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154 items
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Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима
Radiša D. Đurić (2016-05-30)Оцена расположивости представља основну компоненту уинжењерском управљању опремом. Расположивост је свеобухватни концепткоји представља меру употребног квалитета техничких система, који садржичитаву серију парцијалних индикатора који се односе на време у раду ивреме у отказу система као и на његову функционалну погодност. Овадисертација даје структурну анализу парцијалних индикатора као и развојмодела њихове синтезе на ниво расположивости. Поменути подаци имајухибридни карактер (измерени и експертски добијени) и њихова интеграцијаи синтеза је остварена коришћењем фази пропозиције и фази закључивања.Овакав приступ омогућава оцену техничког система ...управљање опремом, инжењерство одржавања,расположивост, фази закључивање, прикупљање података, булдозер... ања, ефективност или ризик је непостојање стриктно дефинисаног математичког и концепцијског модела за њихово рачунање. У радовима [Wang, 2000; Wang и остали, 1995; Wang и остали, 1996; Ivezić и остали, 2008] је дефинисан модел, где се парцијални Докторска дисертација 111 индикатори представљају ...
... композиција се често користи у фази алгебри као синтезни модел [Ивезић и остали, 2008; Tanasijevic и остали, 2011; Tanasijević и остали, 2013; Wang и остали, 1995; Wang, 2000; Cai, 1996]. Идеја је да се укупна оцена (А) делимично изједначи са стварном, репрезентативном оценом. Ова оцена је идентификована као ...
... за кориснике), требало би да буде најбољи међу најлошијим [Ивезић и остали, 2008; Tanasijevic и остали, 2011; Tanasijević и остали, 2013; Wang и остали, 1995; Wang, 2000]. У првом случају је min-max, а другом max-min композиција. Овакав модел композиције практично представља и оптимизациони модел. На ...Radiša D. Đurić. "Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-05-30)
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Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering
Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)... Fćrid M. (2013) Characterization and optical study of phosphogypsum industrial waste. Studies im Chemical Process Technology, 1, 30-36. Hua S, Wang K. & Yao X. (2016) Developing high performance phosphogypsum- based cementitious materials for oil-well cementing through a step-by-step optimization ...
... rare earth elements from phosphogypsum using HCI, HNOy,, and H,SSO,. Hydrometallurgy, 166, 195–204. Zhou J., Sheng Z., Li T., Shu Z., Chen Y. & Wang Y. (2016) Preparation of har- dened tiles from waste phosphogypsum by a new intermittent pressing hydration. Ceramics International, 42, 7237–7245 ...Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić. "Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering" in Clay Minerals, Cambridge University press (2020). https://doi.org/10.1180/clm.2020.11
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Determination of Mechanical Properties of Altered Dacite by Laboratory Methods
This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...... 20. Brown, E.T.; Hoek, E. Underground Excavations in Rock; CRC Press: London, UK, 1980. 21. Tan, Y.-Y.; Zhang, K.; Yu, X.; Song, W.-D.; Wang, J.; Hai, C.-L.; Tan, Y.-Y.; Zhang, K.; Yu, X.; Song, W.-D.; et al. The Mechanical and Microstructural Properties of Composite Structures Made of a Cement-Tailing ...
... Composite Rock Material with respect to Shale Thickness Ratio and Moisture Content. Electron. J. Geotech. Eng. 2008, 13, 1–10. 5. Liu, J.; Wang, E.; Song, D.; Wang, S.; Niu, Y. Effect of rock strength on failure mode and mechanical behavior of composite samples. Arab. J. Geosci. 2014, 8, 4527–4539. ...Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović. "Determination of Mechanical Properties of Altered Dacite by Laboratory Methods" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11080813
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Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content
Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugsNina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović. "Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content" in Journal of Sol-Gel Science and Technology, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s10971-019-04925-4
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Testing the energy value of different types of coal by the method of active thermography
In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Testing the energy value of different types of coal by the method of active thermography" in 9th International Scientific Conference on Defensive Technologies, Belgrade, Serbia, 15-16 October 2020, The Military Technical Institute (2020)
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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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Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)
Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD... Pyrite and Arsenopyrite with High Energy-Resolution X-ray Absorption Spectroscopy. ACS Farth Space Chem. 2019, 3, 1905—1914. [CrossRef] 3. | Wang, Z.; Wang, Y.; Peng, E.; Zou, S.; Deng, T.; Lai, E; Ning, J.; Dong, G.; Xu, D. Micro-Textural and Chemical Fingerprints of Hydrothermal Cobalt Enrichment ...Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik. "Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)" in Crystals, MDPI AG (2023). https://doi.org/10.3390/cryst13020278
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Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia
This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...... Geostandards and Geoanalytical Research 19, 1–23. https://doi.org/10.1111/j.1751-908X.1995. tb00147.x Xiao X., Zhou T., White N., Zhang L., Fan Y., Wang F. & Chen X. 2018: The formation and trace elements of garnet in the skarn zone from the Xinqiao Cu-S-Fe-Au deposit, Tongling ore dis- trict, Anhui ...
... indicator of infil- tration metasomatism. Mineralogical Magazine 55, 357–365. https://doi.org/10.1180/MINMAG.1991.055.380.06 Zhai D., Liu J., Zhang H., Wang J., Su L., Yang X. & Wu S. 2014: Origin of oscillatory zoned garnets from the Xieertala Fe–Zn skarn deposit, northern China: In situ LA–ICP-MS evidence ...Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol. "Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia" in Geologica Carpathica, Central Library of the Slovak Academy of Sciences (2021). https://doi.org/10.31577/GeolCarp.72.1.2
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Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels
Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković. "Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels" in SPE Journal (2023)
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Просторни положај лежишта угља Ђурђевик: геофизичко-геолошки модел
Синиша Арсеновић (2019)Лежиште угља Ђурђевик представља источни део Бановићког угљеног басена и припада северној страни босанске офиолитске зоне унутрашњих Динарида у чији састав улазе стене палеозојске, мезозојске и кенозојске старости. Језерска доњомиоценска угљоносна серија изграђена је од лапоровито-глиновитих седимената са једним слојем мрког угља. Дебљина угљеног слоја креће се у интервалу од 5 до 25 m са генералним правцем пружања СЗ - ЈИ и падом према ЈЗ. У зони обухваћеноj геофизичким истраживањима изражена je пострудна тектоника у виду раседа мањег и ...... methods. Exploration Geophysics 31(3), 509-514. Wang, R. J., 1977. Adaptive predictive deconvolution of seismic data. Geophysical Prospecting 25(2), 342-381. Wang, Y., 2015. Frecquencies of the ricker wavelet. Geophysics 80(2), A31-37. Wang, Y., Rao, Y., 2009. Reflection seismic waveform tomography ...
... захваћени зоном одлагалишта, која је зарасла. Геодетска мерења, потребна за топографске - статичке корекције (Williamson, 1988; Steples, Miller, 1997; Wang, Rao, 2009; Arsenović et al., 2016) су вршена након спроведене 41 аквизиције дуж трасираних профила, на основу постављених маркера (нумерисаних ...
... Фреквенција геофона 28 Hz Геофонски интервал 10 m Интервал узорковања 0,5 ms Дужина снимка 0,8 s Аквизиција је вршена путем roll-along технике (Wang, 1977; Lainiotis et al., 1988; Gülünay, 2017), која представља начин примене рефлективне сеизмике тако што се активни диспозитив помера дуж трасе ...Синиша Арсеновић. Просторни положај лежишта угља Ђурђевик: геофизичко-геолошки модел, Београд : Рударско-геолошки факултет, 2019
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Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals
Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić (2020)As the number of poorly soluble drugs is increasing, nanocrystals have become very interesting due to wide range of application possibilities. Curcumin was used as a model active ingredient in this work. Even though it has many proven positive effects, due to its physicochemical issues, its possibilities have not been fully exploited. The goal of this work was to select optimal conditions for a top-down method for curcumin nanosuspension production, and to perform their comprehensive characterization applying complementary methodologies: ...Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić. "Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals" in Review on advanced materials science, Walter de Gruyter GmbH (2020). https://doi.org/10.1515/rams-2020-0043
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Advantages and challenges in presenting mathematical content using EDX platform
... UNESCO, 2007, pp. 27-63. [10] Gao, L., Yuan, K., Wang, Y., Jiang, Z., & Tang, Z. “The Math Retrieval System of ICST for NTCIR-12 MathIR Task”, In Proc. NTCIR-12, 2016, pp. 318-322. [11] Kohlhase, ...Marija Radojičić, Ivan Obradović, Ranka Stanković, Olivera Kitanović, Roberto Linzalone. "Advantages and challenges in presenting mathematical content using EDX platform" in The Seventh International Conference on e-Learning (eLearning-2016), Belgrade : Metropolitan University (2016)
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Hydrogeochemistry of Uranium in the Groundwaters of Serbia
Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić. "Hydrogeochemistry of Uranium in the Groundwaters of Serbia" in Uranium - Past and Future Challenges, Springer International Publishing Switzerland (2015). https://doi.org/10.1007/978-3-319-11059-2_89
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Multi-word Expressions for Abusive Speech Detection in Serbian
Ovaj rad predstavlja istraživanja na usavršavanju i unapređenju srpske verzije rečnika Hurtlex, višejezičnog leksikona uvredljivih reči. Posebnu pažnju posvećujemo dodavanju izraza sa više reči (polileksemskih jedinica) koji se mogu smatrati uvredljivim, jer su takvi leksički zapisi veoma važni za postizanje dobrih rezultata u mnoštvu zadataka otkrivanja uvredljivog jezika. Srpski morfološki rečnici se koriste kao osnova za čišćenje podataka i stvaranje rečnika. Istaknuta je veza sa drugim leksičkim i semantičkim resursima na srpskom jeziku i predviđena je izgradnja sistema za ...... resource for hate speech detection. They could be used as a baseline for comparison with more advanced methods since subtle hateful messages (Kwok and Wang, 2013), and language nuance cannot be detected accurately using this method. In addition, some insults which might be unacceptable to one group might ...
... Processing of Serbian – Automata, Texts and Electronic Dictionaries. University of Belgrade, Faculty of Philology, Belgrade. Irene Kwok and Yuzhou Wang. 2013. Locate the hate: Detecting tweets against blacks. In Proceedings of the twenty-seventh AAAI conference on artificial intelligence, pages 1621–1622 ...Ranka Stanković, Jelena Mitrović, Danka Jokić, Cvetana Krstev. "Multi-word Expressions for Abusive Speech Detection in Serbian" in Proceedings of the Joint Workshop on Multiword Expressions and Electronic Lexicons, Association for Computational Linguistics (2020)
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Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol InjectionMilica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)
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Development of integrated fuzzy model for mine management optimization
Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)... hierarchy process, Int. J. Prod. Econ., 97, 89-117. | CHEN H. (2006) Applications of Fuzzy Logic in Data Mining Process. In: Bai Y., Zhuang H., Wang D. (eds), Advanced Fuzzy Logic Technologies in Industrial Ap- ications, Advances in Industrial Control, London, Springer, DOT: 10.1007,978-1- 8 ...Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić. "Development of integrated fuzzy model for mine management optimization" in Comptes rendus de l'Académie Bulgare des Sciences (2023)
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Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)
Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeLjiljana Vasić, Saša Milanović, Anita Puskás-Preszner, Laszlo Palcsu. "Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)" in Environmental Earth Sciences, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s12665-020-08910-x
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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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Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete
Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija... Institute. Available online: https://www.americangeosciences.org/critical-issues/faq/what-are-the- dierent-types-of-coal (accessed on 30 May 2021). 5. Yu, J.L.; Tahmasebi, A.; Han, Y.N.; Yin, F.K.; Li, X.C. A review on water in low rank coals: The existence, interaction with coal structure and effects ...
... Carbonation of calcium sulfoaluminate cement blended with blast furnace slag. Cem. Concr. Compos 2021, 118, 103918. [CrossRef] 25. Liao, Y.; Jiang, G.; Wang, K.; Al Qunaynah, S.; Yuan, W. Effect of steel slag on the hydration and strength development of calcium sulfoalumi-nate cement. Constr. Build. Mater ...
... and Raman studies of the stabilization beta-Ca2SiO4. Ceramurgia international 1978, 4, 75. [CrossRef] 34. Zhang, G.; Li, Z.; Zhang, L.; Shang, Y.; Wang, H. Experimental research on drying control condition with minimal effect on concrete strength. Constr. Build. Mater 2017, 135, 194–202. [CrossRef] ...Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović . "Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete" in Minerals, MDPI (2021). https://doi.org/10.3390/min11090925
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Crystal structure of K3EuSi2O7
alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu... -3 http://www.mathnet.ru/links/df924f2db1305a2430f200e3f58341c7/dan30741.pdf 10 KOVAČ et al. 12. M. S. Hwang, H. Y.-P. Hong, M. C. Cheng, Y. Wang, Acta Cryst. C43 (1987) 1241 (https://doi.org/10.1107/S0108270187092308) 13. I. Vidican, M. Smith, M., H.-C. zur Loye, J. Solid State Chem. 170 ...Sabina Kovač, Predrag Dabić, Aleksandar Kremenović. "Crystal structure of K3EuSi2O7" in Journal of the Serbian Chemical Society, National Library of Serbia (2021). https://doi.org/10.2298/JSC210218026K