Претрага
2944 items
-
Results of Recent Monitoring Activities on Landslide Umka, Belgrade, Serbia—IPL 181
Biljana Abolmasov, Uroš Đurić, Jovan Popović, Marko Pejić, Mileva Samardžić Petrović, Nenad Brodić (2021)... superficial displacement were plotted for all points and spatial distri- bution of displacement vectors are presented on Fig. 5. Maximal displacement rates were recorded in central and SW part of the landslide body (95.8–139.1 mm) close to local secondary scarps. Taking into account time span between ...
... March 2019 and both obtained DEMs were analyzed and compared (DEM2018 vs DEM2019). These two sets of UAV aerial images (2018 and 2019) of the Umka landslide were used for generating the orthophotos, which were subsequently pro- cessed and analysed. Automated measurement and extrac- tion of ground surface ...
... landslide surface. Results of all monitoring data were analysed according to the measur- ments period and accuracy of monitoring techniques. Data of climatological parameters and Sava River level are colected on daily basis from Hydrometerological Servise of Serbia from the begining of the monitoring project ...Biljana Abolmasov, Uroš Đurić, Jovan Popović, Marko Pejić, Mileva Samardžić Petrović, Nenad Brodić. "Results of Recent Monitoring Activities on Landslide Umka, Belgrade, Serbia—IPL 181" in Understanding and Reducing Landslide Disaster Risk. WLF 2020. ICL Contribution to Landslide Disaster Risk Reduction, Springer, Cham (2021). https://doi.org/10.1007/978-3-030-60196-6_14
-
Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)
Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD... Goldschmidt, V.M. Atlas Der Krystallformen: Plates and Text; Winter: Heidelberg, Germany, 1913; ISBN 9788578110796. 23. Nesbitt, H.W. Oxidation States and Speciation of Secondary Products on Pyrite and Arsenopyrite Reacted with Mine Waste Waters and Air. Mineral. Petrol. 1998, 62, 123-144. [CrossReft] ...
... diai and composition, i.e., As:S ratio, with a calculated As content close to its theoretical value of 33.3 at.% [14] (Figure 1c). Arsenopyrite from other investigated localities are close to the theoretical value, but they show compositional zonation and contain considerable amounts of trace ...
... n measurements, especially for fine-powdered samples with a large surface-to-volume ratio [28]. Assuming, the spherical shape of the particles and the observed speed of oxide formation, the detection limit of ~1% by volume criterion for a 5 nm thick surface oxide layer formed upon ~10 min air ...Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik. "Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)" in Crystals, MDPI AG (2023). https://doi.org/10.3390/cryst13020278
-
Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions
Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák (2015)A series of nanostructuredfluorite-type Ce1–xYxO2–δ (0rxr0.35) solid solutions, prepared via highenergy milling of the CeO2/Y2O3mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For thefirst time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1–xYxO2–δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria ...Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák. "Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions" in Journal of Solid State Chemistry, Elsevier BV (2015). https://doi.org/10.1016/j.jssc.2015.06.027
-
Mogućnost korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom
U narednom periodu se planira izgradnja nekoliko desetina sistema za prečišćavanje otpadnih voda u većim gradovima u Srbiji. Iskustva iz postrojenja koja su trenutno u radu, pokazuju da bi prečišćena otpadna voda, s obzirom na protok i temperaturu, mogla da predstavlja značajan izvor obnovljive energije. U radu su prikazani primeri dobre prakse korišćenja ove energije u sistemima daljinskog grejanja u zemljama Evropske unije. Analiziran je rad postrojenja za prečišćavanje otpadnih voda u Šapcu i razmotrena je mogućnost njegovog korišćenja ...... analysed and the possibility of its use in the local district heating system was considered. Index terms - heat pump, district heating systems, wastewater treatment plant I UVOD oplotna pumpa je uređaj je uređaj koji toplotu prenosi sa toplotnog rezervoara niže temperature (toplotni izvor) na ...
... available flow and temperature) could be a significant source of renewable energy. The paper presents examples of good practice in the use of this energy source by heat pumps in district heating systems in the EU countries. The operation of the wastewater treatment plant in the city of Šabac was analysed ...
... запослених доступним у слободном приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović. "Mogućnost korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom" in Energija, Ekonomija, Ekologija, University Library in Kragujevac (2021). https://doi.org/10.46793/EEE21-1.11I
-
A Lexical Approach to Acronyms and their Definitions
In this paper we present a comprehensive approach to acronyms for Natural-Language Processing (NLP) of Serbian texts. The proposed procedure includes extraction of acronyms and their definitions that are usual Multi-Word Units (MWUs), shallow parsing of MWUs that enables MWU lemmatization and production of entries in morphological electronic dictionaries, both for MWU and acronyms, that are provided with grammatical, syntactic, semantic and domain information. This approach enables representation that reflects complex relations between acronyms and their definitions.... Corpus of Contemporary Serbian3 that has more than 22 million simple word forms (more than one million sen- tences). This corpus contains 70% of newspaper texts (57% daily, 8% weekly and 5% monthly newspapers) and 6% of monographs and textbooks (Krstev and Vitas, 2005), which are types of texts that ...
... gender. 2. Description of Tasks and their Goals Work on acronyms in NLP domain focuses on some similar tasks. The first one is extraction of acronyms from corpora and detection of their variants. The second task is to detect acronym definitions and their variants in cor- pora and connect them with right ...
... Automatic construction of a morpho- logical dictionary of multi-word units. In IceTAL, vol- ume 6233 of LNCS. Springer. Krstev, C. and D. Vitas, 2005. Corpus and Lexicon – Mu- tual Incompletness. In Proc. of the Corpus Linguistics Conference, Birmingham. Liberman, Mark Y and Kenneth W Church, 1992 ...Cvetana Krstev, Duško Vitas, Ranka Stanković. "A Lexical Approach to Acronyms and their Definitions" in Proceedings of the 7th Language & Technology Conference, November 27-29, 2015, Poznań, Poland, Springer (2015)
-
The Usage of Various Lexical Resources and Tools to Improve the Performance of Web Search Engines
In this paper we present how resources and tools developed within the Human Language Technology Group at the University of Belgrade can be used for tuning queries before submitting them to a web search engine. We argue that the selection of words chosen for a query, which are of paramount importance for the quality of results obtained by the query, can be substantially improved by using various lexical resources, such as morphological dictionaries and wordnets. These dictionaries enable semantic ...LR web services, MultiWord Expressions & Collocations, Information Extraction, Information Retrieval... Balkanet project (Tufiş, 2004), and presently encompassing 14.593 synsets) and the Princeton wordnet which is publicly available are connected via the Interlingual index (ILI) (Vossen, 1998). 4. In a similar way queries can be expanded by Prolex, a multilingual database of proper names which represents ...
... inflection of the adjective beli ‘white’, one for inflection of the noun luk ‘onion’ and one for the compound as whole which takes care of agreement conditions. These transducers expand the query beli luk into beli luk AND belim lukom AND beli lukovi AND belih lukova AND belima lukovima AND belim ...
... belim lukovima AND bele lukove AND bela luka AND beloga luka AND belog luka AND belome luku AND belom luku Due to the third inflectional transducer this query expands into only 12 combinations of an adjective form and a noun form, instead of 216 possible combinations, thus disabling false ...Krstev Cvetana, Stanković Ranka, Vitas Duško, Obradović Ivan. "The Usage of Various Lexical Resources and Tools to Improve the Performance of Web Search Engines" in LREC 2008: Conference on Language Resources and Evaluation, Marrakesh, Morocco, May 2008, European Language Resources Association (ELRA) (2008)
-
Frequency and Length of Syllables in Serbian
Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová (2019)Basic analyses of several properties of syllables (the rank-frequency distribution, the distribution of length, and the relation between length and frequency) in Serbian is presented. The syllabification algorithm used combines the maximum onset principle and the sonority hierarchy. Results indicate that syllables behave similarly to words as far as mathematical models are concerned, but values of parameters in models for syllables are quite different from those for words.... framework of quantitative linguistics in several other papers. However, borders between syllables were determined either using language-specific rules (Obradović et al., 2010, for Serbian; Meštrović et al, 2015, for Croatian), or using the approach suggested by Pulgram (1970) and modified by Lehfeldt ...
... investigate many properties of syllables. In this paper we limit ourselves to analyses of three aspects: 1) the rank-frequency distribution, 2) the distribution of length, and 3) the relation between length and frequency. The goodness-of-fit of a model is evaluated in terms of the discrepancy coefficient ...
... lack of its precise definition8 (cf. also Crystal, 2008, pp. 467-468; 1 Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovića 6, 21101 Novi Sad, Serbia, and Faculty of Mining and Geology, University of Belgrade, Đušina ...Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová. "Frequency and Length of Syllables in Serbian" in Glottometrics (2019)
-
The effect of finite driving rate on avalanche distributions
Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear PhysicsSonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević. "The effect of finite driving rate on avalanche distributions" in Journal of Statistical Mechanics: Theory and Experiment, IOP Publishing (2021). https://doi.org/10.1088/1742-5468/ac1f12
-
Centar za hidrogeologiju karsta - 15 godina nauke i struke
... In more than 50 of his papers contributed authors from 30 different countries. The number of citations in April 2023 according to Google Scholar is 2668 (h- index 22), and after Research Gate 1675 (h-index 20). The monographs of renowned publishers are Groundwater Hydrology of Springs: Engineering ...
... promotion of our national school in hydrogeology and karst hydrogeology. This concept from the very first moment has been set as one of the main goals of the Centre's activities. The karst hydrogeology is closely linked to the name of Jovan Cvijić even though he has been primary considered as the ...
... monographs, of which 6 papers in Journals from the SCI list, with citations 36 times, h-index 3, and 110- index 1. He participated in numerous conferences and workshops in China, Spain, France, Austria, Bulgaria, Romania, Croatia, Bosnia and Herzegqovina. He has been awarded several times in the country ...urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović. Centar za hidrogeologiju karsta - 15 godina nauke i struke, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, Centar za hidrogeologiju karsta, 2023
-
Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)
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 ...... flow, as well as the goal of the task at hand, were of primary importance in selecting the mathematical model concept. A multi-layered model was developed. The hydrodynamic model represented the municipal groundwater source of Kikinda (the source at Šumice and the Jezero Well), but also the extended ...
... flow and based on the major hypotheses of this method (linear form of the sink term in the mass transfer equation and negligible order of magnitude of dispersion effects), the particle tracking method for the determination of the radius of influence of the groundwater source was used and presented ...
... 1Department of Hydrogeology, Faculty of Mining and Geology, University of Belgrade, Đušina 7, Belgrade, Serbia e-mail: dupol@gmail.com 2Department of Hydrogeology, Faculty of Mining and Geology, University of Belgrade, Đušina 7, Belgrade, Serbia e-mail: osljane@orion.rs 3Department of Hydrogeology ...Dušan Polomčić, Dragoljub Bajić, Jelena Zarić. "Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)" in Journal of Sustainable Development of Energy, Water and Environment Systems (2015). https://doi.org/10.13044/j.sdewes.2015.03.0017
-
Uticaj raspadanja na stabilnost kosina u mekoj stenskoj masi
Anđela Despotov (2024)U radu je opisano ponašanje mekih stenskih masa koje su izložene porecesu raspadanja tokom određenog vremenskog perioda. Meke stenske predstavljaju kritične vrste stenskih masa pošto izazivaju različite probleme tokom izvođenja građevinskih radova. Meke stene mogu biti sedimentne stene, raspadnute metamorfne i magmatske stene. Odlikuju se niskim vrednostima čvrstoće, visokom deformabilnošću, visokom plastičnošću, podložne su dezintegraciji i fizičko-hemijskom raspadanju, odnosno ubrzanom dejstvu površinskog raspadanja usled atmosferskih uticaja.Za klasifikaciju mekih stenskih masa koriste se modifikovane verzije već postojećih klasifikacionih sistema. Jedan ...... Institution of Mining and Metallurgy 527 p, London 19. ISO 14689:2017 Geotechnical investigation and testing - Identification, description and classification of rock 20. Sandeen, J., (2023), Mechanical Weathirng, CK-12 Foundation 21. Kanji, M., (2014), Journal of Rock Mechanics and Geotechnical ...
... , Pineda, J.A., (2006) Weathering and degradation of shales: experimental observations and models of degradation. VI South American Rock Mechanics Conference. Cartagena de Indias, Colombia 3. ASTM. (2008) Standard Test Method for Slake Durability of Shales and Similar Weak Rocks. ASTM designation ...
... 11. Vlastelica, G., Miščevć, P., (2014) Impact of weathering on slope stability in soft rock mass. Faculty of Civil Engineering, Architecture and Geodesy, University of Split, Croatia 12. Dempsey, C., (2020) Physical and Chemical Weathirng of Rocks, Geomorphology 13. Deo, P., (1972), Shales ...Anđela Despotov. Uticaj raspadanja na stabilnost kosina u mekoj stenskoj masi, 2024
-
Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides
Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)... Cerna Fault; TF - Timok Fault. Map is compiled and modified after geological maps of Serbia, Romania and Bulgaria and Maţenco (2017). Structural pattern is modified after Maţenco (2017) and Krstekanić et al. (2020) while the suggested continuation of Timok Fault below the Sofia basin is according ...
... gravitational acceleration and h is the thickness of overlying sand layer) in the experiments is 220 Pa, corresponding to 280 MPa in nature, which results in a stress-scale ratio of 7.87∙10−7. Strength profiles (Fig. 2e and f) are representative for the initial con- ditions and have been calculated following ...
... fronts, suture zones and retro-shears) of the Medi- terranean Alpine-age orogens (modified from Krstekanić et al., 2020). Blue rectangle shows the location of Fig. 1c. STEP – Subduction-Transform Edge Propagator system in the South Carpathians. White arrow indicates the direction of slab tearing. b) Regional ...Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović. "Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides" in Journal of Structural Geology, Elsevier BV (2021). https://doi.org/10.1016/j.jsg.2021.104386
-
Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова
Milena Rosić (2014-12-05)У оквиру ове докторске тезе, испитиване су оптималне методе за добијањенанопраха – калцијум манганског оксида допираног јонима гадолинијума. Циљистраживања је испитивање одговарајућих прекурсора који су подесни да седобију чисти нано прахови манганита са перовскитском структуром, као имонофазни чврсти раствори са перовскитском структуром. Као подесан методкоришћена је модификована глицин нитратна метода, а од прекурсора нитрати иацетати одговарајућих метала. Модификација глицин нитратне методе се односина делимичну замену нитрата ацетатима, чиме је ублажена бурност реакције.Испитан је различити однос прекурсора, који дају наночестичне ...... obtain pure nano powders of perovskite manganite structure, as well as single-phase solid solutions with a perovskite structure. As a suitable method used is a modified glycine nitrate method, a precursor nitrates and acetates of the respective metals. Modification of the procedure was performed ...
... structural and magnetic properties of nanostructured Ca0.9Gd0.1MnO3 obtained by modified glycine nitrate procedure (MGNP), Ceramics International, 37, 4 1313–1319. Rosić, M., Logar, M., Zagorac, J., Devečerski, A., Egelja, A., Kusigerski, V., Spasojević, V., Matović, B. (2013): Investigation of the ...
... Devečerski, A., Egelja, A., Kusigerski, V., Spasojević, V., Matović, B. (2013): Investigation of the structure and the magnetic behaviour of nanostructured Ca1-xGdxMnO3 (x=0.05; 01; 0.15; 0.2) obtained by modified glycine nitrate procedure, Ceramics International, 39, 2, 1853–1861, IF=1.751, ISSN: 0272-8842 ...Milena Rosić. "Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-12-05)
-
A hundred years of Milutin Milanković's climate change theory - geological implications
Dejan Radivojević (2020)Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт... so-called “grand cycles” of 400 kyr, and 1.25, 2.35 and 4.6 my (oLSEN, 2001). The effects of these longer period cycles are only potentially noticeable in climate records of several to tens of millions of years. The Milanković’s cycles are the basis of cy- clostratigraphy, one of the youngest stratigraphic ...
... influence in creation of Astronomic Time Scale, supporting of continental drift hypothesis and palaeo- climatology implications. Positive results of the implementation of the astronomic time scale to the Neo- gene stratigraphy initiated the application of this method within the Mesozoic, and lately also to ...
... where he spent the rest of the WWI under police surveillance working in the Library of Hungarian Academy of Sci- ence and Hungarian Meteorological Service. Even being in house arrest he continued working on re- search and finished new mathematical theory of as- tronomical forcing of climate changes in 1917 ...Dejan Radivojević. "A hundred years of Milutin Milanković's climate change theory - geological implications" in Geološki anali Balkanskoga Poluostrva, Univerzitet u Beogradu, Rudarsko geološki fakultet (2020). https://doi.org/10.2298/GABP201125011R
-
Избор одговарајуће механичке методе
Анастасија Мирјанић (2024)Експлоатација нафте и гаса кључна је за задовољење глобалних енергетских потреба. Различите методе се користе за ефикасно вађење тих природних ресурса из земљe. Механичке методе експлоатације, које укључују различите врсте пумпи и компресора, играју значајну улогу у овом процесу. У нафтној индустрији, ефикасно вађење нафте и гаса зависи од избора одговарајуће технологије пумпања. Две од најраспрострањенијих технологија су дубинске пумпе са клипним шипкама (енгл. Sucker rod pumps- SRP) и електричне потапајуће пумпе (енгл. Electrical submersible pump- ESP). Овај завршни рад ће ...Анастасија Мирјанић. Избор одговарајуће механичке методе, 2024
-
Automatic construction of a morphological dictionary of multi-word units
The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...electronic dictionary, Serbian, morphology, inflection, multiwordn units, noun phrases, query expansion... Obradović2, Duško Vitas3, and Miloš Utvić1 1 Faculty of Philology, University of Belgrade 2 Faculty of Mining and Geology, University of Belgrade 3 Faculty of Mathematics, University of Belgrade Abstract. The development of a comprehensive morphological dictio- nary of multi-word units for Serbian ...
... [9]) that controls the production of all inflected forms. The forms/lemmas ratio in Table 1 shows that a direct production of DELACF dictionary is out of the question for Serbian, though it may seem possible for some other languages. For instance, for English this ratio for MWU nouns is 1.90, whereas for ...
... number of combining conditions. As for the inflection of constituent simple words, it relies completely on FSTs for the inflection of simple words. This way, the generation of all inflected forms with Multiflex is performed with two types of FSTs: for inflection of simple words and for inflection of MWUs ...Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić. "Automatic construction of a morphological dictionary of multi-word units" in Lecture Notes in Computer Science 6233, Advances in Natural Language Processing, Proceedings of the 7thInternational Conference on NLP, IceTAL 2010, Reykjavik, Iceland, August 2010, Springer (2010): 226-237. https://doi.org/10.1007/978-3-642-14770-8_26
-
Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series
Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija... 15 of 20 Within the grouping step, we only have signal and noise components and we use two groups of indices, I; = {Avy,,Ay, } and Iz = {Av,,Ay, } and associate the group I; with signal component and the group I with noise. The reconstructed series of x coordinates of the marker M, composed of the ...
... 14, 3710 15 of 20 Within the grouping step, we only have signal and noise components and we use two groups of indices, I1 = { λV1 , λV2 } and I2 = { λV3 , λV4 } and associate the group I1 with signal component and the group I2 with noise. The reconstructed series of x coordinates of the marker M1 ...
... the possibilities of model and conclusions are provided in the Results and Conclusion section. Obtained results show a high level of correlation of original and reconstructed series of the support deformations. Based on these results, it can be concluded that the model is reliable and applicable for solving ...Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić. "Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series" in Energies, MDPI (2021). https://doi.org/https://doi.org/10.3390/en14123710
-
Методологија интегралне анализе сценарија енергетског развоја
Александар Маџаревић (2019)енергетска безбедност, сценарио развоја, фази логика, сигурност снабдевања, доступност, расположивост, природни гас... org/sites/default/files/USIndexFinal2PDF.pdf US Chamber of commerce, International Index of Energy Securityм Risk, 2015Ed. Washington DC, 2015. Jewell, J., The IEA model of short-term energy security (MOSES) primary – energy sources and secondary fuels, Paris, International Energy Agency, 2011., доступно ...
... Jang J., Maters, H., EU standards for energy security of supply, ECN/Clingendael International Energy Program Petten, The Netherlands, European Commission, Directorate-General for Energy and Transport, 2007. Gupta E., Oil vulnerability index of oil-importing countries, Energy Policy 2008, Volume ...
... by ECFP7 under the theme “Energy Security of Supply”, Final Workshop, Brussels, 2011. US Chamber of commerce, Index of US Energy Security Risk, 2012, Washington DC, 2011. АЛЕКСАНДАР МАЏАРЕВИЋ 175 ЛИТЕРАТУРА Global Energy Institute, INDEX OF U.S. ENERGY SECURITY RISK, 2017, доступно ...Александар Маџаревић. Методологија интегралне анализе сценарија енергетског развоја, Рударско-геолошки факултет, 2019
-
Geotehnički aspekti izgradnje visećeg pešačkog mosta u Starom gradu u Užicu
U radu su prikazani rezultati geotehničkih istraživanja za potrebe izgradnje visećeg pešačkog mosta preko klisure reke Đetinje u Užicu. Predviđeno je da most, sistema prednapregnute trake, omogući prelaz pešacima sa desne dolinske strane na stranu Starog grada, koja je opasana strmom liticom (cca. 40 m visine). Za potrebe formiranja geotehničkog modela i strukturnog sklopa krečnjačke stenske mase korišćen je postupak fotogrametrijskog snimanja dronom. Predviđeno je da se zatežuća sila (od oko 30 MN), koju most prenosi na obalni stub, ...fotogrametrija, stabilnost kosina, pukotine, prednapregnuta sidra, test granične nosivosti, paker (Ližonov) test... S. (2006) Empirical estimation of rock mass modulus. International Journal of Rock Mechanics and Mining Sciences, 43, 203-215 ttps://doi:10.1016/j.ijrmms.2005.06.005 3 Hoek, E., Carter, T.G., Diederichs, M.S. (2013) Quantification of the Geological Strength Index Chart 47th US Rock Mechanics / ...
... repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs • SAVEZ GRAĐEVINSKIH INŽENJERA SRBIJE - ASSOCIATION OF CIVIL ENGINEERS OF SERBIA ...
... GEOTEHNIČKI ASPEKTI GRAĐEVINARSTVA I ZEMLJOTRESNO INŽENJERSTVO GEOTECHNICAL ASPECTS OF CIVIL ENGINEERING AND EARTHQUAKE ENGINEERING •_·_ SAVEZ GRAĐEVINSKIH INŽENJERA SRBIJE - A4SSOCIATION OF CIVIL ENGINEERS OF SERBIA GEOTEI_·INIČKI ASPEKTI GRAĐEVINARSTVA I ZEMLJOTRESNO INŽENJERSTVO – Vrnjačka ...Zoran Berisavljević, Miloš Marjanović, Uroš Đurić. "Geotehnički aspekti izgradnje visećeg pešačkog mosta u Starom gradu u Užicu" in Zbornik radova / Međunarodno naučno-stručno savetovanje Geotehnički aspekti građevinarstva i zemljotresno inženjerstvo, Vrnjačka banja, 1-3. novembar 2023., Beograd : Savez građevinskih inženjera Srbije (2023.)
-
Upper Miocene depositional environments of the Kikinda-Mokrin High (Serbia)
Saša Ivanišević, Dejan Radivojević (2018)Exploration for oil and gas in mature areas, such as the Pannonian Basin, can benefit from reexamination of old data using more advanced modern workflows that focus on the temporal and spatial aspects of sediment deposition. Specifically, we apply a new environment of deposition model that interprets the Upper Miocene- Pliocene sediments as being deposited in a rapidly filling basin characterized by quick shelf edge progradation from the northwest toward the southeast. Reconstruction of this shelf edge trajectory reveals ...Saša Ivanišević, Dejan Radivojević. "Upper Miocene depositional environments of the Kikinda-Mokrin High (Serbia)" in Interpretation, AAPG SEG (2018). https://doi.org/10.1190/INT-2017-0084.1