Претрага
426 items
-
A Mathematical Learning Environment Based on Serbian Language Resources
In recent years, in line with ever growing usage of Information technology, the learning environments are changing. The amount of available learning materials in various forms has increased. These new environments demand comprehensive learning systems, which enable management of the learning corpus with special attention paid to relevant lexical resources. In this paper we present the concept of a Mathematical Learning Environment in Serbian (MLES), which is based on a corpus of mathematical materials and various lexical resources, enabling ...... engineering problems. Figure 3. MLES application 3. GOALS AND CHALLENGES Searching and processing mathematical materials is a complex problem. Standard text processors cannot recognize mathematical texts in a proper way. There is thus a need for developing new and adapting existing processors ...
... Linguistics. 17 (3), pp. 380–409. [16] Stanković, R., Obradović, I., Utvić, M., (2014). Developing Termbases for Expert Terminology under the TBX Standard. Natural Language Processing for Serbian - Resources and Applications, University of Belgrade, Faculty of Mathematics pp. 12-26. ...Radojičić Marija, Obradović Ivan, Stanković Ranka, Utvić Miloć, Kaplar Sebastijan. "A Mathematical Learning Environment Based on Serbian Language Resources" in Proceedings of the 7th International Scientific Conference Technics and Informatics in Education, Faculty of Technical Sciences, Čačak (2018)
-
WS4LR - a Worksation for Lexical Resources
... correspondence between these units is established. The equivalent units are usually sentences, but the units can be larger, as well as smaller. The standard method for representing aligned texts is the Translation Memory eXchange format (TMX) that is XML-compliant 5 . The alignment itself can be performed ...
... appropriate finite state transducers usually produced by the graph management tool in Intex/Unitex environment. The produced graphs are in the form of standard textual files that can easily be generated or managed independently of these systems and their respective graph management tools. The same is true ...Cvetana Krstev, Ranka Stanković, Duško Vitas, Ivan Obradović. "WS4LR - a Worksation for Lexical Resources" in Proceedings of the Fifth Interantional Conference on Language Resources and Evaluation, Genoa, Italy, May 2006, ELRA - European Language Resources Association (2006)
-
Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty
... samples. Range implies difference between minimum and maximum. StDev, known as standard deviation, is expressed as a measure of the deviation of the mean value. CV – coefficient of variation is manifested as a ratio of standard deviation and mean value. These are some of the important statistical parameters ...Miloš Gligorić, Jelena Majstorović, Suzana Lutovac. "Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty" in Underground Mining Engineering, Belgrade : University of Belgrade - Faculty of Mining and Geology (2018). https://doi.org/10.5937/PodRad1832001G
-
Life Cycle Assessment of Individual Wood Biomass Heating Systems in Households
The use of solid fuels (wood biomass and coal) for heating of households continues to be common practice within European countries. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter. In this study, a life-cycle assessment (LCA) of firewood-based and pellet-based heating systems is performed. These two systems represent two different types of individual wood biomass heating systems. In the case of the firewood-based heating systems, it is analyzed a typical stove ...... for Standardization during the period 1997–2000, resulting in the standards ISO 14040, 14041, 14042, and 14043 [12]. In 2006, standard ISO 14040 was revised, and a new standard ISO 14044 was presented. Formal changes include the reduced number of standards, the reduced number of annexes, and the reduced ...Boban Pavlović, Dejan Ivezić, Marija Živković. "Life Cycle Assessment of Individual Wood Biomass Heating Systems in Households" in 5th International Scientific Conference ”Conference on Mechanical Engineering Technologies and Applications” COMETa2020, East Sarajevo, 2020, University of East Sarajevo, Faculty of Mechanical Engineering East Sarajevo (2020)
-
Истраживањe могућности коришћења нискотемпературних извора топлоте за одрживи развој енергетике градова
Miodrag M. Grujić (2014-06-04)Одрживост је континуиран процес балансирања између животне средине, економске исоцијалне димензије, који се односи на системска побољшања животног окружења.Енергија се налази међу покретачима одрживог развоја везано за потребу за повећањесоцијалног благостања, његову кључну улогу у економском развоју и утицај на животнусредину. Урбане зоне, као центри потреба за енергијом и емисија угљеника, пружајузначајне могућности за промоцију одрживости енергетског система заједнице.Планирање нових енергетских капацитета, у складу са принципима одрживог развоја,обухвата спровођење политике повећања енергетске ефикасности и увођења обновљивихизвора енергије. Дисертација ставља ...одрживи развој, даљинско грејање, модел, сценарио, вишекритеријумскаанализа, нискотемпературни извори, ELECTRE, Београд... за инвестиције. Оптимистичан сценарио предвиђа експанзиван развој привреде, енергетике, инфраструктуре и индустријске производње, уз повећање стандарда становништва. Песимистичан - Business as usual (BAU) сценарио предвиђа наставак актуелног стања. Ови сценарији узимају у обзир низ претпоставки ...
... кроз геотермалну енергију, представљена као развојно опредељење Града Београда. Генерални закључак је да развој економије, привреде и пораст стандарда становништва ствара потребне претпоставке за интензивну примену обновљивих извора енергије и високоефикасних технологија. Методолошки приступ ...
... The optimistic scenario foresees an expansive economic development, energy, infrastructure and industrial production and increasing the living standard. Pessimistic - business as usual (BAU) scenario foresees a continuation of the current situation. These scenarios take into account a number of ...Miodrag M. Grujić. "Истраживањe могућности коришћења нискотемпературних извора топлоте за одрживи развој енергетике градова" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-06-04)
-
Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm
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... turbine; 2. A 3D digital model of the planning area; 3. The international standard ISO 9613 [59], with input settings and settings specially adapted to the assessment of noise from wind farms. The ISO 9613 standard specifies an engineering method for calculating noise at a known distance from ...
... from a variety of sources under meteorological conditions favorable to sound propagation. The standard defines favorable conditions as downwind propagation where the wind blows from the source to the receiver within an angle of +/−45 degrees from a line connecting the source to the receiver and ...
... rs/sites/default/files/old-documents/Buka/Uredbe/uredba.pdf (accessed on 19 June 2021). 57. International Finance Corporation—WB Group, Performance Standard 1—Social and Environmental Assessment and Manage- ment Systems; Environmental, Health, and Safety (EHS) Guidelines, 1. Environmental—1.7 Noise (2007) ...Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić. "Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm" in Energies, MDPI AG (2021). https://doi.org/10.3390/en14196174
-
Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems
Dejan Ćebić, Nebojša M. Ralević (2021)Dejan Ćebić, Nebojša M. Ralević. "Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems" in Journal of Mathematical Chemistry, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10910-021-01253-3
-
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... methodology given in the European Standard EN 15316- 4-5 (Standard EN 15316-4-5 2017). System boundaries for determining the primary energy factor are presented in Fig. 2. Evaluation of the primary energy includes the complete supply chain of the fuel (Standard EN 15316-4-5 2017). Thus, the primary ...
... considerations in the performance of wastewater heat recovery systems. J Clean Prod 247:119583. https:// doi. org/ 10. 1016/j. jclep 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 ...Marija Živković, Dejan Ivezić. "Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability" in Clean Technologies and Environmental Policy, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10098-021-02063-6
-
Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species
Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić (2019)Herein we report effects of partial substitution of Fe3+ by Y3+ in magnetite (Fe3O4) on morphology and inorganic arsenic species adsorption efficiency of the Fe3−xYxO4 nanoparticles formed. The series of Fe3−xYxO4 (x=0.00, 0.042 and 0.084, labeled as Y00, Y05 and Y10, respectively) was synthesized using co-precipitation followed by microwave-hydrothermal treatment (MW) at 200°C. With increase of yttrium content(xvalue), both the morphological inhomogeneity of the samples and the fraction of spinel nanorods as compared to spinel pseudospherical particles increased. By ...Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić. "Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species" in Nanotechnology, IOP Publishing (2019). https://doi.org/10.1088/1361-6528/ab3ca2
-
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)... hidrauličnih bagera na površinskim kopovima. In Proceedings of the VIII Međunarodna Konferencija OMC 2018, Zlatibor, Serbia, 17–20 Ocotober 2018; Jugoslovenski Komitet za Površinsku Eksploataciju: Belgrade, Serbia, 2018; pp. 14–22, ISBN 978-86-83497-25-6. 11. Ristovic, I.; Ignjatovic, D. The Reliability ...
... na površinskim kopovima Elektroprivrede Srbije. In Proceedings of the VII Međunarodna konferencija Ugalj, Zlatibor, Serbia, 11–14 October 2017; Jugoslovenski Komitet za Površinsku Eksploataciju: Belgrade, Serbia, 2017; pp. 101–110, ISBN 978-86-83497-24-9. © 2019 by the authors. Licensee MDPI, Basel, ...Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović . "Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining" in Energies, MDPI (2019). https://doi.org/https://doi.org/10.3390/en12122245
-
Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog
Maja D. Milošević (2016-12-09)Adsorpciona efikasnost različitih uzoraka glina sa lokaliteta Srbije određenaje njihovim tretiranjem različitim koncentracijama rastvora metilen plavog (MP).Detaljna mineraloška karakterizacija ispitivanih glina i rezultati njihove interakcijesa rastvorima MP dobijeni su primenom optičkih, rendgenskih, hemijskih, DTA ispektroskopskih metoda.Na osnovu formiranja MP agregata u izmenljivim pozicijama i površiničestica gline, razlikuju se dva tipa glinovitih minerala: visoko naelektrisani(smektiti) i nisko naelektrisani (kaoliniti). Dimeri se stvaraju na naelektrisanimpovršinama, a granica njihovog razvoja omogućuje determinaciju mineralne vrste.Molekuli MP stoje pod uglom od 21.5o kada se ...minerali glina, metilen plavo, kristali metilen plavog, difuznarefleksija, adsorpcija, flokulacija, naelektrisanje slojeva... visokim pritiscima. Kao standardi za kalibraciju instrumenta korišćeni su multielementarni plasma standardizovani rastvori (Multi-Element Plasma Standard Solution 4, Specpure®, 1000 µg/ml; Titanium, plasma standard solution, Specpure®, Ti 1000µg/ml; Silicon, plasma standard solution, Specpure®, ...
... “ColorHexa” enciklopedije (http://www.colorhexa.com/) preračunate boje (RGB I HEXA standardi) upoređene su sa dominantnom talasnom dužinom (Dc) dobijenom na I. C. I. (x, y) dijagramu kao i sa Mansel (eng. Munsell) standardom za boje (Munsell, 1915; Milošević et al., 2016a). Određivanje boje izvršeno je ...
... upotrebi metilen plavog radi semi-kvantitativne procene KKI glinovitih minerala (procedura – ASTM C387-99 Standard Test For Methylene Blue Index of Clay). Merenja su izvršena po datom standardu u Laboratoriji za mineralogiju (Univerzitet u Beogradu - Rudarsko-geološki fakultet). Dodatna hemijska ...Maja D. Milošević. "Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-12-09)
-
E-Connecting Balkan Languages
In this paper we present a versatile language processing tool that can be successfully used for many Balkan languages. This tool relies for its work on several sophisticated textual and lexical resources that were developed for most of Balkan languages. These resources are based on several de facto standards in natural language processing.... four Balkan languages – Serbian, Bulgarian, Greek, Romanian. In the preparatory phase each translation was marked in accordance with the TEI-standard in XML, and the title (), paragraph () and segments (
) were included as units of text logical layout. At the beginning of the ...
... 140,000 synsets. Due to its remarkable size and successful inclusion in various computer-based applications it is considered as a de facto standard upon which wordnets for many other languages were built. One successful application of this concept was achieved by Balkanet project which was ...Cvetana Krstev, Ranka Stanković, Duško Vitas, Svetla Koeva. "E-Connecting Balkan Languages" in Proceedings of the Workshop Workshop on Multilingual resources, technologies and evaluation for Central and Eastern European Languages, 17 September 2009, eds. C. Vertan, S. Piperidis, E. Paskaleva and Milena Slavcheva, Borovets, Bulgaria : Association for Computational Linguistics Stroudsburg, PA, USA (2009)
-
Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)
Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović. "Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)" in Challenges : Sustainable Land Management – Climate Change, Advances in Geoecology 43, Catena Verlag GMBH (2014)
-
Linear-motor plunger pump increases lifting efficiency
Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev. "Linear-motor plunger pump increases lifting efficiency" in Oil & Gas Journal (2022)
-
Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду
... верзитету у Београду – Рударско- геолошком факултету. Научноистраживачки рад му је из области извозних постројења, диза- лица, мрежног планирања, менаџ- мента у индустрији минерала и области стандарда и законске регу- лативе. Остала релевантна искуства сти- цао је: International pedagogical semi- ...
... u funkciji optimalnog planiranja proizvodnje na rudnicima. Savetovanje IMES2000. Informatika, menadžment, ekologija i standardi, Aranđelovac, 10-12. maj 2000. godine. Jugoslovenski komitet za površinsku eksploataciju Saveza inženjera i tehničara Jugoslavije, s. 240–247. BLEČIĆ N., DRAŠKO Z., 2001: ...
... tipovima ležišta mineralnih sirovina. Zbornik radova, Savetovanje IMES ’03 (Informatika, menadžment, ekologija i standardi), Aranđelovac, 8-11. oktobar 2003., hotel Izvor, Jugoslovenski komitet za površinsku eksploataciju, Beograd. s. 141–147. Дипл. инж. МИЛЕНА ЈОСИПОВИЋ ПЕЈОВИЋ, стручни сарадник ...главни и одговорни уредник Душан Поломчић. Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2016
-
Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима
Radiša D. Đurić (2016-05-30)Оцена расположивости представља основну компоненту уинжењерском управљању опремом. Расположивост је свеобухватни концепткоји представља меру употребног квалитета техничких система, који садржичитаву серију парцијалних индикатора који се односе на време у раду ивреме у отказу система као и на његову функционалну погодност. Овадисертација даје структурну анализу парцијалних индикатора као и развојмодела њихове синтезе на ниво расположивости. Поменути подаци имајухибридни карактер (измерени и експертски добијени) и њихова интеграцијаи синтеза је остварена коришћењем фази пропозиције и фази закључивања.Овакав приступ омогућава оцену техничког система ...управљање опремом, инжењерство одржавања,расположивост, фази закључивање, прикупљање података, булдозер... одржавања IEC 300 – међународни стандард о управљању поузданошћу IEC 300-1 – међународни стандард о управљању сигурношћу функционисања IEC 300-2 – међународни стандард обезбеђења квалитета перформанси сигурности функционисања ISO 9000 – међународни стандард система управљања квалитетом E(t ...
... обезбеђена адекватна логистичка подршка. Овим питањима баве се стандарди серије IEC 300. Зато су они и постали жижа интересовања у правцу обезбеђења сигурности функционисања, а тиме и суштинска допуна серији већ довољно познатих стандарда ISO 9000, који се овим питањима на овакав начин не баве. Подизање ...
... производа [Тодоровић, 1993]. Слика 2.8. Шема стандарда IEC 300-1 Докторска дисертација 18 Озбиљност и комплексност елемената и задатака програма за обезбеђење квалитета перформанси сигурности функционисања, којима се посебно и детаљно бави стандард IEC 300-2, на недвосмислен начин се доказују ...Radiša D. Đurić. "Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-05-30)
-
Палеомагнетски резултати из Тимочког магматског комплекса, Источна Србија
... rea was involved in a large scale displacement during or after the time covered by the samples. METHODS The samples were cut into standard‐size specimens and the natural remanent magnetization (NRM) of each sample was measured. This was followed by stepwise demagnetization of ...Весна Лесић, Емо Мартон, Драган Лукић, Весна Цветков. "Палеомагнетски резултати из Тимочког магматског комплекса, Источна Србија" in Knjiga apstrakata 17. Kongres geologa Srbije, Vrnjačka Banja 17-20. maj 2018., Српско геолошко друштво (2018)
-
Production information system of the Pljevlja coal mine
Božo Kolonja, Ranka Stanković, Filip Vuković . "Production information system of the Pljevlja coal mine" in Mine Planning and Equipment Selection 2000, Routledge (2018). https://doi.org/10.1201/9780203747124-154
-
William „Strata” Smith, otac engleske geologije– 250 godina od rođenja
Dejan Radivojević (2019)... grofoviji Shrop videli polovinu kesona koji su služili kao rešenje za problem navodnjavanja. Kesoni su morali biti napravljeni po jako visokim standardima da bi izdržali vodeni pritisak, ali tokom jednog testiranja 1799. godine dogodio se incident u kome je umalo došlo do gušenja članova odbora koji ...Dejan Radivojević. "William „Strata” Smith, otac engleske geologije– 250 godina od rođenja" in Zbornik radova Srpskog geološkog društva, Srpsko geološko društvo (2019)
-
Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources
Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...... were compared with the initial retrieval system that was already in place. In general, a significant improvement has been achieved according to the standard information retrieval performance measures, where the InQuery method performed the best. Improving Document Retrieval in Large Domain Specific ...
... were compared with the initial retrieval system that was already in place. In general, a significant improvement has been achieved according to the standard information retrieval performance measures, where the InQuery method performed the best. 1 Introduction Advancements in database technology provide ...
... for a mineral resource type like copper, gold, coal, optionally at some location, or a geological event like landslide or earthquake. For evaluation standard measures were used, namely precision P = tp/(tp + fp), recall R = tp/(tp + fn), and F1-measure F = 2 · P · R/(P + R), where tp – true positive is ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources" in Trans. Computational Collective Intelligence - Lecture Notes in Computer Science 26, Springer (2017). https://doi.org/10.1007/978-3-319-59268-8_8