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Упит dcterms_subject_txt:fluid loss control

351 items

  • On the distribution modulo 1 of the sum of powers of a Salem number

    Dragan Stankov (2016)
    It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes

    Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre (2022)
    Earth-Surface Processes

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... caused high control of the level of waste materials being released into the environment, and consequently, due to applying adequate techniques for waste purification, the influence of industry on the environment is usually very small or negligible. On the other hand, in developing countries, control and human ...
    ... caused high control of the level of waste materials being released into the environment, and consequently, due to applying adequate techniques for waste purification, the influence of industry on the environment is usually very small or negligible. On the other hand, in developing countries, control and human ...
    ... negative effect, especially for human health, is the release of the wastewater. Namely, contaminated wastewater from tailings, is released without any control and with a flow of about 100 m3/h, contaminating the river Korbevečka and polluting the South Morava, which belongs to the Danube basin. It is very ...

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... oscillation of the rock mass particles is manifested as a shock and represents one of the negative effects of blasting. In order both to evaluate and control the seismic effect of blasting, as well as to plan it, the determination of soil oscillation law is required, with the strike: mine field - facilities ...
    ... determination of the soil oscillation velocity is enabled for each blast operation in advance, thus blasting is, as regards seismic effect, under control, which gives an opportunity to plan the magnitude of shock waves for each future blast operation (Trajković et al. 2005). In this manner, the negative ...

  • Legal framework for recultivation of degraded areas caused by mining exploitation

    Radmila Gaćina (2023)
    Prilikom površinske i podzemne eksploatacije uglja eksploatacioni sistemi oštećuju veće ili manje površine zemljišta. Iskustva pokazuju da su oštećenja zemljišta znatno veća kod površinske eksploatacije, gde je prostora degradiran ne samo u konturi rudnika i okoline, već se promene takođe dešavaju u prirodnom okruženju. U članku su predstavljeni rezultati studije zakonskih okvira rekultivacije u nekim zemljama sveta i u Srbiji. Praktično iskustvo rekultivacije pokazalo je da iskorišćenje i devastacija tokom rudarske aktivnosti predstavljaju opasnost ne samo za pogođena ...
    rekultivacija, melioracija, otkopavanje uglja, zakonska regulativa
    ... Conservation Act (EPBC 1999) provides a uniform national framework for the environmental impact assessment of new projects. The largest share of control of the mining industry, including mine closure and recultivation, belongs to the Ministry of Minerals and Energy. GERMANY In Germany, according ...
    ... Management, - _ Lawon Environmental Impact Assessment, - _ Lawon Strategic Environmental Impact Assessment, - _ Lawon Integrated Prevention and Control of Environmental Pollution. Legal and physical entity who use natural resources are obliged to keep up to date during the execution of works and ...

  • 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

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

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... Responsibility for hygienic control of the drinking water quality in Serbia rests under the local Institutes for Public Health. The control is conducted in compliance with the Regulation on hygienic regularity of quality of drinking water (OG FRY No. 42/1998). The control of the surface water quality ...
    ... Strategic Environmental Impact Assessment, Law on Environmental Impact Assessment, Law on Integrated Prevention and Control of Pollution, Law on Integrated Prevention and Control of Pollution, Law on Packaging and Packaging Waste Management, Waste catalogue — instruction to define index number ...
    ... concentrations of the basil water extract have been observed, 25, 50 and 100%. The control was without extract. The influence of three concentrations of essential oil of herb basil has been observed, too, O (control), 59 and 100%. The content of chlorophyll of the species Abufilon theophrasti and ...

  • Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma

    Jasna Mihailović, Ljubomir Stefanović, Ranka Stanković (2013)
    ... therapy but were lost to follow-up were excluded from this study. Patients were selected and staged according to the Union for International Cancer Control (IUCC) 7th edition of TNM classi- fication.25 Patients’ categorization into risk groups was made ac- cording to the pathologist’s reports and the 2006 ...
    ... sampling. Those pa- tients who underwent initial treatment in our institution were treated according to the protocol of diagnostics, treatment, and control of malignant thyroid tumors.26 This protocol suggests that all DTC patients including DTM should be treated with total thyroidectomy followed by RAI ...
    ... West Sussex, England: Blackwell Publishing; 2010:58Y62. 26. Stefanovic LJ, Guduric B, Sljapic N, et al. Protocols of diagnostics, treatment and control of malignant thyroid tumors at the Institute of Oncology in Sremska Kamenica (in Serbian). Oncol Arch. 1994;2:101Y107. 27. Pellegriti G, Scollo C ...

  • Coal homogenization stockyard sizing “Tamnava – Zapad” case study

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)
    ... a stockpile as a grid of voxels (octants), associated with machine operations.Their 3D quality embedded model can be used to calculate, plan, control and predict the quality of ore being stacked and/or reclaimed with a great degree of accuracy. Robinson (2004) presents mathematical and computer ...
    ... Publishing. 8. Stevanović D., Kolonja B., Stanković R., Knežević D., Jovanović M., “Application of stochastic models for mine planning and coal quality control”, ISSN 0354-9836, Thermal science, Vol. 18., No. 4, 2014, pp.1361-1372, DOI: 10.2298/TSCI130201031S 9. Zhao, S., Lu, T.F., Koch, B. and Hurdsman ...

  • Аnaliza mogućnosti povećanja nagiba završne kosine površinskog kopa “Podbraćan”

    Vladimir Čebašek, Veljko Rupar (2018)
    Eksploatacijom boksita iz ležišta "Podbraćan" formiran je površinski kop sa maksimalnom visinom zavšne kosine od 280 m. Redovnom kontrolom stabilnosti trenutnog stanja kosina površinskog kopa utvrđeno je da faktor sigurnosti iznosi Fs = 1.71 – 1.85, a što je ukazalo da postoji mogućnost povećanja nagiba kosine. U radu je prikazan postupak analize mogućnosti povećanja nagiba završne kosine površinskog kopa "Podbraćan".
    stabilnost kosina, povećanje nagiba kosina, metoda konačnih elemenata

  • 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 ...
    data mining, information extraction, emotions, text on the web
    ... on Based on Emoticons”, pp. 67–91 Under an assumption that reducing all possible parameters onto polar- ity, there isn’t a significant information loss and that the machine can decide between multiple choices using a single parameter, task is reduced to deter- mination of what is positive and what is ...
    ... options are activated by pressing the appropriate buttons located on the bottom of the screen (Figure 5). In both cases, due to possible irreversible data loss, the user will need to confirm the process in an additional dialog box that will appear on the screen. Once the user is satisfied with the settings ...

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... sam- ples, may be due to the heterogeneity of the rock mass, 1.e., tested samples. All observed limestones are resistant to frost with the mass loss being less than 2 % after 25 freeze-thaw cycles. All investigated limestones are predominantly hard rocks (Bilbija and Matović 2009). They have ...
    ... after freeze-thaw cycling (G); and d wear abrasive (Hb); legend: K/ klisura, 7S tisnica, S7 struganik, SK skrzut means of abrasion wear (volume loss) that vary from 16.5 to 19.4 cm?/50 cm* (Fig. 4d). The petrographic features of the examined rocks initi- ated the differences of their technical ...

  • Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation

    Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer (2021)
    kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje
    ... material points. A higher spatial resolution of the grid compared to the PIV displacement field can therefore be useful to mitigate progressive resolution loss in regions with large cumulative extension. The procedure assumes that the PIV-derived velocities do not contain outliers. In this study we remove ...
    ... displacements, while applying PIV not strictly sequential. In this PIV approach, the reference image is not updated every time step, but only when the loss cross-correlation, due to cumulative deformation, is becoming too large. Such an approach would also allow for mitigating displacement data gaps. ...
    ... resolution of the derived deformation fields, as extensional or shortening stretches have opposite effects on the grid side lengths. To prevent overly loss of spatial resolution in extensional areas (including shear zones) we have implemented an homogeneous grid refinement with respect to the resolution ...

  • A Description of Morphological Features of Serbian: a Revision using Feature System Declaration

    Cvetana Krstev, Ranka Stanković, Vitas Duško (2010)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    Morphology, Lexicon, lexical database, Standards for LRs
    ... attributes or attribute values, explicit statement of valid combinations of attribute and values. We expect that our description will transform without loss of information in the new version of MULTEXT-East format. 7. References Courtois, B. and Silberztein, M. (eds.) (1990). Dictionnaires électroniques ...

  • Conversion of land areas after coal mine closure and reclamation

    Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić (2023)
    Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.
    rekultivacija, melioracija, revitalizacija, otkopavanje uglja, održivi razvoj
    ... the degradation of agricultural lands. Predictions of the effects on the environment are very important and present the concern in the sense of the loss of surface area and space for living. The study on the environment has a basic description of the effects that are expected, and it is a basic document ...

  • Available technological procedures for capturing CO2 in the industrial and power generation sectors

    Lola Tomić, Vesna Karović Maričić, Dušan Danilović, Branko Leković, Miroslav Crnogorac (2021)
    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 ...
    capturing CO2, power plants, CO2 capture systems, CO2 technologies
    ... its high CO2 capture efficiency and small capital and operational investments which reduce costs [23,29]. This process is fully automated, easy to control and operate [29]. Membrane technology has great potential for capturing CO2 from different gas streams such as: CO2/H2 separation in pre-combustion ...
    ... other technologies due to its high CO2 capture efficiency and small capital and operational investments, and this process is fully automated, easy to control and operate. 255 REFERENCES 1. IEA. Global Energy Review 2021, Assessing the effects of economic recoveries on global energy ...

  • Srbija u OneGeology Europe

    Danka Blagojević, Ranka Stanković, Petar Stejić, Velizar Nikolić (2014)
    Геолошки завод Србије као носилац Пројекта ОneGeologyEurope заједно са Рударско геолошким факултетом и Министарством за природне ресурсе, рударство и просторно планирање су се укључили у међународни Пројекат OneGeology Europe у мају 2013. године у већ поодмаклој фази израде Пројекта. До краја 2013. године испунили су завршене активности које треба да доведу до пуноправног укључења у Пројекат чиме је Република Србија нашла своје место на Геолошкој карти Европе 1:1М. Геолошка карта Србије 1:1М представља компилациону односно поједностављену верзију ОГК 1:500 ...
    OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем
    ... and coverage data. SLD addresses the need for users and software to be able to control the visual portrayal of the geospatial data. SLD provides the users: people and software agents (web services) the chance to control the visual display of the geospatial data. For the purpose of these maps, 1G ...
    ... feature and coverage data. SLD addresses the need for users and software to be able to control the visual portrayal of the geospatial data. SLD provides the users: people and software agents (web services) the chance to control the visual display of the geospatial data. For the purpose of these maps, 1G styles ...

  • 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

  • A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

    Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...
    Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenika

  • Izdvajanje vode iz prirodnog gasa

    Dejan Nedeljkov (2024)
    U radu je istaknuto važnost prirodnog gasa kao vitalna komponenta svetske energetike.Spada u najsigurnije,najčistije i najkorisnije fosilno gorivo. Sama pojava vode u vidu vlage u gasu je pokazatelj lošeg kvaliteta gasa. parametri koji mogu dovesti do lošeg kvaliteta prirodnog gasa kao pokazatelj je Wobbe index.U okviru istraživanja u master radu glavni problem funkcionisanja na KPG Paliću predstavlja vlaga u gasu,takođe se može zaključiti da kvalitet gasa zavisi od Wobbe indeksa odnosno, što je Wobbe veći, čistiji je gas, ili ...
    prirodni gas, separatori, separacija, grejači, čileri, tačka rose, Wobbe indeks
    ... delle machine operatrici per il transporto di idrocarburi liqidi o gassoso lungo uno pipeline,S.P.A, MILAN, 1970., str.68 ? F.A.Inkley: Oil loss control in the petroleum industry the Institut of Petroleum, London, 1985., str. 43 11 5.2. Separacija gasa Krajnja faza separacije odvija se u ...
    ... delle machine operatrici per il transporto di idrocarburi liqidi o gassoso lungo uno pipeline,S.P.A, MILAN, 1970. godine [15] F.A.Inkley: Oil loss control in the petroleum industry the Institut of Petroleum, London, 1985. godine [16] Bill Smith, C.E. Crest: Design of heavy crude facilities exipored ...
    ... se sabiraju fluidi iz bušotina sa gravitacionog područja stanice i gde se obavlja razdvajanje i merenje fluida i njihovo otpremanje do sabirno – otpremne stanice, gde se obavlja priprema, skladišteje i transport. To znači da sabino-merne stanice ne poseduju sisteme za pripremu fluida, kao i za ...