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Упит dcterms_subject_txt:geometric Brownian motion

63 items

  • Multi-Criteria Fuzzy-Stochastic Diffusion Model of Groundwater Control System Selection

    Dušan Polomčić, Zoran Gligorić, Dragoljub Bajić, Miloš Gligorić, Milanka Negovanović (2019)
    When considering data and parameters in hydrogeology, there are often questions of uncertainty, vagueness, and imprecision in terms of the quantity of spatial distribution. To overcome such problems, certain data may be subjectively expressed in the form of expert judgment, whereby a heuristic approach and the use of fuzzy logic are required. In this way, decision-making criteria relating to an optimal groundwater control system do not always have a numerical value. Groundwater control scenarios (alternatives) are identified through hydrodynamic ...
    expert judgment, linguistic variables, fuzzy dynamic TOPSIS, hydrogeology, groundwater control system, open-cast mine, geometric Brownian motion

  • Evaluation of Underground Zinc Mine Investment Based on Fuzzy-Interval Grey System Theory and Geometric Brownian Motion

    Gligorić Zoran, Kričak Lazar, Beljić Čedomir, Lutovac Suzana, Milojević J. (2014)

  • Prediction of blast-induced ground motion in a copper mine

    Lapčević Radojica, Kostić Srđan, Pantović Radoje, Vasović Nebojša (2014)

  • Stochastic nature of earthquake ground motion

    Kostić Srđan, Vasović Nebojša, Perc Matjaz, Toljić Marinko, Nikolić Dobrica (2013)

  • Application of structure from motion technique for engineering geological mapping of underground rooms

    Dragana Đurić, Branislav Sretković, Uroš Đurić, Zoran Radić, Dejan Vučković (2022)

  • Application of structure from motion technique for engineering geological mapping of underground rooms

    Uroš Đurić, Nenad Brodić, Zoran Radić, Dragana Đurić, Miloš Marjanović (2022)

  • Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements

    Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović (2020)
    The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...
    Pogon rotornog točka, habanje, rezni elementi, ANFIS

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...
    debris flow, modelling, SPH code, DEM
    ... 2020 1 INTRODUCTION Debris flows occur usually after saturated, mainly poorly sorted material, started to flow down the slope as a result of motion of solid and fluid phase. Different mechanisms, rheological and numerical models are used in this area of research. Generally, there are mainly ...
    ... set to 0.0001. Effects of pore water pressure were not included in this calculation. Plot screen of the final models are shown in Fig.3 The total motion of material from the main deposition zone further to Selanačka river valley is also depicted. Final results were compared with deposited material ...
    ... 502-513. Rickenmann, D. (1999) ‘’Empirical relationships for debris flows’’. Natural Hazards 19: 47-77. Savage, S.B., Hutter, K. (1989). ‘’The motion of a finite mass of granular material down a rough incline’’. Journal of Fluid Mechanics 199 (1): 177-215. Takahashi, T. (2007). ‘’Debris Flow: ...

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... to withstand the loads during both the downward and upward strokes. Additionally, the horsehead must convert the rotational motion of the motor into the translational motion needed for the movement of the smooth rod. Thirdly, the horsehead must convert the motor speed into the desired pumping speed ...
    ... mounted and can be adjusted to achieve the balancing effect. • Horsehead Arm, which connects and converts the rotational motion of the lever arm into the translational motion of the balance beam and the smooth rod. • Gearbox, which serves to convert a relatively high number of revolutions of ...
    ... results. API is the result of electrical analog computer studies of sucker rod motion. This predated the numerical solution of the wave equation and was not as general. However, the analog study did describe the motion of sucker rods and the forces carried by the rods. The original work was for ...

  • Prognoza operativne efikasnosti aktivnog podzemnog rudnika zasnovana na teoriji sivih sistema

    Svetlana M. Štrbac-Savić (2016-06-10)
    Efikasnost predstavlja preduslov za opstanak svake rudarske kompanije, posebno u uslovima izuzetno konkurentnog trţišnog okruţenja kao što je to rudarska industrija. Efikasnost oznaĉava sposobnost kompanije da ispuni svoje kratkoroĉne ili dugoroĉne ciljeve. Operativna efikasnost se definiše kao odnos izmeĊu ulaznih parametara potrebnih za odvijanje proizvodnje i pokazatelja dobijenih proizvodnjom. U kontekstu rudarskog poslovanja, operativna efikasnost se odnosi na vreme potrebno da se mineralno dobro transformiše u novĉana sredstva. Visoka operativna efikasnost se postiţe kada se ostvari prava kombinacija karakteristika ...
    podzemni rudnik, operativna efikasnost, prognoza, teorija sivih sistema, stohastiĉke diferencijalne jednaĉine, simulacija
    ... variables affecting them. Estimation of future revenues is based on the applicationofmean reversion process, normal and uniform distribution. Geometric Brownian motion is used to define future values of production costs. Values of ore production rate, fixed costs, working days, and degree of use of production ...
    ... Implications for Valuation and Hedging‖, The Journal of Finance, Vol. 52, No. 3, pp.923-973, 1997. 88 [SIGMAN06] Karl Sigman, Geometric Brownian motion, 2006. http://www.columbia.edu/~ks20/FE-Notes/4700-07-Notes-GBM.pdf [ STANKOVIĆ14] M. Stanković, Stohastičke diferencijalne jednačine ...
    ... u Beogradu-Rudarsko-geološki fakultet, Beograd, 2008. 86 [KARATZAS91] Ioannis Karatzas and Steven E. Shreve Springer-Verlag, Brownian Motion and Stochastic Calculus, New York Second Edition, 1991. [KAYACAN10] Erdal Kayacan, Baris Ulutas, Okyay Kaynak, Grey system theory- based models ...

  • GNSS Time Series as a Tool for Seismic Activity Analysis Related to Infrastructure Utilities

    Sanja Tucikešić, Ankica Milinković, Branko Božić, Ivana Vasiljević, Mladen Slijepčević (2021)
    GNSS, Time series, Seismic deformations, Earthquake, Infrastructure utilities

  • From DELA Based Dictionary to Leximirka Lexical Database

    Biljana Lazić, Mihailo Škorić (2020)
    In this paper, we will present an approach in transforming Serbian language Morphological dictionaries from a DELA text format to a lexical database dubbed Leximirka. Considering the benefits of storing data within a database when compared to storing them in textual documents, we will outline some of the functionality that the database has made possible. We will also show how hand-made rules that use category labels lexical entries are marked with can be used to link lexical entries. ...
    Morfološki rečnici, jezički resursi, Leksimirka
    ... derivational entries will be illustrated with gender motion for surnames. Entries “ Škorić” (Škorić,N28+NProp+Hum+Last+SR) and “ Škorićka” (Škorićka,N661+GM+NProp+Hum+Last+SR+BASE=Sxkoricx\_N28+DerivAut) were connected using surname gender motion (_ka) derivational relation based on the rule that ...
    ... expressed. Derivative relations include those that link derivationally linked lexical entries. These types of relationships include: surname gender motion, e.g. “Škorić” and “Škorićka”, verbal nouns from verbs, e.g. “cvetanje” from “cve- Infotheca Vol. 19, No. 2, December 2019 91 Lazić B., Škorić ...
    ... Škorić” and “ Škorićka”. The lemmas are connected only if both are marked with "+Last" (for surname) and the second lemma has a "+GM" marker (gender motion) in DELAS dictionaries. More about these procedures can be read in the paper (Stanković et al., 2018). Relations are defined through the relationship ...

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... widespread in Jurassic times on the Adriatic margin. Their age determination, stratigraphy, and facies are important for the reconstruction of tectonic motion and the arrangement of palaeo­oceanic basins and continental blocks. Due to the highly complicated structure of this territory, each palaeontological ...
    ... be estimated to be in the interval from the ?Bajocian to Bathonian-Oxfordian. The new biostratigraphic data clearly show the onset of tectonic motion in the Middle Jurassic, documented by the presence of mass trans- port deposits intercalated in the radiolarite successions. This suggests a Middle ...
    ... the formation (GAWLICK et al., 2017). The newly deter­ mined biostratigraphic ages based on radiolarian faunas clearly show the onset of tectonic motion in the Middle Jurassic, docu­ mented by the deposition of mass transport deposits intercalated in thick radiolarite successions. This suggests the ...

  • Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija

    Srđan D. Kostić (2013-11-04)
    U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...
    potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja
    ... state, suppressing, in that way, fault motion, and, consequently, the seismic activity. On the other hand, frictional strength parameter c only destabilizes the block motion in Carlson-Langer model, by inducing the onset of periodic or quasi-periodic motion. Regarding the periodic perturbation ...
    ... performed for the strong ground motion recordings at three different mines in Poland: copper mines Rudna and Legnic-Glogov and coal mine Upper Silezia. In all the examined cases, the results of the analysis indicated that the time series of strong ground motion in north-south and vertical direction ...
    ... stress change and fault reactivation is of primary importance for the motion dynamics along the fault. It is necessary to emphasize that the apparent incompatibility between the stochastic nature of the strong ground motion during the seismic event and its model of nucleation could be explained ...

  • Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija

    Srđan D. Kostić (2013-11-04)
    U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...
    potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja
    ... state, suppressing, in that way, fault motion, and, consequently, the seismic activity. On the other hand, frictional strength parameter c only destabilizes the block motion in Carlson-Langer model, by inducing the onset of periodic or quasi-periodic motion. Regarding the periodic perturbation ...
    ... performed for the strong ground motion recordings at three different mines in Poland: copper mines Rudna and Legnic-Glogov and coal mine Upper Silezia. In all the examined cases, the results of the analysis indicated that the time series of strong ground motion in north-south and vertical direction ...
    ... stress change and fault reactivation is of primary importance for the motion dynamics along the fault. It is necessary to emphasize that the apparent incompatibility between the stochastic nature of the strong ground motion during the seismic event and its model of nucleation could be explained ...

  • Tectonothermal evolution of an asymmetric extensional system: the Juhor Mts in Central Serbia (Northern Serbomacedonian massif)

    Miloš Radonjić, Uroš Stojadinović, Elco Luijendijk, Dejan Radivojević, Željko Golubović, Nikola Vuković (2018)
    асиметрична екстензија, панонски басен, српско‐македонски масив, термохронологија
    ... setting of the Pannonian Basin argue for the internal deformation of  principal tectonic units constituting the basement of the basin, rather than motion along the boundaries  of large‐scale fully rigid blocks (Bada et al., 2007). The Juhor Mts in central Serbia represent an inselberg  of Proterozoi ...

  • A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment

    Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others (2020)
    Aligning senses across resources and languages is a challenging task with beneficial applications in the field of natural language processing and electronic lexicography. In this paper, we describe our efforts in manually aligning monolingual dictionaries. The alignment is carried out at sense-level for various resources in 15 languages. Moreover, senses are annotated with possible semantic relationships such as broadness, narrowness, relatedness, and equivalence. In comparison to previous datasets for this task, this dataset covers a wide range of languages ...
    lexical semantic resources, sense alignment, lexicography, language resource
    ... become clogged; to become loaded or encumbered, as with extraneous matter. clog.v.03 impede the motion of, as with a chain or a burden to encumber or load, especially with something that impedes motion; to hamper. clog.v.01 become or cause to become obstructed to coalesce or adhere; to unite in ...
    ... in a mass. clog.v.06 fill to excess so that function is impaired to obstruct so as to hinder motion in or through; to choke up; . clog.v.04 impede with a clog or as if with a clog to burden; to trammel; to embarrass; to perplex. clog.v.05 coalesce or unite in a mass Figure 1: Sense provided ...

  • 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)
    Klizišta, Monitoring, GNSS, Geodetska osmatranja, UAV snimci, PSInSAR
    ... Activities on Landslide … 227 UAV Imaging and Mapping Using of small Unmanned Aerial Vechiles (UAV) systems and its implementation in Structure from Motion (SfM) photogrammetry is found very practical for landslide surface modeling and monitoring. Many advantages of UAV-based remote sensing for landslide ...
    ... Materijali I Konstrukcije 49(1–2):46–59 ((in Serbian)) Peppa MV, Mills JP, Moore P, Miller PE, Chambers JE (2017) Brief communication: landslide motion from cross correlation of UAV-derived morphological attributes. Nat Hazards Earth Syst Sci 17:2143–2150 Perissin D (2016) Interferometric SAR m ...

  • Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides

    Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)
    oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem
    ... southwestern corner (Figs. 1b, 2, 9). In situations when the indenter geometry and relative plate motion are distributed in such a way that the lateral margin of the indenter is oblique to the plate motion, the deformation is transferred from frontal shortening to large-scale transpressive deformation ...
    ... Arabian margin (Fig. 11d) is accommodated by transpressive East Anatolian Fault (margin oblique to plate motion) and strike-slip to transtensive Dead Sea Fault (margin parallel to plate motion; see Lyberis et al., 1992; Perinçek and Çemen, 1990; Smit et al., 2010). 7. Conclusions To understand ...
    ... of the Balkanides shortening transfer to Cerna and Timok strike-slip deformation during oroclinal bending around the Moesia. The relative plate motion in cases of the Moesian and Indian indentation and their associated Vrancea and SE Asiaslab retreats are perpendicular to the frontal and parallel ...

  • Influence of DEM resolution on numerical modelling of debris flows in RAMMS - Selanac case study

    Jelka Krušić, Biljana Abolmasov, Mileva Samardžić Petrović (2019)
    Debris flows induced by intensive rainfall represent very hazardous phenomena in many parts of the World. Methods for prediction of runout distance of flow like mass movements are different and depending on the input data, rheology, and available or appropriate numerical solution. However, sometimes it is not easy to obtain pre event and post event high-resolution data in the rural or mountainous area. Thus, the topology of terrain is the most important input parameter for the every real case ...
    tecišta, modeliranje, RAMMS, DEM
    ... 11. - 13. Oct, 2017 Rickenmann D (1999) Empirical relationships for debris flows. Natural Hazards 19: 47-77. Savage SB, Hutter K (1989) The motion of a finite mass of granular material down a rough incline. Journal of Fluid Mechanics 199 (1): 177-215. Schraml K, Thomschitz B, Mcardell BW ...