Претрага
197 items
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Multi-Criteria Fuzzy-Stochastic Diffusion Model of Groundwater Control System Selection
When considering data and parameters in hydrogeology, there are often questions of uncertainty, vagueness, and imprecision in terms of the quantity of spatial distribution. To overcome such problems, certain data may be subjectively expressed in the form of expert judgment, whereby a heuristic approach and the use of fuzzy logic are required. In this way, decision-making criteria relating to an optimal groundwater control system do not always have a numerical value. Groundwater control scenarios (alternatives) are identified through hydrodynamic ...expert judgment, linguistic variables, fuzzy dynamic TOPSIS, hydrogeology, groundwater control system, open-cast mine, geometric Brownian motionDušan Polomčić, Zoran Gligorić, Dragoljub Bajić, Miloš Gligorić, Milanka Negovanović. "Multi-Criteria Fuzzy-Stochastic Diffusion Model of Groundwater Control System Selection" in Symmetry, MDPI AG (2019). https://doi.org/10.3390/sym11050705
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Model of Strategic Decision Making in Mining Industry Based on Fuzzy Dynamic TOPSIS Method
Gligorić Miloš, Gligorić Zoran (2015)Gligorić Miloš, Gligorić Zoran. "Model of Strategic Decision Making in Mining Industry Based on Fuzzy Dynamic TOPSIS Method" in Journal of Multidisciplinary Engineering Science and Technology 2 no. 3, Berlin : (2015): 470-475
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Risk Evaluation: Brief Review and Innovation Model Based on Fuzzy Logic and MCDM
Stevan Djenadic, Milos Tanasijevic, Predrag Jovancic, Dragan Ignjatovic, Dejan Petrovic, Ugljesa Bugaric (2022)The risk assessment of engineering systems represents an important part of the quality of service and dependability. The existing methods for risk evaluation use crisp sets for rating partial indicators’ proposition and their cumulative products as an overall indicator. In this paper, existing FMEA and FMECA methods have been improved using the fuzzy expert system for calculating the risk priority number. The application of fuzzy logic allows the use of linguistic descriptions for risk analysis. In this way, the ...Stevan Djenadic, Milos Tanasijevic, Predrag Jovancic, Dragan Ignjatovic, Dejan Petrovic, Ugljesa Bugaric. "Risk Evaluation: Brief Review and Innovation Model Based on Fuzzy Logic and MCDM" in Mathematics, MDPI AG (2022). https://doi.org/10.3390/math10050811
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Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria
The choice of adequate mining machines is one of the most complex problems in the underground exploitation of mineral raw materials. The weight of such a decision is reflected in the high prices of these machines and the occurrence of even greater costs during their use if their choice was wrongly conceived. There are numerous examples from practice in which such decisions were made solely on the basis of comparing the prices of machines, without considering any of the ...utovarno-transportna mehanizacija, izbor, TOPSIS, entropija, standardna devijacija, težina kriterijumaVladimir Krivošić, Luka Crnogorac, Rade Tokalić. "Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria" in Underground mining engineering, University of Belgrade - Faculty of Mining and Geology (2024)
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Determination the advantage of solution in Eastern Serbia using the FTOPSIS method and comparison with the TOPSIS method
Sandra Milutinović, Milena Kostović, Ivana Jovanović, Miomir Mikić, Daniel Kržanović. "Determination the advantage of solution in Eastern Serbia using the FTOPSIS method and comparison with the TOPSIS method" in 53 rd International October Conference on Mining and Metallurgy, 3-5 October 2022, Bor, Serbia, Mining and Metallurgy Institute Bor (2022)
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Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje
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.... [9] Tsaur R–C.,,Decision risk analysis for an interval TOPSIS method” Applied Mathematics and Computation 218(8), pp. 4295–4304, 2011. doi:10.1016/j.amc.2011.10.001; [10] Krohling, R.A., & Pacheco, A.G.C. (2015). A-TOPSIS - An Approach Based on TOPSIS for Ranking Evolutionary Algorithms. Procedia Computer ...
... odlučivanja postoji više različitih metoda: · PROMETHEE metoda, · VIKOR metoda, · TOPSIS metoda, · ELECTRE metoda i · AHP metoda. Za analizu eksploatacionih učinaka ugljenih sistema korišćene su dve metode, VIKOR i TOPSIS metoda. 3.1 VIKOR metoda Metodu VIKOR razvio je Serafim Opricović, za potrebe rešavanja ...
... (4) gde je: (5) Rangiranje se izvodi sortiranjem alternativa prema merama Rj, Sj i Qj. 3.2 TOPSIS metoda Metoda TOPSIS je zasnovana na konceptu da izabrana alternativa treba da ima najkraće rastojanje od idealnog rešenja, kao i najduže rastojanje od anti–idealnog ...Marko Lazić, Filip Miletić, Milena Lekić, Veljko Rupar, Željko Petrović, Lazar Žujović . "Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje" in 10th International Conference Coal 2021, Jugoslovenski komitet za površinsku eksploataciju, Zlatibor (2021)
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Indeksi kontrole održavanja i korišćenja rotornog bagera
Razvoj površinske eksploatacije se u velikom stepenu zasniva na svestranoj mehanizaciji rudarskih radova. Kako bi se zadovoljili potrebni kapaciteti, neophodna je primena savremene mehanizacije, velikih kapaciteta i pouzdanosti u radu. Naime, sa stepenom povećanja mehanizovanosti radova smanjuje se broj zaposlenih radnika, povećava produktivnost rada, smanjuju troškovi po jedinici proizvoda, a samim tim i povećava ekonomičnost površinske eksploatacije. Predmet istraživanja su rotorni bageri SRs 1200 koji predstavljaju samohodne mašine kontinuiranog dejstva namenjene za otkopavanje jalovine i korisne supstance na površinskim ...Jovana Mitrović, Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić. "Indeksi kontrole održavanja i korišćenja rotornog bagera" in XI Međunarodna konferencija "Ugalj i kritični minerali 2023", CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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A decision support system for mine project selection under uncertainty using fuzzy topsis technique
Gligorić Zoran, Beljić Čedomir, Gluščević Branko, Jovanović Saša. "A decision support system for mine project selection under uncertainty using fuzzy topsis technique" in Proceedings of the 23rd International Mining Congress of Turkey, Antalya,Turkey:Chamber of Mining Engineers of Turkey (2013): 1471-1482
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Model of selection of longwall roadway drivage technology using fuzzy topsis method
Gligorić Zoran, Tokalić Rade, Beljić Čedomir, Jovanović Saša. "Model of selection of longwall roadway drivage technology using fuzzy topsis method" in Zbornik radova, V međunarodna konferencija – Ugalj 2011 – Zlatibor, 19-22. oktobar 2011., Beograd, Srbija:Jugoslovenski komitet za površinsku eksploataciju (2011): 53-65
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Multi - Attribute Technological Modeling of Coal Deposits Based on the Fuzzy TOPSIS and C - mean Clustering Algorithms
Gligorić Miloš, Gligorić Zoran, Beljić Čedomir, Torbica Slavko, Štrbac-Savić Svetlana, Nedeljković Jasmina (2016)Gligorić Miloš, Gligorić Zoran, Beljić Čedomir, Torbica Slavko, Štrbac-Savić Svetlana, Nedeljković Jasmina. "Multi - Attribute Technological Modeling of Coal Deposits Based on the Fuzzy TOPSIS and C - mean Clustering Algorithms" in Energies 9 no. 12, Basel:MDPI AG, Basel, Switzerland (2016). https://doi.org/10.3390/en9121059
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Utvrđivanje eksplotacionih učinaka sistema na otkrivci na površinskom kopu Tamnava-Zapadno polje primenom Fuzzy Topsis metode
Planiranoj proizvodnji uglja na površinskim kopovima prethodi nesmetano i kontinuirano otkopavanje otkrivke. Kako bi se obezbedila potrebna količina uglja, sistemi na otkrivci moraju uvek biti korak ispred u dinamici razvoja kopa. Velika produktivnost, visoki kapaciteti i dobar koeficijent vremenskog iskorišćenja, treba da budu odlika rada sistema putem kojih se vrši otkopavanje otkrivke. Kroz ovaj rad izvršena je analiza eksploatacionih učinaka za posmatrani period po smenama, kako bi se utvrdilo koja je od pomenutih smena ostvarila najbolje rezultate.Marko Lazić, Filip Miletić, Lazar Žujović. "Utvrđivanje eksplotacionih učinaka sistema na otkrivci na površinskom kopu Tamnava-Zapadno polje primenom Fuzzy Topsis metode" in XV međunarodna konferencija Ugalj 2022, Jugoslovenski komitet za površinsku eksploataciju (2022)
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Effectiveness Analysis of Different Bucket-wheel Excavators
Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić. "Effectiveness Analysis of Different Bucket-wheel Excavators" in 8th International Conference Mining and Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
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Development of the hybrid MCDM model for evaluating and selecting bucket wheel excavators for the modernization process
This paper presents a methodology for evaluating and ranking different bucket wheel excavators (BWE) for determining which machine should enter in the process of revitalization and modernization. Various multicriteria methods are used. Combining them achieves the best effect when choosing BVE for the modernization process. AHP, TOPSIS, VIKOR, and PROMETHEE methods are used. The hybrid models are developed from the multi-criteria decision making (MCDM) methods and they are used to evaluate the basic indicators that characterize the operation of ...Snezana Savkovic, Predrag Jovancic, Stevan Djenadic, Milos Tanasijevic, Filip Miletic. "Development of the hybrid MCDM model for evaluating and selecting bucket wheel excavators for the modernization process" in Expert Systems with Applications, Elsevier BV (2022). https://doi.org/10.1016/j.eswa.2022.117199
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Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja
Hidraulični bageri primenjuju se u različitim oblastima privrede a najzastupljeniji su u građevinarstvu i rudarstvu. Na površinskim kopovima sa kontinualnim sistemima, klasifikuju kao pomoćna mehanizacija a na površinskim kopovima sa diskontinualnim sistemima, kao osnovna mehanizacija. Kako je u oba slučaja njihova primena neizostavna, važno je izvršiti adekvatnu analizu postojećih podataka, u cilju optimizacije izbora tipa hidrauličnog bagera u odnosu na uslove rada datog površinskog kopa. U radu su opisane različite višekriterijumske metode koje su korišćene za analizu hidrauličnih bagera. ...... Vehicles, Energy, 34, pp. 112-125, 2009. DOI: 10.1016/j.energy.2008.09.004 [10] Ashrafzadeh M, Rafiei F M, Isfahani M-N, Zare Z, Application of fuzzy TOPSIS method for the sele- ction of Warehouse Location: A Case Study. Interdi- sciplinary, Journal Of Contemporary Research In Business, 3, pp. 655-671 ...
... alter- nativa Ai (od najbolje do najlošije). Rangiranje alternativa u izboru (hidrauličnih bage- ra) prema metodi TOPSIS data je u tabeli 9. Tabela 9. Rezultati primene TOPSIS metode TOPSIS Alternativa proizvođač tip izračunati koeficijent rang 14 Oktobar BGH 1000G 0,28462 3 Caterpillar ...
... 1000G 1,0000 1,0000 1,0000 3 Caterpillar 323 DLH 0,5997 0,5197 0,4396 2 New Holland E215 B 0,0000 0,0000 0,0000 1 4.4 TOPSIS metoda Metoda TOPSIS je zasnovana na konceptu da izabrana alternativa treba da ima najkraće rastojanje od idealnog rešenja i najduže od anti-idealnog rešenja ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković. "Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2019). https://doi.org/10.5937/tehnika1903369D
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The preliminary selection of oil reservoir in Serbia for carbon dioxide injection and storage by a multicriteria decision-making approach: a case study
Lola Tomić, Vesna Karović Maričić, Dušan Danilović. "The preliminary selection of oil reservoir in Serbia for carbon dioxide injection and storage by a multicriteria decision-making approach: a case study" in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, Taylor & Francis (2021). https://doi.org/10.1080/15567036.2021.1936303
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Conversion of land areas after coal mine closure and reclamation
Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.... reclamation model on which all further planning activities depend, can be used various multi-criteria decision-making methods such as Promethee, AHP, TOPSIS. Decision support models consider several criteria to determine the optimum solution, also used to support decision makers in solving complex problems ...
... comprehensibility, as rank reversal, when alternatives should have the shortest i ; NE ability to measure the relative order of preference changes when TOPSIS geometric distance from . NINA NR performance for each alternative | an alternative is added to or the positive ideal : : . :. : in a simple ...
... https://doi.org/10.1016/J.jenvman.2021.114352 Yu, Xueyi, Chi Mu, and Dongdong Zhang. "Assessment of land reclamation benefits in mining areas using fuzzy comprehensive evaluation." Sustainability 12.5 (2020): 2015. https://doi.org/10.3390/su12052015 Jackson, S.T., Hobbs, R.J. Ecological restoration ...Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić. "Conversion of land areas after coal mine closure and reclamation" in 9th International conference mining and environmental protection MEP 23 Proceedings, Sokobanja, 24-27.05.2023., Belgrade : University of Belgrade - Faculty of mining and geology (2023)
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Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova
Zoran M. Štirbanović (2015-07-01)Rudarstvo, a u okviru njega i priprema mineralnih sirovina, se odlikuje složenošću tehnoloških procesa što je posledica velikog broja uticajnih parametara. Samim tim je potrebno biti veoma obazriv prilikom donošenja odluka u oblasti rudarstva. U cilju što efikasnijeg funkcionisanja procesa, moguće je primeniti različite metode koje služe za pojednostavljenje procesa odlučivanja. Jedna od takvih metoda jeste i teorija grubih skupova. Ona predstavlja relativno novu matematičku teoriju koja je pogodna za razumevanje nepreciznih i nepotpunih podataka kao i za otkrivanje ...rudarstvo, priprema mineralnih sirovina, teorija grubih skupova, višekriterijumsko odlučivanje, flotacijsko jalovište, flotacijski kolektor, flotaciona mašina... Zanimljivo je uporediti definicije klasičnih skupova, rasplinutih (fuzzy) skupova i grubih skupova. Klasični skup je primitivni pojam i definiše se intuitivno ili aksiomatski. Rasplinuti (fuzzy) skupovi se definišu korišćenjem funkcije fuzzy pripadnosti, koja uključuje napredne matematičke strukture ...
... rasplinute (fuzzy) pripadnosti. Svojstva 5 i 6 pokazuju da se pripadnost za uniju i presek skupova, generalno ne može izračunati iz pripadnosti njihovih članova, kao što je slučaj kod rasplinutih (fuzzy) skupova. Prema tome gruba pripadnost je formalno generalizacija rasplinute (fuzzy) pripadnosti ...
... metode utiliteta, jer se predlažu konkretne (šest) forme funkcije (funkcije preferencije) preko kojih se definiše i utilitet. 2.6. Metoda TOPSIS Metoda TOPSIS (engl. Technique for Order Preference by Similarity to Ideal Solution), zasnovana je na konceptu da izabrana alternativa treba da ima najkraće ...Zoran M. Štirbanović. "Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-07-01)
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Dynamic and Static Elastic Properties - Laboratory Investigations of Metamorphites of the "Vranjska Banja" Series
Metamorphites of the series “Vranjska banja” built predominantly of high crystallinity schist series, alternately layered double mica, gneiss, leptonite and micaschist. For the construction of the “Prvonek” dam were carried out laboratory investigations of dynamic and static elastic properties on micashist and gneiss samples in the perpendicular and parallel direction to the foliation. These investigations provided monitoring of the rock mass anisotropy properties and greater reliability of the design parameteres. As the design of mining and construction facilities becomes ...Jelena Majstorović, Bojan Dimitrijević, Suzana Lutovac, Snežana Savković, Miloš Gligorić. "Dynamic and Static Elastic Properties - Laboratory Investigations of Metamorphites of the "Vranjska Banja" Series" in XVI International Conference of the Open and Underwater Mining of Minerals, Scientific and technical union of mining, geology and metallurgy (2021)
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Correlation of uniaxial compressive strength with the dynamic elastic modulus, p –wave velocity and s –wave velocity of different rock types
Knowing mechanical properties of rocks incorporated with ultrasonic waves velocities investigations provide a secure basis for mine modelling. Uniaxial compressive strength, dynamic elastic modulus and ultrasonic waves velocities are just some of the rock properties that indicate on presence of discontinuities, stratification and fissures of rocks. Determining the relationship of these rock properties testing the rock samples that are corresponding to different rock types extracted from different mineral deposits represents the core of this study. In this paper, we ...Jelena Majstorović, Miloš Gligorić, Suzana Lutovac, Milanka Negovanović, Luka Crnogorac. "Correlation of uniaxial compressive strength with the dynamic elastic modulus, p –wave velocity and s –wave velocity of different rock types" in Underground mining engineering, Рударско - геолошки факултет - Београд (2019)
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Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers
This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd... Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Correlation Between Dynamic CBR and Compaction ...
... results of California Bearing Ratio (CBR) research on stat- ic (classic) and dynamic methods with ash samples in the unsaturated state has been presented [5], and the correlations of the parameters of the laboratory dynamic California Bearing Ratio (CBR, ) with the com- paction properties of sandy ...
... deformation (stiffness), that is, the level of compaction of the material, in situ and obtains the dynamic modulus of deformation (E„) [13, 14|. In Serbia, these devices are not widespread because the dynamic modulus is not considered in the quality assessment and quality control of pavement layers. The ...Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović. "Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers" in Soil Mechanics and Foundation Engineering, Springer Science and Business Media LLC (2024). https://doi.org/10.1007/s11204-024-09939-x