Претрага
1063 items
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Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike
Мирослав Црногорац, Душан Даниловић, Лола Томић. "Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike" in IX Naučno stručni skup Preduzetništvo, inženjerstvo i menadžment Zrenjanin, 24.10.2020. god., Visoka tehnička škola strukovnih studija u Zrenjaninu (2020)
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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
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Preparation, synthesis and characterization of nanometric Ca0.9Er0.1MnO3
Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)... University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia For Publisher Prof. Dr. Biljana Pajin Printing layout Vladimir V. Srdić, Marija Milanović, Ivan Stijepović Press , TRI 0 Štamparija, Aranđelovac CIP – Karanorunauuja y nyOnakannju BuOnuoreka Marurnce cpricke, HoBu Cajn ...Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić. "Preparation, synthesis and characterization of nanometric Ca0.9Er0.1MnO3" in Programme and Book of abstracts 15th ECerS Conference for Young Scientists in Ceramics, Novi Sad, Serbia October 11-14, 2023 , Novi Sad : Faculty of Technology, University of Novi Sad (2023)
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Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine Nitrate Procedure
Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica (2023)... Skopje, R. N. Macedonia Iva Dimitrievska, MSc, Faculty of Technology and Metallurgy, Ss. Cyril and Methodius University in Skopje, R. N. Macedonia Marija Prosheva, MSc, Faculty of Technology and Metallurgy, Ss. Cyril and Methodius University in Skopje, R. N. Macedonia Ivona Sofronievska, MSc, Institute ...Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica. "Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine Nitrate Procedure" in Book of Abstracts / 26th Congress of SCTM with international participation, 20-23 September 2023, Ohrid, R. Macedonia, Skopje : Society of Chemists and Technologists of Macedonia (2023)
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Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava
Boban S. Pavlović (2022)Aktuelnu energetsku tranziciju odlikuje ubrzanje procesa dekarbonizacije energetskih sistema, unapređenje energetske efikasnosti, razvoj čistijih tehnologija baziranih na obnovljivim izvorima energije i održivije korišćenje prirodnih resursa. Da bi se napravio ovako krupan zaokret u postojećim energetskim sistemima, osim promene postojećih tehnologija, potrebno je u planiranje energetske tranzicije uključiti i političke, sociološke, ekonomske i ekološke aspekte, a pre svega obrasce ponašanja i donošenja odluka krajnjih potrošača. Predmet istraživanja u disertaciji je energetska tranzicija sektora domaćinstva, preciznije tranzicija u grejanju domaćinstava, imajući u ...energetika, energetska tranzicija, energetsko planiranje, energetsko modeliranje, obnovljivi izvori energije, domaćinstva, ponašanje potrošačaBoban S. Pavlović. Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava, Beograd : [B. Pavlović], 2022
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Analiza toplotne moći i Vobeovog indeksa prirodnog gasa različitog porekla
Lana Mitrović (2024)U radu su prikazane najznačajnije osobine prirodnog gasa, uključujući hemijski sastav, jednačine sagorevanja i termodinamičke karakteristike koje predstavljaju osnovu za dalje razumevanje rada. Prikazane su količine prirodnog gasa na evropskom trţištu prema zemlji porekla, kao i njihove zasebne hemijske i termodinamičke karakteristike.Kvalitet prirodnog gasa u Republici Srbiji je posebno poglavlje u radu u okviru kog je detaljnjije opisano snabdevanje Republike Srbije prirodnom gasom, kao i zahtevani kvalitet.Na kraju, obuhvatajući sve prethodno navedeno, prikazan je postupak rešavanja Studije slučaja koja ...Lana Mitrović . Analiza toplotne moći i Vobeovog indeksa prirodnog gasa različitog porekla, 2024
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Анализа рада гас лифта на нафтном пољу К
Тамара Бркан (2024)Анализа рада гас лифта укључује детаљну процену перформанси, идентификацију проблема, симулацију и моделирање, као и опримизацију и прилагођавање система. Циљ је осигурати да гас лифт функционише ефикасно уз повећање производње и уз што мање оперативне трошкове. У даљем тексту биће описана анализа рада гас лифта на нафтном пољу К, као и поређење најекономичнијег решења.... KOJIHUMHC TIpOH3BOJHe H yHyTpanm»er rpeuHuHKa TyOHHra: SFmax = 0,005 + 10“ · Q.: f(Dit) TIpu ueMy je: m3 Q-o – orrHMajnHa IIpoH3BOjnua Ha(be, [—d ] aT. IIorpeOuHo je ojpe/nuru H ropbby H JOPĐ>y HIpena3Hy nyOMHy. IIpBa npenaaHa NyOMHa LA npencraBjba rpaHMuHy JyOHHy H3HaJL KOJeE Cc Hc MOXe mnocTuhu ...
... H3ajnBojeHor raca: GOR = 62 % ; I ycruHa raca: ps = 0,726 %; IIpHrHcak HHjeKTHpaha raca: P;n = 52 bar ; KomripecHOumarer: Z = 0,91; IIpeunuk TyOHnra: D= 27/8 "=0,07302 m ; BeHrmi: Dr = 4,76, R = 0,035 27 IIpanMKOM IpojeKTOBaMba HOBpeMeHor rac Jm(pra, Kao HITO CMO Beh peKJm, THpBH KOpak je oj ...
... e?027 109.9,81:0,91 PinjB = 55,5 [bar] (3) akrop cMemraja (f(Dit)) yaHMaMo My3 TaOeJe y 34aBHCHOCTH OJI rpeuHuka TyOuHra, uuja je BpenHocT 3a D,= 27/8 "=0,94008 Munumainiu (bakTop cMetmrraja: SFnin= 0,0046 + 10“ · 2,32 · 0,94008 SFmin = 0,0050 MakcumainHu (bakTop cMermrraja: SFmax= 0 ...Тамара Бркан. Анализа рада гас лифта на нафтном пољу К, 2024
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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)
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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
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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
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Pseudo-linear combination of fuzzy metrics
... non-empty set X is the mapping, d: X x X — R/ which is symmetric. Metrics are most often used, but also the so- called similarities (that is, diferences) where it is in the definition metrics triangle inequality replaced by d(z,z) > 7(d(z,y),d(y,ž)) or d(z,z) < S(d(z,y),d(y, )), (for some triangulated ...
... and d be a fuzzy set defined on X x X x (0,+oo), and satisfies the folluwing conditions for all z,y, z e X, a,8 > 0: (1) (i) diz,y,o) c [0,1), (ii) d(z,y, ) c (0,1]; (2) (i) ddzx,y,au)=0<= r= , (ii)) diz,y,q) =1==z==" (3) (i), (ii), diz,g,o) = d(y,r,a); (4) (i) S(d(z,y,a),d(y,z,B)) > d(z,z,a ...
... (ii) a Juzzy T-metric and a triple (X,d, T' is Juzzy T-metric space (where d sat- isfies axioms (1)—(5)(ii)). If instead of (1), it holds that d(z,y,a) c |0,1], the fuzzy set d is a Juzzy S-metric (fuzzy T-metric) in the broader sense, and (X,d,S) ((X,d,T')) is a fuzzy S-metric (fuzzy T-metric) ...Nebojsa M. Ralević, Bratislav D. Iričanin, Dejan Ćebić. "Pseudo-linear combination of fuzzy metrics" in Publications de l’institut mathematique, Mathematical Institute of the Serbian Academy of Sciences and Arts (2024)
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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)
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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
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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)
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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
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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)
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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
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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
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Fizičko-geografske karakteristike vulkana Teide na Kanarskim ostrvima
Radovanović D., Srećković -Batoćanin D., Valjarević A., Ivanović R., Veselinović J.. "Fizičko-geografske karakteristike vulkana Teide na Kanarskim ostrvima" in 4. Srpski Kongres geografa, Kopaonik 7-9.oktobar (2015)
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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