Претрага
939 items
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Polimorfne promene materije nastale mlevenjem minerala
Milan Petrov, Ljubiša Andrić, Milena Kostović, Vladimir Jovanović, Dragan Radulović, Dejan Todorović, Branislav Ivošević (2023)U radu su prikazani rezultati istraživanja iz oblasti usitnjavanja, sakupljani duži niz godina, u Institutu za tehnologiju nuklearnih i drugih mineralnih sirovina. Poznato je da se područja sa frekfencijama preko 3·1011 do 3·1014 Hz nalaze u elektromagnetnom spektru infracrvenog i daleko infracrvenog emitovanog ili apsorbovanog zračenja. U radu su prikazani rezultati kada se materijal i kugle u mlinu nalaze na jednoj od pomenutih frekfencija, što nam omogućava da pomoću Borovog uslova frekfencija pristupimo izračunavanju emitovanih i apsorbovanih molarnih energija ...Milan Petrov, Ljubiša Andrić, Milena Kostović, Vladimir Jovanović, Dragan Radulović, Dejan Todorović, Branislav Ivošević. "Polimorfne promene materije nastale mlevenjem minerala" in X Kolokvijum o pripremi mineralnih sirovina univerzitet u beogradu, Rudarsko-geološki fakultet, 08.12.2023., Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet (2023)
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Paleomagnetic study of Jurassic-Early Cretaceus sediments in the Danibicum of Eastern Serbia
... Gornjem Danubikumu koji se preko reke Dunav nastavlja dalje u Rumuniju, gde su ranije vršena paleomagnetska istraživana. Cilj ovog rada je da se utvrdi da li je istraživano područje učestvovalo u pomeranju regionalnog karaktera tokom ili posle vremenskog peroda obuhvaćenog starošću uzoraka. ...
... Izvršena je analiza linearnih segmenata krivi demagnetizacije, a na dobijene podatke primenjena je statistička analiza na nivou lokaliteta. Da bi se utvrdilo da li dobijena remanentna magnetizacija odražava starost pre ili posle tektonskih deformacija, primenjena je korekcija za tektoniku na nivou ...
... ije. Nakon evaluacije podataka utvrđeno je da su statistički parametri na nivou lokaliteta najčešće odlični. Podaci dobijeni ovim istraživanjem kao i podaci ranijih paleomagnetskih ispraživanja jurskih sedimenata u rumunskom delu Danibikuma ukazuju da je izdvojena remanentna magnetizacija post- ...Vesna Cvetkov, Emo Marton, Vesna Lesić, Dragana Tomić. "Paleomagnetic study of Jurassic-Early Cretaceus sediments in the Danibicum of Eastern Serbia" in I Kongres geologa u Bosni i Hercegovini sa međunarodnim učešćem, Udruženje geologa u Bosni i Hercegovini (2015)
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Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava
Boban S. Pavlović (2022)Aktuelnu energetsku tranziciju odlikuje ubrzanje procesa dekarbonizacije energetskih sistema, unapređenje energetske efikasnosti, razvoj čistijih tehnologija baziranih na obnovljivim izvorima energije i održivije korišćenje prirodnih resursa. Da bi se napravio ovako krupan zaokret u postojećim energetskim sistemima, osim promene postojećih tehnologija, potrebno je u planiranje energetske tranzicije uključiti i političke, sociološke, ekonomske i ekološke aspekte, a pre svega obrasce ponašanja i donošenja odluka krajnjih potrošača. Predmet istraživanja u disertaciji je energetska tranzicija sektora domaćinstva, preciznije tranzicija u grejanju domaćinstava, imajući u ...energetika, energetska tranzicija, energetsko planiranje, energetsko modeliranje, obnovljivi izvori energije, domaćinstva, ponašanje potrošačaBoban S. Pavlović. Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava, Beograd : [B. Pavlović], 2022
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Some models for determination of parameters of the soil oscillation law during blasting operations
... convenience measure of the obtained functional relationship for the given experimental data, the criterion “3S” was also used [10]. This criterion uses squares of differences between the obtained experimental data and the calculated ones for oscillation velocities of v. If those differences are one after ...
... [7], can be determined from conditions (initial condition) that, for R = R1, is v = v1. Parameters K and n will be determined by using experimental data of pairs (Ri, vi), i = 1, 2, ..., N, provided that the curve of the oscillation velocity of rock mass passes through the point M1(R1, v1). In that case ...
... for the oscillation velocity of rock mass in the monitored environment v “ v1 ¨ ´ R1 R ¯n . Thus, to determine the parameter n, all experimental data were taken into account. 2.2.3. Model 3—Determining the Parameters between Parameters K and n is Determined by Applying the Trapezoidal Formula for ...Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić. "Some models for determination of parameters of the soil oscillation law during blasting operations" in Energies, Basel, Switzerland : MDPI (2018). https://doi.org/10.3390/en9080617
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Production of morphological dictionaries of multi-word units using a multipurpose tool
The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...electronic dictionary, Serbian, morphology, inflection, multi-word units, noun phrases, query expansion... ments on two types of data. The first set of data consisted of nouns and adjectives already available in the existing DELAC dictionaries. The MWU lemmas for dictionary entries were (re)produced by LeXimir and then compared to the (correct) dictionary lemmas. The second set of data consisted of MWUs ...
... VeBrana (previously WS4QE), which is supported by the wsQueryExpand.asm web service. The web service accepts and generates data sets in XML form, which are further converted into data structures that can be used for different purposes (string, array, table, etc.). As examples of web service functions ...
... much smaller number of Fig. 7. Results obtained on the second set of test data (in%) cases (20%) the incorrect solution resulted from the system’s failure to cover a specific MWU structure. With the second set of test data (nouns collected from various sources) we proceeded as follows. First we removed ...Ranka Stanković, Ivan Obradović, Cvetana Krstev, Duško Vitas. "Production of morphological dictionaries of multi-word units using a multipurpose tool" in Proceedings of the Computational Linguistics-Applications Conference, October 2011, Jachranka, Poland, Jachranka, Poland : PTI - Polish Information Processing Society (2011)
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The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector
Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...... DATA COLLECTION SOCIO‐ECONOMIC APPLICABILITY (A), SECURITY OF SUPPLY (S), ENVIRONMENTAL ACCEPTABILITY € Expert analysis Numerical data DATA CLASSIFICATION FUZZY INFERENCE FUZZYFICATION RANKING INTEGRAL ANALYSIS INPUT DATA INPUT DATA INPUT FUZZY SET ...
... adequate form into the model of integral analysis. Such data are entered into the synthesis model by the fuzzy proposition procedure, where in the further process of fuzzification data are defined as input data to the fuzzy set. Ranking is performed at the same time. It can be performed by a number of different ...
... Development Scenarios During the procedure, data collection is performed, which can be statistical (based on calculation, software model result, projections, statistical processing, etc.) or based on expert analysis, i.e., attitude and experts. After that, the data are classified and entered in an adequate ...Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković. "The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12060908
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Održivo korišćenje mađarsko-srpskih međugraničnih vodnih tela
Dušan Polomčić, Zoran Stevanović, Saša Milanović, Stanko Sorajić, Bojan Hajdin, Željko Kljajić (2010)... reprezentativna vrednost u svakoj eliji diskretizacije (tabela 1). Tabela 1: Inicijalne vrednosti hidrogeoloških parametara Sloj Kh (m/dan) Kv (m/dan) Poroznost (-) Specif. izdašnost izdani (-) Specif. uskladištenje (1/m) 1 4 0,004 0,1 0,037 0,003 2 2 0,004 0,2 0,29 6,35⋅10-5 ...
... diskretizacije (tabela 1). Tabela 1: Inicijalne vrednosti hidrogeoloSkih parametara Specif. Specif. Sloj Kh Kv Poroznost izdaSnost | uskladi8tenje (m/dan) | (m/dan) ) | igdani() | (A/m) 4 0,004 | 0,1 0,037 0,003 2 0,004 | 0,2 0,29 6,35-10° 0,015 | 0,0002] 0,1 0,037 0,003 10 0,4 0,2 0,29 6,35-10° 0,0005| 0 ...
... U tabeli 2 dat je prikaz trenutne potrošnje podzemnih voda, kao i neke karakteristike anketiranih vodovoda. 4. Etaloniranje modela Etaloniranje modela je sprovedeno u nestacionarnim uslovima strujanja, sa vremenskim korakom od jednog meseca za vremenski period od godinu dana. Jedan broj ...Dušan Polomčić, Zoran Stevanović, Saša Milanović, Stanko Sorajić, Bojan Hajdin, Željko Kljajić. "Održivo korišćenje mađarsko-srpskih međugraničnih vodnih tela" in Vodoprivreda 42 no. 04-Jun, Beograd : Jugoslovensko društvo za odvodnjavanje i navodnjavanje (2010): 223-235
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Zaštita od miniranja
Suzana Lutovac, Miloš Gligorić (2024)Suzana Lutovac, Miloš Gligorić. Zaštita od miniranja, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet, 2024
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Optimising in electrical energy consumption in mining plants
Snežana Aleksandrović, Vesna Damnjanović, Ilija Jeftenić. "Optimising in electrical energy consumption in mining plants" in 17th International Symposium INFOTEH-JAHORINA 2018, Istočno Sarajevo : Elektrotehnički fakultet, Univerzitet u Istočnom Sarajevu (2018)
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Машине и помоћни радови на површинским коповима
Драган Игњатовић, Томислав Шубарановић, Стеван Ђенадић. Машине и помоћни радови на површинским коповима, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2021
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Praktikum iz inženjerske geologije
Miloš Marjanović, Biljana Abolmasov, Uroš Đurić, Jelka Krušić. Praktikum iz inženjerske geologije, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2020
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Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine
... Thus, to determine the parameter n, all experimental data were taken into account. 3. DEFINING OF STATISTICAL CRITERIA To evaluate the degree (Ivanović, 1973) of correlation between recorded (measured) and calculated data in this paper we have used the coefficient of linear 14 ...
... convenience measure of the obtained functional relationship for the given experimental data, the criterion "3S" was also used (Vukadinović, 1970). This criterion uses squares of differences between the obtained experimenal data and the calculated ones for oscillation velocities of v. If those diffrences are ...
... Za određivanje parametara u jednačini Sadovskog, pored uobičajene metode najmanjih kvadrata primenjen je još jedan model. Pri tom je konstatovano da se oba modela mogu koristiti za izračunavanje brzine oscilovanja stenske mase. Ključne reči: radna sredina, miniranje, seizmičko dejstvo, brzina ...Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine" in Underground Mining Engineering, Belgrade : University of Belgrade, Faculty of Mining and Geology (2015). https://doi.org/10.5937/podrad1526009L
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Quantitative landslide risk assessment in the city of Tuzla
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 – ...... 5 m resolution raster. All other raster data had the same 5 m resolution. Landslide susceptibility required several static conditioning factors used as proxies for the landsliding process. These included geological, geomorphologic and environmental data. These were subsequently supplemented with ...
... 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 – inventorying, estimating zones of their spatial probability exceedance, appending zones of their increased temporal ...
... et al., 2019): interpolating annual rainfall distribution for specified period (baseline, or specific future projections) from the point-based data (weather stations); normalizing obtained rainfall map to 0-1 range; overlapping previously completed susceptibility model and normalized rainfall ...Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović. "Quantitative landslide risk assessment in the city of Tuzla" in SCG-Xiii International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics and Geotechnical Engineering (2021)
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Facies analyses, biostratigraphy and radiometric dating of the Lower-Middle Miocene succession near Zajecar (Dacian basin, eastern Serbia)
Ljupko Rundić, Nebojsa Vasić, Miodrag Banješević, Dejan Prelević, Violeta Gajić, Bojan Kostić, Jelena Stefanović (2020)Седиментна сукцесија између доњег и средњег миоцена и складан тј. дискордантан однос између језерско-континенталних наслага (нпр. DLS, SLS) и баденских морских седимената представља једну од занимљивих тема. У овом раду смо проучавали пет истражних бушотина (источна Србија) и анализирали главни фацијални образац, биостратиграфске карактеристике миоценске сукцесије и применили U-Pb радиометријско датирање вулканских туфова интерстратификованих у седиментној серији са слојевима угља (бушотина NRKR-17002). Добиjeна је конкордија старост од 16,9 ± 0,2 милиона година за сва анализирана зрнца циркона без наследних ...Ljupko Rundić, Nebojsa Vasić, Miodrag Banješević, Dejan Prelević, Violeta Gajić, Bojan Kostić, Jelena Stefanović. "Facies analyses, biostratigraphy and radiometric dating of the Lower-Middle Miocene succession near Zajecar (Dacian basin, eastern Serbia)" in Annales geologiques de la Peninsule balkanique, National Library of Serbia (2020). https://doi.org/10.2298/GABP1902013R
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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.... full data can be found at rgf.rs/projekti/bil/sk/results/KakoSeKalioCelik_2019 _01_14.xlsx) can be modelled by one of these distributions as well. Table 2. Rank-frequency distribution of syllables in Serbian rank frequency syllable 1 10103 o 2 6970 je 3 5778 u 4 5291 na 5 5248 da 6 4827 ...
... normalization constant). As several other Poisson-like distributions also fit the data very well, we postpone any attempts to formulate conclusions that could be deduced from the model and parameter values until data for more languages are available. Stretching the analogy between words and syllables ...
... probably by OCR deficiencies) were corrected or deleted (e.g. abbreviations). 4. Results The syllabified text provides a valuable source of data (word forms: 114348 tokens, 21378 types; syllables: 239219 tokens, 2417 types) which can be used to investigate many properties of syllables. In this ...Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová. "Frequency and Length of Syllables in Serbian" in Glottometrics (2019)
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The shear strength evaluation of rough and infilled joints and its indications for stability of rock cutting in schist rock mass
Construction of E75 highway section through Grdelica gorge was one of the most demanding projects realized in recent Serbian history. The alignment approximately 25 km long consists of several tens of bridges, two tunnels, three galleries and cuts with total length of 6 km. The alignment passes through highly anisotropic Palaeozoic schist rock formation of different weathering grades. This study focuses on shear strength properties of discontinuities, which are found to be the critical feature contributing to the occurrence ...Dušan Berisavljević, Zoran Berisavljević, Svetlana Melentijević. "The shear strength evaluation of rough and infilled joints and its indications for stability of rock cutting in schist rock mass" in Bulletin of engineering geology and the environment, Springer (2022). https://doi.org/10.1007/s10064-022-02580-8
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Vodosnabdevanje podzemnim vodama u Srbiji-stanje i perspektive
Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Petar Papić, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić (2011)... koji okružuje. Zona II obuhvata prostor sa kog voda dotiče do vodozahvatnog objekta za najmanje 50 dana, dok se Zona III određuje prema vremenu putovanja od 200 dana za koje se procenjuje da je dovoljno da se prirodnim procesima prečišćavanja vode smanje koncentracije zagađivača (slika 23). 4. PODZEMNE ...
... koji okruzZuje. Zona II obuhvata prostor sa kog voda doti¢e do vodozahvatnog objekta za najmanje 50 dana, dok se Zona III odreduje prema vremenu putovanja od 200 dana za koje se procenjuje da je dovoljno da se prirodnim procesima preciscavanja vode smanje koncentracije zagadivaca (slika 23). 67 68 ...
... >aširanih voda u Evropi de'nisana, kod nas se beleži u poslednjih nekoliko godina značajan rast potrošnje, što znači da se tržište još uvek nije stabilizovalo. Ipak, treba reći da je potrošnja znatno niža u odnosu na zemlje Evropske unije. U Srbiji postoji oko 40 izvorišta podzemnih voda za >aširanje ...Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Petar Papić, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić. "Vodosnabdevanje podzemnim vodama u Srbiji-stanje i perspektive" in Naših 40 godina, Beograd : Rudarsko-geološki fakultet (2011): 49-77
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Да ли су сви калкоалкални интраофилолитски гранитоиди источне Вардарске зоне јурске старости?
Шарић Кристина, Цветковић Владица, von Quadt, Albrecht, Peytcheva Irena, Малбашић Јована. "Да ли су сви калкоалкални интраофилолитски гранитоиди источне Вардарске зоне јурске старости?" in Српски геолошки конгрес, Врњачка Бања, 17‐20. мај 2018 no. 1, Врњачка Бања:Српско геолошко друштво (2018): 98-101
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Multiple-Criteria Decision-Making in Mine Development Planning
Sanja Bajić (2023)The Borska Reka ore deposit is an experimental location where developed methodologies have been applied. It is the largest ore body within the Bor mining complex, which has been the subject of numerous studies and analyses for more than three decades. The paper focuses on the application of FAHP and the VIKOR method to address ranking of alternatives and select the optimal mining method by means of fuzzy multicriteria optimization.Sanja Bajić. "Multiple-Criteria Decision-Making in Mine Development Planning" in Proceedings of the 5th International Underground Excavations Symposium, 5-6-7 June 2023, Istanbul, Topkapi : Dinç Ofset Mat. Rek. San. ve Tic. Ltd. Şti. (2023)
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An Approach to Efficient Processing of Multi-Word Units
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 ...... of the first evaluation the results varied depending on the type of data used: for the first data set of general terms the system produced 84.97% of correct results (96.14% if we include partly correct solutions), for the second data set of specific terms 78.01% of correct results (88.42% with partly ...
... VebRanka (previously WS4QE), which is supported by the wsQueryExpand.asm web service. The web service accepts and generates data sets in XML format, which are further converted into data structures that can be used for different purposes (string, array, table, etc.). As examples of web service functions ...
... strategy, involving three data sets. The first set consisted of nouns and adjec- tives already available in the existing DELAC dictionaries. The MWU lemmas for dictionary entries were (re)produced by LeXimir and then compared to the (correct) dictionary lemmas. The second set of data consisted of common ...Cvetana Krstev, Ivan Obradović, Ranka Stanković, Duško Vitas. "An Approach to Efficient Processing of Multi-Word Units" in Computational Linguistics - Applications, Studies in Computational Intelligence 458 no. 458, Berlin Heidelberg : Springer-Verlag (2013): 109-129. https://doi.org/10.1007/978-3-642-34399-5_6