Претрага
637 items
-
Frequency and Length of Syllables in Serbian
Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová (2019)Basic analyses of several properties of syllables (the rank-frequency distribution, the distribution of length, and the relation between length and frequency) in Serbian is presented. The syllabification algorithm used combines the maximum onset principle and the sonority hierarchy. Results indicate that syllables behave similarly to words as far as mathematical models are concerned, but values of parameters in models for syllables are quite different from those for words.... the language under investigation contains any – can be reliably distinguished from sequences of two adjacent monophthongs). Consonant clusters (especially in intervocalic positions) are the most problematic aspect of syllabification. The problem can be solved either empirically, with the help of native ...
... particular consonant cluster is made. Finding or creating such a corpus can be problematic for minor languages (such as e.g. Lower and Upper Sorbian among Slavic languages). In addition, the rules derived from Pulgram’s approach can change relatively quickly, as lexicon is one of the more dynamic language ...
... the abovementioned hypothesis, the rank-frequency distribution of Serbian syllables (see Table 2, full data can be found at rgf.rs/projekti/bil/sk/results/KakoSeKalioCelik_2019 _01_14.xlsx) can be modelled by one of these distributions as well. Table 2. Rank-frequency distribution of syllables ...Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová. "Frequency and Length of Syllables in Serbian" in Glottometrics (2019)
-
Improvement of geodatabase queries within GeolISS
Ranka Stanković (2008)... only the Ranka Stanković 66 necessary data. Vector data can be displayed as vector graphics used on traditional maps, whereas raster data will appear as an image. Vector data are easier to register, scale, and re- project, which can simplify the combining of vector layers from different sources ...
... environment. They can be part of a relational table as a normal column and processes using a multitude of operators. The space required for storage and sharing of vector data is usually much smaller than the space required for raster data. Another advantage of vector data is that they can be easily updated ...
... Many query conditions can be combined with Boolean operators. As a support for novel users typical questions for selected search criteria are presented on the right side of the form. In the bottom part of the form is the WHERE condition for the SQL query, which the user can edit provided that he/she ...Ranka Stanković. "Improvement of geodatabase queries within GeolISS" in Review of the National Center for Digitization, Beograd : Faculty of Mathematics, Belgrade (2008)
-
Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation
kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje... deformation that can be described by F, can be written as a serial combination of a simple shear, simple extensions along the x or y axes and a rotation (Srinivasa 2012): F = QF̃. (11) Distortion F̃ contains all shape changes and Q is an orthogonal rotation matrix (QT Q = I). The distortion can very conveniently ...
... For example, shearing (simple shear) parallel to x can be achieved by engineering strain γ �= 0. Subsequently, extension or shortening along x can be achieved with stretch parameter a > 1 and 0 < a < 1, respectively. Similarly extension along y can be achieved using stretch parameter b �= 1. Finally ...
... deformation that can be described by F, can be written as a serial combination of a simple shear, simple extensions along the x or y axes and a rotation (Srinivasa 2012): F = QF. (1) Distortion F contains all shape changes and Q is an orthogonal rotation matrix (Q’Q = I). The distortion can very conveniently ...Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer. "Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation" in Geophysical Journal International, Oxford University Press (OUP) (2021). https://doi.org/10.1093/gji/ggab120
-
Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines
The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković. "Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines" in 8th International Conference MIining And Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
-
Fuzzy Model for Risk Assessment of Machinery Failures
The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...... consequences that can have an impact on machines, employees, or the working environment. Such incidents are called risky events. In general, it can be said that an event that can influence the outcome of a defined objective (preventing, disabling, or slowing down the realization of a goal) can be considered ...
... consequences that can have an impact on machines, employees, or the working environment. Such incidents are called risky events. In general, it can be said that an event that can influence the outcome of a defined objective (preventing, disabling, or slowing down the realization of a goal) can be considered ...
... sense) can lead to a first-rate risk assessment of an individual component’s failure. Meticulous attention should be directed toward the factors that can cause a risky event, as well as toward the consequences and negative effects that can manifest after a failure. The consequences of a failure can have ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy Model for Risk Assessment of Machinery Failures" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12040525
-
Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers
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... roughness of the grain, water content, and compaction, and can be expressed in the range of 20% < CBR, < 150% [6]. A CBR, test can be performed in the laboratory (CBR,) and in situ (CBR+p) (Fig. 1). Additional- ly, in-situ CBR, testing can be simulated in the laboratory by conducting the CBR test ...
... Bearing Ratio (CBR,) device that can be usedon 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 CBR, can be used to estimate the ...
... been in use worldwide for the last few years. As a device that can conduct tests in the laboratory and in the field, it allows the comparison of results obtained under different conditions, and the dependence between the parameters can be consid- ered to evaluate the suitability of materials and ...Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović. "Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers" in Soil Mechanics and Foundation Engineering, Springer Science and Business Media LLC (2024). https://doi.org/10.1007/s11204-024-09939-x
-
Determining seismic hazard in slowly deforming region: Can we gather enough information from karst caves?
Ana Mladenović, Jelena Ćalić (2021)Methods to determine seismic hazard in any region vary depending on the regional seismicity, but can be roughly grouped into two main groups: one based on probabilistic methods that use data about known seismicity in the region, and another, which is based on data related to the faulting processes and determination of seismically active faults. Both groups of methods are relatively good for seismically active regions. However, in regions of low seismic activity and slow deformations, there is neither ...Ana Mladenović, Jelena Ćalić. "Determining seismic hazard in slowly deforming region: Can we gather enough information from karst caves?" in EGU General Assembly 2021, European Geosciences Union (2021). https://doi.org/10.5194/egusphere-egu21-8723
-
Fuzzy expert analysis of the severity of mining machinery failure
Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy expert analysis of the severity of mining machinery failure" in Applied Soft Computing, Elsevier BV (2020). https://doi.org/10.1016/j.asoc.2020.106459
-
Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons
Mihailo Škorić (2017)The goal of this paper is to draw attention to the possibility of using emoticon-riddled text on the web in language-neutral sentiment analysis. It introduces several innovations in the existing framework of research and tests their effectiveness. It also presents a software tool especially made for that purpose, explains how it builds a database with sentimental value of terms and offers the user manual. Finally, it presents a software tool that tests the new database and gives some examples ...... and values can be set one by one, or this step can be skipped. In case this step is skipped, the software will automatically load the default determiners and their values (Table 1). All default determiners and their values listed in the advanced text min- ing catalog (Figure 5). The values can be changed ...
... in C# programming language and it can be ran on Windows platform, using any version of the operating system that runs to 64 bit. The interface is user-friendly and entirely in Serbian. The goal in designing this software was that any researcher who speaks Serbian can use it independently, create a new ...
... maximum number of determiners that can be used is 36. Infotheca Vol. 17, No. 1, 2017 75 Škorić M., “Classification Based on Emoticons”, pp. 67–91 Figure 3. A fragment of the input file. Figure 4. Fragment of the input file after preprocessing. Advanced users can modify text file data/emoticons ...Mihailo Škorić. "Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons" in Infotheca, Faculty of Philology, University of Belgrade (2017). https://doi.org/10.18485/infotheca.2017.17.1.4
-
Softverski alati za korišćenje resursa za srpski jezik
Ivan Obradović, Ranka Stanković (2008)... wordnet can be selected in much the same way as lemmas from dictionaries, using different criteria and methods, from simple stating of words, or more precisely strings corresponding to words, to complex Xpath expressions, which can be predefined or specified by the user. The Xpath expression can be ...
... developed, which are of special interest since, in principle, they can be used independently, as separate components. In this paper we will demonstrate how lexical resources for Serbian, developed within the Hu- man Language Technology Group, can be further developed and used with the help of the WS4LR ...
... another synset related to it, so a situation can occur where a relation is established with a synset which does not exist any more, or does not exist yet. Besides, the same literal should not appear in two nodes related by a hypernym/ hyponym relation, which can also be verified by this module. Figure ...Ivan Obradović, Ranka Stanković. "Softverski alati za korišćenje resursa za srpski jezik" in INFOteka: časopis za informatiku i bibliotekarstvo, Belgrade, Serbia : Zajednica biblioteka univerziteta u Srbiji (2008)
-
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 ...... In dependence of μ, fuzzy number (FN) can be presented in form (1): FN = (μ j = 1, … μ j = 10) (1) Linguistic variables (H) can be presented in the same form. For example, if H = Very low, μ = 1 for j = 1, 2; μ = 0 for j = 3, ..., 10. Other fuzzy sets can be written as: low = (0/1, 0/2, 1/3, ...
... In dependence of µ, fuzzy number (FN) can be presented in form (1): FN = (µ j = 1, . . . µ j = 10) (1) Linguistic variables (H) can be presented in the same form. For example, if H = Very low, µ = 1 for j = 1, 2; µ = 0 for j = 3, ..., 10. Other fuzzy sets can be written as: low = (0/1, 0/2, 1/3, ...
... selecting an ideal method for exploitation is complex and subjective. Different researchers can choose different methods using the same facts and information. There is, however, a process of thinking that everyone can follow to eliminate some subjectivity. Mehrdad Alemi, with a group of authors [11–14] ...Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković. "Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic" in Energies, MDPI AG (2020)
-
An Integrated Environment for Management and Exploitation of Linguistic Resources
Ranka Stanković, Ivan Obradović (2009)... been developed. These services are of special interest as they can also be used independently, as separate components. This paper outlines how linguistic resources for Serbian, developed within the HLT Group, can be further enhanced and used with the help of the WS4LR software tool and ...
... different criteria. Fig. 1 depicts a form for management of dictionaries of simple words. Within this form, lemmas can be changed, deleted and copied, and new information can be added. It is also easy to obtain a contextual menu for a lemma, with other possibilities offered (the smaller window ...
... corresponding hypernym/hyponym tree Synsets from a wordnet can be selected in much the same way as lemmas from dictionaries, using different criteria and methods, from simple entry of one or more words, to complex Xpath expressions, which can be predefined or specified by the user. The use ...Ranka Stanković, Ivan Obradović. "An Integrated Environment for Management and Exploitation of Linguistic Resources" in Proceedings of the International Multiconference on Computer Science and Information Technology, Computational Linguistics – Applications Workshop (CLA09), Mrągowo, Poland, October 2009, Piscataway : IEEE (2009)
-
The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje
In order to determine the solar energy potential for a specified location, it is crucial to consider the latitude, altitude, slope, terrain morphology, atmospheric conditions, etc. Such a complex calculation and mapping of solar energy can be done using the ArcGIS geoprocessing tool, named Area Solar Radiation (ASR). By using the ASR tool, supported with the adequate input data, it is possible to calculate the maximum solar radiation energy (irradiation) for a defined area and for a specified time ...... for a total urban area is 1,227 kWh/m?, annually. The obtained result can be used as an input for further technical and economic analysis of the cost-effectiveness of the usage of solar energy. The presented methodology can be applied to any other area with an appropriate digital elevation model ...
... Rich P.M., 2000). Figure 3 shows the layout of the hemispherical viewshed. As it can be seen, such alayout also provides a view of the surrounding topography, where it is possible to observe how topography can prevent direct solar radiation. The resultant viewshed characterizes whether the ...
... DEM can be represented as a raster. Raster data is made up of pixels (or cells), and each pixel has an associated value. In case of the DEM, each cell has a value corresponding to its elevation (PBC GIS, 2019). For the generation of the DEM generally data issued from different sources can be ...Boban Pavlović, Milica Pešić-Georgiadis. "The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje" in 12th International Conference on Energy and Climate Change, 9-11 October 2019, Athens - Greece, Energy Policy and Development Centre (KEPA) of the National and Kapodistrian University of Athens (2019)
-
Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit
... then it can be seen that their relations. at various levels have approximately the same value which will be marked —n meaning that: Av _ ~_n: Ap 5 (4) R Thereby, it can be considered that: Av Av lim „ _, Š =-n _ Which means that is: & =-n 6) R R . . Av AR . NEAR . Equation (5) can be written ...
... and even hundreds of tonnes of an explosive are being apllied in the world nowdays. Such large quantities of an explosive can cause seismic shocks with the intensity that can have hazardous impact on the environment and result in moving of buildings. In order to protect the environment from shock ...
... conditions of blasting. 5. DEFINING STATISTICAL CRITERIA For the above-mentioned models 1 — 5, on the basis of experimental data, we can get equations that can give us the rock mass oscillation velocities V depending on the reduced distance R. In order to evaluate the degree of connection between ...Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac. "Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia, Belgrade : University of Belgrade-Faculty of mining and geology (2023)
-
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
-
Coal homogenization stockyard sizing “Tamnava – Zapad” case study
... for evaluating the performances of the modelled stockyard can be conducted in several manners. Zhao et all (2015) modelled a stockpile as a grid of voxels (octants), associated with machine operations.Their 3D quality embedded model can be used to calculate, plan, control and predict the quality ...
... 5000 t and the permitted speed range of the stacker (4-20 m/min) coal can be stacked in 16 to 90 layers. For a more realistic hourly capacity, the minimum and maximum number of layers changes. For a pit rate of 3000 t/h, coal can be stacked in 25 to 150 layers. The example in Figure 2 shows the ...
... When the anticipated quality range of the observed parameter is small, the stockpiling conditions (number of layers, size or length of the pile) can be considered to be fixed. When this anticipated range is large all stockyard parameters are variable, practically on a daily basis, especially the ...Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer. "Coal homogenization stockyard sizing “Tamnava – Zapad” case study" in Proceedings of 13th International Symposium Continuous Surface Mining, ISCSM 2016, / (2016)
-
Mine ventilation system planning using genetic algorithms
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 methodsNikola Lilić, Ranka Stanković, Ivan Obradović. "Mine ventilation system planning using genetic algorithms" in 6. international symposium on mine planning and equipment selection, Ostrava (Czech Republic), 3-6 Sep 1997, A.A. Balkema, Rotterdam (Netherlands) (1997)
-
OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian
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. ...Ranka Stanković, Maxim Ionov, Medina Bajtarević, Lorena Ninčević. "OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian" in Proceedings of the 9th Workshop on Linked Data in Linguistics @ LREC-COLING 2024, Turin, 20-25 May 2024, ELRA and ICCL (2024)
-
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) ...... cient showed that agreements whose values are α ≥ 0.667 can be considered reliable, and the agreements whose values are α ≥ 0.8 can be considered very reliable. Inter-annotator agreement between two annotators working on annotation of ironic tweets can be con- sidered reliable in our case, as the value we ...
... that purpose, online resources, such as Twitter, are used very frequently, where the hashtag #irony can be used to extract a tweet sub-collection which will be marked as ironic, while the non-ironic part can be formed out of tweets that contain other hashtags, such as #educa- tion, #politics, #health, etc ...
... some context) a synonym of an adjective beautiful. 7Value of the Kalpha coefficient can be in the interval [0, 1] where Kalpha = 1 represents complete agreement, and Kalpha = 0 represents complete disagreement. Kalpha can also have a negative value from the [−1, 0) interval caused by sampling mistakes or ...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/
-
A WebGIS Decision Support System for Management of Abandoned Mines
Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)... nearest town, approved area or local recipient water can optionally be entered manually. Field values for type of mineral resource are domain controlled, so the user can only select from the list of pre-defined values. The same is true for status, which can be: active, abandoned, unknown, temporary suspension ...
... about these facilities. Thus the current state of these facilities can be compared with existing data, followed by an expert assessment of the current situation. For the other subgroup only the expert assessment of the current situation can be carried out, as a basis for further action. Analysis and solutions ...
... contained in the mine water. Geothermal energy systems using heat pumps to extract this heat can be used to offer local employment and energy resilience to the surrounding communities [1]. Abandoned mine methane (AMM) can also be recovered from closed coal mines and used for producing thermal and electrical ...Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis. "A WebGIS Decision Support System for Management of Abandoned Mines" in Energies 7 no. 9 (2016): 567. https://doi.org/10.3390/en9070567