Претрага
557 items
-
Application of MCDA in the determination of optimal block size for open-pit modelling and mine planning
The process of creating a geological block model as the basis for a further detailed design and planning of mining operations is a very responsible task. Errors made during this initial process are transferred to all other phases of the mining project. Certainly, one of the most important decisions for the modelling process is the choice of the appropriate size of the blocks that form the model itself. The determination of the optimal block size is not a simple ...dimenzije minibloka, višekriterijumska analiza, AHP, modeliranje ležišta, planiranje na površinskim kopovimaPetar Marković, Dejan Stevanović, Milica Pešić Georgiadis, Mirjana Banković. "Application of MCDA in the determination of optimal block size for open-pit modelling and mine planning" in Underground Mining Engineering, Univerzitet u Beogradu, Rudarsko-geološki fakultet (2021)
-
Available technological procedures for capturing CO2 in the industrial and power generation sectors
Climate change is a major environmental issue caused by anthropogenic emissions of greenhouse gases. Capturing CO2 and storing it in suitable geological formations is one of the main technological solutions that can provide mitigation of CO2 emission into the atmosphere. Capturing CO2 represents the first phase in process of carbon capture and storage, and includes the application of various technologies for the separation of CO2 produced in the energy and industrial sectors. There are four main systems for capturing ...... Selexol (dimethylether of polyethylene glycol), Resticol process (methanol), Fluor process (propylene carbonate), Purisol (N-methyl pyrrolidone) and Morphysorb process (morpholine) [20-22]. The most important advantage of physical absorption process is relatively low capital and operating cost, and use ...
... are: technology is relatively simple, process can be carried out at atmospheric pressure, and there is no chemical solvents or other components [11,23,31]. The major disadvantage of this process is that large amount of energy is required to provide the cooling process [11]. Also, one of disadvantage is ...
... such as: capturing from industrial process stream, capturing after combustion, capturing before combustion and capturing CO2 by oxy-fuel (Figure 1). Figure 1. Simplified illustration of the main carbon capture processes [6] 2.1. Capturing from industrial process stream Industrial processes are ...Lola Tomić, Vesna Karović Maričić, Dušan Danilović, Branko Leković, Miroslav Crnogorac. "Available technological procedures for capturing CO2 in the industrial and power generation sectors" in 8th International Conference Mining and Environmental Protection, 22 – 25th September 2021, Serbia, Univerzitet u Beogradu, Rudarsko-geološki fakultet (2021)
-
BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties
Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition... polarization contribution of the ferrite phases [73,74]. The EIS analyzer software and equivalent circuit consisting of two parallel R-CPE elements connected in series were applied for the investigation of relaxation processes. The representative curve for BaTiOa/NiFe>Ou sintered at 1150 ?C, shown in ...
... the inves- tigated samples. It was noticed that the increase of conductive ferrite phases influenced the Tnorganics 2023, 11, 51 10 of 19 non-linear deviation, while the AC conductivity non-linearly increased with the increase in the frequency, most probably due to heterogeneous conduction and ...
... 10% 10 105 10 10 10 10 10 10 f[Hz] fi[Hz] Figure 10. Conductivity spectra of the sintered samples and their temperature dependence. The non-linear dependence in P-E measurements indicated typical behavior for ferro- electric composites where the structure inhomogeneity can lead to uncharacteristic ...Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković. "BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties" in Inorganics, MDPI AG (2023). https://doi.org/10.3390/inorganics11020051
-
CEEPUS mreža CIII-RS-0038 na Rudarsko-geološkom fakultetu u Beogradu: preko dve decenije doprinosa usavršavanju studenata i nastavnika
Kristina Šarić (2022)Kristina Šarić. "CEEPUS mreža CIII-RS-0038 na Rudarsko-geološkom fakultetu u Beogradu: preko dve decenije doprinosa usavršavanju studenata i nastavnika" in 18. Kongres geologa Srbije „Geologija rešava probleme”, Divčibare, 1-4 jun 2022., Beograd : Srpsko geološko društvo (2022)
-
Development of terminological resources for expert knowledge: a case study in mining
Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Aleksandar Cvjetić. "Development of terminological resources for expert knowledge: a case study in mining" in Knowledge Management Research & Practice, Palgrave Macmillan (2015). https://doi.org/10.1057/kmrp.2015.10
-
Threshold-induced correlations in the Random Field Ising Model
... separation of original avalanches in the thresholding process. The correlations are evidenced by power law distributed waiting times and are present in the system even when the original avalanche triggerings are described by a random uncorrelated process. �e Random Field Ising model (RFIM)1,2 has a great ...
... separation of original avalanches in the thresholding process. The correlations are evidenced by power law distributed waiting times and are present in the system even when the original avalanche triggerings are described by arandom uncorrelated process. Received: 3 January 2018 The Random Field Ising ...
... V(t), let V(t) > 0 at any moment of time t when system is active (otherwise, let V(t) = 0), and let the system evolution proceeds in time separated connected bursts of activity, called avalanches. Unlike in sim- ulations, where the avalanches are clearly identi�ed, the extraction of avalanches in experiments ...Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević. "Threshold-induced correlations in the Random Field Ising Model" in Scientific Reports, Springer Science and Business Media LLC (2018). https://doi.org/10.1038/s41598-018-20759-6
-
Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit
... equation of soil oscillation in the form of : ♦ Model 1 4410,2 1 52,131.2 Rv (21) whereby the linear dependence between log v and log R was obtained, expressed by the equation (21), with the linear correlation coefficient r amounting: r = -0,8613 Graphic survey of soil oscillation law is ...
... STATISTICAL CRITERIA To evaluate the degree of correlation between recorded (measured) and calcu- lated data in this paper, the coefficient of linear correlation r [5] was used between the logarithm of reduced distance R and the logarithm of the oscillation velocity v. Additionally, it was also ...
... 0.4 < ρ < 0.7 - significant coorelation, 0.7 < ρ < 1.0 - strong or highly strong correlation. The same is valid for the absolute val- ue of linear correlation coefficient r. As a convenience measure of the ob- tained functional relationship for the given experimental data, the criterion „3S“ ...Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić. "Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit" in Mining and Metallurgy Engineering Bor, Bor : Mining and Metallurgy Institute Bor (2015). https://doi.org/10.5937/MMEB1503053L
-
Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling
Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeBranislav Petrović, Veljko Marinović, Zoran Stevanović. "Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling" in Environmental Earth Sciences, Springer Science and Business Media LLC (2023). https://doi.org/10.1007/s12665-023-10911-5
-
Knowledge and Rule-Based Diacritic Restoration in Serbian
In this paper we present a procedure for the restoration of diacritics in Serbian texts written using the degraded Latin alphabet. The procedure relies on the comprehensive lexical resources for Serbian: the morphological electronic dictionaries, the Corpus of Contemporary Serbian and local grammars. Dictionaries are used to identify possible candidates for the restoration, while the dataobtainedfromSrpKorandlocalgrammarsassistsinmakingadecisionbetween several candidates in cases of ambiguity. The evaluation results reveal that,dependingonthetext,accuracyrangesfrom95.03%to99.36%,whilethe precision (average 98.93%) is always higher than the recall (average 94.94%).... relations is the part-whole relation. An important condition for estab- lishing this relationship in RuThes is that the concept-parts must be rigidly connected with their whole, Proceedings of CLIB 2018 96 that is, each example of the concept-part must, throughout its entire existence, require the existence ...
... resources. Adjectives in RuWordNet similarly to German or Polish wordnets (Gross and Miller, 1990; Maziarz et al., 2012; Kunze and Lemnitzer, 2010) are connected with hyponym-hypernym relations. Antonyms relations were transformed from association relations and currently are established between synsets, not ...
... Cambridge, MA: MIT Press. Gelfenbeyn, I., Goncharuk, A., Lehelt, V., Lipatov, A., and Shilo, V. (2003). Automatic translation of wordnet semantic network to russian language. In International Dialog 2003 Workshop, pages 148–154. Gruber, T. R. (1995). Toward principles for the design of ontologies used ...Cvetana Krstev, Ranka Stanković, Duško Vitas. "Knowledge and Rule-Based Diacritic Restoration in Serbian" in Proceedings of the Third International Conference Computational Linguistics in Bulgaria (CLIB 2018), May 27-29, 2018, Sofia, Bulgaria, Sofia : The Institute for Bulgarian Language Prof. Lyubomir Andreychin, Bulgarian Academy of Sciences (2018): 41-51
-
Ventex: an expert system for mine ventilation systems analysis
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 ...Nikola Lilić, Ranka Stanković, Ivan Obradović. "Ventex: an expert system for mine ventilation systems analysis" in Mining Technology, United Kingdom (1997)
-
Development of the hybrid MCDM model for evaluating and selecting bucket wheel excavators for the modernization process
This paper presents a methodology for evaluating and ranking different bucket wheel excavators (BWE) for determining which machine should enter in the process of revitalization and modernization. Various multicriteria methods are used. Combining them achieves the best effect when choosing BVE for the modernization process. AHP, TOPSIS, VIKOR, and PROMETHEE methods are used. The hybrid models are developed from the multi-criteria decision making (MCDM) methods and they are used to evaluate the basic indicators that characterize the operation of ...Snezana Savkovic, Predrag Jovancic, Stevan Djenadic, Milos Tanasijevic, Filip Miletic. "Development of the hybrid MCDM model for evaluating and selecting bucket wheel excavators for the modernization process" in Expert Systems with Applications, Elsevier BV (2022). https://doi.org/10.1016/j.eswa.2022.117199
-
Steel Arch Support Deformations Forecast Model Based on Grey–Stochastic Simulation and Autoregressive Process
Relatively large deformations of the steel arch support in underground coal mines in the Republic of Serbia present one of the main problems for achieving the planned production of coal. Monitoring of the critical sections of the steel arch support in the underground roadways is necessary to gather quality data for the development of a forecasting model. With a new generation of 3D laser scanners that can be used in potentially explosive environments (ATEX), deformation monitoring is facilitated, while ...čelična podgrada, prognoza deformacija, vremenske serije, grey-stohastička simulacija, autoregresija, podzemni rudnik ugljaLuka Crnogorac, Suzana Lutovac, Rade Tokalić, Miloš Gligorić, Zoran Gligorić. "Steel Arch Support Deformations Forecast Model Based on Grey–Stochastic Simulation and Autoregressive Process" in Applied Sciences, MDPI AG (2023). https://doi.org/10.3390/app13074559
-
Hibridni sistem za planiranje i analizu ventilacije rudnika
... planing and design process is the establishment of a basic or initial network and an appropriate database related to this network. Data for the basic network are obtained through data acquisition or by measuring the ventilation parameters. In order to be certain that the basic network represents the actual ...
... simpozijum, Beograd, No. 44, (1996). 59. LILIĆ N., STANKOVIĆ R., OBRADOVIĆ I., “Knowledge-Based System for Mine Ventilation Network Analysis“, 12th International Conference on Process Control and Simulation, ASRTP ‘96, Košice, pp 385- 392, (1996). 60. LILIĆ N., STANKOVIĆ R., OBRADOVIĆ I., “Ekspertni sistem ...
... conditions flow process modelling using CFD Data acquis ition ventilation and psychrometric parameters ventilation and psychrometric parameters Figure 3 Architecture of the hybrid system INVENTS The outlined system (Figure 3) permits an aerodynamic definition of mine ventilation network based on ...Nikola Lilić, Ranka Stanković, Ivan Obradović. Hibridni sistem za planiranje i analizu ventilacije rudnika, Rudarsko-geološki fakultet, Univerzitet u Beogradu, 2000
-
Using Lexical Resources for Irony and Sarcasm Classification
The paper presents a language dependent model for classification of statements into ironic and non-ironic. The model uses various language resources: morphological dictionaries, sentiment lexicon, lexicon of markers and a WordNet based ontology. This approach uses various features: antonymous pairs obtained using the reasoning rules over the Serbian WordNet ontology (R), antonymous pairs in which one member has positive sentiment polarity (PPR), polarity of positive sentiment words (PSP), ordered sequence of sentiment tags (OSA), Part-of-Speech tags of words (POS) ...... of the POS tagger so that we could experiment with different POS in the process of generating classifier features. Basic forms of words (lemmas) were used in all cases. The following features were used in the classification process: antonymous pairs (R), antonymous pairs where one member has positive ...
... September 20–23, 2017, Skopje Using Lexical Resources for Irony and Sarcasm Classification Figure 2: Verb synsets in the SWN ontology mutually connected with relations that participate in finding a broader set of synonyms and separated by the antonymy relation. from RDF triples (?a swn:irony ?z), ...
... g of ironic con- structs. There are not many direct antonyms in a natural language, therefore, their number is also small in the lexical-semantic network WordNet, compared to other relations. Also, indirect antonyms are often used in natural language, that is to say, synonyms of direct antonyms – e.g ...Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković. "Using Lexical Resources for Irony and Sarcasm Classification" in Proceedings of the 8th Balkan Conference in Informatics (BCI '17), New York, NY, USA, : ACM (2017). https://doi.org/
-
Multi-word Expressions for Abusive Speech Detection in Serbian
Ovaj rad predstavlja istraživanja na usavršavanju i unapređenju srpske verzije rečnika Hurtlex, višejezičnog leksikona uvredljivih reči. Posebnu pažnju posvećujemo dodavanju izraza sa više reči (polileksemskih jedinica) koji se mogu smatrati uvredljivim, jer su takvi leksički zapisi veoma važni za postizanje dobrih rezultata u mnoštvu zadataka otkrivanja uvredljivog jezika. Srpski morfološki rečnici se koriste kao osnova za čišćenje podataka i stvaranje rečnika. Istaknuta je veza sa drugim leksičkim i semantičkim resursima na srpskom jeziku i predviđena je izgradnja sistema za ...... man’, roba s greškom ‘dam- aged goods’; A ADV N (11), adjectives as simile figures, e.g. glup kao noć ‘stupid as night’, N CONJ N (9), two nouns connected with a conjunction, e.g. bruka i sramota ‘shame and disgrace’. It should be noted that since MWEs were not syntactically parsed, some expressions ...
... and Deutcher Akademischer Austauschdienst - DAAD, Project years 2020-2021, Cross-Lingual Hate Speech Detection, and COST Action CA18209 - European network for Web-centred lin- guistic data science. 83 References Valerio Basile, Cristina Bosco, Elisabetta Fersini, Debora Nozza, Viviana Patti, Francisco ...
... Klimek, pages 48–56. Ranka Stanković, Branislava Šandrih, Cvetana Krstev, Miloš Utvić, and Mihailo Škorić. 2020. Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian. In Proceedings of The 12th Language Resources and Evaluation Conference, pages 3947–3955 ...Ranka Stanković, Jelena Mitrović, Danka Jokić, Cvetana Krstev. "Multi-word Expressions for Abusive Speech Detection in Serbian" in Proceedings of the Joint Workshop on Multiword Expressions and Electronic Lexicons, Association for Computational Linguistics (2020)
-
LRMI markup of OER content within the BAEKTEL project
... stand-alone records rather than embedded in the HTML of web pages so that it may be used in resource discovery by search services that are connected to the Learning Registry. Other OER projects, similar to BAEKTEL also can benefit from LRMI metadata tagging. And at the end, users usually ...
... expectation of benefit and future implementation plans. 2. THE BAEKTEL OER FRAMEWORK The main goal of the BAEKTEL project is building an OER network for publishing educational materials by higher education (HE) institutions and best practice examples by enterprise experts. The resources can ...
... http://edx.baektel.eu/, which is build using edX, an open- source online learning platform. 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 ...Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić. "LRMI markup of OER content within the BAEKTEL project" in The Sixth International Conference on e-Learning (eLearning-2015), September 2015, Belgrade, Serbia, Belgrade : Belgrade Metropolitan Univesity (2015)
-
Serbian NER&Beyond: The Archaic and the Modern Intertwinned
U ovom radu predstavljamo srpski književni korpus koji se razvija pod okriljem COST Akcije „Distant Reading for European Literary History” CA16204. Koristeći ovaj korpus romana napisanih pre više od jednog veka, razvili smo i učinili javno dostupnim Sistem za prepoznavanje imenovanih entiteta (NER) obučen da prepozna 7 različitih tipova imenovanih entiteta, sa konvolucionom neuronskom mrežom (CNN), koja ima F1 rezultat od ≈91% na test skupu podataka. Ovaj model je dalje ocenjen na posebnom skupu podataka za evaluaciju. Završavamo poređenje ...... like “products”, “event”, “position”, etc. Dekker et al. (2019) experimented with diffe- rent off-the-shelf NER tools for the extraction of social network graphs from classic and mo- dern English fiction novels. The authors wan- ted to find out to what extent are these tools suitable for identifying fictional ...
... ti rakiju i kafu.”,12 ‘entities’: [(0, 10, ‘PERS’), (39, 44, ‘ROLE’), (86, 91, ‘ROLE’)] The spaCy v3.0 enables specification of cu- stom neural network architecture within a sim- ple text file. Using the quick-start widget,13 user can easily set up the default setting confi- guration. In our case ...
... NTCIR-15 Conference. Ranka Stanković, Branislava Šandrih, Cvetana Kr- stev, Miloš Utvić, and Mihailo Škorić. 2020. Machine Learning and Deep Neural Network- Based Lemmatization and Morphosyntactic Tag- ging for Serbian. In Proceedings of the 12th Lan- guage Resources and Evaluation Conference, pa- ges ...Branislava Šandrih Todorović, Cvetana Krstev, Ranka Stanković, Milica Ikonić Nešić. "Serbian NER&Beyond: The Archaic and the Modern Intertwinned" in Proceedings of the Conference Recent Advances in Natural Language Processing - Deep Learning for Natural Language Processing Methods and Applications, INCOMA Ltd. Shoumen, BULGARIA (2021). https://doi.org/10.26615/978-954-452-072-4_141
-
Environmental Risks to Air, Water and Soil Due to the Coal Mining Process
Ristović Ivica (2011)Ristović Ivica. "Environmental Risks to Air, Water and Soil Due to the Coal Mining Process" in Understanding and Managing Threats to the Environment in South Eastern Europe, NATO science for peace and security series 2, Ljubljana, Slovenia:SPRINGERLINK (2011): 251-264
-
Image analiyis of browning process in pesto spreads
Lato Pezo, Mirjana Pavlović, Sanja Ostojić, Snežana Zlatanović, Ilić Marija, Jasna Gvozdenović (2011)Lato Pezo, Mirjana Pavlović, Sanja Ostojić, Snežana Zlatanović, Ilić Marija, Jasna Gvozdenović. "Image analiyis of browning process in pesto spreads" in Međunarodni kongres o procenoj industriji ,Procesing 11, Fruška gora, 1-3 juna (2011): 36
-
Effect of pulp solid phase content alteration on “Lisina” phosphate flotation process
Radulović Dragan, Vučinić Dušica, Branislav Ivošević, Zorica Lopičić. "Effect of pulp solid phase content alteration on “Lisina” phosphate flotation process" in The 44th International October Conference on Mining and Metallurgy, Bor, Serbia: (2012): 129-132