Претрага
329 items
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The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector
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 ...... the quantitative assessment of energy security is the subject of the last step procedure in which the center of gravity is found as a number in the range from 0 to 10. This number speaks of the energy security itself, such that the increase in the center of gravity value represents a higher level of ES ...
... Energy Security Assessment Quantification The energy security assessment is quantified through the center of gravity of the surface as a number in the range 0 to 10 (expression 22) as a part of defuzzification procedure. The evaluation of energy security by synthesis indicators in the form of a dominant ...Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković. "The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12060908
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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 ...... affected by reliability, maintenance, and level of support. The descriptive form contains linguistic descriptions and affiliation (grade extent in a range of 0%–100%). Unlike the conventional model, the final grade can be divided into several outcomes. The synthesis was made using the fuzzy theory and ...Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović. "Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine" in Energies, MDPI AG (2019). https://doi.org/10.3390/en12214044
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A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia
When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, environmental, and socio-political criteria. For the evaluation of criteria and alternatives, the Fuzzy Analytical Hierarchy Process (FAHP) method is applied. The obtained weights are formed according to the values of energy indicators and expert judgments. The use of a fuzzy numerical value scale for the assessment of expert judgments and energy indicators provides a more sensitive ...... Electricity Producer Status in Serbia (new, 2013): • Hydropower plants — This includes both run-of-the-river and reservoir hydropower plants, over a wide range of ca- pacities. The most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. Some hydroelectric power plants ...Boban Pavlović, Dejan Ivezić, Marija Živković. "A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia" in Energy Reports, Elsevier BV (2021). https://doi.org/10.1016/j.egyr.2021.02.072
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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, dependabilityNikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović. "A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach" in Applied Sciences, Basel, August 2024, MDPI (2024). https://doi.org/https://doi.org/10.3390/app14177947
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Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints
Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski. "Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints" in Journal of Geodynamics, Elsevier BV (2024). https://doi.org/10.1016/j.jog.2024.102058
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Управљање радом центрифугалних компресора
Младен Благојевић (2024)Овај мастер рад се бави анализом и управљањем рада центрифугалних компресора у индустријским постројењима, са посебним освртом на управљачке системе који осигуравају њихов ефикасан рад. Рад обухвата разматрање различитих система за регулацију протока, притиска и примену савремених метода регулације као што су повратна и напредна. Такође, анализиране су динамичке промене у раду компресора, утицај поремећајних величина и могућности оптимизације. Резултати су показали да правилна примена управљачких система не само да спречава пумпање, већ и повећава стабилност и продуктивност целокупног ...центрифугални компресори, управљање компресорима, проток притисак, повратна регулација, напредна регулација, оптимизација... aeed-hadi 33 pacnonarab»y norojmaH aJtar. CrnHka 18. npakayyje rpaMep paana IGV-oBa tnoji pa3jtHuHTHM yTJIOBHM4a. Design point Throttle range Capacity cnuka 18. KpaBe Kapakrepucruke IGV? 4.2.3. Ocrajte MerojJte yripaBjbamba IIlocroje H pyre MeTOHeČ KOHTPpOMC KOJE CC KODpMHCTE y CH ...Младен Благојевић. Управљање радом центрифугалних компресора, 2024
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Multiple-Criteria Decision-Making in Mine Development Planning
Sanja Bajić (2023)The Borska Reka ore deposit is an experimental location where developed methodologies have been applied. It is the largest ore body within the Bor mining complex, which has been the subject of numerous studies and analyses for more than three decades. The paper focuses on the application of FAHP and the VIKOR method to address ranking of alternatives and select the optimal mining method by means of fuzzy multicriteria optimization.Sanja Bajić. "Multiple-Criteria Decision-Making in Mine Development Planning" in Proceedings of the 5th International Underground Excavations Symposium, 5-6-7 June 2023, Istanbul, Topkapi : Dinç Ofset Mat. Rek. San. ve Tic. Ltd. Şti. (2023)
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Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)
Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...... is available at: www.dr.rgf.bg.ac.rs 2019 | 72/2 | 109–128 | 21 Figs. | www.geologia-croatica.hr Journal of the Croatian Geological Survey and the Croatian Geological Society 1. INTRODUCTION Since the early pioneering work of e.g. ROYDEN et al. (1983) and HORVÁTH (1984), the following thirty ...
... The generalized geological cross-section through the Beli Potok trough (modified and upgraded after STEVANOVIĆ, 1951). Numbers indicate the studi- ed outcrops that are located near the profile line. For the faults key, see Fig. 1. Note: Scale is adapted to better illustrate the geological relationships ...
... foraminifers. Rare detritus comprises mainly quartz clasts together with carbonates, quartzites, schists, and cherts. Clasts are well rounded and range from 0.4–1 cm in size. Frequent bivalve remnants (Glycymeris pilosus (LINNÉ), Flabel- lipecten besseri (ANDRZEJOWSKI) and Ostrea sp. are present. ...Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić. "Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)" in Geologia Croatica (2019). https://doi.org/10.4154/gc.2019.11
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Tehnologija izrade i opremanje magacina eksploziva za potrebe ležišta bakra
Aleksandar Milojević (2024)Nakon radova otvaranja i početka eksploatacije, rudno telo bakra velikih rezervi zahteva i veliku količinu eksploziva da bi se ostvario zacrtan kapacitet. Samim tim, neophodno je izraditi funkcionalan magacin eksploziva koji će biti pristupačan svim horizontima i koji će moći da ispuni celokupni kapacitet svih horizonata. Obzirom da će se u magacinu skladištiti eksploziv, on mora ispunjavati specijalne uslove kako bi skladištenje bilo bezbedno. Neophodno je isprojektovati magacin tako da ispuni sve zahteve po pitanju količine i načina skladištenja eksploziva, ...... strength = 9.938 MPa– _—ccC= 42 global strength = 23.859 MPa s |D.O0205 40 'deformation modulus = 18951.58 MPa a |0.502. 381 Failure Enivelope Range: _ 3 Application: Tunneh - Š 34 siglmax|6.0705 —]MPa š 32 UnitWeight|0.023 | MN/m3 5 30 TunnelDepih|540 m Fa Moht-Coulomb Fit 5 2 – |2768 MPa ...Aleksandar Milojević. Tehnologija izrade i opremanje magacina eksploziva za potrebe ležišta bakra, 2024
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Application of geophysical and multispectral imagery data for predictive mapping of a complex geo-tectonic unit: a case study of the East Vardar Ophiolite Zone, North-Macedonia
... Basic Geological Map of SFRJ 1:100,000. Federal Geological Survey (in Macedonian with English abstract). Belgrade, p 70 Rakikevik T, Penđerovski J, Kovačevik M (1973) Geological map and guide book for sheet Strumica (K 34—94), Basic Geological Map of SFRJ 1:100000. Federal Geological Survey ...
... D (1963) Geological map and guide book for sheet Kožuf (K 34—105), Basic Geological Map of SFRJ 1:100,000. Federal Geological Survey (in Macedonian with English abstract). Belgrade, p 47 Petrović D (2015) Spatial position of the East Vardar ophiolite: geo- physical-geological model and im ...
... Stojanov R, Arsovski M (I965) Geological map and guide book for Sheet Prilep (K 34-92), Basic Geological Map of SFRJ 1:100,000. Federal Geological Survey (in Macedonian with Eng- lish abstract). Belgrade, p 65 Rakikevik T, Dumurdžanov N, Petkovski P (1969) Geological map and guide book for Sheet ...Filip Arnaut, Dragana Đurić, Uroš Đurić, Mileva Samardžić-Petrović, Igor Peshevski. "Application of geophysical and multispectral imagery data for predictive mapping of a complex geo-tectonic unit: a case study of the East Vardar Ophiolite Zone, North-Macedonia" in Earth Science Informatics, Springer Science and Business Media LLC (2024). https://doi.org/10.1007/s12145-024-01243-4
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Two approaches to compilation of bilingual multi-word terminology lists from lexical resources
In this paper, we present two approaches and the implemented system for bilingual terminology extraction that rely on an aligned bilingual domain corpus, a terminology extractor for a target language, and a tool for chunk alignment. The two approaches differ in the way terminology for the source language is obtained: the first relies on an existing domain terminology lexicon, while the second one uses a term extraction tool. For both approaches, four experiments were performed with two parameters being ...Branislava Šandrih, Cvetana Krstev, Ranka Stanković. "Two approaches to compilation of bilingual multi-word terminology lists from lexical resources" in Natural Language Engineering, Cambridge University Press (CUP) (2020). https://doi.org/10.1017/S1351324919000615
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Tektonske i litostratigrafske karakteristike šireg područja Grivske (Zapadna Srbija)
Nikola Otašević (2024)U ovom radu predstavljene su osnovne geološke karakteristike šireg područja Grivske. U litostratigrafskom pogledu na ovom prostoru prisutne su paleozojske, mezozojske i kenozojske sedimentne, magmatske i metamorfne stene. Tvorevine karbona su predstavljene semimeta-morfisanim tvorevinama.Tvorevine trijaske starosti su predstavljene slojevitim i masivnim krečnjacima, dok su tvorevine jure predstavljeni produktima ofiolitskog melanža. Takođe, prisutne su i tvorevine senona koje su predstavljene masivnim krečnjacima. U neogenoj sukcesiji dominiraju klastiti miocena, dok su u kvartaru zastupljeni različiti tipovi fluvijalnih, deluvijalnih i deluvijalno-proluvijalnih tvorevina. ...Nikola Otašević. Tektonske i litostratigrafske karakteristike šireg područja Grivske (Zapadna Srbija), 2024
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Fuzzy Model for Risk Assessment of Machinery Failures
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 ...... [6]. The application of fuzzy set theory and fuzzy logic to system failures in engineering has been analyzed by Cai [7]. The author offered a wide range of possibilities for applying fuzzy methodologies, among which the most prominent were the possibilities of applying fuzzy set theory and fuzzy logic ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy Model for Risk Assessment of Machinery Failures" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12040525
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Моделирање утицаја одступања линије најмањех отпора од пројектоване на интензитет потреса од минирања
Стефан Милановић (2024)Према дефиницији линија најмањег отпора представља најкраће растојање од центра минског пуњења до слободне површине. Oвим истраживањем представљен је утицај линије најмањег отпора, као и њеног одступања од пројектоване на интезитет потреса услед минирања. Проблем линије најмањег отпора је веома заступљен у пракси, где се занемарује изглед слободне површине, који може бити врло неправилан. Линију најмањег отпора је потребно мерити целом дужином минске бушотине према слободној површини, иако је у пракси случај да се мери најчешће као растојање од ...линија најмањег отпора, 3D модел, потреси услед минирања, минирање, слободна површина, метода раздвојених елеменатаСтефан Милановић. Моделирање утицаја одступања линије најмањех отпора од пројектоване на интензитет потреса од минирања, Београд : [С. Милановић], 2024
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Еоценска фауна југозападног дела Сирт басена (Либија)
Љупко Рундић, Мери Ганић (2020)Љупко Рундић, Мери Ганић. "Еоценска фауна југозападног дела Сирт басена (Либија)" in Записници Српског геолошког друштва, Српско геолошко друштво (2020)
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Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike
... elektronske komunikacije. Abstract: The radio frequency spectrum relates to the electromagnetic waves in the frequency range from 9 kHz to 3000 GHz and since this is a finite range of radio frequencies, the radio frequency spectrum is a limited natural resource of public importance and one of the key ...
... Many experts are making efforts to implement resource efficiency. From the point of view of IT resource management, it is necessary to expand the range of activities for resource efficiency of the environment. Serbia's event should be based on the knowledge that derives its aspirations and priorities ...
... depends on the choice of precursors, methanol is obtained. Subsequent multiple transformations, through a large number of derivatives, yield a wide range of petrochemicals, specialty chemicals, polymers and alternative synthetic motor fuels from methanol. It is extensively used for: mixing with conventional ...Мирослав Црногорац, Душан Даниловић, Лола Томић. "Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike" in IX Naučno stručni skup Preduzetništvo, inženjerstvo i menadžment Zrenjanin, 24.10.2020. god., Visoka tehnička škola strukovnih studija u Zrenjaninu (2020)
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Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides
Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)... al Tectonics, Special Publications 135. Geological Society, London, pp. 1–14. Dimitrijevic, M.D. (Ed.), 1994. Geological Atlas of Serbia 1:2.000.000. Seismotectonic and Seismological Map. Republical Foundation for Geological Investigations and Geological Institute GEMINI, Belgrade, 1994. Dooley ...
... patterns. In: Sussman, A.J., Weil, A.B. (Eds.), Orogenic Curvature: Integrating Paleomagnetic and Structural Analyses: Geological Society of America Special Paper 383. Geological Society of America, Boulder, CO, pp. 161–172. González, D., Pinto, L., Peña, M., Arriagada, C., 2012. 3D deformation ...
... southern Carpathians and the eastern Balkanides. In: Proceedings of XVII Congress of Carpathian–Balkan Geological Association, vol. 53. Special Issue. Kräutner, H.G., Krstić, B., 2003. Geological Map of the Carpatho–Balkanides between Mehadia, Oraviţa, Nǐs and Sofia. Geoinstitute, Belgrade. Krézsek ...Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović. "Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides" in Journal of Structural Geology, Elsevier BV (2021). https://doi.org/10.1016/j.jsg.2021.104386
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Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)
... Fig.2 Tectonic map of the study area with the sampling locations and results of “ Ar/Ar thermochronology (after basic geological maps of SFR Yugoslavia 1:1,000,000 and geological maps of Bul- garia 1:100,000 and 1:50,000). Labels in a regular type represent top- onyms, whereas labels in an ifalic ...
... rocks - |00 Crnook-Osogovo-Lisets complex — Fig.3 Tectonic map of the study area with structural elements (after basic geological maps of SFR Yugoslavia 1:1,000,000 and geological maps of Bulgaria 1:100,000 and 1:50,000). Labels in regular fype represent toponyms, whereas labels in iftalic type represent ...
... Reports Serbian Geological Society, Belgrade, pp 59-67 Dimitrijević MD (1972) Variscijski metamorfizam u aksijalnom delu Balkanskog poluostrva (mogućnosti nove genetske interpre- tacije). Zapisnici SGD za 1971. godinu:115—124 Dimitrijević MD (1997) Geology of Yugoslavia. Geological Institute ...Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Richard Spikings, Andreas Wetzel. "Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)" in International Journal of Earth Sciences, Springer Science and Business Media LLC (2016). https://doi.org/10.1007/s00531-016-1380-6
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Arsenopirit iz rudnih ležišta Šumadijsko-kopaoničke oblasti: paregeneza, sastav i produkti oksidacije
Ivana N. Jelić (2023)Arsenopirit, FeAsS je čest pratilac polimetaličnih orudnjenja Šumadijsko-kopaoničke oblasti. Jedan je od sulfida koji u najvećoj meri koncentriše zlato. Nepoželjan je u rudama jer njegovom oksidacijom na jalovištima može doći do oslobađanja arsena koji spada u elemente toksične za životnu sredinu. U okviru ovog doktorata sistematski su ispitivani arsenopiriti iz različitih stadijuma i tipova orudnjenja rudnih ležišta i mineralizacija Šumadijsko-kopaoničke oblasti (Rudnik, Sastavci, Trepča, Gokčanica – Drenjak i Rujak, Golijska reka i Jurija). Uzorci arsenopirita ispitivani su polarizacionom mikroskopijom ...... Trifunović, S. (1973a): Geological map and explanatory notes of the Basic Geological Map of SFRJ, sheet Vrnjci (1:100 000), Savezni Geoloski Zavod, Beograd, 69. Urosević, M, Pavlović, Z., Klisić, M. et al. (1973b): Geological Map and Explanatory Notes of the Basic Geological Map of SFRJ, sheet Novi ...
... reflected light, SEM-EDS, XRPD 3methods. All investigated arsenopyrites are monoclinic and crystallize in space group P2;/c. Arsenic contents in the range of 32.2 to 34.3 at. % As were obtained based on determined unit cell parameters and values of di. It was established that there are numerous limiting ...
... gold. Mineralogical Magazine 56, 545–560. Boyle, R. W., Alexander, W. M., Aslin, G. E. M. (1975): Some observations on the solubility of gold. Geological Survey of Canada, Dept. of Energy, Mines and Resources, Paper 75-24, 6 p. Buerger, M. J. (1936): The symmetry and crystal structure of the minerals ...Ivana N. Jelić. Arsenopirit iz rudnih ležišta Šumadijsko-kopaoničke oblasti: paregeneza, sastav i produkti oksidacije, Beograd : [I. Jelić], 2023
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Understanding partitioning of deformation in highly arcuate orogenic systems: Inferences from the evolution of the Serbian Carpathians
Nemanja Krstekanić, Liviu Matenco, Marinko Toljić, Oleg Mandić, Uroš Stojadinović, Ernst Willingshofer (2020)... hist facies in the Fig. 4. Geological cross sections across the studied area. Cross sections are built following the field observations and results of this study. Surface to depth projection is based on the field kinematic data from this study and the Basic geological map of former Yugoslavia, scale ...
... the position of the inset in right part of the figure. Inset: Simplified geological map of a segment of the Senje-Resava Basin thrusted by Permian sediments of Upper Getic sub-unit (simplified and modified after Basic geological map of former Yugoslavia, scale 1:100.000 and data from this study). P-Permian ...
... represented by early Miocene sedimentary sequence of the coal-bearing Senje–Resava Basin. Inset illustrates simplified geological map of the area shown in the photo (modified after Basic geological map of former Yugoslavia, scale 1:100.000) with the position of the camera (black dot) and the azimuth of camera ...Nemanja Krstekanić, Liviu Matenco, Marinko Toljić, Oleg Mandić, Uroš Stojadinović, Ernst Willingshofer. "Understanding partitioning of deformation in highly arcuate orogenic systems: Inferences from the evolution of the Serbian Carpathians" in Global and Planetary Change, Elsevier BV (2020). https://doi.org/10.1016/j.gloplacha.2020.103361