Претрага
78 items
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Definisanje strukturnih odnosa primenom postupka horizontalni gradijent
Različiti postupci matematičkih transformacija se mogu primeniti na gravimetrijskim i magne tometrijskim podacima, kako bi se na istražnom terenu definisali strukturno-tektonski odnosi. U radu su prikazani rezultati dobijeni korišćenjem postupka horizontalni gradijent i ukupni horizontalni gradijent na gravimetrisjkim podacima. Navedeni postupci su pomogli da se detektuju kontakti sa velikim padnim uglom (vertikalni ili subvertikalni kontakti), koji se mogu interpretirati kao rasedi. Za test područije uzet je istražni prostor koji se nalazi na jugoistoku Srbije u okolini Vranjskog basena. Položaji ...Snežana Ignjatović, Ivana Vasiljević, Natalija Jovanović. "Definisanje strukturnih odnosa primenom postupka horizontalni gradijent" in Tehnika, Beograd : Savez inženjera i tehničara Srbije (2019). https://doi.org/10.5937/tehnika1905664I
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Математика 2
Драган Станков (2020)Драган Станков. Математика 2, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2020
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Збирка решених задатака из Mатематике I
Драган Станков (2016)Драган Станков. Збирка решених задатака из Mатематике I, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2016
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Laboratory testing of fly ash
Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffractionMiloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Laboratory testing of fly ash" in Tehnički vijesnik (2016). https://doi.org/10.17559/TV-20150317171035
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Using gravity data to define structural correlation affecting the formation of Neogene basins
A gravity survey can help to define the structural correlation in the study area. The structures that have influenced the development of Neogene basins can be defined using gravity data. By applying mathematical transformations to gravity data, the geological structures (faults, nappes, etc.) that impacted the formation of Neogene basins can be defined. We have taken the part of the Dinarides as the test region. The paper presents the results obtained using the procedure residual, vertical gradient, and total ...Snežana Ignjatović, Ivana Vasiljević, Branisav Sretković, Milanka Negovanović. "Using gravity data to define structural correlation affecting the formation of Neogene basins" in The 54th International October Conference on Mining and Metallurgy, Bor Lake, Serbia, 18-21 October 2023, Bor : University of Belgrade, Technical Faculty in Bor (2023)
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Uticaj klimatskih promena na vodne resurse: primer sliv reke Mlave
Vesna Ristić Vakanjac, Saša Milanović, Ljiljana Vasić, Boris Vakanjac, Saša Bakrač, Radoje Banković, Veljko Marinović (2023)Na teritoriji Jugositočne Evrope, pa samim tim i u delu gde živimo (Republika Srbija i Republika Bosna i Hercegovina) za očekivati je da dođe do značajnijeg porasta temperature vazduha u značajnijoj meri, što će imati značajnijeg uticaja na padavine, njihovu unutargodišnju raspodelu, kao i pojavu sve više prisutnih ekstremnih vrednosti (izuzetno sušnih i kišnih godina). Sve ovo će uticati i na sam režim površinskih i podzemnih voda, resursa bez kojih život na ovoj planeti ne bi ni postojao. Da ...Vesna Ristić Vakanjac, Saša Milanović, Ljiljana Vasić, Boris Vakanjac, Saša Bakrač, Radoje Banković, Veljko Marinović. "Uticaj klimatskih promena na vodne resurse: primer sliv reke Mlave" in Zbornik radova III Kongresa geologa Bosne i Hercegovine sa međunarodnim učešćem, Neum, 21-23.9.2023., Ilidža : Udruženje/udruga geologa u Bosni i Hercegovini (2023)
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Spatial and temporal variability of precipitation in Serbia for the period 1961-2020
Boško Milanović, Phillip Schuster, Milan Radovanović, Vesna Ristić Vakanjac, Shristoph Schneider (2017)У овом раду анализиране су месечне, сезонске и годишње суме падавина у Србији за период 1961–2010. Географска ширина, дужина и надморска висина 421 падавинске станице и карактеристике терена у њиховом блиском окружењу (нагиб и аспект терена у радијусу од 10 км око станице) коришћене су за развој регресионог модела на основу којег је прорачуната просторна расподела падавина. Приказан је просторни распоред годишњих, јунских (максималне вредности за скоро све станице) и фебруарских (минималне вредности за скоро све станице) падавина. Годишње ...Boško Milanović, Phillip Schuster, Milan Radovanović, Vesna Ristić Vakanjac, Shristoph Schneider. "Spatial and temporal variability of precipitation in Serbia for the period 1961-2020" in Theoretical and Applied Climatology (2017). https://doi.org/10.1007/s0070-017-2118-5
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Testing the energy value of different types of coal by the method of active thermography
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 ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Testing the energy value of different types of coal by the method of active thermography" in 9th International Scientific Conference on Defensive Technologies, Belgrade, Serbia, 15-16 October 2020, The Military Technical Institute (2020)
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Parallel Bidirectionally Pretrained Taggers as Feature Generators
In a setting where multiple automatic annotation approaches coexist and advance separately but none completely solve a specific problem, the key might be in their combination and integration. This paper outlines a scalable architecture for Part-of-Speech tagging using multiple standalone annotation systems as feature generators for a stacked classifier. It also explores automatic resource expansion via dataset augmentation and bidirectional training in order to increase the number of taggers and to maximize the impact of the composite system, which ...Ranka Stanković, Mihailo Škorić, Branislava Šandrih Todorović. "Parallel Bidirectionally Pretrained Taggers as Feature Generators" in Applied Sciences, MDPI AG (2022). https://doi.org/10.3390/app12105028
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Distant Reading in Digital Humanities: Case Study on the Serbian Part of the ELTeC Collection
Ranka Stanković, Cvetana Krstev, Branislava Šandrih Todorović, Duško Vitas, Mihailo Škorić, Milica Ikonić Nešić (2022)In this paper we present the Serbian part of the ELTeC multilingual corpus of novels written in the time period 1840-1920. The corpus is being built in order to test various distant reading methods and tools with the aim of re-thinking the European literary history. We present the various steps that led to the production of the Serbian sub-collection: the novel selection and retrieval, text preparation, structural annotation, POS-tagging, lemmatization and named entity recognition. The Serbian sub-collection was published ...Ranka Stanković, Cvetana Krstev, Branislava Šandrih Todorović, Duško Vitas, Mihailo Škorić, Milica Ikonić Nešić. "Distant Reading in Digital Humanities: Case Study on the Serbian Part of the ELTeC Collection" in Proceedings of the Language Resources and Evaluation Conference, June 2022, Marseille, France, European Language Resources Association (2022)
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Specific electrical conductivity in epikarst groundwater of the eastern Suva Planina mt.
Branislav Petrović (2022)The epikarst is a part of the karst outcrop that is located within the unsaturated zone and represents a complex point of contact and mixing of unconsolidated material from the terrain surface. The correct and complete perception of epikarst, its degree of development and the presence on the limestone terrain can be achieved with a multidisciplinary approach. The study area for the applied multidisciplinary research was the Eastern part of karst massif Suva Planina Mt. One important part of ...Branislav Petrović. "Specific electrical conductivity in epikarst groundwater of the eastern Suva Planina mt." in KARST 2022: "Importance, State of the Art, and Prospective of Utilization and Protection of Resources in Karst", Serbian Academy of Sciences and Arts (SASA) (2022)
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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
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Метода променљивих околина за решавање проблема p-центра са поузданом мрежом
У овом раду је разматран проблем p-центра са поузданом мрежом (енгл. Reliable p-center facility location problem - RpCFLP). Решавање проблема подразумева иницијално успостављање p ресурса и алокације корисника, као и накнадну реалокацију корисника у складу са новонасталим сценаријима који садрже информације о онеспособљеним ресурсима и осталим измењеним улазним подацима. За решавање посматраног проблема предложена је метахеуристика заснована на итеративној варијанти основне методе променљивих околина (енгл. Iterated basic variable neighborhood search - IBVNS). Резултати тестирања предложене метахеуристике указују на њену ...Јована Рађеновић, Стефан Мишковић, Оливера Станчић. "Метода променљивих околина за решавање проблема p-центра са поузданом мрежом" in 50. Међународни симпозијум о операционим истраживањима SYM-OP-IS, Тара, Србија, 18-21.9.2023, Београд : Медија центар „Одбрана” (2023)
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Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija
Srđan D. Kostić (2013-11-04)U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenjaSrđan D. Kostić. "Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-11-04)
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Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija
Srđan D. Kostić (2013-11-04)U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenjaSrđan D. Kostić. "Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-11-04)
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Correlability of Solar Wind with Seismic Events in the Balkan Peninsula Zone
The Solar Heliospheric Observatory (SOHO) satellite was launched on the 2nd of December 1995 at L1 Lagrange point (1.5×106 km from Earth) with the purpose of gathering data for helioseismology, remote sensing of the solar atmosphere, and solar wind in situ. The satellite was positioned into orbit in early 1996, with data acquisition expected to commence on January 20th. The correlation between increased values of solar wind parameters and earthquakes in the Balkan peninsula zone between 1996 and 2018 ...Filip Arnaut, Dejan Vučković, Ivana Vasiljević, Vesna Cvetkov. "Correlability of Solar Wind with Seismic Events in the Balkan Peninsula Zone" in Geološki anali Balkanskog poluostrva, Beograd : Univerzitet u Beogradu - Rudarsko geološki fakultet (2021). https://doi.org/10.2298/GABP211029008A
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The shear strength evaluation of rough and infilled joints and its indications for stability of rock cutting in schist rock mass
Construction of E75 highway section through Grdelica gorge was one of the most demanding projects realized in recent Serbian history. The alignment approximately 25 km long consists of several tens of bridges, two tunnels, three galleries and cuts with total length of 6 km. The alignment passes through highly anisotropic Palaeozoic schist rock formation of different weathering grades. This study focuses on shear strength properties of discontinuities, which are found to be the critical feature contributing to the occurrence ...Dušan Berisavljević, Zoran Berisavljević, Svetlana Melentijević. "The shear strength evaluation of rough and infilled joints and its indications for stability of rock cutting in schist rock mass" in Bulletin of engineering geology and the environment, Springer (2022). https://doi.org/10.1007/s10064-022-02580-8
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A Computer-Aided System for Design of Drainage Facilities in Surface Mining
Sistemi za odvodnjavanje u velikim površinskim kopovima su projektovani da ostvare tri osnovna cilja: održavanje radnih uslova suvim, stabilnim i bezbednim; smanjenje hidrostatskog pritiska i povećanje efektivnog naprezanja tla radi poboljšanja stabilnosti kosina; i obezbeđivanje radne površine. Ovo se može postići pomoću drenažnih objekata koji uključuju kanale, jame za sakupljanje vode i pumpne stanice. U radu se prikazuje razvoj kompjuterski potpomognutog sistema pod nazivom Devatering of Open Pit Mines (DEVOP), koji može pomoći projektantima površinskih kopova da reše probleme ...Vladislav Kecojević, Marek Mrugala, Radomir Simić, Ranka Stanković. "A Computer-Aided System for Design of Drainage Facilities in Surface Mining" in Mine Water and the Environment, Springer Nature Switzerland AG (2003). https://doi.org/10.1007/s10230-003-0015-x
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Analysis of the correlation between modified secondary and primary compression index on the example of old municipal waste in Serbia
The paper presents the results related to the determination of the index of primary and maximum and minimum indices of secondary compression, i.e. modified primary and secondary compression indices (Cc, Cc', C'min, C'max), obtained by laboratory testing of artificially prepared municipal waste samples (three series of 9 samples in total) in an oedometer apparatus with a diameter of 20 cm. Old municipal waste was used, which was taken from two landfills in Serbia, one that is ...municipal solid waste, secondary compression index, ratio of modified secondary and primary compression indexDragoslav Rakić, Irena Basarić Ikodinović, Jovana Janković, Tina Đurić. "Analysis of the correlation between modified secondary and primary compression index on the example of old municipal waste in Serbia " in 20th International Conference on Soil Mechanics and Geotechnical Engineering (ICSMGE), ICMS Australasia (2022)
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Pregled hidrogeoloških istraživanja novootkrivenih ležišta metaličnih mineralnih sirovina na prostoru Srbije
Nebojša Atanacković, Vladimir Živanović, Veselin Dragišić, Sava Magazinović, Jakov Andrijašević (2022)Rastuća potražnja za mineralnim sirovinama, zavisnost evropske industrije od njihovog uvoza, kao i otvaranje tržišta u zadnjih 20-ak godina bili su pokretač intenzivnih istraživanja ležišta mineralnih sirovina na području Srbije. Ova istraživanja za rezultat su imala otkriće važnih ležišta bora i litijuma „Jadar“ i „Valjevo“, sedimentnih ležišta zlata „Bigar i Korkan“ i bakra i zlata „Čukaru Peki“. Sastavni deo ovih aktivnosti, posebno u okviru značajnijih novootkrivenih metaličnih ležišta, bila je hidrogeološka karakterizacija ležišta i okolorudnih terena. U razmatranom periodu ...Nebojša Atanacković, Vladimir Živanović, Veselin Dragišić, Sava Magazinović, Jakov Andrijašević. "Pregled hidrogeoloških istraživanja novootkrivenih ležišta metaličnih mineralnih sirovina na prostoru Srbije" in Zbornik radova XVI srpskog Simpozijum o hidrogeologiji sa međunarodnim učešćem, Univerzitet u Beograd, Rudarsko-geološki fakultet (2022)