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Упит dcterms_subject_txt:Проблем p-центра

854 items

  • Preparation of Multimedia Document “YU Rock Scene”

    Milena Obradović, Aleksandra Arsenijević, Mihailo Škorić (2017)
    SUMMARY: This study will present the preparation process of a multimedia document entitled YU ROCK SCENE in which participants were senior students of undergraduate studies of the Department of Library and Information Science at the University of Belgrade Faculty of Philology during the academic year 2014/2015, as a part of the subject Multimedia Documents. This study gives an overview of the historical development of rock and roll in the territory of the former Yugoslavia, rock scene in Yugoslav republics, ...
    multimedia document, library science, information science, rock and roll, music, Yugoslavia
    ... members and events in which they participated are listed, as well as their complete discography. 2.1 YU Rock Scene in Serbia Belgrade was the Serbian centre for establishment, operation of a large number of bands and affirmation of solo performers. During the 1960s, the following bands appeared: Zlatni ...

  • Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation

    Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2023)
    The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...
    otpadne vode, toplotna pumpa, daljinsko grejanje, simulacija

  • Towards the semantic annotation of SR-ELEXIS corpus: Insights into Multiword Expressions and Named Entities

    Cvetana Krstev, Ranka Stanković, Aleksandra Marković, Teodora Mihajlov (2024)
    Овај рад представља активности на развоју корпуса ELEXIS-sr, српском додатку вишејезичном анотираном корпусу ELEXIS-а, који се састоји од семантичких анотација и репозиторија значења речи. ELEXIS је паралелни вишејезични анотирани корпус на десет европских језика, који може да се користи као вишејезички репер за евалуацију европских језика са мање и средње развијеним ресурсима. Фокус овог рада је на вишечланим изразима и именованим ентитетима, њиховом препознавању у скупу реченица ELEXIS-sr и поређењу са анотацијама на другим језицима. Разматрају се први кораци ...
    полилексемске језинице, именовани ентитет, вишезначност значења речи, складиште смисла, LLOD

  • INVENTS: A Hybrid Mine Ventilation Planning and Design System

    Lilić Nikola, Stanković Ranka, Obradović Ivan (2013)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    hybrid systems, mine ventilation, expert systems
    ... complex problems in order to obtain efficient communication between the symbolic and the numerical part of the system. In order to cope with this problem a separation of processes in coupled systems into independent modules is suggested. Furthermore, information interchange, i.e. communication among ...
    ... ented approach implemented as a system of frames offers a suitable formalism for the proposed decomposition of the ventilation state evaluation problem, since they both posses a hierarchical structure. The outlined features of the knowledge base alleviate both the coordination of knowledge within ...
    ... technology available for MS Windows applications. It enables a straightforward and easy manipulation of input data and control over parts of the problem-solving process. It also offers suggestions and recommendations to the user for the improvement of the overall performance of the mine ventilation ...

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    ... complex problems in order to obtain efficient communication between the symbolic and the numerical part of the system. In order to cope with this problem a separation of processes in coupled systems into independent modules is suggested. Furthermore, information interchange, i.e. communication among ...
    ... ented approach implemented as a system of frames offers a suitable formalism for the proposed decomposition of the ventilation state evaluation problem, since they both posses a hierarchical structure. The outlined features of the knowledge base alleviate both the coordination of knowledge within ...
    ... technology available for MS Windows applications. It enables a straightforward and easy manipulation of input data and control over parts of the problem-solving process. It also offers suggestions and recommendations to the user for the improvement of the overall performance of the mine ventilation ...

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...
    debris flow, modelling, SPH code, DEM
    ... numerical approach to the testing of fusion process’’. Astronomical Journal 1977; 82:1013–1024. Pastor, M., Fernández Merodo, J.A., Herreros, I., Mira, P., González, E., Haddad, B., Quecedo, M., Tonni, L., Drempetic, V. (2008) ‘’Mathematical, constitutive and numerical modelling of catastrophic landslides ...

  • Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac (2023)
    ... Equation (5) can be written in the form: — %* — · R whereby integration, it is obtained: v Av AR — ~-n·| —,,respectively: logv=logR" +logC; j v j R p y: 108 ii Š (6) where C is a constant of integration. Equation (6) can be written in the form: logv=logC·R"; () 4. MODELS FOR DETERMINING PARAMETERS ...

  • Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia

    Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić (2023)
    Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the local community. On the example of the "Valjevo" B-Li deposit, data on structural settings and previous hydrogeological investigations were combined with the results of resource drilling and geophysical ...
    Geothermal assessment, Mineral deposit exploration, Geothermal potential, Serbia
    ... 2N - 4, 90 8, 00 0 N = -ON a jE /Ž | aA Ž .;/ • - ELB drihole ———= Miocene base isoline 4, 90 4, 00 0 4 T; š Miocene basement a P Taž Limestone T2! Dolomitic limestone T, Limesotne, sandstone, claystone Figure 2. Structural and geological interpretation of the basement of ...

  • Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons

    Mihailo Škorić (2017)
    The goal of this paper is to draw attention to the possibility of using emoticon-riddled text on the web in language-neutral sentiment analysis. It introduces several innovations in the existing framework of research and tests their effectiveness. It also presents a software tool especially made for that purpose, explains how it builds a database with sentimental value of terms and offers the user manual. Finally, it presents a software tool that tests the new database and gives some examples ...
    data mining, information extraction, emotions, text on the web
    ... character set, but also cropped Latin6, a problem occures where strings istraživanje (research) and istazivanje (research) will not be recognized as same, but different words. Converting all characters into ASCII set resolves this problem but introduces a new problem where words that would differ in Unicode ...
    ... “Classification Based on Emoticons”, pp. 67–91 determiner meaning value determiner meaning value :)) smile 0.56 :) smile 0.26 :D grin 0.91 :P tongue out 0.35 :p tongue out 0.24 xD grin 0.59 :o wonder -0.22 :O wonder -0.29 :(( sad face -0.86 :( sad face -0.66 :/ peeve -0.48 :\ peeve -0.48 :** kisses ...
    ... can not be sure that the absence of determiners really bears (negative) meaning, and the assessment of value is also difficult task. An additional problem is that the message may contain a determiner that was not used in the text mining tab. Therefore, this possibility is op- tional, and the value it ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... br. 16, str. 47-56, RGF Beograd. [10] Savić M., (2000): Miniranje na površinskim kopovima, Monografija, RTB Bor Institut za bakar Bor, Indok centar, Bor, str. 317. ...

  • A Description of Morphological Features of Serbian: a Revision using Feature System Declaration

    Cvetana Krstev, Ranka Stanković, Vitas Duško (2010)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    Morphology, Lexicon, lexical database, Standards for LRs
    ... standard for involved languages for many years. They can be grouped in several categories. (a) The lack of a value for an existing category. This problem occurred, for instance, with the grammatical category number. The values for this category for nouns are singular and plural (shared by all involved ...
    ... were promenading up and down the wharves, among the crowd of natives and strangers who were sojourning at this once straggling village… This problem was in the past solved by adding the missing values in the new MULTEXT-East versions. (b) The lack of a category. In Serbian, gender of nouns is ...
    ... u velikom salonu Reform-kluba. The five antagonists of Phileas Fogg had met in the great saloon of the club. The solution to this kind of problem asks for addition of new categories that was not encouraged by MULTEXT-East in the past. (c) The interdependence of values and categories. In ...

  • Dimenzionisanje deponija za ugalj

    Dinko Knežević, Božo Kolonja, Ranka Stanković, Aleksandra Tomašević, Dragana Nišić (2014)
    ... potražnja za električnom strujom iz termoelektrana je najveća pa je ovo bitan parametar za dimenzionisanje deponije. Treća važan činilac su havarije i problemi izazvani prirodnim katastrofama (poplave, klizišta). Događaji iz maja i juna 2014.g. pokazali su da to može izazvati značajan poremećaj na elek ...
    ... učestvuju u određivanju veličine deponija uglja. U svetu se svakako o tome vodi računa. Sve u svemu, određivanje veličine deponije je kompleksan problem. U staroj SFRJ izrađen je predlog Pravilnika o administrativno-tehničkom određivanju veličine deponije [2]. Taj pravilnik nikada nije zaživeo, a ...
    ... ar t A pr il M aj Ju n Ju l A vg ust S ep te m ba r O kt oba r N ove m ba r D ece m ba r mesec od no s pr oi zv od nj e i p ot ro šn je u gl ja , h ilj ad a to n a Tabela 2. Količina uglja koja se odlaže na deponiju TENT-B Godina Količina uglja dovezena u ...

  • Developing Students’ Mining and Geology Vocabulary Through Flashcards and L1 in the CLIL Classroom

    Lidija Beko, Ivan Obradović, Ranka Stanković (2015)
    ... if judicious, can serve to scaffold language and content learning in CLIL contexts, as long as learning is maintained primarily through the L2” (p.17). The supporters of periodical usage of L1 in the CLIL classroom (Auerbach 1993; Littlewood and Yu 2011; Guk and Kellogg, 2007; Storch and Aldosari ...

  • 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
    ... alternativa [4,5]. Višekriterijumsko odlučivanje (VKO) (engl. Multiple Criteria Decision Making – MCDM) je oblast operacionih istraživanja i bavi se problemima u kojima je pri definisanju odluke prisutno suočavanje sa većim brojem, najčešće suprotstavljenih kriterijuma [6.7]. U VKO svi faktori koji utiču ...
    ... učinaka ugljenih sistema korišćene su dve metode, VIKOR i TOPSIS metoda. 3.1 VIKOR metoda Metodu VIKOR razvio je Serafim Opricović, za potrebe rešavanja problema u odlučivanju prilikom razmatranja konfliktnih i raznorodnih kriterijuma koji utiču na donošenje odluke. Metoda se zasniva na pretpostavci da je kompromis ...
    ... Berlin, Heidelberg, pp. 58-191; [7] Sitorus, F., Cilliers, Jan J., Pablo, R., & Brito-Parada, R. (2019). Multi-criteria decision making for the choice problem in mining and mineral processing: Applications and trends. Expert [8] Bazzazi, A. A., Osanloo, M., & Karimi, B. (2011). Deriving preference order of ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... and the utility plant is a complex problem owing to the variable nature of coal properties (heating value, sulfur, ash), even within the same coal seam. Due to the fluctuation of the coal quality, mine planning and coal homogenization are in fact an optimization problem under uncertain conditions. To deal ...
    ... deal with these issues a stochastic optimization model is developed for an illustrative coal homogeniza- tion problem. Mining block grades from an optimized mining schedule are used to simulate any given homogenization process in stockpiles throughout the mine's life. Sulfur content is treated as lognormally ...
    ... integral able function is bounded, the variance of the estimate decreases as 1/(n)1/2. Now, let Cp(X) be the characteristic function of the polygon P. For each point, this function gives value 1 if that point is in the polygon and value 0 if the point is out of the polygon. This function can be calculated ...

  • Analiza rada električnih centrifugalnih pumpi

    Milica Stanojević (2024)
    Ovaj rad analizira rad električne centrifugalne pumpe (ESP) u naftnoj industriji, sa fokusom na problem taloženja kamenca (karbonatnih naslaga) unutar sistema. Električne centrifugalne pumpe (ESP) predstavljaju srce mnogih naftnih bušotina. Njihova visoka pouzdanost i sposobnost rada u zahtevnim uslovima čine ih neophodnim za stabilnu i kontinuiranu proizvodnju.Senzori igraju ključnu ulogu u praćenju rada ESP sistema i detekciji ranih znakova taloženja kamenca. Problem taloženja kamenca je izuzetno značajan, jer može dovesti do smanjenja efikasnosti pumpe, povećanja troškova održavanja, i dugoročnih zastoja ...
    električne centrifugalne pumpe (ESP), formiranje kamenca (karbonatnih naslaga), hemijski inhibitori
    ... nego za dubinsko pumpanje. Mogućnost primene u kosim bušotinama uz eventualne probleme koji uglavnom nastaju zbog oštećenja kabla i pumpe. Otežan problem rešavanja parafina u stubu bušotine. Uglavnom se ovaj problem rešava primenom toplotno-hemijskih metoda. Prisustvo čvrstih materija i peska ...
    ... merenje pritiska na dnu bušotine se izvodi na relativno lak način. Nagib bušotine ne predstavlja problem. Primenjiva za „off-shore“ bušotine. Hemijski tretmani u cilju rešavanja operativnih problema (talozi soli i parafina, emulzije i korozija) lako se izvode. Zavisno od uslova u bušotini mogu ...
    ... veća od gustine ulja u motoru koja iznosi 850 kg/mš. Problem kod ovog tipa konstrukcije je upravo navedeni kontakt između fluida koji može dovesti do „vlaženja“ ulja što uzrokuje degradaciju njegove dielektričnosti. Isto tako jedan od problema je mogućnost prodiranja gasa u ulje te uzrokovanja ...

  • A Tel Platform Blending Academic And Entrepreneurial Knowledge

    Ivan Obradović, Ranka Stanković, Jelena Prodanović, Olivera Kitanović (2013)
    ... affordable way "is a demanding task, which requires creativity and a significant amount of expertise. Designing for effective learning is a complex problem involving the design of learning tasks, learning resources and divisions of labor that enable each learner to learn effectively." [4] There is ...
    ... stage the students with tendencies/talent to share knowledge, and motivate them to work as teacher assistants (TA) and also publish their own problem examples as video tutorials. Finally, the platform will provide cost effective practical experience for the students through implementation of ...
    ... 87-110. [3] Bissell, A. N. (2009). Permission granted: open licensing for educational resources. Open Learning, 24(1), 97-106. [4] Goodyear, P., & Retalis, S. (Eds.) (2010). Technology-Enhanced Learning, Design Patterns and Pattern Languages. Sense Publishers. [5] Open Consortium Europe ...

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)
    ... of the Republic of Serbia, within the research program in the technological development area for the period 2011-2014. LITERATURE [1] Burrough P. A., McDonnel R. A., [2006]: Principi geografskih informacionih sistema – drugo izdanje, Prostorni informacioni sistemi i geostatistika. Beograd : ...

  • Дефинисање археолошких објеката на локалитету Кремените њиве применом Ојлерове 3Д деконволуције на магнетометријске податке

    Весна Цветков, Илија Васиљевић, Бранислав Сретеновић, Весна Дамњановић (2018)
    ...  gvozdeni artefakti (koji su najmagnetičniji  i najlakše se detektuju ovom metodom). U  nekim slučajevima, savremeni metalni ostaci predstavljaju veliki problem u magnetometrijskim ispitiva‐ njima, dok nekad, ako su oni cilj istraživanja, ovo predstavlja veliku prednost.  Magnetometrijska  ispitivanja arheoloških  ...
    ... d streets), iron artefacts (which are  the most magnetic and easiest detected by this method). In some cases, modern metal residues pose a  major problem in magnetic investigations, while sometimes, if they are the goal of the research, this is a  great advantage.  Magnetic investigations of archae ...
    ...  176016).    LITERATURA / REFERENCES    Bastani, M., Kero, L., 2004. Test of the analytical signal technique and Euler deconvolution on Fosmark  data. P‐04‐283, Swedish Nuclear Fuel and Waste Management Co., Stockholm, Swedish. 51 pp.  Eppelbaum, L., 2015. Quantitative Interpretation of magnetic anoma ...

  • Integrisanje heterogenih leksičkih resursa

    Ranka Stanković, Cvetana Krstev, Duško Vitas, Ivan Obradović, Gordana Pavlović-Lažetić (2004)
    Osnovna aktivnost Grupe za obradu prirodnih jezika na Matematičkom fakulteta Univeziteta u Beogradu je usmerena na razvoj različitih resursa za obradu srpskog jezika. Među njima su posebno značajni sistem morfoloških rečnika srpskog jezika razvijenih u okviru mreže RELEX [1] i semantička mreža (tipa wordnet) za srpski jezik razvijena u okviru međunarodnog projekta Balkanet. Radi se o dva heterogena leksička resursa, razvijena na osnovu sasvim različitih modela, koji samim tim sadrže i različite vrste leksičkih informacija. Integracijom ovih resursa, informacije ...
    lekisički resursi, obrada prirodnog jezika, rečnici
    ... korišćenja SWN u pretraživanjima. U velikom broju slučajeva ove dodatne informacije mogu da se koriste za uklanjanje dvoznačnosti, odnosno rešavanje problema homonimije. Morfološke, sintaktičke i semantičke informacije mogu se preuzeti iz srpskog MR prostih oblika reči i pridružiti rečima odgovarajućeg ...
    ... leme cyelo 5. Zaključak Postupak opisan u ovom radu se pokazao kao koristan za obe vrste resursa. U svakom slučaju, treba istaći i određene probleme u njegovoj primeni. Za početak, veličina srpskog MR i srpskog WN nije uporediva. Razvoj srpskog MR je započet više godina pre WN, tako da on potpunije ...
    ... brojne složene reči kao npr. usmeni ispit:1, sa svojim, posebnim pravilima izvođenja. Sa povećanjem srpskog morfološkog rečnika složenih reči ovaj problem će biti umanjen. Konačno, razvijeni alat ne izvršava ove zadatke automatski, mada je takva mogućnost razmatrana. S obzirom na to da se klasični ...