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Упит dcterms_subject_txt:fuzzy dynamic TOPSIS

213 items

  • Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine

    Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)
    Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...
    raspoloživost, fazi teorija, AHP višekriterijumska analiza, eksperska ocena, buldozer
    ... based on the theory of fuzzy sets, has been developed. Theories of fuzzy logic are specifically used for description and proposition of indicators, i.e., their composition in which prevail uncertainty, indefinitely, multiplicity, subjectivity and mutual over-lapping. Fuzzy logic is used as a mathematical ...
    ... y processed and translated into a fuzzy form. The second mode of the expert assessment is represented by the mutual ranking of partial indicators. In this paper, ranking is done using the AHP method. The Fuzzy-AHP synthesis model is represented through the fuzzy inference model where inputs are ...
    ... K.Y. System failure engineering and fuzzy methodology an introductory overview. Fuzzy Sets Syst. 1996, 83, 113–133. [CrossRef] 10. Miodragovic, R.; Tanasijevic, M.; Mileusnic, Z.; Jovancic, P. Effectiveness assessment of agricultural machinery based on fuzzy sets theory. Expert Syst. Appl. 2012, ...

  • Digital Library From A Domain Of Criminalistics As A Foundation For A Forensic Text Analysis

    Dalibor Vorkapić, Aleksandra Tomašević, Miljana Mladenović, Ranka Stanković, Nikola Vulović (2017)
    U ovom radu predstavljen je model koji omogućava prikupljanje, pripremu, opis metapodataka, upravljanje i eksploataciju, uključujući pretragu punog teksta dokumenata iz domena kriminalistike napisanih na srpskom jeziku. Predloženi pristup primenjuje se na veb portalu koji sakuplja različite tekstove nastale iz časopisa Akademije za kriminalistiku i policijske studije, Krivičnog zakona Srbije, konferencija „Tara“ i „Reiss“, kao i iz nekih doktorskih disertacija vezanih za ovu oblast istraživanje. Nakon obrade teksta, korpus koji sadrži preko 5500 stranica običnog teksta, kreiran je i ...
    Omeka, Wordnet, pretraga punog teksta, morfološka i semantička pretraga teksta, proširenje upita
    ... leksičke baze Dopuna terminoloških baza «extend» «extend» «extend» Figure 3. Linguistic resources applications DYNAMIC MODEL QUERY EXPANSIONS The dynamic aspect of the application is presented in the interaction diagram with a model of query expansion, showing messages sent between ...

  • 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

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)
    ... objective function, but at the infeasible points the penalty function value is equal to high value as shown in (12) (Ali, 2014). In this paper Dynamic Penalty Function is applied to transform (1) into an unconstrained optimisation problem through Joines and Houck's method (Joines and Houck, 1994): ...

  • 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
    ... equation for the analysis and optimization of sucker rod pumping systems, focusing on dynamic responses and system performance. — PROSPER - This software uses the wave equation to simulate and analyze dynamic effects in pumping systems, including sucker rod pumps. 5.1 RodStar RODSTAR is a powerful ...
    ... discharge valves—larger suction valve and smaller discharge valve—as well as higher volumetric efficiency in cases where pumping is performed when the dynamic pressure is lower than the saturation pressure (presence of gas at the pump intake) and the ability to achieve a high ratio of discharge to suction ...

  • Projecting short to medium-term effects of carbon emissions trading on Serbia's GDP

    Boban Pavlović, Nikola Trtica (2024)
    This paper presents an approach to assess the short to medium-term effects of the Emissions Trading System (ETS), an economic and climate policy instrument aimed at reducing greenhouse gas emissions, on GDP from the expenditure side. The analysis focuses on Serbia’s electricity sector, which relies heavily on lignite-based pro duction dominated by state-owned enterprises. The obtained projections suggest that in the short term, the introduction of an ETS may lead to slower GDP growth compared to official forecasts. However, ...
    ETS, BDP - rashodni pristup, cene električne energije
    ... economic growth. Regarding the amplitude of GDP declines and growth under various scenarios compared to official GDP projections in Serbia, the dynamic changes between the analyzed years arise from the fact that household consumption accounts for 70% of Serbia's total GDP structure (Statistical ...
    ... relatively constant according to official projections. This constraint can limit the depth of the analysis and may not capture the full complexity of dynamic interactions within the economy. For a more detailed understanding of the effects, this methodology would need to be coupled with additional analyses ...
    ... Landa Rivera, G., Reynčs, F., Cortes, LL, Bellocq, F.-X., Grazi, F., 2016. Towards a low carbon growth in Mexico: is a double dividend possible? A dynamic general equilibrium assessment. Energy Pol. 96, 314—327. https://doi.org/10.1016/j. enpol.2016.06.012. Leroutier, M., 2022. Carbon pricing and ...

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... elastic waves: cp = 6661.00 m/s ‚ velocity of transverse elastic waves: cs = 2852.67 m/s Energies 2016, 9, 617 11 of 15 ‚ dynamic elasticity modulus: Edin = 62.46 GPa ‚ dynamic Poisson’s ratio: µdin = 0.39 GPa 4.2.2. Method of Blasting in the Kovilovača Open Pit Measurements of seismic shocks at ...

  • Optimizacija dužine strele rotornih bagera u funkciji stabilnosti kosina i efektivnosti rada na površinskim kopovima lignita Srbije

    Branko M. Petrović (2016-07-12)
    Rotorni bageri su mašine koje se u današnje vreme najviše primenjuju uprocesu masovne eksploatacije uglja zahvaljujući, pre svega, nizu tehničkoeksploatacionihprednosti u odnosu na druge vrste bagera. Raznovrsnirudarsko-tehnički zahtevi otkopavanja doprineli su razvoju nekoliko tipova ovihmašina, tako da svaki od njih ima svoje prednosti i nedostatke u odnosu nadrugi tip.Predmet istraživanja u disertaciji odnosi se na izbor optimalnekonstrukcije strele bagera i njene usaglašenosti sa uslovima radne sredine kojiće vladati na površinskim kopovima lignita Srbije, imajući u vidu složene usloveeksploatacije (velika ...
    površinski kop, parametri bloka, kapacitet, rotorni bager, strelabagera, geomehanika, stabilnost kosina, ekonomija
    ... t modeling and modeling of operating machinery with the use of real data from the opencast mines of MB KOLUBARA and field measurements of the dynamic behavior of excavator during operation. Implementation of such designed methodology for optimization of BWE’s boom length in the function ...
    ... autora A. Brkić, T. Manevski, D. Ignjatović, P. Jovančić i V. Spasojević-Brkić, je u svom radu Diagnostics of bucket wheel excavator discharge boom dynamic perfomance and its reconstruction [8], istražila uzroke loših dinamičkih perfomansi rotornog bagera C-700 S koji radi na površinskom kopu u R.B ...
    ... 51.5 mm), dok su sva ubrzanja strukture svedena u granice dozvoljenog (do 2m/s²). Bošnjak S. , Zarić N. , Oguamanam D. su u svom radu On the dynamic modelling of bucket wheel excavators [5], razmatrali dinamičko ponašanje bagera izazvano otporom kopanja, koje zavisi od relativno velikog broja ...

  • 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
    ... ‘’Debris Flow: Mechanics, Prediction and Countermeasures’’. Annual Review of Fluid Mechanics 13 (1): 57-77. Zienkiewicz, O.C., Shiomi, T. (1984). ‘’Dynamic behavior of saturated porous media; The generalized Biot formulation and its numerical solution’’. Int. J. Numer. Anal. Methods Geomech. 8, 71–96 ...

  • Hronološki pregled razvoja površinske eksploatacije lignita u Srbiji

    Bojan Dimitrijević, Radmila Gaćina, Bogoljub Vučković (2023)
    U ovom preglednom radu dat je istorijski pregled razvoja površinske eksploatacije lignita na teritoriji Srbije, uz kratak osvrt na geološki nastanak i kvalitet i rezerve uglja, kao i mogućnosti korišćenja za dalju upotrebu. Kolubarski, Kostolački i Kovinski ugljeni baseni lignita u Srbiji, ne računajući Kosovsko-Metohijski i Drenički u sastavu AP Kosovo i Metohija po Rezoluciji 1244 UN, su ležišta najrasprostranjenijeg uglja - lignita u Srbiji koji se eksploatiše od druge polovine 20. veka na velikom broju površinskih kopova ...
    površinska eksploatacija ugalja, lignit, Kolubara, Kostolac, Srbija

  • 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)
    ... velocity of longitudinal elastic waves cp = 6,661.00 [m/s] - velocity of transverse elastic waves cs = 2,852.67 [m/s] - dynamic elasticity modulus Edin = 62.46 [GN/m2] - dynamic Poisson's ratio μdin = 0.39 [GN/m2] 4.2 Blasting Method Measurements of seismic shocks at the ”Kovilovača” open ...

  • The ‘Umka’ landslide

    Uroš Đurić, Dragana Đurić, Miloš Marjanović, Biljana Abolmasov, Ivana Vasiljević (2024)
    We present an in-depth landslide map of the ‘Umka’ landslide near Belgrade, Serbia, at a scale of 1:5000. The map delineates elements at risk, primarily buildings and road infrastructure impacted by the landslide displacements of several cm per year, introduced during frequent reactivation stages. The Main map results from a survey of over 350 buildings and more than 7 km of state and local roads. The acquisition techniques included engineering geological field mapping, building survey, and visual interpretation of ...
    rizik od klizišta, elementi rizika, kartiranje pomoću drona, ispitivanje objekata, geotehnički monitoring

  • GIS Application Improvement with Multilingual Lexical and Terminological Resources

    Ranka Stanković, Ivan Obradović, Olivera Kitanović (2010)
    ... to change or if maps http://www.rgf.bg.ac.rs/GeolISSTerm/ are created at different scales, and/or for different users. The user can specify dynamic labelling for all features in a layer, or use label classes to specify different labelling properties for features within the same layer. For example ...

  • Formative evaluation of e-learning projects with the logical framework approach

    Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković (2015)
    ... public investment in social programs was financed, but the impact of those investments remained largely unknown. E-learning is part of a new dynamic that characterizes educational systems in the 21st century, resulting from the merge of different disciplines, such as computer science, com ...

  • Serbian Society of Geomorphologists

    Dragana Đurić, Jelena Ćalić (2019)

  • Split-Desktop software for the analysis of fragment size distribution of blasted rock mass

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović (2023)
    Drobljenje stena je najvažniji pokazatelj u proceni efekata miniranja pri proizvodnom miniranju u površinskoj eksploataciji. Stepen drobljenja stena ima veliki uticaj na efikasnost daljih operacija utovara, transporta, drobljenja i mlevenja. Optimalno drobljenje stena pri proizvodnom miniranju utiče na smanjenje ukupnih troškova proizvodnje. Stoga je pouzdana procena veličine drobljenja odminirane stenske mase veoma važno pitanje, ne samo u operacijama miniranja, već i u rudarskoj proizvodnji. Za predviđanje distribucije veličine komada odminirane stenske mase postoje različiti empirijski modeli. KUZ-RAM model omogućava ...
    Split-Desktop softver, drobljenje stena, miniranje, analiza, digitalna obrada fotografija

  • Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...
    Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatori

  • An Underground Mine Ore Pass System Optimization via Fuzzy 0–1 Linear Programming with Novel Torricelli–Simpson Ranking Function

    Dževdet Halilović, Miloš Gligorić, Zoran Gligorić, Dragan Pamučar (2023)
    rudna sipka, optimizacija, fazi linearno programiranje, trouglasti graf, Toričelijeva tačka, funkcija rangiranja

  • A Tel Platform Blending Academic And Entrepreneurial Knowledge

    Ivan Obradović, Ranka Stanković, Jelena Prodanović, Olivera Kitanović (2013)
    ... learning management system comprises of Moodle and Adobe Connect for eLearning and Adobe Connect for webinars. Moodle (Modular Object-Oriented Dynamic Learning Environment), is a free software e-learning platform, originally developed by Martin Dougiamas, aimed at helping educators create online ...

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)
    ... CASE tools. In this paper we used Microsoft Visio because it has developed integration with ArcGIS through the "vsl" stencil. This is a specialized dynamic library, which can be loaded into Microsoft Visio and which enables its integration with ArcGIS. This library contains object models and a number ...