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Упит dcterms_creator_txt:Bechtel A. Gawlick Hans Jurgen

1601 items

  • Design and drilling of wells in formations with high pressure

    Vojin Solomun (2024)
    Objectives of this Thesis are to: - Develop an awareness of the challenges presented from elevated temperatures and pressures in well construction. - Learn the key differences between ―normal‖ condition wells and HPHT wells. - Understand some of the indicators of thermal- and pressure-related problems. - Understand the responses which may be made to mitigate high pressure and high temperature ,,HPHT‘‘ challenges while drilling wells. HPHT wells are an unavoidable consequence of the ever expanding search for oil and gas resources around the world. As wells are ...
    HPHT, well, challenges, design, oil and gas
    ... (350*F) on the seafloor for a well with a subsea wellhead or at the surface for a well with a surface wellhead. Institute of Petroleum: anticipated surface pressure requiring pressure control equipment with a rated working pressure in excess of 690 bar (10,000 psi). APLU: a potential pressure greater ...
    ... 1035 bar (15,000 psi) or a temperature rating greater than 177"C (350%F); (2) The maximum anticipated surface pressure or shut-in tubing pressure is greater than 1035 bar (15,000 psi) on the seafloor for a well with a subsea wellhead or at the surface for a well with a surface wellhead; or (3) ...
    ... KL ' - aMa nootms 1 AA A M Sebi I ' NI R. NBJ —: ! A leA f svayaco | iii KOyAy a A N . VO JO ' ___ Bg AODR O, _ peuvNi - lla PEĆAT || s oO AM y ' - i Ultra HP/HT \ š 177 H ž· -1 || š AAconevi H Š 15 s || Š g EOM % puwoeva OkEP :i! Agreao 46 ”ER rs Ćl ı 100 A | Š š ši FBI Totaš Operator ...

  • Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)

    Pavle Tančić, Aleksandar Kremenović, Predrag Vulić (2019)
    In this paper, grandite core with Grs64±1Adr36±1Sps2composition was crystallographically studied. This core represents zone A of the macroscopically visiblefive A–E zones of the optically anisotropic Grs58–64 Adr36–42Sps2 grandite. The applied procedure includes the detailed analysis of the powder diffraction patterns, and the Rietveld refinements of the crystal structures in a series of 18 space groups and two mixtures, which were followed by the comparative analysis of the R-values, site occupancy factors, and the bond lengths and angles. Synthesis of all ...
    grandite, XRPD, crystal structure, structural dissymmetrization

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... required to compare Mi and Mo. The degree of possibility of a convex triangular fuzzy number, so that it is greater than k of convex fuzzy number M, where i = 1,2,..., k, can be defined . other as V(M > Mi,Wb,.... My) = V|(M > Mi)A(M > M»)A·--A(M > M)} = minV(M > Mi). Summing; everything; up yields ...
    ... (4i),C(A>),...,“ (An)T) where A4;(i= 1,2,...,n). 1416 M. Čelebić, S. Bajić, D. Bajić et al. Step 5. The final weights are calculated applying; a matrix algebra approach, namely the additive normalization method [11]. 'The result is a normalized weight priority vector in the form of a non-fuzzy ...
    ... comparing, decisions. The proposed method makes use of a logical approach of the expert to create a problem hierarchy (objective > criteria > alternatives). A special application, Fuzzy-GQWOS, has been developed to facilitate decision making with a fuzzy optimization model. Scores are entered and pairs ...

  • Nonequilibrium athermal random-field Ising model on hexagonal lattices

    Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević (2021)
    Изингов модел, хексагонална решетка
    ... RANDOM-FIELD ISING ... PHYSICAL REVIEW E 103, 032147 (2021) (a) L=32768 L=1024 * regular system =| regular system preset interface * preset interface size 100 size 100 v preset interface °* preset interface . size 32768 size 1024 ~ ‘a = a . a . a a mie C2 bee eee ES 0.4 0.6 0.8 (b) L=32768 L=1024 * regular ...
    ... evolution of those systems. A. Avalanche propagation for a given value of external field In the previous section we showed that there is a spe- cific condition for appearing of the biggest avalanches which holds in a wide range of disorders starting from zero up to a 5 5 i} i=} i} i=} i} i} 0.3+ f=16 ...
    ... some regularities in the evolution of those systems. A. Avalanche propagation for a given value of external field In the previous section we showed that there is a spe- cific condition for appearing of the biggest avalanches which holds in a wide range of disorders starting from zero up to FIG. ...

  • Comparative analysis of correlation coefficients in mineralogical and geophysical data from the mine tailing site “Rudnik” (Serbia)

    Vesna Cvetkov, Filip Arnaut, Dragana Životić (2024)

  • Појава НИМБИ синдрома међу становништвом Лознице и околине услед планираних рударских активности

    Сара Арсенић (2024)
    Рад обрађује историјски развој нимбизма, његову анализу, природе и димензије, и његово превазилажење. Анализа се фокусира на планиране рударске активности у околини Лознице и њихов утицај на ставове локалног као и околног становништва и стручне јавности укључујући резултате испитивања јавног мњења кроз анкету. Анкета садржи тринаест питања и рађена је за три групе: становници Београда и околине, Лозница и оклоина и стручна јавност. Такође се и разматра како се различити политички и еколошки фактори манифестују у овом контексту, као ...
    нимби синдром, пројекат „Јадар“, отварање рудника, анкетирање јавног мњења
    ... OKOJIHHC} a aeananaoaoeot 68 Cmaka 65: IIpaukaa pe3ynrara Ha narampe „ Jla na OB oTrBapaPĐe py}HMHKa JOOHCJIO HeKC KOPpHCTH JIp?KaBH? al a aaaaaaaao a aaa a oaea a aaoaaataaaoaaaatatot 69 Cmaka 66: IIpaka3 peyyrrara Ha marame „, Ha koju HauiH OH cTaHOBHHIITBO TpeOajo Ja yTHue Ha paji pyyiHHKa" a an ...
    ... Cka 1: IIpBa crpaHa aHKeTE lyy aaaaaa a eaaaaaaaaaaaaaaaaoatttt 20 Cuka 2: Jipyra crpaHa aHKeTe.aaaaa a aaea a aaaaaataaoaatatt 21 Cmaka 3: Tpeha crpaHa aHKeTe al anaaaaaaoaaaaaoaaaaaeaaaaaaatatatet 22 Cuaka 4: Uerpra crpaHa aHKETE lyy aaa a aaaaaaaae a aaaaaaaaaaaoaattoot 23 Cmaka 5: IHojt ...
    ... Jla na OB oTrBapaPĐe py}HHMHKa JIOHCJIO HeKC KOPpHCTH JIp?KaBH? al a aaaaaaaao a aaa a oaea a aaoaaataaaoaaaatatot 76 Cmaka 75: IIpaka3 peyynrrara Ha marame „, Ha koju HauiH OH cTaHOBHHIITBO TpeOajo Ja yTHue Ha paji pyyiHHKa" a ananaanaaaoaeaaoaaaeaaaaaaaeaaaaaaaettttt 77 Cahnpxaj 1 h/:1 VAAAAAA ...

  • Процена ризика од удеса на флотацијском јаловишту "Ваља Фундата

    Милица Илиевски (2024)
    У овом завршном раду под називом: „Процена ризика од удеса на флоатацијском јаловишту „Ваља Фундата““ кроз 8 поглавља описане су примењене методе за управљање флотацијском јаловином, као и могући сценарији удеса који могу настати услед нестабилности брана или природних катастрофа.Рад користи технике попут FMEA и ALARP за анализу ризика, при чему се ризик дефинише као функција вероватноће и последица инцидента.Препоручене су мере за смањење ризика и унапређење стабилности брана,укључујући редовно одржавање и надградњу инфраструктуре.Резултати рада указују да је ризик ...
    флотацијска јаловина, процена ризика, рушење бране, удеси, еколошке последице
    ... pH3HK n AHajn3a pH3HKa ||·mopu3m<a 1,2,3..n TI ip on eH a p H 3 H K a ||| ynopeljsanbe HHBOa pH5HKa 1, 2, 3...n ca npeTxojHo ne(HHHCaHHM KpHTepHjyMHMa Cnuka 2.3. IIpouec npouyene pu3uka ca K/byuHuM Kopauyu.Ma u Ibuxo6uM ucxoOua |2] OnBaj nocrynak oMoryhana a ce pa3yMe npupojna pH3HKa, ĐeroOBH ...
    ... ms Kareropvja A Canuka 6.5. KnacudQukauuja (onomauujcko2 janoguuma npeMa puxuuHocmu y cnyuajy nponoMa – N V T E P A U M J A Vihaanaatrenr M TpajHo apyu:eo 3Apatibe nmya 0pana „Kanybepuua “ unu „IIycmutbau 2“ [5] 47 Munuua Hnueecku P1I11/18 JIpouena pu3uka oO yOeca a Qnomauujckou Janosuumy ...
    ... mpomueHe pH3HKa y peaJiHOM OKPy)KOHyaaaaa a aaaanaacee 12 2.7. VrpaBJbabe pH3HKOM pyImeFba OpaHa lı aaaaaaanaaaaaaati 14 2.8. Mepe cy3Oujaba pH3BMKa.aaaaaaaa a aaaaaaeaaaaaakataoe 15 2.9. VjecH Ha NemoHHJaMa HHJIyCTDpHJCKOT OTHaJIA ... 16 2.10. CiteHapo y/eCa a aaaaaaaaaaaaaaaaaaaaaaaaaaeaaaataeoteVt ...

  • Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi – criteria optimization

    Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek (2024)
    višekriterijumska optimizacija, definisanje kriterijuma, podzemna eksploatacija

  • Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi: Criteria optimization, Belgrade, June 2024

    Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek (2024)
    multi-criteria decision-making, definition of criteria, underground exploitation

  • From DELA Based Dictionary to Leximirka Lexical Database

    Biljana Lazić, Mihailo Škorić (2020)
    In this paper, we will present an approach in transforming Serbian language Morphological dictionaries from a DELA text format to a lexical database dubbed Leximirka. Considering the benefits of storing data within a database when compared to storing them in textual documents, we will outline some of the functionality that the database has made possible. We will also show how hand-made rules that use category labels lexical entries are marked with can be used to link lexical entries. ...
    Morfološki rečnici, jezički resursi, Leksimirka

  • E-Connecting Balkan Languages

    Cvetana Krstev, Ranka Stanković, Duško Vitas, Svetla Koeva (2009)
    In this paper we present a versatile language processing tool that can be successfully used for many Balkan languages. This tool relies for its work on several sophisticated textual and lexical resources that were developed for most of Balkan languages. These resources are based on several de facto standards in natural language processing.
    Query expansion, e-dictionary, wordnet, proper name, aligned text

  • An oilfield in Libya: A new model to enhance waste water disposal

    Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković (2016)
    нафта, лежишне воде, припрема
    ... is carried out, but with a much smaller volume of produced water. The reservoir water from storage tank R-4 is routed through a buffer tank to coalescing filter with a hydrophobic medium. Treatment of waste water is done in the separator, using Coalescing filter with a hydrophobic filter medium ...
    ... An oilfield in Libya: A new model to enhance waste water disposal Dusan S Danilovic, Vesna D Karovic Maricic, Nori EA Elhaddad and Branko A Lekovic Abstract The water produced at the Amal oil field in Libya is directly stored for evaporation in in-ground- pits. As there are a large number of oil ...
    ... pits. As there are a large number of oil production wells, there is a potential risk of environmental pollution because of the waste water’s eventual penetration into subsoil and surface waterways. Furthermore, water production is expected to increase in the Amal oil field. From a technical point of ...

  • Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept

    Uroš Đurić, Miloš Marjanović, Zoran Radić, Biljana Abolmasov (2019)
    Improvements of Machine Learning-based landslide prediction models can be made by optimizing scale, customizing training samples to provide sets with the best examples, feature selection, etc. Herein, a novel approach, named Cross-Scaling, is proposed that includes the mixing of training and testing set resolutions. Hypothetically, training on a coarser resolution dataset and testing the model on a finer resolution should help the algorithm to better generalize ambiguous examples of landslide classes and yield fewer over/underestimations in the model. This ...
    klizišta, podložnost, mašinsko učenje
    ... e., stable ground, dormant landslide and active landslide). A function fc:P→Q is called a classifi- cation function if for each x∈P it maps fc(x) = q whenever a pixel x belongs to the class q∈Q. To develop such a classification function, a training set of m labelled pairs (x, q) I, i= 1, …,m must be ...
    ... effects and a cross-scaling concept Uroš Đurića,⁎, Miloš Marjanovićb, Zoran Radića, Biljana Abolmasovb a University of Belgrade, Faculty of Civil Engineering, Bulevar Kralja Aleksandra 73/1, Serbia b University of Belgrade, Faculty of Mining and Geology, Đušina 7, Serbia A B S T R A C T Improvements ...
    ... arbitrarily, while K was set to default as a function of the number of the input predictors (Fig. 7). CrSc principally implies training on a coarser dataset and testing on a finer resolution dataset. The idea is to make the learning function generalize better. Namely, a common problem in ML-based LSA is the ...

  • Using Metadata For Content Indexing Within An OER Network

    Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)

  • Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking

    Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović (2024)
    Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...
    non-detonating, chemical mixture, rock breaking, borehole pressure

  • SrpELTeC: A Serbian Literary Corpus for Distant Reading

    Ranka Stanković, Cvetana Krstev, Duško Vitas (2024)
    U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...
    digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analytics

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)

  • Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications

    Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалима

  • Development of an Integrated Model for Open-Pit-Mine Discontinuous Haulage System Optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević, Dejan Stevanović (2024)
    The selection of the optimal equipment for discontinuous haulage systems is one of the most important decisions that need to be made when an open-pit mine is designed. There are a number of influencing factors, including natural (geological and environmental), technical, economic, and social. Some of them can be expressed numerically, in certain units of measure, while others are descriptive and can be stated by linguistic variables depending on the circumstances of the project. These factors are characterized by ...
    rudarska mehanizacija, znanje eksperta, lingvističke varijable, FAHP