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Упит dcterms_subject_txt:expert systems

520 items

  • Arsenic in Tap Water of Serbia´s South Pannonian Basin and Arsenic Risk Assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    kvalitet podzemnih voda, arsen, analiza rizika, Panonski Basen
    ... groundwater in geothermal areas or with low-temperature groundwater systems. Given that the sub- ject matter of this research was groundwater used for drink- ing water supply, the focus is on the theoretical basis of low-temperature systems. Conditions that favor arsenic migration are associated with a reducing ...
    ... structural porosities and clay interbeds that pre- vent pollutants from permeating from the ground surface. It should be noted, however, that water supply systems are comprised of relatively deep (70-250 m) drilled wells which tap Pliocene-Pleistocene sediments, while no elevat- ed arsenic concentrations were ...
    ... Faculty of Natural Sciences of the University of Novi Sad [22]. Total arsenic concentrations were measured in 470 water samples from public water supply systems from 2004 to 2009. Sampling and analyses of drinking water were per- formed at the following laboratories: at the Institute of Public Health of Vojvodina ...

  • Hidrogeotermalni resursi teritorije grada Beograda

    Ana Vranješ (2012-12-12)
    Republika Srbija je izrazito bogata hidrogeotermalnim resursima. Podzemne vode satemperaturama preko 20oC (pa do 96oC, Vranjska Banja) relativno su dobro iskorišćene.Nasuprot njima, podzemne vode sa temperaturama do 20oC do sada uglavnom nisu bilepredmet istraživanja sa bilo kog aspekta izuzev za potrebe vodosnabdevanja. Razvojemsistema toplotnih pumpi, mogućnosti višenamenskog korišćenja ovih voda značajno suuvećane.Teritorija Beograda odlikuje se značajnim resursima podzemnih voda, pre svega u okvirualuvijalnih peskovito-šljunkovitih naslaga i neogenih tortonsko-sarmatskih krečnjačkihnaslaga. Temperatura ovih voda ne prelazi 25oC. Njihovim zahvatanjem preko istražnoeksploatacionihbunara ...
    geotermalna energija, hidrogeotermalni resursi, hidrogeotermalni sistemi, hidrogeotermalnapotencijalnost, energetska valorizacija, hidrogeološka rejonizacija, grad Beograd

  • Old or New, We Repair, Adjust and Alter (Texts)

    Cvetana Krstev, Ranka Stanković (2020)
    U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.
    ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja
    ... ‘reception’). For the problem of switching between two pronunciations two systems were developed: the first one transforms an Ekavian text to its Ijekavian version, the other transforms an Ijekavian text to its Ekavian version. These systems work in the similar way as the system for diacritic restoration, and ...
    ... vs. bjega ‘to runaway (aorist)’. Both systems use the same procedure for detecting words that should be “corrected” and producing lists of candidates for replacement, although, obviously, the resources they use are different. The results produced by two systems on two sample texts are presented in Table ...
    ... versatile texts. 6 Future Work In this paper we presented three operational systems for three text mending tasks for Serbian: correction of OCR errors, diacritic restoration and switching between two pronunciations. Although these systems were already successfully used for various tasks (for corrections of ...

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)
    ... Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović1 ABSTRACT Opportunities offered by geographic information systems are very modestly exploited in Serbian mining industry. It is the authors’ wish to bring closer to the mining public at least a small part of the ...
    ... possibilities for high quality situation monitoring and comprehension, as well as prediction of our future line of action. Geographic information systems (GIS) are precisely such a tool. They offer support for implementation of various types of projects aimed at economic development, resource management ...
    ... offering fast access to data necessary for decision making on a large number of issues. According to a general definition, geographic information systems are a powerful set of tools for collecting, storing, searching, transforming and presentation of real word spatial data [Burrough & McDonnel, 2006] ...

  • The Rift Sequence Stratigraphy of the Itebej Field (Pannonian Basin, Serbia)

    Saša Ivanišević, Jelena Radišić, Ivana Isić, Dejan Radivojević (2019)
    ... of the Itebej Field (Pannonian Basin, Serbia) | Saša Ivanišević, Jelena Radišić, Ivana Isić, Dejan Radivojević | AAPG Vienna, Paratethys petroleum systems between Central Europe and the Caspian Region, Vienna, 26-27 mart, 2019 | 2019 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005453 Дигитални репозиторијум ...

  • Strain partitioning along a curved strike-slip fault system during indentation: inferences from analogue modelling

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)

  • Effect of Properties of Working Fluids on the Efficiency of a Low-Temperature Organic Rankine Cycle

    Marija Živković, Aleksandar Mijatović, Dejan Ivezić, Boban Pavlović (2024)
    Decarbonization of all segments of energy systems, both on the supply and demand side, is one of the main goals of the energy transition. Electricity supply in the future will largely rely on generation from intermittent energy sources: wind and solar. Locally available, non-utilized alternative low-temperature energy sources as hydro-geothermal wells, and abounded oil and gas wells, have the potential to provide continual energy production over the year. Electricity generation from these energy sources is carried out with working ...
    svojstva, radni fluidi, efikasnost, ORC, niska temperatura

  • The effect of finite driving rate on avalanche distributions

    Sonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević (2021)
    Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear Physics

  • 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)
    ... groundwater in geothermal areas or with low-temperature groundwater systems. Given that the sub- ject matter of this research was groundwater used for drink- ing water supply, the focus is on the theoretical basis of low-temperature systems. Conditions that favor arsenic migration are associated with a reducing ...
    ... structural porosities and clay interbeds that pre- vent pollutants from permeating from the ground surface. It should be noted, however, that water supply systems are comprised of relatively deep (70-250 m) drilled wells which tap Pliocene-Pleistocene sediments, while no elevat- ed arsenic concentrations were ...
    ... Faculty of Natural Sciences of the University of Novi Sad [22]. Total arsenic concentrations were measured in 470 water samples from public water supply systems from 2004 to 2009. Sampling and analyses of drinking water were per- formed at the following laboratories: at the Institute of Public Health of Vojvodina ...

  • Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia

    Bojan Kostić, Pavle Tančić, Natalija Batoćanin (2024)
    geohemija granata, retke zemlje, fluidne inkluzije, skarnovsko ležište Rudnik

  • An aproach to Implementation of blended learning in a university setting

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Jelena Prodanović (2011)
    ... Springer, 2006. [6] Bouzeghoub, A. Elbyed, A., Ontology Mapping for Web-Based Educational Systems Interoperability, IBIS – International Journal of Interoperability in Business Information Systems, No.1, pp.73-84, 2006. [7] Bianchi,S., Mastrodonato, C., Vercelli, G., and Vivanet, G., Use ...
    ... Preprocessor), with a SQL type data base (for example MySQL, PostgreSQL, Microsoft SQL Server or Oracle). It can be run on Windows and Mac operating systems and many flavors of Linux. A particularly favorable feature of Moodle is a rather large, very active and constantly growing community of developers ...
    ... system permitting access to registered users only is implemented. The Moodle platform offers support for several different authentication systems, such as:  Manual definition of accounts,  CAS (Central Authentication Store) server authentication,  External user databases,  FirstClass ...

  • An Efficient Class of Iterative Root-Finding Methods with Applications

    Dejan Ćebić, Nebojša Ralević (2021)

  • The State and Perspective of Belgrade District Heating System Development

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Fethi Silajdžić, Samra Arnaut, Goran Đelić (2019)
    District heating (DH) system in Belgrade provides energy for heating of more than 21 million m2 in households (app. 50% of all households), public, commercial and industry sectors. Public Utility Company “Beogradske elektrane” is responsible for all segments of the DH system operation. The system is fueled mostly by natural gas. The share of renewables is negligible. The research analyzes effects of implementation of two main projects proposed in the Development Strategy of the PUC - the introduction of ...
    daljinsko grejanje, Beograd, razvoj
    ... | Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Fethi Silajdžić, Samra Arnaut, Goran Đelić | 5th International Conference on Smart Energy Systems | 2019 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005047 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду омогућава приступ ...

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting

  • The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system

    Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)
    The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...
    микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми
    ... The efficiency of the surfactant mixture increases with increasing 6. In these quaternary systems the location of Ž is not determined because, in contradiction to many other microemulsion systems, equilibration for the system water/toluene/Lutensol ON 50 was parti- cularly slow near the ...
    ... of ternary nonionic surfactanUwater/oil microemulsions are very interesting scientifically and technically. A convenient way to study these systems is to measure the phase behavior at constant oil/water ratios as a function of temperature, 7, and surfactant . mass fraction, ». Correspondence: ...
    ... actants contain / carbon atoms in the hydrophobic alkyl chain and / ethoxy units in the hydrophilic head- group. The phase behavior of microemulsion systems containing alkyl polyglucoside has been studied by some authors [21-23]. In the last decades, a lot of papers were pub- lished concerning many ...

  • Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)

    Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from raw immature oil shale samples from the Lower Miocene Aleksinac Basin (Serbia) and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is determined. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently ...
    ... biomarkers in initial bitumen isolated from raw immature oil shale samples and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is ...
    ... Gajica et al., 2017). Pyrolytic experiments were performed in open (OS, Pyrolyser, Model MTF 10/15/130 Carbolite, UK) and closed (CS, autoclave) systems at a temperature of 400 °C for 4 h. The biomarker signatures were evaluated using gas chromatography-mass spectrometry and carbon specific isotope ...

  • 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
    ... processing: Applications and trends. Expert [8] Bazzazi, A. A., Osanloo, M., & Karimi, B. (2011). Deriving preference order of open pit mines equipment through MADM methods: Application of modified VIKOR method. Expert Systems with Applications, 38(3), 2550-2556;Systems with Applications, 121, 393-417; [9] ...
    ... Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje Exploatation effects of coal systems on the open pit mine Tamnava–West field Marko Lazić[footnoteRef:1], Filip Miletić[footnoteRef:2], Milena Lekić2, Veljko Rupar2, Željko Petrović[footnoteRef:3] ...
    ... nisu međusobno uporedivi, u radu su korišćene metode višekriterijumskog odlučivanja. Abstract: This paper analyzed the exploitation effects of coal systems at the open–pit mine Tamnava–West field for the first six months of the current year. The analysis was performed in the aspect of reached production ...

  • Fuzzy Model for Risk Assessment of Machinery Failures

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...
    fazi teorija, rizik, otkaz rudarskih mašina
    ... its present form and it is necessary to implement the data as expert opinions. A system with real-time online condition monitoring and data acquisition provides the possibility of timely (or real-time) risk level assessment. Such systems are expensive, and the price is proportional to the complexity ...
    ... necessary to use expert judgment that includes an opinion on the quality of the backup element activation system. If the six relation is used, the outcome will be the same in both cases, which does not work here. Thus, in order to obtain an adequate risk assessment, the incorporation of expert judgment into ...
    ... parameter β through linear interpolation. Symmetry 2020, 12, 525 8 of 26 3.2.2. Fuzzification of the Data Obtained Based On Expert Judgment Fuzzification of the data based on expert judgment was accomplished using the membership degree of the fuzzy sets. The membership degree differs from the membership ...

  • 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
    ... modules of calculation of SRP systems as a Prosper — RodStar - Includes methods for analyzing the dynamics of sucker rods and wave effects in pumping systems. 34 — QROD - Utilizes the wave equation for the analysis and optimization of sucker rod pumping systems, focusing on dynamic responses ...
    ... dynamic effects in pumping systems, including sucker rod pumps. 5.1 RodStar RODSTAR is a powerful, easy-to-use rod pumping system simulator and design tool. With RODSTAR you can design new rod pumping installations or make changes to existing rod pumping systems. It is a tool that you can use ...
    ... the performance of sucker rod pump systems and reduce operational costs. By comparing different programs in this study, we conclude that the RODSTAR program delivers the best and most optimal results, as it is specifically specialized for sucker rod pump systems and incorporates inclinometry into ...

  • Тhe Properties of Modifications of Newton’s Method For Solving Nonlinear Equations

    Ralević Nebojša, Ćebić Dejan (2013)