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808 items

  • 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.

  • The Newton method for solving nonlinear equations based on aggregation operators

    Nebojša M. Ralević, Dejan Ćebić (2019)
    ... ′(α)[1+2c2en +3c3e2 n +4c4e3 n +o(e3 n)]. (9) Dividing (8) by (9) yields f (xn) f ′(xn) = [en + c2e2 n + c3e3 n +o(e3 n)][1+2c2en +3c3e2 n +4c4e3 n +o(e3 n)] −1 = en − c2e2 n +2(c2 2 − c3)e 3 n +o(e3 n), and x̃n = xn − f (xn) f ′(xn) = α+ c2e2 n +2(c3 − c2 2)e 3 n +o(e3 n). (10) Thus f ...
    ... α =−1, f6(x) = e−x2+x+2 −1, α =−1, f7(x) = lnx+ √ x−5, α = 8.30943..., Table 1: Numerical results for ANM N AN HN GN QN CN f x0 n N f COC n N f COC n N f COC n N f COC n N f COC n N f COC 1 0.1 10 20 1.9977 9 27 3.0014 6 18 3.0038 5 15 3.0537 10 30 3.0147 11 33 3.0017 1 2 5 10 1.9975 4 12 2.9884 ...
    ... ′(α) = f ′(α)[2c2en +3c3e2 n +4c4e3 n +o(e3 n)] = f ′(α)[2c2en +o(en)], y− f ′(α) = f ′(α)[2c2 2e2 n +4(c2c3 − c3 2)e 3 n +o(e3 n)], we get A( f ′(xn), f ′(x̃n)) = f ′(α)+ 1 2 ( f ′(α)[2c2en +3c3e2 n +4c4e3 n +o(e3 n)] + f ′(α)[2c2 2e2 n +4(c2c3 − c3 2)e 3 n +o(e3 n)] ) + 1 2 ( Axx( f ′(α) ...

  • A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice

    Nikola Lilić, Ivan Obradović, Ranka Stanković (2002)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper, we ...

  • The external aggregation Newton's method for solving nonlinear equations and applications

    Marija Paunović, Dejan Ćebić, Nebojša Ralević (2020)
    Њутнов метод, агрегациона функција, ред конвергенције
    ... dk+2e2 n + o(e2 n) ) · ( 1 + k+1 k dk+1en + k+2 k dk+2e2 n + o(e2 n) )−1 = en k ( 1 + dk+1en + dk+2e2 n + o(e2 n) ) · [ 1 − ( k+1 k dk+1en + k+2 k dk+2e2 n + o(e2 n) ) + ( k+1 k dk+1en + k+2 k dk+2e2 n + o(e2 n) )2 + o(e2 n) ] = en k ( 1 + dk+1en + dk+2e2 n + o(e2 n) ) · ...
    ... (k)(α) ek+2 n + o(ek+2 n )], = f (k)(α) k! [ek n + dk+1ek+1 n + dk+2ek+2 n + o(ek+2 n )]. (8) Similarly, f ′(xn) = f ′(α) + f ′′(α)en + f ′′′(α) 2! e2 n + ... + f (k)(α) (k − 1)! ek−1 n + f (k+1)(α) k! ek n + f (k+2)(α) (k + 1)! ek+1 n + o(ek+1 n ) = f (k)(α) (k − 1)! ek−1 n + f (k+1)(α) ...
    ... 2! f ′′(α)e2 n + ... + 1 k! f (k)(α)ek n + 1 (k + 1)! f (k+1)(α)ek+1 n + 1 (k + 2)! f (k+2)(α)ek+2 n + o(ek+2 n ) = 1 k! f (k)(α)ek n + 1 (k + 1)! f (k+1)(α)ek+1 n + 1 (k + 2)! f (k+2)(α)ek+2 n + o(ek+2 n ) = f (k)(α) k! [ek n + f (k+1)(α) (k + 1) f (k)(α) ek+1 n + f (k+2)(α) ...

  • Terenska nastava iz geofizike: Arheološki lokaliteti na području Trstenika

    Dragana Đurić, Jelena Vukčević, Dejan Vučković, Ivana Vasiljević, Vesna Cvetkov (2020)
    geofizika, geofizička istraživanja u arheologiji, arheologija u okolini Trstenika

  • Značaj geografske širine za lociranje uzročnika magnetnih anomalija kod prospekcije arheoloških lokaliteta

    Vesna Cvetkov (2020)

  • 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 polynomials
    ... 1−ε. It follows that τ= arccos(1−ε)/n or τ= arccos(−1+ε)/n so that (1) if t ∈ (τ,π/n−τ) then n sinnt > n sinnτ= n sin(arccos(1−ε)) →∞when n →∞. Therefore the claim follows immediately if we chose n1 = ⌈ B1 sin(arccos(1−ε)) ⌉ . (2) if t ∈ (0,τ) ⋃ (π/n−τ,π/n) then n2|cosnt | > n2|cosnτ| = n2 c ...
    ... chosen ¢ > 0 and n € N we determine T such that |cos(nt)| = 1—-e. It follows that t = arccos(1 — €)/n or tT = arccos(—1+e)/n so that (1) ift€ (t,2/n-T) then nsinnt > nsinnt = nsin(arccos(1—€)) — oo when n — oo. Therefore the claim follows immediately if we chose | snvarccost=ay | n= | > ] - sin(arccos(1 ...
    ... exists a cosine polynomial ∑N m=1 cos(nmθ) with the nm integral and all different so that the number of its real zeros in [0,2π) is O(N 9/10(log N )1/5) (here the frequencies nm = nm(N ) may vary with N ). However, there are reasons to believe that a cosine polynomial ∑N m=1 cos(nmθ) always has many ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)

  • Pseudo-linear combination of fuzzy metrics

    Nebojsa M. Ralević, Bratislav D. Iričanin, Dejan Ćebić (2024)
    fazi metrike, filtriranje slika
    ... of N”-1, we have N (ay...,an) = Nkfl(Nm*l(ap(l), ..:ydp(my)), -1 —1 N (ap(mi+1i)i---)Gp(m+na)) -ı NE (ap(aqna_id1)i---iGp(n))), where p is arbitrary permutation of set 1 = {1,...,n} and m + +nk = n. So, N'(a) = a, a2) = N(a,a), a = N(a"),a) = N(N(aya),a) = N*(a,a,a), a) = N(at),a) = N(NŽ(a ...
    ... aı < a»z Abi < b > N(axbi) < N(a>,bzy), for all ai,ap,bi,bi c |0,1}, then the norm is strict. DEFINITION 2.2. The power of the norm N is given by Ni(aao)=N(axa>), N”"(ai,....an.Gnyı)=N(N" (ay...,an),an+i) (n>2). DEPFINITION 2.3. The power of element (with respect norm N) a c |0,1]} is defined ...
    ... Clearly, T(a,a) < a, S(a,a) > a for all a c [0,1]. A norm N is an A4rchimedean norm if. _ N{(a,a) < a for all a c (0,1), for -norm N and for all a e (0,1), N(a,a) > a for t-conorm N. IFf N(a,a) = a for all a c |0,1}, then N is idempotent norm N. If, in the definition of the norm, instead of the axiom ...

  • 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
    ... even degree d ≥ 4, and there is n ∈ N, n ≥ 2 such that τn has the minimal polynomial Pn(x) = 1 + a1,nx + a2,nx2 + · · · + ad−1,nxd−1 + xd, which is also reciprocal of degree d, and satisfies the condition (1.2) |ad−1,n| > 1 2 ( d d − 2 ) ( 2 + d−2 ∑ k=2 |ak,n| ) . Notice that the condition ...
    ... an integer N such that (2.5) will be fulfilled for all n ≥ N ; (iii) we chose an ε > 0 such that if each of d − 2 unimodal roots of a Pn(x) is at the distance < ε in modulus of exactly one root of xd−2 + 1 then |ǫk| < ǫ, k = 1, . . . , d/2 − 1 is fulfilled in (2.3); (iv) we chose n ≥ N such that (2 ...
    ... which obviously depend on D, ti so that there are the functions Ak,n such that ak,n = Ak,n(D; t1, t2, . . . , tH), k = 1, 2, . . . , d − 1. For D fixed and for each H-tuple (t1,j1 , t2,j2 , . . . , tH,jH ) we calculate ak,n = Ak,n(D; t1,j1 , t2,j2 , . . . , tH,jH ), ji = 0, 1, . . . , m, and replace ...

  • 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 polynomials
    ... lim N→∞ 1 N card{n < N|L ≤ ‖nω + 1 2 ‖ ≤ R} = 2(R − L). Let K1 ≤ K be natural number such that Q −1 1 , Q −1 2 , . . . , Q −1 K1 are decreasing and Q −1 K1+1, Q −1 K1+2, . . . , Q −1 K are increasing. Now we can determine the repartition function f (x) = lim N→∞ 1 N card{n < N|{Q (cos(2πnω))} ...
    ... < NL < ||n@|| < R} =2(R—-L), N>oo 1 1 lim —card{n < N|L <||n =||n < NiL <|Ino+ >| N|{Q (cos(2mnw))} ...
    ... (cos(2πnω))} < x} = lim N→∞ 1 N card M ⋃ i=−M ( K1 ⋃ k=1 { n < N| arccos(Q −1 k (max(αk, i))) 2π ≤ ‖nω‖ ≤ arccos(Q −1 k (min(βk, i + x))) 2π } ⋃ K ⋃ k=K1+1 { n < N| arccos(−Q −1 k (max(αk, i))) 2π ≤ ‖nω + 1 2 ‖ ≤ arccos(−Q −1 k (min(βk, i + x))) 2π } ) = M ∑ i=−M K ∑ k=1 ...

  • 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 ...
    raspoloživost, fazi teorija, AHP višekriterijumska analiza, eksperska ocena, buldozer

  • 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 ...
    General Chemistry

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)

  • Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду

    главни и одговорни уредник Душан Поломчић (2016)
    Рударско-геолошки факултет

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)

  • 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 ...
    geotehnička istraživanja, prednapregnuta sidra, nosivost sidra, standard SIA V 191
    ... 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 ...

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone

  • Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems

    Dejan Ćebić, Nebojša M. Ralević (2021)
    нелинеарне једначине, поступци засновани на срединама, вишеструки корени,
    ... that u n = O(e n ) and t n = K + O(e n ), so when n → ∞, u n → 0 and t n → K. Therefore using Taylor’s expansion of J(t, u) about (K, 0) we get (11) u n = 1 m e n − c1 m2 e 2 n + c 2 1 (m + 1) − 2mc2 m3 e 3 n + m(3m + 4)c1c2 − 3m 2 c3 − (m + 1)2c 3 1 m4 e 4 n + O(e5 n ), (12) ...
    ... �)3 e3 n + O(e4 n ) ] , (14) t n =K [ 1 + �(m(� − 2) + �) m2(m − �) c1e n + �(B1c 2 1 + B2c2) 2m3(m − �)2 e 2 n + �(B3c 3 1 + B4c1c2 + B5c3) 6m4(m − �)3 e 3 n + O(e4 n ) ] , 1502 Journal of Mathematical Chemistry (2021) 59:1498-1519 _ C) 5 ci(m + 1) — 2me, 3 Uu, Mm n m2 n mm n ...
    ... + 2)2c 2 1 J22(K, 0) − 256K 4 c 4 1 J40(K, 0) ) ) e 4 n + O(e5 n ). (9)f (x) = f (m)(�) m! em n ( 1 + 4 ∑ i=1 cie i n + O(e5 n ) ) , (10)f �(x) = f (m)(�) (m − 1) em−1 n ( 1 + 4 ∑ i=1 m + i m cie i n + O(e5 n ) ) . Journal of Mathematical Chemistry (2021) 59:1498-1519 ...

  • Towards Automatic Definition Extraction for Serbian

    Ranka Stanković, Cvetana Krstev, Rada Stijović, Mirjana Gočanin, Mihailo Škorić (2021)
    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 ...