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Упит dcterms_subject_txt:Groundwater modeling

295 items

  • Дефинисање хидрауличког механизма истицања карстних подземних вода применом биваријантне анализе временских серија

    Вељко Мариновић (2022)
    Bivariate analysis was applied within the cross-correlation in time and the gain function as part of the cross-spectral function in the frequency domain, to the time series of precipitation and discharge of the Oko Bijela and Bosna karst springs in the period 2015-2020. Bivariate analysis showed a very fast reaction of the Oko Bijela spring and a reaction delay at the Bosna spring, which indicate a very weak amortization of the input signal within the Oko Bijela system and ...
    карст, подземне воде, механизам истицања, крос-корелација, спектрална анализа

  • Uticaj utiskivanja gas-lift gasa na prenos mase i toplote

    Branko Grubač (2019)
    Nakon uvođenja kontinualnog gas-lifta, primećen je porast proizvodnje tečnog naftnog gasa, TNG, u postrojenju za preradu gasa, kao jednog od finalnih proizvoda dobijenog iz fluida gaso kondenzatnih i rastvorenog gasa iz naftnih bušotina. Pretpostavljeno je da se prisustvom gas-lift gasa uspostavlja drugačija ravnoteža faza u odnosu na slučaj bez gaslifta, te da je gas-lift gas stripovao propan i butane iz tečne u parnu fazu, što je dovelo do povećanja prinosa TNG-a. Napravljen je model bušotine koja radi u kontinualnom gas-liftu ...
    gas-lift, modelovanje bušotine, prenos mase i toplote, taloženje parafina
    ... precipitation of paraffins begins at greater depths and that the amount of deposit is higher in the gas-lift well. Key words: gas-lift, well modeling, mass and heat transfer, paraffin deposition Scientific area: Mining engineering Scientific subfield: Elements of mechanical and energy systems ...
    ... Bobok, Flow and heat transfer in geothermal systems, Chepter 9, Elsevier, str 181-194, (2017) [22] H. Rahnema , J. You, M. McMillan, Numerical modeling of unsteady-state wellbore heat transmission, Journal of natural gas science and engineering, Vol. 34, str 1062- 1076, (2016) [23] Wanqiang Xiong ...
    ... profiles in gas - lift wells, Society of petroleum engineers, Production & facilities, (1996) [40] A. Hasan, C. Kabir, Wellbore heat-transfer modeling and applications, Journal of Petroleum science and engineering, str 179-185, (2012) [41] C. Kabir, A Hasan, Performance of a two-phase gas/liquid ...

  • Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation

    Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer (2021)
    kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje
    ... types of tectonic deformation—extension, shortening and strike-slip—contribute to the cumulative deformation, documented through physical analogue modeling. A PIV-derived classification of the type of strain can so complement visual inspection of the type of faulting (e.g. as in Willingshofer & Sokoutis ...
    ... ns of those. In this paper we will discuss various deformation tensors that are common, infinitesimal strain, or less common in the geophysical modeling literature, finite strain and finite stretch. We will argue which tensors are best suited to describe large deformation and classify deformation ...
    ... setup merely serves as the proof of concept for our strain analysis; further developed experiments are part of Krstekanić et al. that compares modeling results to natural cases of curved strike-slip systems at the lateral ends of a rigid indenter. D o w n lo a d e d fro m h ttp s ://a c a ...

  • Arsenic in tape waters of the south Pannonian basin (Serbia) and arsenic risk assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    ... the aquifer. An anoxic state of groundwater increases arsenic mobility [14]. Based on a review of different literature sources, regions featuring high arsenic concentrations are generally associated with groundwater in geothermal areas or with low-temperature groundwater systems. Given that the sub- ject ...
    ... for As, it is equal to 1.5 mg/kg·day. Results and Discussion Quality of Groundwater The quality of groundwater used for drinking water sup- ply in the South Pannonia Basin is considered to be condi- tionally poor. Groundwater suitable for public water supply is found only up to a depth of 300 m, possibly ...
    ... fluorides (0.1-1 mg/L) are low compared to the usual levels found in groundwater [35]. Maximum arsenic concentrations in groundwater used for drinking water supply were recorded in Central Banat (217 µg/L). Arsenic concentrations in groundwater did not significantly correlate with depth, but a stratum tapped ...

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija
    ... quantitative factors. Symmetry 2020, 12, 908 3 of 42 1.2. Energy Security and Fuzzy Theory Fuzzy theory finds its purpose in the analysis and modeling of complex systems, starting from the idea that complex problems can be solved if instead of rigor and greater accuracy of descriptions of certain ...
    ... about energy security and different approach of analysis and assessment of energy security; Section 2 explains the rationale and the principles for modeling energy security with the fuzzy–AHP synthesis model for Symmetry 2020, 12, 908 4 of 42 analysis energy security of the gas sector. This section ...
    ... ranking data are used as input data to the fuzzy set, which is further analyzed in the fuzzy composition process. Fuzzy compositions represent a step in modeling using fuzzy set theory in which the process of integration and synthesis of partial influences at the synthetic level is performed. The process of ...

  • Uticaj voda Dunava na formiranje kvaliteta podzemnih voda u zoni Apatina

    Bojan Hajdin, Željko Kljajić, Vesna Ristić-Vakanjac, Milojko Lazić, Marina Čokorilo-Ilić (2018)
    Područje Apatina u proteklom periodu često je pominjano u razvojnim vodoprivrednim strategijama kao potencijalno perspektivna lokacija za izgradnju izvorišta duž obale Dunava, koje bi moglo da ima regionalni značaj. Ovim rešenjem trebao bi se prevazići problem lošeg kvaliteta vode za piće na celom području severne Bačke, tako što bi se kvalitet podzemne vode poboljšao zahvatanjem infiltriranih rečnih voda u priobalju Dunava. Istraživanjima koja je Departman za hidrogeologiju, Rudarsko-geo¬loškog fakulteta vršio tokom poslednjih 13 godina na izvorištima za vodosnabdevanje grada ...
    vodosnabdevanje, osnovni vodonosni kompleks Vojvodine, regionalni vodovodni sistem

  • Zaštita podzemnih voda u različitim fazama istraživanja ležišta mineralnih sirovina

    Vladimir Živanović, Nebojša Atanacković (2022)
    Zaštita podzemnih voda, Primenjena geološka istraživanja, Ležišta mineralnih sirovina, Srbija

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)
    ... to create a population. They work with chromosome genotype. The population evolves toward the better chromosomes by applying genetic operators modeling the genetic processes occurring in the nature selection, recombination and mutation. Selection compares the chromosomes in the population aiming ...

  • Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude

    Ivana M. Jovanović (2016-01-13)
    U oblasti procesa prerade rude, flotacijska koncentracija predstavlja jednu od najznačajnijih i najčešće primenjivanih metoda separacije korisnih od nekorisnih minerala. Samim tim, veoma je važno osigurati uspešan rad flotacijskog postrojenja kroz dostizanje zadovoljavajućih tehno-ekonomskih pokazatelja. Cilj upravljanja procesom flotacijske koncentracije je upravo optimizacija kvaliteta i iskorišćenja korisne komponente u koncentratu uz maksimizaciju profita. Shodno tome, istraživanja na polju modelovanja i upravljanja ovim procesom zauzimaju značajno mesto u praksi kontolnog inženjenringa.Teorijska istraživanja u okviru doktorske disertacije obuhvatila su analizu položaja ...
    flotacijska koncentracija, modelovanje, upravljanje, inteligentni sistem, soft kompjuting, fazi logika, veštačke neuronske mreže
    ... A., Harris, M.C., 2007. Modeling and simulation of industrial flotation processes. Froth Flotation: A Century of Innovation (Edited by M.C. Fuerstenau, G.J. Jameson, R.H. Yoon), Publisher:SME, pp. 757–777. 101. Herbst J. A., Flintoff B., 2012, Recent Advances in Modeling, Simulation, and Control ...
    ... Massinaei, M., 2014b. Fuzzy-based modeling and control of an industrial flotation column. Chemical Engineering Communications 201 (7) pp. 896–908 119. Jahedsaravani, A., Marhaban, M.H., Massinaei, M., 2016. Application of statistical and intelligent techniques for modeling of metallurgical performance ...
    ... Columbia, 266 p. 63. El-Shall, H., Svoronos, S., Abdel-Khalek, N.A., Gruber, G., Scheiner, B., Stanley, D., Karr, C., 2001. Bubble generation, design, modeling and optimization of novel flotation columns for phosphate beneficiation. Volume I. FIPR Project No. 95-02-111, Florida Institute of Phosphate Research ...

  • A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić (2023)
    This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...
    системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFIS

  • 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

  • Groundwaters of the "Valjevo karst" area (Western Serbia)

    Petar Dokmanović, Veljko Marinović (2021)
    “Ваљевски карст” је подручје кoje заузима површину од око 780 km2, док откривени кречњак чини око 330 km2. Припада Унутрашњим Динаридима западне Србије. У литостратиграфском погледу доминирају карстификовани кречњаци средњег и горњег тријаса у којима су формиране карстне издани. Анализирани су и систематизовани доступни подаци хидрогеолошких и других релевантних истраживања. Приказана је разграната мрежа траса подземних вода између понора и дренажних пунктова, као и главне карактеристике шеснаест карстних врела (или „разбијених“ дренажних зона) и девет (група) бунара, подељених ...
    карстнa издан, трасе подземних вода, извори, бунари, издашност, вишенаменско коришћење.

  • Rudničke vode olovo-cinkovih ležišta u rudnom polju „Blagodat“ u jugoistočnoj Srbiji

    Nebojša Atanacković, Veselin Dragišić, Vladimir Živanović, Ivana Cvejić, Saša Stojadinović, Ivana Jocić (2022)
    Rudno polje Blagodat sa više ležišta i pojava olovo-cinkovih ruda nalazi se u krajnjem jugoistočnom delu Srbije, blizu granica sa Bugarskom i Severnom Makedonijom. Eksploatacija ovog resursa vrši se podzemno u okviru rudnika Grot, ranije Blagodat. Prilivi podzemnih (rudničkih) voda u jamske radove rudnika Grot su visoki i iznose oko 130 l/s (septembar 2019), što ga trenutno svrstava u najovodnjenije rudnike sa podzemnom eksploatacijom u Srbiji. Nezavisno od njih, iz obližnjeg potkopa P-1 u ležištu Kula, ističe još 25 ...
    rudničke vode, ovodnjenost rudnika, prilivi rudničkih voda, kvalitet rudničkih voda

  • The Effect of Gravel and Sand Mining on Groundwater and Surface Water Regimes — A Case Study of the Velika Morava River, Serbia

    Milan Kresojević, Vesna Ristić Vakanjac, Dragan Trifković, Jugoslav Nikolić, Boris Vakanjac, Dušan Polomčić, Dragoljub Bajić (2023)
    Овај рад описује како неконтролисано и нелегално откопавање песка и шљунка може утицати на режим површинских и подземних вода на местима где постоји активна хидрауличка веза између њих, са студијом случаја реке Велике Мораве у Србији. Такође, промена геометрије попречног профила, као последица антропогених и природних фактора, отежава уливање ове реке за укључивање у водне токове Србије. Плодност Велике Мораве омогућила би развој речног саобраћаја како за трговачке бродове, тако и за пловила Речне флотиле Војске Србије. Корелације између ...
    експлоатација песка и шљунка, режим површинског тока, режим подземних вода

  • Modeliranje buke u urbanoj sredini u okolini Doma zdravlja u Pančevu

    Stefan Mandić (2024)
    Prisustvujemo epohi gde buka predstavlja veoma rasprostranjen i moderan fenomen koji možemo deklarisati kao problem. Svedoci smo toga da moderni problemi zahtevaju malo drugačiji pristup nego u prošlosti, odnosno zahtevaju moderna rešenja. Samim tim, vremenom je došlo do modernizacije alata,u ovom slučaju došlo je do razvoja modela za rasprostiranje buke koji su se vremenom unapređivali pa tako danas imamo jedno moćno sredstvo za borbu protiv buke u vidu kompjuterskog softvera.Ovaј master rad, pod nazivom „Modeliranje buke u urbanoj sredini ...
    buka, zvuk, saobraćaj, modeliranje, merenje buke
    ... covers all the necessary steps for the successful creation of a computer model for the purposes of modeling noise propagation in industrial environments. Keywords: Noise, sound, traffic, modeling, noise measurement Modeliranje rasprostranjenosti buke u urbanoj sredini u okolini Doma zdravlja ...
    ... improved over time, so today we have a powerful tool to combat noise in the form of computer software. This master's thesis, entitled "Noise modeling in the urban environment in the vicinity of the Pančevo Health Center" contains 10 chapters, where all the necessary steps, data, methods, as ...
    ... collect the necessary data: measuring noise in the field at the location itself, counting road users, both light and heavy motor vehicles, and finally modeling the spread of the noise impact through computer software. We were able to present three scenarios in order to gain an insight into the real state ...

  • Hydrogeochemistry of Uranium in the Groundwaters of Serbia

    Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić (2015)

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... significant professional contribution. It is reflected in the solving of a number of practical problems in oil production optimization process and the modeling of a new and more efficient oil exploitation technology. Key words: oil, production, optimization, Amal, Libya. Scientific ...
    ... Gas Field Processing, CRC Press. Abdul-Wahab S., Elkamel A., Madhuranthakam C.R., Al-Otaibi M.B. (2006) Building inferential estimators for modeling product quality in a crude oil desalting and dehydration process, Chemical Engineering and Processing: Process Intensification, Volume 45, Issue ...
    ... its damage to fracture sconductivity. Nat. Gas Ind. 28(2), 99–101. Mahdi K., Gheshlaghi R., Zahedi G., Lohi A. (2008) Characterization and modeling of a crude oil desalting plant by a statistically designed approach, Journal of Petroleum Science and Engineering, Volume 61, Issues 2–4, 116- ...

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... significant professional contribution. It is reflected in the solving of a number of practical problems in oil production optimization process and the modeling of a new and more efficient oil exploitation technology. Key words: oil, production, optimization, Amal, Libya. Scientific ...
    ... Gas Field Processing, CRC Press. Abdul-Wahab S., Elkamel A., Madhuranthakam C.R., Al-Otaibi M.B. (2006) Building inferential estimators for modeling product quality in a crude oil desalting and dehydration process, Chemical Engineering and Processing: Process Intensification, Volume 45, Issue ...
    ... its damage to fracture sconductivity. Nat. Gas Ind. 28(2), 99–101. Mahdi K., Gheshlaghi R., Zahedi G., Lohi A. (2008) Characterization and modeling of a crude oil desalting plant by a statistically designed approach, Journal of Petroleum Science and Engineering, Volume 61, Issues 2–4, 116- ...

  • Hibridni sistem za planiranje i analizu ventilacije rudnika

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilacija rudnika, informacioni sistemi
    ... okviru ove knjige za fazu analize razvoja softvera usvojen je UML (Unified Modeling Language) kao standardni jezik za vizuelizaciju, specifikaciju, konstruisanje i dokumentovanje činjenica o softveru. UML (Unified Modeling Language) je jezik za modeliranje sistema koji koristi objektno-orijentisane ...
    ... analizu ventilacije rudnika 8 Kako koristiti elektronsku knjigu? Sadržaj knjige UML notacija Index About the book UML UNIFIED MODELING LANGUAGE UML (Unified Modeling Language) je stadardni jezik za specifikaciju, vizuelizaciju i dokumentaciju činjenica vezanih za softverski sistem. Korišćenjem ...
    ... Defining Aerodynamic Resistance Distribution in Ventilation Networks Modeling and Development of a Software Package for Defining Aerodynamic Resistance Distribution in Complex Mine Ventilation Networks…………………...130 CHAPTER 5 MODELING OF AIR FLOW DISTRIBUTION Air Flow Distribution………………………………………………………………… ...

  • A WebGIS Decision Support System for Management of Abandoned Mines

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)
    ... areas. Among geological factors analyzed and evaluated were geological structure and vulnerability of groundwater. The source for assessing the vulnerability of groundwater was the map of groundwater vulnerability of Serbia [14], that integrates a number of factors: the slope of the terrain and its impact ...
    ... activities in the wider area, which is particularly important for Vojvodina, as an agricultural region; and (d) water resources, both surface water and groundwater in the wider area, including hydrogeological and hydro geothermal resources. From the standpoint of environmental management, two distinct groups ...
    ... and vegetation cover, the thickness of the superficial layer, geological i.e., hydrogeological characteristics of the terrain and the level of groundwater. Sociological factors are the number of inhabitants in a radius of 500 m, 1000 m, and 2000 m, and distance from settlements. All input values were ...