Претрага
852 items
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The number of unimodular roots of some reciprocal polynomials
Dragan Stankov (2020)We introduce a sequence P2n of monic reciprocal polynomials with integer coefficients having the central coefficients fixed. We prove that the ratio between number of nonunimodular roots of P2n and its degree d has a limit when d tends to infinity. We present an algorithm for calculation the limit and a numerical method for its approximation. If P2n is the sum of a fixed number of monomials we determine the central coefficients such that the ratio has the minimal limit. ...Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "The number of unimodular roots of some reciprocal polynomials" in Cmptes rendus mathematique (2020). https://doi.org/10.5802/crmath.28
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Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit
... (8) is reduced to: 1-n- c 1 -n 1 -n s Rn-k R- Rk-R sR k , (9) namely to: 1-n- c 1 -n 1 -n s R-n R- R-R sR , R1 < Rc < Rs. (10) No. 3, 2015 Mining & Metallurgy Engineering Bor 56 From the equation (10) the following is obtained: 1 1 1 1 n n s n s c RR RRn R , R1 ...
... (5), for- mula (8) se svodi na: 1-n- c 1 -n 1 -n s Rn-k R- Rk-R sR k , (9) tj. na: 1-n- c 1 -n 1 -n s R-n R- R-R sR , R1 < Rc < Rs. (10) Broj 3, 2015. Mining & Metallurgy Engineering Bor 66 Iz jednačine (10) dobijamo: 1 1 1 1 n n s n s c RR RRn R , R1 < Rc < Rs. ...
... .., N, are used from the table of experimental data, so that: n 111 RvK n 222 RvK ... n NNN RvK , whereby, for parameter K, the arithmetic mean is used, namely: N KKK K N...21 . (19) In this way, the model for solving the rock mass oscillation law is determined, taking: n RKv ...Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić. "Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit" in Mining and Metallurgy Engineering Bor, Bor : Mining and Metallurgy Institute Bor (2015). https://doi.org/10.5937/MMEB1503053L
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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 polynomialsDragan 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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The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments
Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...... n-C20)+Σodd(n-C17–n-C21) / Σeven(n-C18–n-C22)]; cCPI deter- mined for distribution of n-alkanes C23–C35 (mass chromatogram m/z 71), CPI (C23–C35) = 1/2 [Σodd(n-C23– –n-C35) / Σeven(n-C22–n-C34)+Σodd(n-C23–n-C35) / Σeven(n-C24–n-C36)]; dPr/Ph = pristane/phytane Tricyclic and pentacyclic terpanes. The ...
... n of n-alkanes C16–C35 (mass chromatogram m/z 71), CPI (C16–C35) = 1/2 [Σodd(n-C17–n-C35) / Σeven(n-C16–n-C34) + Σodd(n-C17–n-C35) / Σeven(n-C18–n- –C36)]; bCPI determined for the distribution of n-alkanes C16–C22 (mass chromatogram m/z 71), CPI (C16– –C22) = 1/2 [Σodd(n-C17–n-C21) / Σeven(n-C16– ...
... such as gaso- line and diesel, have different n-alkane distributions, which range from n-C6 to n-C12, and n-C12 to n-C25, respectively. Moreover, these derivatives do not con- tain polycyclic biomarkers of the sterane and terpane types.7,8 Similarly to n-alkanes, the distributions of polycyclic alkanes ...Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević. "The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments" in Journal of Serbian Chemical Society, Beograd : Srpsko hemijsko društvo (2013). https://doi.org/10.2298/JSC130614087S
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On the distribution modulo 1 of the sum of powers of a Salem number
Dragan Stankov (2016)It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "On the distribution modulo 1 of the sum of powers of a Salem number" in Comptes rendus Mathematique (2016). https://doi.org/10.1016/j.crma.2016.03.012
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Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine
Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...... example: λ1 = (a11·WRB1−N)+(a12·WMB1−N)+(a13·WSB1−N) WRB1−N = (1·0.1630)+(0.5·0.2968)+(0.33·0.5401) 0.1630 = 3.01492 λ2 = (a21·WRB1−N)+(a22·WMB1−N)+(a23·WSB1−N) WMB1−N = (2·0.1630)+(1·0.2968)+(0.5·0.5401) 0.2968 = 3.00825 λ3 = (a31·WRB1−N)+(a32·WMB1−N)+(a33·WSB1−N) WSB1−N = (3·0.1630)+(2·0.2968)+(1·0 ...
... specific example: _ (a11-Wrpi-n)+(412-Wopi-n)+(413-Wspi-n) __ (1-0.1630)+(0.5-0.2968) + (0.33-0.5401) __ A= = = 3.01492 Wrsi-N 0.1630 -Wrepi- -W; _ -Weopi— 2-0.1630 1-0.2968 0.5-0.5401 A> = (421:Wrpi-n)+(422-Wopi-n) +(423-Wsp1-N) ( )+( )+( ) 3.00825 Wupi_n 0.2968 -Wrpi- -W; _ -Wopi- 3-0.1630 2-0.2968 1-0 ...
... ranking of the R, M, S indicators is given for the new (B1-N, B2-N, and B3-N have the same ranking) and old machines. Table 6. The ranking of partial indicators of the availability of new and old machines. AHP Preferences B1-N (B2-N, B3-N) B1-O B2-O B3-O R M S R M S R M S R M S R 1 1/2 1/3 1 1 1 ...Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović. "Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine" in Energies, MDPI AG (2019). https://doi.org/10.3390/en12214044
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DNA/BSA interactions and cytotoxic studies of tetradentate N,N,O,O Schiff base copper(II) complexes
Aleksandar Mijatović, Angelina Caković, Aleksandar Lolić, Snezana Sretenović, Marko Živanović, Dragana Seklić, Jovana Bogojeski, Biljana Petrović (2023)Three Schiff base Cu(II) complexes, (N,N’-bis(acetylacetone)propylenediimine)copper(II) complex, [Cu(acac2pn)] (1), (N,N'-bis-(benzoylacetone)propylenediimine)copper(II) complex, [Cu(phacac2pn)] (2) and (N,N’-bis-(trifluoroacetylacetone)propylenediimine)copper(II) complex, [Cu(tfacac2pn)] (3), were used to investigate the interactions with calf thymus DNA (ct-DNA) and bovine serum albumin (BSA) using the electronic absorption and spectroscopic fluorescence methods. UV-Vis absorption studies showed that studied complexes interact with DNA molecule and exhibit moderate binding affinity. Fluorescence studies of complexes 1-3 also showed a possibility for DNA intercalation as well as a relatively high binding ability ...Aleksandar Mijatović, Angelina Caković, Aleksandar Lolić, Snezana Sretenović, Marko Živanović, Dragana Seklić, Jovana Bogojeski, Biljana Petrović. "DNA/BSA interactions and cytotoxic studies of tetradentate N,N,O,O Schiff base copper(II) complexes" in Journal of the Serbian Chemical Society (2023). https://doi.org/10.2298/JSC230614063M
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Some models for determination of parameters of the soil oscillation law during blasting operations
... Equation (4) into Equation (3), we obtain: v “ Kv ¨ ˝ 3 b 3¨Q 4¨π r ˛ ‚ n “ Kv ¨ ˜ 3 c 3 4 ¨ π ¸n ¨ ˆ 3 ? Q r ˙n “ Kv ¨ K1 ¨ ˆ r 3 ? Q ˙´n “ K ¨ ˆ r 3 ? Q ˙´n “ K ¨ R´n (5) where as: ˜ 3 c 3 4 ¨ π ¸n “ K1; Kv “ K K1 ; r 3 ? Q “ R (6) where: R—reduced distance is the distance ...
... marked ´n, meaning that: ∆v v ∆R R « ´n (7) Thereby it can be considered that: lim∆RÑ0 ∆v v ∆R R “ ´n, which means: dv v dR R “ ´n (8) Equation (8) can be written in the form: dv v “ ´n ¨ dR R , where by integration is obtained: ż dv v “ ´n ¨ ż dR R , namely: logv “ logR´n ` logC (9) ...
... (1) we obtain the equation: v “ v1 ¨ ˆ R1 R ˙n (14) From Equation (14), for R = R1 there is obtained v = v1 for any n, in our case n > 0. For R = Ri, i = 2, 3, ..., N, from Equation (14), we can take that: vi “ v1 ¨ ´ R1 Ri ¯n , i = 2, 3, ..., N, from there the relation is obtained: v1 ¨ v2 ...Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić. "Some models for determination of parameters of the soil oscillation law during blasting operations" in Energies, Basel, Switzerland : MDPI (2018). https://doi.org/10.3390/en9080617
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Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine
... obtained: 1 1 2 1 1 2 ... ... n N N N N R v v v v R R R (10) From the relation (10), we can determine parameter n. By logharithm operation of relation (10) we obtain: 1 21 1 2 1 ... log log ... N N N N v v vR n R R R v ...
... .. N N N N v v v v n R R R R (11) By the replacement of the value for the parameter n in the equation (11), found in this way, we obtain the relation for the oscillation velocity of rock mass in the monitored environment: 1 1 n R v ...
... obtain the equation: 1 1 n R v v R (9) From the equation (9), for R = R1 there is obtained v = v1 for any n, in our case n > 0. For R = R1, i = 2, 3, ..., N, from the equation (9), we can take that: 1 1 2,3,..., n i i R v v i N R ...Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine" in Underground Mining Engineering, Belgrade : University of Belgrade, Faculty of Mining and Geology (2015). https://doi.org/10.5937/podrad1526009L
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Rezultati probnog ispitivanja geotehničkih prenapregnutih sidara u Užicu (Stari grad)
Vladimir Kovačević (2024)Za potrebe izrade završnog rada na četvrtoj godini Rudarsko-geološkog fakulteta, studijskog programa Geotehnika, pod mentorstvom doc. dr Zorana Berisavljevića, odabrana je tema „Rezultati probnog ispitivanja geotehničkih prenapregnutih sidara u Užicu (Stari grad)“. Osnovni metodološki pristup koji je korišćen za rešavanje postavljenog problema predstavlja kabinetsko istraživanje dostupne dokumentacije, analiza i interpretacija rezultata izvedenih geoloških,geotehničkih i geomehaničkih istraživanja. Predstavljene su osnovne informacije,karakteristike i upotreba prednapregnutih geotehničkih sidara.Analiziran je tok testiranja granične nosivosti prednapregnutih sidara. Na osnovu izvršenih geotehničkih istraživanja terena i ispitivanja ...... M O H O N V 3O O N L L S S L L A L I O V d V O ĐONIMHVHH - Q O M I O H O N V Đ N L L S M . L / L I S O A I S O N M N Q I N V N M S O I S M L - V I V G I S f N V A L L I d S I I W O N T O H . L N O X O X I N S I d V Z Đ N I S S H N . L S H N H G G N V gauMn,LOniLLS ...
... A Y O H O N V O O N L L S I L L A.LIOVdV' O Đ N I D H V H H - Q 1 O D 0 i 1 O H O N V Đ N L L S ? L L / L L S O A I S O N M N N O I N V ? H D .LSŠLL – V M V G I S O f N V A L L I d S I T W O N T O H . L N O N M O M I N S I d V Z ĐNISSHNH.LSHNHd G N V SMMn.LOnbiLLS ...
... + i i = + - + ++ o 5 ( N O d d S r N a Z n O Z I - V1IS I N W H O V T I G ĐONISSiHHLSSHHd G N V g S d H n i O n H 1 I S HO34 H 3 1 N 3 O - S r N v V Z d H d v N G d b H d | 3 r I O 5 n H . L S N O y N VZ H V 1 L N 3 O B8B8B8BPEB8BSBBRB wl {v= CENTAR ...Vladimir Kovačević. Rezultati probnog ispitivanja geotehničkih prenapregnutih sidara u Užicu (Stari grad), 2024
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Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems
Dejan Ćebić, Nebojša M. Ralević (2021)Dejan Ćebić, Nebojša M. Ralević. "Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems" in Journal of Mathematical Chemistry, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10910-021-01253-3
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Towards Automatic Definition Extraction for Serbian
U radu su prikazani preliminarni rezultati automatske ekstrakcije kandidata za definicije rečnika iz nestrukturiranih tekstova na srpskom jeziku u cilju ubrzanja razvoja rečnika. Definicije u rečniku Srpske akademije nauka i umetnosti (SANU) korišćene su za modelovanje različitih tipova definicija (opisnih, gramatičkih, referentnih i sinonimskih) koje imaju različite sintaksičke i leksičke karakteristike. Korpus istraživanja sastoji se od 61.213 definicija imenica, koje su analizirane korišćenjem morfoloških e-rečnika i lokalnih gramatika implementiranih kao pretvarači konačnih stanja u paketu za obradu korpusa otvorenog ...... акушерка N в.бабица (accoucheuse N v. midwife) 2 (1) surname 3672 3670 (100%) Андрић N презиме (Andrić N surname) 3 (1) verbal noun 913 912 (100%) плакање N гл. им. од плакати (crying N verb. n. from to cry) 4 (3) type of 1435 1250 (87%) бисер N врста пенушавог вина (pearl N a kind ...
... 1575 (97%) ветрић N дем. и хип. од ветар; (small wind N dim. and hyp. of wind) 6 (1) first name or a nickname 914 857 (94%) Пачавра N лични надимак (Pačavra N personal nickname) 7 (3) women 596 483 (81%) бедевуша N танка, висока незграпна жена. (bedevuša N a thin, tall clumsy woman) ...
... Вечерњача N народни назив за планету Венеру (Večernjača N folk name of the planet Venus) 14 (1) collective nouns 103 101 (98%) браћа N зб. им. од брат (brothers N col. noun derived from brother) 15 (3) animals 2115 1564 (74%) арнаут N назив за помамна, љута коња; (arnaut N name for a ...Ranka Stanković, Cvetana Krstev, Rada Stijović, Mirjana Gočanin, Mihailo Škorić. "Towards Automatic Definition Extraction for Serbian" in Proceedings of the XIX EURALEX Congress of the European Assocition for Lexicography: Lexicography for Inclusion (Volume 2). 7-9 September (virtual), Democritus University of Thrace (2021)
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Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia
Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević. "Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia" in Marine and Petroleum Geology, Elsevier BV (2020). https://doi.org/10.1016/j.marpetgeo.2020.104252
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Одређивање резерви нафтног лежишта „Х“ методом материјал баланса
Александра Петровић (2024)Метода материјалног баланса је кључна техника у процени резерви нафте и гаса у лежиштима која омогућава системско прорачунавање доступних резерви. Циљ ове методе је да се прецизно израчунају количине флуида у лежишту на основу доступних PVT података, података о лежишту и производњи. Резултати примене методе материјалног баланса показују да је она ефикасна у пружању кавнтитативних процена, међутим њена тачност зависи од квалитета улазних података. Метода материјалног баланса пружа основу за процену резерви, али може бити подложна грешкама због непрецизности ...... JoOujeHe y HHTCPBAa]JIy tn-1 OJIHOCHO: CApn — (We)n-i(Pp)n (We)n = (W.)n-i + [(tp)a — (ta)n-il (Pp), — (tp)n_i(p5)n (58) Ine cy: C – Barn EnepniHreH-XypcToBa KOHCTaHTa BOJIČHOr yTOKa tp — Oc3J1HMCH3HOHAaJIHO BDCMC n — TDeHyTHH BpeČMeCHCKH KOpaK n-] — rpeTXojHH BpeMCHCKH KOpaK Apn – ykyrnHu najni ...
... 2019): • EKcHaH3HOHH pe;KHM: N=—_P— 3.27 BoiceAp ( ) • Pe»MHM pacTBopeHor raca: N„|B R, – Rs)B N= P[ 0+( p 5) g] (328) Bt — Bti • PeMM racHe Kame: N= NP[BO + (Rp _— RS)Bg] Bg (3.29) (B. – Ba) + mBii (T_ 1) gi • BojoHanopHH pe)KMM Oe3 racHe Kate: N _Np[BO+(Rp—RS)Bg]+WpBW—We (3.30) ...
... THIOueTaK KaO IIITO je IIpHka3aHO Ha CJIHIH . 37 | N E(„·•·Eu Canuka 4.8. Fy dynkuuju Eo+Ey (Okotie u Ikporo, 2019) • HenoaHara BenauuHHa racHe Kane m, N, G F = N|E, + mE„,| = NE, + mNE, (4.33) FE_ N+mN Fa 4.34 DN 3) Ine cy: F = N,|B, + (R, — R.)B,| (4.35) Eo = [(Bo — Boi) + (Rsi — ...Александра Петровић. Одређивање резерви нафтног лежишта „Х“ методом материјал баланса, 2024
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Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings
... Equation (4), in the Equation (3), we obtain: v = Kv 3 √ 3Q 4π r n = Kv· ( 3 √ 3 4π )n · ( 3 √ Q r )n = Kv·K1· ( r 3 √ Q )−n = K· ( r 3 √ Q )−n = K·R−n, (5) whereas: ( 3 √ 3 4π )n = K1; Kv = K K1 ; r 3 √ Q = R; (6) whereby: R—the reduced distance is the distance ...
... velocity of the soil v will decrease (increase) by approximately n% [8]. Indeed, for h = ± R 100 = ±1%R, from (12) we obtain: v ( R ± R 100 ) ≈ v(R)∓ n· R 100 · v(R) R , v ( R ± R 100 ) ≈ v(R)∓ n· v(R) 100 , v(R ± 1%R) ≈ v(R)∓ n%·v(R). (14) 3.3. Models to Determine the Parameters of Equation ...
... vm) the following relations are valid: vm = K·Rm −n, m = 1, 2, . . . , N, (15) Minerals 2018, 8, 70 6 of 18 from where we obtain the relation: v1·v2· . . . ·vs vs+1·vs+2· . . . ·v2s = Ks·(R1·R2· . . . ·Rs) −n Ks·(Rs+1·Rs+2· . . . ·R2s) −n , (16) i.e., relation: v1·v2· . . . ·vs vs+1·vs+2· ...Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić. "Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings" in Minerals, Basel : MDPI AG, Basel, Switzerland (2018). https://doi.org/10.3390/min8020070
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An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction
Dejan Ćebić, Nebojša Ralević, Marina Marčeta. "An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction" in Mathematical Communications (2020)
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A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)
Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenikaGordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević. "A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)" in Marine and Petroleum Geology, Elsevier BV (2021). https://doi.org/10.1016/j.marpetgeo.2021.105383
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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, modelovanje... two orthogonal stretches with different magnitude, but the same sign. 3 A P P L I C AT I O N : S T R A I N T Y P E F O R RO TAT I N G E L E M E N T S U N D E R D I F F E R E N T T Y P E S O F D E F O R M AT I O N As a first test, we apply our strain type classification to individual square elements that ...
... than missing material) should be directed to the corresponding author for the paper. A P P E N D I X A : S H A P E F U N C T I O N S F O R D E T E R M I N I N G T H E D I S P L A C E M E N T G R A D I E N T We use linear shape functions to determine the displacement gradient ∂u ∂X for quadrilaterals ...
... quadrilateral deformation and that described by F the elements should be chosen sufficiently small. A P P E N D I X B : P O L A R D E C O M P O S I T I O N O F T H E D E F O R M AT I O N G R A D I E N T I N 2 D Analytic solutions exist for the decomposition of the deformation gradient F into the rotation tensor ...Taco 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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Polyhedral characteristics of the cosalite-type crystal structures
Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus. "Polyhedral characteristics of the cosalite-type crystal structures" in The Canadian Mineralogist, Mineralogical Association of Canada (2019). https://doi.org/10.3749/canmin.1900017
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Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova
Zoran M. Štirbanović (2015-07-01)Rudarstvo, a u okviru njega i priprema mineralnih sirovina, se odlikuje složenošću tehnoloških procesa što je posledica velikog broja uticajnih parametara. Samim tim je potrebno biti veoma obazriv prilikom donošenja odluka u oblasti rudarstva. U cilju što efikasnijeg funkcionisanja procesa, moguće je primeniti različite metode koje služe za pojednostavljenje procesa odlučivanja. Jedna od takvih metoda jeste i teorija grubih skupova. Ona predstavlja relativno novu matematičku teoriju koja je pogodna za razumevanje nepreciznih i nepotpunih podataka kao i za otkrivanje ...rudarstvo, priprema mineralnih sirovina, teorija grubih skupova, višekriterijumsko odlučivanje, flotacijsko jalovište, flotacijski kolektor, flotaciona mašina... koji se sastoji od: - alternative a’ i a“ ako nije ispunjen uslov U2, ili - alternative a', a“, …, a(N) ako nije ispunjen uslov U1; a(N) je određeno relacijom Q(a(N)) - Q(a') < DQ za maksimum N (pozicija ovih alternativa u „bliskosti“). Zoran Štirbanović, DOKTORSKA DISERTACIJA: Modeliranje ...
... Flotacione mašine su uređaji u kojima se odvijaju svi elementarni procesi flotacijske koncentracije u trofaznom disperznom sistemu, počev od kolizije (sudara) vazdušnih mehurića sa mineralnim česticama, preko njihovog pripajanja za hidrofobne čestice i formiranja agregata „mineralna čestica – vazdušni ...
... vrednosti Si i Ri, i = 1, 2, …, n, prema relacijama: ( ) ( )∑ = −−−= n j iffijffwjS jji 1 */* ( ) ( )[ ]−−−= iffijffwR jjjji */*max gde je: wj težinski faktor kriterijuma, koji predstavlja relativnu značajnost kriterijuma. 3. Računanje vrednosti Qi, i = 1, 2, …, n, prema relaciji: Zoran ...Zoran M. Štirbanović. "Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-07-01)