Претрага
301 items
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Analysis of the exhaust emissions inventory from auxiliary mining machines
Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović. "Analysis of the exhaust emissions inventory from auxiliary mining machines" in 9th International Conference Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology (2023)
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Convective heat transfer in centrifugal pumps lifted wells: the case of South-Eastern Europe waxy wells
Electric submersible pumps (ESP) are applied in wells where additional energy is needed to ensure discharge of the fluid to the surface through the tubing. At the discharge side of the pump the fluid has bigger velocity, thus the pump induces a forced convection between the fluid and the tubing inner surface. Understanding of convective heat transfer in wellbores and analyses of influential parameters provides a possibility to optimise value of convective heat transfer coefficient in order to avoid ...Bojan Martinovic, Marija Živković, Branko Grubač. "Convective heat transfer in centrifugal pumps lifted wells: the case of South-Eastern Europe waxy wells" in International Journal of Oil, Gas and Coal Technology, Inderscience Publishers (2021). https://doi.org/10.1504/IJOGCT.2021.10043281
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Introduction to special section: Characterization of hydrocarbon and geothermal resource potential and carbon sequestration opportunities of the Pannonian Basin
Balázs Németh, Gábor Tari, Gábor Bada, Dejan Radivojević, Bruno Tomljenovic, Csaba Krézsek. "Introduction to special section: Characterization of hydrocarbon and geothermal resource potential and carbon sequestration opportunities of the Pannonian Basin" in Interpretation, AAPG SEG (2018). https://doi.org/10.1190/INT-2017-1207-SPSEINTRO.1
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Managing mining project documentation using human language technology
Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentationAleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja . "Managing mining project documentation using human language technology" in The Electronic Library (2018). https://doi.org/10.1108/EL-11-2017-0239
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Хидрогеолошки услови формирања угљокиселих минералних вода Србије
Goran H. Marinković (2014-06-17)Докторском дисертацијом разматране су хидрогеолошке структуре угљокиселихминералних вода литосфере Србије. При истраживањима узети су у обзир:резултати испитивања старости, порекла и физичко – хемијских карактеристикаугљокиселих вода, геотемпературни услови и геотектонска грађа литосфере,резултати изотопских испитивања на δ13С у карбонатима хидротермалнихлежишта, резултати истраживања минималних температура трансформацијекарбоната и структурно - хидрогеолошки услови у областима дренирањаугљокиселих вода.Резултати показују да је угљеник угљокиселих вода пореклом из карбонатахидротермалне фазе младих магматских процеса, а да су матични супстратиовог елемента карбонати мезозојских и палеозојских седиментних иметаморфних стена. Угљендиоксид ...литосфера Србије, угљокиселе воде, генеза, супстрати, рејони,хидрогеолошке структуре, дубина залегања, геолошки услови, типови,потенцијал.... супстрата угљеника (СО2). Угљокиселе минералне воде су природан ресурс, различитог квалитета и самим тим се разликује могућност њихове употребе. Формирање хидрогеолошки специфичних услова, угљокиселим водама даје угљендиоксид. Овај гас се генерише у литосфери кроз регионалне и контактно-метаморфне ...
... угљендиоксидом у угљокиселим водама се у подређеним количинама налазе и гасови: азот, сумпор-водоник, радон и други гасови (Не, Аr) који могу бити важни показатељи геохемијских услова њиховог формирања. Основни извори угљокиселог гаса у литосфери су масиви карбонатних и магматских стена, из којих се ...
... Зона веома успорених процеса водозамене теоретски залеже на дубинама већим од 1000 m. Природна брзина кретања подземних вода је веома мала (0,05 – 0,1 m/год). Практично нема услова за обнављање природних резерви подземних вода. Карактеришу је високе температуре и притисци. У њој се претпоставља ...Goran H. Marinković. "Хидрогеолошки услови формирања угљокиселих минералних вода Србије" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-06-17)
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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)Минирање представља и даље најефикаснији и најјефтинији начин експлоатације великих количина чврстих минералних сировина на површинским коповима. Енергија експлозије се користи за фрагментацију чврсте стенске масе до захтеване гранулације. Поред позитивних ефеката минирања, постоје и одређени нежељени ефекти сваког процеса минирања који се могу јавити, а то су: потреси тла, разлетање комада стене, ваздушни удари, отровни и загушљиви гасови и прашина. Разлетање комада стене је неконтролисано избацивање фрагмената одминиране стенске масе и представља један од главних извора материјалне ...Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac. "Flyrock Induced by Blasting in Surface Mining" in 8th Balkan Mining Congress, Belgrade, September 28-30, 2022, Mining Institute Ltd, Belgrade (2022)
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Termičke metode povećanja iskorišćenja naftnih ležišta
Vesna Karović Maričić (2019)Vesna Karović Maričić. Termičke metode povećanja iskorišćenja naftnih ležišta, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2019
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Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)
Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu. "Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)" in Carbonates and Evaporites, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s13146-020-00550-3
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A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)
Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenikaGordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević. "A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)" in Marine and Petroleum Geology, Elsevier BV (2021). https://doi.org/10.1016/j.marpetgeo.2021.105383
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Osnovi hidrogeologije
Petar Dokmanović (2021)... agensi formiranja (prirodnog) kvaliteta PV, koji su navedeni u poglavlju 14, doprinose formiranju hemijskog sastava PV. Atmosferske padavine imaju nizak sadržaj rastvorenih mineralnih materija i gasova, u opsegu od nekoliko do nekoliko desetina mg/l. Antropogena emisija (gasova i čađi) i vulkanska ...
... izotopa radijuma, najčešće se javlja 228Ra, čiji su sadržaji u PV znatno niži od uranovih. Već pomenuti plemeniti gas radon je najzastupljeniji prirodni radionuklid u PV. To je nevidljiv gas, bez ukusa i mirisa, teži od vazduha. Javlja se u vidu tri izotopa, a preovlađujući je 222Rn, koji nastaje emanacijom ...
... mogu osetno da utiču na kvalitet PV primorskih izdani. Kada je prirodni kvalitet PV narušen antropogenim uticajem, govorimo o zagađenju PV. Formiranje kvaliteta PV počinje već u atmosferi, gde kišne kapi rastvaraju/apsorbuju gasove i čvrste materije, a nastavlja se po dospeću atmosferskih padavina ...Petar Dokmanović. Osnovi hidrogeologije, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2021
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Развој модела за управљање рударском пројектном документацијом
Aleksandra Đ. TOMAŠEVIĆ (2018)rudarstvo, projektna dokumentacija, digitalna biblioteka, prirodno jezičke tehnologije, ekstrakcija podatakaAleksandra Đ. TOMAŠEVIĆ. Развој модела за управљање рударском пројектном документацијом, Beograd:Rudarsko Geološki Fakultet, 2018
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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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Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability
Marija Živković, Dejan Ivezić (2021)Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија... Energy Agency 2016). Being heavily dependent on fossil fuels, energy use in urban areas currently generates more than 70% of global green- house gas (GHG) emissions. The major share of energy consumed in urban areas is related to heating needs, while fossil fuels make approximately 75% of consumption ...
... et al. (2020) presented a thermo–economic–envi- ronmental analysis of heat recovery potential from the Ira- nian industry sector and calculated natural gas savings and carbon dioxide reduction. Somogyi et al. (2018) determined the potential of wastewater excess heat that could be used in district heating ...
... jection of the future energy mix, it is assumed that heat delivered by heat pumps will firstly substitute coal, then heavy oil and at the end natural gas. Such an approach and order of substitution is governed by the need for maximiz- ing the reduction of GHG emission and air pollution in the cities ...Marija Živković, Dejan Ivezić. "Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability" in Clean Technologies and Environmental Policy, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10098-021-02063-6
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VENTEX: An Expert System for Mine Ventilation Systems Analysis
Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...... interdependent parameters pertaining to the network status, ventilation status, ventilation system stability, air current losses, climate conditions, gas state, fire risk and dangerous dust pollution risk. The solution of these problems relies to a great extent on numerical methods. With the development ...
... 1994). This package, which enables the simulation of air flow distribution in a mine, the heat and fire transmission mechanisms, distribution of gas and distribution of respirable mineral dust, is currently being used by the “Soko” mine in Serbia. Numerical software products in mine ventilation ...
... the following categories: the ventilation network, aeration of the mine, stability of the ventilation system, air loss, climate conditions, mine gas state, fire risk and harmful dust risk. Once the parameter values are obtained the estimation process for the general ventilation state of the ...Ranka Stanković, Nikola Lilić, Ivan Obradović. "VENTEX: An Expert System for Mine Ventilation Systems Analysis" in YU Info '96 Brezovica, Društvo za informacione sisteme i računarske mreže (1996)
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Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду
... пројектовање и вођење припреме нафте, гаса, вода и геотермалних енергената; пројектовање и управљање техничко-тех- нолошким процесом цевоводног транспорта нафте, гаса, вода и геотермалних енергената; пројектовање и управљање системима за дистрибуцију природног гаса; пројектовање мерно-регулационих станица; ...
... НАСТАВНА ДЕЛАТНОСТ НА ФАКУЛТЕТУ У ПЕРИОДУ 1991. – 2015. ГОДИНА 50 7. Научно подручје: Експлоатација лежишта нафте и природног гаса Смер: Технологија експлоатације нафте и гаса 8. Научно подручје: Вентилација и техничка заштита Смер: Вентилација, техничка и еколошка заштита 9. Научно подручје: ...
... коришћење природног гаса 4+6 10 Мултиваријабилни системи управљања 4+6 10 Рециклирање комуналног отпада 4+6 10 Неконвенционални нафтни и гасни ресурси 4+6 10 Оптимизација и планирање површинских копова (докт.) 4+6 10 Одабрана поглавља из експлоатације нафте и гаса 4+6 10 Сигурност ...главни и одговорни уредник Душан Поломчић. Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2016
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INVENTS: A Hybrid Mine Ventilation Planning and Design System
Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...... the ventilation network, • simulation of climate conditions in mine chambers, • modeling of fire incidence in ventilation networks as well as • gas distribution in ventilation network. CFD INVENTS Data acquisition Design Im plem entation and m aintenance System monitoring Fig. 2. Global ...
... ResNet SimVent VENTEX defining basic network resistance ventilation system estimation ventilation simulation Design CFD Estimates estimation of gas and dust emission and temperature conditions flow process modelling using CFD Data acquis ition ventilation and psychrometric parameters ventilation ...
... analysis of climate conditions in mine chambers, 3. a block for temperature and heat depression analysis in fire incidence conditions, 4. a block for gas distribution analysis in the ventilation network. All blocks are mutually interactively connected and the software package can successfully be used ...Lilić Nikola, Stanković Ranka, Obradović Ivan. "INVENTS: A Hybrid Mine Ventilation Planning and Design System" in Proceedings of International Scientific Conference of FME Session 4: Automation Control and Applied Informatics , Hong Kong : iConcept Press (2013)
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INVENTS: a hybrid system for subsurface ventilation analysis
Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...... the ventilation network, • simulation of climate conditions in mine chambers, • modeling of fire incidence in ventilation networks as well as • gas distribution in ventilation network. CFD INVENTS Data acquisition Design Im plem entation and m aintenance System monitoring Fig. 2. Global ...
... ResNet SimVent VENTEX defining basic network resistance ventilation system estimation ventilation simulation Design CFD Estimates estimation of gas and dust emission and temperature conditions flow process modelling using CFD Data acquis ition ventilation and psychrometric parameters ventilation ...
... analysis of climate conditions in mine chambers, 3. a block for temperature and heat depression analysis in fire incidence conditions, 4. a block for gas distribution analysis in the ventilation network. All blocks are mutually interactively connected and the software package can successfully be used ...Nikola Lilić, Ranka Stanković, Ivan Obradović. "INVENTS: a hybrid system for subsurface ventilation analysis" in Proc. of International Scientific Conference of FME, September 2000, Ostrava, FME (2000)
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Actual contamination of the Danube and Sava rivers at Belgrade (2013)
Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening... the same internal standard was added to the third fraction as well. Before injection into the gas chromatograph (GC), all of the extracts were reduced to a volume of 50 µL at room temperature. For the gas chroma- tographic–mass spectrometric (GC–MS) analyses, the extracts were reduced to a volume of ...
... acetonitrile (ACN)/water mixture at a flow of 0.25 mL min-1 (t0: 40 % of ACN, t20: 90 % of ACN). Nitrogen was used as the nebulising gas at a pressure of 25 psi, drying gas (N2) temperature and flow were 350 °C and 10 L min-1, respectively. The ion trap scanning range was set from 50 to 800 u. Estradiol ...
... Slovenia, 6Природно–математички факултет, Универзитет у Новом Саду, Нови Сад, 7Природно– –математички факултет, Универзитет у Нишу, Ниш, 8 Природно–математички факултет, Универзитет у Крагујевцу, Крагујевац и 9 Institute of Geology and Geochemistry of Petroleum and Coal, RWTH Aachen University ...Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer. "Actual contamination of the Danube and Sava rivers at Belgrade (2013)" in Journal of the Serbian Chemical Society, National Library of Serbia (2014). https://doi.org/10.2298/JSC131105014A
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Phase relations and physical indicators of municipal waste from old landfills in Serbia
Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science... structure (within the individual components of waste material is an interspace filled with landfill leachate, landfill gas or with gas and leachate, cither free or 'captured” gas), porosity (m) can be analysed as secondary porosity (porosity within particles) and porosity between partcles. However ...
... mš/m* e= V /V, = | ___I-n Unit weight W a of solid A kN/m* E i ——— particles Vs 1-n 'Volume water v m*/m* v= V Zw.J0 content -% V Yw Volume gas a m*/m* a _&_ n_w content -% a Saturation g m*/m* S =&=X degree ii -% ii Vp The three-phase system for municipal waste does not take into account ...Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić. "Phase relations and physical indicators of municipal waste from old landfills in Serbia" in Japanese Geotechnical Society Special Publication, The Japanese Geotechnical Society (2021). https://doi.org/10.3208/jgssp.v09.cpeg016
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Одлагање индустријског отпада
Динко Кнежевић, Славко Торбица, Златко Рајковић, Мирко Недић. Одлагање индустријског отпада, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2014