Претрага
914 items
-
Mogućnosti maksimalnog iskorišćenja mineralno-sirovinskog potencijala ležišta uglja Veliki crljeni, kolubarski ugljonosni basen
Draško Zoran, Vučković Bogoljub, Radovanović Biljana, Trobozić Dragan. "Mogućnosti maksimalnog iskorišćenja mineralno-sirovinskog potencijala ležišta uglja Veliki crljeni, kolubarski ugljonosni basen" in Зборник радова 15. конгреса геолога Србије са међународним учешћем, Београд, [26-29 мај] 2010. = Proceedings of the 15th Congress of Geologists of Serbia with International Participation, Belgrade [26-29 May] 2010 1, Beograd:Srpsko Geološko društvo (2010): 195-198
-
Application of structure from motion technique for engineering geological mapping of underground rooms
Dragana Đurić, Branislav Sretković, Uroš Đurić, Zoran Radić, Dejan Vučković. "Application of structure from motion technique for engineering geological mapping of underground rooms" in XVIII Kongres geologa Srbije, Divčibare, Srbija (01-04.2022.), Srpsko geološko društvo (2022)
-
Geofizička istraživanja tonjenja lesa u Zemunu
Dragana Đurić, Branislav Sretković, Uroš Đurić, Zoran Radić, Dejan Vučković. "Geofizička istraživanja tonjenja lesa u Zemunu" in XVIII Kongres geologa Srbije, Divčibare, Srbija (01-04.2022.), Srpsko geološko društvo (2022)
-
Kompleksno iskorišćenje mineralno-sirovinskog potencijala leđišta uglja Veliki Crljeni, kolubarski ugljonosni basen (mogući scenario)
Vučković Bogoljub, Nešić Duško, Bogdanović Vesna, Draško Zoran, Klemčić Goran. "Kompleksno iskorišćenje mineralno-sirovinskog potencijala leđišta uglja Veliki Crljeni, kolubarski ugljonosni basen (mogući scenario)" in Savremene tehnologije u rudarstvu i zaštiti životne sredine : zbornik radova / I Međunarodni simpozijum RUDARSTVO 2010, Tara 24. - 26. Maj, 2010 = Modern Technologies in Mining and Environmental Protection : proceedings 1, Tara:Privredna komora Srbije (2010): 93-98
-
Named Entity Recognition for Distant Reading in ELTeC
Francesca Frontini, Carmen Brando, Joanna Byszuk, Ioana Galleron, Diana Santos, Ranka Stanković (2020)Akcija COST „Udaljeno čitanje za evropsku književnu istoriju“, koja je počela 2017. godine, ima među svojim glavnim ciljevima stvaranje višejezične zbirke evropskih književnih tekstova (ELTeC) otvorenog koda. U ovom radu predstavljamo rad koji je obavljen na ručnom označavanju selekcije ELTeC kolekcije za imenovane entitete, kao i na proceni postojećih alata za prepoznavanje imenovanih entiteta u pogledu njihove sposobnosti da automatski urade takve anotacije. U poslednjem paragrafu se razmatraju zajedničke tačke između ove inicijative i CLARIN-a.Francesca Frontini, Carmen Brando, Joanna Byszuk, Ioana Galleron, Diana Santos, Ranka Stanković. "Named Entity Recognition for Distant Reading in ELTeC" in CLARIN Annual Conference 2020, Oct 2020, Virtual Event, France, CLARIN (2020)
-
The Reciprocal Algebraic Integers Having Small House
Dragan Stankov (2021)Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials... b = 2a then P2(x)(x d−b − 1) = xd+d−b + xd−a+d−b − xd−b+d−b + xb+d−b − xa+d−b − xd−b − (xd + xd−a − xd−b + xb − xa − 1) that is P2(x)(xd−b − 1) = xd+d−b + xd−a+d−b − xd−b+d−b − xa+d−b − xd−a − xb + xa + 1. Since 2a = b it follows that either a + d − b > d − a or a + d − b < d − a. In the �rst case ...
... Since, using (2.7), d + b > d − a + b > d − a > d − b > a > 1 and d + b > d − a + b > 2b > a + b > a > 1 it follows that all pairs of eventually equal exponents are: (2b, d − a), (2b, d − b), (a + b, d − a), (a + b, d − b). Finally, we conclude that if d = 2a + b, d = a + 2b, d = 3b (2.8) then P3(x)(x ...
... − 1. Since d − b > b it follows that d > 4a then for p = d − 3a P(x)(xd−3a − 1) = = xd+d−3a + xd−a+d−3a − xd−2a+d−3a + x2a+d−3a − xa+d−3a − xd−3a − (xd + xd−a − xd−2a + x2a − xa − 1) is equal to xd+d−3a + xd−a+d−3a − xd−2a+d−3a − xd − xd−3a − x2a + xa + 1. Since P(x) is primitive and d > 5 it follows ...Dragan Stankov. "The Reciprocal Algebraic Integers Having Small House" in Experimental Mathematics (2021). https://doi.org/ 10.1080/10586458.2021.1982425
-
A necessary and sufficient condition for an algebraic integer to be a Salem number
Dragan Stankov (2019)We present a necessary and sufficient condition for a root greater than unity of a monic reciprocal polynomial of an even degree at least four, with integer coefficients, to be a Salem number. This condition requires that the minimal polynomial of some power of the algebraic integer has a linear coefficient that is relatively large. We also determine the probability that an arbitrary power of a Salem number, of certain small degrees, satisfies this condition.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials... 2 ( d d − 2 ) ( 2 + d−2 ∑ k=2 |ak,n| ) = 1 2 ( d d − 2 ) ( 2 + 2|ǫ2 + Tǫ1 + 1| + 2 d/2−1 ∑ j=3 |ǫj + Tǫj−1 + ǫj−2| + |2ǫd/2−2 + Tǫd/2−1| ) ≤ 1 2 ( d d − 2 ) ( 2 + 2ǫ2 + 2|T |ǫ1 + 2 + 2 d/2−1 ∑ j=3 (ǫj + |T |ǫj−1 + ǫj−2) + 2ǫd/2−2 + |T |ǫd/2−1 ) ≤ 1 2 ( d d − 2 ) ...
... We need to estimate 1 (4 d 5) (245 > ous!) d/2-1 d (<5) (2 + 2\e2 +7Te + 1| +2 S> |e; + Tej-1 + €;—2| j=3 d/2 + |2€q/2-2 + Tegal 1 d d/2-1 <5 (55) (2 + 2e9 + 2\Tley +242 a (e; + |T]ej;-1 + 6-2) + 2€q/2-2 + eyes] 1 d < = | —— } (44+ (2d- — 3)|\T $5 (<5) + (2d — 8)e + (d — 3)|T]e) So the condition ...
... equal, for every sufficiently large n, to D + s1. Finally (2.6) becomes D + s1 > 2 + |Ds1 + 2| i.e. D + s1 − 2 > Ds1 + 2 > −D − s1 + 2. Solving this double inequality for s1 we get − D D + 1 < s1 < D − 4 D − 1 . When n0 tends to infinity we obtain −1 < s1 < 1 i.e. −1/2 < cos θ1 < 1/2. It follows that ...Dragan Stankov. "A necessary and sufficient condition for an algebraic integer to be a Salem number" in Journal de theorie des nombres de Bordeaux (2019). https://doi.org/10.5802/jtnb.1076
-
Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels
Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković. "Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels" in SPE Journal (2023)
-
Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду
главни и одговорни уредник Душан Поломчић. Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2016
-
Long-Term Planning Methodology for Improving Wood Biomass utilization
Vukašinović V., Gordić D., Živković Marija, Končalović D., Živković D.. "Long-Term Planning Methodology for Improving Wood Biomass utilization" in 3rd South East European conference on sustainable development of energy, water and environment systems (2018): 66
-
A Fuzzy Expert Model for Availability Evaluation
Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić. "A Fuzzy Expert Model for Availability Evaluation" in Proceedings of the 2019 20th International Carpathian Control Conference (ICCC), AGH University of Science and Technology, Kraków - Wieliczka, Poland (2019)
-
Geotehnički uslovi izgradnje metro stanice "Francuska" u Beogradu
Lazar Pavlović (2024)Cilj ovog rada je analiza stabilnosti dijafragme, predviđene kao mere za obezbeđenje dubokog iskopa od zarušavanja okolnog tla koji se izvodi na mestu buduće metro stanice “Francuska” koja je planirana u okviru prve faze, prve linije metroa u Beogradu – sekcije „Centar“. U okviru numeričke analize je izvršena analiza stabilnosti konzolne dijafragme kao i dijafragme sa ankerom – slobodno oslonjene dijafragme, kako bi se moglo napraviti poređenje dobijenih vrednosti koje se odnose na dubinu fundiranja koja je potrebna da ...... das=D+hMh+ D +11 +—= D + 11 + 2.25 = D + 13.25 m = 48.9835 + 13.25 62.23m Eae = ' (oyk – ofđp) · ha = x (103.68 — 57.87) · 4.5 = 0.5 · 45.81 · 4.5 = 103.07 k\/m de=D+h,}+ D +11 +—= D + 11+ 1.5 = D + 12.5 m= 48.9835 + 12.5 61.48m Eay = o · ha = 100.52 · 11 = 1105.72 kN/m! day = D + * = D ...
... + Eao · dao + Eaio ' daio – Epi 'dpi – Epa ' dpy =0 52.78 · (D + 19.75) + 171.53 · (D + 18.67) + 50 · (D + 16) + 5.15 · (D + 15.83) + 260.41 · (D + 13.25) + 103.07 · (D + 12.5) + 1105.72 · (D + 5.5) + 606.92 · (D + 3.67) + 159D · (D) +4.16D? · (g) — 52.85 · (9) — 10.84Dp? · (%) =0 2 2 52.78D ...
... dobija: + D.,=1.2· D=1.2·48.9835 = 58.78m 65 d, =2 4. 49 m =1 6. 33 m Skica 2. Dijagram aktivnih i pasivnih pritisaka koji deluju na konzolnu dijafragmu 66 dg =2 4. 49 m d, a= 52 .6 5m da 7= 54 .4 8m d„ =6 1, 48 m d, .= 62 .2 3m d„ =6 4. 81 m d, a= 64 .9 8m d, =6 7. ...Lazar Pavlović. Geotehnički uslovi izgradnje metro stanice "Francuska" u Beogradu, 2024
-
Hydrogeothermal potentials of Rogozna mountain and possibility of their valorization
D. R. Ivanović, Dj. A Valjarević, R. D. Srećković-Batoćanin, N. M. Martić-Bursać, D. Ž. Vukoičić, R. M. Ivanović (2020)D. R. Ivanović, Dj. A Valjarević, R. D. Srećković-Batoćanin, N. M. Martić-Bursać, D. Ž. Vukoičić, R. M. Ivanović. "Hydrogeothermal potentials of Rogozna mountain and possibility of their valorization" in Open Geosciences, Walter de Gruyter GmbH (2020). https://doi.org/10.1515/geo-2019-0083
-
A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers
Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...... follows: μ(RB1-D)exc = 0.1/(0.1+0.22+0.5+0.93+0.98) = 0.04 μ(RB1-D)good = 0.22/(0.1+0.22+0.5+0.93+0.98) = 0.07 μ(RB1-D)aver = 0.5/(0.1+0.22+0.5+0.93+0.98) = 0.18 μ(RB1-D)adeq = 0.93/(0.1+0.22+0.5+0.93+0.98) = 0.34 μ(RB1-D)poor = 0.98/(0.1+0.22+0.5+0.93+0.98) = 0.36 where: μ(RB1-D)exc+ … +μ(RB1-D)poor = 1 ...
... 0.67, 0.14) (15) μFB1-D = (0.075, 0.375, 0.475, 0.475, 0.1) (16) 4.1.3 Fuzzy Inference Machine B1-D was analyzed. Fuzzy assessments μRB1-D, μMB1-D and μFB1-D (14, 15 and 16) were synthesized into the assessment of E, using max-min composition. In this case, it is possible to ...
... (18) where is: μE(B1-D) according to (17) and μexc according to (2) For other fuzzy sets: d2(E(B1-D), good) = 0.592, d3(E B1-D), aver) = 0.605, d4(E B1-D), adeq.) = 1.073, d5(E B1-D), poor) = 1.221. - for dmin = d2: μ 2 = 0.278, μ 3 = 0.272, μ 4 = 0.153, μ 5 = 0.135. (19) Finally, the ...Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić. "A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers" in International Journal of Industrial Engineering: Theory, Applications and Practice (2019)
-
Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation
kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanjeTaco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer. "Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation" in Geophysical Journal International, Oxford University Press (OUP) (2021). https://doi.org/10.1093/gji/ggab120
-
Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints
Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski. "Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints" in Journal of Geodynamics, Elsevier BV (2024). https://doi.org/10.1016/j.jog.2024.102058
-
Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III)
M. Misz-Kennan, J. Kus, D. Flores, C. Avila, Z. Büçkün, N. Choudhury, K. Christanis, J.P. Joubert, S. Kalaitzidis, A.I. Karayigit, M. Malecha, M. Marques, P. Martizzi, J.M.K. O'Keefe, W. Pickel, G. Predeanu, S. Pusz, J. Ribeiro, S. Rodrigues, A.K. Singh, I. Suárez-Ruiz, I. Sýkorová, N.J. Wagner, D. Životić (2020)Self-heating of coal waste is a major problem in the leading coal-producing and consuming countries, independent of the recent or past coal exploitation history. The phenomenon of self-heating is dependent on many factors such as the properties of organic matter (maceral composition and rank), moisture and pyrite content, climate effects, and storage conditions (shape of the dump or compaction of the coal waste). Once deposited, coal waste undergoes oxidation, which can lead to self- heating with the overall temperatures ...... vi de d in to ap pe ar an ce (c ra ck ed an d m ic ro fr ac tu re d, ox id at io n ri m s (p al er an d da rk er in co lo ur ), pl as ti ci ze d ed ge s, ba nd s, re la ti ve ly pa le r co lo ur an d of w hi ch re fl ec ta nc e is hi gh er th at of un al te ...
... rm s w er e fu rt he r di vi de d in to ap pe ar an ce (c ra ck ed an d m ic ro fr ac tu re d, ox id at io n ri m s (p al er an d da rk er in co lo ur ), pl as ti ci ze d ed ge s, ba nd s, re la ti ve ly pa le r co lo ur an d of w hi ch re fl ec ta nc e is hi ...
... ci se B ac kg ro un d V r (% ) N um be r of fo rm s id en ti fi ed 20 09 C ra ck s an d m ic ro fi ss ur es , ox id at io n ri m s (p al er an d da rk er in co lo ur ), pl as ti ci ze d pa rt ic le s (p ar ti cl es w it h po ro si ty an d pa rt ic le s w it h ...M. Misz-Kennan, J. Kus, D. Flores, C. Avila, Z. Büçkün, N. Choudhury, K. Christanis, J.P. Joubert, S. Kalaitzidis, A.I. Karayigit, M. Malecha, M. Marques, P. Martizzi, J.M.K. O'Keefe, W. Pickel, G. Predeanu, S. Pusz, J. Ribeiro, S. Rodrigues, A.K. Singh, I. Suárez-Ruiz, I. Sýkorová, N.J. Wagner, D. Životić. "Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III)" in International Journal of Coal Geology, Elsevier BV (2020). https://doi.org/10.1016/j.coal.2020.103411
-
Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides
Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis... Contrary to the D, deformation phase that only affected the Paleozoic and Northem Triassic unit of the Drina- Ivanjica thrust sheet, D> deformation phase has also affected the Albian-Campanian transgressive succession providing further evidence for the timing of D, and D» events. As shown ...
... asymmetry of F, folds suggests top-WNW tec- tonic transport direction for D, phase. Transposition by solution and neo-crystallization of So„ bedding due to intense D, deformation was frequently observed (Fig. 3). Structures of D, phase were not observed neither in the Southern Triassic unit which ...
... the Paleozoic basement all the way to the Upper Cretaceous (Fig. 2a). The trend of F» fold axes and D» thrusts implies a NE-SW shortening direction for the D> phase (Fig. 2c). The vergence of D» thrusts and asymmetric F. folds are top-SW in the NE part of the study area, but top-NE in the SW ...Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor. "Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides" in Swiss Journal of Geosciences (2019)
-
Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)
... deformation stages D, and D, resulted in the formation of folded drawn boudin trains in Ordovician meta-argillites (Fig. 11). The boudin trains were initially formed in the extensional domain of D, strain ellipsoid and were subse- quently folded by simple shearing during D, (Fig. 11b). Spaced ...
... order. Variscan Orogeny First deformation stage D, Evidence of deformation stage D, is generally scarce, as the resulting structures have been strongly overprinted during the subsequent deformation stage D,. Structures formed during D, were documented in both the Lower Complex (e.g. Fig ...
... constraining a maximum age of D, to the lower Emsian (ca. 408 + 3 Ma; Cohen et al. 2013). Mini- mum age constraints on D, could not be clearly defined, but it certainly predates the onset of the deformation stage D, which is discussed below. Second deformation stage D, Penetrative foliation S» ...Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Richard Spikings, Andreas Wetzel. "Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)" in International Journal of Earth Sciences, Springer Science and Business Media LLC (2016). https://doi.org/10.1007/s00531-016-1380-6
-
A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)
Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin. "A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)" in Underground Mining Engineering no. 29, Belgrade : University of Belgrade - Faculty of mining and geology (2016): 43-54