Претрага

Упит dcterms_subject_txt:Geochemistry and Petrology

2421 items

  • Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications

    Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалима

  • Extreme Rainfall Event and Its Aftermath Analysis—IPL 210 Project Progress Report

    Biljana Abolmasov, Mileva Samardžić Petrović, Ranka Stanković, Miloš Marjanović, Jelka Krušić, Uroš Đurić (2021)
    Landslides, Extreme precipitation, Data analysis, IPL project report
    ... re- lating the landslide mechanisms and magnitudes versus the trigger and its aftermath, (4) locating spatial patterns and relationships between landslides and geological and envi- ronmental controls, (5) proposing an overview susceptibility map of the event and (6) landslides numerical modeling on ...
    ... such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher ...
    ... Valjevo cum Fig. 2 Cumulative and daily precipitation from MMS (April–May 2014); Western Serbia-Valjevo and Loznica MMS; Central Serbia-Kraljevo and Kragujevac MMS Table 1 Summary of landslides data from Western and Central Serbia according to the types of movement and types of material involved ...

  • Evaluating the deep learning software tools for large-scale enterprises using a novel TODIFFA-MCDM framework

    Zoran Gligorić, Ömer Faruk Görçün, Miloš Gligorić, Dragan Pamucar, Vladimir Simić, Hande Küçükönder (2024)
    duboko učenje, industrije velikih razmera, MAXC (maksimum kriterijuma), TODIFFA (totalni diferencijal alternative), izbor softvera za dubinsko učenje

  • Развој геолошког терминолошког речника ГеолИССТерм

    Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić (2011)

  • History of meteorite donations to the Collection of Minerals and Rocks of the University of Belgrade, Faculty of Mining and Geology (Serbia)

    Alena Zdravković, Maja Milošević, Kristina Šarić, Ivana Jelić, Ana Černok (2021)

  • OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian

    Ranka Stanković, Maxim Ionov, Medina Bajtarević, Lorena Ninčević (2024)
    Ovaj rad predstavlja novi jezički resurs za pretraživanje i istraživanje verbalnih aspektnih parova u BCS (bosanskom, hrvatskom i srpskom), kreiran korišćenjem principa Lingvističkih Povezanih Otvorenih Podataka (LLOD). Pošto ne postoji resurs koji bi pomogao učenicima bosanskog, hrvatskog i srpskog kao stranih jezika da prepoznaju aspekt glagola ili njegove parove, kreirali smo novi resurs koji će korisnicima pružiti informacije o aspektu, kao i link ka aspektnim parovima glagola. Ovaj resurs takođe sadrži spoljne linkove ka monolingvalnim rečnicima, Wordnetu i BabelNetu. ...
    aspekt glagola, lingvistički otvoreni podaci, BCS

  • 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

  • Topic Modeling of the SrpELTeC Corpus: A Comparison of NMF, LDA, and BERTopic

    Teodora Mihajlov, Milica Ikonić Nešić, Ranka Stanković, Olivera Kitanović (2024)
    Modeliranje tema je efikasan način da se dobije uvid u velike količine podataka. Neki od najčešće korišćenih metoda za modeliranje tema su Latentna Dirihleova alokacija (LDA) i faktorizacija nenegativne matrice (NMF). Međutim, sa porastom modela samopažnje i unapred obučenih jezičkih modela, pojavili su se novi načini za ekstrakcju tema. BERTopic predstavlja novi pristup modeliranju tema. U ovom radu smo uporedili performanse LDA, NMF i BERTopic na književnim tekstovima na srpskom, merenjem koherentnosti tema i raznovrsnosti tema, kao i kvalitativnom ...
    jezički modeli, LDA, modeliranje tema, BERT, BERTopic

  • 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
    ... 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 second part involves an analysis and calculations using the "RODSTAR", "QRod" and "Prosper" software, which ...
    ... including: maximum stress, the range of maximum and minimum stress, and the number of strokes per minute. All these factors affect material fatigue and the potential for rod failure,. In some cases, to reduce loads and investments in the lifting assembly and to increase the depth of the pump installation ...
    ... required power and capacity, and ensuring optimal system efficiency. It is also important to account for the specific characteristics ofthe reservoir and the challenges associated with equipment and system maintenance. Proper design can maximize the performance of sucker rod pump systems and reduce operational ...

  • SASA Dictionary as the Gold Standard for Good Dictionary Examples for Serbian

    Ranka Stanković, Branislava Šandrih, Rada Stijović, Cvetana Krstev, Duško Vitas, Aleksandra Marković (2019)
    У овом раду представљамо модел за избор добрих примера за речник српског језика и развој иницијалних компоненти модела. Метода која се користи заснива се на детаљној анализи различитих лексичких и синтактичких карактеристика у корпусу састављених од примера из пет дигитализованих свезака речника САНУ. Почетни скуп функција био је инспирисан сличним приступом и за друге језике. Дистрибуција карактеристика примера из овог корпуса упоређује се са карактеристиком дистрибуције узорака реченица ексцерпираних из корпуса који садрже различите текстове. Анализа је показала да ...
    Српски, добри примери из речника, аутоматизација израде речника, издвајање својстава, Машинско учење

  • In silico and in vitro biological evaluation: distribution of Ru(III) Schiff base complexes through the pancreatic 3D model and immersed blood vessel network

    Milica Međedović, Dušan Ćoćić, Aleksandar Mijatović, Vladimir Simić, Žiko Milanović, Marijana Kosanić, Nevena Petrović, Snežana Sretenović, Ana Rilak Simović (2024)
    Ru kompleksi, HAS, Bcl-2, antimikrobni
    ... Complexes 2 and 5 showed the highest cytotoxic effects toward human, A549 and murine LLC1 lung cancer cells. We described that these complexes altered the ratio of anti- and pro-apoptotic molecules and induced apoptosis of A549 cells. Additionally, 2 and 5 reduced the percentage of McI1 and Bcl2 expressing ...
    ... including biological, clinical, analytical and industrial in addition to their important roles in catalysis and organic synthesis [4-8]. These compounds have been used as drugs and possess a variety of antimicrobial activities against bacteria and fungi and anticancer activities against certain types ...
    ... the University of Kragujevac, and BiolRC (Bioengineering Research and Development Center, Kragujevac, Serbia). Regarding the graphical repre- sentation, the CAD Field & Solid is the University of Kragujevac and BiolRC's in-house pre- and post-processing 3D modeling and visualization tool. The main ...

  • Approach to operational mine planning: Case study Tamnava West

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Ranka Stanković (2014)

  • Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support

    Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović (2017)
    ... loading, and the like, which arc extremely pronounced in mining machinery. For monitoring purposes, measurement was undertaken in all three directions, upon overhaul and after 11,850 hours of opceration. Movement, speed and acceleration of oscillations werc plotted using: measured data and thc cffect ...
    ... stability problem, its basic definitions and the principles, important phenomena, rescarch motivations and applications in engineering. Luo and Tong [2] develop an efficient algorithm to find a moving is surface threshold lcvel for evolving the design boundary and updating the weighting factor. The ...
    ... under harmonic excitation and the results show that the method can successfully identify and locate the damage. Slopes of longitudinal vibration shapes are shown to be suitable for damage detection in bars and have potential for application in noisy environments. Zhu and He [5] propose a vibration-based ...

  • Phase relations and physical indicators of municipal waste from old landfills in Serbia

    Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić (2021)
    Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...
    municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science
    ... consistency, biodegradability etc. (Vosniakos and Patronic, 2009). Therefore, data on the composition, shape and size of n i Ra5 o — - particles in the landfill can be of great use in defining m:;';]on and selection || > M @523331 the phase composition and physical indicators of iušLte008| Y Horanalysis| ...
    ... G) m where: mx, mya — initial dry mass and mass of drained water Žuo, }a — Initial dry unit weight and dry unit weight in degradation stage no, n — initial porosity and porosity in a certain stage of degradation Wo, W — initial moisture and moisture content in a certain stage of degradation ...
    ... al Geotechnics Phase relations and physical indicators of municipal waste from old landfills in Serbia iii) ) Dragoslav Rakic ", Irena BasaricIkodinovic", Jovana Jankovic ' and Tina Djuric ” i) Associate Professor, University of Belgrade, Faculty of Mining and Geology, Djusina 7, Belgrade11000 ...

  • A contribution to the understanding of hydrochemical properties of thermomineral water on the L’dži locality (eastern part of North Macedonia)

    Hristina Petrova, Katarzyna Wątor, Piotr Rusiniak, Boris Vakanjac, Vesna Ristić Vakanjac, Ewa Kmiecik (2023)
    Regarding the aspect of mineral, thermo-mineral, and thermal waters, on the territory of the Republic of North Macedonia, there are 65 registered locations, of which 8 are categorized as spas. This includes the Kežovica spa, also known as the Štipska spa. In the vicinity of Kežovica Spa is the thermo-mineral L’Dži spring with mineralization around 1.3 g/L and the water temperature at the time of sampling was 50.1 °C. Spring L’Dži is generated by a fault structure and is ...
    termomineralne vode, hemizam voda, hidrohemijske karakteristike, lokalitet L’dži, Republika Severna Makedonija

  • The state and perspective of the natural gas sector in Serbia

    Dejan Ivezić, Marija Živković, Dušan Danilović, Aleksandar Madžarević, Miloš Tanasijević (2016)
    The strategy of long-term energy development of Serbia identifies an increase of share of natural gas in final energy consumption as one of the main aims. Serbia has signed a strategic agreement with the Russian Federation on cooperation in the oil and gas sector, within which the project South Stream pipeline is planned to be realized. In addition, the Republic of Serbia has signed the Treaty that establishes the Energy Community and accepted the obligation to implement the Energy ...
    Consumption, natural gas, scenarios of development
    ... three different scenarios (baseline, optimistic, and pessimistic), which have been selected, developed, and analyzed. Special attention was devoted to the possibility of using natural gas in electricity production and the harmonization of electricity and natural gas energy sector. 2. Indigenous production ...
    ... 2 million m3 is transit to Bosnia and Herzegovina), and with 90% availability, the current possible annual import is approximately 3.6 billion m3 (Ivezić et al., 2012). The distributive gas network includes pipelines of medium and low pressure, as well as metering and regulation stations. In the distribution ...
    ... increase the security and quality of supply, reduce transit costs, and enable systematic gasification in the central, eastern, and southern parts of Serbia (Government of the Republic of Serbia, 2008). The South Stream pipeline allows the possibility for the further development and construction of storage ...

  • The effect of finite driving rate on avalanche distributions

    Sonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević (2021)
    Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear Physics
    ... in (a), and for L = 512 with exponents τ ′ns = 2.40±0.04 and σns = 0.87±0.05; (c) τ ′ns = 4.30±0.15 and σns = 7.6±0.8. (d), (e) The variation of the exponents τ ′ns and σns, respectively, with the driving rate Ω for the integrated size distributions of nonspanning avalanches for L = 128, 256 and 512 as ...
    ... Zapperi S, Cizeau P, Durin G and Stanley H E 1998 Phys. Rev. B 58 6353 [13] Durin G and Zapperi S 2006 The Science of Hysteresis ed G Bertotti and I Mayergoyz vol 2 (New York: Academic) pp 181–267 [14] White R A and Dahmen K A 2003 Phys. Rev. Lett. 91 085702 [15] de Queiroz S L A and Bahiana M 2001 Phys. Rev ...
    ... Phys. 10 L257 [25] Parisi G and Sourlas N 1979 Phys. Rev. Lett. 43 744 [26] Bricmont J and Kupiainen A 1987 Phys. Rev. Lett. 59 1829 [27] Parisi G and Sourlas N 2002 Phys. Rev. Lett. 89 257204 [28] Tissier M and Tarjus G 2011 Phys. Rev. Lett. 107 041601 [29] Fytas N G and Mart́ın-Mayor V 2013 Phys. Rev ...

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)

  • Production information system of the Pljevlja coal mine

    Božo Kolonja, Ranka Stanković, Filip Vuković (2018)
    ... computer capability to people in a useful and simple manner. To make maximum use of computers within company structures and to produce cost effective management information systems, it is required to have input from both of the IS professionals and the end users, and the education of both. This is needed ...
    ... presented in Figure 3, logical and physical structure of the database was designed and implemented in MS Access-u. Figure 4 represents a pannel called »Relationships« which shows a rough structure of the database: tables with primary keys and attributes, and in addition, the relationships between ...
    ... of Reports and Statistics, which show separate, analytical, detailed data about every recorded events and summary, aggregated, synthetic data deduced from the previous. High-quality, clear and well-devised reports play an important role in the process of the production monitoring and should act ...

  • LRMI markup of OER content within the BAEKTEL project

    Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić (2015)