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Упит dcterms_subject_txt:Statistical and Nonlinear Physics

2451 items

  • Multi-word Expressions for Abusive Speech Detection in Serbian

    Ranka Stanković, Jelena Mitrović, Danka Jokić, Cvetana Krstev (2020)
    Ovaj rad predstavlja istraživanja na usavršavanju i unapređenju srpske verzije rečnika Hurtlex, višejezičnog leksikona uvredljivih reči. Posebnu pažnju posvećujemo dodavanju izraza sa više reči (polileksemskih jedinica) koji se mogu smatrati uvredljivim, jer su takvi leksički zapisi veoma važni za postizanje dobrih rezultata u mnoštvu zadataka otkrivanja uvredljivog jezika. Srpski morfološki rečnici se koriste kao osnova za čišćenje podataka i stvaranje rečnika. Istaknuta je veza sa drugim leksičkim i semantičkim resursima na srpskom jeziku i predviđena je izgradnja sistema za ...
    uvredljiv govor, govor mržnje, leksički izvori, višejezični leksikon, izrazi sa više reči

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija
    ... forest classification (RF), and bootstrap aggregate classification trees with penalized discriminant analysis (BPLDA) for multiple areas of Lower Austria. Their study showed small differences of prediction performances between statistical and ML approach for LAM. RF and BDPA showed the best prediction ...
    ... (NB), AHP and LR for LAM, and they also concluded that SVM, NB and LR (all of them had >80% accuracy) outperformed AHP (with 69% accuracy). Although Ciurleo et al. (2017) did not deal with ML technique, it is safe to infer some conclusions from their work. They suggested that statistical (simple ...
    ... model evaluation, many statistical measures are introduced and used for that purpose. Some of the most commonly used for landslide model eval- uation are Relative Operating Characteristic (ROC) curve, sensitivity, specificity, area under the ROC curve (AUC) and kappa statistics and its variations. ROC ...

  • Arsenic in Tap Water of Serbia´s South Pannonian Basin and Arsenic Risk Assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    kvalitet podzemnih voda, arsen, analiza rizika, Panonski Basen

  • The Use of the Omeka Semantic Platform for the Development of the University of Belgrade, Faculty of Mining and Geology Digital Repository

    Petar Popović, Mihailo Škorić, Biljana Rujević (2021)
    Under the regulations of the Ministry of Education, Science and technological Development, a digital repository based on the Omeka S data storage platform has been developed for the Faculty of Mining and Geology. The platform has been upgraded with the required modular extensions, Solr index and automatic OCR. Furthermore, document indexing and search have been fine-tuned with the aid of e-dictionaries of the Serbian language, which has brought about outstanding results in terms of usage facilitation and overall ...
    Дигитални репозиторијум, Омека, претрега дигиталних библиотека

  • 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
    ... advantages and disadvantages of using the system, and emphasizes the importance of IPCC system implementation in open pit mines. 2. DESCRIPTION AND CLASSIFICATION OF IPCC SYSTEMS In the technological sense, an IPC system performs feeding, crushing, conveying and discharging system [5, 6] and it can ...
    ... Reclamation, and Environment, In-pit crushing and conveying technology in open-pit mining operations: a literature review and research agenda. 2020. 34(6): p. 430-457. 6. Darling, P.J.M. and Exploration, SME mining engineering handbook: Society for Mining. 2011: p. 941–956. 7. Oberrauner, A. and D. Turnbull ...
    ... loading and hauling have always been a significant part of capital and operating costs with a share of 65-70% of the total. In this sense, the optimization of the loading and hauling system can have a significant impact on the mining economy [2]. In most surface mines, a combination of Trucks and Shovels ...

  • Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia

    Jelka Krušić , Biljana Abolmasov, Miloš Marjanović (2021)
    The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...
    tecišta, zadržavanje nanosa, RAMMS, validacija
    ... height H (x, y,t) and flow velocity U (x, y,t) and is given by: 𝑄(𝑥, 𝑦, 𝑡) ˙ = 𝜕𝑡𝐻 + 𝜕𝑥 (𝐻 𝑈𝑥 ) + 𝜕𝑦 (𝐻 𝑈𝑦 ) (1) Where Q(x, y,t) describes the mass production source term, and Ux and Uy represent the depth- averaged velocities in horizontal directions x and y (Christen et ...
    ... volume, and Vero-eroded volume This small values are real regarding to very huge initial volume and depths in main block (Selanac 30 m maximum, Leva reka 17m maximum) and could be concluded that is connected with large occasions and deep source areas. J. Krušić, B. Abolmasov and M. Marjanović ...
    ... analysis of pre vent and post event DEM, and ERT investigation. Comparison of two epochs DEM helped in better defining source area and precise eroded zone. Estimated deposition volumes, heights and erosion depths are given in Tab 2. Table 2 Comparison of estimated and calculated results ...

  • Application of the VIKOR Method for Selecting the Purpose of Recultivated Terrain after the End of Coal Mining

    Radmila Gaćina, Sanja Bajić, Bojan Dimitrijević, Tomislav Šubaranović, Čedomir Beljić, Dragoljub Bajić (2024)
    rekultivacija, ugalj, održivi razvoj, višekriterijumsko odlučivanje, VIKOR

  • Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept

    Uroš Đurić, Miloš Marjanović, Zoran Radić, Biljana Abolmasov (2019)
    Improvements of Machine Learning-based landslide prediction models can be made by optimizing scale, customizing training samples to provide sets with the best examples, feature selection, etc. Herein, a novel approach, named Cross-Scaling, is proposed that includes the mixing of training and testing set resolutions. Hypothetically, training on a coarser resolution dataset and testing the model on a finer resolution should help the algorithm to better generalize ambiguous examples of landslide classes and yield fewer over/underestimations in the model. This ...
    klizišta, podložnost, mašinsko učenje
    ... accuracy of statistical vs. Machine Learning methods in LSA. They concluded that in terms of pure prediction accuracy, RF and Bootstrap Penalized Linear Discriminant Analysis (BPLDA) were the best model- ling techniques. Youssef et al. (2016) combined four Machine Learning techniques and selected eleven ...
    ... J. Appl. Geophys. 59, 126–139. https:// doi.org/10.1016/j.jappgeo.2005.09.001. Dumlao, A.J., Victor, J.A., 2015. GIS-aided Statistical Landslide Susceptibility Modeling and Mapping of Antipolo Rizal (Philippines). IOP Conf. Ser. Earth Environ. Sci. 26, 12031. Federici, B., Bovolenta, R., Passalacqua ...
    ... Geol. https://doi.org/10.1016/j.enggeo.2009. 12.004. Goetz, J.N., Brenning, A., Petschko, H., Leopold, P., 2015. Evaluating machine learning and statistical prediction techniques for landslide susceptibility modeling. Comput. Geosci. 81, 1–11. https://doi.org/10.1016/j.cageo.2015.04.007. Gojgić, D ...

  • Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world

    Bogoljub Vučković, Bojan Dimitrijević (2023)
    The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...
    lignite, heavy metals, concentrations
    ... pits of Stari Kostolac and Ćirikovac, after that in the surface mines of Klenovnik and Cirikovac, picture 2) and are not being excavated now; 177 2. Now in the excavation phase are some parts of 1, II and III layers (I and II layers in Kovin by underwater exploitation; II and III layers in the Drmno ...
    ... seams and perform a comparative analysis of coal af}ectation on the environment. P/ith 155 analyzes of HM from coal, 45 from ash, 165 from gravel and 30 from soil, we perform analysis of horizontal and vertical distribution of HM and comparative analysis. B/hat interests us as authors and you as ...
    ... the Velika Morava and Mlava rivers, which flow into the Danube in that area (figure 1 and 2). Itis divided into two parts by the Danube - to the south is the Kostolac Basin, and to the north ofthe Danube is the Kovin Basin (Figure 2). Geological explorations began in 1941 and continues to this day ...

  • Application of the VIKOR Method for Selecting the Purpose of Recultivated Terrain after the End of Coal Mining

    Radmila Gaćina, Sanja Bajić, Bojan Dimitrijević, Tomislav Šubaranović, Čedomir Beljić, Dragoljub Bajić (2024)
    reclamation, coal, sustainable development, multi-criteria decision making, VIKOR method

  • Two approaches to compilation of bilingual multi-word terminology lists from lexical resources

    Branislava Šandrih, Cvetana Krstev, Ranka Stanković (2020)
    In this paper, we present two approaches and the implemented system for bilingual terminology extraction that rely on an aligned bilingual domain corpus, a terminology extractor for a target language, and a tool for chunk alignment. The two approaches differ in the way terminology for the source language is obtained: the first relies on an existing domain terminology lexicon, while the second one uses a term extraction tool. For both approaches, four experiments were performed with two parameters being ...
    Linguistics and Language,Software,Artificial Intelligence,Language and Linguistics
    ... Skadina, Tadić and Gornostay 2012; Hamon and Grabar 2016; Oliver 2017; Arcan, Turchi, Tonelli and Buitelaar 2017). For the extraction of terminology on the target side, we apply morphological and statistical analysis. A similar approach was taken by other authors (Bouamor, Sem- mar and Zweigenbaum 2012; ...
    ... Thompson P., and Ananiadou, S. 2014. A Hybrid Approach to Compiling Bilingual Dictionaries of Medical Terms from Parallel Corpora. Statistical Language and Speech Processing, volume 8791 of LNCS, pages 57-69. Kovačević, L., Begenišić, D. D., and Injac-Malbaša, V. 2014. Dictionary of library and information ...
    ... that combines statistical calculus and linguistic knowledge, followed by applica- tion of GIZA++ phrase-table scores for alignment of statistically estimated terms. Fawi and Delmonte (2015) Syntactic patterns are formulated to identify candidate terms, which were then ranked by statistical association ...

  • The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis

    Ljiljana Vasić, Dragana Ž. Živojinovic, Vladana Rajaković-Ognjanović, Huang Fen, Cao Jianhua (2021)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Bridging Computational Lexicography and Corpus Linguistics: A Query Extension for OntoLex-FrAC

    Christian Chiarcos, Ranka Stanković, Maxim Ionov, Gilles Sérasset (2024)
    OntoLex, dominantni standard zajednice za mašinski čitljive leksičke resurse u kontekstu RDF-a, Linked Data i tehnologija Semantičkog veba, trenutno se proširuje sa posebnim modulom za Frekvencije, Primere i Informacije zasnovane na Korpusu (OntoLex-FrAC). Predlažemo novi komponent za OntoLex-FrAC, koji se bavi inkorporacijom korpusnih upita za (a) povezivanje rečnika sa korpusnim mašinama, (b) omogućavanje RDF baziranih web servisa da dinamički razmenjuju korpusne upite i podatke odgovora, i (c) korišćenje konvencionalnih upitačkih jezika za formalizaciju unutrašnje strukture kolokacija, skica reči i ...
    standardizacija, digitalna leksikografija, OntoLex, upiti korpusa, povezani podaci, Lingvistički povezani otvoreni podaci

  • Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals

    Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić (2020)
    As the number of poorly soluble drugs is increasing, nanocrystals have become very interesting due to wide range of application possibilities. Curcumin was used as a model active ingredient in this work. Even though it has many proven positive effects, due to its physicochemical issues, its possibilities have not been fully exploited. The goal of this work was to select optimal conditions for a top-down method for curcumin nanosuspension production, and to perform their comprehensive characterization applying complementary methodologies: ...
    nanocrystal, curcumin, top-down method, wetball milling

  • Antioxidant and antimicrobial activity of some tetradentate Schiff bases and their Cu (II) complexes

    Aleksandar Mijatović, Milan Nikolić, Snežana Spasić, Aleksandra N. Žerađanin, Kristina Joksimović, Aleksandar Lolić, Rada Baošić (2020)
    Šifove baze i njihovi Cu(II) kompleksi su poznati po svojoj biološkoj aktivnosti. U ovom radu proučavana je antibakterijska aktivnost protiv gram-negativnih sojeva Escherichia coli, Pseudomonas aeruginosa i Staphilococcus piogenes, kao i Gram-pozitivnih Staphilococcus piogenes i Pseudomonas aeruginosa, zajedno sa antifungalnim dejstvom protiv Musperg strainilusa, A. Takođe, tehnički jednostavni i brzi testovi kao što su ABTS, HORAC i ORAC korišćeni su za ispitivanje antioksidativne aktivnosti kako bi se uporedili dobijeni rezultati sa različitim tipovima testova. Uprkos tome što je princip ...
    ... РГФ] Antioxidant and antimicrobial activity of some tetradentate Schiff bases and their Cu (II) complexes | Aleksandar Mijatović, Milan Nikolić, Snežana Spasić, Aleksandra N. Žerađanin, Kristina Joksimović, Aleksandar Lolić, Rada Baošić | XIII Conference of Chemists, Technologists and Environmentalists ...
    ... ABSTRACT METHODS AND MATERIALS CONCLUSIONS REFERENCES CONTACT A series of Schiff bases and their Cu (II) complexes show a wide range of biological activities. We investigated the interactions between a series of biologically important Cu(II) compounds against Gram-negative and as Gram- positive ...
    ... Gram-negative strains of Escherichia coli, Pseudomonas aeruginosa and Staphylococcus pyogenes, as well as Gram-positive Staphylococcus pyogenes and Pseudomonas aeruginosa was studied. Antifungal activity against Candida, Aspergillus, and Mucor strains was also studied for the same set of compounds. ...

  • Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia

    Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)
    Stratigraphy,Economic Geology,Geology,Geophysics,Oceanography
    ... isorenieratane, m/z 181 and m/z 195 for methyl- and dimethyl-carbazoles, along with m/z 121, m/z 135, and m/z 149 for δ-, β- and γ-, and α-alkyl isomers of chromans, re- spectively. 4. Results 4.1. Lithology and mineralogy The studied profile of the Čučale (460 m thick) and Prebreza (540 m thick) units ...
    ... 14 km and a width of 10 km, covering an area of about 20 km2. The area of Toplica Basin consists of Precambrian and Palaeozoic schist, Mesozoic sediments and ophiolites, and Cenozoic magmatic, pyr- oclastic, and sedimentary rocks. The Toplica Basin is filled up with Miocene freshwater and coal-bearing ...
    ... lacustrine or highly restricted marine environments (Hall and Douglas, 1983; Jiang and Fowler, 1986; Fu et al., 1990). Sediments deposited in pronounced saline and anoxic environments are characterized by accumulated and well-preserved OM (Meyers and Ishiwatari, 1993; Burone et al., 2003; Pichevin et al ...

  • Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example

    Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska (2020)
    ... such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher ...
    ... behind, 85,000 affected and € 30 million worth of damage. Floods, torrents and landslides that followed, demonstrated shear natural force and interrupted traffic in several major cities in the north, for days. However, the message was received and understood, which is why local and state governments in ...
    ... middle, while Mt. Shar Planina and Korab to the W-NW and Mt. Suva Gora to the E-SE dom- inate the landscape. Main cities are Tetovo and Gostivar, but there are also many villages on the steep slopes. There is a well-developed state and local road network, railway, and hydro-energetic system Mavrovo ...

  • A Lexical Approach to Acronyms and their Definitions

    Cvetana Krstev, Duško Vitas, Ranka Stanković (2015)
    In this paper we present a comprehensive approach to acronyms for Natural-Language Processing (NLP) of Serbian texts. The proposed procedure includes extraction of acronyms and their definitions that are usual Multi-Word Units (MWUs), shallow parsing of MWUs that enables MWU lemmatization and production of entries in morphological electronic dictionaries, both for MWU and acronyms, that are provided with grammatical, syntactic, semantic and domain information. This approach enables representation that reflects complex relations between acronyms and their definitions.

  • Possibility of application of fuzzy logic for stability assessment of underground facilities

    Luka Crnogorac, Rade Tokalić, Đurica Nikšić, Saša Jovanović (2019)
    Rudnici sa podzemnom eksploatacijom uglja u Republici Srbiji deo su Javnog preduzeća za podzemnu eksploataciju uglja Resavica (JP PEU). U rudnicima kompanije JP PEU podzemne prostorije se trenutno grade tehnologijom bušenja i miniranja. Ova metoda, koja se koristi u srpskim rudnicima uglja, pokazala je svojom brzinom, efikasnošću, troškovima i drugim elementima da više nije prihvatljiva. Klasičan metod izgradnje podzemnih prostorija ne omogućava zadovoljavajuću produktivnost, jer se tehnološke operacije ovog metoda, bušenje i miniranje, izvode ručno i zahtevaju neprihvatljivo mnogo ...
    analiza, podzemna prostorija, mehanizovana izgradnja, rudnik

  • Multihazard Exposure Assessment on the Valjevo City Road Network

    Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović (2019)
    Prirodni hazardi, izloženost, klizišta, poplave, bujice, GIS, R
    ... landslide susceptibility and hazard are available, but they diverge significantly, depending on the data availability, common practice, required level of detail, and so forth (Corominas et al., 2014). Herein, a relatively simple approach was used. It combines statistical and analytical hierarchy process ...
    ... details on the Valjevo case study area, methodology, and materials, and then, the modeling results of all three hazards and their combination will be discussed and concluded. 31.1.1 The State of the Art The state-of-the-art approaches for solving these and many other natural hazards necessarily involve ...
    ... e, and other socioeconomic elements to a certain level of haz- ard, which further defines the level of risk that these elements endure and must cope with. Valjevo is one of the regional centers in western Serbia and its urban sprawl and economic activities, based on light industry, mining, and agriculture ...