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1778 items
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Towards Automatic Definition Extraction for Serbian
U radu su prikazani preliminarni rezultati automatske ekstrakcije kandidata za definicije rečnika iz nestrukturiranih tekstova na srpskom jeziku u cilju ubrzanja razvoja rečnika. Definicije u rečniku Srpske akademije nauka i umetnosti (SANU) korišćene su za modelovanje različitih tipova definicija (opisnih, gramatičkih, referentnih i sinonimskih) koje imaju različite sintaksičke i leksičke karakteristike. Korpus istraživanja sastoji se od 61.213 definicija imenica, koje su analizirane korišćenjem morfoloških e-rečnika i lokalnih gramatika implementiranih kao pretvarači konačnih stanja u paketu za obradu korpusa otvorenog ...... recognized in the textbook corpus are in some cases similar to the definitions in the SASA dictionary, e.g. definitions for the orchid family (example 1 in Table 3), while in other cases they differ, stressing a different attribute, e.g. definitions of alcoholic (example 2 in Table 3). In some cases ...
... es. Definition extraction is a relevant task in different areas. In addition to dictionary writing, it is also important in the domain of question answering, namely responding to ‘What-is’ questions, as well as for ontology development. The context in which we will apply definition extraction is ...
... the default choice, or whether it can be anywhere in the sentence. Spala and colleagues (2019) associate a detailed annotation scheme with the corpus in order to explore diverse structures of term definitions in free and semi-structured texts. In addition to the basic concept (Term) and its main ...Ranka Stanković, Cvetana Krstev, Rada Stijović, Mirjana Gočanin, Mihailo Škorić. "Towards Automatic Definition Extraction for Serbian" in Proceedings of the XIX EURALEX Congress of the European Assocition for Lexicography: Lexicography for Inclusion (Volume 2). 7-9 September (virtual), Democritus University of Thrace (2021)
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Long-term planning methodology for improving wood biomass utilization
The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković. "Long-term planning methodology for improving wood biomass utilization" in Energy, Elsevier BV (2019). https://doi.org/10.1016/j.energy.2019.03.105
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The Nooj System as Module within an Integrated Language Processing Environment
... the techniques in which a query, serving as input to a document retriever, is transformed in some way in order to improve the performance of document retrieval. Namely, a search by a concept instead of a search by a single word form is recognized as a very important new direction in information ...
... that would locate all literals from a chosen synset in a text, with or without synset hypernyms. User can than use the generated graphs in Intex environment to perform the actual retrieval, or import them in NooJ and convert to syntactic grammars in order to perform the same task. Figure 5 ...
... accompanying the synset literal in a wordnet is the PoS, and it has to be the same for all literals in one synset. Enriching the synsets with information from the morphological dictionary makes the usage of a wordnet in an information retrieval task more efficient. In a number of cases this additional ...Ranka Stanković, Duško Vitas, Cvetana Krstev. "The Nooj System as Module within an Integrated Language Processing Environment" in Proceedings of the 2007 International Nooj Conference, Cambridge Scholars Publishing (2008)
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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 ...... data mining methods for retrieval of metadata – in shape of determiners, that users of social networks inadvertently use in their messages (in the form of emoti- cons or language-universal phrases) and assigning values of sentiment polar- ity to terms in which those determiners are located. As the determiners ...
... human. At University of Tokyo in 2009 a study was published, in which the nine moods were analysed in text using complex finite automata that recognizes the grammatical structure of the text (Neviarouskaya et. al., 2009). That same year, researchers at Stanford University in California unveiled the new ...
... University in Jerusalem in 2010 carried out another similar research of sentiment expressed in Twitter posts, taking into account 15 emoticons, and 50 tags,1 as addition, which is their original cotri- bution (Davidov et. al., 2010). The algorithms that were trained using tags, also succeeded in recognizing ...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
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Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes
... was in fifth place in 2012 and 2013 and in third place in 2014. Spatial distribution of emissions of pollutants is determined according to the level of emissions, in metric tons per annum. Emission values are classified into six levels. Based on the graphic display, it can be concluded that, in the proximity ...
... organizing data in the field of the environment of Canada, and it eventually began to be used in the practice of OECD, in the working group for the state of the environment [10]. The PSR model is a concept by which anthropogenic activities generate environmental pressures that result in changes in the state ...
... development are reflected in the rational exploitation of natural resources, preservation of the soil humus layer, and rehabilitation of degraded soils [14]. In order to reduce emissions of particulate matter, electrostatic filters in block B1 in TPP “Kostolac B” were reconstructed. In the thermal power plant ...Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović . "Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes" in Energies (2016). https://doi.org/https://doi.org/10.3390/en9121071
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INVENTS: A Hybrid Mine Ventilation Planning and Design System
Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...... require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we present the design methodology of the ...
... air flow and pressure distribution in the ventilation network, 2. a block for the analysis of climate conditions in mine chambers, 3. a block for temperature and heat depression analysis in fire incidence conditions, 4. a block for gas distribution analysis in the ventilation network. All blocks ...
... adopted graphic notation. In view of the fact that SimVent was developed in Visual Studio 6.0 programming environment, the package was presented through UML notation in the form of three-level class diagrams architecture. This architecture supports the object-oriented approach in model development for ...Lilić Nikola, Stanković Ranka, Obradović Ivan. "INVENTS: A Hybrid Mine Ventilation Planning and Design System" in Proceedings of International Scientific Conference of FME Session 4: Automation Control and Applied Informatics , Hong Kong : iConcept Press (2013)
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INVENTS: a hybrid system for subsurface ventilation analysis
Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...... require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we present the design methodology of the ...
... air flow and pressure distribution in the ventilation network, 2. a block for the analysis of climate conditions in mine chambers, 3. a block for temperature and heat depression analysis in fire incidence conditions, 4. a block for gas distribution analysis in the ventilation network. All blocks ...
... adopted graphic notation. In view of the fact that SimVent was developed in Visual Studio 6.0 programming environment, the package was presented through UML notation in the form of three-level class diagrams architecture. This architecture supports the object-oriented approach in model development for ...Nikola Lilić, Ranka Stanković, Ivan Obradović. "INVENTS: a hybrid system for subsurface ventilation analysis" in Proc. of International Scientific Conference of FME, September 2000, Ostrava, FME (2000)
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Towards Semantic Interoperability: Parallel Corpora as Linked Data Incorporating Named Entity Linking
U radu se prikazuju rezultati istraživanja vezanih za pripremu paralelnih korpusa, fokusirajući se na transformaciju u RDF grafove koristeći NLP Interchange Format (NIF) za lingvističku anotaciju. Pružamo pregled paralelnog korpusa koji je korišćen u ovom studijskom slučaju, kao i proces označavanja delova govora, lematizacije i prepoznavanja imenovanih entiteta (NER). Zatim opisujemo povezivanje imenovanih entiteta (NEL), konverziju podataka u RDF, i uključivanje NIF anotacija. Proizvedene NIF datoteke su evaluirane kroz istraživanje triplestore-a korišćenjem SPARQL upita. Na kraju, razmatra se povezivanje Linked ...paralelni korpusi, povezivanje imenovanih entiteta, prepoznavanje imenovanih entiteta, NER, NEL, povezani podaci, NIF, VikipodaciRanka Stanković, Milica Ikonić Nešić, Olja Perisic, Mihailo Škorić, Olivera Kitanović. "Towards Semantic Interoperability: Parallel Corpora as Linked Data Incorporating Named Entity Linking" in Proceedings of the 9th Workshop on Linked Data in Linguistics @ LREC-COLING 2024, Turin, 20-25 May 2024, ELRA and ICCL (2024)
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Testing the energy value of different types of coal by the method of active thermography
In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Testing the energy value of different types of coal by the method of active thermography" in 9th International Scientific Conference on Defensive Technologies, Belgrade, Serbia, 15-16 October 2020, The Military Technical Institute (2020)
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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 ...... named SrpCNNER, presented in Section 4. Having the gold dataset, prepared as described in Subsection 4.1, we trained (Subsection 4.2) and evaluated the model in two different set- tings: first, we discussed our model’s perfor- mance on the SrpELTeC-gold test subset, as shown in Subsection 4.3. Afterwards ...
... not present in the gold standard, named SrpELTeC-eval, with the findings and a thorough discussion given in Section 5. Finally, conclusions and plans for the future work were stated in Section 6. 2 Related Work The existence of large-scale lexical resources for Serbian, e-dictionaries in particular ...
... SrpNER system for Serbian introduced in Section 2 was used in the first stage of the gold standard preparation (dubbed SrpELTeC- gold) in order to automatically annotate Sr- pELTeC collection. The tagset used by Srp- NER differed from the simplified tagset used in the ELTeC project – the tags are more ...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
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The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia
... tissues. In all samples long-chain n-alkanes (C26–C33) are the most abundant, exhibiting notable odd- over even predominance. The elevated contents of mid- chain, C23 and C25 n-alkanes, resulting in higher Paq index, are observed in Lower Miocene samples. The most abundant diterpenoid in aliphatic ...
... is associated with higher content of fernenes in Middle Miocene samples, which are absent in most of the Lower Miocene lignites. Although non-hopanoid triterpenoids played a subordinate role in the aliphatic fractions, they prevail in aromatic fractions of lignites. The result is consistent ...
... of mineral matter. Total sulphur content ranges from 0.67 to 0.80% and from 0.90 to 1.24 % in Lower and Middle Miocene samples, respectively, implying peatification in the freshwater environment. In aliphatic fractions of all samples, n-alkanes prevail, followed by hopanoids and diterpenoids ...I. Kojic, J. Kus, D. Zivotic, K. Stojanovic. "The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia" in 30th International Meeting on Organic Geochemistry (IMOG 2021), European Association of Geoscientists & Engineers (2021). https://doi.org/10.3997/2214-4609.202134092
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New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)
Nevenka Đerić, Nataša Gerzina (2014)... MORIN, 1984; URQUHART, 1994), while the radiolarian assemblage in sample BR 1/3 contains Pseudoaulophacus lenticulatus (White) (LAD in the Campanian; PESSAGNO, 1976; URQUHART, 1994). In summary, the samples are certainly Santonian in age, but a more precise dating is difficult to establish with ...
... taxonomically diverse in comparison with thc radiolarian assemblages in Struganik. Morecover, the radiolarian asso- ciation in Brežđe is characterized by an absolute predomina- tion of the species Dictyomitra koslovae and Dictyomitra Jormosa, which are also present also in the Struganik asso- ...
... 2014). The data presented in this paper will enable comparison with similar rocks in the wider surroundings, which should be an important contribu- tion to better understanding of geology of Western Serbia. 2. GEOLOGICAL SETTING The studied locality is situated in Western Serbia, 17 km southeast ...Nevenka Đerić, Nataša Gerzina. "New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)" in Geologia Croatica (2014)
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SASA Dictionary as the Gold Standard for Good Dictionary Examples for Serbian
Ranka Stanković, Branislava Šandrih, Rada Stijović, Cvetana Krstev, Duško Vitas, Aleksandra Marković (2019)У овом раду представљамо модел за избор добрих примера за речник српског језика и развој иницијалних компоненти модела. Метода која се користи заснива се на детаљној анализи различитих лексичких и синтактичких карактеристика у корпусу састављених од примера из пет дигитализованих свезака речника САНУ. Почетни скуп функција био је инспирисан сличним приступом и за друге језике. Дистрибуција карактеристика примера из овог корпуса упоређује се са карактеристиком дистрибуције узорака реченица ексцерпираних из корпуса који садрже различите текстове. Анализа је показала да ...Српски, добри примери из речника, аутоматизација израде речника, издвајање својстава, Машинско учење... The histogram of the number of words in examples. 260 Proceedings of eLex 2019 The histograms on the left show that sentences in the last three volumes tend to be slightly longer than in the first two, and that nouns (green) are the most numerous words. In volume D18 the number of verbs (blue) ...
... published in 1959 (the project itself has been underway since the last decades of the 19th century), and the last, 20th volume was published in 2017 (the total number of volumes planned is 35). This is a long-term, time-consuming project. Although the process of dictionary-making continues in the t ...
... Digitization of the published volumes began in 2016, and the first exploitation of two digitized volumes was reported in Stijović and Stanković (2017). Dictionary entries from five volumes were automatically parsed and stored as a structured text in a lexical database, which offers the opportunity ...Ranka Stanković, Branislava Šandrih, Rada Stijović, Cvetana Krstev, Duško Vitas, Aleksandra Marković. "SASA Dictionary as the Gold Standard for Good Dictionary Examples for Serbian" in Electronic lexicography in the 21st century. Proceedings of the eLex 2019 conference , Lexical Computing CZ, s.r.o. (2019)
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Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae
Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović. "Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae" in Organic Geochemistry, Elsevier BV (2019). https://doi.org/10.1016/j.orggeochem.2019.01.001
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Determining seismic hazard in slowly deforming region: Can we gather enough information from karst caves?
Ана Младеновић, Јелена Ћалић (2021)... Carpatho-Balkanorogen, situated in Eastern Serbia. This orogen represents the western part of the Carpatho-Balkan orogenic chain, extending in the north to the Romanian Southern Carpathians and in itssoutheastern part to the Balkan massif in Bulgaria. In its central part, in Eastern Serbia, Carpatho-Balkanides ...
... Moesianindenter and the tectonic units in-between. Such stress field is shown to be highly heterogeneouseven in this relatively small research area, so local areas of transtension and transpression havealso been very important in controlling the recent fault kinematics in this part of the Carpatho-Balkanides ...
... that have been formed in EarlyCretaceous and were multiply activated during their geological history. This activity led to theformation of faults that are favorably oriented in respect to the main thrust system. It is suspectedthat some of these fault systems are also active in recent times. Relatively ...Ана Младеновић, Јелена Ћалић. "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
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Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete
Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija... carried out in order to find the potential useful value of such waste. Accordingly, in order to solve environmental problems related to hazardous waste slag from lignite combustion, the potential use of waste slag generated in the heating plant in Valjevo, Serbia, as a replacement for cement in the production ...
... 24 h in a mold in a water bath, after which they are removed from the mold and cured in water for the next 48 h. Baseline reading was conducted 72 h after making the prisms, and then the readings were performed after 4, 7, 14, 21 and 28 days. The difference in reading represented a variation in the length ...
... of the calcite (CaCO3) in the designed mortar [36]. 4. Conclusions The results presented in this study show that waste slag generated in a heating plant by the combustion of lignite and taken from the Valjevo landfill in Serbia, may, despite being hazardous waste, be used in combination with silica ...Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović . "Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete" in Minerals, MDPI (2021). https://doi.org/10.3390/min11090925
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Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)
Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...... to erosion and weathering processes. In this study, the research objective was to provide more in- sights about the evolution of this relatively small-scale area (Fig. 1). Starting from the distribution of Miocene sediments in the field, their exposure in the relief and an interesting relationship ...
... Such characteristics are reflected in the local structural units in the eastern section of the studied area, i.e., the Ripanj, Ralja and Sopot bays; see Fig. 17 (MAROVIĆ & KNEŽEVIĆ, 1985). In that sense, our findings of new Sarmatian sections and outcrops in the area of the Ra- kovica stream valley ...
... and EREMIJA (1977b), it is an asymmetric trough in which Neogene deposits are slightly folded in a shallow syncline. Along Mt. Avala itself, the sediments of the lower Pontian discordantly overlie the Meso- zoic palaeorelief (Fig. 20). In contrast, in the northern part, at the base of Torlak Hill ...Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić. "Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)" in Geologia Croatica (2019). https://doi.org/10.4154/gc.2019.11
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Развој геолошког терминолошког речника ГеолИССТерм
... existing in it. In information science, tax- onomies are products of engineering rather than just an abstract result of human thought. The understanding of taxonomies in information sci- ence is therefore different and they are viewed as classifications of entities in the form of hier- archies in accordance ...
... featured in geolISSTerm. 6. Conclusion The development and use of the standardized terminology in digital databases is in many re- spects a novel field that is bound to evolve over time, as more experience is gained in that area. The significant steps and progress that have been made in Serbia in ...
... are above taxonomies in the se- mantic spectrum. They can be defined as vocab- ularies structured in such a way so as to display equivalence, homography, hierarchy and associa- tion relations among terms in a clear manner and allow their easy recognition through standard in- dicators. The primary ...Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić. "Развој геолошког терминолошког речника ГеолИССТерм" in INFOteka: časopis za informatiku i bibliotekarstvo, Beograd : Zajednica biblioteka univerziteta u Srbiji (2011)
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Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine
Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...... be shown in the case study (on the example) of bulldozers working in the open-pit lignite mine. Keywords: availability; fuzzy theory; AHP multi-criteria analysis; expert judgment; bulldozer 1. Introduction Various explanations of the term availability are to be found in the literature. In essence ...
... be shown in the case study (on the example) of bulldozers working in the open-pit lignite mine. Keywords: availability; fuzzy theory; AHP multi-criteria analysis; expert judgment; bulldozer 1. Introduction Various explanations of the term availability are to be found in the literature. In essence, ...
... picture, in which times of operation alternate with times of failure. The time state picture, i.e., the time and maintenance time structure for analyzing the availability of technical systems is shown in Figure 1, where, in general, t1 is uptime, and t2 is downtime. The time when the system is in its proper ...Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović. "Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine" in Energies, MDPI AG (2019). https://doi.org/10.3390/en12214044
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Effectiveness Analysis of Different Bucket-wheel Excavators
Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić. "Effectiveness Analysis of Different Bucket-wheel Excavators" in 8th International Conference Mining and Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)