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Упит dcterms_subject_txt:hybrid systems

519 items

  • INVENTS: A Hybrid Mine Ventilation Planning and Design System

    Lilić Nikola, Stanković Ranka, Obradović Ivan (2013)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    hybrid systems, mine ventilation, expert systems
    ... creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we present the design methodology of the hybrid system INVENTS, as well as system structure and user interface. Keywords: hybrid systems, mine ventilation ...
    ... process. 2. The INVENTS hybrid system Following the outlined strategy of planing, analysis and management of mine ventilation, a hybrid system named INVENTS has been developed, its architecture and concept being the subject of this book. Figure 2 illustrates the place hybrid system INVENTS has in ...
    ... Измењено: 2023-10-14 03:23:37 INVENTS: A Hybrid Mine Ventilation Planning and Design System Lilić Nikola, Stanković Ranka, Obradović Ivan Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] INVENTS: A Hybrid Mine Ventilation Planning and Design System | Lilić ...

  • Coupling of artificial intelligence methods in the development of hybrid intelligent systems

    Ranka Stanković, Ivan Obradović, Nikola Lilić (2001)
    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
    ... ventilation, as an example of intercommunicating hybrid systems, and a system for the analysis of area air pollution load, with characteristics of both function-replacing and intercommunicating hybrid systems. Key words: hybrid intelligent systems, coupled systems, artificial intelligence methods, mining ...
    ... 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 ...
    ... alone. Hybrid intelligent systems [1] are an attempt to solve these complex problems by coupling two or more AI methods, but also by integrating AI methods and conventional computer systems, such as database or spreadsheet applications. In this paper we present two hybrid intelligent systems which ...

  • Развој хибридног модела за оптиматизацију завршне контуре одлагалишта у површинској експлоатацији лежишта минералних сировина

    Aлександар Додеровић (2024)
    Површинска експлоатација минералних сировина захтијева претходно откопавање значајних( милионских) количина јаловине, које је неопходно транспортовати до локације на којој ће сеона трајно одложити. Традиционални приступ избора локације и дизајна одлагалишта се карактерише парцијалним приступом, заснованом на анализи неколико водећих критеријума као и на личном искуству инжењера, често занемарујући синергетски ефекат осталих утицајних фактора Технолошке операције које се односе на манипулацију јаловином, међу којима предњачи транспорт, генеришу највећи дио трошкова у површинској експлоатацији. Такође, цјелокупан процес експлоатације додатно је ограничен ...
    оптимизације завршне контуре одлагалишта, хибридни модел, површинска експлоатација, генетски алгоритам

  • Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability

    Marija Živković, Dejan Ivezić (2021)
    Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...
    рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија
    ... values of the indicators vary for the different DH systems. Table 2 presents values for the biggest systems in Serbia. Fig. 3 Overview of district heating systems in Serbia, by fuel and by size M. Živković, D. Ivezić 1 3 It can be seen that DH systems with the lowest primary energy factor and carbon ...
    ... and conclusion Energy systems in the future should be sustainable, opti- mized, and low carbon systems (Mazhar et al. 2018). With possibilities to accomplish all aforementioned requirements, district heating systems are being transformed into essential components of future energy systems in cities. The pathway ...
    ... is tested on district heating systems in Serbia, as a case study. The Serbian district heating systems currently belong to second-generation DH systems and need to follow guidelines for these types of energy system in order to transform to more advanced systems. Utilization of renewable energy ...

  • Towards more sustainable district heating systems in Serbia - Options and obstacles

    Marija Živković, Boban Pavlović, Dejan Ivezić, Miloš Tanasijević, Dejan Stojanović (2024)
    The major share of energy consumed in the building environment is dedicated to meeting heating needs, which makes this sector one of the key players in the transformation of the whole energy system. The accurate approach to the transition process assumes acting on both the demand and supply sides. Lately, the supply side has received more attention, as its transformation is one of the key steps of the energy transition process. District heating systems are recognized as substantial contributors ...
    energetska tranzicija, daljinsko grejanje, dekarbonizacija, obnovljivi izvori energije, prepreke, Srbija

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving

  • A tool for identifying the criticality in the disordered systems with metastable dynamics

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević (2021)
    Физика кондензоване материје

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • Ventex: an expert system for mine ventilation systems analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    roblems relating to mine ventilation systems analysis are usually of a very complex nature. They involve the estimation of numerous interdependent parameters pertaining to the network status, ventilation status, ventilation system stability, air current losses, climate conditions, gas state, fire risk and dangerous dust pollution risk. The solution to these problems relies, to a great extent, on numerical methods. With the development of computer technology these methods were incorporated as numerical routes in software packages, such as the mine ...
    expert system, mine ventilation

  • Agent-based modeling as a support to an expert-based approach: Exploring individual heating systems transition

    Boban Pavlović, Marija Živković, Dejan Ivezić (2022)
    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, Srbija

  • A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić (2023)
    This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...
    системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFIS

  • Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević (2019)
    Изингов модел, критично понашање, танки системи

  • Life Cycle Assessment of Individual Wood Biomass Heating Systems in Households

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    The use of solid fuels (wood biomass and coal) for heating of households continues to be common practice within European countries. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter. In this study, a life-cycle assessment (LCA) of firewood-based and pellet-based heating systems is performed. These two systems represent two different types of individual wood biomass heating systems. In the case of the firewood-based heating systems, it is analyzed a typical stove ...
    Grejanje, Analiza životnog ciklusa, Drvna biomasa, Individualni sistemi grejanja
    ... life-cycle assessment (LCA) of firewood-based and pellet-based heating systems is performed. These two systems represent two different types of individual wood biomass heating systems. In the case of the firewood-based heating systems, it is analyzed a typical stove in Serbian households, and in the case ...
    ... cycle assessment of residential heating systems: a comparison of distributed and centralized systems, Energy Procedia, Vol. 104, pp. 287-292. [10] Shah, V.P., Col Debella, D., Ries, R.J. (2008). Life cycle assessment of residential heating and cooling systems in four regions in the United States, Energy ...
    ... Assessment of Individual Wood Biomass Heating Systems in Households Boban Pavlović, Dejan Ivezić, Marija Živković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Life Cycle Assessment of Individual Wood Biomass Heating Systems in Households | Boban Pavlović, Dejan ...

  • Nonequilibrium athermal random-field Ising model on hexagonal lattices

    Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević (2021)
    Изингов модел, хексагонална решетка

  • Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry

    Steven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti (2021)
    Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...
    self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalization

  • Challenges of Energy Transition in the Individual Heating Sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2022)
    U radu su prikazani rezultati istraživanja i ankete koja je sprovedena 2020. godine u domaćinstvima sa individualnim sistemima grejanja u Srbiji. Cilj ankete je bio da se sagleda stanje individualnih sistema grejanja, ali i stavovi vlasnika sistema vezano za energetsku tranziciju. Rezultati ukazuju na zastarelost sistema grejanja, nisku efikasnost, nedovoljna ulaganja u primenu mera energetske efikasnosti i nedostatak finansijskih sredstava za ulaganje u održivo grejanje. Osnovni prioriteti kod izbora načina grejanja jesu troškovi kupovine sistema i troškovi energenta, dok ...
    Energetska tranzicija, Individualni sistemi grejanja, Stavovi domaćinstava, Anketa, Srbija

  • Why classical sequence stratigraphy doesn't work in Pannonian basin?

    Dejan Radivojević (2018)
    basen iza ostrvskog luka, detačment, miocen, Panonski basen, riftogeneza, sekvenciona stratigrafija
    ... flooded this systems tract  is very hard to distinguished from early rift climax systems tract.  Besides  initial rift systems tract also early (S3a), middle (S3b) and  late (S3c) rift climax systems  tract  is alinated.  In grabens with  low  subsidence, one or more of  that  systems  tract could be absent ...
    ... some places close to the fault it has hummocky geometry. This systems tract is not confirmed in all half‐ graben and could be related to the moment of  initial rifting  in certain graben. Essentially  it represents  initial  rifting  systems  tract  formed  in  continental/alluvial  environment  (Prosser ...
    ... ably below seismic resolution level, so their recognition was not possible. The early rift cli‐ max systems tract usually ends up with downlap on pre‐Tertiary formations or on the initial rift systems  tract. Early rift climax sediments are usually present only in deep parts of the basin. The reason ...

  • Sustainable transition of district heating systems in Serbia, or can engineers do it alone?

    Ivezić Dejan, Živković Marija (2018)

  • Available technological procedures for capturing CO2 in the industrial and power generation sectors

    Lola Tomić, Vesna Karović Maričić, Dušan Danilović, Branko Leković, Miroslav Crnogorac (2021)
    Climate change is a major environmental issue caused by anthropogenic emissions of greenhouse gases. Capturing CO2 and storing it in suitable geological formations is one of the main technological solutions that can provide mitigation of CO2 emission into the atmosphere. Capturing CO2 represents the first phase in process of carbon capture and storage, and includes the application of various technologies for the separation of CO2 produced in the energy and industrial sectors. There are four main systems for capturing ...
    capturing CO2, power plants, CO2 capture systems, CO2 technologies
    ... mailto:dusan.danilovic@rgf.bg.ac.rs mailto:branko.lekovic@rgf.bg.ac.rs mailto:miroslav.crnogorac@rgf.bg.ac.rs 250 2. CO2 CAPTURE SYSTEMS There are four main systems for capturing CO2 that can prevent releasing CO2 into the atmosphere, such as: capturing from industrial process stream, capturing ...
    ... CO2 capture systems depends on more factors. Post-combustion CO2 capture is the most mature option, and it can be integrated into existing power plants. The main disadvantage of post- combustion is low concentration of CO2 (5-15%) that affects the capture efficiency. Pre-combustion systems are more suitable ...
    ... au/about-ccus/carbon-capture/ https://www.ccsbrowser.com/ https://netl.doe.gov/research/coal/energy-systems/gasification/gasifipedia/capture-approaches https://netl.doe.gov/research/coal/energy-systems/gasification/gasifipedia/capture-approaches https://www.globalccsinstitute.com/about/what-is-ccs/capture/ ...

  • Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović (2022)
    This work presents a model for determining the availability of continuous systems at open pits by applying fuzzy logic and fuzzy inference systems. The applied model was formed by the synthesis of independent partial indicators of availability. The model is based on an expert system for assessing the availability of continuous mining systems. The availability of the system, as a complex state parameter, is decomposed into the partial indicators, reliability, and convenience of maintenance, and the fuzzy compositions, used ...
    системи, континуални систем експоатације, површински коп, рударство, расположивост, фази логика, max–min композиција, min–max композиција