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Упит dcterms_subject_txt:the house of algebraic integer

2838 items

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.

  • Terminology Acquisition and Description Using Lexical Resources and Local Grammars

    Cvetana Krstev, Ranka Stanković, Ivan Obradović, Biljana Lazić (2015)
    Acquisition of new terminology from specific domains and its adequate description within terminological dictionaries is a complex task, especially for languages that are morphologically complex such as Serbian. In this paper we present an approach to solving this task semi-automatically on basis of lexical resources and local grammars developed for Serbian. Special attention is given to automatic inflectional class prediction for simple adjectives and nouns and the use of syntactic graphs for extraction of Multi-Word Unit (MWU) candidates for ...
    ... 5 However, 10 of them are used for the inflection of more than 98% of all nominal MWUs. Four of these classes are used for the inflection of two component MWUs, four for the inflection of 3-component MWUs and two for the inflection of 4-component MWUs. Given that 5 The number of FSTs (80) is greater ...
    ... technical characteristics of machines “Length of the caterpillar transporting device measured from the vertical excavator rotation axis to the front edge of the caterpillar”. 4.2 Extraction of MWUs from domain texts The extraction of MWUs from a text is preceded by the retrieval of new simple word terms ...
    ... preprocessing of the input plain text file from the chosen domain using Unitex. 2. Analysis of unrecognized words as the most probable source of terminology and expand- ing the dictionary of simple words: 2.1 Retrieval of unrecognized words; 2.2 Manual filtering, preparation of a list of extracted ...

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... both the current and withdrawn standard are correlative. The scope of application was evaluated by comparing the representative (mean) param- eters of the physico-mechanical properties to the prescribed technical requirements of the SRPS B.B3.200 (1994) standard, and the usability of the ore ...
    ... approximately 30 km from the town of Valjevo (Fig. 1). The area is part of the northern rim of the Maljen ophiolitic massif, located in the Western Belt of the Vardar Zone (Karamata and Krstić 1996; Karamata 2006). The wide territory is characterized by a complex morphology and is distinguished by ...
    ... presence makes the cutting of blocks difficult, reduces the useable percentage, and influences the final surface polishing. The homogeneity of colour in shades of light brown and preserved macrofossils contribute significantly to the aesthetic appearance and the decorative quality of the limestone ...

  • 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
    ... seams is about 6km2. The northern border is represented by outcropping and erosion of the Main coal seam. The western border of the deposit is a natural extension to the G field and the southern boundary to the E field. The eastern border is also marked by outcropping of the Main coal seam (ŽIVOTIĆ ...
    ... Properties of fly ash and slag from the power plants 319 on the edge of place Kostolac, while PPKO B is located on the northeastern part of the Kostolac coal basin near the village of Drmno (Fig. 1). The Kostolac coal basin, covering an area of 145km2, is lo- cated about 90km east of Belgrade. It ...
    ... projects. The chemical properties of fly ash and slag are the most important indicator in the evaluation of their suitability as a building material. Know- ledge of the material mineralogical composition is significant be- cause the type of minerals directly determines the properties of fly ash ...

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... its magnitude, being: the amount of explosive, the distance from the blast site, characteristics of the rock mass and the type of blasting, it is the equation of M. A. Sadovski that is used most commonly. In this paper, the law of Sadovsky is derived using the quotient of the relationship between ...
    ... distance and the oscillation velocity of the rock mass expressed in the obtained functions. Comparing values of the recorded oscillation velocities of the rock mass with the corresponding calculated ones, it can be seen that they are approximately the same. On the basis of obtained values of curveline ...
    ... effect of blasting, as well as to plan it, the determination of soil oscillation law is required, with the strike: mine field - facilities to be protected. One of the most commonly used equations is that of M. A. Sadovski defining the law of alteration in the oscillation velocity of the soil depending ...

  • Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif

    Ljiljana Vasić, Laszlo Palcsu, Huang Fen (2019)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry

  • Project REASONING: Characterization and technological procedures for recycling and reusing of the rudnik mine flotation tailings

    Vesna Cvetkov, Vladimir Simić, Stefan Petrović, Filip Arnaut, Milena Kostović, Dragan Radulović, Jovica Stojanović, Vladimir Jovanović, Dejan Todorović, Nina Nikolić, Jelena Senćanski, Grozdanka Bogdanović, Dragana Marilović (2024)

  • Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)

    Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović (2024)
    General Materials Science

  • Knowledge and Rule-Based Diacritic Restoration in Serbian

    Cvetana Krstev, Ranka Stanković, Duško Vitas (2018)
    In this paper we present a procedure for the restoration of diacritics in Serbian texts written using the degraded Latin alphabet. The procedure relies on the comprehensive lexical resources for Serbian: the morphological electronic dictionaries, the Corpus of Contemporary Serbian and local grammars. Dictionaries are used to identify possible candidates for the restoration, while the dataobtainedfromSrpKorandlocalgrammarsassistsinmakingadecisionbetween several candidates in cases of ambiguity. The evaluation results reveal that,dependingonthetext,accuracyrangesfrom95.03%to99.36%,whilethe precision (average 98.93%) is always higher than the recall (average 94.94%).
    diacritic restoration, morphological dictionary, corpus, word n-grams, local grammars
    ... RuThes-lite, thesauri there are four basic types of relationships between concepts. The first type of the relations is the class-subclass relationship, it has the properties of transitivity and inheritance. The second type of the RuThes relations is the part-whole relation. An important condition for ...
    ... concept frequency in the given document and the significance of the corresponding thematic node. Fig. 5 (in the center) demon- strate such thematic nodes for the above-mentioned document about the demographic threats. The important thematic node about the demographic situation includes the following concepts: ...
    ... accounts for the 4(https://www.rbc.ru/economics/17/11/2017/5a0eb1d39a79470f724250b4 Proceedings of CLIB 2018 99 significance of the corresponding thematic node and the frequency of the concept in the document. In the example text, the important threat ”population aging” was explicitly mentioned ...

  • Production of morphological dictionaries of multi-word units using a multipurpose tool

    Ranka Stanković, Ivan Obradović, Cvetana Krstev, Duško Vitas (2011)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multi-word units, noun phrases, query expansion
    ... <$3:Gen=m;Nb=s;Case=4> from the lower part of the graph means that the masculine gender, singular and accusative form of the third token — the noun zvezda — is needed. However, the gender of the noun zvezda is feminine, so this form cannot be produced and the lower paths in the graph will be ignored. ...
    ... for the third token. The occurrence of the same unification variables in the same path means that their values have to agree. If a pattern <$1:Case=$c> appears in the same path as <$3:Case=$c> it means that when the genitive form of the first token is generated then the genitive form of the third ...
    ... value from the third token zvezda and instantiates only to the value f — the feminine gender. The variable $g from the pattern <$1:Gen=$g> occurring in the same path will thus have to agree with it and take the same value. The two possible orders of the adjective and the noun in the MWU are achieved ...

  • 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

  • Mine ventilation system planning using genetic algorithms

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...
    coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methods

  • Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization

    Maja Todorović, Jana Štrbački, Marina Ćuk, Jakov Andrijašević, Jovana Šišović, Petar Papić (2016)

  • Groundwater resources for drinking water supply in Serbia´s Southeast Pannonian basin

    Dušan Polomčić, Bojan Hajdin, Marina Ćuk, Petar Papić, Zoran Stevanović (2014)
    menadžment podzemnih voda, monitoring, kvalitet podzemnih voda, bilans, baza podataka

  • Resource-based WordNet Augmentation and Enrichment

    Ranka Stanković, Miljana Mladenović, Ivan Obradović, Marko Vitas, Cvetana Krstev (2018)
    In this paper we present an approach to support production of synsets for SerbianWordNet(SerWN)byadjustingPrincetonWordNet(PWN)synsetsusing several bilingual English-Serbian resources. PWN synset definitions were automatically translated and post-edited, if needed, while candidate literals for Serbian synsets were obtained automatically from a list of translational equivalents compiled form bilingual resources. Preliminary results obtained from a setof1248selectedPWNsynsetsshowthattheproducedSerbiansynsetscontain 4024 literals, out of which 2278 were offered by the system we present in this paper, whereas experts added the remaining 1746. Approximately one half of ...
    WordNet, bilingual resources, term alignment, parallel lists
    ... final list of parallel terms are given in LiteralsEn, LiteralsSr. In the column Mark the expert marks if the offered literal is acceptable. The next column Frek shows the frequency of the candidate pair in the final list of parallel terms, whereas the resources in which the term pair was found are displayed ...
    ... replacement of XML by a relational database. The tool provides monitoring of relevant statistics, such as the total number of synsets, the number of semantic relations, quality and speed of enriching SerWN (statistics listed by days and by authors), etc. The current version of SerWN, thanks to the SWNE tool ...
    ... non-English wordnets are concerned, one of the common approaches to wordnet enhancement is the use of a developed wordnet (most commonly PWN) as the basic source for enrichment, and a method for aligning the synsets of the two wordnets, such as the ILI. Automatic alignment of synsets belonging to different ...

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... n with the European system of higher education and enhancement of academic mobility of teaching and non- teaching staff and students”. Finally, Article 32 stipulates that the “competent Ministry takes care of the harmonization of the educational system in the Republic with the trends of educational ...
    ... Bearing in mind the proximity of the languages used in the Western Balkans region, most of the educational materials that become available through this portal will be able to be used not only within the educational system of Serbia, but also within the educational systems of the region. 2 ...
    ... OERs in a cooperation of universities and industrial companies. Since his retirement at the University his is actively participating in the activities of the Language Resources and Technologies Society (JERTEH), of which he was one of the founders. He is the initiator of the Open Education Initiative ...

  • Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases

    Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić (2021)
    Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...
    Šifove baze, Lipofilnost, RP-TLC, Organski modifikatori

  • Surface functional groups and degree of carbonization of selected chars from different processes and feedstock

    Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)
    The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...
    Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS
    ... analysis Data for the mass fraction X of the main elements related to the mass of the incinerated char are given in Table 2. The concentrations of other elements are listed in Table 3. The sum parameters XcHNos (sum of the main elements), X.; (sum of other elements), X (sum of all analyzed elements) ...
    ... bonds at the freshly formed surfaces. Owing to the interference by the unidentified O1s signal, the results of the C1s signal seem to be more reli- able for the discrimination of C = O and C-O moieties. The fraction of C-O is higher than the fraction of C = O for all chars except AC1. The fraction ...
    ... degree of carbonization of selected chars main elements and of the sums of C, H, N, O, and S calculated from those values were in most cases lower than 1% with the largest error for the oxygen content and the sum of the main elements of PW700g with about 9% for Xo and 2% for XcHos. The sums for ...

  • Arsenic in tape waters of the south Pannonian basin (Serbia) and arsenic risk assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    ... 17]. In most of the affected areas, the sediment fraction is covered by a clay layer of varying thickness, which effectively prevents the ingress of oxygen into the aquifer. This, along with large amounts of organic substances deposited in the sediments, has resulted in the creation of a reducing medium ...
    ... supply wells within the territory of Vojvodina were used to perform arsenic con- centration analyses as part of studies conducted by the University of Belgrade, Faculty of Mining and Geology [20], “Geozavod” from Belgrade [21], as well as the Faculty of Natural Sciences of the University of Novi Sad [22]. ...
    ... over a length of some 600 km in an west-east direction, from the eastern edges of the Alps in Austria and Slovenia to the Carpathian Mountains in Romania. In the south, the basin is bordered by the North Dinarides in Croatia, Bosnia and Herzegovina, and Serbia, and in the north by the Tatras in Slovakia ...