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849 items
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Application of machine learning for diagnosing the operation of a deep well pump in oil production
Maja Trikić (2024)This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost... tion process. The schema for classifying background logs used in this study is shown in Figure 6.9. Specialist Standard cards „ S 5 5 B B B E B B B E B B E E -f. „O F Store cards V I V I I I I I ) Card visualization Label cards Discard cards Figure 6.9. Classification and manual selection ...
... Continuous Wavelet Transform, described by equation (13). _ k-b Cw(s,b) = .J z(k)QC2-)dk (13) where: Cw(5, b)- is the result of the wavelet transform, Z(k)- is the signal being analyzed, iW)((k — b)/s)- is the wavelet function, s and b-scale and translation 54 The main difference between ...
... 12 b o ' Li L “ [] LJ ? LI vromoe (%5e0C}) Figure 3.1 time functions of load and stroke of the smooth rod Š·o i E PR N a a m e .'! ” L A_'A––––Ev @llšsss·zlll B dı | | | oO e % 2 «0 bl · tod glatko Sipko S(cm) Figure 3.2 Dynamograms of downhole pump operation: a})load, b)surface ...Maja Trikić. Application of machine learning for diagnosing the operation of a deep well pump in oil production, 2024
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Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia
Bojan Kostić, Pavle Tančić, Natalija Batoćanin. "Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia" in Geological Quarterly, septembar 2024, Polish Geological Institute - National Research Institute (PGI-NRI) (2024). https://doi.org/10.7306/gq.1752
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Fault type assessment based on vertical gravity gradient anomalies – advantages and limitations
The type of dip-slip faults can be assessed based on the analysis of vertical gravity gradients. Theoretically, just a simple comparation of the gradient extreme values can give us an answer whether the fault is normal or reverse (thrust). Practical application of this method is far more complicated and the results depend on a number of parameters, such as a complexity of geological setting, the quality of gravity data, dip angle and displacement of the fault, density contrast, etc. ...... 14 South Morava x [km] Fla FIb F2a F2b River F3 F4 i i vi < VOA - K i (b) s VOA V X V a \ c u Figure 3. Field example from South Morava trench: (a) vertical gravity gradient (Uzz) curves A, B and C and (b) disposition of the faults obtained from geological data (red dashed and full lines ...
... North Macedonia 3BOPHHK HA TPYJOBU PROCEEDINGS * a eS 4 e* - + BI bLAHIA ~ b. Seratimovski, T. & Boey, B. Oxpud, 2024 / Ohrid, 2024 TJloce6no us0aHue Ha Geologica Macedonica,M 6 MAKEJ/IOHCKO TEOJIOIHHKH JIPVIHITBO CKOTIJE 1952 MACEDONIAN ...
... Geologists of the Republic of North Macedonta 3BOPHMHK HA TPYVJIOBMH PROCEEDINGS ypeonuuu / Editors: Cepa()HMoBcku, T. & BoeB, B. Serafimovski, T. & Boev, B. Oxppin, 2024 / Ohrid, 2024 MHynraBau: MakeJIOHCKO TČOJIOHIKO JIpyITTBO IynaBHH H 0JIT0OBOpHu ype/iHuHiH IIpoQ. m-p Tonop Cep ...Ivana Vasiljević, Snežana Ignjatović, Branislav Sretković. "Fault type assessment based on vertical gravity gradient anomalies – advantages and limitations" in Vth Congress of the Geologists of the Republic of North Macedonia, Ohrid, Republic of North Macedonia, September 27-28, 2024, Macedonian Geological Society (2024)
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Numerical modeling of Selanac debris flow propagation using SPH code
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 ...... 15th-19th-2020 Figure 3 Final model of flow heights A) 16s B) 30s C) 50s D) 100s SCG-XIII INTERNATIONAL SYMPOSIUM ON LANDSLIDES. CARTAGENA, COLOMBIA- JUNE 15th-19th-2020 Figure 4 Erosion depths in meters in time steps A) 16 s B) 30 s C) 50 s D)100 s 5 CONCLUSIONS Final models show ...
... I., Mira, P., González, E., Haddad, B., Quecedo, M., Tonni, L., Drempetic, V. (2008) ‘’Mathematical, constitutive and numerical modelling of catastrophic landslides and related phenomena’’. Rock Mech Rock Eng 41:85–132. Pastor, M., Blanc, T., Haddad, B. et al. (2014). ‘’Depth Averaged Models ...
... which stands among the largest occurrence of this type of landslides recorded in Serbia, recently (Fig. 1). Figure 1 A) UAV image of main scarp B) UAV image of transportation zone The Selanac debris flow is a complex flow type landslide phenomenon, firstly triggered as slide of huge initial ...Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi . "Numerical modeling of Selanac debris flow propagation using SPH code" in SCG-XIII International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics And Geotechnical Engineering (2021)
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Analysis and visualization of geophysical well-logging data from closely spaced boreholes
Geophysical logging measurements for determining the condition of the rock mass on the dam profile and locating the predisposed directions of water circulation and loss from the reservoir were conducted in four boreholes distributed at a close distance. The survey was carried out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis ...Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov. "Analysis and visualization of geophysical well-logging data from closely spaced boreholes" in Vth Congress of the Geologists of the Republic of North Macedonia, Ohrid, Republic of North Macedonia, September 27-28, 2024, Macedonian Geological Society (2024)
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Fluid inclusion systematics in the Okoška gora polymetallic deposit
... the Sheet Slovenj Gradec. Federal Geological Survey Belgrade, 74 pp. Schmid, S. M., Fiigenschuh, B., Kounov, A., Matenco,L., Nievergelt, P.. Oberhinsli, R., Picuge Schefer, S., Schuster, R., Tomljenovič, B., Ustaszewski, K.. & van Hinsbergen, U. 3. J, 2 Tectonic units of the Alpine collision zone between ...
... Geologists ODDELEK ZA GEOLOGIJO Ljubljana 2021 јапак, M., Froitzheim, N., Luptak, B., Vrabec, M, & ultrahigh-pressure metamorphism of eclogites subduction in the Eastern Alps, Slovenia. • T. Linnemann, U., Ouzegane, K., Drareni, A ...
... Precambrian Research, 224, 236–278. Mioč, P. 1972: Basic Geological Map of Yugoslavia 1:100.000.5 to the Sheet Slovenj Gradec. Federal Geological Survey B Sigesmund,S., Oriolo, S., Heinrichs, T.. Basei, M. A. S., Nolte, N 2018: Provenance of Austroalpine basement metasedimenits: connections between p ...Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec. "Fluid inclusion systematics in the Okoška gora polymetallic deposit" in 25th meeting of Slovenian geologists, Ljubljana, 2021, Univerza v Ljubljani, Oddelek za geologijo (2021)
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An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)
N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero. "An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)" in Palaeogeography, Palaeoclimatology, Palaeoecology, Elsevier BV (2020). https://doi.org/10.1016/j.palaeo.2020.110145
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Multihazard Exposure Assessment on the Valjevo City Road Network
Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović (2019)Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović. "Multihazard Exposure Assessment on the Valjevo City Road Network" in Spatial Modeling in GIS and R for Earth and Environmental Sciences, Elsevier Inc (2019). https://doi.org/10.1016/B978-0-12-815226-3.00031-4.
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Nonequilibrium athermal random-field Ising model on hexagonal lattices
Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević. "Nonequilibrium athermal random-field Ising model on hexagonal lattices" in Physical Review E, American Physical Society (APS) (2021). https://doi.org/10.1103/PhysRevE.103.032147
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Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world
Bogoljub Vučković, Bojan Dimitrijević (2023)The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...... L., Grinstein M., Liu Y., Green K., Wai W., Wazed B., Shaw R., 2015 – Trace Metal Contamination in New Vork City Garden Soil - Soil Sci 180, Technical article 8. Chonokhuu S., Batbold C., Chuluunpurev B., Battsengel E., Dorjsuren B., Byambaa B., 2019 - Contamination and health risk assessment ...
... 00075100007512000751400075100007518000752000075220007523000 b) d) Figure 3. General view of the spatial distribution of 5 separate coal seams in the Kostolac-Kovin coal bearing basin – a) I (red dots) and I (pink dots) coal seams; b) II (black dots) coal layer; c) la coal layer; d) IP coal layer ...
... from coal, 45 from ash, 165 from gravel and 30 from soil, we perform analysis of horizontal and vertical distribution of HM and comparative analysis. B/hat interests us as authors and you as readers the most is - whether heavy metals from coal contaminate the accompanying sediments above and around ...Bogoljub Vučković, Bojan Dimitrijević. "Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world" in 9th International Conference Mining and Environmental Protection, 24–27. May 2023, Sokobanja, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet (2023)
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Чији је пример? Анализа лексичких обележја на примерима Речника САНУ
У овом раду поставља се питање: да ли се може утврдити ко је аутор неког текста уколико се анализирају искључиво његова лексичка обележја? Како бисмо покушали да добијемо одговор на ово питање, посматрали смо примере у оквиру речничког чланка појединачне лексеме Речника САНУ, који су забележени у пет томова (и то: I, II, XVIII, XIX и XX). Сваки пример је преузет из неког извора на шта упућују скраћенице, наведене у заградама. Од преко 5.000 понуђених извора, определили смо се ...... на примерима Речника САНУ Бранислава Б. Шандрих, Ранка М. Станковић, Мирјана С. Гочанин Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Чији је пример? Анализа лексичких обележја на примерима Речника САНУ | Бранислава Б. Шандрих, Ранка М. Станковић, Мирјана ...
... би ли. … 5. исказна, за означавање онога што је садржина основног исказа а. што, то што. … б. да ли; (2) (а) будућ и будући и будући св. узрочна, обично са свезом „да”: с обзиром на то што; пошто, јер. (б) већ1 везн.; вар. вет1, веће 1. супротно а. после одричног исказа: него; исп. а3 (1ђ), венг ...
... - The Repository is available at: www.dr.rgf.bg.ac.rs 811.163.41’322.2 811.163.41’373 https://doi.org/10.18485/msc.2019.48.3.ch13 Бранислава Б. ШАНДРИХ Филолошки факултет Универзитета у Београду Ранка М. СТАНКОВИЋ Рударско-геолошки факултет Универзитета у Београду Мирјана С. ГОЧАНИН ...Бранислава Б. Шандрих, Ранка М. Станковић, Мирјана С. Гочанин. "Чији је пример? Анализа лексичких обележја на примерима Речника САНУ" in Српски језик и његови ресурси, Међународни славистички центар, Филолошки факултет, Универзитет у Београду (2019). https://doi.org/10.18485/msc.2019.48.3.ch13
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Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji
Dragoslav Rakić (2013-05-10)U disertaciji su prikazani rezultati laboratorijskih ispitivanja uzoraka komunalnogotpada dobijeni u aparatima za direktno smicanje i edometarskim aparatima (jedanedometarski aparat konstruisan je za potrebe ove disertacije). Sva ispitivanja su izvršenana veštački pripremljenim uzorcima, uz uvažavanje preporuka koje se odnose nadimenzije korišćenih aparata i veličinu najvećih frakcija u uzorku (EN 1997-2, ASTM2007-a, 2007-b). Za formiranje uzoraka korišćen je komunalni otpad različite starosti,uzet sa dve deponije u Srbiji (Ade Huje u Beogradu i gradske deponije u Novom Sadu).Interpretacija rezultata dobijenih iz ...komunalni otpad, deponija, geotehnička klasifikacija, čvrstoća smicanja,deformabilnost, indeks primarne kompresije, indeks sekundarne kompresije, modelisleganja... poroznosti tokom nanošenja opterećenja po putanji AB je ln (ln ln )B A B B A A p e e e p p p λ λ ⎛ ⎞ = − = ⋅ = ⋅ −⎜ ⎟ ⎝ ⎠ (5.46) Promena koeficijenta poroznosti po putanji BD je ln (ln ln )e B D E B A A p e e e p p p κ κ ⎛ ⎞ = − = ⋅ = ⋅ −⎜ ⎟ ⎝ ⎠ (5.47) Ukupna zapreminska ...
... uzorke serije A Slika 7.28 Vremensko sleganje uzorka U-5 iz serije B Slika 7.29 Vremensko sleganje uzorka U-6 iz serije B Slika 7.30 Vremensko sleganje uzorka U-7 iz serije B Slika 7.31 Vremensko sleganje uzorka U-8 iz serije B Slika 7.32 Zavisnost napona i deformacija u fazi primarne kompresije ...
... parametra a b - parametar u funkciji razlike zapreminskih težina - inverzna vrednost parametra b predstavlja asimptotsku vrednost razlike zapreminske težine na velikoj dubini i na površini deponije. Vrednosti ovog parametra kreću se od b = 0 – 1 (m3/kN). Vrednosti parametara b za otpad blizu ...Dragoslav Rakić. "Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-05-10)
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Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji
Dragoslav Rakić (2013-05-10)U disertaciji su prikazani rezultati laboratorijskih ispitivanja uzoraka komunalnogotpada dobijeni u aparatima za direktno smicanje i edometarskim aparatima (jedanedometarski aparat konstruisan je za potrebe ove disertacije). Sva ispitivanja su izvršenana veštački pripremljenim uzorcima, uz uvažavanje preporuka koje se odnose nadimenzije korišćenih aparata i veličinu najvećih frakcija u uzorku (EN 1997-2, ASTM2007-a, 2007-b). Za formiranje uzoraka korišćen je komunalni otpad različite starosti,uzet sa dve deponije u Srbiji (Ade Huje u Beogradu i gradske deponije u Novom Sadu).Interpretacija rezultata dobijenih iz ...komunalni otpad, deponija, geotehnička klasifikacija, čvrstoća smicanja,deformabilnost, indeks primarne kompresije, indeks sekundarne kompresije, modelisleganja... poroznosti tokom nanošenja opterećenja po putanji AB je ln (ln ln )B A B B A A p e e e p p p λ λ ⎛ ⎞ = − = ⋅ = ⋅ −⎜ ⎟ ⎝ ⎠ (5.46) Promena koeficijenta poroznosti po putanji BD je ln (ln ln )e B D E B A A p e e e p p p κ κ ⎛ ⎞ = − = ⋅ = ⋅ −⎜ ⎟ ⎝ ⎠ (5.47) Ukupna zapreminska ...
... uzorke serije A Slika 7.28 Vremensko sleganje uzorka U-5 iz serije B Slika 7.29 Vremensko sleganje uzorka U-6 iz serije B Slika 7.30 Vremensko sleganje uzorka U-7 iz serije B Slika 7.31 Vremensko sleganje uzorka U-8 iz serije B Slika 7.32 Zavisnost napona i deformacija u fazi primarne kompresije ...
... parametra a b - parametar u funkciji razlike zapreminskih težina - inverzna vrednost parametra b predstavlja asimptotsku vrednost razlike zapreminske težine na velikoj dubini i na površini deponije. Vrednosti ovog parametra kreću se od b = 0 – 1 (m3/kN). Vrednosti parametara b za otpad blizu ...Dragoslav Rakić. "Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-05-10)
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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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BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties
Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition... Azuma, M.; Takano, M.; Tokura, Y. Magnetocapacitance effect in multiferroic BIMnOy. Phys. Rev. B 2003, 67, 180401. [CrossRef] 4. _ Wang,J.; Neaton, J.B.; Zheng, H.; Nagarajan, V.; Ogale, S.B.; Liu, B.; Viehland, D.; Vaithyanathan, V.; Schlom, D.G.; Waghmare, U.V.; et al. Epitaxial BiFeOa Multiferroic ...
... , D.S.; Srikanti, K.; Mannam, R.; Tiwari, B.; Mohan Kant, K.; Rao, M.S.R.; Singh, S. Photoactive Brownmillerite Multiferroic KBiFe2Os5 and Its Potential Application in Sunlight-Driven Photocatalysis. 4CS Omega 2018, 3, 16643—16650. [CrossRef] 20. Sum,B.; Zhou,G.;Sun, L.; Zhao, H.; Chen, Y.; Yang ...
... Magnetic, Dielectric and Ferroelectric Properties Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] ...Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković. "BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties" in Inorganics, MDPI AG (2023). https://doi.org/10.3390/inorganics11020051
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Automatic construction of a morphological dictionary of multi-word units
The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...electronic dictionary, Serbian, morphology, inflection, multiwordn units, noun phrases, query expansion... considered the strategy as partially successful; c) If for a given MWU none of the rules satisfied a) or b) we considered that the strategy failed for that MWU; d) For each lemma where either a) or b) applied, we also determined the rank of the accepted solution: the higher on the list of offered solutions ...
... (case a), partially successful results (case b) and failures (case c), and also indicates the rank of these results (rank 0 means no solution offered). A failure means that either no solution was offered or none of the solutions was classified as a) or b). In either case, the reason was that the strategy ...
... was 10 for nouns, and 3 for adjectives. Table 4. Evaluation of the strategy applied to the initial DELAC dictionary Rank Nouns Adjectives a) b) c) Total a) b) c) Total 0 5.50% 5.50% 2.93% 2.93% 1 63.74% 12.69% 6.28% 82.71% 37.56% 15.61% 53.17% 2 6.56% 0.62% 0.08% 7.26% 36.59% 4.39% 40.98% 3 2.22% 1 ...Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić. "Automatic construction of a morphological dictionary of multi-word units" in Lecture Notes in Computer Science 6233, Advances in Natural Language Processing, Proceedings of the 7thInternational Conference on NLP, IceTAL 2010, Reykjavik, Iceland, August 2010, Springer (2010): 226-237. https://doi.org/10.1007/978-3-642-14770-8_26
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Sinteza i strukturna karakterizacija mikroporoznih arsenata i fosfata
Sabina Z. Kovač (2015-09-28)Predmet rada i istraživanja ove doktorske disertacije su sinteza i strukturnekarakteristike novih kristalnih arsenata i fosfata koji sadrže Mg, K, Ca, Mn, Fe, Co, Ni,Cu, Zn, Sr, Ba i druge katjone. U strukturama arsenata i fosfata, AsO4- i PO4-tetraedrinajčešće se vezuju sa tetraedarski ili oktaedarski koordinisanim katjonima prelaznihmetala formirajući otvorene strukture (slojeve ili 3D mreže) sa širokim opsegomrazličitih topologija. U šupljinama ili porama u obliku povezanih ili nepovezanihkanala, tunela, kaveza i međuslojnog prostora mogu se ugraditi različiti vanmrežni joni(obično ...... Å c = 9,023 Å V = 451,65 Å3 a'≈ 2a b' ≈ 2a c' ≈ c V' ≈ 4V a' ≈ a‒b b' ≈ a+b c' ≈ c V' ≈ 2V a' ≈ a‒b b' ≈ a+b c' ≈ c V' ≈ 2V a' ≈ 2a b' ≈ c c' ≈ 2a V' ≈ 4V a' ≈ 2a‒2b b' ≈ 2c c' ≈ 2a γ ≈ 135 V' ≈ 8V a' ≈2a b' ≈ 2a c' ≈ 2c γ ≈ 90 V' ≈ 8V ...
... ćelije: a=14,719(6), b=14,734(5), c=17,891(6), γ=90,02(2) I2/b (br. 15_15) parametri ćelije: a=14,150, b=14,150, c=18,046, γ=90 S dmax.(Å) dav.(Å) Δ parametri ćelije: a=20,9098, b=17,8855, c=14,7913, β=134,842 C2/c (br. 15_1) parametri ćelije: a=20,011, b=18,046, c=14,150, β=135 ...
... grupa P42/n, br. 86) sa dvostruko većom ćelijom (a' ≈ a‒b, b' ≈ a+b, c' ≈ c, V' ≈ 2V), dok je rombična struktura ZnP (prostorna grupa Pcca, br. 54) izrazito pseudotetragonalna duž [010] sa četiri puta većom zapreminom ćelije (a' ≈ 2a, b' ≈ c, c' ≈ 2a, V' ≈ 4V) u odnosu na aristotip. U svim t ...Sabina Z. Kovač. "Sinteza i strukturna karakterizacija mikroporoznih arsenata i fosfata" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-09-28)
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Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia
Paleontology, Stratigraphy, Economic Geology, Geochemistry and Petrology, Geology, Geophysics, Geotechnical Engineering and Engineering Geology... KARAMATA, S., HAAs, J., PER0, CS., GRADINARU, E., GAWLICK, H.-J., GAETANI, M., MELLO, ]., POLAK, M., ALJINOVIĆ, D., OGORELEC, B., KOLAR-JURKOVŠEK, T., JURKOV- ŠEK, B. & BUsER, St. 2010. Triassic environments in the Geol. an. Balk. poluos., 2019, 80 (1), 17–27 Late Triassic radiolarians from ...
... GRADINARU, E., GAWLICK, H.-J., KARAMATA, S., HAAS, J., PER6, Cs., GAETANI, M., MELLo, ]., PoLAK, M., ALJINOVIĆ, D., OGORELEC, B., KOLAR-JURKOVŠEK, T., JURKOVŠEK, B. & BusER, St. 2011. Triassic Evolution of the Tecto- nostratigraphic Units ofthe Circum-Pannonian Region. Jahrbuch der Geologischen ...
... anc T) o -—— Pre-Senonian thrusting Fig. 1. a, Main tectonic units in the central part of Balkan Peninsula {modified after BRAGIN et al., 2018); b, Simplified geologic map ofthe wider investigation area {modified after DJERIĆ et al. 2012). Geol. an. Balk. poluos., 2019, 80 (1), 17–27 East Vardar ...Nikita Bragin, Liubov Bragina, Nevenka Đerić, Nataša Gerzina-Spajić. "Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia" in Geološki anali Balkanskoga poluostrva (2019). https://doi.org/10.2298/GABP1901017B
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Метода променљивих околина за решавање проблема p-центра са поузданом мрежом
У овом раду је разматран проблем p-центра са поузданом мрежом (енгл. Reliable p-center facility location problem - RpCFLP). Решавање проблема подразумева иницијално успостављање p ресурса и алокације корисника, као и накнадну реалокацију корисника у складу са новонасталим сценаријима који садрже информације о онеспособљеним ресурсима и осталим измењеним улазним подацима. За решавање посматраног проблема предложена је метахеуристика заснована на итеративној варијанти основне методе променљивих околина (енгл. Iterated basic variable neighborhood search - IBVNS). Резултати тестирања предложене метахеуристике указују на њену ...Јована Рађеновић, Стефан Мишковић, Оливера Станчић. "Метода променљивих околина за решавање проблема p-центра са поузданом мрежом" in 50. Међународни симпозијум о операционим истраживањима SYM-OP-IS, Тара, Србија, 18-21.9.2023, Београд : Медија центар „Одбрана” (2023)
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Specifičnosti izgradnje deonice 3 brze saobraćajnice Požarevac-Golubac na organskom tlu
Vojislav Lučić (2024)U ovom završnom radu prikazani su podaci koji se odnose na metode ojačanja terena izgrađenog od slabonosivog organskog tla, kao i njegove geotehničke karakteristike na primeru šireg istražnog prostora, u okolini sela Kumane duž trase treće dionice brze saobraćajnice Požarevac-Golubac. U radu su prvo prikazane osnovne karakteristike i podele organskog tla i treseta, zatim su navedene metode ojačanja tla koje mogu da se koriste na datom istražnom prostoru i na kraju je izvršena analiza i interpretacija rezultata geotehničkih istraživanja ...organsko tlo, treset, metode ojačanja slabonosivog tla, slieganje, konsolidacija i vremenski tok konsolidacije... koji zavisi od dužina Bi i B-,dubine z na kojoj se određuje prirast napona od dopunskog opterećenja i uglovi u i 02. Vrijednosti Bi, B>, ai 1 o su prikazane na slici 15 zajedno sa dijagramom sa kojeg se, na osnovu odnosa B /z ı B-/z, određuje uticajni faktor b (Das B. ı Sobhan K., 2014). 35 ...
... Kota Dubina bušotine X Y (mnm) (m) B -113 (IP) 7 537 539.8 4 954 735.0 68.40 12.0 7 537 864.2 4 954 955.9 B -114 (IP) 66.80 12.0 B 115 (IP) 7537 304.9 4 954 575.0 71.10 7.5 7 538 648.1 4 955 460.5 B -117 (IP) 66.60 12.0 7 538 805.8 4 955 525.3 B 1I8(IP) 67.30 15.0 B_ 60 (PGD) 7 538 189 ...
... preko sloja lošijih karakteristika. U tom smislu razlikujemo 4 osnovna tipa loma (slika 1). l· B, ·I Zona proboja Zona zamjene Li , · - ~ k { a) Opšti lom smicanja unutar sloja zamjene b) Lom probojem kroz sloj zamjene c) Opšti lom smicanja slabijeg sloja d) Lom probojem sloja zamjene ...Vojislav Lučić. Specifičnosti izgradnje deonice 3 brze saobraćajnice Požarevac-Golubac na organskom tlu, 2024