Претрага
574 items
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Laboratory testing of fly ash
Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction... aluminates (CAH) and silicates (CSH) of calcium are formed, which are hardly soluble in water. Ca(OH)2 + SiO2 + nH2O=CaO SiO2 (n+1) H2O = (CSH) Ca(OH)2+Al2O3+nH2O=CaO Al2O3 (n+1) H2O = (CAH) Table 5 Classification of pozzolanic materials [15] Class Tensile strength / kPa Compressive strength / ...
... classify any fly ash are given in the Tab. 6. Table 6 Classification of fly ash to ASTM C 618 [17] Characteristics Class Natural pozzolan F C N SiO2+Al2O3+Fe2O3 min (%) 70 50 70 SO3 max (%) 5 5 4 Humidity max (%) 3 3 3 Loss on ignition max (%) 6 6 10 Class F of fly ash is silicate, or ...
... calcium hydroxide and forms a product which helps it to be harder. Class C with pozzolanic properties also has a feature of selfhardening. Class N is crude or calcified natural pozzolan. Two series of Series 1 (S1) and Series 2 (S2) samples were taken for testing, weighing about 20g per sample ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Laboratory testing of fly ash" in Tehnički vijesnik (2016). https://doi.org/10.17559/TV-20150317171035
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A WebGIS Decision Support System for Management of Abandoned Mines
Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)... represents the consistency index and RI the random consistency index. The consistency index is calculated as: CI = (λmax ´ n)/n ´ 1, where λmax represents the largest matrix eigenvalue, and n the number of factors [17]. The random consistency index RI is a table value empirically defined by Sati, which depends ...
... Services Directory. Available online: http://services.arcgisonline.com (accessed on 11 April 2015). 11. Stanković, R.; Vulović, N.; Tošović, R.; Pešić-Georgiadis, M.; Lilić, N.; Obradović, I. Webgis Decision Support System for Management of Abandoned Mines. In Proceedings of the 5th International Symposium ...Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis. "A WebGIS Decision Support System for Management of Abandoned Mines" in Energies 7 no. 9 (2016): 567. https://doi.org/10.3390/en9070567
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Old or New, We Repair, Adjust and Alter (Texts)
Cvetana Krstev, Ranka Stanković (2020)U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja... ‘п’ → ‘и’ → ‘н’ → ‘п’). Example: if ппво occurs in a text as an unknown word, then ‘п’ → ‘и’ is applied twice which results in a string *ппво*_*ипво*_*пиво*_ииво*, after that ‘и’ → ‘н’ is applied resulting in *ппво*_*ипво*_*пиво*_*ииво* _*нпво*_*пнво*_*ниво*_*инво*_*ииво*. After that rule ‘н’ → ‘п’ is not ...
... сиежии three letters ‘и’ occur, first and second are incorrect and should both be replaced by ‘н’ yielding a valid word снежни – snežni ‘snowy’. Just a few general FSTs (bottom of Figure 2) were developed for a few types of corrections – one or two character replacement, in one or both directions. ...
... the original, input word ($1$Y) and the corrected, output word ($1$X).4 The application of these FSTs always leaves in a processed texts the original word to which a candidate is added. Also, FSTs for each replacement pair are iterated which enables the same corrections in one word: for instance, in сиежии ...Cvetana Krstev, Ranka Stanković. "Old or New, We Repair, Adjust and Alter (Texts)" in Infotheca, Faculty of Philology, University of Belgrade (2020). https://doi.org/10.18485/infotheca.2019.19.2.3
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Petrographical and organic geochemical study of the subbituminous coal from the Dubrava field, Aleksinac basin (Serbia)
Željana Sekulić, Ksenija Stojanović, Achim Bechtel, Reinhard Sachsenhofer, Miomir Petrović, Ivan Kojić, Dragana Životić (2019)... abundant hopanoids, belonging to 13(18)-neohopene series, suggest in addition to ferns, contribution of chemoautotrophic bacteria. Content of total n-alkanes increases through the seam, Which is associated with notable decrease of content of short-chain (С15-Сг0) and increase of long-chain (Cz6-Ca3) ...Željana Sekulić, Ksenija Stojanović, Achim Bechtel, Reinhard Sachsenhofer, Miomir Petrović, Ivan Kojić, Dragana Životić. "Petrographical and organic geochemical study of the subbituminous coal from the Dubrava field, Aleksinac basin (Serbia)" in 71st Annual Meeting of the International Commitee for Coal and Organic Petrology (ICCP), The Hague, Netherlands, 15. – 21. September 2019, International Commitee for Coal and Organic Petrology (ICCP) (2019)
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Automatic construction of a morphological dictionary of multi-word units
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, multiwordn units, noun phrases, query expansion... CflxGroup="AXN"><Word ID="1" POS="A" Flex="true" Case="1" Anim="$a" Gen="$g"/> <Word ID="2" POS="N" Flex="true" Case="1" Anim="=$a" Gen="=$g"/> <Word ID="1" Num="s" Cond="$PRE"/> <Word ID="2" Num="s"/> ...
...<Word ID="1" Case="1" Num="p"/> <Word ID="2" Case="1" Num="p"/> <Word ID="1" Case="1" Num="s"/> <Word ID="2" Case="1" Num="s" SinSem="+VN,+Coll,+HumColl"/> ...
... morphological dictionary of multi-word units Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Automatic construction of a morphological dictionary of multi-word units | Cvetana Krstev, Ranka ...Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić. "Automatic construction of a morphological dictionary of multi-word units" in Lecture Notes in Computer Science 6233, Advances in Natural Language Processing, Proceedings of the 7thInternational Conference on NLP, IceTAL 2010, Reykjavik, Iceland, August 2010, Springer (2010): 226-237. https://doi.org/10.1007/978-3-642-14770-8_26
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From DELA Based Dictionary to Leximirka Lexical Database
Biljana Lazić, Mihailo Škorić (2020)In this paper, we will present an approach in transforming Serbian language Morphological dictionaries from a DELA text format to a lexical database dubbed Leximirka. Considering the benefits of storing data within a database when compared to storing them in textual documents, we will outline some of the functionality that the database has made possible. We will also show how hand-made rules that use category labels lexical entries are marked with can be used to link lexical entries. ...... and multiword units. The basic components of the simple word morphological vocabulary system are DELAS (fr. DELA de formes simple) and DELAF (fr. DELA de formes Fléchies) (Courtois and Silberztein, 1990). A single DELAS entry consists of a word lemma and its inflective, semantic, and syntactic properties ...
... for its production consists of automatically generated entries representing all inflectional forms of a DELAS dictionary. It consists of a word form, its lemma, word type designation, semantic mark- ers and a set of grammar categories. Here is an example of one line from a DELAF dictionary: bibliotekarom ...
... predefined queries that retrieve a word searched for in a context. This predefined query could replace “Plain lemma” in the drop-down menu. For example, if a lexical entry describes a noun, the predefined query “AN” retrieves occurrences (concordances) in which the word described by an entry follows an ...Biljana Lazić, Mihailo Škorić. "From DELA Based Dictionary to Leximirka Lexical Database" in Infotheca, Faculty of Philology, University of Belgrade (2020). https://doi.org/10.18485/infotheca.2019.19.2.4
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Available technological procedures for capturing CO2 in the industrial and power generation sectors
Climate change is a major environmental issue caused by anthropogenic emissions of greenhouse gases. Capturing CO2 and storing it in suitable geological formations is one of the main technological solutions that can provide mitigation of CO2 emission into the atmosphere. Capturing CO2 represents the first phase in process of carbon capture and storage, and includes the application of various technologies for the separation of CO2 produced in the energy and industrial sectors. There are four main systems for capturing ...... commercial physical solvents: Selexol (dimethylether of polyethylene glycol), Resticol process (methanol), Fluor process (propylene carbonate), Purisol (N-methyl pyrrolidone) and Morphysorb process (morpholine) [20-22]. The most important advantage of physical absorption process is relatively low capital ...
... Absorption of CO2 Capture: A Review. Advanced Materials Research 2014, 917, 134-143, doi: 10.4028/www.scientific.net/AMR.917.134. 21. Badiei, M.; Asim, N.; Yarmo, M.A.; Jahim, J.M.D.; & Sopian, K. OVERVIEW OF CARBON DIOXIDE SEPARATION TECHNOLOGY, Proceedings of the IA STED International Conference, Power ...
... _Review_of_CO_2_Capture_by_Absorpt ion_and_Adsorption (accessed on 05 June 2021). 23. Arachchige, U.; Ekanayaka, S.; Ruvishani, L.S.; & Jinasoma, N. Review of Post Combustion CO2 Capture Technologies. JOURNAL OF RESEARCH TECHNOLOGY AND ENGINEERING 2020, 1 (4), 8-20. 24. Ben-Mansour, R.; Habib ...Lola Tomić, Vesna Karović Maričić, Dušan Danilović, Branko Leković, Miroslav Crnogorac. "Available technological procedures for capturing CO2 in the industrial and power generation sectors" in 8th International Conference Mining and Environmental Protection, 22 – 25th September 2021, Serbia, Univerzitet u Beogradu, Rudarsko-geološki fakultet (2021)
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Pre-failure deformation monitoring as rockfall prediction tool
... development of Serbia, TR36009. References [1] Erismann T and Abele G 2001 Dynamics of Rockslides and Rockfalls (Springer: Berlin) p 316 [2] Rosser N, Lim M, Petley D, Dunning S and Allison R 2007 Patterns of precursory rockfall prior to slope failure. Jour. of Geoph. res. 112 F04014. [3] Abellán ...
... Identifying rock slope failure precursors using LiDAR for transportation corridor hazard management. Eng. Geol. 195 93–103 [5] De Vilder S J, Rosser N J and Brain M J 2017 Forensic analysis of rockfall scars. Geomorphology 295 202–214 [6] Janeras M, Jara J A, Royán M J, Vilaplana J M, Aguasca A, ...
... near Ljig in Serbia. Proc. of the 3rd Reg. Symp. Landslides in the Adriatic Balkan Region. 11-13 October, Slovenia, Ljubljana, pp 83-88 [11] Brodu N and Lague D 2012 3D Terrestrial LiDAR data classification of complex natural scenes using a multi-scale dimensionality criterion: applications in g ...Miloš Marjanović, Biljana Abolmasov, Zoran Berisavljević, Marko Pejić, Petko Vranić. "Pre-failure deformation monitoring as rockfall prediction tool" in IOP Conference Series: Earth and Environmental Science, IOP Publishing (2021). https://doi.org/10.1088/1755-1315/833/1/012197
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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 – ...... P., da Silva, F. P., Andersen, P., Pilz, J., Chalov, S. R., Malet, J-P., Jemec Auflič, M., Andres, N., Poyiadji, E., Lamas, P. C., Zhang, W., Peshevski, I., Pétursson, H. G., Kurt, T., Dobrev, N., García-Davalillo, J. C., Halkia, M., Ferri, S., Gaprindashvili, G., Engström, J., Keellings, D. (2016) ...
... Sumant, E. A., Suchitra, S. P. (2013) “Landslide hazard assessment: recent trends and techniques”. Springer Plus 2, 523. van Westen, C. J., Rengers, N., Soeters, R. (2003) “Use of Geomorphological Information in Indirect Landslide Susceptibility Assessment”. Natural Hazards 30(3): 399–419. ...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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Distribution of major and trace elements in the Kovin lignite (Serbia)
Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...... MITROVIĆ, D., ĐOKOVIĆ, N., ŽIVOTIĆ, D., BECHTEL, A., ŠAJNOVIĆ, A. & STOJANOVIĆ, K. (2016): Petrographical and organic geochemical study of the Kovin lignite deposit, Serbia.– International Journal of Coal Geology, 168, 80–107. doi: 10.1016/j.coal.2016.07.008 MITROVIĆ, D., ĐOKOVIĆ, N., ŽIVOTIĆ, D., BECHTEL ...
... 39.46 6.85 12.10–50.26 36.23 10.79 9.67–46.71 30.88 14.19 Q daf g (MJ/kg) 21.00–28.30 24.29 1.82 16.90–27.80 23.48 3.09 15.70–26.30 23.00 3.71 Qdaf n (MJ/kg) 20.10–27.20 23.26 1.82 16.30–26.70 22.42 3.02 14.30–25.30 22.02 3.75 Cdaf (wt.%) 56.48–73.24 64.78 3.92 52.25–74.02 64.40 4.73 55.23–70.45 64 ...
... total sulphur content, dry basis wt.%; Vdb – volatile mat- ter, dry basis wt.%; Q daf g – gross calorific value, dry, ash-free basis, MJ/kg; Q daf n – net calorific value, dry, ash-free basis, MJ/kg; Cdaf – carbon content, dry, ash-free basis, %; Hdaf – hidrogen content, dry, ash-free basis, %; Ndaf ...Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović. "Distribution of major and trace elements in the Kovin lignite (Serbia)" in Geologia Croatica, Croatian Geological Survey (2019). https://doi.org/10.4154/gc.2019.06
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P-T analiza uglja RB Kolubara
Rada Vitomir (2024)Rudarski basen Kolubara predstavlja jedno od najvažnijih ležišta lignita u Republici Srbiji i ključni je faktor u snabdevanju zemlje energijom. Kvalitet uglja iz ovog basena direktno utiče na efikasnost termoelektrana i zadovoljenje energetskih potreba. U ovom radu, opisan je značaj tehničke i elementarne analiza uglja kako bi se utvrdili fizičko-hemijski parametri uglja iz Rudarskog basena Kolubara. U drugom delu rada dat je opis P-T analize uglja i njen značaj za ocenu mogućnosti čišćenja uglja. Takođe, dati su i rezultati ...... teške tečnosti, podrobno ocedi i na kraju stavlja u zaseban sud gde se dobro ispira vodom. Ako se analiza vrši na opisan način, dobija se n + 1 frakcija gde Je n broj gustina na kojima je vršeno raslojavanje. U stvari je cilj analize da se dobiju tačne količine frakcija koje su raslojene u različitim ...
... fakultet Beograd. 16.Pandey, V. C., Singh, J. S., Singh, R. P., Singh, N., & Yunus, M. (2011). Arsenic hazards in coal fly ash and its fate in Indian scenario. Resources, Conservation and Recycling, 55(9-10), 819-835. 17.Rasulić, N., Delić, D., Kuzmanović, S., Jošić, D., Kuzmanović, Đ., Anđelović, ...
... efikasnost. SADRŽAJ BLG p AAAAAA ARAAA AAARAAA 1 2. TEORIJSKI OKVIR ... aanaaa a a aaa a aaaai ag aae 2 2.1. Osnovni pojmovi o uglju ......c.aaaaa a n a aaaaa a ii aaiaiaae 2 2.2. Karakteristike i klasifikacija uglja.... 2.3. Elementarna i tehnička analiza uglja..............aaaaaanaaaaaanaaanaadaanaot ...Rada Vitomir. P-T analiza uglja RB Kolubara, 2024
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Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept
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 ...Uroš Đurić, Miloš Marjanović, Zoran Radić, Biljana Abolmasov. " Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept" in Engineering Geology , Elsevier (2019). https://doi.org/10.1016/j.enggeo.2019.05.007
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Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics
Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić. "Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics" in Minerals, MDPI AG (2024). https://doi.org/10.3390/min14050511
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Pokazatelji recentne tektonske aktivnosti u speleološkim objektima Dževrinske grede (istočna Srbija)
Ana Mladenović, Jelena Ćalić (2022)Sistem Timočkog raseda predstavljen je sistemom desnih transkurentnih raseda generalnog pružanja sever – jug, koji su bili aktivni u periodu oligocena i miocena u okviru Karpato-balkanskog orogena. Početak njihove aktivnosti vezuje se za rotaciju tektonskih jedinica Karpato-balkanida (Dacia Mega Unit) oko rigidne Mezijske jedinice. Aktivnost ovih transkurentnih raseda je akomodirala ovu rotaciju, pa se smatra da je kumulativno kretanje duž Timočkog raseda tokom perioda njegove aktivnosti bilo do 100 km. Usled kompleksnih tektonskih rotacija, rasedi ovog sistema doveli su ...Ana Mladenović, Jelena Ćalić. "Pokazatelji recentne tektonske aktivnosti u speleološkim objektima Dževrinske grede (istočna Srbija)" in 18. Kongres geologa Srbije "Geologija rešava probleme", Srpsko geološko društvo (2022)
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Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike
... parafin, (C5) voda A B C O B L IC I E N E R G IJ E I I Z V O R E N E R G IJ E A U T O M A T S K A R E G U L A C IJ A I D A L JI N S K O U P R A V L JA N JE R E M O N T А1 А2 А3 D U B IN A B1 P R O IZ V O D N JA B2 T E M P E R A T U R A B3 ...
... mogućnosti za različite nacionalne ekonomije Pu šk e Puter A B C D K a p it a ln e i n v e st ic ij e Tekuća potrošnja D Nacionalna ekonomija 1 Nacionalna ekonomija 2 N acionalna ekonom ija 3 N acionalna ekonom ija 4 B A C Preduzetništvo, inženjerstvo i menadžment ...
... novca kao instrumenta prometa i novca kao kapitala. Za razliku od novca kao pukog instrumenta u prometu, novac kao kapital je baziran na ciklusu N R N...., odnosno N1 R N2...., u kojem se nastoji da N1 bude veće od N2. Ovakvo kretanje novca kao kapitala dovodi da zaključka da je ono zapravo ...Мирослав Црногорац, Душан Даниловић, Лола Томић. "Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike" in IX Naučno stručni skup Preduzetništvo, inženjerstvo i menadžment Zrenjanin, 24.10.2020. god., Visoka tehnička škola strukovnih studija u Zrenjaninu (2020)
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Mikroorganizmi - biohidrogeološki indikatori odabranih pojava mineralnih voda Srbije
Vladimir Šaraba (2021)Sa namerom definisanja hidrogeološke uloge i značaja mikrobiološkog diverziteta odabranih pojava mineralnih voda Srbije, primenom sistema biodetektora, dokazano je prisustvo gvožđevitih, sulfato-redukujućih, sluz-produkujućih, heterotrofnih aerobnih i denitrifikacionih bakterija, na osnovu čega je proračunat rizik od razvoja procesa biokorozije i biohemijske inkrustacije, te zdravstveni rizik. Uz procenu rizika, izvedene su analize skenirajuće elektronske mikroskopije biofilmova i hidrogeohemijsko modeliranje, te makroskopska, otpička i difrakciona ispitivanja naslaga inkrustacije, dok je fizičko-hemijskim analizama utvrđena vrednost ukupne mineralizacije iznad 1 g/L, kao i povišeni ...biohidrogeologija, SEM analize, makroskopska i optička ispitivanja, rendgenska difrakcija praha, hidrogeohemijsko modeliranje, BART analize, metabarkoding analize mikrobioma, fizičko-hemijske analize, starenje bunara (biokorozija, biohemijska inkrustacija i biozarastanje), zdravstveni rizik... Pavlinić Prokurica, I., Bevardi, M., Marušić, N., Vidaček, S., Kolarić Kravar, S., & Medić, H. (2010). Nitriti i nitrati kao prekursori N-nitrozamina u paštetama u konzervi. Meso, 12 (6), 322-332. Pavlović, Z., Marković, B., Atin, B., Dolić, D., Gagić, N., Marković, O., Dimitrijević, M., & Vuković, ...
... quadrata, H. californiae, H. sinaiiensis, H. aidinensis 2 – 5 M NaCl Halobaculum H. gomorrense 1,5 – 2,5 M NaCl Natronococcus N. occultus 1,4 – 5,2 M NaCl Natronomonas N. pharaonis 5 M NaCl U odnosu na način života u podzemnim vodama, mikroorganizmi se dele na planktonske i bentosne organizme ...
... sa identifikovanom vrstom N. mobilis, određen je u okviru familije Nitrosomonadaceae i učestvuje u oksidaciji amonijum jona do nitrita (DBI, 2004). Bakterije roda Nitrosomonas predstavljaju glavne zajednice u bioreaktorima za prečišćavanje otpadnih voda, odnosno vrsta N. mobilis (Thandar et al., 2016) ...Vladimir Šaraba. Mikroorganizmi - biohidrogeološki indikatori odabranih pojava mineralnih voda Srbije, Beograd : [V. Šaraba], 2021
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Fuzzy Model for Risk Assessment of Machinery Failures
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 ...... due to failures in the subsystem “construction”. Subsystem Failure of Element Number of Failures Time to Failure (h) Time to Repair (h) C o n st ru ct io n Belt construction bending 2 553, 1792 3, 7 Belt construction fracture 6 90, 192, 230, 295, 305, 1276 2, 4, 4, 5, 6, 8 Sieve plate supporter ...
... stage of the risk assessment model is to determine the risk level of failure for the kth component in the technical system, where k = 1, 2, . . . , n. The level of risk of failure of one component of a mining machine is determined based on the risk indicator for the kth component. The risk indicators ...
... to failures in the subsystem “diesel engine”. Subsystem Failure of Element Number of Failures Time to Failure (h) Time to Repair (h) D ie se l E n g in e Alternator 4 237, 739, 942, 2569 2.5, 4, 6.5, 8.2 Coolant hose leak 5 270, 410, 1487, 1736, 2056 1, 1.2, 3.5, 4.5, 6.8, Cooling fan blades ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy Model for Risk Assessment of Machinery Failures" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12040525
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Tektonska evolucija severoistočnih Dinarida
... units. The obtained results indicate the existence of three main deformation phases. The oldest, pre-Alpine deformation phase is associated with N-S contraction during the Late Paleozoic Variscan orogeny. The ductile structures that accommodate this pre-Alpine deformation are represented by S1 ...Nikola Ranđelović, Branislav Trivić, Nemanja Krstekanić, Bojan Kostić, Uroš Stojadinović. "Tektonska evolucija severoistočnih Dinarida" in 18. Kongres geologa Srbije "Geologija rešava probleme", Divčibare, 01-04 jun 2022., Srpsko geološko društvo (2022)
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Model za optimizaciju graničnog saržaja metala u rudi u funkciji dugoročnog planiranja površinskih kopova
Daniel P. Kržanović (2016-06-14)Optimizacija graničnog sadržaja metala u rudi jedan je od osnovnih koraka u planiranju i dizajniranju površinskih kopova i ima za cilj postizanje maksimalne neto sadašnje vrednosti (NPV). Iz tog razloga, optimizacija graničnog sadržaja i danas je predmet mnogih istraživanja u rudarskoj nauci, sa ciljem rešavanja praktičnih problema u eksploataciji ležišta.Dugoročno planiranje eksploatacije na površinskim kopovima podrazumeva sagledavanje svih relevantih parametara i faktora (geologije rudnog ležišta, tehnologije proizvodnog procesa, kapaciteta otkopavanja i prerade, troškova, cena metala, iskorišćenja i dr) kako ...površinski kop, dugoročno planiranje, optimizacija graničnog sadržaja, maksimizacija neto sadašnje vrednosti (NPV).... T - maksimalan broj perioda planiranja N - ukupan broj blokova koji se otkopava (u konačnoj konturi kopa ili u nekoj fazi otkopavanja) - NPV koja se generiše otkopavanjem bloka n u periodu t - binarna varijabla, koja je jednaka 1 ako se blok n otkopava u periodu t, u suprotnom je 0. ...
... (3.4) gde je: zIU - procenjena vrednost di ...dn - udaljenost lokacija 1...n od mesta procene ziu p - eksponent udaljenosti zi ...zn - merene vrednosti na lokacijama 1...n. Uticaj svake tačke obrnuto je proporcionalan njenoj udaljenosti od lokacije na kojoj se procenjuje ...
... interpolacionih metoda za isti ulazni skup merenih vrednosti. 41 Postupak metode je sledeći. U nekom skupu koji sadrži n podataka postupak se ponovi tačno n puta. U svakom koraku bira se jedna (uvek druga) merena vrednost, stavlja se izvan skupa podataka, upoređuje se razlika izvorne i procenjene ...Daniel P. Kržanović. "Model za optimizaciju graničnog saržaja metala u rudi u funkciji dugoročnog planiranja površinskih kopova" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-06-14)
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Kontaktni metamorfizam gornjokrednih sedimentnih stena Rudnika
Kostić N. Bojan (2021)Kontaktni metamorfizam gornjokrednih sedimentnih stena na planini Rudnik ispitivan je na uzorcima iz pet bušotina. Definisano je šest varijeteta krednih stena (protolita) koji čine dve litološke jedinice izgrađene od klastičnog, karbonatnog i klastično-karbonatnog materijala. Vulkanskom aktivnosti na Rudniku formirana su vulkanska tela koja se utiskuju duž slojevitosti sedimentnih stena, a neka ih presecaju u vidu dajkova. Starost ovog vulkanskog događaja određena je na 23.9 miliona godina. Ovaj miocenski vulkanizam doveo je do kontaktno metamorfnih promena sedimentnih stena i obrazovanja skarnova ...... Kontaktni metamorfizam gornjokrednih sedimentnih stena Rudnika Kostić N. Bojan Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Kontaktni metamorfizam gornjokrednih sedimentnih stena Rudnika | Kostić N. Bojan | | 2021 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005070 ...
... Bojan N. Kostić KONTAKTNI METAMORFIZAM GORNJOKREDNIH SEDIMENTNIH STENA RUDNIKA doktorska disertacija Beograd, 2021. UNIVERSITY OF BELGRADE FACULTY OF MINING AND GEOLOGY Bojan N. Kostić CONTACT ...
... ....................................................................................................................................... 10 Neogen (N) ................................................................................................................................... 11 Kvartar (Q) ...Kostić N. Bojan. Kontaktni metamorfizam gornjokrednih sedimentnih stena Rudnika, Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2021