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Упит dcterms_subject_txt:downhole intervention

33 items

  • Arsenic in tape waters of the south Pannonian basin (Serbia) and arsenic risk assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    ... 2008. 5. SUN G.F., PI J.B., LI B., GUO X.Y., YAMAUCHI H., YOSHIDA T. Progresses on researches of endemic arsenism in China: population at risk, intervention actions, and relat- ed scientific issues W.R. Chappell, C.O. Abernathy, R.L. Calderon (Eds.), Arsenic exposure and health effects IV, Elsevier, ...

  • Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia

    Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  • Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian

    Ranka Stanković, Branislava Šandrih, Cvetana Krstev, Miloš Utvić, Mihailo Škorić (2020)
    The training of new tagger models for Serbian is primarily motivated by the enhancement of the existing tagset with the grammatical category of a gender. The harmonization of resources that were manually annotated within different projects over a long period of time was an important task, enabled by the development of tools that support partial automation. The supporting tools take into account different taggers and tagsets. This paper focuses on TreeTagger and spaCy taggers, and the annotation schema alignment ...
    Part-of-Speech tagging, lemmatization, corpus, evaluation, Serbian, morphological dictionary
    ... The corpus of training set texts needed checking and cor- rection. Corpus correction is a time consuming process, which requires a lot of manual intervention and help of lin- guistic specialists. Our focus was not only on removing inconsistencies and reducing the ambiguity level, but also on introducing ...

  • BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations

    Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina (2023)
    Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... dynamogram of downhole pump operation represents the relationship between load and the stroke of the smooth rod. In most cases, the operation of the downhole pump is monitored by recording surface dynamograms, while in the case of a system for recording time functions of stroke and load, downhole dynamograms ...
    ... operating conditions of the downhole pump. Actual dynamograms, on the other hand, depict the operational efficiency of the deep well pumping system, including the well, downhole and surface equipment, and the effects of various phenomena associated with downhole pump operation. 12 b o ' ...
    ... e % 2 «0 bl · tod glatko Sipko S(cm) Figure 3.2 Dynamograms of downhole pump operation: a})load, b)surface, c)downhole 13 3.2.1 Theoretical dynamogram The theoretical dynamogram represents an idealized model of the downhole pumping system operation, used as a basis for analysis. It assumes ...

  • Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica

    Natalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel (2019)
    Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and Technology

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • 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

  • Геохемијске карактеристике флотацијског јаловишта рудника Грот (југоисточна Србија)

    Božidar Đokić (2012-07-16)
    У дисертацији су анализиране геохемијске карактеристике флотацијскогјаловишта које се налази на највишој надморској висини у Србији. Јаловиште јенастало преграђивањем узводно од Селишког потока. Географске, геолошке игеоморфолошке карактеристике области у којима је смештено највећим делом суутицали на његову морфологију и морфометрију. Јаловиште чини велики, јужни ијугоисточни плато и велика брана. Делови јаловишта су засебно испитивани, азатим и њихова међусобна интеракција и утицаји на окружење.Прикупљени узорци су испитивани рендгенском дифракциономанализом, скенирајућом електронском микроскопијом, рендгенскомфлуоресцентном спектрометријом, гранулометријском и хемијском анализом.Рендгенском дифракционом анализом ...
    флотација, јаловиште, скенирајућа електронско-микроскопскаанализа, рендгенска флуоресцентна спектрометрија, Pb-Zn руда,тешки метали, контаминација
    ... њиховог испитивања. Службени гласник РС, бр. 23/94. 7. Target values and soil remediation intervention values and background concentrations soil/sediment and groundwater for metals. Dutch Target and Intervention Values, 2000 (the New Dutch List). Евид. број анализе и стандарди Анализирани ...
    ... их програма. Службени гласник РС, бр. 88⁄2011. Target values and soil remediation intervention values and background concentrations soil/sediment and groundwater for metals. Dutch Target and Intervention Values, 2000 (the New Dutch List). доступно на http://www. Esdat.net/EnvironmentalS ...

  • Геохемијске карактеристике флотацијског јаловишта рудника Грот (југоисточна Србија)

    Božidar Đokić (2012-07-16)
    У дисертацији су анализиране геохемијске карактеристике флотацијскогјаловишта које се налази на највишој надморској висини у Србији. Јаловиште јенастало преграђивањем узводно од Селишког потока. Географске, геолошке игеоморфолошке карактеристике области у којима је смештено највећим делом суутицали на његову морфологију и морфометрију. Јаловиште чини велики, јужни ијугоисточни плато и велика брана. Делови јаловишта су засебно испитивани, азатим и њихова међусобна интеракција и утицаји на окружење.Прикупљени узорци су испитивани рендгенском дифракциономанализом, скенирајућом електронском микроскопијом, рендгенскомфлуоресцентном спектрометријом, гранулометријском и хемијском анализом.Рендгенском дифракционом анализом ...
    флотација, јаловиште, скенирајућа електронско-микроскопскаанализа, рендгенска флуоресцентна спектрометрија, Pb-Zn руда,тешки метали, контаминација
    ... њиховог испитивања. Службени гласник РС, бр. 23/94. 7. Target values and soil remediation intervention values and background concentrations soil/sediment and groundwater for metals. Dutch Target and Intervention Values, 2000 (the New Dutch List). Евид. број анализе и стандарди Анализирани ...
    ... их програма. Службени гласник РС, бр. 88⁄2011. Target values and soil remediation intervention values and background concentrations soil/sediment and groundwater for metals. Dutch Target and Intervention Values, 2000 (the New Dutch List). доступно на http://www. Esdat.net/EnvironmentalS ...

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... Serbian food supply chains. Presence of gray economy, underdeveloped system of public warehouses, forward sales of agricultural products and intervention purchase of agricultural products as well as insufficiently developed legislation and enforcement mechanisms further deteriorating competitiveness ...
    ... Commodity Exchanges, which is in the process of public hearing, will enable the organization of an agricultural support system through market intervention mechanisms with additional effects on more efficient management of commodity reserves and reduction of the current exposure of the economy to ...
    ... l Energy Agency (IEA), 61, 86 international law, 191 international meetings, 214 international standards, 39 international trade, 32. intervention, 94 investment, 1, 2, 26, 42, 48, 75, 97, 99, 183, 220, 295 investments, 16, 22, 24, 31, 32, 42, 48, 62, 94, 05, 96, 99, 277, 303 investors ...

  • 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.