Претрага
730 items
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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 case-study on social and public administration aspects on mineral deposits safeguarding in chosen European countries
Andrzej Gałaś, Alicja Kot-Niewiadomska, Vladimir Simić, Michael Tost, Linda Wårell, Slávka Gałaś (2023)Law, Management, Monitoring, Policy and Law, Economics and Econometrics, Sociology and Political ScienceAndrzej Gałaś, Alicja Kot-Niewiadomska, Vladimir Simić, Michael Tost, Linda Wårell, Slávka Gałaś. "A comparative case-study on social and public administration aspects on mineral deposits safeguarding in chosen European countries" in Resources Policy (2023). https://doi.org/10.1016/j.resourpol.2023.103863
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Генеза хидротермалног Cu-Au система Чукару Пеки (Источна Србија)
Милош Велојић (2021)Главни циљ испитивања хидротермалног система Чукару Пеки је разумевање процеса који су довели до његовог настанка, а посебно еволуције рудоносних флуида из којих је настала рудна минерализација. Утврђено је да је овај систем настао у периоду пре 86,78 - 85,19 Ma из магматског интрузива који је био богат водом и имао висок оксидативни потенцијал. Током хлађења, из овог магматског интрузива су издвојени веома врели флуиди, који су имали температуре изнад 600°С и висок салинитет. У ...Борска металогенетска зона, Тимочки магматски комплекс, порфирска лежишта, високосулфидациона лежишта, флуидне инклузије, рудне парагенезе, геохронологија, хидротермалне алтерације, LA-ICP-MS... Кварцна жица. CP096 FMTC1327 Кварцна жица типа Б. CP105 FMTC1328 Кварцна жица типа Б. CP106 FMTC1328 Кварцна жица типа Б. CP108 FMTC1328 Љубичаста анхидритска жица. CP110 FMTC1328 Љубичаста анхидритска жица. CP116 FMTC1328 Кварцна жица типа Б. CP123 FMTC1328 Кварцна жица и љубичаста анхидритска ...
... Жице типа Б Жице типа Д Сулфидне жице Анхидритске жице 496,49 38,11 38,27 80,21 0 100 200 300 400 500 600 Жице типа Б Жице типа Д Сулфидне жице Анхидритске жице 405,63 10,13 1081,17 282,73 0 200 400 600 800 1000 1200 Жице типа Б Жице типа ...
... калијске алтерације из порфирског дела система Чукару Пеки. A) Калијска алтерација везана за кварцну жицу типа Б, FMTC1327 1246,5 m; Б) Калијска алтерација око кварцних жица типа А и Б, FMTC1327 953,7 m В) Фотомикрографија (пропуштена светлост) калијске алтерације везанe за кварцне жице TC160125 ...Милош Велојић. Генеза хидротермалног Cu-Au система Чукару Пеки (Источна Србија), Београд : [М. Велојић], 2021
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Mineralogical Discrimination between Authentic and Recent Imitations of Pottery Manufacture in Zlakusa, Serbia
... Mineralogical Discrimination between Authentic and Recent Imitations of Pottery Manufacture in Zlakusa, Serbia M. Milošević1, M. Logar1 & B. Đorđević2 1 Faculty of Mining and Geology, University of Belgrade, Đušina 7, Belgrade, Serbia 2National Museum in Belgrade, Trg Republike 1a, ...
... al study of clays from Dobrodo, Serbia, for use in ceramics, Clay Minerals, 1-9. doi:10.1180/clm.2019.49 [2] Milošević M., Logar M. & Djordjević B. (2020) Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery. Clay Minerals, 55, 142–149 ...Maja Milošević, Mihovil Logar, Biljana Đorđević. "Mineralogical Discrimination between Authentic and Recent Imitations of Pottery Manufacture in Zlakusa, Serbia" in Nordic Clay Meeting/3rd Symposium Clays & Ceramics 2021, The Latvian Clay Science Society (2021)
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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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An oilfield in Libya: A new model to enhance waste water disposal
Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković. "An oilfield in Libya: A new model to enhance waste water disposal" in Energy & Environment (2016)
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Flyrock induced by blasting in surface mining
Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac (2022)Miniranje predstavlja i dalje najefikasniji i najjeftiniji način eksploatacije velikih količina čvrstih mineralnih sirovina na površinskim kopovima. Energija eksplozije se koristi za fragmentaciju čvrste stenske mase do zahtevane granulacije. Pored pozitivnih efekata miniranja, postoje i određeni neželjeni efekti svakog procesa miniranja koji se mogu javiti, a to su: potresi tla, razletanje komada stene, vazdušni udari, otrovni i zagušljivi gasovi i prašina. Razletanje komada stene je nekontrolisano izbacivanje fragmenata odminirane stenske mase i predstavlja jedan od glavnih izvora materijalne štete ...Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac. "Flyrock induced by blasting in surface mining" in Rudarski glasnik, Beograd : Rudarski institut (2022). https://doi.org/10.25075/BM.2022.05
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Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina
Tina Dašić, Ljiljana Vasić (2020)Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry,Global and Planetary ChangeTina Dašić, Ljiljana Vasić. "Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina" in Environmental Earth Sciences, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s12665-020-08987-4
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Петролошке и техничке карактеристике амфиболита Потконџила (Теслић)
Srećković-Batoćanin Danica, Vasković Nada, Radulović Silvana, Matović Vesna, Stević Miodrag. "Петролошке и техничке карактеристике амфиболита Потконџила (Теслић)" in Зборник радова - Књига сажетака/1. Конгрес геолога у Босни и Херцеговини са међународним учешћем, Tuzla, 21.– 23.10.2015. године, :Удружење/удруга геолога у Босни и Херцеговини (2015): 106-109
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Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit
... parameter n, the La- grange’s theorem will be used, which states: Let f(x) be a function continuous to [a,b] and differentiable on an interval (a, b). Then there is at least one c, a < c < b, for which it is: cf ab afbf . In this case, given that the velocity is continuous, decreasing and ...
... određivanje parametra n koristi- ćemo Lagranžovu teoremu koja glasi: Neka je funkcija f(x) neprekidna na [a,b] i diferencijabilna u intervalu (a, b). Tada postoji bar jedno c, a < c < b, za koje je: cf ab afbf . U našem slučaju, s obzirom da je brzina oscilovanja neprekidna, opadajuća i ...
... Belgrade, pp. 199. [3] Simeunović D,.(1985): Mathematics, Faculty of Mining and Geology – Mining Department, Belgrade pp. 102- 103. [4] Ivanović B., (1973): Theoretical Statistics, Naučna knjiga, Belgrade, pp. 90 (in Serbian). [5] Simonović V., (1995): Introduction to the Theory of Probability ...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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Optimisation of underground mine decline development system using genetic algorithm
... 130) (surface mine truck) (4) (919;733;100) Ore reserve Building Orebody A 1,320,422 t Decline (equal for all sections) 2,200 USD/m Orebody B 223,060 t Surface section of transportation 600 USD/m Orebody C 560,811 t Orebody D 540,155 t Slope of decline and surface transport section ...
... 1474; 653 919; 733 1300; 1900 0 200 400 600 800 1000 1200 1400 1600 1800 2000 0 250 500 750 1000 1250 1500 1750 Ore body A Ore body B Ore body C Ore body D MPF Optimisation of underground mine decline ... ...
... 878.38 4.5 down SBP-UMCP 519 1,500 260 1,648 984 177 1,244.10 6.6 down UMCP-Ore body A 1,648 984 177 1,160 1,229 200 546.53 4.2 up UMCP-Ore body B 1,648 984 177 1,556 1,072 160 128.44 13.3 down UMCP-Ore body C 1,648 984 177 1,474 653 130 376.89 12.5 down UMCP-Ore body D 1,648 984 177 919 733 ...Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović. "Optimisation of underground mine decline development system using genetic algorithm" in Underground mining engineering, Beograd : Univerzitet u Beogradu – Rudarsko–geološki fakultet (2014)
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Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine
Lazar M. Kaluđerović (2018-01-17)fikasnost prilikom sorpcije S-metolahlora i klomazona od strane neorganskih iorganski modifikovanih montmorionita sa lokaliteta Bogovina odreĎena je metodombach adsorpcije. Uzorci montmorionita su tretirani prvo rastvorom NaCl a zatim irazličitim koncentracijama organskih kompleksa. Adsorpcione izoterme su dobijenetretiranjem uzoraka različitim koncentracijama herbicida. Detaljna mineraloškakarakterizacija uzoraka uraĎena je metodom rendgenske difrakcije. Rezultati interakcijemontmorionita sa organskim kompleksima i herbicidima dobijeni su primenomrendgenskih, optičkih, termičkih i spektroskopskih metoda.Na osnovu rezultata rendgenskih ispitivanja uzoraka, utvrĎeno je prisustvoorganskih kompleksa i herbicida u meĎuslojnom prostoru montmorionita.Montmorioniti modifikovani ...adsorpcija, montmorionit, heksadeciltrimetilamonijum bromid,feniltrimetilamonijum hlorid, S-metolahlor, klomazon... NH4+ koji zauzimaju poloţaj izmenljivog katjona: H+— glina + B = BH+— glina NH4 +— glina + B = BH+— glina + NH3 2) Voda koja je vezana za izmenljive metalne katjone: [M(H2O)x] n+ + B = [MOH(H2O)x-1] (n-1)+ + BH+ ...
... Lj., Nikolić V. M., Milić A. D., Gajić A. M., Djuričić A. M., Branković T. B., Martinović R. P., Tomašević R. M., Dumić B. M., Ţivanović D. V., Skendţić M. Đ., Opačić D. M., Andrić D. Lj., Krstović S. P., Matejević A. B., Domaće nemetalične mineralne Sirovine za primenu u privredi. Poglavlje u ...
... 31: 262–271. He H., Zhou Q., Frost R. L., Wood B. J., Duong L. V., Kloprogge J. T. 2007. A X-ray photoelectron spectroscopy study of HDTMAB distribution within organoclays. Spectrochimica Acta Part A, 66: 1180–1188. Hedley C. B., Yuan G. and Theng B. K. G. 2007. Thermal analysis of montmorillonites ...Lazar M. Kaluđerović. "Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-01-17)
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Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)
Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović. "Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)" in Challenges : Sustainable Land Management – Climate Change, Advances in Geoecology 43, Catena Verlag GMBH (2014)
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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 ...... 25/j=2, 1/j=3, 0.25/j=4, 0/j=5); (7) - good = (0/j=1, 0/j=2, 0.25/j=3, 1/j=4, 0.25/j=5); - excellent = (0/j=1, 0/j=2, 0/j=3, 0.25/j=4, 1/j=5); B. Questionnaire, statistical processing Employees operating with the bulldozers or connected to their maintenance and logistic are asked to field in ...
... grades (given as linguistic variables) [4]. TABLE I. QUESTIONNAIRE FOR ASSESSMENT OF AVAILABILITY INDICATORS A n a ly st N o . A v a il a b il it y in d ic a to r Questionnaire: Bulldozer Liebherr – Drmno Open Pit Mine Grade: Excellent Good Average Adequate Poor The degree ...
... of 33%. The lowest level of availability has the Drs-D machine. The availability is evaluated as “poor” and “adequate” in extent of 30%. Figure 4.b shows the mean value of availability for all three types of machines. It is noted that the Catерillar is generally rated with "excellent" and "good" ...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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Linear-motor plunger pump increases lifting efficiency
Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev. "Linear-motor plunger pump increases lifting efficiency" in Oil & Gas Journal (2022)
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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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Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia
Pavle Tančić, Aleksandar Kremenović (2022)Four macroscopically visible B–E (rim) zones, within a large natural ferric grossular garnet of Grs58–64Adr36–42 Sps2 composition, are described by means of Rietveld refinements of the crystal structures in a series of six space groups, followed by com parative analysis of the R-values, site occupancy factors, and bond lengths and angles. The garnet crystallized in the rhombohedral R63c space group. Various polyhedral distortions and structural or derdis or dervariations between the zones studied are also described and discussed. The ...Pavle Tančić, Aleksandar Kremenović. "Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia" in Geological Quarterly, Polish Geological Institute - National Research Institute (PGI-NRI) (2022). https://doi.org/10.7306/gq.1639
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Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal
Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)... oC (b), 450 oC (c) and 500 oC (d)., Figure S2: TICs of liquid products obtained by HDPE pyrolysis in the open system at 400 oC (a), 450 oC (b) and 500 oC (c), Figure S3: TICs of aliphatic fractions of liquid products obtained by lignite/HDPE co-pyrolysis in the open system at 400 oC (a), 450 oC (b) and ...
... (a), 450 oC (b) and 500 oC (c), Figure S7: Mass fragmentograms m/z (170 + 184 and 178 + 192) of aromatic fractions of liquid products obtained by pyrolysis in the open system at 500 oC; lignite (a, c), lignite/HDPE mixture (b, d), Figure S8: TGA-FTIR thermograms of lignite (a), HDPE (b) and lignite/HDPE ...
... obtained by pyrolysis in the open system at 500 oC; lignite (a), HDPE (b), lignite/HDPE mixture (c), Figure S5: TICs of aromatic fractions of lignite EOM (a), and liquid products obtained by lignite pyrolysis in the open system at 400 oC (b), 450 oC (c) and 500 oC (d), Figure S6: TICs of aromatic fractions ...Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović. "Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal" in Polymers, MDPI AG (2021). https://doi.org/10.3390/polym13050759
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Kontaktni metamorfizam gornjokrednih sedimentnih stena Rudnika
Kostić N. Bojan (2021)Kontaktni metamorfizam gornjokrednih sedimentnih stena na planini Rudnik ispitivan je na uzorcima iz pet bušotina. Definisano je šest varijeteta krednih stena (protolita) koji čine dve litološke jedinice izgrađene od klastičnog, karbonatnog i klastično-karbonatnog materijala. Vulkanskom aktivnosti na Rudniku formirana su vulkanska tela koja se utiskuju duž slojevitosti sedimentnih stena, a neka ih presecaju u vidu dajkova. Starost ovog vulkanskog događaja određena je na 23.9 miliona godina. Ovaj miocenski vulkanizam doveo je do kontaktno metamorfnih promena sedimentnih stena i obrazovanja skarnova ...... karbonata i serpentinita. 28 Slika 16: Polimiktni metakonglomerati; na slikama A i B su metakonglomerati koji su izgrađeni dominantno od valutica serpentinisanih peridotita (Srp), na slici B se vidi praškasti magnetit (Mag) zaostao nakon alteracije peridotitskog odlomka. Na slici C mogu ...
... (slika 51, B). Sa dijagrama se takođe može uočiti da zbir katjona Fe, Mg i Al raste, dok sadržaj Ca opada sa povećanjem dubine. Slika 51: Dijagram odnosa zbira katjona Fe3+, Al3+ i Mg2+ prema Ca2+ u amfibolima. Grupu A predstavljaju amfiboli iz metaklastita, dok su u grupi B amfiboli iz hornfels ...
... najnižim temperaturama egzistirao samo hlorit (polje 16 na slici 53, A i B). Slika 53: (A) Termobarometrijski dijagram izabranog uzorka skarna 269 sa nanetim izopletama. Polje stabilnosti mineralnih faza prikazano je brojem 12. (B) Izograde epidota i hlorita, mineralnih faza koje „ulaze“ u sastav skarnova ...Kostić N. Bojan. Kontaktni metamorfizam gornjokrednih sedimentnih stena Rudnika, Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2021
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Keyword Extraction from Parallel Abstracts of Scientific Publications
... inter- section of a set of keywords annotated by a human (A) and a set of keywords annotated using algorithm (B) divided by the number of keywords annotated using the algorithm: P = A ∩ B B . (1) The recall is calculated as the number of keywords in the intersection of a set of keywords annotated by ...
... I., Lazić, B., Trtovac, A.: Rule-based auto- matic multi-word term extraction and lemmatization. In: Proceedings of the 10th International Conference on Language Resources and Evaluation, LREC 2016, Por- torož, Slovenia (2016). ISBN 978-2-9517408-9-1 15. Stanković, R., Krstev, C., Lazić, B., Vorkapić ...
... s. - The Repository is available at: www.dr.rgf.bg.ac.rs Keyword Extraction from Parallel Abstracts of Scientific Publications Slobodan Beliga1(B), Olivera Kitanović2, Ranka Stanković2, and Sanda Martinčić-Ipšić1 1 Department of Informatics, University of Rijeka, Radmile Matejčić 2, 51 000 Rijeka ...Slobodan Beliga, Olivera Kitanović, Ranka Stanković, Sanda Martinčić-Ipšić . "Keyword Extraction from Parallel Abstracts of Scientific Publications" in Sematic Keyword-Based Search on Structured Data Sources - Third International KEYSTONE Conference, IKC 2017 Gdańsk, Poland, September 11–12, 2017 Revised Selected Papers and COST Action IC1302 Reports, Springer (2017)