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Упит dcterms_subject_txt:text processing

338 items

  • Fuzzy expert analysis of the severity of mining machinery failure

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...
    Severity of failure, Severity of failure assessment, Mining machinery, Fuzzy sets, Fuzzy logic

  • Poređenje rezultata interferometrijske analize za zemljotrese na istočnom anatolijskom rasedu od 2020. i 2023. godine

    Dragan Živković (2024)
    Ovaj rad se bavi analizom površinskih deformacija izazvanih zemljotresima u Turskoj iz 2020. i 2023. godine korišćenjem diferencijalne satelitske radarske interferometrije (DInSAR tehnike). Cilj istraživanja bio je da se kvantifikuju i uporede deformacije terena izazvane ovim seizmičkim događajima i da se razumeju mehanizmi koji stoje iza oslobađanja seizmičke energije u regionu. Analizom DInSAR snimaka, identifikovane su različite deformacije duž rasednih zona za svaki zemljotres. Dok je zemljotres iz 2020. godine (M 6,7) izazvao lokalizovane deformacije duž Istočno anatolijskog raseda, zemljotres ...
    DInSAR, Istočno anatolijski rased, Kahramanmaraški trostruki spoj

  • Fuzzy Model for Risk Assessment of Machinery Failures

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    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 ...
    fazi teorija, rizik, otkaz rudarskih mašina
    ... accurate records on maintenance do not exist. This fact makes it impossible to determine risk and reliability parameters based on the statistical processing of data obtained from machine history, and the only alternative is to use the experiences of employees (given in a linguistic fuzzy form). 3. ...
    ... state of the machinery at the time it is observed (in this study, we did this in the context of the exploitation of mineral resources and mineral processing). The condition of the machines is examined through an analysis of existing data on the operation of the machine, including failures that have occurred ...
    ... for this crushing machine requires that the process of stone aggregate grinding be stopped. This machine is significant in exploitation and in the processing of stone aggregate, which was another reason it was chosen to depict the developed model for risk assessment. The third reason was that the company ...

  • Снимање подземних инсталација GPR (Ground penetrating Radar) системом

    Невена Ђурђев (2024)
    Циљ овог мастер рада на тему ,,Снимање подземних инстлација GPR (Ground penetrating radar) системом” је био да се прецизно идентификују положаји подземних инсталација и прикључака, због сумње да су поједине инсталације постављене изван пројектованих позиција.Георадарски систем одабран је за детектовање и идентификовање подземних инсталација, због своје способности да обезбеди неинвазивно и детаљно снимање подземних структура.Првобитно је примењена GNSS метода снимања коришћењем GPS-а, потом услед немогућности отварања шахти, одлучено је да се примени георадарска у комбинацији са електромагнетном методом. Након ...
    катастар, катастар водова, подземне инсталације, методе детекције подземних инсталација, георадарска метода, георадар
    ... ce o0pa)ui nojlaTaka. 5.4. OBPAJIA JIOBHJEHMHX IIOJIATAKA IIpBa oOpaMa mojaraka H3BpmmeHa je y arumHKamjH Ha TaOJeTy HOJI CeTMCHTOM „,Image Processing”. V kojeM mocrojH ommuwja „Auto Gain” uMJjHM yKJbyuemeM arMKamuja ayToMaTcKuH (buzrrpupa JoOujeHe IHojlaTKe, aj1Hi HCKJbyucMbeM OBE Orje OmepaTep ...
    ... MO)KE CaM mojmemaBaTH OcTymHe (umTepe Kao mro cy „Linear Gain” „fTime Gain Compensation” a „Near-Field Image” a „Full Depth Image”. 86 Image Processing Al Auto Gain Adjust Gain \ OK \ Near-Field Image Linear Gain (dB) Time Gain Compensation (dB/ns) Y 3.4 Full Depth Image Linear Gain ...
    ... Theory and applications. Institution of Electrical Engineers, 2004. 15. Hargreaves, M. M., & Schuster, J. A. (2010). Ground penetrating radar data processing and interpretation. Journal of Applied Geophysics 2010. 91 16. Cook, J. J. P. Introduction to ground penetrating radar: I. Principles of ground ...

  • 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
    ... surpass the current best-performing membranes. Ideas to improve composite systems by alternate chemistries, re-engineering the material systems, and processing techniques will provide critical insight into the barriers to engineering sophisticated composite systems for future membrane-based CO2 separation ...
    ... of 300 to 600 kg of CO- per barrel of oil in the United States, while an oil barrel emits about 500 kg of CO over its lifecycle (production, processing, transportation, and combustion). As a result, it is reasonably argued that CO»-enhanced oil/gas recovery opens the possibility that an oil barrel's ...
    ... org/10.1039/C2DT31550E [47] E. J. Granite and T. O'Brien, “Review of novel methods for carbon dioxide separation from flue and fuel gases,” Fuel Processing Technology, vol. 86, no. 14-15, pp. 1423—1434, 2005. [48] Rodriguez, N. et al.: Experimental investigation of a circulating fluidized-bed reactor ...

  • Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)

    Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)

  • The Usage of Various Lexical Resources and Tools to Improve the Performance of Web Search Engines

    Krstev Cvetana, Stanković Ranka, Vitas Duško, Obradović Ivan (2008)
    In this paper we present how resources and tools developed within the Human Language Technology Group at the University of Belgrade can be used for tuning queries before submitting them to a web search engine. We argue that the selection of words chosen for a query, which are of paramount importance for the quality of results obtained by the query, can be substantially improved by using various lexical resources, such as morphological dictionaries and wordnets. These dictionaries enable semantic ...
    LR web services, MultiWord Expressions & Collocations, Information Extraction, Information Retrieval
    ... send a message’. In some cases, unrelated results are obtained. As Google tries to be too smart it assumes that an occurrence of ‘s’ in Serbian text can be replaced by ‘š’. Thus, when searching for strasna nedelja ‘Passion Week’ the unrelated results for strašna nedelja ‘horrible week’ or ‘horrible ...
    ... française 87. Paris: Larousse http://www-igm.univ-mlv.fr/~unitex/ Krstev, C., et al., (2008). Resources and Methods in the Morphosyntactic Processing of Serbo-Croatian, In Formal Description of Slavic Languages: The Fifth Conference, Leipzig 2003, Zybatow, Gerhild et al. (eds.), Peter Lang: ...

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... (7) - good = (0/j=1, 0/j=2, 0.25/j=3, 1/j=4, 0.25/j=5); - excellent = (0/j=1, 0/j=2, 0/j=3, 0.25/j=4, 1/j=5); B. Questionnaire, statistical processing Employees operating with the bulldozers or connected to their maintenance and logistic are asked to field in questionnaire. Questionnaire have ...

  • Značaj geografske širine za lociranje uzročnika magnetnih anomalija kod prospekcije arheoloških lokaliteta

    Vesna Cvetkov (2020)
    ... tes in the exploration of archaeological sites, Archaeological Prospection 7, 1: 17-30. Whitehead, N., Musselman, C. 2007. 2D Frequency Domain Processing of Potential Field Data, Extension for Oa- sis montaj Tutorial. Geosoft. Wynn, J. 1986. A review of geophysical methods used in archaeology. Geoarcha- ...

  • OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian

    Ranka Stanković, Maxim Ionov, Medina Bajtarević, Lorena Ninčević (2024)
    Ovaj rad predstavlja novi jezički resurs za pretraživanje i istraživanje verbalnih aspektnih parova u BCS (bosanskom, hrvatskom i srpskom), kreiran korišćenjem principa Lingvističkih Povezanih Otvorenih Podataka (LLOD). Pošto ne postoji resurs koji bi pomogao učenicima bosanskog, hrvatskog i srpskog kao stranih jezika da prepoznaju aspekt glagola ili njegove parove, kreirali smo novi resurs koji će korisnicima pružiti informacije o aspektu, kao i link ka aspektnim parovima glagola. Ovaj resurs takođe sadrži spoljne linkove ka monolingvalnim rečnicima, Wordnetu i BabelNetu. ...
    aspekt glagola, lingvistički otvoreni podaci, BCS

  • 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

  • Multihazard Exposure Assessment on the Valjevo City Road Network

    Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović (2019)
    Prirodni hazardi, izloženost, klizišta, poplave, bujice, GIS, R

  • Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...
    Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatori

  • Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović (2022)
    This work presents a model for determining the availability of continuous systems at open pits by applying fuzzy logic and fuzzy inference systems. The applied model was formed by the synthesis of independent partial indicators of availability. The model is based on an expert system for assessing the availability of continuous mining systems. The availability of the system, as a complex state parameter, is decomposed into the partial indicators, reliability, and convenience of maintenance, and the fuzzy compositions, used ...
    системи, континуални систем експоатације, површински коп, рударство, расположивост, фази логика, max–min композиција, min–max композиција

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... (2003) Petroleum and Gas Field Processing, CRC Press. Abdul-Wahab S., Elkamel A., Madhuranthakam C.R., Al-Otaibi M.B. (2006) Building inferential estimators for modeling product quality in a crude oil desalting and dehydration process, Chemical Engineering and Processing: Process Intensification ...
    ... ommercial-asset-valuation. Amal (2011), Production data. Ancheyta J., Fernando T. (2009) Asphaltenes: chemical transformation during hydro-processing of heavy oils. New York, NY, USA: CRC Press Taylor & Francis Group. APPA (2011), African Petroleum Producers Association, www.appa.int. APS ...
    ... Beijing, China, Society of Petroleum Engineers. Wang S.L., Flamberg A., Kikabhai T. (1999) Select the optimum pour point depressant, Hydrocarbon Processing, 78,2. Wang L.H., Deng J.G, Zhou J.L., Liu S.J., Li P., Zhao W.L., Liao J.H., (2011) A physical simulation experiment on sanding in weakly ...

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... (2003) Petroleum and Gas Field Processing, CRC Press. Abdul-Wahab S., Elkamel A., Madhuranthakam C.R., Al-Otaibi M.B. (2006) Building inferential estimators for modeling product quality in a crude oil desalting and dehydration process, Chemical Engineering and Processing: Process Intensification ...
    ... ommercial-asset-valuation. Amal (2011), Production data. Ancheyta J., Fernando T. (2009) Asphaltenes: chemical transformation during hydro-processing of heavy oils. New York, NY, USA: CRC Press Taylor & Francis Group. APPA (2011), African Petroleum Producers Association, www.appa.int. APS ...
    ... Beijing, China, Society of Petroleum Engineers. Wang S.L., Flamberg A., Kikabhai T. (1999) Select the optimum pour point depressant, Hydrocarbon Processing, 78,2. Wang L.H., Deng J.G, Zhou J.L., Liu S.J., Li P., Zhao W.L., Liao J.H., (2011) A physical simulation experiment on sanding in weakly ...

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... p.201-216. [9] Kursun Unver, I. and Terzi, M., 2018. Distribution of trace elements in coal and coal fly ash and their recovery with mineral processing practices: A review. Joural of Mining and Environment, 9(3), p.641-655. [10] Costis, S., Mueller, K.K., Coudert, L., Neculita, C.M., Reynier ...
    ... (Second Edition). Elsevier, Vol. 13, p. 1-28. [69] Gan, Y. and Griffin, W.M., 2018. Analysis of life-cycle GHG emissions for iron ore mining and processing in China —Uncertainty and trends. Resources Policy, 56, p.90-96. [70] Abzalov, M. and Abzalov, M., 2016. Mining methods. Applied Mining Geology ...
    ... Mineral sands: An overview of the industry. Unpublished. Capel: Jluka Resources Limited. [78] Moon, P., Choudhury, A.S. and Mukherjee, K., 2022. Processing of port dredged sand in offshore set-up for value additton—Approach and constraints. In Innovafive Exploration Methods for Minerals, Oil, Gas ...

  • Речник САНУ као база терминолошких речника (на примеру речника кулинарства)

    Рада Стијовић, Олга Сабо, Ранка Станковић (2017)
    ... graphs for the extraction of multiword lexical units that are allocated to the frequency of terms that are significantly more frequent in a culinary text than in the corpus of contemporary Serbian language. Using this approach, we were able to identify extremely rich term collection for culinary ...
    ... 1959–2014, I–XIX. Литература 1. Krstev, Cvetana, Duško Vitas and Gordana Pavlović-Lažetić. „Resources and methods in the morphosyntactic processing of Serbo-Croatian.” In Gerhild Zybatow et al. (eds.) Formal Description of Slavic Languages: The Fifth Conference, Leipzig 2003, pp. 3-17. Frankfurt ...

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • Environmental Energy Security Indicators as Tools for Environmental Protection

    Aleksandar Madžarević, Dejan Ivezić, Marija Živković , Miloš Tansijević (2019)
    Еколошка прихватљивост је постала незаменљив синтезни показатељ сваке валидне енергетске анализе у последње две-три деценије. Енергетска безбедност је у директној хармонији с еколошком прихватљивошћу кроз многе прописане политичке циљеве, економске користи, правне тековине итд. Индикатори еколошке сигурности представљају један од основних елемената за одређивање енергетске безбедности и снажне алате за усмеравање енергетског сектора ка одрживом развоју. У овом раду, анализа је била концентрисана на показатеље енергетске безбедности у области животне средине који се односе на сектор природног гаса у ...
    енергетска безбедност, еколошки енергетски индикатори, заштита животне средине, еколошка прихватљивост
    ... During the process, data is collected, which can be done on statistical level (based on calculation, software model result, projections, statistical processing, etc.) or based on expert analysis, i.e. attitude and court of experts. The partial indicators within this synthesis indicator are entered the ...