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Упит dcterms_subject_txt:Information Extraction

182 items

  • Flyrock Induced by Blasting in Surface Mining

    Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac (2022)
    Минирање представља и даље најефикаснији и најјефтинији начин експлоатације великих количина чврстих минералних сировина на површинским коповима. Енергија експлозије се користи за фрагментацију чврсте стенске масе до захтеване гранулације. Поред позитивних ефеката минирања, постоје и одређени нежељени ефекти сваког процеса минирања који се могу јавити, а то су: потреси тла, разлетање комада стене, ваздушни удари, отровни и загушљиви гасови и прашина. Разлетање комада стене је неконтролисано избацивање фрагмената одминиране стенске масе и представља један од главних извора материјалне ...
    разлетање, бушење, минирање, површинска експлоатација, безбедност, несрећа

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... and Deng, Z.G., 2002. Extraction of rare carth metals by liquid surfactant membranes containing: Cyanex 272 as a carrier. Mining and Metallurgical Engineering(China), 22(3), p.74-78. [201] Raji, M., Abolghasemi, H., Safdari, J. and Kargari, A., 2018. Selective extraction of dysprosium from acidic ...
    ... Purification Technology, 320, p.124132. [204] Juang, R.S., Chen, J.D. and Huan, H.C., 2000. Dispersion-free membrane extraction: case studies of metal ion and organic acid extraction. Jowrma! of u Membrane Science, 165(1), p.59-73. [205] James, M., Cassidy, D., Goossens, D.J. and Withers, R.L., ...
    ... Lima, J.L. and Zagatto, E.A., 2009. Liquid-liquid extraction in flow analysis: A critical review. Analytica chimica acta, 652(1-2), p.54- 65. [219] Janssen, C.H., Macias-Ruvalcaba, N.A., Aguilar-Martinez, M. and Kobrak, M.N., 2015. Metal extraction to ionic liquids: the relationship between structure ...

  • Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)

    Dušan Polomčić, Dragoljub Bajić, Jelena Zarić (2015)
    A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...
    Water supply, Aquifer, Flow, Groundwater regime, Numerical modeling, Particle tracking
    ... 217-229, 2015, DOI: http://dx.doi.org/10.13044/j.sdewes.2015.03.0017 ABSTRACT A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice ...
    ... contact between the river and the aquifer over the alluvial layers. The main types of aquifer drainage are: artificial drainage (through groundwater extraction) and leakage into overlying semi-permeable strata (given that the aquifer is confined), and from thereto the top aquifer. In lithological terms ...
    ... Year 2015 Volume 3, Issue 3, pp 217-229 222 cells size was refined to 12.5 m × 12.5 m in the area of interest, wherewell density and extraction rates were high (Figure 5). To illustrate the flow field discretization and the derived schematization of the geometric relationships between the ...

  • Hybrid Model for Optimisation of Waste Dump Design and Site Selection in Open Pit Mining

    Aleksandar Doderovic, Svetozar-Milan Doderovic, Sasa Stepanovic, Mirjana Bankovic, Dejan Stevanovic (2023)
    Waste management is an unavoidable technological operation in the process of raw material extraction. The main characteristic of this technological operation is the handling of large quantities of waste material, which can amount to several hundred million cubic metres. At the same time, this operation must comply with all administrative and environmental standards. Therefore, optimising waste rock management (particularly haulage and dumping) has the potential to significantly improve the overall value of the project. This paper presents a hybrid ...
    projektovanje odlagališta i izbor lokacije, hibridni model, optimizacija, genetski algoritam

  • Football terminology: compilation and transformation into OntoLex-Lemon resource

    Jelena Lazarević, Ranka Stanković, Mihailo Škorić, Biljana Rujević (2023)
    У овом раду представља се пројекат који је у развоју, креирање првог дигиталног фудбалског речника на српском језику, као и да демонстрација примене модела OntoLex и љегових модула. OntoLex-FrAC модул укључује информације о учесталости и примерима употребе екстрахованих из корпуса. У овом случају, креиран је корпус за специфичан домен под називом СрФудКо, који садржи чланке вести о фудбалу на српском језику. Вишечлани термини аутоматски су екстраховани из српског корпуса, а затим ручно евалуирани и класификовани као спортски или ...
    повезани отворени подаци, корпус, СрФудКо, OntoLex, OntoLex-FrAC

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... potential issues [13]. 35 5.1.1. RodStar Features RodStar retains the information you input when starting a new case from scratch. You can exit RodStar while entering: data for a new case, and it will save the information you've entered up to that point. This functionality also works if the program ...
    ... long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element ofthe system enables optimization, which entails benefits in the form of increased efficiency ...
    ... which will define differences in calculations between software for Sucker Rod pumps. KEYWORDS: sucker rod pump, fluid production, mechanical extraction methods,, Prospe, OROD, RODSTAR. CONTENTS 1 INTRODUCTION ......aa a ae a ee e e aaeaeaeaeaeaaaaaaaaeaitNkteet 5 2 SYSTEM FOR ROD PUMPING ...

  • Preparation of Multimedia Document “YU Rock Scene”

    Milena Obradović, Aleksandra Arsenijević, Mihailo Škorić (2017)
    SUMMARY: This study will present the preparation process of a multimedia document entitled YU ROCK SCENE in which participants were senior students of undergraduate studies of the Department of Library and Information Science at the University of Belgrade Faculty of Philology during the academic year 2014/2015, as a part of the subject Multimedia Documents. This study gives an overview of the historical development of rock and roll in the territory of the former Yugoslavia, rock scene in Yugoslav republics, ...
    multimedia document, library science, information science, rock and roll, music, Yugoslavia
    ... skills. On the other hand, the downside was the extent of the topic. Selection and organization of information represented a great challenge. We have invested effort to select the most important information and represent it in an understandable way. Good organization and team work skills were necessary ...
    ... to thank the following individuals and institutions for their support and cooperation, for allowing us to use the rich information resources and for sharing the significant information on the Yugoslav rock scene: Petar Ignjatović, Željko Radǐsić, Miroljub Stojanović, Ivan Velisavljević, Borislav ...
    ... multimedia document entitled “YU ROCK SCENE” in which participants were senior students of undergraduate studies of the De- partment of Library and Information Science at the University of Belgrade, Faculty of Philology during the academic year 2014/2015, as a part of the sub- ject Multimedia Documents. ...

  • Environmental flows and demands for sustainable water use in protected karst areas of the Western Balkans

    Zoran Stevanović, Aleksandra Maran Stevanović, Želimir Pekaš, Romeo Eftimi, Veljko Marinović (2021)
    Karst terrains cover some 30% of the Western Balkans, where rich karst aquifers represent the main source of potable water supply and ensure the development of local economies and tourism. In this “classical karst” region, there are also numerous sites or areas under different forms of protection—from those that are included in the UNESCO World Heritage list to natural monuments and landscapes that are protected by national legislation. In and around them are specific representatives of flora and fauna ...
    Karst, Zaštićena područja, Ekosistem, Ranjivost i održivost, Zapadni Balkan

  • Environmental flows and demands for sustainable water use in protected karst areas of the Western Balkans

    Zoran Stevanović, Aleksandra Maran Stevanović, Želimir Pekaš, Romeo Eftimi, Veljko Marinović (2022)
    Karst terrains cover some 30% of the Western Balkans, where rich karst aquifers represent the main source of potable water supply and ensure the development of local economies and tourism. In this “classical karst” region, there are also numerous sites or areas under different forms of protection—from those that are included in the UNESCO World Heritage list to natural monuments and landscapes that are protected by national legislation. In and around them are specific representatives of flora and fauna ...
    Karst, zaštićena područja, ekosistem, ranjivost i održivost, Zapadni Balkan

  • Анализа одрона у стенским косинама: савремени приступи

    Милош Марјановић (2023)
    У Србији и региону познате су бројне појаве одрона које су изазвале велике застоје саобраћаја, материјалне штете или чак имале фаталне исходе, па их је потребно непрестано пратити и изучавати. Mодeловањe одрона скопчано је са ниским нивоом поузданости, али савремене технологије омогућавају да сe такви изгледи донекле побољшају. Једна од технологија која чини искорак утом правцу јe LiDAR-ско скенирање, које обезбеђује детаљне топографске подлоге у виду облака тачака високе резолуције и тачности. Поступак анализе одрона може се свести на: ...
    одрони, осматрање, LiDAR, облак тачака, моделовање

  • Mine surveying works for the purpose of excavating the remaining reserves of bauxite in the deposit of “Podbracan”

    Aleksandar Milutinović, Aleksandar Ganić, Thamer Rayes Diyab, Rade Tokalić, Meri Ganić (2015)
    ... the progress of the project. 5. Mine surveying works Mining and surveying works are present at the pre-extraction and extrac- tion stage of the underground deposit mining project. Pre-extraction activity in view of mine surveying includes: - Analysis of the existing geometric base on the terrain ...
    ... of the stability; - Detailed scanning of the existing mine chambers. Figure 5 Parts of open pit benches in interaction with bench drifts The extraction activity in view of mine surveying includes: a priori accu- racy assessment of geometry elements for setting out the mine chambers designed ...
    ... and the setting and scanning of the as- built condition. 6. A priori accuracy assessment for setting out the mine chambers projected Within the extraction activities, and immediately before setting out the mine chambers projected, it is necessary to carry out the a priori accuracy assessment of the ...

  • 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
    ... digital objects (e.g. connect the original document and all its versions, whereby include information about versions and the information about latest change in them etc.); administrative – contain information on the rights of access to the digital object in accordance with copyright and intellectual ...
    ... METADATA The metadata are a core for the development of digital libraries, as the structured information that describes, explains, locates, or otherwise makes it easier to retrieve, use or manage an information resource. These data are the key to ensuring that resources will be secured and continue ...
    ... continue to be accessible into the future. Metadata is often called data about data or information about information.12 There are several different types of metadata: descriptive – that describes a resource purpose, such as discovery and identification of objects that includes basic elements: title, author ...

  • 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.
    corpus search, web service, Serbian lexical resources, query expansion
    ... http://termi.rgf.bg.ac.rs/ 10 http://rbi.nb.rs 106 Infotheca Vol. 19, No. 2, December 2019 Scientific paper tronic resource of information for Library and Information Science profes- sionals, for scientists and students, as well as for library users with different interests. 4 Vebran Web Services ...
    ... et al., 2018). The RudKor corpus originated from ROmeka@RGF digital library to enable various lin- guistic and terminological research, including extraction of terms and other tasks in the field of knowledge engineering (Утвић et al., 2018). The RudKor contains 344 different texts with a total size of ...
    ... Service . . . ”, pp. 99–118 Mining terminology is introduced in the system of Serbian Morphological Dictionaries (cf 3.1). In order to allow the extraction of specific concepts and relations between concepts by creating lexical masks, new semantic markers relevant to the field of mining have been integrated ...

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... wikipedia.org/wiki/Potassium_dicyanoaurate (accessed on 12 July 2020). Corsica Gold Extraction. Available online: https://books.gooogle.fr/books?id"RQdHAQAATLTAAJ&pg=PA?211& Ipg\=PA211&dq=Corsica+gold+extraction&source=blI&ots=P-dxNx74tA&sig=ACfU3U1qpKUHSVka-7\ Q0MwdQcUc9F1xtAQ&hl=fr&sa=X&ved=2 ...
    ... which makes these ceramics the oldest fiber-reinforced ceramic matrix composite. Residues indicate the use of this pottery as a crucible for gold extraction using cyanide. Keywords: asbestos; CMC; Corsica; fiber; pottery 1. Introduction The fracture of a ceramic gives rise to a brittle edge, and ...
    ... that of KAg(CN)> (2141 cm-!) [47-49]. KAu(CN):> and KAg(CN) are so-called cyanidation compounds which have been used in gold- and silver-plating/extraction since the 19th century [50]. This would indicate that asbestos-based pottery pieces have also been used as crucibles due to their good resistance ...

  • Serbian NER&Beyond: The Archaic and the Modern Intertwinned

    Branislava Šandrih Todorović, Cvetana Krstev, Ranka Stanković, Milica Ikonić Nešić (2021)
    U ovom radu predstavljamo srpski književni korpus koji se razvija pod okriljem COST Akcije „Distant Reading for European Literary History” CA16204. Koristeći ovaj korpus romana napisanih pre više od jednog veka, razvili smo i učinili javno dostupnim Sistem za prepoznavanje imenovanih entiteta (NER) obučen da prepozna 7 različitih tipova imenovanih entiteta, sa konvolucionom neuronskom mrežom (CNN), koja ima F1 rezultat od ≈91% na test skupu podataka. Ovaj model je dalje ocenjen na posebnom skupu podataka za evaluaciju. Završavamo poređenje ...
    ... the results were much poorer (on average P = 57.8%, R = 37.7% and F1 = 45.7%). 2NER&Beyond, http://nerbeyond.jerteh.rs/ 3ACE (Automatic Content Extraction) 2005 Multi- lingual Training Corpus, https://catalog.ldc.upenn. edu/LDC2006T06 SHINRA2020-ML shared-task (Sekine et al., 2020) targeted the c ...
    ... some new NE types like “products”, “event”, “position”, etc. Dekker et al. (2019) experimented with diffe- rent off-the-shelf NER tools for the extraction of social network graphs from classic and mo- dern English fiction novels. The authors wan- ted to find out to what extent are these tools suitable ...
    ... al. (2020) created a corpus consisting of news articles in French, which ser- ved as a dataset for training and evaluation of a NER and a relation extraction algorithms using spaCy. Modrzejewski et al. (2020) incorporated NER trained in spaCy into an English/German Machine Translation system, with the ...

  • A Mathematical Learning Environment Based on Serbian Language Resources

    Radojičić Marija, Obradović Ivan, Stanković Ranka, Utvić Miloć, Kaplar Sebastijan (2018)
    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 ...
    mathematical content, text processing, mathematical formulae
    ... used for semi-automatic extraction of MWEs 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 MWE candidates for termbases ...
    ... between tokens). Through CQP web users can both specify query patterns and get statistical information about corpus. Within preparation of the MLES corpus to each word within the corpus the following information is assigned, in the following order:  Word type (noun, verb, adjective, etc.) - POS ...
    ... precise queries.  When search results are concerned, annotation.  Compensates for the information lost during corpus preparation (removed figures, tables, footnotes, etc.), as well as information that lack due to insufficiently wide context in which the search results are presented. ...

  • Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking

    Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović (2024)
    Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...
    non-detonating, chemical mixture, rock breaking, borehole pressure

  • 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
    ... 6. Feature extraction from dynamometric cards Feature extraction from dynamometric cards is the process of identifying and extracting important information from cards that display pump performance. Dynamometric cards contain data on pump operation, and the goal of feature extraction is to isolate ...
    ... detect faults, enabling timely actions and optimizing pump operation. Through these techniques, feature extraction helps in transforming raw data from dynamometric cards into useful information that can be used to enhance the performance and reliability of pumps.Machine learning involves creating ...
    ... Hyperparameter tuning ... aaoaaaaaaaaaaaaaaaaaakaaaoi 49 6.3.5. Machine learning algorithms.........aaaaaaaaa a aanaaaaaaakaaaaoa 50 6.3.6. Feature extraction from dynamometric cardS......caaaaaaaaaaannnce 51 6.4. Methodology.a......aaaaaaaaa a naaaaaaaaaaaaaaaaaaaaeaatabaoa 56 6.5. Experiment impl ...

  • Keyword-Based Search on Bilingual Digital Libraries

    Ranka Stanković, Cvetana Krstev, Duško Vitas, Nikola Vulović, Olivera Kitanović (2017)
    This paper outlines the main features of Biblisha, a tool that offers various possibilities of enhancing queries submitted to large collections of aligned parallel text residing in bilingual digital library. Biblishsa supports keyword queries as an intuitive way of specifying information needs. The keyword queries initiated, in Serbian or English, can be expanded, both semantically, morphologically and in other language, using different supporting monolingual and bilingual resources. Terminological and lexical resources are of various types, such as wordnets, electronic ...

  • Пројекат ПРИЗМА: Карактеризација и технолошки поступци за рециклажу и поновну употребу флотацијске јаловине рудника „Рудник“

    Владимир Симић, Стефан Петровић, Филип Арнаут, Весна Цветков, Милена Костовић, Драган Радуловић, Јовица Стојановић, Владимир Јовановић, Дејан Тодоровић, Нина Николић, Јелена Сенћански, Грозданка Богдановић, Драгана Мариловић (2024)
    Prizma, REASONING, Rudnik, jalovina, Fond za nauku Republike Srbije