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Упит dcterms_subject_txt:groundwater control system

800 items

  • Effects of Energy Production and Consumption on Air Pollution in Serbia

    Marija Živković (2019)
    Energy production and combustion, mostly from unregulated or inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. Energy sector in Serbia is highly fossil fuel intensive: 87.88% of energy consumed in Serbia is related to fossil fuels, while almost 95% of energy sources are combusted. In 2017. energy related carbon dioxide emission in Serbia is was 47.95 million tones. The main source of carbon dioxide emission was coal, responsible for almost 70% of energy ...
    energy related emissions, Serbia
    ... need to be transformed to heat and/or electricity through combustion processes 3, which are the main sources of atmospheric pollution 4. The need to control atmospheric emissions of greenhouse and other gases and substances leads to the necessity of improving efficiency in energy production, transmission ...
    ... Search Savact Page El~ Bh there is an imperative — for safety reasons and to avoid corrosion to the pipeline transport ¥ ffl Energy and Air Pollution: system — to remove sulfur as soon as practicable after production. WEO 2016 Special B Create PDF Report | AI Foreword Figure 1.12 > Global average emissions ...

  • Primena termografije u rudarstvu

    Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragan Ignjatović, Dragutin Jovković, Filip Miletić (2019)
    Danas, gotovo da nema oblasti u nauci i tehnici u kojoj se Infracrvena termografija ne primenjuje kao metoda za lociranje i praćenje zagrejanih objekata ili tela, beskontaktnu procenu temperature površina, i nedestruktivno ispitivanje materijala. U radu su prikazane mogućnosti i perspektive primene ove metode u oblasti rudarstva.
    infracrvena termografija, rudarstvo, monitoring
    ... of fire in Jharia coalfield, Jharkhand, India: an appraisal. Current Science, Vol. 110 (9), pp. 1639-1650, 2016. [12] Industrial Monitoring & Control: Coal Stock pile spontaneuous combustion early detection. URL: https://www.imcontrol.com.au/white-papers/test-white-paper/ [13] Emitted Energy ...
    ... sports. URL: http://www.vale.com/EN/aboutvale/news/Pages/termografia-mina-esportes.aspx [16] Stryjek P, Nikisz T, Omylinski K., Inovative Run Flat System. Journal of KONES Powertrain and Transport, Vol. 22 (1) 299-306, 2015 [17] Ulah I., Yang F., Khan R., Liu L., Yang H., Gao B. & Sum K., Predictive ...

  • Indexing of textual databases based on lexical resources: A case study for Serbian

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2015)
    In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...
    ... information system of the Geological Dictionary (Thesaurus) containing about 4,000 geological terms described by definitions, of which about 3,000 have a translation into English. The most important cartographic content is: the basic geological map, maps of national parks, map of endangered groundwater bodies ...
    ... old system finds the positive match zlatonosna žica ‘gold vein’ when searching with zlato, which the new system misses (zlato and zlatonosan are two different lemmas); however, for the same reasons, the old system has the negative match Zlatokop (the name of one settlement), which the new system again ...
    ... abovementioned query. The charts show that the search precision of the old system is significantly better among first-ranked documents, while the recall is much better with the new system: among the first 80 documents the old system had 25 relevant responses, and the new had 39. If the Interpolated Average ...

  • 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
    ... structures in engineering systems. When the system has a backup or some other connection is used, the outcome is formed as a logical conclusion (if–then form) for any risk situation caused by a failure of the engineering system. For example, if the system consists of two elements, one and two, where ...
    ... risk level of failure in an engineering system using this methodology, it is necessary to rationally divide the system into subsystems and the subsystems into elements—that is, into functional units that each affect the risk indicators. The engineering system (the crushing machine) was divided into ...
    ... level, with the same membership degree of 0.30672, or 30.67%. 5.3. Risk Level Assessment of System Failure 5.3.1. Fuzzy Composition for Risk Level Assessment of System Failure A risk level assessment for system failure within the crushing machine was performed as a synthesis assessment of the risk level ...

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)
    ... is necessary to interconnect them into one integrated system. There are different development systems (shaft, decline, adit) which can be used to create such system. Suppose the deposit characteristics indicate that decline development system is preferred one. In such environment we treat development ...
    ... Genetic algorithm. 2. THE MODEL OF A DECLINE DEVELOPMENT SYSTEM In many cases, the ore deposit is composed of a few ore bodies that must be interconnected into one integrated system. The main idea that we used to create such system is based on the fact that somewhere in 3u (3–dimensional ...
    ... mine decline development system using genetic algorithm Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Optimisation of underground mine decline development system using genetic algorithm ...

  • Postojeće stanje i budući trendovi u preventivnoj zaštiti podzemnih voda Srbije

    Vladimir Živanović (2022)
    Podzemne vode predstavljaju osnovni, a u mnogim zemljama i jedini resurs za javno vodosnabdevanje stanovništva tako da zaštita podzemnih voda predstavlja bitan preduslov za njihovo dugotrajno i održivo korišćenje. Kako u svetu, tako i u Srbiji, zaštita podzemnih voda se najvećim delom svodi na primenu preventivnih mera zaštite. Kod planiranja zaštite većih prostora sve više se koriste metode za ocenu ranjivosti podzemnih voda. Njihova primena je posebno naglašena u karstnim područjima zato što se tu izdvajaju delovi terena sa ...
    Zaštita podzemnih voda, karte ranjivosti podzemnih voda, karta hazarda, karte rizika od kontaminacije, monitoring podzemnih voda, Srbija

  • Хидрогеолошки потенцијал карстних масива Озрена и Девице

    Саша Стојадиновић, Михаило Шевић, Јаков Андријашевић (2018)
    карстни масив, карстна издан, биланс подземних вода, резерве подземних вода

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... applications and knowledge assets, supported by knowledge management analytical services implemented in a business intelligence system. This paper describes such a system for mine safety and its application for accident analysis in mines, developed to improve efficiency, offer fast answers and key ...
    ... purposes. In this paper we outline our approach to development of a business intelligence system for mine safety illustrated by its application to accident analysis in mines. The aim of the BI system is not only to improve efficiency of mine safety procedures, enable faster answers and key safety ...
    ... kolonja@rgf.bg.ac.rs 13th ISCSM 2016 BELGRADE 2 system consists of several software components representing a combination of different information technologies, where interoperability between diverse software components is secured by a system of ontologies developed for mining engineering named ...

  • Razvoj integralnog modela za optimizaciju diskontinualnog sistema proizvodnje na površinskim kopovima nemetala

    Miodrag Čelebić (2024)
    Izbor optimalne mehanizacije u diskontinualnom sistemu transporta je jedna od najvažnijih odluka koju treba donijeti prilikom projektovanja površinskih kopova. Pri izboru optimalne mehanizacije, uticaj ima veliki broj faktora, kako prirodnih – geoloških i ekoloških, tako i tehničkih, ekonomskih i socijanih. Neki od njih se mogu izraziti numerički, u određenim mijernim jedinicama, a neki opisno, lingvističkim varijablama, shodno uslovima koji vladaju na rudnim ležištima, a koje karakterišu visok stepen neizvjesnosti i neodređenosti kako prilikom istraživanja, tako i tokom procesa eksploatacije ...
    izbor mehanizacije, tehnologija eksploatacije, diskontinualani sistem, ekspertsko odlučivanje, lingvističke varijable, MCDM, FAHP

  • Condition, problems and prospects of water supply from groundwater in Serbia

    Vesna Ristić Vakanjac, Bojan Hajdin (2019)
    podzemna voda, vodosnabdevanje, Srbija

  • Karst wastewater as a high quality, renewable and within the circular economy water resource

    Jovana Nikolić, Vesna Ristić Vakanjac (2021)
    High quality drinking water in it’s natural state is becoming less and less available to the human population. Based on the expected climate changes, it is considered that this resource will be less in the world but also in our region. Also, the accompanying polluting components that exceed the maximum allowable concentration are increasingly present in the waters. Even after the water treatment, it happens that some components are still in the drinking water, which adversely affects human health. ...
    water resource, groundwater, karst aquifer, water supply, irrigation

  • Preliminary analysis of Krupaja Spring discharge (Еastern Serbia)

    Jovana Nikolić, Vesna Ristić Vakanjac, Saša Milanović, Zoran Stevanović, Ljiljana Vasić (2020)
    karst aquifer, monitoring, groundwater regime, Krupaja Spring, Serbia

  • Permanent GNSS monitoring of landslide Umka

    Mileva Samardžić Petrović, Jovan Popović, Uroš Đurić, Biljana Abolmasov, Marko Pejić, Miloš Marjanović (2020)
    Клизиште Умка је једно од највећих насељених активних клизишта у Србији. Активност клизишта Умка се прати већ више од 85 година, различитим геотехничким и геодетским техникама. Од 2010. године, активност kлизишта се континуирано прати у реалном времену аутоматизованим перманентним системом за праћење базираним на Глобалним навигационим сателитским системима (ГНСС). Поред тога, од 2018. године активност клизишта се додатно прати кинематичким ГНСС одређивањем положаја скупа карактеристичних тачака као и применом UAV фотограметрије. Главни циљ овог рада је приказ резултата опажања три ...
    клизиште, перманентно праћење, ГНСС
    ... main characteristics of the established automated GNSS monitoring system can be find in Erić et al. [6]. Generally, the Umka monitoring system consists of GNSS network and supporting software solutions. The first part of the system, the network, consists of several reference points and one object ...
    ... of April and November were chosen because of the reduced vegetation and landslide dynamics, which largely depend on the Sava river level and groundwater levels in the landslide body. For each epoch, after the four base points are proven to be stable since the Epoch 0, landslide point positions were ...
    ... geodetic techniques. Since 2010, landslide activity has been continuously monitored by automated permanent Global Navigation Satellite System (GNSS) based monitoring system in real time. Furthermore, since 2018 landslide activity has been monitored by GNSS kinematic positioning of a set of characteristic ...

  • A tool for identifying the criticality in the disordered systems with metastable dynamics

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević (2021)
    Физика кондензоване материје

  • Hydrochemical impact of the hydraulic tunnel on groundwater in the complex aquifer system in Pirot, Serbia

    Marina Ćuk, Igor Jemcov, Ana Mladenović, Marina Čokorilo Ilić (2020)
    Hidrogeohemijski procesi, hidrohemijske promene, karstna izdan, tunel pod pritiskom, multivarijantne statističke analize

  • Middle Miocene otoliths of freshwater fishes from the Vracevic Lake (Serbian Lake System)

    Katarina Bradić-Milinović, Ljupko Rundić, Werner Schwarzhans (2021)
    средњи миоцен, отолити, Врачевић, Ваљевско-mионички басен, Српски језерски систем

  • Model upravljanja investicionim projektima otvaranja površinskih kopova uglja

    Cvjetko P. Stojanović (2015-04-27)
    Brze promene u okruženju pred rukovodioce postavljaju mnogobrojne zahteve,pre svega, one koji se tiču ostvarenja ciljeva u zadatom vremenu i raspoloživimsredstvima što zahteva fleksibilan pristup u organizovanju aktivnosti i efikasnost unjihovom sprovođenju.Upravljanje projektima, bilo koje vrste, suštinski, predstavlja veoma složenproces odlučivanja uslovljen velikim brojem ulaznih faktora. Ti faktori treba daomoguće fokusiranje na prioritete i ciljeve, praćenje realizacije, fleksibilnost uprevazilaženju teškoća, prilagođavanje promenama, te kontrolu nad ostvarenimrezultatima. Ovakav način upravljanja zahteva korišćenje proverenih tehnika i alata tetimski rad angažovanih na ...
    Projekat, upravljanje, metodologija, površinska eksploatacija, model

  • Model upravljanja investicionim projektima otvaranja površinskih kopova uglja

    Cvjetko P. Stojanović (2015-04-27)
    Brze promene u okruženju pred rukovodioce postavljaju mnogobrojne zahteve,pre svega, one koji se tiču ostvarenja ciljeva u zadatom vremenu i raspoloživimsredstvima što zahteva fleksibilan pristup u organizovanju aktivnosti i efikasnost unjihovom sprovođenju.Upravljanje projektima, bilo koje vrste, suštinski, predstavlja veoma složenproces odlučivanja uslovljen velikim brojem ulaznih faktora. Ti faktori treba daomoguće fokusiranje na prioritete i ciljeve, praćenje realizacije, fleksibilnost uprevazilaženju teškoća, prilagođavanje promenama, te kontrolu nad ostvarenimrezultatima. Ovakav način upravljanja zahteva korišćenje proverenih tehnika i alata tetimski rad angažovanih na ...
    Projekat, upravljanje, metodologija, površinska eksploatacija, model

  • Fizičko-hemijsko raspadanje krečnjaka ugrađenih u objekte Beogradske tvrđave i mogućnost konsolidacije

    Maja Z. Franković (2022)
    Beogradska tvrđava, spomenik kulture od izuzetnog značaja za Republiku Srbiju, izgrađena je od krečnjaka badenske starosti. Njihova litološka heterogenost, u sadejstvu sa uticajima okruženja, rezultira visokim intenzitetima raspadanja. Korelacijom intrinzičnih sa ekstrinzičnim faktorima, definisani su fizičko-hemijski procesi raspadanja ugrađenih mikrofacija krečnjaka. Aplikacijom neorganskih konsolidanata na karbonatnoj bazi (nano-kreča i Ca-acetoacetata) i alkoksisilana, te korelacijom fizičko-mehaničkih svojstava pre i nakon tretmana, ispitana je efektivnost u pogledu zaustavljanja dekohezije krečnjaka. Određivanjem petroloških, tehničkih svojstava i mapiranjem formi raspadanja Mračne kapije kao ...
    krečnjaci, forme i intenziteti degradacije, fizičko-hemijsko raspadanje, konsolidacija, nano-kreč, Ca-acetoacetat, alkoksisilani, Mračna kapija

  • Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation

    Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2023)
    The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...
    otpadne vode, toplotna pumpa, daljinsko grejanje, simulacija