Претрага

Упит dcterms_subject_txt:early warning system

710 items

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    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 ...
    ... mine ventilation networks - SimVent and a diagnostic expert system for ventilation system analysis - VENTEX. Besides the architecture of a hybrid system for mine ventilation planing and analysis the software implementation of this system is described, which comprises a symbolic upgrade of the existing ...
    ... 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 hybrid system INVENTS, as well as system structure and user interface. Keywords: ...
    ... 2. The INVENTS hybrid system Following the outlined strategy of planing, analysis and management of mine ventilation, a hybrid system named INVENTS has been developed, its architecture and concept being the subject of this book. Figure 2 illustrates the place hybrid system INVENTS has in contemporary ...

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...
    ekspertni sistem, ventilacija
    ... incorporating knowledge in software systems. In the late 80’s it has been recognized that expert system methods and techniques can be very useful in solving mine ventilation problems. The early 90’s already brought a number of knowledge-based applications in mine ventilation systems analysis ...
    ... the strategy of mine ventilation system analysis used in the VENTEX system and it formalization using a modification of the object- oriented analysis model as well as the basic architecture of the system and outlines the main features of the implemented system. 1. INTRODUCTION One of the ...
    ... The model was the basis for the implementation of the system in an object-oriented expert system shell. 3. ARCHITECTURE OF THE VENTEX The main components of the VENTEX system are basically a consequence of the fact that this system represents an upgrade of the existing numerical software ...

  • 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

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)

  • Coupling of artificial intelligence methods in the development of hybrid intelligent systems

    Ranka Stanković, Ivan Obradović, Nikola Lilić (2001)
    In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...
    hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije
    ... features of an intercommunicating hybrid system for mine ventilation planing and analysis. The architecture of the system is outlined as well as the characteristic of its components. Another hybrid intelligent system is presented in section 4. This is a hybrid system with both function-replacing and i ...
    ... relational database management system. The system offers safe data archiving for complex data models as this one, as well as all procedures for data manipulation. The use of SQL as a standard query language for data manipulation secures the openness of the hybrid system INVENTS for a connection with ...
    ... describe a hybrid system which enables reliable air pollution prediction by using neural network (NN) trained through a combination of genetic algorithm (GA) and the back propagation method. The global structure of the air pollution protection system is depicted in Figure 3. The system combines AI methods ...

  • An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System

    Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović (2006)
    In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...
    ... MIS is an intelligent system for supporting decision making in the mine, developed within the Technological Information System (TIS), using a combination of different IT technologies such as .NET, OLTP, OLAP, WEB, SQL Server Reporting Services and others. It is a system for direct analytical data ...
    ... connect this program system with the program system for technical graphics, because practically all maintenance works are carried out using technical documentation and corresponding drawings. Maintenance works are defined per every type of equipment. The basic module of this system is for issuing ...
    ... Management Information System Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System | Božo Kolonja, Ranka ...

  • 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

  • The State and Perspective of Belgrade District Heating System Development

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Fethi Silajdžić, Samra Arnaut, Goran Đelić (2019)
    District heating (DH) system in Belgrade provides energy for heating of more than 21 million m2 in households (app. 50% of all households), public, commercial and industry sectors. Public Utility Company “Beogradske elektrane” is responsible for all segments of the DH system operation. The system is fueled mostly by natural gas. The share of renewables is negligible. The research analyzes effects of implementation of two main projects proposed in the Development Strategy of the PUC - the introduction of ...
    daljinsko grejanje, Beograd, razvoj
    ... heating (DH) system in Belgrade provides energy for heating of more than 21 million m2 in households (app. 50% of all households), public, commercial and industry sectors. Public Utility Company “Beogradske elektrane” is responsible for all segments of the DH system operation. The system is fueled ...
    ... District Heating System Development Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Fethi Silajdžić, Samra Arnaut, Goran Đelić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The State and Perspective of Belgrade District Heating System Development | Dejan ...
    ... of experience in research and involvement in Serbian energy planning and policy making. The State and Perspective of Belgrade District Heating System Development Dejan Ivezić (presenter)1, Marija Živković1, Aleksandar Madžarević1, Fethi Silajdžić2, Samra Arnaut2, Goran Đelić 3 1University ...

  • A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice

    Nikola Lilić, Ivan Obradović, Ranka Stanković (2002)
    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 ...
    ... 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 hybrid system INVENTS, as well as system structure and user interface. 1. Introduction ...
    ... a hybrid intelligent system (HIS) developed with the help of available AI software libraries. 2. The INVENTS Hybrid System As we have already mentioned, the outlined approach to mine ventilation planning and design served as the basis for the development of a hybrid system named INVENTS (INtegrated ...
    ... diagnostic expert system that performs the analysis of these re- sults according to a number of criteria. The expert analysis by VENTEX yields an estimate of the validity and effectiveness of the ventilation system followed by suggestions for its improvement. The architecture of the system and the software ...

  • Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Tina Dašić (2023)
    Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment, Geography, Planning and Development, Building and Construction
    ... Krupaja System, the most complex system within the Kučaj- Beljanica massif, elsewhere, there are several, more complex systems with deep siphonal circulation of groundwater of subthermal and thermal character, among, which the Suvi Do and Krepoljinska Banjica System, the Sisevac System, and the ...
    ... water, in terms of temperature, chemical composition, and age, within the same karst system. In this research, complex investigations of the Krupaja arst system aimed to provide a large number of new results; the system was reviewed and analyzed and conclusions were made related to the genesis of the ...
    ... Beljanica Massif, a schematic overview of groundwater genesis and circulation of a complex karst system, i.e., the Krupaja system, is presented in Figure 7. As shown in this schematic profile, this is a system of the Beljanica Massif in which four types of circulation can clearly be differentiated. ...

  • 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 Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach

    Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependability

  • Design of the Opencast Coal Mine Drmno Dewatering System

    Vladimir Pavlović, Dušan Polomčić, Tomislav Šubaranović (2014)
    Development of mining in the opencast mine Drmno from Kostolac basin in Serbia is carried out in the increasingly complex geological and hydro geological conditions with the decline of the coal seams to the alluvial part of Europe's largest river Danube. Greater depth and inflow of groundwater significantly increase costs for dewatering facilities construction with the requirement for optimizing of this more and more important surface mining process. Making decision on screen construction in the opencast mine with redesign ...
    dewatering system, groundwater, hydrodynamic model, dewatering wells, screen, reliability, environmental effects.

  • Strain partitioning around an indenter during oroclinal bending: kinematics of the Circum-Moesian fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2021)
    ... Carpathians and with a large late Oligocene – middleMiocene Circum-Moesian fault system that affected the orogenic system surrounding the MoesianPlatform along its southern, western and northern margins. This fault system is composed ofvarious segments that have different and contrasting types of kinematics ...
    ... Circum-Moesian fault system. Our structural analysis shows that the major strike-slip faults are composed of multi-strandgeometries associated with significant strain partitioning within tens to hundreds of metres widedeformation zones. Kinematics of the Circum-Moesian fault system changes from transt ...
    ... transferredto thrusting in the Balkanides. The characteristic feature of the whole system is splaying of majorfaults to facilitate movements around the Moesian indenter. Splaying towards the east connectsthe Circum-Moesian fault system with deformation observed in the Getic Depression in front of the South ...

  • Production information system of the Pljevlja coal mine

    Božo Kolonja, Ranka Stanković, Filip Vuković (2018)

  • Strain partitioning along a curved strike-slip fault system during indentation: inferences from analogue modelling

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    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 ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving

  • Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2017)
    Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...
    ... Retrieval (CIIR), College of Information and Computer Sciences, Uni- versity of Massachusetts Amherst [2]. The Okapi system was originally developed at the Polytechnic of Central London in the early 1980’s and later developed at City University London and Microsoft Research [21]. A u t h o r P r o o f ...
    ... of the initial system is in general better among first-ranked documents than in the case of the improved system, with the excep- tion of the InQuery method, while the recall is better with the improved system. Although the precision-recall curves offer a pretty good insight into system performance, it ...
    ... comparison to the initial system, ranging from 0.36 to 0.46. It should be noted that for the query ležǐste bakra ‘copper deposit’ the improved system assigns two nouns, bakar ‘copper’ and bakra ‘copper cauldron’, but the results are nevertheless better in comparison to the initial system, which does not recognize ...

  • Data from the Digital Repository of the Faculty of Mining and Geology in eScience (eNauka)

    Biljana Rujević, Mihailo Škorić (2024)
    The paper describes linking the Digital Repository of the University of Belgrade, Faculty of Mining and Geology, with the eScience system in terms of transferring metadata about the results of researchers' scientific work. The steps taken to ensure a smooth harvesting of metadata are outlined. Additionally, a presentation of additional improvements to the OAI system is provided, aiming to contribute to the automatic linking of authors with their results in the eScience system.
    репозиторијуми, еНаука, метаподаци, Рударско-геолошки факултет

  • 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