Претрага

Упит dcterms_subject_txt:Solid solution

320 items

  • Komparativna analiza završnih kontura površinskog kopa Drmno

    Dejan Stevanović, Dragan Ignjatović, Tomislav Šubaranović, Mirjana Banković, Petar Marković (2022)
    Definisanje optimalne završne konture površinskog kopa od suštinskog je značaja za ostvarivanje strateških ciljeva u razvoju rudarskih projekata. Savremeni programski paketi i metode za optimizaciju granica kopa, zasnivaju se na pronalasku završne konture koja obezbeđuje maksimalan profit. U slučaju površinskih kopova uglja, kod kojih osim profita postoji i čitav niz dodatnih kriterijuma i strateških ciljeva, princip optimizacije granica prema profitu, najčešće nije u potpunosti primenjiv. Iz rog razloga za uspešno definisanje granica površinskih kopova, neophodno je sagledati čitavu lepezu ...
    završna kontura, ugalj, komparativna analiza, optimizacija, strateški ciljevi

  • Towards a Mining Equipment Ontology

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... English. Definition in another language can also be obtained by selecting one of the translational equivalents (in this case English). The software solution developed enables the management of mechanization identification and classification, general maintenance data, structure (components) and technical ...
    ... of commissioning, etc. Technical characteristics of the selected excavator are entered on the panel depicted in Figure 6. 7 The software solution realized in this way enables linking with other related components, which enable the registering of realized an planned production for each day, ...
    ... would arise in the case of homonyms, with two different classes having the same identifier. Using a number only would not be intuitive, hence the solution that combines the two elements within the class identifier. Within the export of a specific concept subset form RudOnto to OWL, the basic Serbian ...

  • Developing Students’ Mining and Geology Vocabulary Through Flashcards and L1 in the CLIL Classroom

    Lidija Beko, Ivan Obradović, Ranka Stanković (2015)
    ... and reconstructed in novel ways according to learners’ needs, speed and fluency. For this aim, it is of equal importance to find a suitable IT solution which would be user-friendly, enable students to fill in a ready-made form and allow the professor to check, give feedback and mark the answers ...
    ... established quality standards. This allows the database to be continually enriched, always adhering to certain quality criteria. Our programming solution has been developed through Intranet, a php web application which students and professors may access by using a domain account, whereas assignments ...
    ... mining and geology terminology. Our suggestion is, therefore, the usage of the in-house FlashCards, RudOnto and GeolISSTerm combined as the optimal solution to enhance the acquisition of specific terminology and facilitate the usage of contemporary engineering literature. 9. REFERENCES Auerbach, ...

  • WebGIS Cadastre of Abandoned Mines in Autonomous Province of Vojvodina

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2015)
    ... recultivation with supporting multimedia records (photographs) for each abandoned mine on the territory of AP Vojvodina respectively. The software solution provides for viewing, search, and classification of abandoned mines by priorities based on defined criteria. When creating the database, special ...
    ... using the free and open source technology that enables connection to similarly configured data exchange networks. This approach offers a long-term solution for the storage and exchange of data without commercial software. USGIN makes available, connects and opens the data related to the earth sciences ...
    ... as ArcGIS Explorer, ArcGlobe, and Google Earth, can read and interpret these services [12]. 3.2 WebGIS The development of the software solution is compliant with recommendations related to spatial data infrastructure (SDI), as a data infrastructure implementing a framework of geographic ...

  • An oilfield in Libya: A new model to enhance waste water disposal

    Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković (2016)
    нафта, лежишне воде, припрема

  • Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković (2019)
    Hidraulični bageri primenjuju se u različitim oblastima privrede a najzastupljeniji su u građevinarstvu i rudarstvu. Na površinskim kopovima sa kontinualnim sistemima, klasifikuju kao pomoćna mehanizacija a na površinskim kopovima sa diskontinualnim sistemima, kao osnovna mehanizacija. Kako je u oba slučaja njihova primena neizostavna, važno je izvršiti adekvatnu analizu postojećih podataka, u cilju optimizacije izbora tipa hidrauličnog bagera u odnosu na uslove rada datog površinskog kopa. U radu su opisane različite višekriterijumske metode koje su korišćene za analizu hidrauličnih bagera. ...
    višekriterijumske metode, površinski kop uglja, pomoćna mehanizacija, hidraulični bager
    ... Barns  TOPSIS - Technique for Order of Preference by Similarity to Ideal Solution [10], Ching-Lai Hwang  VIKOR - VIseKriterijumska Optimizacija i Kom- promisno Resenje (Multicriteria Optimization and Compromise Solution) [11], S. Opricovic  ELECTRE (I, II, III, IV) - franc. ELimination Et ...
    ... organization method for enrichment evaluation), TOPSIS (Technique for Order of Prefe- rence by Similarity to Ideal Solution), VIKOR (Multi- criteria Optimization and Compromise Solution) i ELECTRE (ELimination and Choice Expressing RE- ality). Navedene višekriterijumske metode pružaju mogućnost up ...

  • Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

    Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)
    γ-spectrometry, brushite, chukhrovite, phosphogypsum, radionuclides, recrystallization
    ... 120 cm? cylindrical geometry (Pantelić et al.,, 2015), spiked with standard radioactive solution ERX 9031-OL-427/12 (Czech Metrology Institute, Inspectorate for lonizing Radiation). The radioactive solution contained MTAm, 109cd) lšQCe) 57CO, 6OCD, 137CS, ZOSHg) ll}sn) XSSr, BSY and ZlOPb ra ...
    ... samples. Clay Minerals Raw phosphogypsum Dissolved gypsum + Residuum 1 Filtration DEŠOLO Bp l T=90"C Recrystallized gypsum| + Solution 1Filtration Recrystallized 8ypsum Fig. 2. Schematic overview of the recrystallization process. Inductively coupled plasma optical emission ...
    ... replacement of SOŽ with HPO?T within the crystal structure of gypsum; or (3) shifting of the HPO? + H,O > H,POx+OH- equilibrium in the neutral water solution to the left compared to the highly acidic conditions of phosphate rock digestion with H,SO,. (Ca(H.)POu), has 100 times greater solubility than ...

  • Multiword Expressions between the Corpus and the Lexicon: Universality, Idiosyncrasy and the Lexicon-Corpus Interface

    Verginica Barbu Mititelu, Voula Giouli, Kilian Evang, Daniel Zeman, Petya Osenova, Carole Tiberius, Simon Krek, Stella Markantonatou, Ivelina Stoyanova, Ranka Stankovic, Christian Chiarcos (2024)
    Predstavljamo trenutne aktivnosti na definisanju interfejsa leksikona i korpusa koji će služiti kao referenca u prikazu polileksemskih jedinica - višečlanih izraza - (različitih tipova - imenskih, glagolskih, itd.) u specijalizovanim leksikonima i povezivanju ovih unosa sa njihovim pojavljivanjima u korpusima. Konačni cilj je korišćenje ovakvih resursa za automatsko identifikovanje višečlanih izraza u tekstu. Uključivanje nekoliko prirodnih jezika ima za cilj univerzalnost rešenja koje nije usredsređeno na određeni jezik, kao i prilagođavanje idiosinkrazijama. Raspravljaju se izazovi u leksikografskom opisu višerečnih ...
    multiword expression lexicon, corpus, proof-of-concept lexicon encoding

  • Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu

    Marija D. Prekajski (2014-04-04)
    Nanoprahovi kristalnih faza iz serije čvrstih rastvora u pseudo-binarnom sistemuCeO2-Bi2O3 sintetisani su primenom jednostavne i ekonomične samopropagirajućemetode na sobnoj temperaturi korišćenjem nitrata metala i natrijum-hidroksida kaopolaznih supstanci. Osim krajnjih članova niza, CeO2 i niskotemperaturne polimorfnemodifikacije α-Bi2O3, sintetisani su i čvrsti rastvori nominalnog sastava Ce1-xBixO2-δ,gde je x = 0,1; 0,2; 0,3; 0,4; 0,5; 0,6; 0,7; 0,8; 0,9. Rezultati proučavanja metodomrendgenske difraktometrije na polikristalnom materijalu i ramanske spektroskopskeanalize pokazali su da su sintetisani prahovi sa nižim sadržajem bizmuta (x = 0,1 ...
    nanostrukturni materijali, čvrsti rastvori, CeO2, Bi2O3, rendgenskadifraktometrija praha, Ritveldova metoda, mikrostrukrurna analiza

  • Kristalne strukture Cs2HoSi4O10F i Cs2TmSi4O10F

    Predrag Dabić, Sabina Kovač, Aleksandar Kremenović (2021)
    ... Cs2TmSi4O10F were obtained in form of single crystals. The compounds were synthesized by the method of crystal growth from a high-temperature solution (Tmax = 1373 K) using REE2O3 (REE = Ho, Tm), SiO2 and CsF as starting materials. The crystal structures of both compounds were determined by sin ...

  • Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić (2019)
    We have developed a technique to calculate lateral density distribution of the sedimentary basin basement by combining linear gravity–density inversion and 2D forward modeling. The procedure requires gravity anomaly data, depth-to-basement data and density data for the sediments (density–depth distribution). Gravity efect of density variations in the basement was extracted from the total gravity anomaly by removing the joint efect of the sediments with vertical density variations and homogeneous basement of average density contrast (calculated by 2D modeling). Gravity ...
    funkcije raspodele gustine, lateralna raspodela gustine, karta gustine podloge

  • LRMI markup of OER content within the BAEKTEL project

    Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić (2015)
    ... examples by enterprise experts. The resources can be published in different languages, with support for their translation [6]. The ICT solution for BAEKTEL OER framework comprises a central repository with OER resources and the BAEKTEL Metadata Portal (BMP). All project partners develop ...
    ... BMP is providing all important information on the network resources, thus enabling their search and browse. [7] The development of the ICT solution for the BAEKTEL metadata portal is based upon a metadata schema that contains elements taken from standard namespaces with guidelines for metadata ...
    ... material we tag with detailed microdata, the more “findable” our content and educational resources will be for teachers and students. The solution for LRMI implementation within BAEKTEL metadata portal outlined in this paper enables efficient search and browse of OER content and provides ...

  • 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)
    ... after modification with different concentrations of organic complex (HDTMA and PTMA), whereas inorganic modification was performed with IM NaCI!I solution. The interaction between minerals and herbicide was monitored using infrared spectroscopy. IR bands observed in the inorganic modified montmorillonite ...
    ... m bromide and phenyltrimethylammonium 3chloride. The organoclay complexes were prepared by dropwise addition of 100 mL of HDTMA or PTMA aqueous solution, with appropriate concentration of organic complex, into the aqueous suspension of the NaM clay. Four different concentrations of organic cations ...
    ... complex, 3P- 0.75 CEC saturated with PTMA complex, and 4P- I CEC saturated with PTMA complex. All samples are then treated with 1000 mg/L working solution of S-metolachlor and marked as NaM-SM, 1H-SM, 2H-SM, 3H-SM, 4H-SM, IP-SM, 2P-SM, 3P-SM, and 4P- SM. FTIR spectroscopy All samples were investigated ...

  • Речници у дигиталном добу - информатичка подршка за српски језик

    Биљана Рујевић (2022)
    Морфолошки речници српског језика представљају електронски језички ресурс који има значајну историју развоја и коришћења за потребе обраде природних језика. С обзиром на то да су чувани у облику датотека чији је број нарастао па је самим тим управљање речницима постало отежано јавила се потреба за смештањем информација из речника у облик лексикографске базе. Како би се омогућио симултани рад на развоју речника за више корисника јавила се потреба за веб-апликацијом заснованој на лексикографској бази. Како би се размотриле ...
    електронски речници, лексикографска база података, лексички ресурси, српски језик

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... of this method is the numerical solution of the wave equation for the sucker rod string. This requires knowledge of the pumping unit characteristics and assumed pump operating. conditions in order to define the boundary condit io ns used to create the solution. There are several sources for ...
    ... cross-section of the annular space of the anchor without gas (m/s) 3.3 Sucker Rods Sucker rods are manufactured from high-quality steel with a solid round cross-section and are used to transmit energy from the surface equipment (horsehead) to the downhole pump. Their lengths range from 7.62 meters ...
    ... to abrasive damage. Nickel-carbide cylinders have a steel base over which a nickel coating with small 13 carbide particles is applied. This solution offers advantages in terms of strong structure due to the steel base, while the nickel-carbide coating makes the cylinder resistant to many corrosives ...

  • Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)

    Nevenka Novaković, Predrag Dabić, Vesna Matović (2023)
    Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...
    Raspadanje, Indeks oštećenja, Zatrpavanje, Fizička svojstva, Kersantit

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... of climate change. Two approaches are currently being used: solid and liquid DAC. Solid DAC is based on solid adsorbents operating under low pressures and a temperature range between 80 and 120%-. Liquid DAC requires an aqueous solution, usually a potassium hydroxide which releases the captured CO>» ...
    ... column in which the solvent absorbs CO-». The CO-»-rich solution is fed into a heater to increase the temperature of solution, then to a stripper column to release the CO-. The released CO- is compressed, and the regenerated absorbent solution is cooled and recycled to the absorber colum. Figure 2 ...
    ... include adsorption, absorbtion, membrane based and chemical looping are analyzed. 2.1. Adsorption based Carbon Capture CO- capture over porous solid materials is an increasing separation technique to remove CO»- selectively from gas streams in various industries. A variety of adsorbents have been ...

  • 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
    ... query mechanism. EgoMath is yet another software solution, which allows semantic search of mathematical content [9]. It supports indexing and search of mathematical content on the web using a full text search engine. To that end the solution uses linearization, transformation rules, generalization ...
    ... with ordinary text. Another relevant project is MathGo! that provides search and presentation of mathematical encoded text [8]. The software solution is based on the concepts of math block identification and vector representation, with special attention paid to the search of mathematical topics ...

  • Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia

    Dragoljub Bajić, Dušan Polomčić (2014)
    A groundwater control system was designed to lower the water table and allow the pumping sta-tion “Bezdan 1” to be built. Based on a hydrodynamic analysis that suggested three alternative solutions, mul-ticriteria optimization was applied to select the best alternative. The fuzzy analytic hierarchy process methodwas used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selec-tion of the best alternative, as well as fuzzy optimization calculations, yielded the “weights” of the alternativesand the ...
    groundwater lowering, groundwater management scenario, fuzzy analytic hierarchy process,expert knowledge, triangular fuzzy numbers, linguistic variables
    ... “Bezdan 1” pumping station. Fig. 2. Lowering of the water table, alternatives 1, 2 and 3, as a result of control system operation. above, the solution produced by hydrodynamic calcu- lations was optimized by means of fuzzy extent analy- sis, an FAHP approach proposed by (CHANG 1996). This method ...
    ... zdan 1” PS. Fuzzy optimization calculations included assessments of the various factors/criteria that affect- ed the selection of the best possible solution to the problem. In general, it is difficult to produce an alter- native that will instantaneously satisfy all the applica- ble criteria, but an acceptable ...
    ... Based on these calculations, the ultimate evaluation of the alternatives is shown in Table 2. The criteria-based assessment showed that the best solution for the groundwater control system of the “Bezdan 1” PS was Alternative 2. Here the control system is comprised of 12 wells. It takes seven days to ...

  • Control of substructure construction of railways in the Republic of Serbia

    Dragan Lukić, Dragoslav Rakić, Irena Basarić Ikodinović (2022)
    Контрола збијености природног тла (у ископу) или збијеног у насипу при изградњи саобраћајница представља један од основних облика контроле квалитета доњег строја. Код изградње брзих саобраћајница (аутопутеви и брза железница) приоритет је постизање високог нивоа контроле извршених радова. У циљу онемогућавања диференцијалног слегања (при изградњи насипа), или промене запремине услед допунског збијања материјала, које неминовно доводе до деформација, потребно је извршити оптимално збијање материјала. У оквиру овог рада приказује се техничка регулатива која регулише контролу збијености при изградњи железничке ...
    доњи строј, техничка регулатива, насип, збијеност, контрола
    ... applied in practice (during construction). Also, the paper points out the shortcomings of such application of control and the proposal of a possible solution. 2. EXISTING TECHNICAL REGULATIONS This chapter presents the conditions for controlling the compaction of the protective layer, transition layer ...
    ... outside of the transition layer for the purpose of controlled drainage of polluted water (or other liquids), and according to the pollution protection solution. The transverse slopes of the planum are 5%, with a protective layer being formed on the embankments up to the edge of the embankment, and in the ...
    ... 4 of this regulation for the transition layer. *in the Regulations Dpr 3. ADOPTED PRACTICE OF CONTROL OF COMPACTIONS, SHORTCOMINGS AND PROPOSED SOLUTION In the last few years, the Republic of Serbia has been working on the reconstruction of existing railways, construction of new high-speed railways ...