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Упит dcterms_subject_txt:numeriki modeli,neuronske mreže

860 items

  • Knowledge and Rule-Based Diacritic Restoration in Serbian

    Cvetana Krstev, Ranka Stanković, Duško Vitas (2018)
    In this paper we present a procedure for the restoration of diacritics in Serbian texts written using the degraded Latin alphabet. The procedure relies on the comprehensive lexical resources for Serbian: the morphological electronic dictionaries, the Corpus of Contemporary Serbian and local grammars. Dictionaries are used to identify possible candidates for the restoration, while the dataobtainedfromSrpKorandlocalgrammarsassistsinmakingadecisionbetween several candidates in cases of ambiguity. The evaluation results reveal that,dependingonthetext,accuracyrangesfrom95.03%to99.36%,whilethe precision (average 98.93%) is always higher than the recall (average 94.94%).
    diacritic restoration, morphological dictionary, corpus, word n-grams, local grammars
    ... categorization (Loukachevitch and Dobrov, 2014), detecting Russian paraphrases (Loukachevitch et al., 2017), etc. We compare the RuThes model with the WordNet-like model of knowledge representation and de- scribe some applications of RuThes-like resources for text analytics. We also consider the structure ...
    ... y, or how to stop worrying about what there is. Recent advances in natural language processing V, pages 1–20. Will, L. (2012). The iso 25964 data model for the structure of an information retrieval thesaurus. Bulletin of the Association for Information Science and Technology, 38(4):48–51. Proceedings ...

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

    Vesna Cvetkov (2020)
    ... anomalija pre (leva kolona) i nakon postupka RTP (desna kolona) za: vertikalnu prizmu (gornji red); prizmu pod nagibom od 45° ka istoku (srednji red) i model sre- dine sa više prizmi koje imaju različite vrednosti magnetne susceptibilnosti, različite dimenzije i nalaze na različitoj dubini (zadnji red) ...
    ... poslednjih nekoliko hi- ljada godina praktično odgovaraju vred- nostima savremenog MPZ, te se za po- stupak RTP koriste vrednosti preuzete iz matematičkih modela globalnog MPZ (IGRF-International Geomagnetic Refe- rence Field; WMM-World Magnetic Mo- del) za datum kada je rađena akvizicija podataka. Na ...
    ... 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 parameter estima- tes in ...

  • Application of the VIKOR Method for Selecting the Purpose of Recultivated Terrain after the End of Coal Mining

    Radmila Gaćina, Sanja Bajić, Bojan Dimitrijević, Tomislav Šubaranović, Čedomir Beljić, Dragoljub Bajić (2024)
    reclamation, coal, sustainable development, multi-criteria decision making, VIKOR method

  • Results of comprehensive monitoring activities on Umka landslide, Belgrade, Serbia

    Biljana Abolmasov, Uroš Đurić (2021)
    klizišta, monitoring
    ... Taylor&Francis Group, London, Vol 2, pp. 1381-1385. Abolmasov B., Milenković, S., Marjanović M., Đurić U. and Jelisavac B., 2015, A geotechnical model of the Umka landslide with reference to landslides in weathered Neogene marls in Serbia. Landslides 12 (4): 689-702. Ćorić S., Božinović D., Vujanić ...

  • Introductory editorial - Special issue: Genesis and protection of groundwater in carbonate aquifer

    Saša Milanović (2019)
    Geochemistry and Petrology

  • Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals

    Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić (2020)
    As the number of poorly soluble drugs is increasing, nanocrystals have become very interesting due to wide range of application possibilities. Curcumin was used as a model active ingredient in this work. Even though it has many proven positive effects, due to its physicochemical issues, its possibilities have not been fully exploited. The goal of this work was to select optimal conditions for a top-down method for curcumin nanosuspension production, and to perform their comprehensive characterization applying complementary methodologies: ...
    nanocrystal, curcumin, top-down method, wetball milling

  • 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 existing designs and the assessment of the impact of future changes in system parameters. Once a system model is calibrated with real fluid data, Prosper can be confidently used to model the well under various scenarios and make forward predictions of reservoir pressure based on surface production ...
    ... developed by validating and calibrating the models against actual performance. Each component of the model is validated separately, thus eliminating dependencies on other components of the well model. [20] 5.2.1. Prosper Features Prosper can predict either Pressure or Pressure and Temperature. ...
    ... includes a large database of pumping units, making it easy to select and compare units without needing to manually gather unit dimensions. It can model any pumping unit geometry, including long-stroke units, and you can enter custom data 1f your unit is not in the database. Advanced error trapping ...

  • 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

  • Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone

    Emő Márton, Marinko Toljić, Vesna Cvetkov (2022)
    The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...
    Adria–Europe suture, Vardar Zone, Paleomagnetism, Thrusting, Vertical axis rotation

  • Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова

    Milena Rosić (2014-12-05)
    У оквиру ове докторске тезе, испитиване су оптималне методе за добијањенанопраха – калцијум манганског оксида допираног јонима гадолинијума. Циљистраживања је испитивање одговарајућих прекурсора који су подесни да седобију чисти нано прахови манганита са перовскитском структуром, као имонофазни чврсти раствори са перовскитском структуром. Као подесан методкоришћена је модификована глицин нитратна метода, а од прекурсора нитрати иацетати одговарајућих метала. Модификација глицин нитратне методе се односина делимичну замену нитрата ацетатима, чиме је ублажена бурност реакције.Испитан је различити однос прекурсора, који дају наночестичне ...
    Наноструктурни материјали, Оксиди, Термална анализа,Рендгенструктурна анализа, Магнетна мерења.
    ... Ефекат површине има значајну улогу при проучавању магнетних својстава наночестичних материјала. За њихово описивање се користи модел језгро-омотач. Према овом моделу, честица се састоји од магнетно уређеног језгра и неуређеног омотача. Омотач честице је одговоран за појаву нових својстава, док ...
    ... перовскити. Симетрију одређује однос величине катјона и анјона у решетци, док на структуру перовскита утичу температура и притисак. Октаедарска мрежа у структури перовскита може, захваљујући систему нагињања, да се прилагоди и да уклопи катјоне различите величине у положајима А и В (Lufaso & Woodward ...
    ... нагињањем у суштини крутих BO6-октаедара, при чему се задржава њихова веза преко рогљева. Посебно је изражен, када је А катјон сувише мали за тесералну мрежу октаедара. Тада је потребна најмања енергија, јер се растојање А–О скраћује, а да се при том не мења координациона сфера око октаедарског катјона ...

  • The correlation of Upper Miocene lithostratigraphic units of the southern part of the Pannonian basin

    Filip Anđelković, Dejan Radivojević (2019)
    gornji miocen, litostratigrafske jedinice, formacije, Panonski basen
    ... units, formations, Pannonian Basin Sažetak Panonski basen je klasičan izalučni basen, formiran tokom miocena. Riftogeneza se odvijala po modelu asimetričnog jednostavnog smicanja. Analiza sinkinematskih seizmičkih refleksija pokazuje da je normalno rasedanje migriralo vremenski i prostorno ...

  • NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands

    Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić (2012)
    Reakcije supstitucije monofunkcionalnog [Ru(terpi)(bipi)(H2O)]2+ kompleksa, gde je terpi = 2,2′:6′,2″-terpiridin i bipi = 2,2′-bipiridin, sa biološki relevantnim sumporo donorskim ligandima, kao što su tiourea, l-metionin, l-cistein i glutation, proučavane su u vodenim rastvorima tehnikom 1H i 13C NMR spektroskopije. Sve reakcije su proučavajne na pH 7,4, u prisustvu fosfatnog pufera, da bi se oponašalo fiziološko okruženje tokom procesa supstitucije. Reakcije se izvode na 295 K pod uslovima reakcija drugog reda. Uočeni rezultati pokazuju da brzina supstitucije snažno zavisi ...
    Materials Chemistry,Inorganic Chemistry,Physical and Theoretical Chemistry

  • Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area

    Jovan Kovačević, Maja Todorović, Marina Ćuk, Petar Papić (2016)
    jurski sedimenti, uran, torijum, elementi retkih zemalja, podzemna voda, istočna Srbija

  • Multiword Expressions between the Corpus and the Lexicon: Universality, Idiosyncrasy and the Lexicon-Corpus Interface

    Verginica Barbu Mititelu, Voula Giouli, Kilian Evang, Daniel Zeman, Petya Osenova, Carole Tiberius, Simon Krek, Stella Markantonatou, Ivelina Stoyanova, Ranka Stankovic, Christian Chiarcos (2024)
    Predstavljamo trenutne aktivnosti na definisanju interfejsa leksikona i korpusa koji će služiti kao referenca u prikazu polileksemskih jedinica - višečlanih izraza - (različitih tipova - imenskih, glagolskih, itd.) u specijalizovanim leksikonima i povezivanju ovih unosa sa njihovim pojavljivanjima u korpusima. Konačni cilj je korišćenje ovakvih resursa za automatsko identifikovanje višečlanih izraza u tekstu. Uključivanje nekoliko prirodnih jezika ima za cilj univerzalnost rešenja koje nije usredsređeno na određeni jezik, kao i prilagođavanje idiosinkrazijama. Raspravljaju se izazovi u leksikografskom opisu višerečnih ...
    multiword expression lexicon, corpus, proof-of-concept lexicon encoding

  • An Italian-Serbian Sentence Aligned Parallel Literary Corpus

    Saša Moderc, Ranka Stanković, Aleksandra Tomašević, Mihailo Škorić (2023)
    This article presents the construction and relevance of an Italian-Serbian sentence-aligned parallel corpus, delving into the aligned sentences in order to facilitate effective translation between the two languages. The parallel corpus serves as a valuable resource for language experts, researchers, and language enthusiasts, fostering a deeper understanding of linguistic nuances and cultural expressions. By bridging the gap between Serbian and Italian, this corpus opens new avenues for cross-cultural communication and collaboration, and ultimately contributes to the improvement of language-related ...
    Aligned corpus, parallel corpus, Serbian, Italian, literature

  • 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
    ... nine data sets collected between ambient conditions and 213 K were refined using the hexagonal model in P63/mmc. The 12 structures studied between 203 and 93 K were refined using the orthorhombic model (space group Cmcm). For �0-K3YbSi2O7, pseudo-merohedral threefold twinning was observed for all ...
    ... the nine data sets collected between ambient conditions and 213 K were refined using the hexagonal model in P63/mmc. The 12 structures studied between 203 and 93 K were refined using the orthorhombic model (space group Cmcm). For £’-K3YbSi,O,7, pseudo-merohedral threefold twinning was observed for all ...
    ... P63/mmc. It is isostructural with K3ErSi2O7 (Dabić et al., 2019). Therefore, atomic coordinates of this structural analogue were used as a starting model for structure refinement, where Er was replaced with Yb. The crystal structure was refined to R = 0.013. The structure of the K3YbSi2O7 crystal studied ...

  • Development of A Business Intelligence Tool For Accident Analysis in Mines

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Uroš Pantelić (2015)
    ... dictionary (s_koncept) which can be related to the main table on basis of different fields, depending on the dimension we want to follow. The BI model for mine safety integrates standard OLAP techniques based on RudOnto, where dimensions of OLAP cubes are concepts of the RudOnto ontology, and the ...
    ... this slot different dimensions that will be used for calculating the number of injuries can be defined in a quick and simple manner The BI model can offer important information for safety management but also allows different ways of presenting data. Figure 3 depicts three ways of presenting ...

  • Terminological and lexical resources used to provide open multilingual educational resources

    Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić (2016)
    Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...
    otvoreni obrazovni resursi, leksički resursi, obrada prirodnih jezika, terminologija
    ... changing the face of distant learning and education altogether by erasing geographical and spatial constraints, leaving the traditional education model behind [2]. Interactive forums and teaching assistants rely greatly on various NLP tools to help them cater to a large number of students from all ...
    ... resulting in insufficient interaction and feedback. These tools help overcome these hurdles at an advantage for both students and educators. The model of digital education also allows for a modern peer-to-peer education where students educate themselves and each other, exploring, developing and ...

  • Results of Recent Monitoring Activities on Landslide Umka, Belgrade, Serbia—IPL 181

    Biljana Abolmasov, Uroš Đurić, Jovan Popović, Marko Pejić, Mileva Samardžić Petrović, Nenad Brodić (2021)
    Klizišta, Monitoring, GNSS, Geodetska osmatranja, UAV snimci, PSInSAR
    ... 2 cm. Seven flights were performed in order to cover the entire landslide area (Fig. 3). “Zero” high resolution orthophoto and Digital Elevation Model (DEM) were principal SfM products from each sequence, as the same procedure was repeated in March 2019 and both obtained DEMs were analyzed and compared ...
    ... continued monitoring and analysing: (1) spatial patterns and relationships between landslide and element at risk, (2) proposing quantitative risk model and (3) landslide risk management, according to the Project goals. Those research objectives will be also part of IPL248 joint Project research between ...
    ... Landslide Forum, vol 1, pp 75–80. Springer International Publisher Abolmasov B, Milenković S, Marjanović M, Đurić U, Jelisavac B (2015) A geotechnical model of the Umka landslide with reference to landslides in weathered Neogene marls in Serbia. Landslides 12 (4):689–702 Fig. 8 Results of cumulative ...

  • Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)

    Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)
    The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...
    Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD
    ... factor 1%, squares are space group absences). (d) Arsenopyrite crystal structure in the same orientation left to right: ball-stick model, coordination tetrahedra model, Fe-tetrahedra, and As- and S-tetrahedra models. The red square indicates the unit cell (u.c.). For clarification, we analysed the ...
    ... observed on the experimental Kikuchi lines image (Figure 4b,c), the whole pattern symmetry is m (Figure 4a,b), and the arsenopyrite crystal structure model derived from the TEM analysis closely resembles the marcasite prototype structure (Figure 4d). We interpret the occurrence of the forbidden hk0 ...