Претрага
2357 items
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Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude
Ivana M. Jovanović (2016-01-13)U oblasti procesa prerade rude, flotacijska koncentracija predstavlja jednu od najznačajnijih i najčešće primenjivanih metoda separacije korisnih od nekorisnih minerala. Samim tim, veoma je važno osigurati uspešan rad flotacijskog postrojenja kroz dostizanje zadovoljavajućih tehno-ekonomskih pokazatelja. Cilj upravljanja procesom flotacijske koncentracije je upravo optimizacija kvaliteta i iskorišćenja korisne komponente u koncentratu uz maksimizaciju profita. Shodno tome, istraživanja na polju modelovanja i upravljanja ovim procesom zauzimaju značajno mesto u praksi kontolnog inženjenringa.Teorijska istraživanja u okviru doktorske disertacije obuhvatila su analizu položaja ...flotacijska koncentracija, modelovanje, upravljanje, inteligentni sistem, soft kompjuting, fazi logika, veštačke neuronske mreže... Minerals Engineering 19, pp. 531–538 312. Yianatos J.B., 2007. Fluid flow and kinetic modelling in flotation related processes columns and mechanically agitated cells - a review. Trans IChemE, Part A, Chemical Engineering Research and Design, Vol.85 (A12), pp. 1591–1603 313. Yianatos, J., Contreras ...
... Principles under Turbulent Flow Conditions. PhD Thesis, Virginia Polytechnic Institute and State University, Blacksburg, 95 p. 260. Singh, A., Louw, J.J., Hulbert, D.G., 2003. Flotation stabilization and optimization. The Journal of The South African Institute of Mining and Metallurgy, November 2003 ...
... making in machining processes. Computers in Industry 43, pp. 31–41 70. Flintoff, B., 2002. Introduction to Process Control. Mineral Processing Plant Design, Practice and Control, Vol. 2 (Edited by A.L. Mular, D.N. Halbe and D.J. Barrat), pp. 2051–2065 71. Forbes, G. 2007. Texture and bubble size measurements ...Ivana M. Jovanović. "Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-01-13)
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Long-lived Radioactive Elements and REE as Fingerprints of Deep Groundwater Flow
Marina Ćuk Đurović, Maja Todorović, Igor Jemcov, Petar Papić. "Long-lived Radioactive Elements and REE as Fingerprints of Deep Groundwater Flow" in EGU General Assembly 2021, EGU (2021)
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Pregled hidrodinamičkih istraživanja bunara sa horizontalnim drenovima numeričkim metodama
U radu je predstavljen pregled odabranih hidrodinamičkih istraživanja realizovanih primenom numeričkih metoda simulacije kretanja podzemnih voda pod uticajem rada bunara sa horizontalnim drenovima. Na osnovu pristupa u matematičkom i hidrauličkom tretiranju, kao i numeričkoj simulaciji bunara sa horizontalnim drenovima na modelima, predstavljeni su najznačajniji aspekti izrade hidrodinamičkih modela ovog kompleksnog tipa vodozahvatnog objekta. Metodologija obuhvata izbor: a) graničnih uslova za simulaciju prirodnih granica, izvora prihranjivanja i dreniranja izdani; b) primenjivanog stepena diskretizacije prostora obuhvaćenog modelom u planu i profilu; ...horizontalni bunari, hidraulika bunara, analitički modeli, numerički modeli, hidrodinamičko modeliranje podzemnih vodaĐorđije Božović, Dušan Polomčić, Dragoljub Bajić. "Pregled hidrodinamičkih istraživanja bunara sa horizontalnim drenovima numeričkim metodama" in Vodoprivreda, Srpsko društvo za odvodnjavanje i navodnjavanje (2020)
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Volume flow measurement of bulk solids on conveyor belts
Aleksandrović Snežana, Damnjanović Vesna. "Volume flow measurement of bulk solids on conveyor belts" in Transport & Logistics - International Journal 13 no. 27, Košice, Slovakia:Faculty of Mining and Geology, Belgrade, BERG Faculty, Košice (2013)
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Surface functional groups and degree of carbonization of selected chars from different processes and feedstock
Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS... applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were cho- sen to cover a wide range of chemical composition and structural ...
... x 50 mm, P/N 053942) and a Dionex” IonPac” AS15 IC (4 x 250 mm, P/N 053940) as guard and analytical columns. The mobile phase was 38 mM KOH with a continuous flow rate of 1 ml min . In addition, the column temperature was 30 "C, the conductivity cell temperature 35 "C and the suppressor current ...
... Many different ways of technical realizations exist for all of the processes mentioned above, including the use of microwave [14,15] and solar heating [16]. Some of the processes are optimized for the produc- tion ofliquid and gaseous fuels with biochar as a by-product [17], others are optimized ...Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann. "Surface functional groups and degree of carbonization of selected chars from different processes and feedstock" in PLOS ONE (2022). https://doi.org/10.1371/journal.pone.0277365
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Parallel Bidirectionally Pretrained Taggers as Feature Generators
In a setting where multiple automatic annotation approaches coexist and advance separately but none completely solve a specific problem, the key might be in their combination and integration. This paper outlines a scalable architecture for Part-of-Speech tagging using multiple standalone annotation systems as feature generators for a stacked classifier. It also explores automatic resource expansion via dataset augmentation and bidirectional training in order to increase the number of taggers and to maximize the impact of the composite system, which ...Ranka Stanković, Mihailo Škorić, Branislava Šandrih Todorović. "Parallel Bidirectionally Pretrained Taggers as Feature Generators" in Applied Sciences, MDPI AG (2022). https://doi.org/10.3390/app12105028
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Hydrogeochemical characterization of the regional groundwater flow systems in Southern part of Pannonian Basin (Serbia)
Maja Todorović, Marina Ćuk Đurović, Igor Jemcov, Petar Papić. "Hydrogeochemical characterization of the regional groundwater flow systems in Southern part of Pannonian Basin (Serbia)" in International Symposium on Geofluids. 7-9 July 2021 – virtual event, Joseph and Elizabeth Toth Hydrogeology Chair Foundation (2021)
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Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases
Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić. "Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases" in Chemical Papers, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s11696-021-01884-5
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Application of the VIKOR Method for Selecting the Purpose of Recultivated Terrain after the End of Coal Mining
Radmila Gaćina, Sanja Bajić, Bojan Dimitrijević, Tomislav Šubaranović, Čedomir Beljić, Dragoljub Bajić (2024)Radmila Gaćina, Sanja Bajić, Bojan Dimitrijević, Tomislav Šubaranović, Čedomir Beljić, Dragoljub Bajić. "Application of the VIKOR Method for Selecting the Purpose of Recultivated Terrain after the End of Coal Mining" in Proceedings of the Bulgarian Academy of Sciences, Bulgaria, 28. maj 2024 , Prof. Marin Drinov Publishing House of BAS (Bulgarian Academy of Sciences) (2024). https://doi.org/10.7546/CRABS.2024.07.10
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A survey of greenhouse gases production in central European lignites
Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)... Chojnacka, A., Blaszczyk, M.K., 2017. Anaerobic digestion: I. A com- mon process ensuring energy flow and the circulation of matter in ecosystems. II. A tool for the production of gaseous biofuels. Fermentation Processes. InTech https:// doi.org/10.5772/64645. Stepniewska, Z., Pytlak, A., 2008. Methanotrophic ...
... may lead to the restoration of anaerobic conditions in the deposit and the re- activation of processes the lead to the formation of potent GHG, i.e., CH4, CO2 and N2O. Here, we hypothesize that GHG formation occurs in aban- doned and submerged lignites. We also aim to recognize the GHG pro- duction potential ...
... measures the abundance of oxidized and re- duced chemical substances and enables the prediction of what electron acceptors are available for biogeochemical processes (Fiedler et al., 2007). Redox potential is tightly related with the activity of microbial communities (Fig. 2) and in general, Eh values are positively ...Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska. "A survey of greenhouse gases production in central European lignites" in Science of The Total Environment, Elsevier (2021). https://doi.org/10.1016/j.scitotenv.2021.149551
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Novi model za postizanje optimalne proizvodnje na naftnom polju Amal
Elnori Elmabrouk Ali Elhaddad (2015-04-16)Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...... al Journal of Multiphase Flow, 37, 671– 694. 85 Ariweriokuma, S. (2008), Political Economy of Oil and Gas in Africa, the Routledge Studies in International Business and the World Economy, Taylor & Francis. ASPO - Association for the study of peak of oil and gas (2011), www.peakoil.net ...
... Issue 1, 378-385. Gravel Packing and Sand Control, Developments in Petroleum Science, Volume 26, 1989, Pages 699-842. Guerrero-Sarabia I., Fairuzov Y.V. (2013) Linear and non-linear analysis of flow instability in gas lift wells, Journal of Petroleum Science and Engineering, In Press, Accepted ...
... ceramic membrane and application to the cross flow microfiltration of soluble waste oil, Mater. Lett, 52, 266–271. Leila V., Kamran G., Moslem F.(2012) Influence of key parameters on crude oil desalting: An experimental and theoretical study, Journal of Petroleum Science and Engineering, Volumes ...Elnori Elmabrouk Ali Elhaddad. "Novi model za postizanje optimalne proizvodnje na naftnom polju Amal" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-04-16)
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Novi model za postizanje optimalne proizvodnje na naftnom polju Amal
Elnori Elmabrouk Ali Elhaddad (2015-04-16)Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...... al Journal of Multiphase Flow, 37, 671– 694. 85 Ariweriokuma, S. (2008), Political Economy of Oil and Gas in Africa, the Routledge Studies in International Business and the World Economy, Taylor & Francis. ASPO - Association for the study of peak of oil and gas (2011), www.peakoil.net ...
... Issue 1, 378-385. Gravel Packing and Sand Control, Developments in Petroleum Science, Volume 26, 1989, Pages 699-842. Guerrero-Sarabia I., Fairuzov Y.V. (2013) Linear and non-linear analysis of flow instability in gas lift wells, Journal of Petroleum Science and Engineering, In Press, Accepted ...
... ceramic membrane and application to the cross flow microfiltration of soluble waste oil, Mater. Lett, 52, 266–271. Leila V., Kamran G., Moslem F.(2012) Influence of key parameters on crude oil desalting: An experimental and theoretical study, Journal of Petroleum Science and Engineering, Volumes ...Elnori Elmabrouk Ali Elhaddad. "Novi model za postizanje optimalne proizvodnje na naftnom polju Amal" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-04-16)
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The ‘Umka’ landslide
We present an in-depth landslide map of the ‘Umka’ landslide near Belgrade, Serbia, at a scale of 1:5000. The map delineates elements at risk, primarily buildings and road infrastructure impacted by the landslide displacements of several cm per year, introduced during frequent reactivation stages. The Main map results from a survey of over 350 buildings and more than 7 km of state and local roads. The acquisition techniques included engineering geological field mapping, building survey, and visual interpretation of ...rizik od klizišta, elementi rizika, kartiranje pomoću drona, ispitivanje objekata, geotehnički monitoringUroš Đurić, Dragana Đurić, Miloš Marjanović, Biljana Abolmasov, Ivana Vasiljević. "The ‘Umka’ landslide" in Journal of Maps, Informa UK Limited (2024). https://doi.org/10.1080/17445647.2024.2418580
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Development of an integrated model for open-pit-mine discontinuous haulage system optimization
Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović . "Development of an integrated model for open-pit-mine discontinuous haulage system optimization" in Sustainability, MDPI (2024). https://doi.org/10.3390/su16083156
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Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове
Јелка Крушић (2023)Тецишта су комплексне појаве нестабилности које захтјевају истраживања и испитивањакоја до сада нису рађена код нас у области геотехнике. По механизму, начину активирањаи понашању покренутог материјала се знатно разликују од клизишта. Циљ оведисертације је била примјена нумеричких модела пропагације тецишта на примјеру двијепојаве које су се десиле у Србији као посљедица дјеловања циклона Тамара. Детаљноистраживање тецишта подразумијева теренско картирање, теренска истраживања илабораторијска испитивања одабраних узорака са терена. Од теренских истраживања напримјеру тецишта Селанац урађена су геофизичка истраживања Електричнетомографије док ...тециште, нумерички модели пропагације, циклон Тамара, геофизичка истраживања, лабораторијска испитивања, Селанац, Лева река, RAMMS, SPH geoflow, реолошки моделЈелка Крушић. Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове, Београд : Универзитет у Београду, Рударско - геолошки факултет, 2023
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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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Prilog poznavanju režima i bilansa voda reke Resave
Sliv Resave zauzima područje između reke Velike Morave i obronaka Kučajsko-beljaničkih planina. Sliv i režim ove reke kontroliše se dvema hidrološkim stanicama: Manastir Manasija (slivno područje u iznosu od 388 km2) i Svilajnac (681 km2). Za potrebe analize režima voda reke Resave i uticaja padavina na formiranje oticaja sa njenog sliva preuzeti su podaci o padavinama sa meteorološke stanice Crni Vrh (1037 m nm) koji odslikava režim gornjeg dela sliva ove reke, i meteorološke stanice Smederevska ...Marina Mitrašinović, Vesna Ristić Vakanjac, Saša Milanović, Ljiljana Vasić, Dušan Polomčić. "Prilog poznavanju režima i bilansa voda reke Resave" in Zbornik radova XVI Srpski hidrogeološki simpozijum sa međunarodnim učešćem, Zlatibor, 2022., Univerzitet u Beogradu, Rudarsko-geološki fakultet (2022)
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The analysis of the geothermal energy capacity for power generation in Serbia
Jana Stojković, Goran Marinković, Petar Papić, Mihailo Milivojević, Maja Todorović, Marina Ćuk (2013)... sec- ondary side of the heat exchanger and evaporates, and steam is used to rotate the turbine in the conventional Rankine cycle electricity generation plant. After the vapourized binary fluid has passed and transmitted its energy to the turbine, it condenses and is fed back for use in the heat exchanger ...
... separated from the closed loop working fluid used in the turbine by a heat exchanger. The hot water gives up its heat in the heat exchanger to a working fluid with a low boiling point and high vapour pressure at low temperatures when compared to steam. The working fluid is usually ammonia or some organic ...
... has an additional advantage that the fluid (mostly salt water from ocean or polluted water from aquifer and hot rocks) never comes into contact with the turbine generator units [16]. Binary cycle power plants are a latest development; they operate with the fluid temper- atures as low as 57 °C [17] ...Jana Stojković, Goran Marinković, Petar Papić, Mihailo Milivojević, Maja Todorović, Marina Ćuk. "The analysis of the geothermal energy capacity for power generation in Serbia" in Thermal Science, National Library of Serbia (2013). https://doi.org/10.2298/TSCI120215033S
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Geotehnički aspekti izgradnje transfer stanice „Prelići“ u Čačku
Rakić Dragoslav, Basarić Irena, Janković Jovana, Bogdanović Snežana, Djurić Tina. "Geotehnički aspekti izgradnje transfer stanice „Prelići“ u Čačku" in International conference – Konferencija: Otpadne vode, komunalni čvrsti otpad i opasan otpad, Brzeće: (2018): 174-178
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Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III)
M. Misz-Kennan, J. Kus, D. Flores, C. Avila, Z. Büçkün, N. Choudhury, K. Christanis, J.P. Joubert, S. Kalaitzidis, A.I. Karayigit, M. Malecha, M. Marques, P. Martizzi, J.M.K. O'Keefe, W. Pickel, G. Predeanu, S. Pusz, J. Ribeiro, S. Rodrigues, A.K. Singh, I. Suárez-Ruiz, I. Sýkorová, N.J. Wagner, D. Životić (2020)Self-heating of coal waste is a major problem in the leading coal-producing and consuming countries, independent of the recent or past coal exploitation history. The phenomenon of self-heating is dependent on many factors such as the properties of organic matter (maceral composition and rank), moisture and pyrite content, climate effects, and storage conditions (shape of the dump or compaction of the coal waste). Once deposited, coal waste undergoes oxidation, which can lead to self- heating with the overall temperatures ...M. Misz-Kennan, J. Kus, D. Flores, C. Avila, Z. Büçkün, N. Choudhury, K. Christanis, J.P. Joubert, S. Kalaitzidis, A.I. Karayigit, M. Malecha, M. Marques, P. Martizzi, J.M.K. O'Keefe, W. Pickel, G. Predeanu, S. Pusz, J. Ribeiro, S. Rodrigues, A.K. Singh, I. Suárez-Ruiz, I. Sýkorová, N.J. Wagner, D. Životić. "Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III)" in International Journal of Coal Geology, Elsevier BV (2020). https://doi.org/10.1016/j.coal.2020.103411