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Упит dcterms_subject_txt:динамички модул еластиности

162 items

  • Sprega neuronskih mreža i numeričkih modela zadefinisanje sigurnih rastojanja kod razletanja komada pri miniranju

    Saša S. Stojadinović (2013-09-16)
    Doktorska disertacija sa navedenim naslovom prezentuje rezultate istraživanjaproblema razletanja komada pri miniranjima. Cilj istraživanja bio je kreiranje opšteg iuniverzalno primenljivog modela za prognozu maksimalnih dometa razletelih komada idefinisanje sigurnih rastojanja. Kombinacijomterenskih istraživanja, numerikogmodeliranja balistikih trajektorija razletelih komada i adaptivne prirode neuronskihmreža definisan je koncept neuro-numerike sprege. Sprega je objedinila univerzalnuprimenljivost numerikog modela i sposobnost prilagoavanja neuronskih mrežalokalnim uslovima u opšti model za prognozu maksimalnih dometa razletelih komada.Za potrebe sprege, a kao integralni deo disertacije, razvijen je metod za odreivanjekoeficijenta ...
    Razletanje, miniranje, domet, sigurna rastojanja, numeriki modeli,neuronske mreže, sprega, verifikacija

  • Geotehnički uslovi izgradnje metro stanice "Francuska" u Beogradu

    Lazar Pavlović (2024)
    Cilj ovog rada je analiza stabilnosti dijafragme, predviđene kao mere za obezbeđenje dubokog iskopa od zarušavanja okolnog tla koji se izvodi na mestu buduće metro stanice “Francuska” koja je planirana u okviru prve faze, prve linije metroa u Beogradu – sekcije „Centar“. U okviru numeričke analize je izvršena analiza stabilnosti konzolne dijafragme kao i dijafragme sa ankerom – slobodno oslonjene dijafragme, kako bi se moglo napraviti poređenje dobijenih vrednosti koje se odnose na dubinu fundiranja koja je potrebna da ...
    istraživanja, metro stanica, iskop, dijafragma
    ... statičkog penetrometra — qi (MPa) / 2* Nedrenirana čvrstoća na smicanje — Su (kN/m?) 331 40 – 120* Parametri deformabilnosti Modul stišljivosti – Mv (kN/m?) / 10000? Modul elastičnosti – Es (kN/m?) 46003 / Tabela 7. Fizičko – mehanički i otporno deformabilni parametri nasipa, 7 - Sowers (7979); ...
    ... (") 29 / / kohezija c (kPa) 29 / / Nedrenirana čvrstoća na smicanje — Su 99 #1 50 (kN/m?) Parametri deformabilnosti Modul stišljivosti – Mv (kN/m?) 9900? / 45003 Modul elastičnosti – Es (kN/m?) / / / Poasonov koeficijent v .25 Koeficijent filtracije k (m/s) 9.8:10 9 / | 3.7:1078 Tabela ...
    ... kohezija c (kPa) 23! / / Nedrenirana čvrstoća na smicanje — Su / 75? | 80 — 100*%* (kN/m?) Parametri deformabilnosti Modul stišljivosti — Mv (kN/m?) 103003 / | 125004 Modul elastičnosti – Es (kN/m?) / / / Koeficijent filtracije k (m/s) 6.3·:10% / |1·10-% Tabela 9. Fizičko – mehanički i otporno ...

  • Energetska bezbednost sektora prirodnog gasa Srbije

    Aleksandar Madžarević, Predrag Jovančić, Miroslav Crnogorac (2023)
    U prve dve decenije 21. veka obezbeđivanje sigurnosti snabdevanja prirodnim gasom domaćeg tržišta bio je jedan od prioriteta razvoja energetike Srbije. Istovremeno, aspekt sigurnog snabdevanja bio je neizostavni deo slagalice stvaranja energetske bezbednosti. Izražena uvozna zavisnost je dominantna karakteristika sektora prirodnog gasa, tačnije, Republika Srbija je snažno zavisna od ruskog gasa, sa više od 80% uvezenih količina gasa, a do pre dve godine snabdevala se isključivo kroz jednu interkonekciju. U radu se razmatra aktuelna situacija u sektoru prirodnog ...
    N-1, IDUPS, energetska bezbednost, sigurnost snabdevanja
    ... Ivanjici. 2006. godine (CV) . upisao je Mašinski fakultet Univerziteta u Beogradu. Osnovne i diplomske Slzozg]rec' za svakog akademske studije na modulu Procesna tehnika i zaštita životne sredine završio je u roku, 2011. godine. Završio je doktorske studije na Rudarsko-geološkom fakultetu, Univerzitet ...
    ... words about each enrolled at the Faculty of Mechanical Engineering, UB. He completed his author) undergraduate and graduate academic studies in the module Process Engineering and Environmental Protection in 2011. He finished his doctoral studies at the Faculty of Mining and Geology, UB, in the study ...

  • Merenje u naftnom rudarstvu

    Snežana Aleksandrović, Branko Leković (2020)
    metrologija, ležišta nafte

  • Bridging Computational Lexicography and Corpus Linguistics: A Query Extension for OntoLex-FrAC

    Christian Chiarcos, Ranka Stanković, Maxim Ionov, Gilles Sérasset (2024)
    OntoLex, dominantni standard zajednice za mašinski čitljive leksičke resurse u kontekstu RDF-a, Linked Data i tehnologija Semantičkog veba, trenutno se proširuje sa posebnim modulom za Frekvencije, Primere i Informacije zasnovane na Korpusu (OntoLex-FrAC). Predlažemo novi komponent za OntoLex-FrAC, koji se bavi inkorporacijom korpusnih upita za (a) povezivanje rečnika sa korpusnim mašinama, (b) omogućavanje RDF baziranih web servisa da dinamički razmenjuju korpusne upite i podatke odgovora, i (c) korišćenje konvencionalnih upitačkih jezika za formalizaciju unutrašnje strukture kolokacija, skica reči i ...
    standardizacija, digitalna leksikografija, OntoLex, upiti korpusa, povezani podaci, Lingvistički povezani otvoreni podaci

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... the selection of artificial lift methods. This contains three modules: a module of expert knowledge, experience and theoretical knowledge; a simulation design module; and an economic evaluation module. The expert knowledge module consists of an expert knowledge base, i.e., the knowledge of nine wor ...
    ... 3 of 15 commonly-used calculations. The design simulation module serves to design the methods selected in the previous module. The results of this module show the performance of the well for the selected individual method [9]. The module of economic evaluation uses detailed designing equipment, surface ...

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... Other (lime) undefined >15 <3 2. The classification of fly ash according to the module R size ( ) ( )32 32 OFeMgOCaO AlOSiO R ++ + = (1) According to module R size, fly ash can be divided into: - silicate – calcium R < 2, - silicate R ...
    ... 10,11 7,23 CaO 2,12 16,10 8,74 MgO 0,64 4,39 2,64 SO3 0,66 3,27 1,76 S 0,26 1,31 0,70 Na2O 0,08 0,72 0,32 K2O 0,25 1,49 0,74 ( ) ( )32 32 module OFeMgOCaO AlOSiO R ++ + = 2,18 9,98 4,38 SiO2/Al2O3 1,92 6,27 2,66 2.2.1 The classification of fly ash on the basis of chemical composition ...
    ... 54 6,03 7,23 CaO 1,05 1,16 8,74 MgO 3,01 2,83 2,64 SO3 0,85 0,54 1,76 S 0,33 0,21 0,70 Na2O 0,57 0,43 0,32 K2O 1,05 1,16 0,74 ( ) ( )32 32 module OFeMgOCaO AlOSiO R ++ + = 7,65 7,32 3,97 SiO2/Al2O3 2,36 2,33 2,57 Comparison of the chemical composition of fly ash taken in S1 and S2 ...

  • Building Terminological Resources in an e-Learning Environment

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... exploitation, to mine safety protection systems, mining equipement management, human resources management systems, as well as in a business intelligence module of the information system for defining OLAP cubes. Given the fact that RudOnto is targeted to become the reference resource for mining terminology ...
    ... ekvivalent 0..* Bibliografija MultiMedija Figure 2: UML model of RudOnto structure Figure 3 features panels from the information system module dedicated to management of RudOnto; the left hand side of the larger panel shows the hypernym/hyponym hierarchy of concepts, while the right hand ...
    ... of development of e-learning courses on Moodle during the past three years additional modules have been added on an "as needed" basis, such as the module for mathematical formulas. By the end of the academic year 2011/12 the number of courses created on Moodle has doubled in comparison with the previous ...

  • An aproach to Implementation of blended learning in a university setting

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Jelena Prodanović (2011)
    ... the LDAP Authentication Module. For each student enrolled at FMG a user account is created in the Active Directory. The student can use this account to access a wide range of services within the FMG intranet, including Moodle. By means of the LDAP authentication module the Moodle platform is ...
    ... ,  IMAP (Internet Message Access Protocol) server,  LDAP (Lightweight Directory Access Protocol) server,  PAM (Pluggable Authentication Module),  RADIUS (Remote Authentication Dial-In User Service)... The FMG computer network features a centralized authentication system, based on ...
    ... related to mining is underway, we now plan to connect both resources and introduce them in our blended learning approach by developing a Moodle module which would use these resources for annotation of educational content. 5. CONCLUSION The first results of blended learning at FMG, especially ...

  • Zaštita od miniranja

    Suzana Lutovac, Miloš Gligorić (2024)
    Miniranje

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd

  • Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

    Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić (2021)
    The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...
    геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти
    ... office, examination room and café, and an unheated module Mt1 as the mechanical room. Stage 2 (Figure 8b) is conceived as an expansion of Stage 1 with 2 added balneotherapy units Mb5–Mb6, an additional utility module Mu4 and an additional technical module Mt2. The third stage (Figure 8c) presents a further ...
    ... further extension with balneotherapy modules Mb7–Mb8, additional utility module Mu5 and technical module Mt3. An overview of the basic data for all three stages is given in Table 2. Table 2. Development stages—an overview of basic data. Development Stage Balneo Units (Heated) Utility Units (Heated) ...
    ... needed for heating. During initial research, after developing the modularity-based approach, the mod- ules were formed as single-purpose entities (one module for one type of balneological treatment—Figures 7, 11 and 12). This approach was rather successful in many cases, where it provided more options for ...

  • 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
    ... contains the “classical” elements of an expert system: the knowledge base, an inference engine, the user interface and a working memory, but also a module for the interface with SimVent numerical routines, the simulation routines themselves, and a data base used by these routines /Fig. 3/. The ...
    ... between two modules is allowed only through their previously defined external links, while all implementation details remain “hidden” within the module itself. This requirements can be met successfully through the modified object-oriented approach proposed in this paper: the units of modularity ...
    ... represent logical deductions about the knowledge base or specifications of how it changes over time. Each rule is a relatively independent module, which made it possible to build the reasoning systems gradually, rule by rule. Figure 4. The KAPPA-PC Object Browser for VENTEX The classes ...

  • Geotehnički uslovi rekonstrukcije Zavičajnog muzeja u Jagodini

    Milan Tokanović (2024)
    U radu su prikazana geotehnička istraživanja za potrebe rekonstrukcije Zavičajnog muzeja Jagodina.Zavičajni muzej u ulici Kneginje Milice br.82 u Jagodini, ima ozbiljna oštećenja pojedinih delova konstrukcije koja su nastala na objektu tokom više od 80 godina eksploatacije.Kako bi se trajno rešio problem dinamičke stabilnosti i statičke održivosti konstruktivnog sistema objekta,neophodno je bilo definisanje geotehničkih uslova u zoni interakcije prirodne sredine i konstrukcije predmetnog objekta.Izvedena su terenska i laboratorijska ispitivanja na osnovu kojih su dobijene geotehničke podloge. Na osnovu dobijenih geotehničkih podloga ...
    geotehnička istraživanja, Zavičajni muzej, temelji, fundiranje, nosivost, sleganje, istražne jame, laboratorijska geomehanička ispitivanja, Jagodina
    ... trenja Q= 24 o Direktno smicanje SRPS EN ISO 17892-10:2019- kohezija c= 15.5 kPa Edometarska stišljivost SRPS EN ISO 17892-5:2017 modul stišljivosti E,„. modul rasterećenja Eoed 50-100 5556 kPa 100-50 16667 kPa Eoed 100-200 8696 kPa 200-100 66667 kPa Eoed 200-400 9756 kPa 400-200 133333 kPa ...
    ... trenja Q= 29 o Direktno smicanje _SRPS EN ISO 17892-10:2019- kohezija c= 13.7 kPa Edometarska stišljivost SRPS EN ISO 17892-5:2017 modul stišljivosti E,„. modul rasterećenja Eoed 50-100 6667 kPa 100-50 25000 kPa Eoed 100-200 9524 kPa 200-100 66667 kPa Eoed 200-400 14815 kPa 400-200 200000 kPa ...
    ... trenja Q= 27 o Direktno smicanje _SRPS EN ISO 17892-10:2019- kohezija c= 15.1 kPa Edometarska stišljivost SRPS EN ISO 17892-5:2017 modul stišljivosti E,„. modul rasterećenja Eoed 50-100 6250 kPa 100-50 20000 kPa Eoed 100-200 8333 kPa 200-100 66667 kPa Eoed 200-400 11429 kPa 400-200 200000 kPa ...

  • Definisanje geotehničkih karakteristika terena za potrebe izgradnje stanice za snabdevanje gorivom “OMV” u Trsteniku

    Milica Dutina (2024)
    U ovom Završnom radu prikazana su istraživanja na osnovu kojih su urađeni grafički dio, proračun nosivosti i proračun analize slijeganja terena za potrebe izgradnje benzinske stanice sa pratećim objektima. Detaljno je analiziran prodajni objekat,čelični rezervoar za gorivo i znak. Za proračun graničnog opterećenja korišćena je metoda Mayerhofa, dok je analiza slijeganja urađena Konsolidacionom metodom slijeganja za prodajni objekat i čelični rezervoar za gorivo, a za temelj znaka po principu slijeganja i rotacije krutih temelja - Gorbun Posadov. Sve dobijene ...
    terenska istraživanja, laboratorijska ispitivanja, geotehnička istraživanja, geotehnički model terena, osnovne tehničke karakteristike, analiza slijeganja, proračn nosivosti
    ... usvojiti ı kao maksimalni mogući napon bubrenja. Iz tih razloga je i modul sa daljim povećavanjem opterećenja, opadao. Na osnovu kriva koje pokazuju zavisnost vertikalnog napona c” i relativne deformacije Ah/h određena Je veličina modula stišljivosti My. 12 4. REZULTATI ISTRAŽIVANJA Za potrebe ...
    ... zbijanjem (vibroploče tzv. abe ili sl.). Zbijanje sa površine terena ili klasičan način zbijanja podrazumijeva kontinuiranu primjenu statičkog ili dinamičkog pritiska ili „gnječenja“ na površini terena radi zbijanja geomaterijala. 24 Slika 7 - Vibroploča (https://moodle.rgf.bg.ac.rs/course/view ...
    ... iskorišćene preporuke EVROCODA 7 (EC-7) za nekoherentne materijale prikazane su u tabeli 4. Tabela 4 - Prepori uke EC-7 za ugao unutrš njeg trenja i modul elastičnosti nevezanih tla qCka Ugao unutrašnjeg Es (MPa) opis (MPa) trenja Q 0.0 2.5 29 - 32 <10 Veoma rastresito 2.5 5.0 32 - 35 10 - 20 ...

  • Primena ubrzane konsolidacije kod izgradnje nasipa na deonici priključka Novi Beograd – Surčin autoputa ,,Miloš Veliki"

    Aleksa Tomičić (2024)
    Problem koji se javlja prilikom izgradnje objekata na ne konsolidovanom stišljivom tlu jeste pre svega vezan za prevelika sleganja tla usled opterećenja od objekata, najčešće su to objekti putne infrastrukture (nasipi), ili stambeno poslovni objekti. U tu svrhu se,primenjuju različiti vidovi ubrzanja konsolidacije tla. Stoga za potrebe izrade završnog rada Master akademskih studija studijskog programa geotehnika, na Rudarsko-geološkom fakultetu, izvršena je analiza dva najčešće korišćena postupka ubrzanja konsolidacije: predopterećenjem i ugradnjom peščanih drenova. Glavni cilj ovih postupaka je ...
    stišljivo tlo, konsolidacija, ubrzanje konsolidacije, predopterećenje, peščani drenovi

  • On the compatibility of lexical resources for NooJ

    Ranka Stanković, Miloš Utvić, Duško Vitas, Cvetana Krstev, Ivan Obradović (2012)
    Lexical resources for many languages are provided for the NooJ linguistic development environment. Meta-data descriptions of morphosyntactic and semantic properties of these languages and their resources are a mandatory part of each language module. In this paper we analyze how well the meta-data actually describe resources for a chosen subset of languages and to what extent are they compatible across languages to support multilingual processing. We show that there is place for improvement in both directions.
    ... Meta-data descriptions of morphosyntactic and semantic properties of these languages and their resources are a mandatory part of each language module. In this paper we analyze how well the meta-data actually describe resources for a chosen subset of languages and to what extent are they compatible ...
    ... them. From the point of view of Serbian, there was additional interest in this issue in view of the fact that the development of a new Serbian module for NooJ is underway. The analysis of compatibility of NooJ resources outlined in this paper was tackled by a comparison of the annotation systems ...

  • E-Connecting Balkan Languages

    Cvetana Krstev, Ranka Stanković, Duško Vitas, Svetla Koeva (2009)
    In this paper we present a versatile language processing tool that can be successfully used for many Balkan languages. This tool relies for its work on several sophisticated textual and lexical resources that were developed for most of Balkan languages. These resources are based on several de facto standards in natural language processing.
    Query expansion, e-dictionary, wordnet, proper name, aligned text
    ... Државе, and Bulgarian equivalents Ню Йорк and Съединени американски щати are connected automatically. 3. Using WS4LR with Aligned Texts The WS4LR module that works with aligned texts expects them to be in Translation Memory eXchange (TMX) format1. It can also transform texts previously aligned by ...
    ... browse. One such visualization is represented in Figure 1. Browsing, however, is not a particularly successful form of text exploration. WS4LR module for aligned texts offers users to pose different forms of queries that can be automatically expanded by using various bilingual lexical resources ...
    ... Although this version gave promising results for Serbian, it was hardwired into the tool itself so that it was not easy neither to modify Serbian module nor to apply it to other languages. With a new approach that relies on feature structure description of particular language morphology [6] and ...

  • OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian

    Ranka Stanković, Maxim Ionov, Medina Bajtarević, Lorena Ninčević (2024)
    Ovaj rad predstavlja novi jezički resurs za pretraživanje i istraživanje verbalnih aspektnih parova u BCS (bosanskom, hrvatskom i srpskom), kreiran korišćenjem principa Lingvističkih Povezanih Otvorenih Podataka (LLOD). Pošto ne postoji resurs koji bi pomogao učenicima bosanskog, hrvatskog i srpskog kao stranih jezika da prepoznaju aspekt glagola ili njegove parove, kreirali smo novi resurs koji će korisnicima pružiti informacije o aspektu, kao i link ka aspektnim parovima glagola. Ovaj resurs takođe sadrži spoljne linkove ka monolingvalnim rečnicima, Wordnetu i BabelNetu. ...
    aspekt glagola, lingvistički otvoreni podaci, BCS

  • An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System

    Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović (2006)
    In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...
    ... carried out using technical documentation and corresponding drawings. Maintenance works are defined per every type of equipment. The basic module of this system is for issuing maintenance work orders, which includes technical elaboration of: equipment maintenance operations, troubleshooting ...
    ... on of the process must be carried out at all levels of planning and implementation: strategic, tactical and monitoring level. 3.1 Reporting module The aim of this program is to make available online all the most important summary data from the daily operative events in the mine to the managers ...