Претрага

Упит dcterms_subject_txt:continuous part of combined system (CCS)

2852 items

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    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 ...
    ... category of coupled numerical and symbolic systems (Kowalik, 1986). The numerical part consists of SimVent simulation routines and the symbolic part of the mine ventilation expert’s knowledge. Fig. 8. Database structure of the SimVent package Successful implementation of a coupled system requires ...
    ... secures the openness of the hybrid system INVENTS for a connection with different environments. Figure 8 depicts the structure of the database part relevant to SimVent through the MSAccess Relationships panel. The VENTEX system was developed as a knowledge-based (symbolic) upgrade of the SimVent numerical ...
    ... requires the solving of a number of complex problems in order to obtain efficient communication between the symbolic and the numerical part of the system. In order to cope with this problem a separation of processes in coupled systems into independent modules is suggested. Furthermore, information interchange ...

  • Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining

    Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović (2019)
    Analitički hijererhijski proces (AHP), dozeri, eksploatacija uglja, površinski kopovi
    ... Abstract: In a continuous system of production in open-cast coal mining, in addition to the basic machinery which consists of highly productive machines (bucket-wheel excavators, bucket-chain excavators, spreaders, conveyor-belt transporters, etc.) that provide an uninterrupted exploitation of mineral ores ...
    ... Abstract: In a continuous system of production in open-cast coal mining, in addition to the basic machinery which consists of highly productive machines (bucket-wheel excavators, bucket-chain excavators, spreaders, conveyor-belt transporters, etc.) that provide an uninterrupted exploitation of mineral ores ...
    ... the comparison of pairs, and the synthesis of priorities. Energies 2019, 12, 2245 4 of 16 Energies 2019, 12, x FOR PEER REVIEW 4 of 16 3. The calculation of the individual priorities of the criteria weight, sub-criteria and alternatives weights, which are afterwards combined into the total ...

  • The correlation of Upper Miocene lithostratigraphic units of the southern part of the Pannonian basin

    Filip Anđelković, Dejan Radivojević (2019)
    gornji miocen, litostratigrafske jedinice, formacije, Panonski basen
    ... correlation of Upper Miocene lithostratigraphic units of the southern part of the Pannonian basin Filip Anđelković, Dejan Radivojević Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The correlation of Upper Miocene lithostratigraphic units of the southern part of the ...
    ... . Such correlation has great significance for the knowledge of the Pannonian Basin System. Besides that, it also has a practical role: a better understanding of the time and character of deposition leads to a better understanding of petroleum gelogy. Further in the text, those units with formation ...
    ... УЧЕШЋЕМ 299 KORELACIJA GORNJOMIOCENSKIH LITOSTRATIGRAFSKIH JEDINICA JUŽNOG DELA PANONSKOG BASENA THE CORRELATION OF UPPER MIOCENE LITHOSTRATIGRAPHIC UNITS OF THE SOUTHERN PART OF THE PANNONIAN BASIN Filip Anđelković1 , Dejan Radivojević2 1Rudarsko-geološki fakultet Univerziteta u Beogradu ...

  • Development of terminological resources for expert knowledge: a case study in mining

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Aleksandar Cvjetić (2015)

  • Crystal structure of K3EuSi2O7

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu
    ... University of Belgrade, Faculty of Mining and Geology, Department of Mineralogy, Crystallography, Petrology and Geochemistry, Laboratory of Crystallography, Đušina 7, Belgrade 11000, Serbia (Received 18 February; Revised 15 March 2021; Accepted 31 March 2021) Abstract: As a part of the research of the ...
    ... Silicates containing rare-earth elements (REE silicates) are the subject of intense research in recent decades. Many studies were performed on REE silicates because of a wide range of optical and magnetic properties combined with high thermal stability.1‒9 All this makes them very interesting and ...
    ... X-ray diffraction. It crystallizes in the space group P63/mcm. In the crystal structure of the title compound, one part of the Eu cations are in a slightly distorted octahedral coordination and the other part are in an ideal trigonal prismatic coordination environment. The disilicate Si2O7 groups ...

  • 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
    ... ro. 2019. 119583 Standard EN 15316-4-5 (2017) Energy performance of buildings— Method for calculation of system energy requirements and system efficiencies—Part 4–5. District heating and cooling Statistical Office of the Republic of Serbia (2013) Installations and aux- iliary premises in dwellings ...
    ... for the determination of technical poten- tial of sewage wastewater heat, availability of heat energy and evaluation of the effects of its utilization on sustainable development goals contains three parts (Fig. 1). The first part aims to provide a current state overview of existing district heating ...
    ... Energy content of input to the system of the ith renewable energy carrier Qext,RES Externally supplied heat produced from renewables Kp,dh Carbon dioxide emission coefficient E i Energy content of input to the system of the ith energy carrier Kpi Primary CO2 emission coefficient of the ith ...

  • 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

  • Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu (2020)
    Geochemistry and Petrology

  • To what extent reactivated faults are (not) responsible for karst process: example from Serbian Carpatho-Balkanides?

    Ana Mladenović, Jelena Ćalić (2023)
    Carpatho-Balkanides represent part of the complex Dinaric – Carpatho – Balkan orogenic system, that geomorphologically dominates the central part of the Balkan Peninsula. The existence of this orogenic system is a result of closure of the Neotethys ocean and subsequent convergence of the Adriatic microplate and the Eurasian continent, that has been still active in the recent times. Such geodynamic characteristics conditioned complex tectonic structures, multiply reactivated during Late Cretaceous and Cenozoic times. The main aim of this work ...
    Carpatho-Balkanides, karst caves, reactivated faults, transpressional tectonics

  • A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)

    Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin (2016)
    ... (2011) Modelling of changes of hydrodynamic conditions in the aquatic environment of the Maczki-Bór sand pit due to the fact of planned closure of mining operations (NE part of Upper Silesian Coal Basin - Poland). In: RÜDE R. T., FREUND A. and WOLKERSDORFER, CH. (eds.) Proceedings of the 11th Int ...
    ... ics of a hydrogeologic system are its geometry (i.e. spatial distribution of water-bearing media) and filtration properties. Hydrogeologic modeling is schematization of the hydrogeologic system, due to the hydrogeologic and hydrodynamic complexity of the conditions, and includes modeling of the (Polomčić ...
    ... management of groundwater sources in intergranular porous media. Belgrade: University of Belgrade, Faculty of Mining and Geology. POLOMČIĆ, D. (2002). Schematization types of hydrogeological system for setting up the hydrodynamic model. In: Proceedings of the XIII Yugoslav symposium of hydrogeology ...

  • 3D modeling and monitoring of karst system as a base for its evaluation and utilization: a case study from eastern Serbia

    Saša Milanović, Zoran Stevanović, Ljiljana Vasić, Vesna Ristić-Vakanjac (2013)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • The state and perspective of the natural gas sector in Serbia

    Dejan Ivezić, Marija Živković, Dušan Danilović, Aleksandar Madžarević, Miloš Tanasijević (2016)
    The strategy of long-term energy development of Serbia identifies an increase of share of natural gas in final energy consumption as one of the main aims. Serbia has signed a strategic agreement with the Russian Federation on cooperation in the oil and gas sector, within which the project South Stream pipeline is planned to be realized. In addition, the Republic of Serbia has signed the Treaty that establishes the Energy Community and accepted the obligation to implement the Energy ...
    Consumption, natural gas, scenarios of development

  • 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)
    orogeneza, oroklini, višesmerna ekstenzija, transkurentna kretanja, Srpski Karpati
    ... number of N-S oriented and W-dipping normal faults clustered in the immediate vicinity of the Upper Getic/ Lower Getic contact indicates a larger amount of extension in the Mor- ava Valley Corridor and the Senje–Resava Basin. It is likely that these two basins were initially continuous and part of a larger ...
    ... types can be actually grouped in a continuous late Oligocene–early middle Miocene tectonic event that took place during the overall clockwise rotation of the Serbian Carpa- thians, accommodated by the 100 km cumulated offset of the curved Cerna-Timok Fault system. One can obtain the previously reported ...
    ... narrow system of two nappes located in the upper part of the Getic unit that contain Triassic–Jurassic sediments and are found immediately beneath the main Supragetic thrust (the Sas- ca–Gornjac and Resita nappes, Iancu et al., 2005a). These nappes were interpreted to be the equivalent of the Upper ...

  • WebGIS Cadastre of Abandoned Mines in Autonomous Province of Vojvodina

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2015)
    ... a landfill, workshop or plant. Figure 1 shows part of the conceptual data model. Figure 1 Characteristic part of the conceptual model 3. SYSTEM IMPLEMENTATION 3.1 Development environment The relational database management system used was PostgreSQL with the PostGIS extension to ...
    ... flexible way [13] The WebGIS application of the Cadastre of abandoned mines of Vojvodina is publicly available at http://kanakov.vojvodina.gov.rs. Figure 2 depicts the home page where the central part of the screen shows a map which can have one of the following Google Maps as underlying: Physical ...
    ... status of the object, etc. The lower part of the screen displays a list of abandoned pits that match the query, and the user has the option to view each of them in more detail: to zoom or read the record stored in the database. In the upper right corner there is a link for registration of users ...

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • Permanent GNSS monitoring of landslide Umka

    Mileva Samardžić Petrović, Jovan Popović, Uroš Đurić, Biljana Abolmasov, Marko Pejić, Miloš Marjanović (2020)
    Клизиште Умка је једно од највећих насељених активних клизишта у Србији. Активност клизишта Умка се прати већ више од 85 година, различитим геотехничким и геодетским техникама. Од 2010. године, активност kлизишта се континуирано прати у реалном времену аутоматизованим перманентним системом за праћење базираним на Глобалним навигационим сателитским системима (ГНСС). Поред тога, од 2018. године активност клизишта се додатно прати кинематичким ГНСС одређивањем положаја скупа карактеристичних тачака као и применом UAV фотограметрије. Главни циљ овог рада је приказ резултата опажања три ...
    клизиште, перманентно праћење, ГНСС
    ... ns of the technical part and the main characteristics of the established automated GNSS monitoring system can be find in Erić et al. [6]. Generally, the Umka monitoring system consists of GNSS network and supporting software solutions. The first part of the system, the network, consists of several ...
    ... the landslide area and they are the integral part of the Active Geodetic Reference Network of Serbia (AGROS), which is a permanent GNSS service for accurate satellite positioning over the Republic of Serbia territory. The second part of the system are the two Leica Geosystems software solutions: ...
    ... possible disasters [1-5]. Considering the importance of the Umka urban area permanent monitoring, automated GNSS monitoring system was established in March 2010. This was a part of the technological development project “The application of GNSS and LIDAR technology for infrastructure facilities ...

  • An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System

    Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović (2006)
    In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...
    ... support System), which consists of a part of sublimated reports intended for the management structure of the company referring to production monitoring and coal preparation. The presented methodology has already been applied in Coal Mine Pljevlja aimed at monitoring and management of coal production ...
    ... production system, equipment or its component part, as well as by the breakdown type or more detailed causes. Slicing and dicing refers to the ability to look at the database from different viewpoints. One slice of the human resources cube can represent all employees of the same age, another of the same ...
    ... (hand-brake pushing system, cab assembly), to the very machines (dump truck, grader) are entered in the lists of equipment types. Detailed information has to be entered for every part mentioned above. Figure 2 shows a hierarchical tree with equipment components, and respective part characteristics ...

  • Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs

    Saša Milanović, Ljiljana Vasić (2021)
    Earth and Planetary Sciences (miscellaneous), Water Science and Technology

  • Investigating distant effects of the Moesian promontory: Brittle tectonics along the western boundary of the Getic unit (East Serbia)

    Ana Mladenović, Milorad D. Antić, Branislav Trivić, Vladica Cvetković (2019)
    In this study, we report evidence for brittle deformation in a part of the Carpatho–Balkan orogen, which is explained in terms of effects of the rigid Moesian promontory of the European plate on fault kinematics in East Serbia. We focus on the westernmost part of the Getic Unit of the East Serbian Carpatho–Balkanides, i.e. the Gornjak–Ravanica Unit, located between two main thrusts that were repeatedly activated from Early Cretaceous to recent times. We combine a new data set on ...
    Getikum, Mezijska jedinica, Karpato-balkanski orogen, krte deformacije, Gornjačko-ravanička jedinica

  • Threshold-induced correlations in the Random Field Ising Model

    Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević (2018)
    Multidisciplinary
    ... continuously varies with (continuous) time t, and let V(t) > 0 at any moment of time when the system is active, while V(t) = 0 otherwise. Such signal is a sequence of avalanches, separated by intervals of time when the system is quiet, each avalanche being a continuous burst of values V(t) > 0 taken at ...
    ... ; 1 10° 10! 10? 108 10+ 101 10! T Vay? Figure 1. Thresholding of RFIM signal. The signal is obtained in simulations of 3D system with size L= 1024 and 40 random field configurations for each disorder R. (a) For a (blue) part of a train of avalanches (shown in bottom, and zoomed in top panel) and the ...
    ... to the recently reported case of the other crackling noise system of crack line propagation30, we also �nd that the waiting time distribution, upon a process of thresholding, becomes of a power law type, indicating the onset of the apparent correlations in the system. Results �resholding is a procedure ...