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Упит dcterms_subject_txt:fuzzy analytic hierarchy process,expert knowledge

561 items

  • A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić (2023)
    This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...
    системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFIS

  • Building Terminological Resources in an e-Learning Environment

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... to management of RudOnto; the left hand side of the larger panel shows the hypernym/hyponym hierarchy of concepts, while the right hand side offers the full entry for the selected concept in the hierarchy. The entry consists of the basic term used for this concept, its synonyms (none in this case) ...
    ... authors, a terminological resource qualifies for an ontology only if new knowledge can be derived from segments of knowledge already existing in the resource. According to this view. an ontology is a formal representation of knowledge, which includes a vocabulary with a set of concepts, semantic rel ...
    ... the Web of knowledge – the Semantic Web, which can serve as an invaluable e- learning tool [4]. In the Semantic Web ontologies are integrated into repositories of learning objects, with the aim of organizing different concepts stored within these resources in what is known as “knowledge domain ontology” ...

  • Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm

    Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić (2021)
    Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...
    Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering
    ... in the SEA process, as shown in this paper for the aspect of noise. It is also necessary in order to minimize subjectivity in the process of expert evaluation, the application of which is characteristic of SEA. These facts have an additional impact on the quality of the SEA process in the planning ...
    ... ornithofauna and chiropterofauna. The weakness of SEA can be seen in its predominant application of expert qualitative methods that bring with them subjec- tivity, since they depend on expert knowledge and skills. This paper presents the aspect of noise impact assessment and its inclusion in the SEA ...
    ... in the process of multicriteria expert evaluation by including the results of a partial impact assessment of the noise from wind farms, using results obtained from software modeling of the spatial dispersion of wind turbine noise in the SoundPlan 8.1 software package in the SEA process. These ...

  • 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 ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... the SEDLA expert system for the selection of artificial lift methods. This contains three modules: a module of expert knowledge, experience and theoretical knowledge; a simulation design module; and an economic evaluation module. The expert knowledge module consists of an expert knowledge base, i.e ...
    ... defined linguistic variables (i.e., fuzzy sets) are: very low, low, moderate, high, and very high. The expert assessment consists of linguistic variables and the extent to which they apply to the observed well. Figure 2. Fuzzy sets. In dependence of μ, fuzzy number (FN) can be presented in form ...
    ... methods. The expert reviews all the parameters and decides which is the best method [6,8,10,15]. The second group (II) is expert systems: these are programs that analyze all parameters, both technical and economic, and in the output give the best artificial lift method. They use expert knowledge; it is ...

  • Availability as a dimension of energy security in the Republic of Serbia

    Boban Pavlović, Dejan Ivezić (2016)
    There is a range of modern approaches and models in literature for the evaluation and determination of energy security, which are based on different parameters and indicators. For most of them, a common characteristic is emphasizing the avail ability of energy, as an important dimension for ensuring energy security. In this paper, concise overview of Serbian energy sectors is given and appropriate energy indicators are defined and determined. Selected indicators provide insight into the main components that characterize availability ...
    raspoloživost energije, energetski indikatori, energetska bezbednost
    ... analysed using com- ponents proposed and described in [1]. However, instead of complex fuzzy approach, each component of availability is analysed by using selected set of indicators. Analytic hierarchy process (AHP) methodology is proposed and implemented for analysis of obtained indicators, their ...
    ... eu/eurostat/documents/ 3217494/7571929/KS-EN-16-001-EN-N.pdf/28165740-1051-49ea-83a3-a2a51c7ad304 [20] Saaty, T., Decision Making with the Analytic Hierarchy Process, International Journal of Services Scienc- es, 1 (2008), 1, pp. 83-98 [21] Ishizaka, A., Clusters and Pivots for Evaluating a Large Number ...
    ... and to provide some recommendations for the policy makers to develop efficacious measures for enhancing energy security. Therefore, analyt- ic hierarchy process methodology is applied to analyse collected data, to reveal cause – effect relationships, and to prioritize components of availability mutually ...

  • A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers

    Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić (2019)
    Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...
    Efikasnost, Fazi zaključivanje, Prikupljanje podataka, Buldozer

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... [2]. Analytic determination of availability function is possible but requires specific, quite complex IT system. Therefore, in this paper, an expert model, that integrates reliability, maintainability, and supportability in the measure of availability is proposed. This model is based on fuzzy sets ...
    ... Reliability, Maintainability, Supportability Expert Judgments Data classification Fuzzification Fuzzy inference engine Identification Input data set Input fuzzy set Output fuzzy set Linguistic value Fuzzy set proposition Situation analysis Fuzzy composition Probab.theory, Stat.processing ...
    ... Измењено: 2023-10-14 04:10:15 A Fuzzy Expert Model for Availability Evaluation Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] A Fuzzy Expert Model for Availability Evaluation | Dejan ...

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... cma.2011.03.016 ROZOS, D., BATHRELLOS, G.D. & SKILLODIMOU, H.D. (2010): Comparison of the implementation of rock engineering system and analytic hierarchy process methods, upon landslide susceptibility mapping, using GIS: a case study from the Eastern Achaia County of Peloponnesus, Greece.– Environmental ...
    ... 0023-0 ZHU, A-X., WANG, R., QIAO J., QIN, C-Z., CHEN, Y., LIU, J., DU, F., LIN, Y. & ZHU, T. (2014): An expert knowledge-based approach to landslide susceptibility mapping using GIS and fuzzy logic.– Geomorphology, 214, 128–138. doi: 10. 1016/j.geomorph.2014.02.003 ...
    ... Landslides, 7, 55–68. doi: 10.1007/s10346-009- 0188-x ERCANOGLU, M., KASMER, O. & TEMIZ, N. (2008): Adaptation and comparison of expert opinion to analytical hierarchy process for landslide susceptibility map- ping.– Bulletin of Engineering Geology and the Environment, 67/4, 565–578. doi: 10.1007/s10 ...

  • Keyword Extraction from Parallel Abstracts of Scientific Publications

    Slobodan Beliga, Olivera Kitanović, Ranka Stanković, Sanda Martinčić-Ipšić (2017)
    ... texts. On the left side is an example where the SBKE method returned a larger set of keywords where the broader concept “method” is added to “analytic hierarchy processes (AHP)”. On the right side of the table is an example where the word “speed” is listed as a keyword specified by a human, but in the ...
    ... A bilingual digital library for aca- demic and entrepreneurial knowledge management. In: Proceeding of 10th Inter- national Forum on Knowledge Asset Dynamics - IFKAD 2015: Culture, Innovation and Entrepreneurship: Connecting the Knowledge Dots, Bari, Italy, pp. 1764–1777 (2015) 16. Stanković, R., Krstev ...
    ... extraction methods in the text preprocessing step usually use some heuristics to gain in performance by using semantic or syntactic knowledge. As the source of syntactic knowledge, methods usually use part-of-speech tags (POS) in order to restrict access to certain types of words (e.g. nouns, verbs or adjectives) ...

  • Risk Evaluation: Brief Review and Innovation Model Based on Fuzzy Logic and MCDM

    Stevan Djenadic, Milos Tanasijevic, Predrag Jovancic, Dragan Ignjatovic, Dejan Petrovic, Ugljesa Bugaric (2022)
    The risk assessment of engineering systems represents an important part of the quality of service and dependability. The existing methods for risk evaluation use crisp sets for rating partial indicators’ proposition and their cumulative products as an overall indicator. In this paper, existing FMEA and FMECA methods have been improved using the fuzzy expert system for calculating the risk priority number. The application of fuzzy logic allows the use of linguistic descriptions for risk analysis. In this way, the ...
    rizik, inženjerski sistemi, fazi logika, višekriterijumske metode

  • Using technology for knowledge transfer between academia and enterprises

    Ivan Obradović, Ranka Stanković (2014)
    ... ways, the sources of these two types of knowledge and the knowledge acquisition process are in general separated, as higher education offering academic knowledge precedes the solving of practical problems within enterprises that generates expert knowledge. Although higher education institutions ...
    ... Institute of Knowledge Asset Management - ISBN 978-88-96687-04-8 Proceedings of IFKAD - ISSN 2280-787X Matera, Italy, 11-13 June 2014 www.knowledgeasset.org/IFKAD 793 materials and expert terminology ...
    ... learning resources in the form of video and lectures, printed course materials and the like, and enterprises to use similar forms to offer expert knowledge, such as case studies or presentations of software implementation in practice. The platform is being developed within a project funded by ...

  • Ventex: an expert system for mine ventilation systems analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    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 ...
    expert system, mine ventilation

  • Towards a Mining Equipment Ontology

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... the module for management of RudOnto within the SUKU information system. The hypernym/hyponym hierarchy tree is displayed at the left hand side of the larger panel. When a concept within this hierarchy is selected, a complete entry is displayed, as illustrated by the right hand side of the panel ...
    ... distinctive feature of ontologies, namely, that they allow derivation of new knowledge from the existing knowledge. To summarize, an ontology defines the terms and concepts used for describing a specific domain of knowledge, and are used by people and IT applications to share information from this domain ...
    ... M. C., Obrst, L. J., Smith, K.T.: The Semantic Web: A guide to the Future of XML, Web Services, and Knowledge Management. Indianapolis, Indiana: Wiley Publishing, Inc., Web Services, and Knowledge Management, John Wiley & Sons, 2000. [2] Dašić, P., Šerifi, V., Ječmenica R.: Metodologija izgradnje ...

  • Multi-Criteria Fuzzy-Stochastic Diffusion Model of Groundwater Control System Selection

    Dušan Polomčić, Zoran Gligorić, Dragoljub Bajić, Miloš Gligorić, Milanka Negovanović (2019)
    When considering data and parameters in hydrogeology, there are often questions of uncertainty, vagueness, and imprecision in terms of the quantity of spatial distribution. To overcome such problems, certain data may be subjectively expressed in the form of expert judgment, whereby a heuristic approach and the use of fuzzy logic are required. In this way, decision-making criteria relating to an optimal groundwater control system do not always have a numerical value. Groundwater control scenarios (alternatives) are identified through hydrodynamic ...
    expert judgment, linguistic variables, fuzzy dynamic TOPSIS, hydrogeology, groundwater control system, open-cast mine, geometric Brownian motion

  • Building learning capacity by blending different sources of knowledge

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić (2016)
    ... approach are the rapid changes of expert knowledge, especially in engineering disciplines. Starting with academic education of future experts and continuing with their life-long learning, the approach relies on blending academic and entrepreneurial knowledge by means of technology enhanced learning ...
    ... enterprises use similar forms to offer expert knowledge, such as case studies or presentations of industrial software implementation in practice. The abovementioned approach is being realized within the BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology Enhanced Learning) ...
    ... XML, Web services, and knowledge management. John Wiley and Sons Inc. Etzkowitz, H. (2004). The evolution of the entrepreneurial university. International Journal of Technology and Globalisation, 1 (1), 64-77. Gaul, W., & Schader, M. (Eds.). (2012). Data, expert knowledge and decisions: an i ...

  • Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović (2022)
    This work presents a model for determining the availability of continuous systems at open pits by applying fuzzy logic and fuzzy inference systems. The applied model was formed by the synthesis of independent partial indicators of availability. The model is based on an expert system for assessing the availability of continuous mining systems. The availability of the system, as a complex state parameter, is decomposed into the partial indicators, reliability, and convenience of maintenance, and the fuzzy compositions, used ...
    системи, континуални систем експоатације, површински коп, рударство, расположивост, фази логика, max–min композиција, min–max композиција

  • 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
    ... [5],[6]. MMT is a system that includes the theory graphs as the modular representation paradigm for mathematical knowledge. MathHub.info is an archive system for encoded knowledge and MathWebSearch is an example of a search engine enabling the search of mathematical formulae on the Web. The ...
    ... at registration. Editor and reviewer are users who have the task to update the contents of the dictionary, with the difference that in the hierarchy the reviewer is at a higher level. Reviewer is a user who has the exclusive right to initiate term verification (this is the advantage of reviewers ...
    ... International Journal of Corpus Linguistics. 17 (3), pp. 380–409. [16] Stanković, R., Obradović, I., Utvić, M., (2014). Developing Termbases for Expert Terminology under the TBX Standard. Natural Language Processing for Serbian - Resources and Applications, University of Belgrade, Faculty of ...

  • Развој геолошког терминолошког речника ГеолИССТерм

    Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić (2011)
    ... respectively. The terms in the hierarchy are linked via the is a relation which can be: • The hyponym of the same type as the hy- pernym • The hyponym is part of the hypernym • The hyponym is an instance of the hypernym Ontology A formal representation of knowledge which includes the vocabulary ...
    ... models featuring complex knowledge all the way through to theories of logic with rich, complex, consistent and mean- ingful knowledge. Based on all of the above, it could be said that an ontology defines the words and concepts used for describing a field of knowledge, thereby standardizing meanings ...
    ... applications sharing in- formation from the same domain. They code the knowledge from a single domain, as well as the knowledge that covers several domains. In this way, ontologies make it possible to reuse coded knowledge. An ontology consists of: – classes (or general templates of entities) ...

  • Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine

    Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić (2021)
    The production of lignite in large open-pit mines is mainly performed with continuously operating equipment, where bucket-wheel excavators, bucket-chain excavators, belt conveyors, and spreaders are the basic machines. Smaller machines, usually of discontinuous operating nature, are commonly categorized as auxiliary machines. This paper presents the research related to the analysis of auxiliary machine parameters with the case study for a hydraulic excavator. The purpose of the analysis was to develop a model of rating quality of service of the ...
    Fuzzy theory, hydraulic excavator, selection, quality of service, asset management

  • Terminological and lexical resources used to provide open multilingual educational resources

    Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić (2016)
    Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...
    otvoreni obrazovni resursi, leksički resursi, obrada prirodnih jezika, terminologija
    ... domain expert to arrive at a final list of validated terms [13]. Other problem that also arises is that such lists, based solely on human assessment, are often being questioned among experts and have the risk of being unsystematic and subjective [12], [14]. Automatic term extraction is a process that ...
    ... terminological resources are presented, followed by an overview of BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) resources, lexical resources, the process of terminology extraction and a presentation of TERMI, an application for terminology management. 2. TER ...
    ... of Mining and Geology, bojan.zlatic@rgf.bg.ac.rs Abstract: Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English ...