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Упит dcterms_subject_txt:Hierarchical cluster analysis

754 items

  • Geothermal potential, chemical characteristic and utilization of groundwater in Serbia

    Tanja Petrović Pantić, Katarina Atanasković Samolov, Jana Štrbački, Milan Tomić (2021)
    To collect and unify data about all geothermal resources in Serbia, a database was formed. The database allows us to perceive the geothermal resources of Serbia and their potential for utilization. Based on the data available in the geothermal database, the estimated temperatures of reservoirs, heat power, and geothermal energy utilization were calculated. The database contains 293 geothermal records (springs, boreholes) registered at 160 locations, with groundwater temperatures in the range between 20 and 111 °C. The maximum expected ...
    Geothermal database, Geothermal resources, Geothermal potential, Hydrochemistry, Hierarchical cluster analysis, Serbia

  • 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)

  • 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

  • Hydrochemical changes and groundwater grouping data by multivariate statistical methods within one karst system: recharge–discharge zone (Eastern Serbia case study)

    Ljiljana Vasić, Dragana Živojinović, Vladana Rajaković-Ognjanović (2020)
    Geochemistry and Petrology

  • Hydrochemical indicators of groundwater flow in the area of “Čukaru Peki” Cu-Au underground mine in eastern Serbia

    Nebojša Atanacković, Vladimir Živanović, Jana Štrbački, Veselin Dragišić, Ivana Cvejić (2022)
    The physical and chemical properties of groundwater, together with the groundwater levels regime and rock hydraulic properties, are often used to understand and conceptualize the hydrogeological system. Prediction of the influence of mining works on groundwater, and vice versa, is a challenge due to significantly altered groundwater flow patterns in the raw materials exploitation areas in relation to natural conditions. Therefore, multiple parameters are assessed and monitored before and during exploitation to properly characterize and quantify the system for ...
    mine water, hydrogeology, multivariant statistics, groundwater inflow, water quality

  • Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series

    Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)
    Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...
    deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija
    ... observed displacement. Data obtained by monitoring can be clustered in different ways, for example, a cluster composed of marker displacement over time separately (∆ v12, ∆v32, ∆v24, . . .), a cluster composed of each row or column data of the matrix ∆V. We focus on each column data in order to see how ...
    ... of observed displacement. Data obtained by monitoring can be clustered in different ways, for example, a cluster composed of marker displacement over time separately (Av17, Av32, Avo4,...), a cluster composed of each row or column data of the matrix AV. We focus on each column data in order to see how ...
    ... Y(t) = (µ1(t), µ2(t), . . . , µn(t)) = ∑n i=1 max•min(O(t), Ai), µi(t) ≥ 0, (23) Fuzzified observation of displacement at time point t belongs to cluster Ai if and only if their intersection has the highest value of membership function; µi(t)→ max. Each µi(t) is calculated according to Figure 4, re ...

  • Cluster synchronization of spiking induced by noise and interaction delays in homogenous neuronal ensembles

    Franović Igor, Todorović Kristina, Vasović Nebojša, Burić Nikola (2012)

  • Debris-flow Susceptibility Assessment in Flow-R: Ribnica River Case Study

    Ksenija Micić, Miloš Marjanović, Biljana Abolmasov (2024)
    Debris flows are among the most dangerous erosional geohazards due to the fast rate of movement and long runout zones. Even though the initiation can be triggered in mountainous areas, inhabited and with steep slopes, their propagation and deposition can endanger not only buildings and infrastructure in the urbanized areas, but also threaten human lives. As these initiation areas usually represent unattainable terrains with rapid vegetation cover development, field observations and aerial photo analysis become high-demanding tasks. Consequently, medium-to-regional ...
    tečenje drobine, Flow-R, procena podložnosti, empirijski model

  • Resource-based WordNet Augmentation and Enrichment

    Ranka Stanković, Miljana Mladenović, Ivan Obradović, Marko Vitas, Cvetana Krstev (2018)
    In this paper we present an approach to support production of synsets for SerbianWordNet(SerWN)byadjustingPrincetonWordNet(PWN)synsetsusing several bilingual English-Serbian resources. PWN synset definitions were automatically translated and post-edited, if needed, while candidate literals for Serbian synsets were obtained automatically from a list of translational equivalents compiled form bilingual resources. Preliminary results obtained from a setof1248selectedPWNsynsetsshowthattheproducedSerbiansynsetscontain 4024 literals, out of which 2278 were offered by the system we present in this paper, whereas experts added the remaining 1746. Approximately one half of ...
    WordNet, bilingual resources, term alignment, parallel lists
    ... for a cluster of European languages, and BalkaNet -BWN (Tufis et al., 2004) for a cluster of languages from the Balkans. The EuroWordnet and BalkaNet projects extended the PWN approach by introducing an Inter- Lingual Index (ILI), used to align synsets in different languages within each cluster on basis ...
    ... the average number of literals per synset in PWN is 2.01, whereas the average number of literals per synset in SerWN is 1.66. After the initial analysis, we used the 20,221 aligned synsets to produce a parallel list of 72,262 literals for the purpose of this research. For example, we used the aligned ...
    ... these resources. One of the goals of our approach is to further develop the semi-automatic procedure to enable automatic evaluation, periodical analysis and automatic extraction of XML synsets structure for further processing and integration into SWN with sumo, sentiments, relations etc. In our approach ...

  • Frequency and Length of Syllables in Serbian

    Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová (2019)
    Basic analyses of several properties of syllables (the rank-frequency distribution, the distribution of length, and the relation between length and frequency) in Serbian is presented. The syllabification algorithm used combines the maximum onset principle and the sonority hierarchy. Results indicate that syllables behave similarly to words as far as mathematical models are concerned, but values of parameters in models for syllables are quite different from those for words.
    frekvencije slogova, dužina slogova, srpski jezik
    ... on, a large enough corpus is needed to perform statistical tests, based on which a decision on the (non-) marginality of a particular consonant cluster is made. Finding or creating such a corpus can be problematic for minor languages (such as e.g. Lower and Upper Sorbian among Slavic languages). ...
    ... principle. If some irregularities which contradict these two principles occur at the beginning of a word (i.e. if a word begins with a consonant cluster in which sonority decreases; examples from different languages are presented in Clements, 1990, p. 288), we take these onsets as they are. It must ...
    ... definition, but it facilitates easy automatic text processing (see e.g. a discussion on this topic in Antić et al., 2006, pp. 118-121). The text under analysis (see Section 3) is pre-processed, so that it does not contain any zero-syllable words. ...

  • Quantitative analysis of syllable properties in Croatian, Serbian, Russian, and Ukrainian

    Biljana Rujević, Marija Kaplar, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Jan Mačutek (2021)
    slogovi, distribucija rang-preciznost, slovenski jezici

  • Pre-failure deformation monitoring as rockfall prediction tool

    Miloš Marjanović, Biljana Abolmasov, Zoran Berisavljević, Marko Pejić, Petko Vranić (2021)
    General Engineering
    ... It surpasses the cross-sectional area (figure 5f) leaving no pre-failure thresholding example for the analysis, but it was evidently a wider event developed progressively, following a cluster of medium- to small-sized events of the preceding sequences. It partly encloses talus, but one medium-sized ...
    ... extended their analysis towards precursor indicators and increased the acquisition frequency after detecting a large part of one rock face with a massive tabular block slowly detaching. They managed to capture the acceleration stage of the rockslide and provided detailed analysis of pre-failure ...
    ... Šušić V 2013 Basic kinematic analysis of a rock slope using terrestrial 3D laser scanning on the M-22 highroad pilot site. Proc. of the EUROCK 2013, 21-26 September, Wroslaw, Poland, pp 679-683 [8] Marjanović M, Ðurić U, Abolmasov B and Bogdanović S 2014 Preliminary Analysis and Monitoring of the ...

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... first net zero industrial cluster by 2040 [101]. 6.2.8 The Teesside project Net Zero Teesside is a CCUS project, located in Teesside in the Northeast of England. It is set up to decarbonize clusters of companies by 2030, delivering the first zero-emission industrial cluster in the UK. The hub is ...
    ... clusters with sink clusters by trunk lines (backbone), in combination with satellite pipelines to link the individual sources and sinks within the cluster to the trunk line. This way the CO> demand and supply can be matched in a flexible way, like the existing European pipeline network for natural ...
    ... Измењено: 2024-03-12 09:52:04 Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs John Nyame Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Analysis Of the Process Of Carbon Capture Utilization And ...

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... performed using different combinations of several statistical methods such as the Pearson”"s correlation study, hierarchical cluster analysis (HCA), and principal component analysis (PCA), as well as by calculation of various biological factors such as biological concentration factor (BCF), mobility ...
    ... biomonitoring tools but also, we performed some additional analyses and comparisons between them (using one-way analysis of variance, the Pcarson”s correlation study, and hierarchical cluster analysis). Bioaccumulation rates of metals in roots were considered on the basis of calculated bio-concentration ...
    ... ... Dendrogram using Ward Linkage Rescaled Distance Cluster Combine 0 5 10 15 20 25 o [2,] ž o - ~ Y V [-] b) Dendrogram using Ward Linkage Rescaled Distance Cluster Combine 0 5 10 15 20 25 FJ 1 Figure 11. Hierarchical dendrograms for polluted sites based on the contents of ...

  • Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process

    Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković (2023)
    Due to the inability of conventional wastewater treatment procedures to remove organic pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach tap water. In terms of pharmaceutical pollutants, the scientific community focuses on -blockers due to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol (MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5, facile ...
    DFT analysis, metoprolol, nadolol, nanomaterial characterization, photocatalysis, pindolol, β-blocker
    ... 72, 650—54. [CrossRef] Liakos, D.; Guo, Y.; Neese, E. Comprehensive Benchmark Results for the Domain Based Local Pair Natural Orbital Coupled Cluster Method (DLPNO-CCSD(T)) for Closed- and Open-Shell Systems. J. Phys. Chem. 4 2020, 124, 90-100. [CrossRef] Neese, E.; Wennmohs, E;; Hansen, A.; Becker ...
    ... Saitow, M.; Neese, E Linear scaling, perturbative triples correction approximations for open-shell domain-based local pair natural orbital coupled cluster singles and doubles theory [DLPNO-CCSD(T0/T)]. J. Chem. Phys. 2020, 152, 024116. [CrossRef] Neese, E. Software update: The ORCA program system—Version ...
    ... efficiency of MET and NAD slightly increased (15% and 13%). Conversely, it reduced the PIN to the still satisfactory value of 40%. Computational analysis based on molecular and periodic density functional theory calculations was used to complement our experimental findings. Calculations of the averagje ...

  • Hidrogeohemijska valorizacija esencijalnih mikroelemenata mineralnih voda Srbije

    Jana S. Stojković (2013-09-25)
    Mineralne vode još od davnina privlače pažnju ljudi i to kako u pogledu istraživanja iproučavanja, tako i u pogledu njihovog iskorišćavanja. Naročito je važno poznavanjesadržaja mikroelemenata u njima, jer su to komponente njihovog hemijskog sastavakoje ih odvajaju od tzv. „običnih“ malomineralizovanih voda.U ovom radu proučavani su odabrani esencijalni mikroelementi (fluor, bor, litijum,kalijum, stroncijum i silicijum), u mineralnim vodama Srbije, pri čemu je analiziranopreko 130 uzoraka mineralnih voda iz različitih geoloških sredina, to jest hidrogeološkihrejona. Cilj ovog istraživanja bio je ...
    esencijalni mikroelementi, faktori migracije, zakonomernosti rasprostranjenja, hidrogeohemijski procesi, multivarijantna statistička analiza, mineralne vode Srbije
    ... methodology has been used during the field measurements and laboratory analysis, as well as for systematization and data analysis. Multivariate statistical analysis (factor analysis, Q-mode cluster analysis and R-mode cluster analysis) has been applied on the research results of physical and chemical ...
    ... razloga je u pomenutim slučajevima obavezna standardizacija podataka (Field 2000). Osnovni princip hijerarhijske klaster analize (Hierarchical Cluster Analysis, HCA) jeste da se, bez obzira na metod povezivanja uzoraka u klastere, uvek polazi od onoliko klastera koliko ima uzoraka, a završava ...
    ... samples, in addition to analyzing how these processes are influenced by lithological and mineralogical structure of aquifer. Using the cluster analysis the sample grouping of mineral waters has been done, on the basis of similarity of their physical and chemical characteristics. In this way ...

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... tectonic significance should be computed from the localitymean directions before tilt corrections (bold in Table 1). Five of them exhibit a tight cluster; locality 6 seems to be an outlier. While we have no direct evidence for the presence of hematite (carrying present overprint) in the white specimens ...
    ... present tiny hematite flakes can somewhat distort the component attached to magnetite. This could justify omitting the results departing from the cluster, a procedure that would not reallymodify the overall mean direction, but considerably improve its statis- tical parameters (Table 4). The characteristic ...
    ... site mean directions exhibits Fisherian distribution. Most of the sites mean directions are well-grouped, but some considerably depart from the cluster (Fig. 9). The overall mean paleomagnetic Fig. 7 Typical demagnetization curves of Oligocene dacitoandesites (sites 32, 29, 31) and granodiorites ...

  • Alpine tectonic evolution of the Northern Serbo-Macedonian subunit: inferences from kinematic and petrological investigations

    Bojan Kostić, Uroš Stojadinović, Nemanja Krstekanić, Marija Ružić, Aleksa Luković (2021)
    ... from the Vršac Mts such exhumation was hampered by the presence of rigid Moesianindenter. Tectonic exhumation of the Jastrebac Mts, together with a cluster of Serbo-Macedoniangneiss domes that emerge from the surrounding Neogene sediments in the western-central partof the Morava Valley Corridor, was induced ...

  • Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions

    Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák (2015)
    A series of nanostructuredfluorite-type Ce1–xYxO2–δ (0rxr0.35) solid solutions, prepared via highenergy milling of the CeO2/Y2O3mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For thefirst time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1–xYxO2–δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria ...
    Ceria, Yttrium, Solid solution, Mechanosynthesis, Oxygen vacancy, Nanocrystalline material

  • SrpELTeC: A Serbian Literary Corpus for Distant Reading

    Ranka Stanković, Cvetana Krstev, Duško Vitas (2024)
    U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...
    digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analytics