Претрага
1276 items
-
Efficiency and lifetime of medium voltage transformers
Snežana Aleksandrović, Vesna Damnjanović. "Efficiency and lifetime of medium voltage transformers" in XVI International Scientific – Professional Symposium, INFOTEH, Jahorina, 22. mart - 24. mart 2017., Istočno Sarajevo : Elektrotehnički fakultet, Univerzitet u Istočnom Sarajevu (2017)
-
Improving efficiency of thermal power plants through mine coal quality planning and control
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 ...Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja. "Improving efficiency of thermal power plants through mine coal quality planning and control" in Thermal Science, Vinča Institute of Nuclear Sciences (2018). https://doi.org/10.2298/TSCI170605209B
-
Estimating hydraulic parameters for the complex hydrodynamic models
Hydrodynamic models have usually been calibrated manually, by trial-and-error, with different values of hydraulic parameters and hydraulic characteristics of boundary conditions. This method of calibration and estimation of hydraulic parameters requires an extensive knowledge and experience of experts, but whether the resulting solution includes an optimal set of parameters still remains an open question. An optimization method founded upon the Gauss-Marquardt-Levenberg algorithm, along with PEST software based on that algorithm, introduces automation of model calibration with regularization, which substantially ...Dušan Polomčić, Dragoljub Bajić, Jelena Ratković, Bojan Hajdin. "Estimating hydraulic parameters for the complex hydrodynamic models" in Mining and Metallurgy Engineering Bor, Centre for Evaluation in Education and Science (CEON/CEES) (2018). https://doi.org/10.5937/mmeb1704029P
-
Vebran Web Services for Corpus Query Expansion
Ranka Stanković, Miloš Utvić (2020)U ovom radu se govori o razvoju veb usluga Vebran i njihovoj primeni u poboljšanju pretraživanja korpusa. Veb-servisi Vebran koriste se za konsultovanje spoljnih leksičkih izvora za srpski jezik (uglavnom elektronski morfološki rečnici i srpski Vordnet) i proširivanje korisničkih upita radi dobijanja relevantnijih rezultata iz srpskih korpusa.... (Paumier, 2016; Krstev, 2008); – Open Corpus Workbench (OCWB) (Evert and The OCWB Development Team, 2019) and web-based graphical user interface CQPweb (Hardie, 2012); – NoSketch Engine (Rychlý, 2007). Unitex7 is open source software for an analysis of textual data, corpus processor with user-friendly ...
... represents token values or XML tags; – if the table includes more columns then each column represents a spe- cific type of information (linguistic and non-linguistic) associated with a corresponding token. The names of corpus columns, also called positional attributes by OCWB and NoSketch Engine, are ...
... No. 2, December 2019 Scientific paper union of all word forms. Instead, the generated query uses positional at- tribute lemma and therefore a linguistic annotation provided by TreeTag- ger (last column of Table 2). An alternative would be to create a tempo- rary query with expanded syntax, that is ...Ranka Stanković, Miloš Utvić. "Vebran Web Services for Corpus Query Expansion" in Infotheca, Faculty of Philology, University of Belgrade (2020). https://doi.org/10.18485/infotheca.2019.19.2.5
-
Joint interpretation of paleomagnetic, structural and AMS results from the Vardar Zone of Serbia
Emo Marton, Marinko Toljić, Vesna Lesić, Vesna Cvetkov. "Joint interpretation of paleomagnetic, structural and AMS results from the Vardar Zone of Serbia" in 18th Meeting of the Central European Tectonic Studies Group (CETEG) & 25th Meeting of the Czech Tectonic Studies Group, 22-25th April, 2021, Terchová, Slovakia, Department of Geological Sciences, Masaryk University in cooperation with the Czech Geological Survey, IPE MU Brno and UK Praha (2021)
-
Increasing the Local Road Network Resilience from Natural Hazards in Municipalities in Serbia
Biljana Abolmasov, Miloš Marjanović, Ranka Stanković, Uroš Đurić, Nikola Vulović. "Increasing the Local Road Network Resilience from Natural Hazards in Municipalities in Serbia" in Progress in Landslide Research and Technology, Volume 3, Issue 1, Springer Cham. (2024). https://doi.org/https://doi.org/10.1007/978-3-031-55120-8_22
-
Reconstruction of the Tethys' waning in the Balkans: New insights from Upper Cretaceous igneous formations and zircon provenance data
... units in the Balkans, but are absent on the Europcan side. Qur zircon provenance data from Upper Cretaceous sediments in the Sava-Vardar Zone offer new insights into the closure of the Tethys in the Balkans. Our data from Upper Cretaceous formations in the Sava-Vardar suture zone demonstrate thc ...
... 2024-10-09 07:30:15 Reconstruction of the Tethys' waning in the Balkans: New insights from Upper Cretaceous igneous formations and zircon provenance data Dejan Prelević, Kristijan Sokol, Ana Mladenović, Violeta Gajić, Vladica Cvetković Дигитални репозиторијум Рударско-геолошког факултета Универзитета ...
... Београду [ДР РГФ] Reconstruction of the Tethys' waning in the Balkans: New insights from Upper Cretaceous igneous formations and zircon provenance data | Dejan Prelević, Kristijan Sokol, Ana Mladenović, Violeta Gajić, Vladica Cvetković | Fifth Congress of Geologists of the Republic of North Macedonia ...Dejan Prelević, Kristijan Sokol, Ana Mladenović, Violeta Gajić, Vladica Cvetković. "Reconstruction of the Tethys' waning in the Balkans: New insights from Upper Cretaceous igneous formations and zircon provenance data" in Fifth Congress of Geologists of the Republic of North Macedonia, Macedonian Geological Society (2024)
-
Development Of The Serbian Geological Resources Portal
... available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Introduction The Geological information system of Serbia (GeolISS) represents a repository for digital archiving, query, retrieving, analysis and visualization of geologi- cal data. The ...
... Planning (MEMSP). The main goal of the implementation of GeolISS is the integration of existing geologic archives, data from published maps on different scales, newly acquired field data, intranet and internet publishing (BLAGOJEVIĆ et al., 2008). GeolISS was implemented in ArcGIS 9.3.1 technology as ...
... GeolISS. This web component is constantly being developed. While systematizing data from different geological research funded by the MEMSP before entering them into the geological database, we realised that certain data, which by their content and structure did not cor- respond to the initial geological ...Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić. "Development Of The Serbian Geological Resources Portal" in Proceedings of the 17th Meeting of the Association of European Geological Societies, Belgrade, Serbia : The Serbian Geological Society (2011)
-
Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software
The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić. "Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software" in Podzemni radovi, Beograd : Rudarsko-geološki fakultet (2024)
-
Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement
Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić,. "Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement" in International scientific conference Challenges in Applied Geology and Geophysics: 100th Anniversary of Applied Geology at AGH University of Science and Technology, Book of abstracts, Kraków, Poland, 10-13. Sep. 2019, Kraków, Poland : AGH University of Science and Technology (2019)
-
BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations
Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina. "BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations" in 17th International Conference of the open and underwater mining of minerals, Sts. Constantine and Helena Resort, Varna, 18-22 September, Bulgaria, Sofia, Bulgaria : Scientific and Technical Union of Mining, Geology and Metallurgy, (2023)
-
A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers
Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić. "A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers" in International Journal of Industrial Engineering: Theory, Applications and Practice (2019)
-
Reconstruction of the Tethys’ Waning in the Balkans
Dejan Prelević, Kristijan Sokol, Ana Mladenović, Violeta Gajić, Vladica Cvetković. "Reconstruction of the Tethys’ Waning in the Balkans" in 16th Alpine Workshop, European Geosciences Union (2024)
-
GIS Application Improvement with Multilingual Lexical and Terminological Resources
... archiving, query, retrieving, analysis and visualization of geological data, and allows users to create interactive queries, analyze spatial information, edit data and maps, and present the results of all these operations. Data modeling is inspired by different geological models (Richard, Matti ...
... observation relationships and metadata relationships. GeolISS data management tools are an extension of ArcGIS especially designed for data entry in the GeolISS database. They are implemented in MS Visual Studio 2005 and support data entry in both personal and enterprise geodatabases. They are ...
... which handles thematic non-spatial tables in SQL Server 2000. Each type of geological spatial data has an appropriate form for data management, with the possibility of adding various related data, such as geochemical and geophysical analysis, different types of measurements, stratigraphic age ...Ranka Stanković, Ivan Obradović, Olivera Kitanović. "GIS Application Improvement with Multilingual Lexical and Terminological Resources" in Proceedings of the 5th International Conference on Language Resources and Evaluation, LREC 2010, Valetta, Malta, May 2010, Valetta, Malta : European Language Resources Association (2010)
-
Komparativna analiza završnih kontura površinskog kopa Drmno
Definisanje optimalne završne konture površinskog kopa od suštinskog je značaja za ostvarivanje strateških ciljeva u razvoju rudarskih projekata. Savremeni programski paketi i metode za optimizaciju granica kopa, zasnivaju se na pronalasku završne konture koja obezbeđuje maksimalan profit. U slučaju površinskih kopova uglja, kod kojih osim profita postoji i čitav niz dodatnih kriterijuma i strateških ciljeva, princip optimizacije granica prema profitu, najčešće nije u potpunosti primenjiv. Iz rog razloga za uspešno definisanje granica površinskih kopova, neophodno je sagledati čitavu lepezu ...Dejan Stevanović, Dragan Ignjatović, Tomislav Šubaranović, Mirjana Banković, Petar Marković. "Komparativna analiza završnih kontura površinskog kopa Drmno" in XV Međunarodna konferencija OMC 2022, Zlatibor, 12-15. oktobar 2022., Jugoslovenski komitet za površinsku eksploataciju (2022)
-
New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"
Saša Ivanišević, Dejan Radivojević (2018)геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија... n of well‐log curves and the analysis of geological data from nine wells: KM‐117, 17, 1, 2, 3, 4, 5, 6 and 7 (Figure 1а and 1b). The principles of sequence stratigraphy have been applied in the analysis of geophy‐ sical and geological data, while the correlation of hydrocarbon reservoirs ...
... На основу интерпретације сеизмичких података реконструисана је трајекторија ивице шел‐ фа, на основу које није уочен значајан пад нивоа воде у језеру, тако да су пострифтни седименти депоновани у оквиру системског појаса високог нивоа воде (highstand systems tract – HST) и трансгресивног сис ...
... приказ индустријске корелације лежишта A, D, E, F и G и нове корелације у оквиру турбидита дна басена Мајдан формације. Хроностратиграфске границе дате су према традиционалној индустријској интерпретацији. Површина максималног плављења (MFS), формациона граница (FB), трансгресивна површина ...Saša Ivanišević, Dejan Radivojević. "New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)
-
A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals
This paper outlines the main features of Bibliša, a tool that offers various possibilities of enhancing queries submitted to large collections of TMX documents generated from aligned parallel articles residing in multilingual digital libraries of e-journals. The queries initiated by a simple or multiword keyword, in Serbian or English, can be expanded by Bibliša, both semantically and morphologically, using different supporting monolingual and multilingual resources, such as wordnets and electronic dictionaries. The tool operates within a complex system composed ...... eXchange) format. TMX is an open XML-based standard intended for easier exchange of translation memory data, that is, aligned parallel texts, between tools and translation vendors [TMX, 2005]. TMX uses ISO standards for country and language codes, as well as for date and time. A TMX document consists ...
... unstructured and semi-structured collections of data. This term generally refers to heterogeneous (different in format, standard and size, etc.) data, of a potentially variable structure, the content of which can grow exponentially. Manipulation of such data, which in general encompass documents, ...
... content, RSS feeds, e-mails, geospatial data, etc. asks for an approach that differs from data manipulation in classical relational databases. Development of XML databases was a natural response to 1710 exponential growth of interchange and storage of data in XML format. A database that manages ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Aleksandra Trtovac, Miloš Utvić. "A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals" in Proceedings of the 8th International Conference on Language Resources and Evaluation, LREC 2012, May 2012, Istanbul, Turkey, Istanbul, Turkey : European Language Resources Association (2012)
-
Towards translation of educational resources using GIZA++
... TraMOOC (Translation for Massive Open Online Courses) is a Horizon 2020 collaborative project aiming at providing reliable machine Translation for MOOCs. The main result of the project will be an online translation platform, which will utilize a wide set of linguistic infrastructure tools and resources ...
... the data for the translation system, we had to perform the following steps: tokenisation: This means that spaces have to be inserted between (e.g.) words and punctuation. truecasing: The initial words in each sentence are converted to their most probable casing. This helps reduce data sparsity ...
... translation experts, domain experts and end users are also involved. Results are combined into a feedback vector and used to refine parallel data and retrain translation models towards a more accurate second-phase translation output. The project results will be showcased and tested on the Iversity ...Ivan Obradović, Dalibor Vorkapić, Ranka Stanković, Nikola Vulović, Miladin Kotorčević. "Towards translation of educational resources using GIZA++" in The Seventh International Conference on e-Learning (eLearning-2016), September 2016, Belgrade : Metropolitan Univesity (2016)
-
Optimizacija površinskog kopa Ciganuša – Škorac
Vasilije Zejak (2024)U radu se govori o značaju optimizacije u savremenom rudarstvu i kako nam to softveri štede vreme, novac i olakšavaju procese planiranja.Konkretno u izradi ovog rada korišćen je softverski paket Whittle.Da bi se optimizacije mogla uspešno sprovesti, potrebno je konstruisati pre svega blok model ležišta kao i definisati niz tehno – ekonomskih parametara. Na osnovu tih podataka definiše se optimalna kontura i dinamika razvoja radova. U skladu sa definisanim podaci i odgovarajućim podlogama definisana je optimalna kontura površinskog kopa Ciganuša ...optimizacija, površinski kop Ciganuša - Škorac, blok model, strateško planiranje, optimalna kontura, dinamika razvoja, fazni razvoj... konturu koja će dati maksimalan NPV. Metode je pogodna za rad jer eliminiše greške u proceni prilikom ručnog definisanja optimalne konture na svakom preseku, a i pogodna Je za programiranje i primenu u softverima. Međutim ima i dva velika ograničenja. Prvo ograničenje Je da može da radi sa kosinama ...
... izradu ovog master rada, dat Je poseban osvrt na optimizacioni pristup inkorporiran u ovaj programski paket. 48 Optimizacija površinskog kopa Ciganuša – Škorac Whittle postupak se zasniva na brzoj implementaciji uzastopnih primena algoritma Lerchsa-Grossmanna. Za dati set ulaznih parametara ...
... Korekcija optimalne konture praktično se izvodi iscrtavanjem krivih linija (etaža) na osnovu naznaka datih u optimalnoj konturi, odnosno preko formirane blokovske strukture (slika 3.26). Preporučljivo je da generišu konturne linije na polovini visine etaže (srednje linije etažnih kosina), jer se tako ...Vasilije Zejak. Optimizacija površinskog kopa Ciganuša – Škorac, 2024
-
Flyrock induced by blasting in surface mining
Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac (2022)Miniranje predstavlja i dalje najefikasniji i najjeftiniji način eksploatacije velikih količina čvrstih mineralnih sirovina na površinskim kopovima. Energija eksplozije se koristi za fragmentaciju čvrste stenske mase do zahtevane granulacije. Pored pozitivnih efekata miniranja, postoje i određeni neželjeni efekti svakog procesa miniranja koji se mogu javiti, a to su: potresi tla, razletanje komada stene, vazdušni udari, otrovni i zagušljivi gasovi i prašina. Razletanje komada stene je nekontrolisano izbacivanje fragmenata odminirane stenske mase i predstavlja jedan od glavnih izvora materijalne štete ...Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac. "Flyrock induced by blasting in surface mining" in Rudarski glasnik, Beograd : Rudarski institut (2022). https://doi.org/10.25075/BM.2022.05