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Упит dcterms_subject_txt:Sistem AT

900 items

  • Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević (2019)
    Изингов модел, критично понашање, танки системи

  • Izbor elemenata sistema AT viseće podgrade za rudnike uglja sa podzemnom eksploatacijom u Srbiji

    Vladimir Milisavljević (2010)
    Sistem AT, viseće podgrade, rudnici uglja, podzemna eksploatacija.

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    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 ...
    ekspertni sistem, ventilacija
    ... available at: www.dr.rgf.bg.ac.rs VENTEX - EKSPERTNI SISTEM ZA ANALIZU RUDNIČKIH VENTILACIONIH MREŽA VENTEX: AN EXPERT SYSTEM FOR MINE VENTILATION SYSTEMS ANALYSIS Stanković Ranka, Lilić Nikola, Obradović Ivan Rudarsko-geološki fakultet u Beogradu Sadržaj - Analiza sistema za ...
    ... 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 projektovanja sistema VENTEX, organizacija baze znanja, struktura ES i korisnički interfejs ...
    ... specifikaciju sistema je korišćena objektno- orijentisana analiza, pa OOA model čine: objekti - okviri, slotovi - atributi, metode - demoni i pravila. VENTEX se koristi samostalno ili u kombinaciji sa prethodno razvijenim softverom za simulaciju ventilacije rudnika SimVent. Oba sistema rade u Windows ...

  • Ventex: an expert system for mine ventilation systems analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    roblems relating to mine ventilation systems analysis are usually of a very complex nature. They involve the estimation of numerous 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 to these problems relies, to a great extent, on numerical methods. With the development of computer technology these methods were incorporated as numerical routes in software packages, such as the mine ...
    expert system, mine ventilation

  • Srbija u OneGeology Europe

    Danka Blagojević, Ranka Stanković, Petar Stejić, Velizar Nikolić (2014)
    Геолошки завод Србије као носилац Пројекта ОneGeologyEurope заједно са Рударско геолошким факултетом и Министарством за природне ресурсе, рударство и просторно планирање су се укључили у међународни Пројекат OneGeology Europe у мају 2013. године у већ поодмаклој фази израде Пројекта. До краја 2013. године испунили су завршене активности које треба да доведу до пуноправног укључења у Пројекат чиме је Република Србија нашла своје место на Геолошкој карти Европе 1:1М. Геолошка карта Србије 1:1М представља компилациону односно поједностављену верзију ОГК 1:500 ...
    OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем
    ... конекција локалних веб сервиса са метаподацима, обезбеђује вишејезичност система и сагласност са стандардима ОneGeologyEurope и INSPIRE. Кључне речи OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем УВОД Основна мотивација иницијативе OneGeology Europe (1G-E, ...
    ... python функције arcpy.Dissolve_management; 4. Просторна трансформација из координатног система: Gauss-Kruger, зона 7, елипсоид: Bessel 1841, датум: Hermann-Skogel, јединица: metar у D_WGS_84 координатни систем; 6. Увоз просторних објеката у структуру података сагласну 1G-E стандарду; 7. Попуњавање ...
    ... конекција локалних веб сервиса са метаподацима, обезбеђује вишејезичност система и сагласност са стандардима ОneGeologyEurope и INSPIRE. Кључне речи OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем УВОД Основна мотивација иницијативе OneGeology Europe (1G-E, http ...

  • 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 GC oven heating programme was 3 min hold at 60 °C, 60 °C to 300 °C at a rate of 3 °C min-1 and a 20 min hold at 300 °C. The injection was performed via a split/splitless injector at 270 °C; the splitless time was 60 s. The carrier gas was helium at a velocity was 2 cm s-1 and a source temperature ...
    ... column, 100 Å, 150×3 mm, 2.6 μm particle size (Core- shell type) at a temperature of 25 °C using an 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 ...
    ... the Danube sediments at the location Vinča and the Sava sediments at the location Kapetanija slightly exceeded the target values (36 mg kg–1), but all other locations were characterized by insignificant contamination. Zn was detected below target values in the river sediments at the _____________ ...

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... required function, under given conditions and at a given moment, or during a given interval of time, and assuming the necessary supply is provided (external resources). Availability may also be expressed as the probability that the system will be available at any calendar time, that is, it will be able ...
    ... II. AVAILABILITY EVALUATION Availability is the probability that an item will be in an operable and committable state at the start of a mission when the mission is called for at a random time and is generally defined as uptime divided by total time (uptime plus downtime) [5,6]. However, this definition ...
    ... Machines were compared individually (selected machine at selected open pit mine), but also integral comparisons between machines and open pit mines were made. Obtain results should be used for the improvement of maintenance and logistic support at open pit mines, as well as an important parameter during ...

  • Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović (2022)
    This work presents a model for determining the availability of continuous systems at open pits by applying fuzzy logic and fuzzy inference systems. The applied model was formed by the synthesis of independent partial indicators of availability. The model is based on an expert system for assessing the availability of continuous mining systems. The availability of the system, as a complex state parameter, is decomposed into the partial indicators, reliability, and convenience of maintenance, and the fuzzy compositions, used ...
    системи, континуални систем експоатације, површински коп, рударство, расположивост, фази логика, max–min композиција, min–max композиција

  • A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić (2023)
    This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...
    системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFIS

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • Present Situation and Alternative Water Supply Solutions for Northern Vojvodina (Serbia)

    Bojan Hajdin, Vesna Ristić-Vakanjac, Dušan Polomčić (2020)
    The northern part of the Autonomous Province of Vojvodina is situated in the central and southeastern sectors of the Pannonian Basin. Drinking water supply is provided by groundwater abstraction from depths of 60 to 200 m. The quality of that water is poor, especially due to high concentrations of arsenic which most water supply systems do not remove. Current planning documents call for the construction of large regional water supply schemes on the banks of the Danube and Tisa ...
    podzemne vode, regionalni sistem vodosnabdevanja, arsen

  • Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... photo at the end of the experiment. d) Cumulative strain type map at the end of the experiment. Strain plots in Fig. 4b and d are overlain with visually interpreted structures from Fig. 4a and c (grey lines). Strain colour legend corresponds to Fig. 4b and d. e) Cross-sections of the model 7 at the end ...
    ... pin protruding from below the indenter (fixed pin in Fig. 2). In our experiments, the fixed pin is located at the northern end of the straight segment of rounded indenter’s western margin or at the north-western corner of the rectangular shaped indenter (Fig. 2a–c). The mobile plastic plate has a cut ...
    ... field and at room temperature (i.e., 19–20 ◦C). An electric motor imposes a constant ve- locity on the mobile plastic sheet. Depressions deeper than 1 mm are filled manually, using a funnel, with alternating layers of differently coloured sand, representing syn-kinematic sedimentation. At the end of ...

  • Punctuated, episodic magmatism and mineralization of the Rogozna skarn-hosted Au-Zn-Pb-Cu deposits revealed through high-precision U-Pb zircon geochronology

    Sean P. Gaynor, Milorad D. Antić, Vladica Cvetković, Kristina Šarić, Urs Schaltegger (2023)
    The subvolcanic regions of magmatic centers are commonly associated with alteration, mineralization, and economic ore deposits, however the duration and frequency of mineralizing pulses within the overall lifespan of these centers can be poorly defined. Therefore, models for the formation of mineral systems require more highprecision geochronology data to refine their evolutionary models. Rogozna Mountain and its eponymous magmatic complex, located in SW Serbia, hosts multiple base metal deposits associated with variable rock types and structural expressions and serves as a natural laboratory to ...
    Skarnovska mineralizacija, Magmatsko-hidrothermalni sistemi, Subvulcanske intruzije, geohronologija na cirkonima, CA-ID-TIMS

  • Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides

    Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)
    oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem
    ... the Timok and Knjaževac Basins at studied point P21. f) Fault gouge with sub- vertical foliation in the Devonian Zaglavak ophiolite (sheared and serpentinised gabbro) in the Timok Fault deformation zone at studied point P23. g) Oblique thrust in Tithonian limestones at studied point P29. h) Transfer ...
    ... , 2014; Cembrano et al., 2005; D'el-Rey Silva * Corresponding author at: Utrecht University, Faculty of Geosciences, Utrecht, the Netherlands. E-mail address: n.krstekanic@uu.nl (N. Krstekanić). Contents lists available at ScienceDirect Global and Planetary Change journal homepage: www.elsevier ...
    ... Iron Gates gorge in the NW at studied point P1. For the scale, note the two standing men in the black rectangle. c) Metres-thick fault gouge and foliation and zoomed detail in the Variscan Ogradena granite in the Cerna Fault zone along the NW flanks of the Iron Gates gorge at studied point P5. The position ...

  • Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names

    Branislava Šandrih, Cvetana Krstev, Ranka Stanković (2019)
    In this paper we present a rule- and lexicon-based system for the recognition of Named Entities (NE) in Serbian news paper texts that was used to prepare a gold standard annotated with personal names. It was further used to prepare training sets for four different levels of annota tion, which were further used to train two Named Entity Recognition (NER) sys tems: Stanford and spaCy. All obtained models, together with a rule- and lexicon based system were evaluated on ...
    NER, Named Entity Recognition Systems, Serbian, Personal Names
    ... Anica Dobra and her charm... the second file if they intersect on at least one character; strict an annotation of the first file will be consid- ered as corresponding to an annotation of the second file if they start and end exactly at the same characters; weighted the match is scored by the ratio of ...
    ... Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Proceedings of Recent Advances in Natural Language Processing, pages 1060–1068, Varna, Bulgaria, Sep 2–4, 2019. https://doi ...
    ... we developed its four versions by 4The evaluation was performed as a homework by several generations of students of Library and Information Sciences at the Faculty of Philology, University of Belgrade, in the scope of the course Information Retrieval. Their work was checked by their professor, which ...

  • Hibridni sistem za planiranje i analizu ventilacije rudnika

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilacija rudnika, informacioni sistemi
    ... završenih, gotovih sistema. Cilj UML-a je da opiše kako statičku strukturu, tako i dinamičko ponašanje različitih tipova sistema, kao što su: informacioni sistemi, tehnički sistemi, sistemi koji rade u realnom vremenu, distribuirani sistemi, sistemski softver i poslovni sistemi. Nove tehnike kao što ...
    ... publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Nikola Lilić Ranka Stanković Ivan Obradović HIBRIDNI SISTEM ZA PLANIRANJE I ANALIZU VENTILACIJE RUDNIKA Onima što ”idu skačući po gorama preskačući brežuljke”. ...
    ... informacioni sistemi, tehnički sistemi, sistemi koji rade u realnom vremenu, distribuirani sistemi, sistemski softver i poslovni sistemi. Imajući u vidu da je ResNet razvijen u programskom okruženju Visual Studio 6.0, prikaz ovog paketa dat je kroz UML notaciju u obliku troslojne arhitekture dijagrama ...

  • Pannonian Basin, Pannonian Basin System and Pannonian realm - three different concepts

    Dejan Radivojević (2019)
    Centralni Paratetis, neogen, Panonski basen, Sistem panonskog basena, Panonska oblast
    ... ns available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs ГеоморфФорум 2019: Програм и апстракти конфереције Панонски басен, Систем Панонског басена и Панонска област – три различита концепта Дејан Радивојевић Универзитет у Београду ...
    ... седимената. Након тога обзиром да се депозиција у неком басену не може посматрати одвојено од извора седимената који ће запунити басен уведен је појам Систем панонског басена који је поред подручја Панонског басена сенсу стрицто укључивао и суседни ороген представљен Карпатима, Динаридима и Алпима. Овај ...
    ... насталих дијахроном екстензијом и различитим фактором истезања. У геолошко-геоморофолошком смислу најчешће коришћени термини су Панонски басен, Систем панонског басена и Панонска област. Ипак сваки од ова три термина представља другачији концепт и не подразумева исту површину и време депоновања ...

  • 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 ugljjenika

  • Uticaj voda Dunava na formiranje kvaliteta podzemnih voda u zoni Apatina

    Bojan Hajdin, Željko Kljajić, Vesna Ristić-Vakanjac, Milojko Lazić, Marina Čokorilo-Ilić (2018)
    Područje Apatina u proteklom periodu često je pominjano u razvojnim vodoprivrednim strategijama kao potencijalno perspektivna lokacija za izgradnju izvorišta duž obale Dunava, koje bi moglo da ima regionalni značaj. Ovim rešenjem trebao bi se prevazići problem lošeg kvaliteta vode za piće na celom području severne Bačke, tako što bi se kvalitet podzemne vode poboljšao zahvatanjem infiltriranih rečnih voda u priobalju Dunava. Istraživanjima koja je Departman za hidrogeologiju, Rudarsko-geo¬loškog fakulteta vršio tokom poslednjih 13 godina na izvorištima za vodosnabdevanje grada ...
    vodosnabdevanje, osnovni vodonosni kompleks Vojvodine, regionalni vodovodni sistem

  • Funkcionisanje i uticaj epikarsta na režim, bilans i kvalitet podzemnih voda istočnog dela karstnog sistema Suve planine

    Branislav Z. Petrović (2020)
    Epikarst je deo karstne izdani koji se nalazi u okviru nadizdanske zone i predstavlja kompleksnu tačku dodira i mešanja nekonsolidovanog materijala sa površine terena, ostataka karbonatnih stena izmenjenih korozivnim delovanjem vode, živog sveta i njihovih ostataka, koja je delimično zasićena podzemnom vodom. Kompletan sud o stepenu razvoja i prisustva epikarsta na nekom krečnjačkom terenu moguće je doneti uz multidisciplinarna i obavezna detaljna hidrogeološka istraživanja. Poligon za sprovedena istraživanja je bio karstni masiv Suve planine, koja u geološkom i geografskom smislu ...
    epikarst, karstni sistem, podzemne vode, procesi samoprečišćavanja, hidrohemijski i mikrobiološki procesi u podzemnoj vodi