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Упит dcterms_subject_txt:Inorganic Chemistry,General Chemistry

550 items

  • Keyword Extraction from Parallel Abstracts of Scientific Publications

    Slobodan Beliga, Olivera Kitanović, Ranka Stanković, Sanda Martinčić-Ipšić (2017)
    ... in different natural languages at the same time. One of the open research questions in the keyword extraction task is to develop a method that is general enough for keyword extraction in several lan- guages simultaneously. Therefore, we focus on a method that can be easily ported to a new language. The ...
    ... from the domain of geology and mining in the Serbian and English languages. We show that the selectivity-based keyword extraction (SBKE) method is general enough to be easily ported to another language – Serbian, because it requires only shallow linguistic preprocessing. Then we tested the applicability ...

  • A bilingual digital library for academic and entrepreneurial knowledge management

    Ranka Stanković, Cvetana Krstev, Biljana Lazić, Dalibor Vorkapić (2015)
    A generic knowledge management process of organization, storage and retrieval of knowledge can suitably be fitted in a digital library. In the digital and knowledge age digital libraries can be used in knowledge management to handle intellectual assets and support knowledge creation. A multilingual digital library either stores content in more than one language or provides multilingual query access to monolingual content. In Serbia 18 of 308 scientific journals regularly published are bi-lingual, with papers simultaneously being in English ...
    Knowledge management, Digital library, Multilingualism, Language Resources, Terminology
    ... publish research results bilingually in Serbian and English, so that the initial concept of a library of bilingual journals is extended to a more general collection of bilingual documents. All TEMPUS1 projects have an obligation to publish reports and results bilingually, including the BAEKTEL project2 ...
    ... Resources are used to enhance and refine users’ queries. The query expansion is supported by e-dictionaries (Serbian morphological e-dictionaries), general purpose semantic networks (English and Serbian WordNets) and domain terminological bases and ontologies. A Dictionary of Library and Information ...

  • Properties of fly ash and slag from the power plants

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...
    fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method
    ... of the Croatian Geological Survey and the Croatian Geological Society 1. INTRODUCTION Fly ash is the product of burning coal and arises from inorganic substances melting in the thermal power plants. The fly ash par- ticles have a spherical shape, dimensions of 0.074-0.005mm, are of low density ...
    ... (CaO) are only present in very small quantities. The main reason for the variability of the chemical composi- tion is the waste-rock presence of inorganic composition. Based on the chemical composition the module R is deter- mined, and is shown in Fig. 5. The R module is used for deter- mination of ...
    ... 1328-1 (2003): Unbound and hydraulically bound mixtures – Part 1: Test methods for laboratory reference density and water content – Introduction, general require- ments and sampling. KEZOVIĆ, M. (2011): Coal bearing in Kolubara Basin.– The Journal of the Public En- terprise Electric Power Industry ...

  • Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names

    Branislava Šandrih, Cvetana Krstev, Ranka Stanković (2019)
    In this paper we present a rule- and lexicon-based system for the recognition of Named Entities (NE) in Serbian news paper texts that was used to prepare a gold standard annotated with personal names. It was further used to prepare training sets for four different levels of annota tion, which were further used to train two Named Entity Recognition (NER) sys tems: Stanford and spaCy. All obtained models, together with a rule- and lexicon based system were evaluated on ...
    NER, Named Entity Recognition Systems, Serbian, Personal Names
    ... dictionaries of Serbian (Vitas and Krstev, 2012). E-dictionaries play an important role specifically in the recognition of name expressions, since, beside general lexica, they contain many proper names, both personal and geopolitical. The system is modular which means that steps can be omitted and can change ...
    ... Džim Jim Tamara Tamara role generalnog sekretara Secretary General Bana Ki Muna Ban Ki-moon Komesarka UN za ljudska prava UN Commissioner for Nejvi ...

  • 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

  • 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

  • Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm

    Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić (2021)
    Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...
    Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering
    ... infrasound and low frequency noise generated by wind turbines, the main effects of their impact on humans are physical symptoms, health effects in general and affective influence (mood). However, their literature analysis also showed the absence of any results from systematic and comprehensive clinical ...
    ... socio-economic aspects of development and to optimize the position of wind turbines in relation to the results obtained. Bearing in mind that the general approach to impact assessment in the SEA process in methodological terms is predominantly expert, qualitative and subjective, but also flex- ible ...
    ... 1: Calculation of the absorption of sound by the atmosphere; ISO 9613-2:1996 Acoustics—Attenuation of sound during propagation outdoors—Part 2: General method of calculation;In- ternational Organization for Standardization: Geneva, Switzerland, 1993. 60. Farboud, A.; Crunkhorn, R.; Trinidade, A ...

  • Towards Sustainable Management of Transboundary Hungarian-Serbian Aquifer

    Zoran Stevanović, Peter Kozák, Milojko Lazić, Janos Szanyi, Dušan Polomčić, Balazs Kovács, Jozsef Török, Saša Milanović, Bojan Hajdin, Petar Papić (2011)
    ... czoooo r000 0 *1000 *2000 r c -3000 o 9 -+ooo !) E -5000 -6000 -7000 -8000 *"l,o,Tio 75oooo Figure 4.9.2 Three-dimensional model and general cross section through the study area between Danube (Duna, in ihe west) and Tisa River (Tisza in the east). Note: 'Pannonian'layers are considered ...

  • 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
    ... with a few concluding remarks. 2. Hybrid intelligent systems The motivation for coupling one or more AI methods into a hybrid system is, in general, one of the following [6]: 1) Function-replacing - enhancing one AI method by means of another in order to overcome the limitations of the former; ...

  • Using Metadata For Content Indexing Within An OER Network

    Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)
    ... educational metadata specification[10].The standard groups data elements to describe a learning resource into the following nine categories: general, lifecycle, meta-metadata, technical, educational, rights, relation, annotation and classification. LOM Standard has more than 70 possible elements ...
    ... facilitates exchange with other OER systems. Figure 2 provides an overview of the elements included in BMP. Figure2: Metadata model for BAEKTEL portal General data are taken from the DC standard. They are: title, creator, description, language of the content of the resource, date when the resource was ...

  • Digital Library From A Domain Of Criminalistics As A Foundation For A Forensic Text Analysis

    Dalibor Vorkapić, Aleksandra Tomašević, Miljana Mladenović, Ranka Stanković, Nikola Vulović (2017)
    U ovom radu predstavljen je model koji omogućava prikupljanje, pripremu, opis metapodataka, upravljanje i eksploataciju, uključujući pretragu punog teksta dokumenata iz domena kriminalistike napisanih na srpskom jeziku. Predloženi pristup primenjuje se na veb portalu koji sakuplja različite tekstove nastale iz časopisa Akademije za kriminalistiku i policijske studije, Krivičnog zakona Srbije, konferencija „Tara“ i „Reiss“, kao i iz nekih doktorskih disertacija vezanih za ovu oblast istraživanje. Nakon obrade teksta, korpus koji sadrži preko 5500 stranica običnog teksta, kreiran je i ...
    Omeka, Wordnet, pretraga punog teksta, morfološka i semantička pretraga teksta, proširenje upita
    ... standards for description and organization of digital resources as important aspects of scholarly work in the classroom settings but often overlooked in general blogging platforms. 1 dalibor.vorkapic@rgf.bg.ac.rs 2 https://omeka.org/ For the digital library presented in this paper, Omeka is installed ...
    ... management system is MySQL server, version 5 or later • It requires PHP version 5.3.2 or later The Omeka platform is published under GNU licence3 (General Public), while basic installation, documentation, plug-ins and best-practice examples are freely available at https://omeka.org. The customisation ...

  • Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation

    Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2023)
    The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...
    otpadne vode, toplotna pumpa, daljinsko grejanje, simulacija

  • Towards the semantic annotation of SR-ELEXIS corpus: Insights into Multiword Expressions and Named Entities

    Cvetana Krstev, Ranka Stanković, Aleksandra Marković, Teodora Mihajlov (2024)
    Овај рад представља активности на развоју корпуса ELEXIS-sr, српском додатку вишејезичном анотираном корпусу ELEXIS-а, који се састоји од семантичких анотација и репозиторија значења речи. ELEXIS је паралелни вишејезични анотирани корпус на десет европских језика, који може да се користи као вишејезички репер за евалуацију европских језика са мање и средње развијеним ресурсима. Фокус овог рада је на вишечланим изразима и именованим ентитетима, њиховом препознавању у скупу реченица ELEXIS-sr и поређењу са анотацијама на другим језицима. Разматрају се први кораци ...
    полилексемске језинице, именовани ентитет, вишезначност значења речи, складиште смисла, LLOD

  • Uticaj utiskivanja gas-lift gasa na prenos mase i toplote

    Branko Grubač (2019)
    Nakon uvođenja kontinualnog gas-lifta, primećen je porast proizvodnje tečnog naftnog gasa, TNG, u postrojenju za preradu gasa, kao jednog od finalnih proizvoda dobijenog iz fluida gaso kondenzatnih i rastvorenog gasa iz naftnih bušotina. Pretpostavljeno je da se prisustvom gas-lift gasa uspostavlja drugačija ravnoteža faza u odnosu na slučaj bez gaslifta, te da je gas-lift gas stripovao propan i butane iz tečne u parnu fazu, što je dovelo do povećanja prinosa TNG-a. Napravljen je model bušotine koja radi u kontinualnom gas-liftu ...
    gas-lift, modelovanje bušotine, prenos mase i toplote, taloženje parafina
    ... Engineering Science, Vol. 27, str 1197-1203, (1972) [35] D. Peng, D. Robinson, A new two-constant equation of state, Idustrial & Engineering Chemistry Fundamentals, Vol. 15, str 56-64, (1976) [36] T. Boldizsar, The distribution of temperature in flowing wells, Americal Journal of science, Vol ...
    ... 607-617, (1973) [73] A. Dukler, M. Hubbard, A model for gas-liquid slug flow in horizontal and near horizontal tubes, Industrial & Engineering Chemistry Fundamentals, Vol. 14, str 337-347, (1975) [74] D. Viswanath, Viscosity of liquids, Springer, (2006) [75] H. Zhang, Q. Wang, C. Sarica, J. Brill ...
    ... Ming, Q. Shujuan, L. Jianfeng, Z. Ling, Prediction model based on the theory for tackling wax deposition in oil pipelines, Journal of natural gas chemistry, Vol. 14, str 243-247, (2005) [97] M. Jorda, Paraffin deposition and prevention in oil wells, Society of Petroleum Engineers, SPE paper, str ...

  • 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
    ... can be represented by linking them together into a hierarchical structure. Thus the modified OOA model based on the strategy for evaluation of the general ventilation state of the mine could be easily mapped onto the appropriate elements of KAPPA-PC. The interface developed for VENTEX in KAPPA-PC fully ...

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)
    ... slope that can be handled by loaded mine truck in a safe way. Decline optimisation is concerned of determination of locations of SBP and UMCP. A general design optimisation problem is formulated as follows: Optimisation of underground mine decline ... ...

  • 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 ...
    ... can be represented by linking them together into a hierarchical structure. Thus the modified OOA model based on the strategy for evaluation of the general ventilation state of the mine could be easily mapped onto the appropriate elements of KAPPA-PC. The interface developed for VENTEX in KAPPA-PC fully ...

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... changes of these rat- ings, analysis is further extended by adding so called sensitivity coefficients for each of the conditioning parameters. The general framework of the method is presented in Fig. 1 and details are given in the following subsections. The procedure is quite different to the statistical ...
    ... problem, especially on re- gional scale landslide susceptibility and for models that should encompass different types of landslide mechanisms. In general, a more reliable connection between slope inclination and sliding processes can be found for rock fall and shallow landslides, while for deep seated ...
    ... sepa- rately according to the slope movement types (landslides, rock- falls, debris flows, etc). Since the presented approach is intended to give a general presentation of a region’s susceptibility, the in- terpolation technique is considered as very practical. In cases where detailed databases on the ...

  • 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
    ... state picture, i.e., the time and maintenance time structure for analyzing the availability of technical systems is shown in Figure 1, where, in general, t1 is uptime, and t2 is downtime. The time when the system is in its proper state can be divided into inactive time or the standby time (t11) and ...
    ... 0(6), . . . , 0(10)); ‘E’ = (1(1), 1(2), 0(3), . . . , 0(10)). Figure 3. Dependence of linguistic variables and membership function, the general form. Energies 2019, 12, 4044 6 of 18 For each partial indicator, a description of each linguistic variable is defined. The following descriptions ...
    ... Energies 2019, 12, 4044 13 of 18 (ii) In this case, it is possible to form: C = 103 = 1000 combinations. The combinations carry the code mark in the general record: jR-jM-jS, for j = 1 . . . 10. In this example, the following combinations are possible: 1-1-1; 1-1-2; 1-1-3; . . . ; 10-10-8; 10-10-9; 10-10-10 ...

  • An Integrated Environment for Management and Exploitation of Linguistic Resources

    Ranka Stanković, Ivan Obradović (2009)
    ... generate a complete compound lemma, based on the strategy. However, the strategy and the procedure are inde- pendent, and changes in the strategy, in general, do not af- fect the procedure itself. Thus experiments with various rule strategies were possible – the final strategy being the result of several ...
    ... user failed to use. However, the enlargement of the set of words that de- note a concept in a query, although contributing to the re- call in general, may also have an adverse effect. Namely, as a great number of words are polysemous, and a substantial homonymy of forms exists, the addition of ...