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Упит dcterms_subject_txt:Numerical modeling

250 items

  • Procena poroznosti i litologije na osnovu geofizičkih merenja u severoistočnoj Rumuniji

    Manja Grifatong (2024)
    Geofizička karotažna merenja imaju važnu ulogu u određivanju fizičkih i geoloških svojstava delova Zemljine kore. Cilj ovog rada je da se prikaže procena poroznosti i litoloških karakteristika formacije na osnovu rezultata geofizičkih karotažnih merenja. Na osnovu dostupnih podataka izrađeni su dijagrami promene poroznosti sa dubinom i krosplot dijagrami neutronska poroznost – srednja gustina za dve bušotine koje se nalaze na Moldavskoj platformi, u severoistočnoj Rumuniji. Na osnovu ovih dijagrama određene su zone povećane poroznosti i litologija formacija kroz koje ...
    karotaž gustine, neutronski karotaž, dijagram promene poroznosti, kros- plot dijagram
    ... of Well Logs, Rider-French Consulting Ltd., Scotland, Second edition revised, 119-140. 10.Singha, K., D., Chatterjee, R., 2017. Rock physics modeling in sand reservoir through well log analysis, Krishna-Godavari basin, India, Geomechanics and Engineering, 13(1), 99-117. 32 11. The Plateau ...

  • Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes

    Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre (2022)
    Earth-Surface Processes

  • Univerzitet u Beogradu Rudarsko-geološki fakultet Master rad Modeliranje disperzije prašine u životnoj sredini u fazi proširenja P.K. Veliki Krivelj

    Magdalena Milanović (2024)
    Modeliranje disperzije zagađenja životne sredine predstavlja proces u kom se korišćenjem matematičkih modela vrši simulacija širenja i raspodele zagađenja u životnoj sredini, koje nastaje određenim aktivnostima. Modeliranje nam pomaže da predvidimo zagađenja koja dobijamo planiranim aktivnostima u zemljištu, vodi i/ili atmosferi određene regije, kako bi na vreme preduzeli odgovarajuće preventivne mere kojim se smanjuje ili upotpunosti eminiše uticaj na životnu sredinu i zdravlje ljudi. Glavni zadatak ovog rada je procena uticaja, projekta proširenja kopa Veliki Krivelj, na kvalitet vazduha. Rezultati koji ...
    Modeliranje disperzije zagađenja životne sredine, površinski kop Veliki Krivelj, AERMOD, zagađenje vazduha, disperzija prašine
    ... i fakultet Univerziteta u Beogradu [11] United States Environmental Protection A gency, Air Quality Dispersion Modeling, URL https://www.epa.gov/scram/air-quality-dispersion-modeling, [12] Studija o proceni uticaja na životnu sredinu projekta proširenja površinskog kopa Veliki Krivelj prema ...

  • Modeliranje sistema upravljanja zaštitom životne sredine u rudarsko-energetskim kompleksima

    Jelena R. Malenović - Nikolić (2016-07-12)
    Efikasnost funkcionisanja sistema upravljanja zaštitom životne sredine u rudarskoenergetskimkompleksima zavisi od stepena sprovođenja usvojene politike zaštiteživotne sredine i primene preventivnih mera zaštite životne sredine. Nedostatakfinansijskih sredstava za unapređivanje tehnologije eksploatacije, transporta, pripreme iprerade energetskih mineralnih sirovina u našim rudarsko-energetskim kompleksima,negativno utiče na ostvarivanje ciljeva zaštite životne sredine, a posledice radnihaktivnosti rudarsko-energetskih kompleksa dovode do smanjenja nivoa kvalitetavazduha, vode i zemljišta...
    rudarsko-energetski kompleks, životna sredina, sistem upravljanja,višekriterijumsko odlučivanje, modeliranje
    ... l Decision Making and Cultural Modeling Within and Across Populations, American Psychological Association, Psychological Review 112 (4), 2005, pp. 744 –776 177 31. Rina, K., Singh, R. P., Shashtri, S., Kamal, V., Mukherjee, S., Geochemical Modeling of High Fluoride Concentration in ...
    ... Definicije, Vrste modela, 2006 http://bib.irb.hr/datoteka /347082.modeliranje_i_simulacija_-_v2a2.pdf 16. Brimicombe, A., GIS, Environmental Modeling and Engineering, Second edition, CRC Press, 2010 17. Quinn, N.W.T., Brekke, L.D., Miller, N.L., Heinzer, T., Hidalgo, H., Dracup, J.A., Model ...
    ... MNP" Environment and Planning C: Government and Policy 30(3), 2012, pp. 487–503 24. Pearson Pearson, R., Using the International Futures Global Modeling System (IFs) for Alternative Scenarios by the Numbers, Forecasting intelligence, https://forecasters.org/pdfs/foresight/FSIssue22 pearson.pdf ...

  • Upper Miocene depositional environments of the Kikinda-Mokrin High (Serbia)

    Saša Ivanišević, Dejan Radivojević (2018)
    Exploration for oil and gas in mature areas, such as the Pannonian Basin, can benefit from reexamination of old data using more advanced modern workflows that focus on the temporal and spatial aspects of sediment deposition. Specifically, we apply a new environment of deposition model that interprets the Upper Miocene- Pliocene sediments as being deposited in a rapidly filling basin characterized by quick shelf edge progradation from the northwest toward the southeast. Reconstruction of this shelf edge trajectory reveals ...
    naftna geologija, depozicione sredine, formacije, Panonski basen

  • Assessments of effects of implementation of strategic plans for development of Belgrade District heating system

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić (2020)
    The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...
    Daljinsko grejanje, LEAP, Primarni energetski faktor, Uvozna zavisnost, CO2 emisija

  • A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment

    Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others (2020)
    Aligning senses across resources and languages is a challenging task with beneficial applications in the field of natural language processing and electronic lexicography. In this paper, we describe our efforts in manually aligning monolingual dictionaries. The alignment is carried out at sense-level for various resources in 15 languages. Moreover, senses are annotated with possible semantic relationships such as broadness, narrowness, relatedness, and equivalence. In comparison to previous datasets for this task, this dataset covers a wide range of languages ...
    lexical semantic resources, sense alignment, lexicography, language resource
    ... the Association for Computational Linguistics, 1:151–164. Matuschek, M. and Gurevych, I. (2014). High perfor- mance word sense alignment by joint modeling of sense distance and gloss similarity. In Proceedings of COL- ING 2014, the 25th International Conference on Compu- tational Linguistics: Technical ...

  • Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete

    Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)
    sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija
    ... un, S.; Ito, M.; Hiroyoshi, N.; Igarashi, T. Pyrite oxidation in the presence of hematite and alumina: I. Batch leaching experiments and kinetic modeling calculations. Sci. Total Environ. 2017, 580, 687–698. [CrossRef] 32. Park, I.; Tabelin, C.B.; Magaribuchi, K.; Seno, K.; Ito, M.; Hiroyoshi, N. ...

  • Development of an integrated model for open-pit-mine discontinuous haulage system optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)
    equipment selection, mine mechanization, expert judgment, linguistic variables, MCDM, FAHP

  • Пример мерења издашности потопљених карстних извора на примеру бране XE Вишеград

    Милан Петровић (2024)
    Главница предстојећег рада, састоји се од обраде и интерпретације података прикупљених током теренских хидрогеолошких истраживања у мају 2024. налокацији бране XE Вишеград.
    хидрогеологија, карст, брана, извори, процуривање
    ... BogodpuBpegy JapocmaB UepHu, 3aBOg 3a 6paHe, xugpoeHepieujuky, pygHukKe u caoopahajHuue, beoipag (2009) XugpoieonouiKu upodQun 6yuroluuHa- 3D conduit modeling of leakage below a dam situated in highly karstified rock, S. Milandović, Lj. Vasić, Faucity of Mining and Geology; Belgrade, Serbia (2013) ...

  • Хидрогеохемијске карактеристике и квалитет вода слива Требишњице, Република Српска, Босна и Херцеговина

    Dragoslav R. Banjak (2016-08-25)
    Упркос неповољном временском и просторном распореду, воде су најзначајнијиприродни ресурс Источне Херцеговине. Ова чињеница довела је до реализацијепројекта „Вишенамјенског хидросистема Требишњица“, којим је, премаМилановићу (2006), до сада обухваћено: седам хидроелектрана, шестакумулација, шест брана, шест тунела укупне дужине 59,7 km, неколикоприступних тунела, 62,5 km бетонског канала кроз Попово поље, канал крозДабарско (6750 m) и Фатничко поље (2770 m) и систем тунел-канал или цјевоводпрема Дубравама.У почетку са доминантним енергетским предзнаком, концепција јетрансформисана у интегрално рјешење вишенамјенског коришћења и заштитевода и животне ...
    хидрогеохемијски процеси, мултиваријантна статистичкаанализа, инверзно геохемијско моделовање, квалитет воде, употребиљивост водеза наводњавање, слив Требишњице
    ... примјеном софтвера PHREEQC version 3 (USGS) DATABASE C:\Program Files\USGS\Phreeqc Interactive 3.1.5- 9113\database\phreeqc.dat TITLE: Inverse modeling: Trebisnjica(Gorica)- vrelo Omble SOLUTION 1 temp 10.2 pH 7.56 pe 4 redox pe units mmol/l ...
    ... Mg 0.33 Na 0.19 Alkalinity 4.61 S(6) 0.02 Cl 0.17 -water 1 # kg INVERSE_MODELING 1 Inverse modeling with dilution -solutions 1 2 -uncertainty 0.05 0.05 -phases Calcite Dolomite Anhydrite ...
    ... and Herzegovina, Hydrological Sciences Journal, Volume 57, Issue 3, Pages 562-575 7. Bethke C. (2008), Geochemical and Biogeochemical Reaction Modeling, Cambridge, New York 8. Box G.E.P., Cox D.R. (1964), An analysis of transformations, Journal of the Royal Statistical Society, B26, Pages 211-234 ...

  • Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije

    Marina D. Ćuk (2018-02-23)
    Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...
    prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje
    ... laboratory methods (ICP - MS HR) during the process of collecting and analyzing data, while non- parametric statistical methods and hydrochemical modeling were applied in data processing. The uneven distribution of sampling sites (155 groundwater samples) had an impact on determining the origin of ...
    ... groundwater, different geochemical environments, hydrogeochemical conditions, a non-parametric statistical analysis, logistic model, hydrogeochemical modeling Scientific field: Geological engineering Scientific subfield: Hydrogeology UDC: 556.11:546.79(043.3) SADRŽAJ I UVOD ... ...
    ... system: correlation and evolution of tectonic units. Swiss J. Geosci. 101: 139 – 183. 144. Scott A. 2010. Sensitivity analysis of uranium speciation modeling in groundwater systems with a focus on mobility. Doctoral Dissertation. Graduate School of Clemson University, Clemson. 145. Shumway RH, Azari ...

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... MODEL FOR PREDICTION OF BLAST-INDUCED GROUND VIBRATIONS IN OPEN PIT MINES USING MONTE CARLO SIMULATION METHOD AND FUZZY LOGIC Abstract Modeling the prediction of blast-induced ground vibrations using fuzzy logic and Monte Carlo method is based on data obtained by field measurements of ground ...
    ... histories of measured vibrations. The advantages of fuzzy logic in the implementation of a much larger number of input and output variables for modeling compared to the existing empirical models are apllied. The regression model for the prediction of vibrations is obtained on the basis of identical ...
    ... been applied to determine the frequency of occurrence of ground vibration critical values for the specific blasting cases. The methodology of modeling can be applied for the prediction of vibration from blasting in all open pit mines. Keywords: model, prediction of vibrations, blasting, open ...

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... MODEL FOR PREDICTION OF BLAST-INDUCED GROUND VIBRATIONS IN OPEN PIT MINES USING MONTE CARLO SIMULATION METHOD AND FUZZY LOGIC Abstract Modeling the prediction of blast-induced ground vibrations using fuzzy logic and Monte Carlo method is based on data obtained by field measurements of ground ...
    ... histories of measured vibrations. The advantages of fuzzy logic in the implementation of a much larger number of input and output variables for modeling compared to the existing empirical models are apllied. The regression model for the prediction of vibrations is obtained on the basis of identical ...
    ... been applied to determine the frequency of occurrence of ground vibration critical values for the specific blasting cases. The methodology of modeling can be applied for the prediction of vibration from blasting in all open pit mines. Keywords: model, prediction of vibrations, blasting, open ...

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду

    главни и одговорни уредник Душан Поломчић (2016)
    Рударско-геолошки факултет
    ... u EPS-u. Rudarstvo, br. 29–32, Tehnički univerzitet u Tuzli str. 39–48. JOVANČIĆ, P., TANASIJEVIĆ, М., IGNJATOVIĆ, D., 2010: Relation between numerical model and vibration: behavior diagnosis for bucket wheel drive assembly at the bucket wheel excavator. Journal of Vibroengineering, Vol. 12 (4) ...
    ... engfailanal.2012.01.001 JOVANČIĆ, P., ĆELOVIĆ, Š., IGNJATOVIĆ, D., MANESKI, Т., 2013: Redesigning components of power transmission according to numerical model and vibration diagnostics. Journal of Vibroengineering, Vol. 15 (3), pp. 1322–1329. JOVANČIĆ, P., KOLONJA, B., IGNJATOVIĆ, D., TANASIJEVIĆ ...
    ... TODOROVIĆ K., 2014: Dynamics of landslide model with time delay and periodic parameter pertubacions. Communications in nonlinear science and numerical simulation. Elsevier. KOSTIĆ S., VASOVIĆ N., JEVREMOVIĆ D., SUNARIĆ D., FRANOVIĆ I., TODOROVIĆ K., 2014: Complex Dynamics of landslides with Time ...

  • 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 ...
    ... categorization. Mladenović and associates [18] use the same resources for document-level sen- timent polarity classification using maximum entropy modeling. Zečević and Vujičić-Stanković [27] apply various language-identification tools to distinguish Serbian among other closely related languages ...

  • Analiza primenjenih metoda za transport parafinske nafte

    Dunja Milojević (2024)
    Sadržaj parafina u nafti ima dominantan uticaj na svojstva parafinskih nafti. Taloženje parafina, odnosno taloženje čvrstih čestica parafinskog voska, predstavlja ozbiljan globalni problem tokom proizvodnje i transporta sirove nafte. Samo taloženje voska zavisi od termodinamičkih faktora, poput temperature, pritiska i sastava nafte. Transport nafte cevovodima je uobičajeni proces transporta u naftnoj industriji. Kada prilikom cevovodnog transporta parafinske sirove nafte, dođe do prekida protoka i hlađenja nafte ispod temperature stinjavanja, parafini će kristalisati, pri čemu će doći do, geliranja celokupne transportovane ...
    nafta, parafinski vosak, taloženje, transport, naftovod
    ... model - nafte. Časopis Saveza hemijskih inženjera Srbije "Hemijska industrija", 60(1-2), str. 10-14. 18.Stubsjden, M. (2013). Analytical and Numerical Modeling of Paraffin Wax in Pipelines. Norway: Norwegian University of Science and Technology. 19. Tolmač, J. (2020). Opfimizacija termičkih i hi ...

  • A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach

    Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (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 ...
    fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependability

  • 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
    ... API method does not provide accurate results. API is the result of electrical analog computer studies of sucker rod motion. This predated the numerical solution of the wave equation and was not as general. However, the analog study did describe the motion of sucker rods and the forces carried ...
    ... is the most general and the most accurate of the two methods of pumping design discussed in this chapter. The foundation of this method is the numerical solution of the wave equation for the sucker rod string. This requires knowledge of the pumping unit characteristics and assumed pump operating ...
    ... study the effect of prime mover speed variation, stuffing box friction, etc. RODSTAR also allows you to combine sophisticated rod pumping system modeling with inflow performance data for even more powerful capabilities. There are two versions of RODSTAR: deviated and vertical. This manual applies ...