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Упит dcterms_subject_txt:coal blending

56 items

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • Coal homogenization stockyard sizing “Tamnava – Zapad” case study

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)
    ... for optimising coal blending strategies in large continuous open pit mining operations. International Journal of Coal Geology, 112, pp.141-153. 2. Beretta, F.S., Costa, J.F.C.L. and Koppe, J.C., 2010. Reducing coal quality attributes variability using properly designed blending piles helped by ...
    ... optimizing coal blending strategies in large continuous open pit mining operations (Benndorf, 2013.) integrates simulated realizations of the deposit with a simulation of transport- and blending models of mining operation. Beretta, et al (2010) used geostatistical simulation for reducing coal quality ...
    ... designed blending piles. These models allow assessing the uncertainty associated with the attributes content in the ore. A software tool for the prediction of the coal blending efficiency in longitudinal stockpiles takes as input the standard deviation and the autocorrelation of the coal property ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... a model to optimize operation of a plant must include minimizing: (1) the expected (mean) costs of coal blending and (2) the variance of coal blending costs. The cost objective function includes coal purchasing cost, ash disposal cost, sulfur removal cost, and fuel switch- ing costs. Chance constraints ...
    ... relocation. Coal homogenization at the stockyard phase Homogenization is stocking the ROM coal in layers, in their correct proportions, in the same stockpile, then reclaiming across the full face. In any blending pile the attenuation on vari- ability depends on the equipment used and the way coal is stocked ...
    ... relocation. Coal homogenization at the stockyard phase Homogenization is stocking the ROM coal in layers, in their correct proportions, in the same stockpile, then reclaiming across the full face. In any blending pile the attenuation on vari- ability depends on the equipment used and the way coal is stocked ...

  • A Tel Platform Blending Academic And Entrepreneurial Knowledge

    Ivan Obradović, Ranka Stanković, Jelena Prodanović, Olivera Kitanović (2013)
    ... 2023-10-14 03:28:00 A Tel Platform Blending Academic And Entrepreneurial Knowledge Ivan Obradović, Ranka Stanković, Jelena Prodanović, Olivera Kitanović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] A Tel Platform Blending Academic And Entrepreneurial Knowledge ...
    ... rgf.bg.ac.rs The Fourth International Conference on e-Learning (eLearning-2013), 26- 27 September 2013, Belgrade, Serbia A TEL PLATFORM BLENDING ACADEMIC AND ENTREPRENEURIAL KNOWLEDGE IVAN OBRADOVIĆ University of Belgrade, Faculty of Mining and Geology, ivan.obradovic@rgf.bg.ac.rs RANKA ...
    ... Geology, olivera.kitanovic@rgf.bg.ac.rs Abstract: In this paper the main features of BAEKTEL, a platform founded on OER principles, aimed at blending academic and entrepreneurial knowledge, are outlined. The platform is proposed as a solution for both integrating newly emerged knowledge generated ...

  • Building learning capacity by blending different sources of knowledge

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić (2016)
    ... Building learning capacity by blending different sources of knowledge Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Building learning capacity by blending different sources of knowledge ...
    ... x, xxxx 1 Copyright © 200x Inderscience Enterprises Ltd. Building learning capacity by blending different sources of knowledge Ivan Obradović*, Ranka Stanković, Olivera Kitanović and Dalibor Vorkapić Faculty of Mining and Geology ...
    ... engineering disciplines. Starting with academic education of future experts and continuing with their life-long learning, the approach relies on blending academic and entrepreneurial knowledge by means of technology enhanced learning. To that end a network of organizations is being formed where ...

  • Dimenzionisanje deponija za ugalj

    Dinko Knežević, Božo Kolonja, Ranka Stanković, Aleksandra Tomašević, Dragana Nišić (2014)
    ... finansira Ministarstvo prosvete, nauke i tehnološkog razvoja Republike Srbije. LITERATURA 1. Dröttboom M., (2012), Stacking, Blending & Reclaiming, Bed Blending Efficiency – Adding Value with Stockyard Systems, http://www.process- worldwide.com/ index.cfm?pid=9890&pk=385896&fk=520501&op=1&type= ...
    ... resurs", magistarski rad, Rudarsko-geološki fakultet, Beograd 5. Zador A.T., 1994, Technology and Economy of blending and mixing, The best of bulk solids handling: Stacking, Blending and Reclaiming of bulk materials - B/94, Trans Tech Publication 6. Wolpers FM, 1995, Homogenization of bulk material ...
    ... kvaliteta mešanjem ugljeva različitog porekla i karakteristika". S obzirom na dužinu pojma ustalio se izraz homogenizacija, mada se spominju i blending i miksing (sve anglizicmi). Izraz "miksing" (mešanje, miksovanje) podrazumeva mešanje različitih komponenata, ali tako da se tragovi pojedinačnih ...

  • Using technology for knowledge transfer between academia and enterprises

    Ivan Obradović, Ranka Stanković (2014)
    ... Đušina 7, 11000 Belgrade, Serbia * Corresponding author Structured Abstract Purpose –Advanced web technology offers possibilities for blending two complementary sources of knowledge, academic and entrepreneurial, within a single web-based framework. The main goal of our project is to ...
    ... terminology both in their mother tongue and in other languages. Practical implications –The proposed TEL platform opens a new dimension in OER by blending two major sources of knowledge: the academia and the enterprise. It thus contributes to the important task of preparing university students for ...
    ... a graduate student becomes partly outdated over the time. Although the acquisition of the two types of knowledge is separated, the need for blending of academic and entrepreneurial knowledge has been recognized (Etzkowitz, 2004). Namely, students are exposed to practical knowledge during their ...

  • Using Metadata For Content Indexing Within An OER Network

    Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)
    ... paper outlines the ICT solution for a metadata portal indexing open educational resources within a network of institutions.The network is aimed at blending academic and entrepreneurial knowledge,by enabling higher education institutions to publish various academic learning resources e.g. video lectures ...
    ... , reuse and redistribution by others with limited or no restrictions is rapidly gaining popularity [1].Based on these two facts, the BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology Enhanced Learning, http://www.baektel.eu) project was initiated with the main goal of building ...
    ... paper outlines the ICT solution for a metadata portal indexing open educational resources within a network of institutions.The network is aimed at blending academic and entrepreneurial knowledge,by enabling higher education institutions to publish various academic learning resources e.g. video lectures ...

  • Terminological and lexical resources used to provide open multilingual educational resources

    Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić (2016)
    Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...
    otvoreni obrazovni resursi, leksički resursi, obrada prirodnih jezika, terminologija
    ... ZLATIĆ University of Belgrade, Faculty of Mining and Geology, bojan.zlatic@rgf.bg.ac.rs Abstract: Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages ...
    ... materials. Firstly, a brief history and current state of the art of terminological resources are presented, followed by an overview of BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) resources, lexical resources, the process of terminology extraction and ...
    ... Methods, and Applications. Amsterdam: John Benjamins, 1999, pp. 115. [5] I. Obradović, R. Stanković, J. Prodanović and O. Kitanović, “A TEL platform blending academic and entrepreneurial knowledge,” in Proc. 4 th Conference on e- Learning, 2013, pp. 65–70. http://termi.rgf.bg.ac.rs/ [6] R. Stanković ...

  • Approach to operational mine planning: Case study Tamnava West

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Ranka Stanković (2014)
    ... kvalitetom uglja ("Coal quality management"), University of Belgrade, Faculty of mining and geology, Belgrade. 3 Carpenter M.A., 1995, Coal blending for power stations, IEA Coal Research, London 4 Wall. T et. al, 2001, A review of the state of the art in coal blending for power generation ...
    ... size optimization of blending piles, Fourth World Conference on Sampling & Blending, The Southern African Institute of Mining and Metallurgy 7 Stevanović D, Kolonja B, Stanković R, Knežević D, Banković M, 2013, Application of stochastic models for mine planning and coal quality control, 2013 ...
    ... the variable nature of coal properties (heating value, sulfur, ash), even within the same coal seam. In order to ensure a normal and efficient operation of the power plants fed with coal it is necessary to reduce the variation of the coal and that is done through coal homogenization process ...

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... OER and other supporting TEL content including audio, video and written text materials, published by partners involved in the Tempus BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology Enhanced Learning), provides searching capabilities for any type of published content. It ...
    ... that most of them use existing solutions (like Youtube and edX) and smaller number develop their own solutions. Curriculum is usually mapped from blending learning with additional possibilities of OER and MOOC. Teaching methodology is related to specific teaching style of teachers who use OER. It ...
    ... the petroleum company NIS Company (nis.eu) took part in developing OERs in order to connect industry with educational institutions and provide blending learning. Also, OER development is recognized at University level. At most Universities in Serbia groups for open science are formed. Almost all ...

  • Analiza uporednog praćenja temperature površine ohlađenih materijala pri njihovom zagrevanju do ambijentalne temperature

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Katarina Nestorović (2021)
    U datom eksperimentalnom radu su termografskim metodama ispitivane termofizičke karakteristike različitih materijala. Za ispitivanja su izabrani mesingani niovčić, ugalj i pelet, jer imaju različita termoizolaciona svojstava i različito stanje površine. Uzorci su najpre hlađeni, a zatim je njihovo zagrevanje na sobnoj temperaturi praćeno termalnom kamerom. U drugom delu eksperimenta, korišćena je impulsna termografija, a zagrevanje površine uzoraka vršeno je svetlosnom pobudom.
    termografija, impulsna termografija, nedestruktivno testiranje materijala, mesing, ugalj, pelet

  • Coal cleaning before combustion – practice and experience in Serbia

    Milena Kostović, Ivana Simović, Nebojša Kostović, Nina Pantelić (2022)
    Lignit, Čišćenje uglja, Kvalitet uglja, Termoelektrane

  • A bilingual digital library for academic and entrepreneurial knowledge management

    Ranka Stanković, Cvetana Krstev, Biljana Lazić, Dalibor Vorkapić (2015)
    A generic knowledge management process of organization, storage and retrieval of knowledge can suitably be fitted in a digital library. In the digital and knowledge age digital libraries can be used in knowledge management to handle intellectual assets and support knowledge creation. A multilingual digital library either stores content in more than one language or provides multilingual query access to monolingual content. In Serbia 18 of 308 scientific journals regularly published are bi-lingual, with papers simultaneously being in English ...
    Knowledge management, Digital library, Multilingualism, Language Resources, Terminology
    ... of bilingual documents. All TEMPUS1 projects have an obligation to publish reports and results bilingually, including the BAEKTEL project2 (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning). In this paper we will illustrate the capabilities of the developed system ...
    ... is currently participating in the project 17 Blending academic and entrepreneurial knowledge and technology enhanced learning. His interests include the implementation of new services for e-learning ...

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.

  • Mine ventilation system planning using genetic algorithms

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...
    coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methods

  • Status and tendencies under development and application of underground coal gasification-UCG

    David Petrović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić (2018)
    Podzemna gasifikacija uglja u Svetu poslednjih decenija doživljava znatnu ekspanziju u istraživanju i razvoju zbog uveliko iskorišćenih ležišta uglja i loših ekoloških efekata (pri sagorevanju u TE) na životnu okolinu. Srbija ima znatne rezerve uglja, a kada bi se za PGU koristile samo vanbilansne rezerve i otkopni ostaci bilansnih, jasno je kakvi bi bili ekonomski (a i energetski i ekološki) efekti. U radu su sagledane aktivnosti u Svetu na tom planu, pa smatramo da ima smisla i potrebe za primenu ove ...
    energetika, ugalj, ekologija, gasifikacija

  • Wells calculation for the protection of opencast mine Radljevo North from groundwater

    Dušan Polomčić, Vladimir Petković, Miloš Jeremić (2018)
    Za projektovanje kvalitetnog sistema zaštite jednog površinskog kopa od podzemnih voda bitno je da ulazni podaci budu verodostojni, kako bi se na osnovu njih izvršili potrebni proračuni objekata odvodnjavanja podzemnih voda. Proračunima za površinski kop Radljevo Sever je omogućeno da se dobije potreban broj bunara kako bi oni pravilno funkcionisali i obezbedili potrebno obaranje podzenih voda.
    Radljevo, ugalj, odvodnjavanje, bunari

  • Advantages and challenges in presenting mathematical content using EDX platform

    Marija Radojičić, Ivan Obradović, Ranka Stanković, Olivera Kitanović, Roberto Linzalone (2016)
    ... ispit in Serbian) is created within the Open edX platform which is used as the educational platform of choice within the Tempus project BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology Enhanced Learning). This project has put together partners from Western Balkans and EU ...

  • The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers

    Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović (2019)
    One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...
    open-cast coal mine, auxiliary works, bulldozers, optimization, availability
    ... the 10141 cost of coal excavating mehtioned cost are fFom about 1.5-2 6 АП this points to the importance of choosihng adequate туре of bulldozer. 4lso, this paper defines the optimal bulldozer replacement period within the life cycle of that machihe. Keywords: Open-cast coal mine, auxiliary works ...
    ... time of bulldozers use is in direct relation with the coefficients of the time and capacity ш таноп ој the continuous system јог the excavatioh ој coal апа tailings, which indicafes their importance. More than 100 bulldozers have been hired оп the ореп-сазт lignite mines of Electric Power Гтаизту of ...
    ... works, bulldozers, optimization, availabilifty. 1. INTRODUCTION Dozers are most common auxiliary machines at open-cast coal mines, both by type and the scope of tasks these machines can be used for. In the open-cast lignite mines of Electric Power Industry of Serbia (hereinafter designation EPS), ...