Претрага

Упит dcterms_subject_txt:proof-of-concept lexicon encoding

125 items

  • The Reciprocal Algebraic Integers Having Small House

    Dragan Stankov (2021)
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • The number of unimodular roots of some reciprocal polynomials

    Dragan Stankov (2020)
    We introduce a sequence P2n of monic reciprocal polynomials with integer coefficients having the central coefficients fixed. We prove that the ratio between number of nonunimodular roots of P2n and its degree d has a limit when d tends to infinity. We present an algorithm for calculation the limit and a numerical method for its approximation. If P2n is the sum of a fixed number of monomials we determine the central coefficients such that the ratio has the minimal limit. ...
    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 necessary and sufficient condition for an algebraic integer to be a Salem number

    Dragan Stankov (2019)
    We present a necessary and sufficient condition for a root greater than unity of a monic reciprocal polynomial of an even degree at least four, with integer coefficients, to be a Salem number. This condition requires that the minimal polynomial of some power of the algebraic integer has a linear coefficient that is relatively large. We also determine the probability that an arbitrary power of a Salem number, of certain small degrees, satisfies this condition.
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • 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

  • The number of nonunimodular roots of a reciprocal polynomial

    Dragan Stankov (2023)
    We introduce a sequence Pd of monic reciprocal polynomials with integer coefficients having the central coefficients fixed as well as the peripheral coefficients. We prove that the ratio of the number of nonunimodular roots of Pd to its degree d has a limit L when d tends to infinity. We show that if the coefficients of a polynomial can be arbitrarily large in modulus then L can be arbitrarily close to 0. It seems reasonable to believe that if ...
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • Geostatički proračuni sanacije klizišta šipovima

    Slobodan Ćorić, Dragoslav Rakić, Dušan Berisavljević (2019)
    U ovom radu su, polazeći od rezultata geotehničkih istraživanja, prikazani geostatički proračuni sanacije klizišta vertikalnim šipovima. Metodologija proračuna je složena, jer podrazumeva interakciju klizišta i stabilizirajućih šipova. Stoga se simultano analiziraju stabilnost klizišta i stabilnost šipova. Prilikom određivanja bočne otpornosti tla oko šipova koristi se metoda Brinč Hansena koja uzima u obzir trodimenzionalne uslove u tlu i može da se primeni u složenim geološkim uslovima koji su česti u Srbiji. Analize stabilnosti klizišta vrše se odgovarajućim metodama granične ravnoteže. ...
    sanacija klizišta, interakcija klizišta i šipa, bočna otpornost šipova, stabilnost klizišta i šipova
    ... together with piles, contribute to a target value of safety factor of the landslide. Accordingly, all relevant factors are presented in the paper. KEY WORDS: landslide stabilization, landslide-pile interaction, lateral resistance of piles, stability of landslide and piles 294 UVOD Prilikom sanacije ...
    ... (Brinč Hansen, 1961) Figure 3. Coefficient of lateral pressure which is dependent of cohesion (Brinch-Hansen, 1961) Slika 2. Koeficijent bočnog pritiska tla koji zavisi od vertikalnog, napona Figure 2. Coefficient of lateral pressure which is dependent of verftical stress (Brinch-Hansen, 1961) ...
    ... J. B.: The ultimate resistance of rigid piles against transversal forces, Danish Geotechnical Institute, Bulletin No. 12, Copenhagen, 1961. Hutchinson, J.N.: The assesment of the effectiveness of corrective measures in relation to geological conditions and types of slope movement, Bulletin IAEG., ...

  • A Lexical Approach to Acronyms and their Definitions

    Cvetana Krstev, Duško Vitas, Ranka Stanković (2015)
    In this paper we present a comprehensive approach to acronyms for Natural-Language Processing (NLP) of Serbian texts. The proposed procedure includes extraction of acronyms and their definitions that are usual Multi-Word Units (MWUs), shallow parsing of MWUs that enables MWU lemmatization and production of entries in morphological electronic dictionaries, both for MWU and acronyms, that are provided with grammatical, syntactic, semantic and domain information. This approach enables representation that reflects complex relations between acronyms and their definitions.
    ... D. Vitas, and M. Utvić, 2010. Automatic construction of a morpho- logical dictionary of multi-word units. In IceTAL, vol- ume 6233 of LNCS. Springer. Krstev, C. and D. Vitas, 2005. Corpus and Lexicon – Mu- tual Incompletness. In Proc. of the Corpus Linguistics Conference, Birmingham. Liberman ...
    ... consists of a number of words in a se- quence that corresponds to the length of the associ- ated acronym; • The first of these words has to be in the upper-case; • Words can be interspersed with prepositions and/or conjunctions; • The number of selected words can be less than a length of the associated ...
    ... processing of proper names in texts. In Proceedings of the 7th conference on European chapter of the ACL. Morgan Kaufmann Publishers Inc. Wren, J. D., H. R. Garner, et al., 2002. Heuristics for identification of acronym-definition patterns within text: towards an automated construction of comprehensive ...

  • 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
    ... of CLIB 2018 95 4. Specific Features of RuThes Structure The main unit of RuThes is a concept as a unit of thought regardless of words expressing it. A concept has a unique, unambiguous name. Concept names are similar to descriptors in information-retrieval thesauri, that is precisely formulated ...
    ... entries of a specific concept can comprise single words of different parts of speech, including ambiguous ones, and phrases that can be either idiomatic or compositional groups. Large rows of synonyms and term variants are collected to provide better recog- nition of concepts in texts. The concept-based ...
    ... in RuThes is that the concept-parts must be rigidly connected with their whole, Proceedings of CLIB 2018 96 that is, each example of the concept-part must, throughout its entire existence, require the existence of the concept-whole. This corresponds to the guidelines of information-retrieval thesaurus ...

  • Белешка о дигитализацији речника

    Душко М. Витас, Цветана Ј. Крстев, Ранка М. Станковић (2019)
    У раду ће се анализирати ограничења која проистичу из линеарног процеса традиционалне израде речника на примеру Речника САНУ. Начин да се превазиђу ова ограничења се састоји у формирању електронске лексикографске базе која не представља само пуку дигиталну транскрипцију папирног издања речника. Посебно се указује на чињеницу да текст речника може представљати корпус и приказују се одабрани примери анализе таквог корпуса формираног из текстове 1. и 19. тома Речника САНУ.
    лексикографија, рачунарска лексикографија, информатика, информациони систем
    ... James; Olga Batiukova. The Lexicon. Cambridge University Press. Станковић и др. 2018а: Stanković, Ranka; Cvetana Krstev, Biljana Lazić, Mi- hailo Škorić. Electronic Dictionaries – from File System to lemon Based Lex- ical Database, John P. McCrae et al. (eds.) Proc. of the 11th LREC – W23 6th Workshop ...
    ... analyses the limitations of the linear process of the traditional dictionary production and illustrates them on the example of the SASA Dictionary. These limitations can be overcome by the establishment of a lexicographic database that represents more than the digital transcription of a paper dictionary ...
    ... 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 as the employees' publications. - The Repository ...

  • OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian

    Ranka Stanković, Maxim Ionov, Medina Bajtarević, Lorena Ninčević (2024)
    Ovaj rad predstavlja novi jezički resurs za pretraživanje i istraživanje verbalnih aspektnih parova u BCS (bosanskom, hrvatskom i srpskom), kreiran korišćenjem principa Lingvističkih Povezanih Otvorenih Podataka (LLOD). Pošto ne postoji resurs koji bi pomogao učenicima bosanskog, hrvatskog i srpskog kao stranih jezika da prepoznaju aspekt glagola ili njegove parove, kreirali smo novi resurs koji će korisnicima pružiti informacije o aspektu, kao i link ka aspektnim parovima glagola. Ovaj resurs takođe sadrži spoljne linkove ka monolingvalnim rečnicima, Wordnetu i BabelNetu. ...
    aspekt glagola, lingvistički otvoreni podaci, BCS

  • Assessing Criteria Weights by the Symmetry Point of Criterion (Novel SPC Method) - Application in the Efficiency Evaluation of the Mineral Deposit Multi-Criteria Partitioning Algorithm

    Zoran Gligorić, Miloš Gligorić, Igor Miljanović, Suzana Lutovac, Aleksandar Milutinović (2023)
    Information about the relative importance of each criterion or the weights of criteria can have a significant influence on the ultimate rank of alternatives. Accordingly, assessing the weights of criteria is a very important task in solving multi-criteria decision-making problems. Three methods are commonly used for assessing the weights of criteria: objective, subjective, and integrated methods. In this study, an objective approach is proposed to assess the weights of criteria, called SPC method (Symmetry Point of Criterion). This point ...
    Вишекритеријумско одлучивање, тежине критеријума, тачка симетрије критеријума, налазиште минерала, алгоритам, процена учинка

  • Availability as a dimension of energy security in the Republic of Serbia

    Boban Pavlović, Dejan Ivezić (2016)
    There is a range of modern approaches and models in literature for the evaluation and determination of energy security, which are based on different parameters and indicators. For most of them, a common characteristic is emphasizing the avail ability of energy, as an important dimension for ensuring energy security. In this paper, concise overview of Serbian energy sectors is given and appropriate energy indicators are defined and determined. Selected indicators provide insight into the main components that characterize availability ...
    raspoloživost energije, energetski indikatori, energetska bezbednost
    ... energy se- curity and determination of energy indicators [1-6]. Selection of data used for indicators deter- mination primarily depends on the vision of a multi-dimensional concept of energy security, and from the selection of critical dimensions for functioning of the energy system and its safety. ...
    ... deter- mination of availability – as a dimension of energy security in Serbia. Concept and dimensions of energy security Very often energy security has different meaning in different situations and to different people. Definitions of energy security vary from continuous supply of oil to the environmen- ...
    ... different interpretation of the concept. In addition to that, energy security has to involve main values and principles of a specific national energy policy [5]. Nowadays, energy security is also closely in- volved with other issues, such as security of infrastructure, equality of access to modern energy ...

  • Application of the Fuzzy theory in the evaluation of operating parameters of auxiliary mechanization on open-cast coal mine, case study: pipelayers

    Stevan Djenadić, Miloš Tanasijević, Filip Miletić, Predrag Jovančić (2022)
    Achieved operating parameters are the main indicator of the work quality and selection of mining machines. The effectiveness of a coal mine is correlated with the availability of basic and auxiliary machines. The main task of auxiliary machines in lignite mines is to achieve optimal working conditions. From an economic point of view, auxiliary machines generate up to 20% of the lignite mines' total costs. These are the primary reasons for analyzing their current work and making decisions in ...
    upotrebni kvalitet, fazi teorija, rudarske mašine

  • Possibilities for Reduction of Energy-Related Air Pollution in Serbia - Exploring Energy Scenarios

    Marija Živković, Boban Pavlović, Dejan Ivezić, Aleksandar Mijatović (2023)
    Fossil fuels and biomass account for almost 93% of the total primary energy supply in Serbia. Meeting the energy needs of consumers implies a transformation of the chemical energy of fuels through combustion processes to obtain heat that can be utilized as such, or further transformed into mechanical or electrical energy. These processes have an undeniable impact on air pollution, even in cases of biofuels or hydrogen combustion. Possibilities for air pollution reduction are identified, both on the supply ...
    загађење ваздуха, сценарији енергетског развоја, Србија

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... automatic recognition of significant events is crucial for improving asset management. Machine Learning (ML) can process vast amounts of information in real- time and convert it into actionable insights.Pattern recognition on dynamometric cards 44 is not a novel concept. Most recent studies have ...
    ... 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.bg.ac.rs University of Belgrade Faculty of Mining and Geology Master ...
    ... stroke length of the smooth rod. Key structural components of the horsehead include the balance beam, the connecting rod (cam mechanism), the adjustment rod, counterweights, a gearbox, and a driving electric motor. The length of the adjustment rod, number of strokes, and the stroke length of the smooth ...

  • Simpson's rule application for experimental determining parameters of rock mass oscillation equation at limestone

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Branko Gluščević, Luka Crnogorac (2021)
    By its form, the use of explosives has a destructive character. However, energy of chemical explosives is tamed and perfected in many effects, so that is developed a series of activities which work is unthinkable without the use of explosives. In mining industry, explosives are most commonly used for exploitation in hard rock mass. Thereby, large amounts of explosives can be used, especially for mass blasting. The application of large amounts of explosives gives auspicious techno – economic indicators ...
    working environment, seismic effects of blasting, oscillation velocity, rock mass oscillation equation, Simpson’s rule

  • Analysis of the correlation between modified secondary and primary compression index on the example of old municipal waste in Serbia

    Dragoslav Rakić, Irena Basarić Ikodinović, Jovana Janković, Tina Đurić (2022)
    The paper presents the results related to the determination of the index of primary and maximum and minimum indices of secondary compression, i.e. modified primary and secondary compression indices (Cc, Cc', C'min, C'max), obtained by laboratory testing of artificially prepared municipal waste samples (three series of 9 samples in total) in an oedometer apparatus with a diameter of 20 cm. Old municipal waste was used, which was taken from two landfills in Serbia, one that is ...
    municipal solid waste, secondary compression index, ratio of modified secondary and primary compression index

  • Određivanje prostorne distribucije vrednosti hidrauličkih parametara izdani: primer površinskog kopa „Radljevo“

    Dragoljub Bajić, Dušan Polomčić, Jelena Ratković, Predrag Pajić (2019)
    Najčešće se kalibracija hidrodinamičkih modela vršila manuelno - „probanjem“ sa različitim vrednostima hidrauličkih parametara i hidrauličkih karakteristika graničnih uslova. Ovakav način rada zahteva veliko znanje i iskustvo eksperta, pri čemu ostaje otvoreno pitanje da li dobijeno rešenje ima optimalan skup parametara. Primenom optimizacione metode, koja se zasniva na Gauss-Marquardt-Levenberg-ovom algoritmu, i PEST softvera, ...
    kalibracija hidrodinamičkog modela, PEST, koeficijent filtracije

  • Projecting short to medium-term effects of carbon emissions trading on Serbia's GDP

    Boban Pavlović, Nikola Trtica (2024)
    This paper presents an approach to assess the short to medium-term effects of the Emissions Trading System (ETS), an economic and climate policy instrument aimed at reducing greenhouse gas emissions, on GDP from the expenditure side. The analysis focuses on Serbia’s electricity sector, which relies heavily on lignite-based pro duction dominated by state-owned enterprises. The obtained projections suggest that in the short term, the introduction of an ETS may lead to slower GDP growth compared to official forecasts. However, ...
    ETS, BDP - rashodni pristup, cene električne energije
    ... Understanding the dynamics of key economic indicators at the na- tional level and the key characteristics of the electricity sector is crucial for assessing the impacts of the ETS on the expenditure side of GDP in a specific economy. A comprehensive analysis of the state of the Serbian economy and ...
    ... sells 99.9% of electrical energy. The separation of operators of the transmission and distribution systems of electricity is executed through the Joint Stock Company “Elektromreža Srbije” (EMS) for the transmission of electricity, which is 100% state-owned, and Electric Distribution of Serbia Limited ...
    ... The structure of electricity production by energy sources in Serbia (%) (2013—2022) (Statistical Office of the Republic of Serbia, 2023). Recommendation of the Ministerial Council of the Energy Community, Serbia prepared an INECP covering the period from 2021 to 2030 (Republic of Serbia, 2023) ...

  • Frequency and Length of Syllables in Serbian

    Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová (2019)
    Basic analyses of several properties of syllables (the rank-frequency distribution, the distribution of length, and the relation between length and frequency) in Serbian is presented. The syllabification algorithm used combines the maximum onset principle and the sonority hierarchy. Results indicate that syllables behave similarly to words as far as mathematical models are concerned, but values of parameters in models for syllables are quite different from those for words.
    frekvencije slogova, dužina slogova, srpski jezik
    ... In addition, the rules derived from Pulgram’s approach can change relatively quickly, as lexicon is one of the more dynamic language features. Therefore, we follow another approach, namely, a combination of the maximum onset principle and the sonority sequencing principle. The paper is organized ...
    ... investigate many properties of syllables. In this paper we limit ourselves to analyses of three aspects: 1) the rank-frequency distribution, 2) the distribution of length, and 3) the relation between length and frequency. The goodness-of-fit of a model is evaluated in terms of the discrepancy coefficient ...
    ... lack of its precise definition8 (cf. also Crystal, 2008, pp. 467-468; 1 Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovića 6, 21101 Novi Sad, Serbia, and Faculty of Mining and Geology, University of Belgrade, Đušina ...