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Упит dcterms_subject_txt:ARCR MA model

960 items

  • Петролошке карактеристике тријаских карбоната у околини Толића (Мионица)

    Михаило Вујашевић (2024)
    У тријаским теренима у околини Толића код Мионице извршено је узорковање карбонатних стена које су предмет овог рада. На одабраним узорцима утврђене су петролошке карактеристике. Главни задатак овог завршног рада представља испитивање минералошких и петрографских карактеристика карбонатних стена, применом оптичке анализе, рендгенске дифракције и калциметрије. Макроскопском детерминацијом и применом Данхамове класификације испитивани узорци су сврстани у кречњаке калкаренитског до калклутитског склопа, односно mudstone, packestone и grainstone типа. Микроскопским прегледом кречњака и применом Фолкове класификације утврђен је њихов састав и ...
    тријаски карбонати, петрографске карактеристике, класификације кречњака
    ... (Qakynmrera Ha muHd(bpakroMerpy 3a mpax „Rigaku SmartLab” moy cnrenrehHM cKCIICDHMCHTaJIHHM yCJIOBHMa: – pamHH HamoH: U= 40 kV – JauMHa crpyje: /= 30 mA – | peHreHCKO 3padueMe ca aHo/me Gakpa (Cu), ranacHa nyxxuHa: CuKa = 1,54178 A – _ OHCer HCHHTHBaMba: 2-65? 20 – _ KopaK:0,01* 20 – | BpeMeHcKa ...
    ... rOTBp)la c1araPba Gap TpH Hajjaue pe(parekcHje, ImTO y OBOM Clyuajy HuMje Moryhe. MelbyTMM, nosHajyhwM pupoy McHuMTHBaHOT MarepHijana, Moxe ce pehuH ma pedQnekcuja uuja je d-Bpemnocr 3,34 A ojroBapa gHajjauoj peQiytekcij MiHepajta KBapna, SiO», a pe()nekcuja Ha d = 2,88 A najjauoj pedjneKcnju MuiHepajma ...
    ... M HporpaMHMa PynapckKo-reomomijor (pakyanrera Mnu RpyrHx BHCOKOLIIKOJICKHX yCTaHOBa; • nacy pe3yjrraTH KOpČKTHO HaBecJIĆČHH H • a HHCaM KpmuHMo/ma ayTOpckKa npaBa H KopHcTHo/a MHTeJIČKTyaJlHy CBOJHHy JpyrHx JnuHua. y Beorpaay, 22, 2 2 024 Hlornuc crynenra O0pasatj 2 H3JABA O HCTOBETHOCTH ...

  • Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Tina Dašić (2023)
    Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment, Geography, Planning and Development, Building and Construction
    ... with conduit, channel orientation, hydrogeological function, etc.). Ultimately, the model was based on more than 360,000 data items [7]. The 2D model mesh is shown in Figure 4B. For the 3D karst groundwater model, the ArcGIS program was used, along; with some additional software [7]. Linked layers ...
    ... 647.29 km. Detail of the model is shown in Figure 4C. For the purposes of defining the circulation conditions within the karst aquifer that drains via Krupaja Spring, parts of the model from the recharge to the discharge zone were used (Figure 4D) [19]. I, illl 3D Model of karst channels distribution ...
    ... spring area 3D model of karst conduits watershead borders Figure 4. Elements of the spatial model of the Krupaja Karst System; (A)—map of Beljanica karst massif including the position of hydrogeological, geological, geomorphological, and speleological features, (B) — 2D model mesh according; ...

  • Hydrodynamic analysis application of contaminated groundwater remediation to oil hydrocarbons

    Predrag Pajić, Aleksandar Čalenić, Dušan Polomčić, Dragoljub Bajić (2018)
    U ovom radu sagledana je primena hidrodinamičke analize u okviru odabrane remedijacione metode ,,pumpanja i tretiranja” kontaminiranih podzemnih voda ugljovodonicima, na primeru pretakališta rafinerije nafte u Pančevu. Primenjena hidrodinamička analiza predstavlja pravilan, a sve češće i neophodan pristup u savremenoj hidrogeologiji. Prethodnim hemijskim analizama uzoraka tla i podzemnih voda na istražno-osmatračkim objektima detektovano je zagađenje produktima nafte. Novoizvedena istraživanja obuhvatila su izvođenje 12 pijezometara različitih dubina, geoelektrično sondiranje tla, ,,in situ” merenja prisutnog kontaminanta, izdvojenog kao hidrofobna faza LNAPL, ...
    kontaminacija, matematički model, podzemne vode, remedijacija, ugljovodonici

  • Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)

    Howard R. Feldman, Barbara V. Radulović, Fayez Ahmad (2023)
    Brachiopods, Middle Jurassic, Sphriganaria, shell microstructure, Ethiopian Province

  • Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model

    Miloš Marjanović, Stefan Milanović, Nikola Simić, Lazar Kričak (2024)
    The Majdanpek open pit mine south district is currently active mining prospect of copper ore exploitation in eastern Serbia. Its depth is approaching the termination depth and occurrences of large-scale instabilities and global instability of the final pit slope is possible. These can generate catastrophic mass movement inside an area that encloses a regional road route and the Pek River bed which is channelled along the outer contour of the pit. The displacements that were noted in early 2023, in the ...
    displacement, survey, inverse velocity, open pit

  • Preliminary impact assessment of No2 emission from a heating plant on air pollution: case of Zemun, Serbia

    Boban Pavlović, Uroš Pantelić, Marija Živković, Dejan Ivezić (2023)
    The aim of this paper is to provide a preliminary evaluation of the impact caused by NO2 emissions from a heating plant on the local air quality. To model the spatial distribution of NO2 emissions from the heating plant, the AERMOD model was employed. The evaluation was conducted by analyzing and contrasting the simulated NO2 concentration from the heating plant with the overall NO2 concentration recorded at the nearest monitoring station over the entire heating season. The study focused ...
    AERMOD, квалитет ваздуха, моделирање дисперзије загађења, топлана, NO2 загађење

  • Анализа могућности примене метода повећања степена искоришћења на нафтном лежишту "Ј"

    Иван Савић (2024)
    Комплексно лежиште „Ј“ је сачињено од колектор стена различите стратиграфске припадности и хетерогеног литолошког састава. Лежиште се налази у последњој фази разраде, а током животног века експлоатисано је само примарним методама. У раду је приказана анализа стања разраде лежишта, а као основни фактори који су допринели ниском степену искоришћења лежишта издвојени су вискозност нафте, хетерогеност колектора и пад лежишног притиска. Изведена је хидродинамичка симулациона студија помоћу које је издвојена најпогоднија зона за пилотну примену терцијарних метода. Коришћењем „скрининг“ критеријума ...
    Вискозност, хетерогеност, полимери, термичке методе
    ... Ha(DTHOM JIeoxHmrry „J“ noKa3aHo jJe a Cy OCHOBHH orpaHMuaBajyhM (akTopM pa3panme BMHCKO3HOCT HaQTe H xereporeHocT mexumra. /lo Mapaxkaja mouHme Ma JIOMa3H H TyOHTaK JICDKHIHHC eHeprHje KojH ce orneja y majy nexxumiHor rpHTHcKa OJU TOTOBO 50% y oJHoOcy Ha HOuMeČTHy BPpCMHOCT. IIokymmajH noBehama ...
    ... MeljyTHM, oHa HHje TIOBOJBHA y TIOTJIČHy HCTHCKHMBaHba 3jaocTae HadQTe y nexHMmTy jep ce y BHCOKOTIpOIIyCHHM 3OHaMa BHCKO3HOCT CMaMyje 3Oor Behe Op3uHe, ma Te 3OHC TIOCTAJy IIyTeEBH MaMber OTIIOpa 32 yTHCKHBaHH (bJIyHJL. /lunararrHo noHatnrame IoJmiMepHHXxX pacTBOpa BHCOKe MOJIcKyJ1apHe Mace Ce TaKolje ...
    ... IpoTHHaMba, KOJa Cc JaBJba y TIpHOyITOTHHCKOJ 3OHH, T/Ie je IOTpeOHO cMaMbHTH IIaJi IIpHTHcKa. 2) munaraHTHoO y NyOHHu MexHmrra, ryie je norpeOHo Ma ce HIpH yMepeHOM Op3HHaMa noBeha BHCKO3HOCT H HCTHCHe pe3HJlyHa Ha(pTa. OBaKBa BpcTa NOJMMecpa cc Ha3HBa OH(byHKIMOHaHH (acolHjaTHBHH) TIOJIHMCp ...

  • Примена ПСП пумпи за експлоатацију вискозних флуида

    Алекса Трифуновић (2024)
    Производња парафинске нафте се током историје одвијала уз помоћ дубниских клипних пумпи, све до појаве ПСП система који су показали боље каратеристике и већу ефикасност. Функционални дизајн пумпе омогућава производњу вискозних и абразивних мултифазних флуида, уз ниска капитална улагања. У раду је анализирана проблематика рада укључују губитке протока флуида, производњу песка, оштећење клипних шипки и тубинга и сам притисак на дну бушотине. Рађена је студија случаја за нафно лежиште „М“ у коме је приказан цео производни век почевши од ...
    парафинска нафта, систем ПСП, производња нафте, студија случаја
    ... CaMO JUIMCH3HOHHCaHbC OIIDEMC. ILInJb oOBor Pajna je a py?KH JIeTaJbaH OTIHC (DyHKHHOHHCaHba TEXHOJIOTHje J]yOHHCKHX BHjuUaHHX IIyMIIH (IICII) H ma HcrpaxxkH P5HXOBy IIpHMeHy y IIpOH3BOJUbH BHCOKO Iapa(buHckKe Ha(pe. IIopen ora, paX he aHanmasHparH cnenu()HMuHc H3423OBC H HpeJIHOCTH KOje OBa T ...
    ... Je cHcTeM eKrimtoaTanuHje MeXaHHKOM METOJIOM 3aBOJHC IIyMIIc. BynroTHHe KOJeE CeC CKCHJIOATHIHIy Ca 30aBOJHOM IHYyMIHOM Ca J(yOHHCKHM MOTOPOM, MOpajy ma 3aJIOBOJBaBaJy cJIenehe ycOBe: – JO3BOJBEHH CTEHCH HCKDHBJbCMba KaHaJIa OyITOTHHe He CMC Jla rpena3z 2* Ha 10M; – yrao oJcTymaba KaHajta OyIoTHHe ...
    ... e IipoO0JteMaTHKC JIOTOKa CC BPpIHH y (Da3H H3OOpa OIIpeMe, Jep XEMHJCKH peareHcH H TepMHuke 00pajne Mory a yrHuy Ha cTaFbe eJ1aCTOMCpa. 35 | ma„„a Crmaka 20 IIpoban OymorTuHe M-033D- IICII 36 Bp mp M-033D KOJIOHE YBOJI! [ ___OTBOPEHM MHTEPBANTM [___Sinopsrieo___I — ——— „=<=<=—= ...

  • Управљање радом центрифугалних компресора

    Младен Благојевић (2024)
    Овај мастер рад се бави анализом и управљањем рада центрифугалних компресора у индустријским постројењима, са посебним освртом на управљачке системе који осигуравају њихов ефикасан рад. Рад обухвата разматрање различитих система за регулацију протока, притиска и примену савремених метода регулације као што су повратна и напредна. Такође, анализиране су динамичке промене у раду компресора, утицај поремећајних величина и могућности оптимизације. Резултати су показали да правилна примена управљачких система не само да спречава пумпање, већ и повећава стабилност и продуктивност целокупног ...
    центрифугални компресори, управљање компресорима, проток притисак, повратна регулација, напредна регулација, оптимизација
    ... nonaruma H cTpyjHHIe y PberOBHM KaHaJIHMa HHcCy napanejHe. Takobe, crpyjabbe raca Kpo3 KaHajme poTropa u craTopa oxnBHja ce y3 mnojaBy yHyTpatmer TpeMa, ma Je pacrnonox»xuBa eHeprHja 34 KOMIIpHMMOBaMbe raca 30or Tora yMaMbeHa. IIopeji Tora, crpyJa raca Hanyrra nu(Dy30p c HeKOM H3J1a3HOM Op3HHOM, IITO ...
    ... y3poKy]Je JOJlATHH H3na3HH ryOHTaK. Vrramaj koHauHor Opoja nonaTutna HcKa3yje Ce KDO3 OTKJIOH MJIa3a 30Or pa3JIHKc rpHrucaka Ha H3J1a3y H3 KojJIa, ma crpyJa raca HamnyrnrTa poTop HoJi yroM B' , KojH Je MaMbH OJI H3J1a3Hor yrna nmonaTune [> (CnaHka 14). Jlaknme, Mebba ce H311a3HH Tpoyrao Op3HHa ...
    ... CrpBapHa cHara nmoTpe0OHa 34 KOMIIpHMOBa?bC jJe: P = nH,=muuž (38) IIponec KOMIpHMOBab4, KaKoO je Beh IIOMeHyTO, Ce CMaTPa HOJIHTpOHCKHM IHIPpOHeCOM, ma je oxroBapajyha cHara: . (n—1)/n P =m_—ZoORToo [("&) _ 1] (39) poi MHnjenHauaBabbeM H3pa3a (36) H (37) nomna3H ce JIO H3pa3a 32 3aBHCHOCT KOM ...

  • Environmental Energy Security Indicators as Tools for Environmental Protection

    Aleksandar Madžarević, Dejan Ivezić, Marija Živković , Miloš Tansijević (2019)
    Еколошка прихватљивост је постала незаменљив синтезни показатељ сваке валидне енергетске анализе у последње две-три деценије. Енергетска безбедност је у директној хармонији с еколошком прихватљивошћу кроз многе прописане политичке циљеве, економске користи, правне тековине итд. Индикатори еколошке сигурности представљају један од основних елемената за одређивање енергетске безбедности и снажне алате за усмеравање енергетског сектора ка одрживом развоју. У овом раду, анализа је била концентрисана на показатеље енергетске безбедности у области животне средине који се односе на сектор природног гаса у ...
    енергетска безбедност, еколошки енергетски индикатори, заштита животне средине, еколошка прихватљивост
    ... remaining two are measurable and they are entering the model through numerical data that are the result of active monitoring. The data are then classified and fed into the analysis model itself in an adequate form. Such data are entered the synthesis model by the phase proposition procedure, where they ...
    ... An analysis of Energy Security has been done with mathematical model which bases are the theory of the fuzzy logic and the fuzzy conclusion considering energy, economic, ecological and social indicators. If the goal of the model is to decide on a scenario assessment that would demonstrate a rational ...
    ... appropriate stage composition with a ranked outcome. The synthesis model is presented in optimal form according to the partial (Pi) and synthetic (M) indicator. M = E; P1 = E1, P2 = E2, P3 = E3 (2) This has been done by tailoring the model in several steps (Figure 1). During the process, data is collected ...

  • WebGIS Cadastre of Abandoned Mines in Autonomous Province of Vojvodina

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2015)
    ... 2.3 Geodatabase model The geodatabase model was developed using UML (Unified Modeling Language) and CASE (Computer- Aided Software Engineering) tool Microsoft Visio, which has a developed integration feature with ArcGIS. Figure 1 shows part of the logical data model with basic classes of ...
    ... as well as the site, for example, a pit, a landfill, workshop or plant. Figure 1 shows part of the conceptual data model. Figure 1 Characteristic part of the conceptual model 3. SYSTEM IMPLEMENTATION 3.1 Development environment The relational database management system used was ...
    ... recultivation of abandoned mines in national parks and other protected areas in Vojvodina in compliance with existing legal regulations. The geodatabase model for this application has been developed using UML and CASE tool Microsoft Visio featuring an interface with ArcGIS. The WebGIS application was developed ...

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... by experimental measurements. Determination of parameters by model 1 The smallest square method is mainly used to obtain the parameters K and n which represents a common model (Simeunović, 1985). Determination of parameters by model 2 Proceeding from the rock mass oscillation law from the equation ...
    ... ležišta. Za određivanje parametara u jednačini Sadovskog, pored uobičajene metode najmanjih kvadrata primenjen je još jedan model. Pri tom je konstatovano da se oba modela mogu koristiti za izračunavanje brzine oscilovanja stenske mase. Ključne reči: radna sredina, miniranje, seizmičko dejstvo ...
    ... Model 1 1.2663 1 34.0616v R  (13) whereby linear dependence between log v and log R has been obtained, expressed by the equation (13), with the linear correlation coefficient r amounting: r = -0.8288. Graphic survey of soil oscillation law is shown in Figure 2. Model 2 1 ...

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)
    ... (Brazil et al. 2003; 2008). In our model we defined spatial network by nonlinear constrained objective function representing the cost of mine development and ore haulage. To find the minimum value of the objective function we use Genetic algorithm. 2. THE MODEL OF A DECLINE DEVELOPMENT SYSTEM ...
    ... Such network is defined by adequate objective function. Optimisation model is based on the minimisation of the nonlinear constrained objective function representing the cost of mine development and ore haulage. The model is not closed and allows the underground mining engineers to incorporate ...
    ... sections. Access infrastructure designing can be treated as spanning the spatial network which will connect all main terminals (points). In our model we defined spatial network by adequate nonlinear constrained objective function representing the cost of mine development and ore haulage. To find ...

  • From DELA Based Dictionary to Leximirka Lexical Database

    Biljana Lazić, Mihailo Škorić (2020)
    In this paper, we will present an approach in transforming Serbian language Morphological dictionaries from a DELA text format to a lexical database dubbed Leximirka. Considering the benefits of storing data within a database when compared to storing them in textual documents, we will outline some of the functionality that the database has made possible. We will also show how hand-made rules that use category labels lexical entries are marked with can be used to link lexical entries. ...
    Morfološki rečnici, jezički resursi, Leksimirka
    ... adequate markers. 3.2 Leximirka’s lexicographic database model The lexicographic database model of Leximirka, shown in Figure 1, is guided by the Lemon, LMF and Data Category Registry catalog (Stanković et al., 2018). The implemented model provides the ability to store lexico- graphic information ...
    ... lexicographic database and to an online application. In Sections 3.2 and 3.3 we will give a description of Leximirka’s lexicographic database model and data categories model. An overview of the application segments will be provided in Section 4.1. The possibilities for establishing relations among lexical entries ...
    ... ontologies (e.g. by defining morphological categories and synsets) (McCrae et al., 2012). The Lemon model is concise, descriptive, modular and RDF based. At the time of making Leximirka database, Lemon model consisted of five modules: Ontology-lexicon interface – ontolex, Syntax and Semantics – synsem, De- ...

  • Imputing missing data using grey system theory and the biplot method to forecast groundwater levels and yields

    Jelena Ratković, Dušan Polomčić, Zoran Gligorić, Dragoljub Bajić (2022)
    Groundwater management is one of today’s important tasks. It has become necessary to seek out increasingly reliable methods to conserve groundwater resources. Dependable forecasting of the amounts of groundwater that can be abstracted in a sustainable manner requires longterm monitoring of the groundwater regime (rate of abstraction and groundwater levels). Monitoring of the groundwater source for the town of Bečej, Serbia had been disrupted for multiple years. The objective of the paper is to assess the possibility of reinterpreting ...
    upravljanje podzemnim vodama, izvorište podzemnih voda, prognoziranje

  • Integrated energy planning approach for accelerating energy transition of households

    Boban Pavlović, Marija Živković, Dejan Ivezić (2023)
    The success of energy transition planning depends on several influential and variable factors that need to be considered and tracked in modeling to support policymakers. Expert-based energy models are mainly developed following the assumptions of experts and, in most cases, a limited number of stakeholders. This top-down modeling approach will provide satisfactory results in centrally managed energy sectors (electricity generation and distribution, district heating, etc.), where further decisions could be projected relatively precisely. However, the same approach will not ...
    Energetsko planiranje, Integrisano energetsko modeliranje, Energetska tranzicija, Domaćinstva, Individualno grejanje, LEAP

  • Quantitative landslide risk assessment in the city of Tuzla

    Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović (2021)
    In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...
    "landslides", "risk assessment"
    ... of accuracy and AUC of 0.85 was achieved in landslide susceptibility model. The same can be expected for all subsequent models which incorporate the susceptibility model, such as hazard and exposure. On the other hand, risk model cannot be easily validated. Visually it corresponds well with both ...
    ... realistic risk distribution over the populated areas. Intermediate models, such as susceptibility, exposure, hazard etc., as well as the final risk model suggests good performance, both visually and numerically (high accurancy >75% and AUC of >0.85) and justifies landslide assessment in the future for ...
    ... inventory as a reference; establishing connection between landslide and non-landslide occurrences against the conditioning factors – optimizing the model – fitting the classification function; applying the classification function to the unseen instances in the remaining testing/validating area; outputting ...

  • Design of the Opencast Coal Mine Drmno Dewatering System

    Vladimir Pavlović, Dušan Polomčić, Tomislav Šubaranović (2014)
    Development of mining in the opencast mine Drmno from Kostolac basin in Serbia is carried out in the increasingly complex geological and hydro geological conditions with the decline of the coal seams to the alluvial part of Europe's largest river Danube. Greater depth and inflow of groundwater significantly increase costs for dewatering facilities construction with the requirement for optimizing of this more and more important surface mining process. Making decision on screen construction in the opencast mine with redesign ...
    dewatering system, groundwater, hydrodynamic model, dewatering wells, screen, reliability, environmental effects.

  • Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije

    Marina D. ĆUK (2018)
    prirodni radioaktivni elementi, podzemna voda, geohemijska sredine, hidrogeohemijski uslovi, logistički model, hidrohemijsko modeliranje

  • Istraživanje mogućnosti korišćenja niskotemperaturnih izvora toplote za održivi razvoj energetike gradova

    Miodrag Grujić (2014)
    održivi razvoj, daljinsko grejanje, model, niskotemperaturni izvori, ELECTRE, Beograd