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Упит dcterms_subject_txt:quality of service

2613 items

  • 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

  • Application of the Fuzzy theory in the evaluation of operating parameters of auxiliary mechanization on open-cast coal mine, case study: pipelayers

    Stevan Djenadić, Miloš Tanasijević, Filip Miletić, Predrag Jovančić (2022)
    Achieved operating parameters are the main indicator of the work quality and selection of mining machines. The effectiveness of a coal mine is correlated with the availability of basic and auxiliary machines. The main task of auxiliary machines in lignite mines is to achieve optimal working conditions. From an economic point of view, auxiliary machines generate up to 20% of the lignite mines' total costs. These are the primary reasons for analyzing their current work and making decisions in ...
    upotrebni kvalitet, fazi teorija, rudarske mašine

  • Analiza osnovnih indikatora upotrebnog kvaliteta mašina pomoćne mehanizacije na površinskim kopovima uglja

    Stevan Đenadić, Dragan Ignjatović, Predrag Jovančić, Milena Lekić, Žarko Aleksić, Ivan Janković (2022)
    Izbor optimalnog tipa mašine i adekvatno upravljanje kroz životni vek je kompleksan zadatak. Osnovna pitanja koje se postavljaju prilikom rešavanja ovog zadatka vezana su za stepen zadovoljenja rada mašine i optimalan trenutak zamene iste. U ovom radu je izvršena analiza rada dozera koji su u radu na površinskom kopu lignita RB Kolubara. Analizom je obuhvaćeno 4 različita proizvođača dozera a to su: Caterpillar, Dressta i Shantui i Liebherr. Analiza je izvršena sa aspekta ukupnih troškova koji se stvaraju i ...
    rudarstvo, mehanizacija, upotrebni kvalitet, troškovi, empirijska raspoloživost

  • Defining of model for determining the service life of hoisting ropes in mining

    Trifunović Prvoslav, Miličić Nada (2013)

  • Vebran Web Services for Corpus Query Expansion

    Ranka Stanković, Miloš Utvić (2020)
    U ovom radu se govori o razvoju veb usluga Vebran i njihovoj primeni u poboljšanju pretraživanja korpusa. Veb-servisi Vebran koriste se za konsultovanje spoljnih leksičkih izvora za srpski jezik (uglavnom elektronski morfološki rečnici i srpski Vordnet) i proširivanje korisničkih upita radi dobijanja relevantnijih rezultata iz srpskih korpusa.
    corpus search, web service, Serbian lexical resources, query expansion
    ... database) is developed offering various possibilities for improvement of SMD, e.g. control of data consistency and introduction of explicit relations between lexical entries, automatic generation of dictionary candidates. The new version of service Vebran (cf. 4) is using this database for morphological expansion ...
    ... search, web service, Serbian lexical resources, query expansion. PAPER SUBMITTED: 18 October 2019 PAPER ACCEPTED: 13 December 2019 Ranka Stanković ranka.stankovic@rgf.bg.ac.rs University of Belgrade Faculty of Mining and Geology Miloš Utvić milos.utvic@fil.bg.ac.rs University of Belgrade Faculty ...
    ... including extraction of terms and other tasks in the field of knowledge engineering (Утвић et al., 2018). The RudKor contains 344 different texts with a total size of 5.4 million words. Infotheca Vol. 19, No. 2, December 2019 101 Stanković R. and Utvić M., “Vebran Web Service . . . ”, pp. 99–118 ...

  • Geological knowledge in service to archaeological investigations: rock and ceramic findings as examples

    Kristina Šarić, Suzana Erić, Vladica Cvetković, Josip Šarić, Dragana Antonović, Vesna Bikić (2022)

  • Srbija u OneGeology Europe

    Danka Blagojević, Ranka Stanković, Petar Stejić, Velizar Nikolić (2014)
    Геолошки завод Србије као носилац Пројекта ОneGeologyEurope заједно са Рударско геолошким факултетом и Министарством за природне ресурсе, рударство и просторно планирање су се укључили у међународни Пројекат OneGeology Europe у мају 2013. године у већ поодмаклој фази израде Пројекта. До краја 2013. године испунили су завршене активности које треба да доведу до пуноправног укључења у Пројекат чиме је Република Србија нашла своје место на Геолошкој карти Европе 1:1М. Геолошка карта Србије 1:1М представља компилациону односно поједностављену верзију ОГК 1:500 ...
    OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем
    ... where upon 1:1M map of Serbian geology will be integrated in 1G-E Portal: - Validation and integration of the results of the 1G-E Portal. - Incorporate metadata 1G-E Portal. - Validation of the map service. - Their integration on 1G-E Portal. Conclusion Realization of Basic geological map ...
    ... activities where upon 1:1M map of Serbian geology will be integrated in 1G-E Portal: - Validation and integration of the results of the 1G-E Portal. - Incorporate metadata 1G-E Portal. - Validation of the map service. - Their integration on 1G-E Portal. Conclusion Realization of Basic geological map, which ...
    ... metadata catalog of 1G-E portal. WMS web service is available for use in GIS client (as ArcMap): http://gzs.rgf.rs:6080/arcgis/services/ RGF_GZS_Bedrock_and_Superficial_Geology/MapServer/WMSServer and it contains a layer of geological units and a layer of geological structures. Service name, as well ...

  • Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry

    Steven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti (2021)
    Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...
    self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalization

  • WebGIS Cadastre of Abandoned Mines in Autonomous Province of Vojvodina

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2015)
    ... Special attention was given to securing a high level and quality of project work, both regarding the quality of content, namely data and information, but also regarding the quality of structural relations among data, as well as quality of user interface featuring easy and simple search and display ...
    ... the WMS is a service by which the client can send a request to view a map from a server. This cartographic web service produces maps of georeferenced data by drawing them in the standard format for images (PNG, GIF, JPEG,...) and publishes them via the Web [10]. Web Feature Service (WFS) enables ...
    ... main international and industrial organization for standardization in the field of geospatial data. Web Map Service (WMS) is an OGC standard and at the same time the most popular and most widely used OGC Web service which specifies the communication between unrelated programs when sending or receiving ...

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)
    ... 4. Web service for query expansion Selection of words chosen for a query, which are of paramount importance for the quality of results obtained by the query, can be substantially improved by using various lexical resources. Morphological dictionaries enable morphological expansion of the query ...
    ... section 3 presents GeolISS search functionalities. Efficient exploration of such a valuable source of geologic data in view of the diversity and amount of archived data, which is of paramount importance for the quality of results obtained by the query, can be substantially improved by using various ...
    ... digital recording and management of geological data. Future upgrading must be guided by users and any future GeolISS development must follow the evolution of geospatial standards as well as technology trends. First results of the integration of the WS4QE web service with GeolISS demonstrates that ...

  • A WebGIS Decision Support System for Management of Abandoned Mines

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)
    ... level and quality of project work, both regarding the quality of content, namely data and information, but also regarding the quality of structural relations among data, as well as quality of user interface featuring easy and simple search and display od structured data. Development of the software ...
    ... Energies 2016, 9, 567 13 of 14 other domains. Special attention was given to securing a high level and quality of project work, both regarding the quality of content, namely data and information, but also regarding the quality of structural relations among data, as well as quality of user interface featuring ...
    ... the WMS is a service by which the client can send a request to view a map from a server. This cartographic web service produces maps of georeferenced data by drawing them in the standard format for images (PNG, GIF, JPEG...) and publishes them via the Web [26]. Web Feature Service (WFS) enables ...

  • Развој модела употребног квалитета помоћне механизације на површинским коповима лигнита

    Драгица Јагодић Крунић (2021)
    Тренутно стање помоћне механизације на површинским коповима лигнита је незадовољавајуће узроковано пре свега старошћу и неблаговременом заменом машима услед чега је расположивост недовољна а трошкови експлоатације и одржавања високи. Тренутно стање и захтеви који се постављају пред ове машине указују на неопходност оптимизације процеса управљања помоћном механизацијом. Одређивање оптималног времена замене и преосталих могућности је најодговорнији управљачки задатак који треба да буде заснован на свеобухватном сагледавању економских, техничких и других узрочно последичних веза. Са економског аспекта гледано треба одржавати ...
    помоћна механизација, употребни квалитет, ефективност, расположивост, сигурност функционисања, ризик, трошкови животног циклуса, фази логика, Монте Карло метода
    ... to the analysis of the quality of service gives the decision maker a myriad of useful information regarding the possible outcomes and the probability of their occurrence. The presented concept of evaluating the quality of service gives guidelines for optimizing the process of managing equipment ...
    ... applying the appropriate models of fuzzy composition (max-min, min-max, Cartesian products - ordered pairs) to higher levels of synthesis leading to the comprehensive evaluation of the quality of service. It completely absorbs all indicators of the quality of service and gives a synergy effect. It ...
    ... the quality of service of other technical systems in mining and industry. The model has been verified by a case study – the evaluation of the quality of service of dozers as the most numerous and most frequently used auxiliary machines. The results of the analysis show that there is the same tendency ...

  • Using technology for knowledge transfer between academia and enterprises

    Ivan Obradović, Ranka Stanković (2014)
    ... 804 Service, basically composed of a web application and a web service. When handling a query, the Language Web Service uses a component of the multipurpose tool LeXimir, namely the function library LeXimir_Core. A query ...
    ... 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 799 edX Terms of Service.4 An important ...
    ... s, blending of knowledge and establishing a continuity of knowledge acquisition still represents a challenge that needs new approaches and tools to be developed. Technology-enhanced learning (TEL) relies on information technology (IT) to offer support in improving the quality of learning and ...

  • Parametric analysis of slope stability on the example of municipal waste landfill in Vršac

    Basarić Irena, Rakić Dragoslav, Janković Jovana, Bogdanović Snežana, Đurić Tina (2018)

  • It-Sr-NER: Web Services for Recognizing and Linking Named Entities in Text and Displaying Them on a Web Map

    Olja Perišić, Ranka Stanković, Milica Ikonić Nešić, Mihailo Škorić (2023)
    The paper will present the results of the project `“It-Sr-NER: Web services for named entities recognition, linking and mapping,” in which teams from the University of Turin and the Society for Language Resources and Technologies JeRTeh participated, and whose goal was the development of the It-Sr-NER web service for named entity annotations in the text and displaying them on the map. Named entities in these services are names of persons, places, organizations, demonyms (ethnicities), events and works of art.
    General Engineering

  • Applying the Fuzzy Inference Model in Maintenance Centered to Safety: Case Study – Bucket Wheel Excavator

    Predrag Jovančić, Miloš Tanasijević, Vladimir Milisavljević, Aleksandar Cvjetić, Dejan Ivezić, Uglješa Bugarić (2020)

  • Mathematical modeling to define catchment size and real evapotranspiration (case study: Andrića karst spring, Western Serbia)

    Marina Čokorilo Ilić, Vesna Ristić Vakanjac, Dušan Polomčić, Dragoljub Bajić, Jelena Ratković, Bojan Hajdin (2018)
    Water resources in karst are extremely important sources of drinking water supply. The quality of groundwater formed in karst aquifers is generally high and in most cases only chlorination is required. However, from a hydrogeological perspective, these water resources are the least studied. Often only basic information is available on catchment size, groundwater reserves (dynamic and static, if any) and groundwater balance. Detailed hydrogeological investigations and long-term monitoring of karst spring discharges are needed to acquire such information. In ...
    karstno vrelo, veličina sliva, stvarna evapotranspiracija, karstno vrelo Andrića

  • 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 ...
    raspoloživost, fazi teorija, AHP višekriterijumska analiza, eksperska ocena, buldozer
    ... defining quality of service are not consistent, but have considerable ambiguity, and cannot be expressed quantitatively, so the model of integration, based on the theory of fuzzy sets, has been developed. Theories of fuzzy logic are specifically used for description and proposition of indicators ...
    ... method. The model contains structural decomposition of availability as an indicator quality of service of the engineering system, their independent analysis, and ranking, and finally gives the possibility of composition. Structural definitions of each outcome are given in accordance with the work ...
    ... Availability is expressed in quantitative indicators, and as such, is a measure of functional safety, and thus of the quality of service. Monitoring and availability analysis are significant because of the known fact that the machine must, above all, be available for operation, in order to realize other ...

  • The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje

    Boban Pavlović, Milica Pešić-Georgiadis (2019)
    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 ...
    Obnovljivi izvori energije, potencijal solarne energije, GIS, mapiranje solarnog potencijala
    ... it is. The extraction of the urban area of the city of Vranje is carried out using the CORINE Land Cover Open Data — the product of the Vvisual interpretation of high-resolution satellite imagery (Copernicus land Monitoring Service, 2019a). Corine means “coordination of information on the e ...
    ... Monitoring Service (CLMS) provides geographical information on the land cover to a broad range of users in the 12% International Conference on Energy and Climate Change, 9-11 October 2019, Athens - Greece field of environmental terrestrial applications (Copernicus land Monitoring Service, 2019b) ...
    ... cover changes (Copernicus land Monitoring Service, 2019a). Regarding the object of this study, using the ArcGIS software (ArcMap) it is possible to extract the urban area from CLC, originally defined as a class of Urban fabric, which is consisting of the next subclasses (20): • No. 111 - Continuous ...

  • Infotheca (Q25460443) in Wikidata

    Ranka Stanković, Lazar Davidović (2021)
    Vikipodaci su baza znanja Zadužbine Vikimedija koja predstavlja zajednički izvor različitih vrsta podataka koje koriste ne samo drugi Vikipedijini projekti, već sve više i brojne aplikacije semantičkog veba. U ovom radu ćemo prezentovati primer integracije Vikipodataka sa digitalnim bibliotekama i eksternim sistemima, kao i mogućnost ubrzanja pripreme i unosa podataka na primeru radova iz časopisa za digitalnu humanistiku Infoteka.
    semantički veb,otvoreni povezani podaci, vikpodaci,Infoteka, metapodaci časopisa
    ... wikibase:language "en,sr".} } ORDER BY DESC(?vol ) Figure 2. Wikidata Query Service query interface Figure 2 provides an illustration of the above query in the Wikidata Query Service user interface, where the upper part of the panel is used for Infotheca Vol. 21, No. 1, September 2021 95 Stanković ...
    ... Mathematics of the University of Belgrade and Wikimedia Serbia launched the (Wiki-Librarian) project in 2015 with the idea of making as much quality content as possible available on Wikipedia (Popović, Ševkušić, and Stakić 2015). Wikiadata, as an open data network was used by Andonovski (Андоновски ...
    ... way of exam- ple, here is a simple query, available at this site, showing a list of Infotheca articles, issue, volume and publication date. SELECT ?paper ?paperLabel ?vol ?publication ?publication_date WHERE { ?paper wdt:P1433 wd:Q25460443; wdt:P577 ?publication_date; wdt:P478 ?vol; SERVICE wik ...