Претрага
536 items
-
Indexing of textual databases based on lexical resources: A case study for Serbian
In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...... A System for Named Entity Recog- nition Based on Local Grammars. J Logic Computation 24(2), 473–489 (2014) 8. Manning, C.D., Raghavan, P., Schütze, H.: Introduction to Information Retrieval, vol. 1. Cambridge University Press (2008) 9. Martinović, M.: Transfer of Natural Language Processing Technology: ...
... http://arxiv.org/abs/1209.4471 12. Mladenović, M., Mitrović, J., Krstev, C.: Developing and Maintaining a WordNet: Procedures and Tools. In: Orav, H., Felbaum, C., Vossen, P. (eds.) Proceedings of the Seventh Global Wordnet Conference, GWC 2014. pp. 55–62. Tartu, Estonia (2014) 13. Nadeau, D., Sekine ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Indexing of textual databases based on lexical resources: A case study for Serbian" in Semantic Keyword-based Search on Structured Data Sources : First COST Action IC1302 International KEYSTONE Conference, IKC 2015, Coimbra, Portugal, September 8-9, 2015. Revised Selected Papers, Springer (2015). https://doi.org/10.1007/978-3-319-27932-9_15
-
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 . "Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area" in Carpathian Journal of Earth and Environmental Sciences (2016)
-
Improving efficiency of thermal power plants through mine coal quality planning and control
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 ...Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja. "Improving efficiency of thermal power plants through mine coal quality planning and control" in Thermal Science, Vinča Institute of Nuclear Sciences (2018). https://doi.org/10.2298/TSCI170605209B
-
Effectiveness Analysis of Different Bucket-wheel Excavators
Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić. "Effectiveness Analysis of Different Bucket-wheel Excavators" in 8th International Conference Mining and Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
-
Енергетска безбедност Европске уније у светлу актуелне енергетске транзиције
Бобан Павловић, Дејан Ивезић (2021)Енергетска стратегија Европске уније, која од 2015. године обухвата и циљеве у области климатских промена, тежи изградњи „енергетске уније” која потрошачима из ЕУ даје сигурну, приступачну, чисту и одрживу енергију. Енергетска политика ЕУ поставља пред себе амбициозне циљеве у погледу коришћења обновљивих извора – учешће од 32% до 2030. године. Овако опсежну и динамичну енергетску транзицију у Европи усложњава хетерогеност националних енергетских система у погледу структуре енергетског микса, нивоа увозне зависности, као и нивоа технолошког, друштвеног и економског ...енергетска безбедност, Европска унија, енергетски показатељи, природни гас, обновљиви извори енергије... Jewell, J., “The concept of energy security: Beyond the four As”, Energy Policy, 75, 2014, pp. 415-421. 2. Gillessen, B., Heinrichs, H., Hake, J.-F., Allelein, H.-J., “Natural gas as a bridge to sustainability: Infrastructure expansion regarding energy security and system transition”, Applied ...
... Flaherty, C., Filho, W. L., “Energy Security as a Subset of National Security”, Global Energy Policy and Security, 16, 2013, pp. 11-25. 15. Doukas, H., Patlitzianas, K. D., Kagiannas, A. G., Psarras, J., “Energy Policy Making: An Old Concept or a Modern Challenge?”, Energy Sources, Part B, 3, 2008 ...Бобан Павловић, Дејан Ивезић. "Енергетска безбедност Европске уније у светлу актуелне енергетске транзиције" in Безбедносни форум, Евроазијски безбедносни форум, Београд (2021)
-
Stabilnost kosina u stenskoj masi - savremeni koncepti i metode proračuna
... preturanje blokova); koncept teorije plasti€nosti (grani¢na analiza); naponsko-deformacijska analiza primenom phi-c redukcije; verovatnoéa loma. Predgovor H Stabilnost kosina u stenskoj masi Nakon toga prikazani su osnovni postupci: ojacanja kosina ankerima, zaStite kosina torkretom i primenom plasti¢nih ...Zoran Berisavljević, Dušan Berisavljević, Miloš Marjanović. Stabilnost kosina u stenskoj masi - savremeni koncepti i metode proračuna, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet, 2021
-
Testing the energy value of different types of coal by the method of active thermography
In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Testing the energy value of different types of coal by the method of active thermography" in 9th International Scientific Conference on Defensive Technologies, Belgrade, Serbia, 15-16 October 2020, The Military Technical Institute (2020)
-
Uniaxial compressive strength test before and after standard fire test on rock mass
Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)... before testing. A constant mass is considered to have been reached when the difference between two consecutive weight measurements, performed at 24 ± 2 h intervals, is not greater than 0,1% of mass of test sample. After drying, and before testing, samples are stored at room temperature. Load on test ...Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović. "Uniaxial compressive strength test before and after standard fire test on rock mass" in Fifth symposium of the Macedonian Association for Geotechnics, Ohrid, North Macedonia, 23-25. 06. 2022, Macedonian Association for Geotechnics (2022)
-
Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?
Nikola Stanković, Taras Gerya, Vladica Cvetković, Vesna Cvetkov. "Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?" in EGU General Assembly 2024, Vienna, 14-19 April 2024, Göttingen : Copernicus GmbH (2024). https://doi.org/10.5194/egusphere-egu24-568
-
Geneza i uslovi cirkulacije voda kompleksnih karstnih sistema Kučajsko-Beljaničkog masiva
Ljiljana M. Vasić (2017-07-14)postupaka koji je primenjen u cilju definisanja zona prihranjivanja i veze izmeđupodzemnih i površinskih voda, vremena koje voda provede u podzemlju, pri čemu seformira jedinstven hemijski sastav i temperaturni režim isteklih voda, bili su polaznaosnova za usmerenje na istraživanje karsta i definisanje teme doktorske disertacije.Kučajsko-beljanički masiv se nalazi u istočnoj Srbiji i pripada oblasti Karpatobalkanskogluka i idealan je poligon za istraživanje, obzirom da se u okviru njega nalazejaka karstna vrela i pojave toplih karstnih izvora na relativno malom rastojanju, ...karstni sistemi, geneza podzemnih voda, izotopske metode, starost voda,hidrogeohemijski procesi, dubina cirkulacije podzemnih voda, subtermalne i termalnevode... sedimentary rock aquifer system.” Journal of Hydrology 353, pp. 294-313 9. Craig H. (1961a) Standard for reporting concentrations of deuterium and oxygen -18 in natural water, Science, 133(3465): pp. 1833–1834 10. Craig H. (1961b) Isotopic variations in meteoric waters, Science 133 (3465): pp. 1702–1703 ...
... 1556/24.58.2015.1– 2.1; Vol. 58/1–2, pp. 1–27 108. Trček B., Zojer H. (2010) Recharge of springs, Groundwater hydrology of springs (eds. N.Kresic & Z.Stevanovic), Elsevier, Blumington & Oxford, pp. 87- 127 109. Urey H., Brickwedde, F. G., Murphy, G. M. (1932) An isotope of hydrogen of mass ...
... doticaju reke u ponor od 120 l/s, kada je ubačeno svega 1 kg obeleživača. Boja se pojavila nakon 172 sata, što ukazuje na brzinu kretanja od 46 m/h. Veza ponora Žagubičke Rečke sa vrelom Buk utvrđena je 1954. godine (J. Petrović). Nakon ubačenih 1.5 kg obeleživača u ponor pri brzini proticaja ...Ljiljana M. Vasić. "Geneza i uslovi cirkulacije voda kompleksnih karstnih sistema Kučajsko-Beljaničkog masiva" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2017-07-14)
-
Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs
Saša Milanović, Ljiljana Vasić (2021)Saša Milanović, Ljiljana Vasić. "Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs" in Hydrogeology Journal, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10040-020-02280-1
-
Просторни положај лежишта угља Ђурђевик: геофизичко-геолошки модел
Синиша Арсеновић (2019)Лежиште угља Ђурђевик представља источни део Бановићког угљеног басена и припада северној страни босанске офиолитске зоне унутрашњих Динарида у чији састав улазе стене палеозојске, мезозојске и кенозојске старости. Језерска доњомиоценска угљоносна серија изграђена је од лапоровито-глиновитих седимената са једним слојем мрког угља. Дебљина угљеног слоја креће се у интервалу од 5 до 25 m са генералним правцем пружања СЗ - ЈИ и падом према ЈЗ. У зони обухваћеноj геофизичким истраживањима изражена je пострудна тектоника у виду раседа мањег и ...... границама 0 s – 0 m – 0 m; 0,6 s – 250 m – 250 m за позицију Х = 250 m) дефинисани су улазни параметри за процес миграције сеизмичких податка. Табела 3.3. - Дефинисање параметара PSDM миграције Параметар Од До Координате профила, Х оса 0 m 500 m Координате профила, Y osa 0 m 0 m Излазна секција ...
... попримити облике: - y1 = A ⋅ cos k(x − x1) , - y1 = A ⋅ cos k ( x−V ∙ t1), - y1 = A ∙ cos (k ∙ x − k ∙ V ∙ t1). Фазни угао је промењен за: ϕ = −h ⋅ x1 = k ⋅ V ⋅ t1 (3.8) 23 3.2 Израда синтетичког геолошког модела Израда синтетичког модела се заснива на подацима прикупљеним ...
... првој средини. За случај хоризонталне границе, крива која спаја времена појаве сигнала на CMP траговима има облик хиперболе којој се теме налази у Х=0. Ово је случај када се извор таласа и пријемник (геофон) налазе на истој тачки. Једначина хиперболе гласи: Tx2 = T02 + X2V2 (3.10) где је: ...Синиша Арсеновић. Просторни положај лежишта угља Ђурђевик: геофизичко-геолошки модел, Београд : Рударско-геолошки факултет, 2019
-
Keyword Extraction from Parallel Abstracts of Scientific Publications
... Language in the Digital Age. META-NET White Paper Series. Springer, Heidelberg (2012). https://doi.org/10.1007/978-3-642-30755-3. Rehm, G., Uszkoreit, H. (Series eds.) 18. Krstev, C., Vitas, D., Stanković, R.: A lexical approach to acronyms and their definitions. In: Mariani, Z.V.J. (ed.) Proceedings ...
... keyphrase extraction. In: Proceedings of the 2004 Conference on Empirical Methods in NLP, pp. 1318–1327 (2009) 25. Lahiri, S., Mihalcea, R., Lai, P.-H.: Keyword extraction from emails. Nat. Lang. Eng. 23(2), 295–317 (2016) 26. Kim, S.N., Medelyan, O., Kan, M.-Y., Baldwin, T.: SemEval-2010 task 5: auto- ...Slobodan Beliga, Olivera Kitanović, Ranka Stanković, Sanda Martinčić-Ipšić . "Keyword Extraction from Parallel Abstracts of Scientific Publications" in Sematic Keyword-Based Search on Structured Data Sources - Third International KEYSTONE Conference, IKC 2017 Gdańsk, Poland, September 11–12, 2017 Revised Selected Papers and COST Action IC1302 Reports, Springer (2017)
-
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 ...... index is calculated as the proportion of individual energy sources, n, relative to the total number of energy sources, N: ( ) 1 ln , n i i i i n H P P P N= = − =∑ (11) The higher value of Shannon index, the greater is the diversity of observed groups of elements. Results of Shannon index for ...
... 3.06.02016%20ENERGY%20SECTOR%20DEVELOPMENT%20 STRATEGY%20OF%20THE%20REPUBLIC%20OF%20SERBIA.pdf [16] Beals, M., et al., Diversity Indices: Shannon’s H and E, The Institute for Environmental Modeling, Uni- versity of Tennessee, Knoxville, Tenn., USA, 2000 [17] ***, UK Energy Sector Indicators 2012, ...Boban Pavlović, Dejan Ivezić. "Availability as a dimension of energy security in the Republic of Serbia" in Thermal Science, National Library of Serbia (2016). https://doi.org/10.2298/TSCI160923303P
-
Classification of mining waste landfills according to legislation in Serbia
... koji sadr- že opasne supstance“ (01 04 07*) se karakterizuju kao opasni otpadi samo ako sadrže opasne materije iznad graničnih vrednosti predloženih H listom Pravilnika o kategorijama, ispitivanju i klasifikaciji otpada (Sl. glasnik RS, br. 56/2010, 93/2019 i 39/2021) [23]. Tek pošto se prethodno ...
... Pollution, vol. 228, no. 7, pp.1-12., 2017. [16] Sánchez, Luis Enrique, K. Alger, L. Alonso, F. Barbosa, M. C. W. Brito, F. V. Laureano, P. May, H. Roeser, and Y. Kakabadse: Impacts of the Fundão https://-ec.europa.eu/-environment/pdf/-wa-ste/mining/mwfs_report_dec_07.pdf https://-ec.europa. ...Dragana Nišić, Uroš Pantelić, Nikoleta Aleksić, Neda Nišić. "Classification of mining waste landfills according to legislation in Serbia" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2021). https://doi.org/10.5937/tehnika2105575N
-
Distribution of major and trace elements in the Kovin lignite (Serbia)
Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...... D., SIMIĆ, V., GRŽETIĆ, I. & LORENZ, H. (2015): Potentially toxic trace elements in some Serbian brown coals.– Reports of the Serbian Geological Soci ety (for the year 2015), 1–14. Serbian Geological Society, Belgrade, ISSN 0372 9966. ŽIVOTIĆ, D., WEHNER, H., OSTERTAGHENNING, C., ERCEGOVAC, M. ...
... contents (daf) are similar in all three seams, averag ing at 64.78%, 64.40% and 64.96% for coal seams I, II and III, respectively (Table I). The average H contents (daf) are 4.64%, 4.91% and 4.55% for coal seams I, II and III, respectively, while the respective O contents (daf) are 25.90%, 27.05% and 27 ...
... backscatter images with EDS data of minerals; a) albite; b) K-feldspar; c) muscovite; d) Cr-rich chlorite; e) epidote; f ) gypsum/anhydrite; g) barite; h) Fe oxide/hydroxide. G eo lo g ia C ro a tica Životić et al.: Distribution of major and trace elements in the Kovin lignite (Serbia) 59 Figure ...Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović. "Distribution of major and trace elements in the Kovin lignite (Serbia)" in Geologia Croatica, Croatian Geological Survey (2019). https://doi.org/10.4154/gc.2019.06
-
Using Lexical Resources for Irony and Sarcasm Classification
The paper presents a language dependent model for classification of statements into ironic and non-ironic. The model uses various language resources: morphological dictionaries, sentiment lexicon, lexicon of markers and a WordNet based ontology. This approach uses various features: antonymous pairs obtained using the reasoning rules over the Serbian WordNet ontology (R), antonymous pairs in which one member has positive sentiment polarity (PPR), polarity of positive sentiment words (PSP), ordered sequence of sentiment tags (OSA), Part-of-Speech tags of words (POS) ...... Modelling sarcasm in twitter, a novel approach. In Association for Computational Linguistics. 50–58. [5] Christian Burgers, Margot van Mulken, and Peter Jan Schellens. 2013. The use of co-textual irony markers in written discourse. Humor 26, 1 (2013), 45–68. [6] Konstantin Buschmeier, Philipp Cimiano ...Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković. "Using Lexical Resources for Irony and Sarcasm Classification" in Proceedings of the 8th Balkan Conference in Informatics (BCI '17), New York, NY, USA, : ACM (2017). https://doi.org/
-
Softverski alati za korišćenje resursa za srpski jezik
Ivan Obradović, Ranka Stanković (2008)... Process- ing of Serbo-Croatian”, in Formal Description of Slavic Languages: The Fifth Conference, Leipzig 2003, Zy- batow, Gerhild et al. (eds.), Peter Lang: Frankfurt am Main, pp. 3-17. Mohri, M. (1997) “Finite-state transducers in language and speech processing”, Computational Linguistics, vol. ...Ivan Obradović, Ranka Stanković. "Softverski alati za korišćenje resursa za srpski jezik" in INFOteka: časopis za informatiku i bibliotekarstvo, Belgrade, Serbia : Zajednica biblioteka univerziteta u Srbiji (2008)
-
Збирка задатака из Механике 1 и Отпорности материјала
Aна Петровић, Инес Гроздановић (2023)... Tauky 4. Kpak cHuIe 3a Tauky A A HHje Kpak cHJIe F Cnuka 1.20 Kpak cune 18 CucrTeMu cuna KpaK cHune Ry (Isin aq) Kpak cuHje S (h sin a) y A KpaK cwute G (I/2 cos q) Cnuka 1.21 Kpauu ceux cuna (3a mauky A) koje Genyjy Ha uimarn Ha Cnuuu 1.22 npuka3aHMi cy cCMepoBUM MOMeHaTa ...Aна Петровић, Инес Гроздановић. Збирка задатака из Механике 1 и Отпорности материјала, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2023
-
Projection of SO2 emissions in coal power plants in Serbia
Aleksandar Madžarević, Predrag Jovančić, Stevan Đenadić, Filip Miletić, Miodrag Ristović, Miroslav Crnogorac (2023)The production of electricity in the countries of South-Eastern Europe (SEE) was mainly related to the use of coal, predominantly lignite. The total installed capacity of thermal power plants using coal in these seven countries is 17.813 MW, distributed in 31 thermoblocks. The mentioned plants are the dominant pollutant emitters in all observed countries. Data on the largest emitters in the countries of the European Union and a comparison with SEE countries were collected. The calculation of emissions of ...... Projection of total calorific value 24.000.000 GJ - period 2023-2040 | 120 · + E o [ % Hi 100 c = o ·š 20 j Projection emission without desulfurization H r_ M i L_ ___------">~ ~.~ E [] TT C--- ” TO------ u [ {average emission 86.424 tSO2) - period 2020-2040 | 80 F as 60 10 j 40 ——Total calorific ...Aleksandar Madžarević, Predrag Jovančić, Stevan Đenadić, Filip Miletić, Miodrag Ristović, Miroslav Crnogorac. "Projection of SO2 emissions in coal power plants in Serbia" in 9th International Conference Mining and environmental protection, Sokobanja 24-27th May 2023., Belgrade : University of Belgrade, Faculty of Mining and Geology (2023)