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Упит dcterms_subject_txt:CO2 technologies

242 items

  • Availability as a dimension of energy security in the Republic of Serbia

    Boban Pavlović, Dejan Ivezić (2016)
    There is a range of modern approaches and models in literature for the evaluation and determination of energy security, which are based on different parameters and indicators. For most of them, a common characteristic is emphasizing the avail ability of energy, as an important dimension for ensuring energy security. In this paper, concise overview of Serbian energy sectors is given and appropriate energy indicators are defined and determined. Selected indicators provide insight into the main components that characterize availability ...
    raspoloživost energije, energetski indikatori, energetska bezbednost
    ... Nowadays, energy security is also closely in- volved with other issues, such as security of infrastructure, equality of access to modern energy technologies, energy efficiency, and climate change mitigation [6]. The Asia Pacific Energy Research Centre (APERC) [7] defines energy security as the ability ...
    ... of RES using for electricity and heat production im- proves SOS decreasing the import dependency, with significant introduction of contemporary technologies and wider applications of different energy sources (biomass, biogas, solar, wind, geothermal). Diversification of energy imports is mainly connected ...

  • An Approach to Efficient Processing of Multi-Word Units

    Cvetana Krstev, Ivan Obradović, Ranka Stanković, Duško Vitas (2013)
    Efficient processing of Multi-Word Units in the course of development of morphological MWU dictionaries is not easy to achieve, especially when languages with complex morphological structures are concerned, such as Serbian. Manual development of this type of dictionaries is a tedious and extremely slow process. To alleviate this problem we turned to our multipurpose software tool, dubbed LeXimir, in the production of lemmas for e-dictionaries of multi-word units. In addition to that, we developed a procedure aimed at making ...
    Natural Language Processing, Grammatical Category, Lexical Representation, MWU, multi-word unit
    ... (2010) 8. Krstev, C., Stanković, R., Vitas, D., Koeva, S.: E-Connecting Balkan Languages. In: Proc. of the Workshop on Multilingual Resources, Technologies and Evaluation for Central and Eastern European Languages — RANLP09, pp. 23–29. Borovetz, Bulgaria (2009) 9. Krstev, C., Stanković, R., Vitas ...
    ... extraction and partial parsing. In: Proceedings of the Workshop on Balto-Slavonic Natural Language Processing: Information Extraction and En- abling Technologies, ACL ’07, pp. 1–10. Association for Computational Linguistics, Strouds- burg, PA, USA (2007). URL http://dl.acm.org/citation.cfm?id=1567545.1567547 ...
    ... (2000) 16. Savary, A.: Computational Inflection of Multi-Word Units — A Contrastive Study of Lexical Approaches. Linguistic Issues in Language Technologies 1(2) (2008) 17. Savary, A.: Multiflex: A Multilingual Finite-state Tool for Multi-Word Units. In: CIAA, pp. 237–240 (2009) 18. Savary, A., Krstev ...

  • 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
    ... content of input to the system of the ith energy carrier Kpi Primary CO2 emission coefficient of the ith energy carrier Utilizing sewage wastewater heat in district heating systems in Serbia: effects on… 1 3 K ext Primary CO2 emission coefficient of externally supplied heat K el Carbon dioxide ...
    ... content of the ith energy carrier input to heat producer, Kpi [ kg MWh ] Primary CO2 emission coefficient of the ith energy carrier, Q ext [MWh] Externally supplied heat, Kext [ kg MWh ] Primary CO2 emission coefficient of exter- nally supplied heat, Eel,aux[MWh] Auxiliary electricity ...
    ... for the biggest DH systems in Serbia City/municipality % of households connected to DH Primary factor Import depend- ency Shannon– Wiener index CO2 emission coefficient (kg/ MWh) Belgrade 49.03 1.51 80.99 0.31 316.77 Novi Sad 75.00 1.47 82.10 0.00 301.67 Kragujevac 33.00 1.72 18.44 0.56 532.38 ...

  • A Data Driven Approach for Raw Material Terminology

    Olivera Kitanović, Ranka Stanković, Aleksandra Tomašević, Mihailo Škorić, Ivan Babić, Ljiljana Kolonja (2021)
    The research presented in this paper aims at creating a bilingual (sr-en), easily searchable, hypertext, born-digital, corpus-based terminological database of raw material terminology for dictionary production. The approach is based on linking dictionaries related to the raw material domain, both digitally born and printed, into a lexicon structure, aligning terminology from different dictionaries as much as possible. This paper presents the main features of this approach, data used for compilation of the terminological database, the procedure by which it has ...
    sirovine, rudarstvo, terminologija, rečnik, terminološka aplikacija, mobilna aplikacija, digitizacija, leksički podaci, korpusi, otvoreni povezani podaci
    ... ontologies, thesauri and lexicons), including editing capabilities and managing SPARQL endpoint [60]. The system is able to interact with standard technologies in the RDF/Linked Data world, with the possibility to surf linked open data on the Web, access SPARQL endpoints, resolve RDF descriptions through ...
    ... systems with modular architecture, which includes medical term identification, retrieval of literature and ontology browsing by applying several NLP technologies. The similarity with our system is in combining several terminological and lexical resources, as well as the use of various NLP techniques, while ...
    ... for both building and using a terminology system that includes data, application and user interface layers covering different data and software technologies. The automation of data publishing in the form of linked data, as one of the core pillars of the Semantic Web or the Web of Data, provides links ...

  • The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers

    Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović (2019)
    One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...
    open-cast coal mine, auxiliary works, bulldozers, optimization, availability
    ... proven and quality machines with implemented unification as much as possible; Improvement of maintenance system; Implement modern and improved technologies in machine operation. Execution of these activities or just part of them will reduce the operational and maintenance costs, increase the volume ...

  • Energetska efikasnost elektromotora na površinskim kopovima

    Snežana Aleksandrović, Ilija Jeftenić (2023)

  • Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian

    Ranka Stanković, Branislava Šandrih, Cvetana Krstev, Miloš Utvić, Mihailo Škorić (2020)
    The training of new tagger models for Serbian is primarily motivated by the enhancement of the existing tagset with the grammatical category of a gender. The harmonization of resources that were manually annotated within different projects over a long period of time was an important task, enabled by the development of tools that support partial automation. The supporting tools take into account different taggers and tagsets. This paper focuses on TreeTagger and spaCy taggers, and the annotation schema alignment ...
    Part-of-Speech tagging, lemmatization, corpus, evaluation, Serbian, morphological dictionary
    ... different PoS-tags Figure 6: Results of PoS-tagging with TT11 tagger on different test sets and for different PoS-tags taggers as well as new tagging technologies will be taken into consideration and tested in order to find the best solu- tion for Serbian, a highly-inflected language without fixed word ...
    ... In Proceedings of the 2016 3962 Conference of the North American Chapter of the Associ- ation for Computational Linguistics: Human Language Technologies, pages 271–281. Constant, M., Krstev, C., and Vitas, D. (2018). Lexical analysis of serbian with conditional random fields and large-coverage ...

  • 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

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... HC—hydrocarbons; S3—amount of CO2 generated from oxygenated functional groups (mg CO2/g sample); Tmax—temperature corresponding to S2 peak maximum(◦C); TOC—total organic carbon (%, wt.); HI—hydrogen index = (S2 × 100)/TOC (mg HC/g TOC); OI—oxygen index = (S3 × 100)/TOC (mg CO2/g TOC); PI—production index ...
    ... minerals, which represent the main inorganic constituents of lignite [2]. Release of CO2 starts above 220 ◦C and can be attributed to decarboxylation reactions of lignite OM, which is rich in carboxylic groups, whereas CO2 formed at temper- atures >650 ◦C corresponds to degradation of carbonates. Release ...
    ... produced CO2 (peaks between 2300 cm−1 and 2400 cm−1 corresponding to C=O stretching) can be explained by the presence of minor amount of oxygen in initial HDPE [42], most probably originating from additives that are intercalated to improve the properties of HDPE [80]. Further re- action of released CO2 with ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods. Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability ...
    ... and make decisions based on data without being explicitly programmed for each scenario. Artificial intelligence encompasses a broader range of technologies that allow computers to perform tasks typically requiring human intelligence, such as speech recognition, visual perception, and decision-making ...
    ... operational efficiency by leveraging data and investing in new technology to increase productivity. The use of machine learning can help advance technologies and processes, especially in areas where traditional engineering methods have been ineffective. 6.3.1. Fundamentals of machine learning Machine ...

  • A Description of Morphological Features of Serbian: a Revision using Feature System Declaration

    Cvetana Krstev, Ranka Stanković, Vitas Duško (2010)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    Morphology, Lexicon, lexical database, Standards for LRs
    ... Savary, A. (2008). Computational Inflection of Multi-Word Units – A Contrastive Study of Lexical Approach, In: Linguistic Issues in Language Technologies, Vol. 1, No. 2, CSLI Publications. 819 ...

  • Formative evaluation of e-learning projects with the logical framework approach

    Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković (2015)
    ... d, educational-paradigm-oriented [15]. According to this last one perspective, E-Learning can be defined as "the use of new multimedia technologies and the Internet to improve the quality of learning by facilitating access to resources and services, as well as remote exchange and coll ...

  • Analiza uporednog praćenja temperature površine ohlađenih materijala pri njihovom zagrevanju do ambijentalne temperature

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Katarina Nestorović (2021)
    U datom eksperimentalnom radu su termografskim metodama ispitivane termofizičke karakteristike različitih materijala. Za ispitivanja su izabrani mesingani niovčić, ugalj i pelet, jer imaju različita termoizolaciona svojstava i različito stanje površine. Uzorci su najpre hlađeni, a zatim je njihovo zagrevanje na sobnoj temperaturi praćeno termalnom kamerom. U drugom delu eksperimenta, korišćena je impulsna termografija, a zagrevanje površine uzoraka vršeno je svetlosnom pobudom.
    termografija, impulsna termografija, nedestruktivno testiranje materijala, mesing, ugalj, pelet

  • Primena termografije u rudarstvu

    Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragan Ignjatović, Dragutin Jovković, Filip Miletić (2019)
    Danas, gotovo da nema oblasti u nauci i tehnici u kojoj se Infracrvena termografija ne primenjuje kao metoda za lociranje i praćenje zagrejanih objekata ili tela, beskontaktnu procenu temperature površina, i nedestruktivno ispitivanje materijala. U radu su prikazane mogućnosti i perspektive primene ove metode u oblasti rudarstva.
    infracrvena termografija, rudarstvo, monitoring
    ... spontaneuous combustion early detection. URL: https://www.imcontrol.com.au/white-papers/test-white-paper/ [13] Emitted Energy - Infrared Thermal Technologies: Thermal Process Monitoring Solutions. URL: https://www.emittedenergy.com/applications-by-process.html [14] Australasian Mine Safety Journal: ...

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

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

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... quality selection of the site for gasification. Regarding climate change and other environmental concerns, significant investments in clean coal technologies are evident in the world, with the alm of making rational use of this significant and relatively inexpensive energy source, while at the same ...
    ... Thermodynamics with Thermotechnics, Faculty of Tech- nology and Metallurgy, Belgrade, Serbia, 2004 10] Krejnin, E. V., Unconventional Thermal Technologies for the Extraction of Hard Fuels: Coal, Hydrocar- bon Raw Materials (in Russian), CRC Gazprom, Moscow, Russia, 2004 11| Petrović, D. et. al ...

  • Утечњени природни гас (УПГ) – технологија производње и регасификације

    Јована Милетић (2024)
    У овом раду истраживање је обухватило сагледавање карактеристика утечњеног природног гаса као извора енергије и његове улоге у савременој расподели потрошње енергије на глобалном и европском нивоу. Проучени су елементи тржишта утечњеног природног гаса, сектори коришћења, транс-портне руте и количине испорука. Сагледан је пут природног гаса од лежишта до корисника преко утечњавања и транспорта у резервоарима, са посебним акцентом на технологијама производње и регасификације. Објашњено је пречишћавање сировог природног гаса ради уласка у процес утечњавања, процеси утешњавања и настојања ...
    утечњени природни гас, технологија производње и рега- сификације, транспорт, директно коришћење УПГ-а, могућност коришћења УПГ-а у Србији
    ... KpeTaPba yreumpeHor rnpupojiHor raca (SETI Petroleum Equipment). 37 Cnuka 3.16 – YXmosapnu exaHusaw ca ueeua u 3ono0o6uwa (4dvanced EMC Technologies, 2016) HajnaxxHuju paaor 3a Kopumiheme yroBapHor MeXaHH3Ma Ca CHCTEMOM IHCBH je ReeroBa (DbJIČKCHOHJIHOCT KOJa J[O3BOJbaBa IIOMepaMbe Opojta ...
    ... trucks? — Facts, Trends, and Perspectives. Shell LNG Study. Hamburg: Shell Deutschland O:l. DOI: 10.13140/rg.2.2.31970.25289 Advanced EMC Technologies (2016). Cryogenic Seals for LNG Marine Loading Arms. SAD, Oklahoma. https://advanced-emc.com/cryogenic-seals-for-Ing-marine- loading-arms/ ...
    ... NG%20Value%20Chain.pdf pristupljeno 27.6.2024. Arab Oil Natural Gas, AONG Website. 4mine Gas treatment. https://www.arab-oil- naturalgas.com/the-technologies-of-natural-gas-sweetening/amine-gas-treatment/ pristupljeno 20.8.2024. Argonne National Laboratory. Case Sfudy – Liquified Natural Gas. SAD ...

  • An oilfield in Libya: A new model to enhance waste water disposal

    Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković (2016)
    нафта, лежишне воде, припрема

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)
    ... (GIS) is a system for capturing, storing, analyzing, managing and presenting spatially (georeferenced) data and related attributes. Modern GIS technologies are based on digital information, with various methods used for creating digital data. The most common method of data creation is digitization ...