Претрага
117 items
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Primena programa UVSZ pri zaštiti od miniranja
Primena energije eksploziva tj. miniranje, predstavlja osnovni način eksploatacije čvrstih mineralnih sirovina u rudarstvu. Miniranjem se postižu vrlo povoljni tehnoekonomski pokazatelji, koje nažalost prate i negativni efekti miniranja. U cilju zaštite životne sredine potrebno je za svaku radnu sredinu odrediti jednačinu oscilovanja stenske mase pri miniranju. Ova jednačina definiše promenu brzine oscilovanja stenske mase u zavisnosti od rastojanja, količine eksploziva, uslova izvođenja miniranja i geoloških karakteristika stenske... je snimak promene brzine oscilovanja sa vremenom, tj. velosigram za komponente brzine merene u tri pravca. instrument S/N 103 Client: ROCK QUARY,, Event number 715 Operation: Miniranje - 1V Date & time Sat 3 Sep 2016.12:31:55 Location: PK ,,Manastiriste— Reg Length 2.884152 s / 0.997 kHz Operator: Vector ...Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac, Rade Tokalić. "Primena programa UVSZ pri zaštiti od miniranja" in XIII skup privrednika i naučnika SPIN’21, Industrija 4.0 – mogu nosti, izazovi i rešenja za digitalnu transformaciju privrede, Univerzitet u Beogradu, Fakultet organizacionih nauka (2021)
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Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations
Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović. "Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations" in International Scientific Conference - Sinteza 2024, Belgrade, 16. maj 2024, Singidunum University (2024). https://doi.org/10.15308/Sinteza-2024-288-294
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The effect of finite driving rate on avalanche distributions
Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear PhysicsSonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević. "The effect of finite driving rate on avalanche distributions" in Journal of Statistical Mechanics: Theory and Experiment, IOP Publishing (2021). https://doi.org/10.1088/1742-5468/ac1f12
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Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike
Milanka N. Negovanović (2015-06-30)Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina... (MM1) - 14.09. 2010. u 13:19 h, (MM3) - 25.09.2010. u 14:31 h, (MM3) - 06.10. 2010. u 12:29 h, (MM11) version 2.11.0 Instrument S/N Event number Date & time Reg Length Vector max (ch 1-3) Timescale Client: Operation: Location: Operator: Notes: Channel Input Unit Trig level Pk Diff ...
... Sat 7 Aug 2010 13:05:25 2.655968 s / 0.997 kHz 0.69 mm/s at 0.489 s 0.4 s/div 0.0 0.4 0.8 1.2 1.6 2.0 2.4 version 2.11.0 Instrument S/N Event number Date & time Reg Length Vector max (ch 1-3) Timescale Client: Operation: Location: Operator: Notes: Channel Input Unit Trig level Pk Diff ...
... 14:21:49 2.130391 s / 0.997 kHz 0.61 mm/s at -0.001 s 0.25 s/div 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 version 2.11.0 Instrument S/N Event number Date & time Reg Length Vector max (ch 1-3) Timescale Client: Operation: Location: Operator: Notes: Channel Input Unit Trig level Pk Diff ...Milanka N. Negovanović. "Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-06-30)
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Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike
Milanka N. Negovanović (2015-06-30)Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina... (MM1) - 14.09. 2010. u 13:19 h, (MM3) - 25.09.2010. u 14:31 h, (MM3) - 06.10. 2010. u 12:29 h, (MM11) version 2.11.0 Instrument S/N Event number Date & time Reg Length Vector max (ch 1-3) Timescale Client: Operation: Location: Operator: Notes: Channel Input Unit Trig level Pk Diff ...
... Sat 7 Aug 2010 13:05:25 2.655968 s / 0.997 kHz 0.69 mm/s at 0.489 s 0.4 s/div 0.0 0.4 0.8 1.2 1.6 2.0 2.4 version 2.11.0 Instrument S/N Event number Date & time Reg Length Vector max (ch 1-3) Timescale Client: Operation: Location: Operator: Notes: Channel Input Unit Trig level Pk Diff ...
... 14:21:49 2.130391 s / 0.997 kHz 0.61 mm/s at -0.001 s 0.25 s/div 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 version 2.11.0 Instrument S/N Event number Date & time Reg Length Vector max (ch 1-3) Timescale Client: Operation: Location: Operator: Notes: Channel Input Unit Trig level Pk Diff ...Milanka N. Negovanović. "Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-06-30)
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Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics
Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar. "Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics" in Clay Minerals, Mineralogical Society (2019). https://doi.org/10.1180/clm.2019.49
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Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names
In this paper we present a rule- and lexicon-based system for the recognition of Named Entities (NE) in Serbian news paper texts that was used to prepare a gold standard annotated with personal names. It was further used to prepare training sets for four different levels of annota tion, which were further used to train two Named Entity Recognition (NER) sys tems: Stanford and spaCy. All obtained models, together with a rule- and lexicon based system were evaluated on ...... 10 7 Future Work For the upcoming research, we plan to apply the procedure we used for personal names to other NE classes (organization, location, event, tempo- ral, quantitative, etc) and to experiment with other ML NER methods and tools with an ultimate goal to produce a successful hybrid system. The ...Branislava Šandrih, Cvetana Krstev, Ranka Stanković. "Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names" in Proceedings - Natural Language Processing in a Deep Learning World, Incoma Ltd., Shoumen, Bulgaria (2019). https://doi.org/10.26615/978-954-452-056-4_122
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Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications
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 ...... metamor- phic and/or silicified/dolomitized sediments. They are overlain by Jurassic ophiolitic mélange and obducted ophiolites. After an erosional event, a Cretaceous sedi- mentation cycle started at various times, depending on the location. This produced Aptian flysch and younger (clastic, carbonate ...
... metamor- phic and/or silicified/dolomitized sediments. They are overlain by Jurassic ophiolitic mélange and obducted ophiolites. After an erosional event, a Cretaceous sedi- mentation cycle started at various times, depending on the location. This produced Aptian flysch and younger (clastic, carbonate ...Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov. "Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications" in Swiss Journal of Geosciences, Basel : Springer International Publishing (2018). https://doi.org/10.1007/s00015-018-0321-8
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Named Entity Recognition for Distant Reading in ELTeC
Francesca Frontini, Carmen Brando, Joanna Byszuk, Ioana Galleron, Diana Santos, Ranka Stanković (2020)Akcija COST „Udaljeno čitanje za evropsku književnu istoriju“, koja je počela 2017. godine, ima među svojim glavnim ciljevima stvaranje višejezične zbirke evropskih književnih tekstova (ELTeC) otvorenog koda. U ovom radu predstavljamo rad koji je obavljen na ručnom označavanju selekcije ELTeC kolekcije za imenovane entitete, kao i na proceni postojećih alata za prepoznavanje imenovanih entiteta u pogledu njihove sposobnosti da automatski urade takve anotacije. U poslednjem paragrafu se razmatraju zajedničke tačke između ove inicijative i CLARIN-a.... Francesca Frontini, Carmen Brando, Joanna Byszuk, Ioana Galleron, Diana Santos, Ranka Stanković | CLARIN Annual Conference 2020, Oct 2020, Virtual Event, France | 2020 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005135 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду омогућава ...Francesca Frontini, Carmen Brando, Joanna Byszuk, Ioana Galleron, Diana Santos, Ranka Stanković. "Named Entity Recognition for Distant Reading in ELTeC" in CLARIN Annual Conference 2020, Oct 2020, Virtual Event, France, CLARIN (2020)
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Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera
Aleksandra B. Kolarski (2016-08-25)Radio talasi vrlo niskih frekvencija VLF (eng. Very Low Frequency) frekventnog opsega od 3 do 30 kHz, koji se prostiru talasovodom Zemlja-jonosfera (50 -90 km) su, kao što je poznato, efikasni i nezamenljivi u osmatranju pojava u niskoj jonosferi, sa tla...prostiranje talasa vrlo niskih frekvencija, talasovod Zemlja-jonosfera, globalno električno kolo, atmosfersko električno pražnjenje, kratkotrajne svetlosne pojave... and LEP (Lightning-induced Electron precipitation) events were identified by their signatures on VLF perturbations. On the basis of the sprite event registration time from I.M.T.N. (with 0.001 - 0.1 s resolution) and in coincidence with the lightning discharge time (WWLLN and EUCLID with 1 ns ...
... resolution), a one-minute VLF registration interval (with 0.1 s resolution) has been analysed in detail for each particular event. The time of the beginning of the amplitude and phase delay perturbations, the respective onset time to maximum perturbation, and the recovery time to u ...
... range from 4.7106 to 1.61011 m-3, while the dissipated energy is estimated to vary between 5.4 kJ and 714 MJ. VLF perturbations related to elve event occurrence with parent lightning peak current of 250 kA amount to electron density of 7107 m-3, with the dissipated energy estimated to 6 GJ. The ...Aleksandra B. Kolarski. "Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-08-25)
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Употреба веб платформе Омека за дигиталне библиотеке из домена рударства
У овом раду биће представљена Омека, веб платформа за приказивање дигиталних колекциjа и систем за управљање њиховим садржаjем. Њену примену у области техничких наука, а конкретно у области рударства, приказаћемо на примеру дигиталне библиотеке ROmeka@RGF. За Омеку смо се определили првенствено због чињенице да jе jедноставна за коришћење, има обимну пратећу документациjу и не захтева уско специфичне информатичке вештине што jе чини приступачном за већину корисника, а нарочито за рударске инжењере, коjима jе ова дигитална библиотека првенствено намењена. Документа ...... цртежa, графичког дизаjна, планова и карата); – веб стране (Website), HTML странице и повезане слике, аудио и видео датотеке, итд.; – догађаjи (Event), временски ограничене поjаве, на пример: изложба, веб конференциjа, радионица, пожар, битка, суђење); – електронска пошта (Email), текстуалне поруке ...Александра Томашевић, Биљана Лазић, Далибор Воркапић, Михаило Шкорић, Љиљана Колоња. "Употреба веб платформе Омека за дигиталне библиотеке из домена рударства" in Инфотека, Филолошки факултет, Универзитет у Београду; Универзитетска библиотека „Светозар Марковић“; Заједница библиотека универзитета у Србији (2017)
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Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina
Tina Dašić, Ljiljana Vasić (2020)Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry,Global and Planetary ChangeTina Dašić, Ljiljana Vasić. "Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina" in Environmental Earth Sciences, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s12665-020-08987-4
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Towards the semantic annotation of SR-ELEXIS corpus: Insights into Multiword Expressions and Named Entities
Овај рад представља активности на развоју корпуса ELEXIS-sr, српском додатку вишејезичном анотираном корпусу ELEXIS-а, који се састоји од семантичких анотација и репозиторија значења речи. ELEXIS је паралелни вишејезични анотирани корпус на десет европских језика, који може да се користи као вишејезички репер за евалуацију европских језика са мање и средње развијеним ресурсима. Фокус овог рада је на вишечланим изразима и именованим ентитетима, њиховом препознавању у скупу реченица ELEXIS-sr и поређењу са анотацијама на другим језицима. Разматрају се први кораци ...Cvetana Krstev, Ranka Stanković, Aleksandra Marković, Teodora Mihajlov. "Towards the semantic annotation of SR-ELEXIS corpus: Insights into Multiword Expressions and Named Entities" in Proceedings of the Joint Workshop on Multiword Expressions and Universal Dependencies (MWE-UD) @ LREC-COLING 2024, Turin, May 25, 2024, ELRA and ICCL (2024)
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Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone
The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...Emő Márton, Marinko Toljić, Vesna Cvetkov. "Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone" in Journal of Geodynamics, Elsevier BV (2022). https://doi.org/10.1016/j.jog.2021.101880
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Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides
Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem... sets of dextral strike-slip faults) mutu- ally truncate each other in outcrops. In such cases, we associate these structures to the same tectonic event. The post-Cretaceous kinematics observed in multiple outcrops along strike of the major faults is assigned to its specific expression at map scale ...
... offsets observed in the field with the one at the map scale. We present the mapped fault-slip data as being the result of a single large tectonic event because the observed cross- cutting relationships of reported structures with significantly different kinematics (normal, strike-slip and reverse ...
... (e.g., S2, Fig. 8). This mutual interplay between normal and dextral strike-slip faulting demonstrate that they formed during the same deformation event. 5. Summary and integration of outcrop- and map-scale structures in the context of strain partitioning The dominant strike-slip deformation observed ...Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga. "Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides" in Global and Planetary Change, Elsevier BV (2022). https://doi.org/10.1016/j.gloplacha.2021.103714
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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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Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons
Mihailo Škorić (2017)The goal of this paper is to draw attention to the possibility of using emoticon-riddled text on the web in language-neutral sentiment analysis. It introduces several innovations in the existing framework of research and tests their effectiveness. It also presents a software tool especially made for that purpose, explains how it builds a database with sentimental value of terms and offers the user manual. Finally, it presents a software tool that tests the new database and gives some examples ...... chooses the name and location. Content is copied from the temporary file created in the previous step, and it represents the final database. In the event that the user has already processed some files, he also has Dopuni postojeću bazu (Update existing base) available (Figure 10). It allows the data ...Mihailo Škorić. "Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons" in Infotheca, Faculty of Philology, University of Belgrade (2017). https://doi.org/10.18485/infotheca.2017.17.1.4
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Centar za hidrogeologiju karsta - 15 godina nauke i struke
... CKH from June 1 to 7, 2021, with three separate events: a. CEKA 2021, from June 1 to 4, 2021, which took place on the Zoom platform (more on this event can be found in Chapter dedicated to this course). b. A special thematic session “Lecturing . by Distinguished Guests' took place on June 5, 2021 ...
... Research, Ragusa, and the Mupnicipality of Custonaci, Sicily, Italy. CKH was among the other organizations that supported and participated in this event. 15 CKH Multidisciplinarna konferencija „KARST 2022: Značaj, stanje tehnike i perspektiva korišćenja i zaštite resursa u karstu” Multidisciplinarna ...
... Utilisation and Protection of Resources in Karst' was dedicated to IYCK UIS as well and it was held October 21 to 22, 2022. The organizers of the event were the Serbian Academy of Sciences and Arts (SASA) - Board for Karst and Speleology, the Centre for Karst Hydrogeology of the Faculty of Mining ...urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović. Centar za hidrogeologiju karsta - 15 godina nauke i struke, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, Centar za hidrogeologiju karsta, 2023
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A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice
Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper, we ...... model of one of these classes — the Simulation-Fire class. This class includes specific procedures based on the mathematical model of airflow in the event of fire incidence in complex mine ventilation networks. Data services procure data maintenance, data access and modification functions. The database ...Nikola Lilić, Ivan Obradović, Ranka Stanković. "A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice" in Mineral Resources Engineering 11 no. 4, Imperial College Press (2002): 361-382. https://doi.org/10.1142/S0950609802001014
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Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)
Miloš Radonjić (2020)This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides... exploration of continental margins.– Sedimentology, 56, 267–318. doi: 10.1111/j.1365-3091.2008.01019.x ORR, P. (1994): Trace fossil tiering within event beds and preservation of frozen profiles: An example from the Lower Carboniferous of Menorca.– Palaios, 9/2, 202–210. doi: 10.2307/3515106 ORR, P ...Miloš Radonjić. "Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)" in Geologia Croatica, Croatian Geological Survey (2020). https://doi.org/10.4154/gc.2020.13