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Упит dcterms_subject_txt:mineral properties

395 items

  • Opremanje bušotine X zavojnom pumpom

    Milan Filipović (2024)
    Ovaj rad se bavi osnovnim pojmovima i karakteristikama zavojnih pumpi.Prikazan je sklop zavojnih pumpi i njena prateća oprema. Objašnjen je princip rada zavojnih pumpi kao i uloga svakog mašinskog elementa koji se nalazi u pumpi. Razmotrene su prednosti i nedostaci primene ovih primarnih mehaničkih metoda eksploatacije ugljovodonika. Dat je uvid u inovativna rešenja problematike primene zavojnih pumpi. Na konkretnom primeru bušotine X su prikazani problemi kao i rešenja primene ovih primarnih mehaničkih metoda u praksi. Napravljena je detaljna analiza ...
    zavojne pumpe, oprema, primarne mehaničke metode, ugljovodonici, analiza rada
    ... slici 12: CONTAMINANT MOLE FRACTIONS & Edit'BoFluid' FLUID Name: Black Oil| Save as template Description: Properties Viscosity | Calibration | Thermal STOCK TANK PROPERTIES Watercut v: 80 % CO2 fraction: GOR Y 18.2692 sm3/sm3 H2S fraction: Gas specific gravity: |O.0636 N2 fraction: ...
    ... lošije zaštićena. Viskoznost i termalne osobine fluida su prikazane na slici 13 i 14. & Edit'BOFluid' FLUID Name: Black Oil Description: Properties ' Viscosity | Calibration | Thermal UNDERSATURATED OIL Correlation: 'Vasquez & Beggs LIVE OIL Correlation: Chew & Connall& DEAD OIL ...
    ... C)Calculate 60 % i e | +Properties | Viscosity | Calibration | Thermal Specific heat capacity Thermal conductivity Gas 2.30274 k)/(kg.K) + |0.0346 W/(m.K) Oil 1.88406 KJ/(kg ...

  • Praktikum za vežbe iz Informatike 1

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Mirjana Banković (2014)
    informatika

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... with geological exploration of ore deposits. It is primarily related to the complexity of geologic structures and the physical and mechanical properties of rocks. In such circumstances, engineer experience is especially im- portant. Several interesting studies addressing, the fuzzy logic concept ...
    ... their com- mon structural evolution. They, too, are well stratified and the thickness of the strata mostly ranges from 0.1 to 2 m. Geomechanical properties were particularly investigated in the ore deposit zone, where tectonic transport was most distinct, and found to be rather unfavourable. The ...

  • 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 (2018)
    нафтна геологија, геотермална енергија, Панонски басен

  • Remedijacija otpadnih voda Rudnika prirodnim zeolitom

    Igor Veličković (2024)
    U radu je razmatrano prečišćavanje otpadnih flotacijskih voda sa područja rudnika Rudnik prirodnim zeolitskim tufom sa planine Jastrebac. Prečišćavanje otpadnih flotacijskih voda sa područja rudnika Rudnik prirodnim zeoliskim tufom sa obronaka planine Jastrebac pokazala se veoma efikasnom. Naime, u tri otpadne flotacijske vode utvrđen je povišen sadržaj arsena, hroma, gvožđa, mangana, kao i nikla. Jednostavnim tretmanom zeolitskim tufom iz ovih voda uklonjeni su svi ovi elementi. Sadržaji gvožđe i mangana su sniženi od 95 do 99 %, dok su ...
    flotation waste water, zeolite tuff, purification
    ... velikim katjonima. Dehidratacija ovih minerala Je obično reverzibilna i odvija se na temperaturama ispod 400 ?C. Zbog složenosti hemijskog sastava nekih zeolita, uočeni su podčlanovi sa dominantnim katjonima, koji predstavljaju seriju sa jedinstvenim imenom minerala, uz oznaku dominantnog katjona. Na ...
    ... karakteristikama (Tošović, 2000). Rudna tela obuhvataju više od 70 rudnih minerala među kojima preovlađuje pirotin, a slede ga (prema relativnoj zastupljenosti) sfalerit, galenit, halkopirit, arsenopirit, pirit, markasit, Bi minerali, Ag sulfosoli i Au-Ag teluridi, dok su ostale faze prisutne u zanemarljivim ...
    ... modifikaciju, a efikasnost uklanjanja toksičnih elemenata Jje sasvim zadovoljavajuća. 30 9. LITERATURA Benashvili, E.M. 1988. Occurrence, Properties and Utilization of Natural Zeolites, D. Kallo, H. S. Sherry, Eds., Akademiai Kiado, Budapest, 1988, pp. 589—597. Brković, T., Radovanović, Z ...

  • Keyword Extraction from Parallel Abstracts of Scientific Publications

    Slobodan Beliga, Olivera Kitanović, Ranka Stanković, Sanda Martinčić-Ipšić (2017)
    ... English languages. The keywords are extracted by a selectivity-based keyword extraction method. The method is based on the structural and statistical properties of text represented as a complex network. The constructed parallel corpus of scientific abstracts with annotated keywords allows a better comparison ...
    ... since it requires no semantic or syn- tactic preprocessing of the input text. Network enabled keyword extraction meth- ods exploit various structural properties (usually centrality measures) of the nodes in a network for the extracting and ranking of keyword candidates [1]. The selectivity-based keyword ...
    ... phase (called keyword extraction in the SBKE method). Usually, SBKE performs better on longer texts (containing more information on the structural properties of the input text), but here we can explore the performance on the shorter texts [8]. The achieved results suggest that SBKE can be applied to shorter ...

  • 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
    ... de formes Fléchies) (Courtois and Silberztein, 1990). A single DELAS entry consists of a word lemma and its inflective, semantic, and syntactic properties. Here is an example of a simple vocabulary entry for the word lemma “bibliotekar” (librarian): bibliotekar,N2+Hum+Prof Record starts with the lemma ...
    ... the LexProperties table. Examples of lexical entry markers are the marker “+Tr” for transitive or “+Iref” for ireflexive verbs. The FormGramCat- Properties table contains the grammar categories that occur in the DELAF dictionary. Examples of such grammar codes are “1” for the nominative case, “2” for ...
    ... i bibliotekar” (in Figure 6). On this panel privileged users can edit the entry information from the database, as well edit, add or remove other properties. The panel consists of two visually separate parts, the upper part refers to the lemma and the lexical record in general, while the lower part refers ...

  • Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi: Criteria optimization, Belgrade, June 2024

    Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek (2024)
    multi-criteria decision-making, definition of criteria, underground exploitation

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)
    ... geological vocabularies, collections of terms and text definitions of things thought to exist in a domain or collections of possible values for properties. The terms in the vocabularies are used to classify observations/interpretations, or to specify attribute values. Observation implements field ...
    ... cartographic presentation. Ranka Stanković 67 Description is implemented as an instance of observation or interpretation, e.g. a collection of properties with assigned values (e.g. attributes) that characterize some geological occurrence. The description tables of basic geological entities (mapped ...

  • Legal framework for recultivation of degraded areas caused by mining exploitation

    Radmila Gaćina (2023)
    Prilikom površinske i podzemne eksploatacije uglja eksploatacioni sistemi oštećuju veće ili manje površine zemljišta. Iskustva pokazuju da su oštećenja zemljišta znatno veća kod površinske eksploatacije, gde je prostora degradiran ne samo u konturi rudnika i okoline, već se promene takođe dešavaju u prirodnom okruženju. U članku su predstavljeni rezultati studije zakonskih okvira rekultivacije u nekim zemljama sveta i u Srbiji. Praktično iskustvo rekultivacije pokazalo je da iskorišćenje i devastacija tokom rudarske aktivnosti predstavljaju opasnost ne samo za pogođena ...
    rekultivacija, melioracija, otkopavanje uglja, zakonska regulativa
    ... the main content should include: reclaimed land area, surface cover thickness, ground slope and drainage function, the physical and chemical properties of the soil are in line with the standards of arable land, and the failure to meet the acceptance criteria, should not pass the acceptance (Guo ...
    ... degraded land Reclamation represents restoring or giving the usable values to degraded land by appropriate land modelling, improvement of grounds properties, water regulation, soils restoration and roads construction. Rehabilitation means the return to the natural state according to the original ...
    ... g of the recultivation obligation policy in the Mining Act based on the understanding of preventing environmental damage and also for humans. Mineral and coal mining often increases soil density, erosion, sedimentation, landslides, disruption of flora and fauna, and disruption of public health ...

  • Data from the Digital Repository of the Faculty of Mining and Geology in eScience (eNauka)

    Biljana Rujević, Mihailo Škorić (2024)
    The paper describes linking the Digital Repository of the University of Belgrade, Faculty of Mining and Geology, with the eScience system in terms of transferring metadata about the results of researchers' scientific work. The steps taken to ensure a smooth harvesting of metadata are outlined. Additionally, a presentation of additional improvements to the OAI system is provided, aiming to contribute to the automatic linking of authors with their results in the eScience system.
    репозиторијуми, еНаука, метаподаци, Рударско-геолошки факултет

  • Prezentacija projekta "Zaštita ležišta mineralnih sirovina kao osnova sigurnog snabdevanja mineralnim sirovinama u Evropi (safemin4europe)

    Vladimir Simić, Rade Jelenković, Dragana Životić, Zoran Miladinović, Stefan Petrović, Marija Petrović (2022)
    Harmonični ekonomski razvoj svake zemlje u velikoj meri zavisi od dostupnosti sirovina, naročito mineralnih sirovina. Obezbeđivanje njihove dovoljne količine na tržištu (ponude) je od vitalnog značaja za funkcionisanje različitih industrijskih grana koje proizvode različitu robu i opremu neophodnu za ispunjavanje životnih potreba stanovništva kao i za efikasnu poljoprivredu. Mineralne sirovine su neophodne za podršku ekonomskim aktivnostima na lokalnom, regionalnom, nacionalnom i međunarodnom nivou. Ovo su, istorijski, prve sirovine koje su počele da se koriste iz domaćih izvora, i u ...
    ležišta mineralnih sirovina, valorizacija, zaštićena područja, socijalni aspekti

  • Површинско распадање керсантита из Тешића мајдана у корелацији са начином обраде на примеру малог степеништа (Београдска тврђава)

    Невенка Новаковић (2024)
    Архитектуру Београда на прелазу 19. у 20. век обележила је употреба керсантита из каменолома Тешића мајдана. Kao камен високих декоративних својстава, керсантит је коришћен за јавне споменике, делове или потпуну изградњу објеката (Народна скупштина Србије, Мало степениште, Народни музеј и др.). Како очување споменика културе изискује познавање својстава уграђеног камена, истраживања су обухватила детаљно проучавање петролошких, хемијских и физичких карактеристика керсантита из Тешића мајданa и узорака камена из споменика Мало степениште (студија случаја). Након детаљног мапирања стања керсантита, лабораторијских ...
    керсантит, Мало степениште, споменик културе, архитектонски камен, физичко-хемијско распадање, мапирање, форме распадања, површинска обрада

  • Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels

    Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković (2023)
    drilling fluid formulation, upstream oil and gas, fluid dynamics, fluid loss control, gel

  • Димензионисање система завојних пумпи

    Марија Дивац (2024)
    Овај завршни рад се бави димензионисањем система завојних пумпи (Progressive Cavity Pumps - PCP) које се широко користе у нафтној и гасној индустрији, нарочито за подизање тешких и вискозних флуида. Завојне пумпе су се показале као ефикасно решење у бушотинама са сложеним условима,захваљујући својој способности да транспортују флуиде са високим садржајем чврстих честица и гаса.Рад обухвата анализу кључних параметара као што су вискозност, густина, дубина бушотине и притисак, који су пресудни за избор одговарајуће пумпе.Применом софтверског алата извршена је ...
    завојне пумпе, димензионисање, експлоатација нафте, вискозни флуиди, софтверска симулација, PCP пумпе
    ... 809.878 121.3612 9.1694 0.0254 & tEdit'Black Oil' B x FLUID Name: Black Oil Save as template Description: Properties | Viscosity | Calibration | Thermal STOCK TANK PROPERTIES CONTAMINANT MOLE FRACTIONS Watercut v 80 % ~ CO2fraction: 0.068 GOR Y 18.2692 sm3/sm3 ~. H2S fraction: 0 Gas ...
    ... y3HMa y 003Hp rycCTHHy, BHCKO3HTCT, IIpHTHCaK H TeMIIepaTyPpy. & Edit Black Oil' B x FLUID Name: - |BlackOil Save as template Description: Properties Viscosity | Calibration | Thermal UNDERSATURATED OIL MIXTURE Correlation: Vasquez & Beggs +| Emulsion viscosity method: Set to viscosity of the ...

  • A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)

    Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin (2016)
    ... comprises coal beds, fine Miocene sands, silt and clay. 3. METHODOLOGY A hydrogeologic model is an interpretation of the dynamic and physical properties of a hydrogeologic system (American Society for Testing and Materials, 2014). According to Polomčić (2001), a hydrologic system is determined by: ...
    ... inter-dependent. The characteristics of a hydrogeologic system are its geometry (i.e. spatial distribution of water-bearing media) and filtration properties. Hydrogeologic modeling is schematization of the hydrogeologic system, due to the hydrogeologic and hydrodynamic complexity of the conditions, ...

  • FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... certain dose of toxicity similar to parent herbicides (Hladik et al., 2006). Montmorillonite is a clay mineral widely used in various industries due to its specific physical and chemical properties, such as cation exchange capacity (CEC), large surface area, high pore volume, high swelling ability ...
    ... will also reduce their migration to groundwater. Certain experiments involved creating a stronger interaction between the mineral surface and the herbicide by making organo-mineral complexes. Montmorillonites previously modified with aromatic or aliphatic organic cations showed better sorption of certain ...
    ... ability, etc. Intercalation of organic complexes into montmorillonite layers changes surface properties from hydrophilic to hydrophobic. The results presented in this paper show that FTIR spectroscopy can be a valuable technique to examine the organic modification of montmorillonite as well as the interaction ...

  • Минерагенија зеолитских туфова Србије

    Vladan Kašić (2018-02-05)
    Лежишта наших зеолитских туфова (Златокоп, Игрош, Јабланица 1, Беочин, Топоница и Сланци) која су овде била предмет детаљних истраживања, просторно и генетски везана су за вулканске и вулканокластичне стене маринских средина сенонске и неогенске старости и језерске седименте неогене старости и настала су као продукт девитрификације вулканског стакла.Током лабораторијских испитивања при изради ове докторске дисертације, примењене су следеће аналитичке методе: оптичка испитивања петрографских препарата; рендгенска дифракција праха (XRD); скенирајућа електронска микроскопија (СЕМ метода); хемијска карактеризација зеолитских туфова у оквиру ...
    минерагенија, зеолитски туф, Србија, клиноптилолит, хојландит
    ... on acid–modified zeolitic mineral clinoptilolite. Chemical Industry63 (5), 407–414. Mercer B. W., Ames L. L., (1978): Zeolite ion exchange in radioactive and municipal wastewater treatment. In Sand L. B. and Mumpton F. A. (Eds.) Natural Zeolites, Occurrence, Properties, Use, Zeolite ’76, Tuscon ...
    ... redefined, The American Mineralogist, vol. 45, March-April,Am. Mineral. 45, 351-369. Mumpton, A. F., (1973): Worldwide deposits and utilisation of natural zeolites. Ind. Minerals, No.73., 30-45. Mumpton F. A. (1988): Occurrence, Properties and Utilization of Natural Zeolites. In D.Kallo and H. S ...
    ... испитивањима: минерали зеолита - серије хојландита, кварц, минерали глина (из групе монтморијонита), минерали фелдспата (углавном плагиокласи). Најдоминантнији минерал у узорку је минерал зеолита из серије хојландита (слика 3.6), док је садржај осталих пратећих минерала мањи. Остали минерали одређени ...

  • A Mathematical Learning Environment Based on Serbian Language Resources

    Radojičić Marija, Obradović Ivan, Stanković Ranka, Utvić Miloć, Kaplar Sebastijan (2018)
    In recent years, in line with ever growing usage of Information technology, the learning environments are changing. The amount of available learning materials in various forms has increased. These new environments demand comprehensive learning systems, which enable management of the learning corpus with special attention paid to relevant lexical resources. In this paper we present the concept of a Mathematical Learning Environment in Serbian (MLES), which is based on a corpus of mathematical materials and various lexical resources, enabling ...
    mathematical content, text processing, mathematical formulae
    ... Annotation also alleviates the statistical analysis of the corpus, namely automatic assignment of the distribution of annotated linguistic properties. 5. APPLICATION TERMI The Termi application has recently been launched to serve as a support for the development of terminological dictionaries ...
    ... updating terms either only in Serbian, or only in the English, or simultaneously in both languages. Term modification implies changes of the very properties of the term (name, abbreviation, synonyms and description) as well as modification of external connections of the term with the existing b ...

  • Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif

    Ljiljana Vasić, Laszlo Palcsu, Huang Fen (2019)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry