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Упит dcterms_subject_txt:Named Entity Recognition Systems

557 items

  • Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)

    Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from raw immature oil shale samples from the Lower Miocene Aleksinac Basin (Serbia) and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is determined. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently ...
    ... biomarkers in initial bitumen isolated from raw immature oil shale samples and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is ...
    ... Gajica et al., 2017). Pyrolytic experiments were performed in open (OS, Pyrolyser, Model MTF 10/15/130 Carbolite, UK) and closed (CS, autoclave) systems at a temperature of 400 °C for 4 h. The biomarker signatures were evaluated using gas chromatography-mass spectrometry and carbon specific isotope ...

  • Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje

    Marko Lazić, Filip Miletić, Milena Lekić, Veljko Rupar, Željko Petrović, Lazar Žujović (2021)
    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.
    proizvodnja uglja, zastoji, metode višekriterijumskog odlučivanja
    ... (2011). Deriving preference order of open pit mines equipment through MADM methods: Application of modified VIKOR method. Expert Systems with Applications, 38(3), 2550-2556;Systems with Applications, 121, 393-417; [9] Tsaur R–C.,,Decision risk analysis for an interval TOPSIS method” Applied Mathematics and ...
    ... Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje Exploatation effects of coal systems on the open pit mine Tamnava–West field Marko Lazić[footnoteRef:1], Filip Miletić[footnoteRef:2], Milena Lekić2, Veljko Rupar2, Željko Petrović[footnoteRef:3] ...
    ... nisu međusobno uporedivi, u radu su korišćene metode višekriterijumskog odlučivanja. Abstract: This paper analyzed the exploitation effects of coal systems at the open–pit mine Tamnava–West field for the first six months of the current year. The analysis was performed in the aspect of reached production ...

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... modules of calculation of SRP systems as a Prosper — RodStar - Includes methods for analyzing the dynamics of sucker rods and wave effects in pumping systems. 34 — QROD - Utilizes the wave equation for the analysis and optimization of sucker rod pumping systems, focusing on dynamic responses ...
    ... dynamic effects in pumping systems, including sucker rod pumps. 5.1 RodStar RODSTAR is a powerful, easy-to-use rod pumping system simulator and design tool. With RODSTAR you can design new rod pumping installations or make changes to existing rod pumping systems. It is a tool that you can use ...
    ... the performance of sucker rod pump systems and reduce operational costs. By comparing different programs in this study, we conclude that the RODSTAR program delivers the best and most optimal results, as it is specifically specialized for sucker rod pump systems and incorporates inclinometry into ...

  • Тhe Properties of Modifications of Newton’s Method For Solving Nonlinear Equations

    Ralević Nebojša, Ćebić Dejan (2013)

  • Identification of the Best Available Renewable Energy Source for Electricity Production in Serbia

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    Around 2/3 of electricity production in Serbia originates from coal-fired thermal power plants. The most significant domestic coal deposits are lignite deposits, a type of low -quality coal that causes negative health, climate and environmental impacts during the combustion. To reduce those negative impacts on domestic electricity production and to promote environmental awareness, the Serbian Energy Sector Development Strategy and the National Action Plan for Use of Renewable Energy Sources indicate the plan for increasing the share of ...
    Strategija obnovljive energije, Održiva energija, Proizvodnja električne energije, Solarna energija, Biomasa, Hidroenergije, Energija vetra
    ... Electricity Production in Serbia | Boban Pavlović, Dejan Ivezić, Marija Živković | Conference on Sustainable Development of Energy, Water and Environment Systems, Sarajevo, 28.6.-2.7.2020. | 2020 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005061 Дигитални репозиторијум Рударско-геолошког факултета Универзитета ...

  • A variant of two-step optimal fourth-order iterative method for solving nonlinear equation

    Ralević Nebojša, Ćebić Dejan (2014)

  • Hydrodynamic characteristics of water supply source of Kikinda (Serbia)

    Polomčić Dušan, Bajić Dragoljub, Matić Ivan, Zarić Jelena (2013)

  • Enhanced Anaerobic Bioremediation Using Emulsified Vegetable Oils

    Zarić Jelena, Bajić Dragoljub, Polomčić Dušan, Petronijević Nela (2013)

  • Long-Term Planning Methodology for Improving Wood Biomass utilization

    Vukašinović V., Gordić D., Živković Marija, Končalović D., Živković D. (2018)

  • The third order mean-based Jarratt-type method for finding simple roots of nonlinear equation

    Ralević Nebojša, Ćebić Dejan, Pavkov Ivan (2015)

  • Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)

    Miloš Radonjić (2020)
    This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...
    Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides
    ... doi: 10.1306/06101615095 ZAVALA, C., ARCURI, M. & BLANCO VALIENTE, L. (2012): The importance of plant remains as a diagnostic criteria for the recognition of ancient hyperpycnites.– Revue de Paléobiologie, 11, 457–469. ZAVALA, C. & ARCURI, M. (2016): Intrabasinal and extrabasinal turbidites: Origin ...
    ... recon- struction of the hinterland area of the system which is also lacking at present. Although the framework of the Devonian/Carbonifer- ous flysch systems of SE Europe was developed and compared at regional scales (EBNER et al., 2008; VOZÁROVÁ et al., 2009), local studies in the Carpatho-Balkanides ...
    ... continental environments and deep-marine realms. Further studi es could provide more information on palaeoenvironmental condi- tions and sedimentary systems of the studied Kučaj-Zvonce flysch and similar depositional settings (see SREMAC, 2012; FAN & GONG, 2016). Contemporaneous equivalent formations ...

  • A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice

    Nikola Lilić, Ivan Obradović, Ranka Stanković (2002)
    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 ...
    ... Expert Systems, Design and Development (Macmillan Publishing Company, New York, 1994). 3. J. S. Kowalik (ed.), Coupling Symbolic and Numerical Computing in Expert Systems (North-Holland, Amsterdam, 1986). 4. N. Lilic, R. Stanković and I. Obradović, A hybrid system for mine ventilation systems planning ...
    ... interface forms for the ResNet software package. • VENTEX, the diagnostic expert system for the analysis of ventilation systems are developed for IBM PC and compatible computer systems. The object-oriented approach in system structuring and modeling1 was used as the strategy for defining the model of ...
    ... we have already mentioned, the outlined approach to mine ventilation planning and design served as the basis for the development of a hybrid system named INVENTS (INtegrated VENtilation System).4 Figure 2 illustrates the place of INVENTS has in our approach to mine ventilation planning and design where ...

  • A Variant of Sharma-Aroras Optimal Eighth-Order Family of Methods for Finding A Simple Root of Nonlinear Equation,

    Ćebić Dejan, Paunović Marija, Ralević Nebojša (2018)

  • Hydrodynamic model of the open-pit mine “Buvač” (Republic of Srpska)

    Polomčić Dušan, Bajić Dragoljub, Papić Petar, Stojković Jana (2013)

  • Effectiveness assessment of agricultural machinery based on fuzzy sets theory

    Miodragović Rajko, Tanasijević Miloš, Mileusnić Zoran, Jovančić Predrag (2012)

  • Risk assessment model of mining equipment failure based on fuzzy logic

    D. Petrović, Tanasijević Miloš, V. Milić, Lilić Nikola, Stojadinović Saša, Igor Svrkota (2014)

  • Machine Learning and Landslide Assessment in a GIS Environment

    Marjanović Miloš, Bajat Branislav, Abolmasov Biljana, Kovaćević Miloš (2018)

  • Hydrodynamic Model of The Open-Pit Mine “Buvač” (Republic of Srpska, Bosnia And Herzegovina)

    Bajić Dragoljub, Polomčić Dušan, Papić Petar, Stojković Jana (2011)

  • 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 ...
    raspoloživost, fazi teorija, AHP višekriterijumska analiza, eksperska ocena, buldozer
    ... Technical Systems of Maintenance Engineering Availability is calculated on the basis of the time state picture, in which times of operation alternate with times of failure. The time state picture, i.e., the time and maintenance time structure for analyzing the availability of technical systems is shown ...
    ... dependent on reliability. Generally, dependability as a measure of availability is only a standardized, all-in concept, which describes technical systems from the point of view of design, operation, and maintenance [11]. It is evident that the standard provides a descriptive and linguistic definition ...
    ... uncertainty, indefinitely, multiplicity, subjectivity and mutual over-lapping. Fuzzy logic is used as a mathematical and conceptual model y expert systems with hybrid data. Unlike the classic crisp logic, fuzzy values are defined with membership function to proper linguistic variables [3]. The max–min ...

  • Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

    Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić (2021)
    The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...
    геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти
    ... plants or through cogeneration systems) [1] and space heating and cooling (using the heat pumps) to direct use in a wide range of applications in areas such as balneotherapy [2,3], agriculture, industry, swimming pool heating, and in individual and district heating systems [4,5]. While harnessing geothermal ...
    ... plants or through cogeneration systems) [1] and space heating and cooling (using the heat pumps) to direct use in a wide range of applications in areas such as balneotherapy [2,3], agriculture, industry, swimming pool heating, and in individual and district heating systems [4,5]. While harnessing geothermal ...
    ... energy efficiency design strategies focused on a wide range of passive design measures that integrated the technology related to necessary active systems from the conceptual design phase. Water management in these facilities is very dependent on water composition, flow and temperature yet needs to be ...