пешчара источне Србијe

    Андреј Марковић (2024)
    У источној Србији формација црвених пешчара има велико распрострањење и улази у састав многих планина овог дела наше земље. Формацију чине кластичне стене интензивно црвене боје псамитске, ређе псамитско-псефитске структуре и алевритске структуре. Ове стене леже трансгресивно преко старијих пермо-карбонских и карбонских стена, док навише прелазе у доњотријаске седименте. Формација црвених пешчара захвата два појаса унутар Карпато-балканида – унутрашњи и средишњи део. Узорци анализирани у овом раду део су средишњег појаса. Тема завршног рада је петрологија црвених пешчара источне ...
    источна Србија, црвени пешчар, петролошко-минералошке карактеристике, аркозе
    ... a _Sa _ - e „9TIPVUTV HA Opayaai eR —| h, X — / i / eoši Y ·. ~ i Cnuka 1. Kapra Cponje (https://geografijazaradoznale.wordpress.com/wp- content/uploads/201 5/09/koridor-10a-gif.jpg) ca reprropHjoM peke 1 pse koji Ilapahana (https://www.musicar.rs/reka-grza/mapa-grza/) 1.2. IIiperaten ...
    ... Kapra acnarHBaHor no/ipyuja – npepabeHo npea OLK 1:100 000 mucr IIapahaH, (Jlonuh u np., 1978) a mcr BojbeBau (BecenaHoBuh u np., 1964). nmacra IIapahHMH (BecenaHoBHh H nmp. 1964) H ceBepo3amajHoM JIey HHCTa BOJbeBAaI OcHoBHe reonortmikKe Kapre 1:100.000. V najbeM TeKcTy CJIeIH KpaTaK OHHC TeOJIOrHJeC ...
    ... Ilerponoruja upBeHux nemuapa ucrouHe Cp0ouje Kanpnunar Menrop Anjipej MapkonBuh [11/17 TIpod. np Buonera Tajuh Beorpajn, jy.r, 2024. Kowmucuja: 1. Jip Baonera Tajah, BaH. npo(b., MeHTOp Pynapcko-reonomrku (bakyanrer, Beorpaji 2. Jip Jlanuna CpehkoBuh-Barohanus, pejn. npodQ., umaH Pynapcko ...

  • Using Query Expansion for Cross-Lingual Mathematical Terminology Extraction

    Velislava Stoykova, Ranka Stanković (2018)

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving

  • Метода променљивих околина за решавање проблема p-центра са поузданом мрежом

    Јована Рађеновић, Стефан Мишковић, Оливера Станчић (2023)
    У овом раду је разматран проблем p-центра са поузданом мрежом (енгл. Reliable p-center facility location problem - RpCFLP). Решавање проблема подразумева иницијално успостављање p ресурса и алокације корисника, као и накнадну реалокацију корисника у складу са новонасталим сценаријима који садрже информације о онеспособљеним ресурсима и осталим измењеним улазним подацима. За решавање посматраног проблема предложена је метахеуристика заснована на итеративној варијанти основне методе променљивих околина (енгл. Iterated basic variable neighborhood search - IBVNS). Резултати тестирања предложене метахеуристике указују на њену ...
    Проблем p-центра, Робусна оптимизација, Метода променљивих околина