Претрага
3552 items
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Osnaživanje energetske tranzicije u sektoru domaćinstva u Srbiji: integrativni pristup
Boban Pavlović (2023)Glavni cilj istraživanja bio je da se razvije metodološki pristup koji bi podržao proces energetskog planiranja tranzicije u grejanju domaćinstava, uzimajući u obzir specifičnosti ovog sektora. Kako bi se procenili mogući tokovi energetske tranzicije u grejanju domaćinstava i analizirali politički instrumenti za ubrzanje ovog procesa, razvijen je simulacioni model zasnovan na agentima (Agent Based Model – ABM). Simulacioni model je primenjen na slučaju energetske tranzicije u sektoru domaćinstva u Srbiji. Prethodno su kroz istraživanje prikupljeni podaci o grejanju domaćinstava ...energetska tranzicija, energetsko planiranje, energetsko modeliranje, obnovljivi izvori energije, domaćinstva, ponašanje potrošačaBoban Pavlović. "Osnaživanje energetske tranzicije u sektoru domaćinstva u Srbiji: integrativni pristup" in Energija, ekonomija, ekologija (2023)
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Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment, Geography, Planning and Development, Building and Construction... with conduit, channel orientation, hydrogeological function, etc.). Ultimately, the model was based on more than 360,000 data items [7]. The 2D model mesh is shown in Figure 4B. For the 3D karst groundwater model, the ArcGIS program was used, along; with some additional software [7]. Linked layers ...
... in a 3D environment, is 647.29 km. Detail of the model is shown in Figure 4C. For the purposes of defining the circulation conditions within the karst aquifer that drains via Krupaja Spring, parts of the model from the recharge to the discharge zone were used (Figure 4D) [19]. I, illl 3D Model ...
... spring area 3D model of karst conduits watershead borders Figure 4. Elements of the spatial model of the Krupaja Karst System; (A)—map of Beljanica karst massif including the position of hydrogeological, geological, geomorphological, and speleological features, (B) — 2D model mesh according; ...Ljiljana Vasić, Saša Milanović, Tina Dašić. "Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)" in Sustainability, MDPI AG (2023). https://doi.org/10.3390/su151411146
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Steel Arch Support Deformations Forecast Model Based on Grey–Stochastic Simulation and Autoregressive Process
Relatively large deformations of the steel arch support in underground coal mines in the Republic of Serbia present one of the main problems for achieving the planned production of coal. Monitoring of the critical sections of the steel arch support in the underground roadways is necessary to gather quality data for the development of a forecasting model. With a new generation of 3D laser scanners that can be used in potentially explosive environments (ATEX), deformation monitoring is facilitated, while ...čelična podgrada, prognoza deformacija, vremenske serije, grey-stohastička simulacija, autoregresija, podzemni rudnik ugljaLuka Crnogorac, Suzana Lutovac, Rade Tokalić, Miloš Gligorić, Zoran Gligorić. "Steel Arch Support Deformations Forecast Model Based on Grey–Stochastic Simulation and Autoregressive Process" in Applied Sciences, MDPI AG (2023). https://doi.org/10.3390/app13074559
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An oilfield in Libya: A new model to enhance waste water disposal
Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković. "An oilfield in Libya: A new model to enhance waste water disposal" in Energy & Environment (2016)
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Razvoj algoritma fuzzy optimizacije u hidrodinamičkoj analizi za potrebe projektovanja sistema odbrane od podzemnih voda
Dragoljub Bajić, Dušan Polomčić (2019)Sistemi za odbranu od podzemnih voda se koriste za zaštitu hidrotehničkih objekata, priobalja, meliorativnih područja, naselja, rudnika, industrijskih područja, predstavljajući značajne segmente bez kojih bi funkcionalnost ovih objekata i područja bila dovedena u pitanje. Posebno složeni sistemi odbrane od podzemnih voda se karakterišu kod ležišta mineralnih sirovina, imajući u vidu njihovu dinamičnost, koja se ogleda u stalnom širenju ležišta, kao i činjenicu da ova ležišta prodiru duboko u stensku masu različitog strukturnog tipa poroznosti, a time i u podzemne ...upravljanje podzemnim vodama, hidrodinamički model, fuzzy logika, trougaoni fuzzy brojevi, znanje eksperta, optimizacijaDragoljub Bajić, Dušan Polomčić. "Razvoj algoritma fuzzy optimizacije u hidrodinamičkoj analizi za potrebe projektovanja sistema odbrane od podzemnih voda" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2019). https://doi.org/10.5937/tehnika1904527B
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The Impact Assessment of NO2 Emission from District Heating Plant on Local Air Quality, the Case of Zemun, Belgrade
The Belgrade district heating system relies on fossil fuels in heat production, where natural gas has the largest share of around 95% and fuel oil with around 4.4%. The Zemun heating plant is completely fueled with fuel oil. Currently, it is the largest plant that is not fueled with natural gas. The objective of this paper is to assess the impact of NO2 from the Zemun heating plant on local air quality by analyzing and comparing the concentration of ...NO2, Zagađenje vazduha, Kvalitet vazduh na lokalnom nivou, Model disperzije, AERMOD, Daljinsko grejanje, BeogradBoban Pavlović, Uroš Pantelić, Marija Živković, Dejan Ivezić. "The Impact Assessment of NO2 Emission from District Heating Plant on Local Air Quality, the Case of Zemun, Belgrade" in Conference on Sustainable Development of Energy, Water and Environment Systems, Dubrovnik, 10.10.-15.10.2021., University of Zagreb, Zagreb, Croatia; Instituto Superior Técnico, Lisbon, Portugal (2021)
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Методологија интегралне анализе сценарија енергетског развоја
Александар Маџаревић (2019)енергетска безбедност, сценарио развоја, фази логика, сигурност снабдевања, доступност, расположивост, природни гас... РУДАРСКО-ГЕОЛОШКИ ФАКУЛТЕТ 22 МЕТОДОЛОГИЈА ИНТЕГРАЛНЕ АНАЛИЗЕ СЦЕНАРИЈА ЕНЕРГЕТСКОГ РАЗВОЈА • сценарија чије су основе пројекције развоја везане за математичке алате и моделе који се користе у процесу израде сценарија (Van Notten et al., 2003). Приступи засновани на моделима су јако драгоцени ...
... значај у односу на друге истиче или умањује. РУДАРСКО-ГЕОЛОШКИ ФАКУЛТЕТ 66 МЕТОДОЛОГИЈА ИНТЕГРАЛНЕ АНАЛИЗЕ СЦЕНАРИЈА ЕНЕРГЕТСКОГ РАЗВОЈА 5 МОДЕЛ ИНТЕГРАЛНЕ АНАЛИЗЕ СЦЕНАРИЈА ЕНЕРГЕТСКОГ РАЗВОЈА За потребе израде модела је анализирана група од три синтезна индикатора, која су прецизније ...
... адекватној форми уносе у сам модел интегралне анализе. Такви подаци се поступком фази пропозиције уносе у синтезни модел, где се даљим поступком фазификују и дефинишу као улазни подаци фази скупа. Истовремено се врши рангирање. Може се обављати већим бројем РУДАРСКО-ГЕОЛОШКИ ФАКУЛТЕТ 70 МЕТОДОЛОГИЈА ...Александар Маџаревић. Методологија интегралне анализе сценарија енергетског развоја, Рударско-геолошки факултет, 2019
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Coupling of artificial intelligence methods in the development of hybrid intelligent systems
In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije... module for the analysis of gas distribution in the ventilation system. In view of the complexity of the INVENTS system’s global model data structure, which had to model all relevant parameters of complex mine ventilation networks, the design and realization of database was executed in the MSAccess ...
... system for analysis of area airpollution load GIS PollutNet AIRPRES Expert system for air pol lution analysis Data model NM-GA prediction Characterization of ECO domain CFD model - Meteorology - Airpollution - Topology Monitoring Fig. 3 Structure of a hybrid system for analysis of area ...
... a software package that enables mine ventilation simulation in underground exploitation of ore deposits. The global structure of the mathematical model for ventilation simulation in mine ventilation networks, transformed into the SimVent software package is composed of the following modules: 1) ...Ranka Stanković, Ivan Obradović, Nikola Lilić. "Coupling of artificial intelligence methods in the development of hybrid intelligent systems" in X Kongres Matematičara, Matematički fakultet, Beograd (2001)
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Agent-based modeling as a support to an expert-based approach: Exploring individual heating systems transition
Expert-based energy scenarios are mainly developed following assumptions of experts and, in most cases, a limited number of stakeholders. Such an approach will provide satisfactory results in centrally managed energy sectors where further decisions could be envisaged relatively precisely (electricity production/distribution, district heating systems, etc.). The same approach will provide more uncertain outcomes of future energy structure in the household sector, where decisions related to consumption, selection of energy source, or application of specific technology are made by numerous ...Energetska tranzicija, Grejanje domaćinstava, Individualni sistemi grejanja, Energetsko planiranje, Integrisano energetsko planiranje, ABM, LEAP, SrbijaBoban Pavlović, Marija Živković, Dejan Ivezić. "Agent-based modeling as a support to an expert-based approach: Exploring individual heating systems transition" in South East European Conference on Sustainable Development of Energy, Water and Environment Systems 22 – 26 May 2022, Vlorë, Albania, Faculty of Mechanical Engineering and Naval Architecture, Zagreb (2022)
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Hibridni sistem za planiranje i analizu ventilacije rudnika
... širokog spektra problema koji postoje u mehanici fluida. Pretprocesiranje NISA/3D-FLUID sadrži pret-procesorski modul DISPLAY. Ovo je 3D interaktivni kolor grafički program sa velikim mogućnostima generisanja modela konačnih elemenata i definisanja problema. Osnovne mogućnosti modeliranja su sledeće: ...
... drvo, 121 Modeli, 20 Džeržinskog, 238 Danka, Muse-Džounsa, 238 deskriptivni, 20 fizički, 20 Grojera,238 matematički, 21 proceduralni, 20 simbolički, 20 Simoda, 238 strujanja fluida, 46 Mreža, 99 ventilaciona, 100 Mutacija, 166 N Navije-Stoksove jednačine, 58, 65 NEXPERT, 287 NISA/3D FLUID, 50, ...
... Turbulence Model On the Finite Elements Methods…………………………………………………………...75 Finite Elements Approximation The Algorithmic Concept of the Finite Elements Method Application of CFD Software in Solving Mine Chamber Ventilation Problems…….79 Characteristics of CFD software General Description of NISA/3D – FLUID ...Nikola Lilić, Ranka Stanković, Ivan Obradović. Hibridni sistem za planiranje i analizu ventilacije rudnika, Rudarsko-geološki fakultet, Univerzitet u Beogradu, 2000
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Part of Speech Tagging for Serbian language using Natural Language Toolkit
Ranka Stanković, Boro Milovanović (2020)Dok se razvijaju složeni algoritmi za NLP (obrada prirodnog jezika), osnovni zadaci kao što je označavanje ostaju veoma važni i još uvek izazovni. NLTK (Natural Language Toolkit) je moćna Python biblioteka za razvoj programa zasnovanih na NLP-u. Pokušavamo da iskoristimo ovu biblioteku za kreiranje PoS (vrsta reči) oznake za savremeni srpski jezik. Jedanaest različitih modela je kreirano korišćenjem NLTK API-ja za označavanje. Najbolji modeli se transformišu sa Brill tagerom da bi se poboljšala tačnost. Obučili smo modele na označenom ...... will be used for comparing different taggers. The simplest model in NLTK is Default tagger which tags every token with one selected PoS category [17]. Because the noun is by far the most represented PoS tag, the accuracy for this model on all tokens will be exactly 21,51%. This is the baseline tagger ...
... reasoning. NLTK API makes it possible to create multiple standalone tagger models as well as to combine them. We are going to try and test every model available in the version 3.5 released in March 2020. Having a plethora of different algorithms makes this library a good choice for a research. ...
... is picked. At the end of the chain, there is a rule which states that the word is of Noun category – same as for Default tagger. Obviously, this model AII 1.1.2 will perform better than the baseline tagger, but making the right rules demands significant effort. We did not invest much time in ...Ranka Stanković, Boro Milovanović. "Part of Speech Tagging for Serbian language using Natural Language Toolkit" in 7th International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2020, Academic Mind, Belgrade (2020)
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Building Terminological Resources in an e-Learning Environment
... istički rečnikRečnik geostatističkih pojmova i termina, koristi se za modeliranje buke, distribucije prašine, kreiranje geološkog modela ležišta mineralne sirovine. 1 encyclopedia ...
... UML (Unified Modeling Language) engineering model with a special structure has been developed, whose main features are depicted in Figure 2. Assuming basic familiarity with this language we will briefly comment this model. The class Rečnik in the model is the lexicographic superclass whose instances ...
... general concepts, form the basis of this model. Ontology processors use these ontologies to select the most suitable tutor for a student depending on the set of new concepts the student needs to learn. Domain expertise can be shared within this model, and it can also serve as a framework ...Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja. "Building Terminological Resources in an e-Learning Environment" in Proceedings of the Third International Conference on e-Learning, eLearning-2012, September 2012, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2012)
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Complex geophysical survey on solving the problem of water loss in the karst terrain reservoir
Branislav Sretković, Dejan Vučković (2023)Geophysical surveys in karst terrain are always a specific challenge. Each of them requires a careful consideration of the problem, specific conditions on the ground, the selection of adequate methods applicable in that specific and unique karst area. But they should have one thing in common: a complex approach and looking at the problem from wider to narrower, with a gradual narrowing of the investigation area, increasing the spatial precision and resolution of the obtained data. On the example of ...Branislav Sretković, Dejan Vučković. "Complex geophysical survey on solving the problem of water loss in the karst terrain reservoir" in 8th Symposium Geoscience 2023, Bucharest, 9-11. November 2023, Bucharest : Editura Cetatea de Scaun (2023)
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Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines
This paper presents the model for the identification of reference points on the lifetime curve of engineering systems. This curve commonly represents the increase and decline of failure in relation to time. A direct correlation between failure rate and costs is assumed in this paper, therefore, statistical and empirical analysis of costs provided reference points. This approach is used for positioning stages of the engineering system’s lifetime with a minimal number of failures and costs, regardless of whether these ...Electrical and Electronic Engineering,Industrial and Manufacturing Engineering, Control and Optimization, Mechanical Engineering, Computer Science (miscellaneous), Control and Systems EngineeringUgljesa Bugarić, Milos Tanasijević, Stevan Djenadić, Dragan Ignjatović, Ivan Janković. "Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines" in Machines, MDPI AG (2022). https://doi.org/10.3390/machines10110995
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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. ...... and Compu- tation 218(8), pp. 4295-4304, doi:10.1016/j.amc.- 2011.10.001, 2011. [18] Hudej M-M. Multivarijabilni modeli upravljanja u rudarstvu, Doktorska disertacija, Rudarsko-geološki fakultet, Beograd. pp. 32-40, 2013. SUMMARY ANALYSIS OF THE APPLICATION OF MULTI-CRITERIA METHODS IN OPTIMIZING ...
... Rudarsko-geološki fakultet, Beograd UDC: 622.271.5 PREDRAG D. JOVANČIĆ, Univerzitet u Beogradu, 621.879.45 Rudarsko-geološki fakultet, Beograd DOI:10.5937/tehnika1903369D DRAGAN M. IGNJATOVIĆ, Univerzitet u Beogradu, Rudarsko-geološki fakultet, Beograd ...
... mašine. Beograd: Rudarsko- geološki fakultet, skripta, 285-290, 2013. [3] Studija „Optimizacija organizacije sredstava i troškova pomoćne mehanizacije u cilju povećanja stepena iskorišćenja jalovinskih i ugljenih sistema na površinskim kopovima EPS-a“, Rudarsko-geološki fakultet, Beograd, 2018. ...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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Towards a Mining Equipment Ontology
... equipment. The structure of RudOnto can be described by an UML (Unified Modeling Language) model, as depicted in Figure 2. A brief description of this model follows. The lexicographic superclass within the model is the class Rečnik, implemented as an abstract class. Concepts, which can be either general ...
... domain. At the same time an ontology is a data model of the domain and it can be used for drawing inferences on the basis of the information stored in the objects within that domain and the interconnections existing between them. 3 2.2. Model of the RudOnto terminological resource RudOnto ...
... relation in the model is implemented by involution, which means that a hyponym can appear only once in the resource hierarchy, with only one hypernym above it. Other semantic relations between concepts are enabled by the RelacijeTermina class, whereas the MultijezičkiLeks class in the UML model is used for ...Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja. "Towards a Mining Equipment Ontology" in Proceedings of the 12th International Conference Research and Development in Mechanical Industry, RaDMI 2012, September 2012, Vrnjačka Banja, Serbia no. 1, Vrnjačka Banja, Serbia : SaTCIP (Scientific and Technical Center for Intellectual Property) Ltd. (2012)
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Threshold-induced correlations in the Random Field Ising Model
... correlations in the Random Field Ising Model Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Threshold-induced correlations in the Random Field Ising Model | Sanja Janićević, Dragutin Jovković ...
... the inset - distributions D(S) of size S obtained in simulations of 3D RFIM systems with a single value of lattice size L = 1024 and disorder R = 2.25 Figure 1. �resholding of RFIM signal. �e signal is obtained in simulations of 3D system with size L = 1024 and 40 random �eld con�gurations for each ...
... Random Field Ising Model Sanja Janićević1, Dragutin Jovković1, Lasse Laurson 2,3 & Djordje Spasojević1 We present a numerical study of the correlations in the occurrence times of consecutive crackling noise events in the nonequilibrium zero-temperature Random Field Ising model in three dimensions ...Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević. "Threshold-induced correlations in the Random Field Ising Model" in Scientific Reports, Springer Science and Business Media LLC (2018). https://doi.org/10.1038/s41598-018-20759-6
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Transition pathways of household heating in Serbia: Analysis based on an agent-based model
To explore pathways of the energy transition of household heating, an agent-based simulation model was developed for the case of the Serbian household sector. The model is focused on individual entities (households) with the objective to explore the effects of policy instruments on energy transition in households with individual heating systems. Empirically collected survey data were used as input for households’ attitudes towards sustainable heating. Simulations showed that the proposed instruments would lead to higher heating efficiency and less ...energetska tranzicija, modeliranje bazirano na agentima, sistemi grejanja, sektor domaćinstva, obnovljivi izvori energije, emisija CO2Boban Pavlović, Dejan Ivezić, Marija Živković. "Transition pathways of household heating in Serbia: Analysis based on an agent-based model" in Renewable and Sustainable Energy Reviews, Elsevier BV (2022). https://doi.org/10.1016/j.rser.2022.112506
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A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers
Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić. "A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers" in International Journal of Industrial Engineering: Theory, Applications and Practice (2019)
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Uporedna analiza stabilnosti završnih kosina površinskog kopa „Veliki Krivelj“
Mihajlo Topalović (2023)Površinski kop „Veliki Krivelj“ nalazi se u blizina grada Bora i u neposrednoj blizini sela Krivelj. Od 2018. godine je u vlasništvu kineske kompanije „Zijin“ koja ima udeo od 63% vlasništva celokupnog RTB-a Bor. Na površinskom kopu obavlja se masovna eksploatacija rude bakra opremom visokog kapaciteta. Za bušenje se koriste bušilice prečnika od 250 do 310 mm, a za utovar minirane rude i jalovine bageri čija je zapremina kašike 15 m3 i 22 m3. Za površinski kop „Veliki Krivelj“ ...Mihajlo Topalović. Uporedna analiza stabilnosti završnih kosina površinskog kopa „Veliki Krivelj“, 2023