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Упит dcterms_subject_txt:linguistic variables

101 items

  • Development of Integrated Fuzzy Model for Mine Management Optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    Technoeconomic, environmental and safety criteria generally affect the management of metallic and non-metallic mining operations. The first basic question that needs to be addressed when planning ore mining is which methods are adequate and what is the optimal mining technology? Due to the complex geologic framework of ore deposits, geological exploration has rendered synonymous the inherent uncertainties, vagueness, and inaccuracies. As a result, subjective evaluation by engineers and expert experience have become increasingly important. Given that the natural language ...
    mining technology, expert evaluation, triangular fuzzy numbers, multicriteria decision making

  • Quantitative landslide risk assessment in the city of Tuzla

    Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović (2021)
    In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...
    "landslides", "risk assessment"
    ... of nominal classes, given in the original and aggregated map, into sets of binary variables, so that each class gives a new sub-variable. For instance, engineering geological units were segregated into 9 sub-variables (9 new rasters), that are binary (1 = observed engineering geological class, 0 ...
    ... lines. Subsequently, Euclidean distance from this line vector was calculated for each pixel in the area of interest. All these represent numeric variables, which were further normalized to 0-1 range. Figure 4. Digital Terrain Model of the study area. 3.3 Environmental factors Environmental ...
    ... risk. This raster dataset was nominal, just as in the case of engineering geological units, so the same procedure of its aggregation into dummy variables was followed. Distance to mining sites was calculated to depict disturbed zones, since mining in Tuzla region includes open pit coal and underground ...

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd
    ... correlation coefficient is typically defined as a number, and provides an idea of how closely one variable is related to another [17]. The ratio of variables is reflected by the values of the determination co- efficient. The high coefficient of determination of Eqs. (3), (4), (5), and (6) has good correlation ...
    ... determination (r?) and standard error. Notably, the parameters (E,,—Ey>, E,q) obtained from the refer- ence test methods were used as dependent variables in the obtained regression model, while the CBRy,, parameter obtained by testing with the CBR, device was used as an independent variable. A circular ...
    ... for CBR+p in relation with deformation modulus E,q: +) measured, ·) predicted from Eq. (9). TABLE 1 Regression statistics – inde- Dependent variables pendent variable CBR+p, En E Ev Multiple R 0.902730052 0.882476059 0.930206737 R 0.814921546 0.778765959 0.865284574 Adjusted R 0.811065745 ...

  • Fourth Summer Datathon on Linguistic Linked Open Data

    Tijana Radović, Ranka Stanković (2023)
    The 4th Summer Datathon on Linguistic Linked Open Data (SD-LLOD-22) was held in Spain, in Cersedilla near Madrid, in May 2022, and organized by the COST Action NexusLinguarum. The school gathered interested researchers, academics, students who wanted to acquire and/or expand their knowledge in the field of linguistic linked data science. During the school, a spectrum of topics from the field of linked data was presented, from various ontologies, through document integration, annotation and natural language text processing tools ...
    linguistic linked open data, sentiment analysis, linked data, RDF

  • Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules

    Svetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón (2024)
    The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...
    Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analiza

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... and geologists is most suited for relaying: knowledge and expressing; opinions, the paper tests a fuzzy optimization methodology that uses linguistic variables. Consequently, extent analysis is applied to fuzzy AHP by means of triangular fuzzy numbers to arrive at a decision about the optimal mining; ...
    ... issues and fuzzy ogic is its integral part [1'2]. When fuzzy logic is used for multicriteria decision making., the criteria are described by linguistic variables and represented in the form of triangular fuzzy numbers (membership functions: “L, S, D”). On the one aand, the criteria are analyzed and ...
    ... and options. The calculations were made in a specially developed FUZZY-GWCS program [10], and the input elements were numerical values of linguistic variables. Table 1 shows the criteria matrix values and the calculated weight coefHicients. The scores and weights are represented by triangular fuzzy ...

  • 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
    ... its partial indicators (R, M, S). Five linguistic variables are introduced for each indicator, which are defined in the coordinate system of the membership function (µ), and the class as the representative of the unit of indicator measure (j) [20]. The linguistic variable (LV) is generally defined as ...
    ... ‘E’ = (1(1), 1(2), 0(3), . . . , 0(10)). Figure 3. Dependence of linguistic variables and membership function, the general form. Energies 2019, 12, 4044 6 of 18 For each partial indicator, a description of each linguistic variable is defined. The following descriptions are given below: Re ...
    ... conceptual model y expert systems with hybrid data. Unlike the classic crisp logic, fuzzy values are defined with membership function to proper linguistic variables [3]. The max–min composition was used, where the outcomes were defined as the mean value. In reference [14], the fuzzy theory was also used ...

  • Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization

    Maja Todorović, Jana Štrbački, Marina Ćuk, Jakov Andrijašević, Jovana Šišović, Petar Papić (2016)

  • Dvodimenzionalna geometrijska morfometrija prvih gornjih molara hominina sa teritorije Srbije - taksonomska i metodološka analiza

    Predrag N. Radović (2022)
    Primarni cilj ove studije tiče se taksonomske identifikacije fosilnih prvih gornjih molara (M1) hominina pronađenih u Srbiji, primenom metoda dvodimenzionalne (2D) geometrijske morfometrije. U prvoj (metodološkoj) fazi istraživanja ispitana je efikasnost 16 različitih pristupa (geometrijskih modela) u klasifikaciji M1 neandertalaca i anatomski modernog čoveka. Modeli su testirani na dva seta okluzalnih projekcija krunica (n = 34 i n = 64) dobijenih orijentisanjem digitalnih 3D modela u virtuelnom okruženju ili fotografisanjem fizičkih primeraka zuba. Prilikom testiranja primenjena je klasifikacija zasnovana ...
    2D geometrijska morfometrija, prvi gornji molar (M1), taksonomska identifikacija, neandertalci, anatomski moderni ljudi, Pešturina, Velika Balanica, Srbija

  • Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...
    Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatori

  • Fuzzy Model for Risk Assessment of Machinery Failures

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...
    fazi teorija, rizik, otkaz rudarskih mašina
    ... n Fuzzy proposition is a process of defining an observed phenomenon in terms of linguistic variables, i.e., allocating linguistic values to the indicators of the observed phenomenon. The defined linguistic variables that describe fuzzy sets for risk level indicators are minor, low, moderate, high ...
    ... of the membership function, which is caused by the linguistic variables mentioned, is a triangle in this model (Figure 2). According to Ivezić et al. [26], membership functions should have a symmetric, triangular shape for more precise linguistic terms. A fuzzy model uses symmetric fuzzy sets, a symmetric ...
    ... The concept of class is sufficiently recognizable and defines the level of quality. Here, five linguistic variables and 10 classes were adopted for the proposed model. The fuzzy sets for each linguistic variable are presented in the following form: µj = (µi = 1, . . . , µi =10). (1) 3.2. Fuzzification ...

  • Environmental Energy Security Indicators as Tools for Environmental Protection

    Aleksandar Madžarević, Dejan Ivezić, Marija Živković , Miloš Tansijević (2019)
    Еколошка прихватљивост је постала незаменљив синтезни показатељ сваке валидне енергетске анализе у последње две-три деценије. Енергетска безбедност је у директној хармонији с еколошком прихватљивошћу кроз многе прописане политичке циљеве, економске користи, правне тековине итд. Индикатори еколошке сигурности представљају један од основних елемената за одређивање енергетске безбедности и снажне алате за усмеравање енергетског сектора ка одрживом развоју. У овом раду, анализа је била концентрисана на показатеље енергетске безбедности у области животне средине који се односе на сектор природног гаса у ...
    енергетска безбедност, еколошки енергетски индикатори, заштита животне средине, еколошка прихватљивост
    ... questionnaire was formed. They are the basis for expert analysis of the Indirect environmental effect. The surveyed analysts select one or more linguistic variables within the questionnaire in a proportion that most accurately describes the partial indicator. 3.4 Synthesis of Environmental Acceptability ...
    ... FUZZIFICATION FUZZY ENGINE IDENTIFICATION ENVIRONMENTAL ACCEPTABILITY Input data Input Fuzzy set Output Fuzzy set Linguistic Variables Proposition of fuzzy set Integral analisis Fuzzy composition Questioners; Monitoring; Statistical work Best-fit method ...
    ... 0,02 0,34 0,58 0,592 0,533 0,4 0,16 0 0 Environmental energy security indicator for this combination of scenario is dominantly described with variables ”high” (31%). The environmental energy security value in scenario OPT-REF is, for the most part, located to the right within the field describing ...

  • OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian

    Ranka Stanković, Maxim Ionov, Medina Bajtarević, Lorena Ninčević (2024)
    Ovaj rad predstavlja novi jezički resurs za pretraživanje i istraživanje verbalnih aspektnih parova u BCS (bosanskom, hrvatskom i srpskom), kreiran korišćenjem principa Lingvističkih Povezanih Otvorenih Podataka (LLOD). Pošto ne postoji resurs koji bi pomogao učenicima bosanskog, hrvatskog i srpskog kao stranih jezika da prepoznaju aspekt glagola ili njegove parove, kreirali smo novi resurs koji će korisnicima pružiti informacije o aspektu, kao i link ka aspektnim parovima glagola. Ovaj resurs takođe sadrži spoljne linkove ka monolingvalnim rečnicima, Wordnetu i BabelNetu. ...
    aspekt glagola, lingvistički otvoreni podaci, BCS

  • An Approach to Efficient Processing of Multi-Word Units

    Cvetana Krstev, Ivan Obradović, Ranka Stanković, Duško Vitas (2013)
    Efficient processing of Multi-Word Units in the course of development of morphological MWU dictionaries is not easy to achieve, especially when languages with complex morphological structures are concerned, such as Serbian. Manual development of this type of dictionaries is a tedious and extremely slow process. To alleviate this problem we turned to our multipurpose software tool, dubbed LeXimir, in the production of lemmas for e-dictionaries of multi-word units. In addition to that, we developed a procedure aimed at making ...
    Natural Language Processing, Grammatical Category, Lexical Representation, MWU, multi-word unit
    ... inflectional graph in Figure 1 illustrates this. A MWU serving as lemma is tokenized and its tokens become values of variables: in the case of petokraka zvezda values of variables become $1=petokraka, $2=, $3=zvezda while in the case of Farenhajtov stepen they are $1=Farenhajtov, $2= ...
    ... unification variables. A unification variable instantiates to all values of the corresponding grammatical feature. For Serbian, a pattern <$3:Case=$c> means that forms for all cases — 7 different values — will be generated for the third to- ken. The occurrence of the same unification variables in the same ...
    ... Université de Marne-la-Vallée (2000) 16. Savary, A.: Computational Inflection of Multi-Word Units — A Contrastive Study of Lexical Approaches. Linguistic Issues in Language Technologies 1(2) (2008) 17. Savary, A.: Multiflex: A Multilingual Finite-state Tool for Multi-Word Units. In: CIAA, pp. 237–240 ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... potential issues in the deep well pumping system operation. 3.2.3 Downhole dynamogram The surface dynamogram results from the influence of all variables in the portion of the system above the depth of the deep well pump installation, and therefore it is not alvays sufficient for precise diagnosis ...
    ... boundaries between different pump conditions. c.Decision Trees and Random Forests- Used for decision-making based on combinations of different variables and can be useful for identifying important features indicating faults. d.Neural Networks- Deep models capable of learning complex patterns in ...
    ... vibration levels or pressure that may indicate the pump's condition. b.Polynomial Regression - Used for modeling complex relationships between variables, which can help in predicting complex patterns in pump behavior. • ModelTraining a.Training - The model is trained on labeled data. In this ...

  • A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, environmental, and socio-political criteria. For the evaluation of criteria and alternatives, the Fuzzy Analytical Hierarchy Process (FAHP) method is applied. The obtained weights are formed according to the values of energy indicators and expert judgments. The use of a fuzzy numerical value scale for the assessment of expert judgments and energy indicators provides a more sensitive ...
    Proizvodnja električne energije, Obnovljivi izvori energije, Višekriterijumsko odlučivanje, Srbija
    ... a higher share for 45.52%, i.e., biomass has ‘‘absolute importance’’ over wind energy. Each of the linguistic variables is assigned one of the triangular fuzzy numbers (TFNs). The linguistic variables and corresponding intervals of the differences of indicator values’ share, as well as the appropriate ...
    ... research. Experts assigned a linguistic variable to each pair of criteria by making a pairwise comparison with respect to the priority of identified criteria, as well as a pairwise comparison of RESs with respect to socio-political criterion. Each of these linguistic variables is assigned one of the triangular ...
    ... judgments, the GM is 4 B. Pavlović, D. Ivezić and M. Živković Energy Reports xxx (xxxx) xxx Table 3 Fuzzy AHP scale (Ren and Sovacool, 2014). Linguistic variables Intervals of differences TFNs Reciprocal TFNs Equal importance 0%–1% 1, 1, 1 1, 1, 1 Weak importance 1.1–2.5% 2/3, 1, 3/2 2/3, 1, 3/2 Moderate ...

  • Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma

    Jasna Mihailović, Ljubomir Stefanović, Ranka Stanković (2013)
    ... considered as G5 Hg/L and G1.00 ng/mL, respectively). Statistical Analysis The W2 test was used to analyze variables. The Kaplan-Meier method and log-rank test were used to calculate time-dependent variables using statistical software SPSS version 8 (SPSS Inc, Chicago, IL). Avalue of P G 0.05 was considered ...
    ... evaluating the effect of RAI therapy indicated no improvement on survival or mortality, even in high-quality studies adjusted for stage/risk or other variables. Sawka et al37 reported that RAI ablation reduced a risk of distant metastatic recurrence (P = 0.005). Our results indicate that patients who re- ...

  • Mine ventilation system planning using genetic algorithms

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...
    coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methods

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... growth. [6] In 2014, HTL group founded The Society for Language Resources and Technologies, dubbed JERTEH in order to promote all branches of linguistic technology at scientific, professional and practical level. 3 The latest research 3http://jerteh.rs/index.php/osnivaci/?lang=en results in ...
    ... eu).  Terminological web application for management, browse and search of terminological resources (work in progress).  Web services for linguistic support (query expansion, information retrieval, OER indexing, etc.) (http://hlt.rgf.bg.ac.rs/)  Annotation of selected resources 4 ...
    ... have already been developed. Unitex 11 is an open source system consisting of a collection of programs developed for text analysis by using linguistic resourcesprogramme.[11] Unitex is based on finite-state technology. It enables application of morphological electronic dictionaries and ...

  • The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system

    Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)
    The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...
    микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми
    ... ILIĆ efa/: THE INFLUENCE OF ALKYL POLYGLUCOSIDES... Chem. Ind. Chem. Eng. Q. 22 (1) 27–32 (2016) The convenient variables are the temperature and the following composition variables (pressure is always kept constant) - the mass fraction of oil in the mixture of water and oil: 0 = a {(ma + me) ...