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Упит dcterms_subject_txt:Rastvorne soli

521 items

  • Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine

    Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić (2021)
    The production of lignite in large open-pit mines is mainly performed with continuously operating equipment, where bucket-wheel excavators, bucket-chain excavators, belt conveyors, and spreaders are the basic machines. Smaller machines, usually of discontinuous operating nature, are commonly categorized as auxiliary machines. This paper presents the research related to the analysis of auxiliary machine parameters with the case study for a hydraulic excavator. The purpose of the analysis was to develop a model of rating quality of service of the ...
    Fuzzy theory, hydraulic excavator, selection, quality of service, asset management

  • Fluid inclusion systematics in the Okoška gora polymetallic deposit

    Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec (2021)
    ... Delpinovž 5000 Nova Gorica; martina.stupar(zpsvn.si Varstvo geološke dediščine, njeno prepoznavanje in raziskovanje [ет ог javnosti o pomenu geologije so bili od samega začetka cilji Evropske zveze 22 0 geološke dediščine ProGEO. ProGEO je nevladna organizacija katere člani 0 inštitucije, društva, o ...

  • Природни потенцијал минералних вода Србије - Natural potential of mineral waters in Serbia

    Оливера Крунић (2021)
    минералне воде

  • 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

  • A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach

    Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (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 ...
    fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependability

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... the natural energy of the reservoir, this method of exploitation is called an eruptive method. When the reservoir energy is sufficiently depleted, so that the reservoir pressure is no longer enough to enable the flow of fluid through the well, pipeline, and surface equipment, when production has ...
    ... cylinder is connected to the tubing and installed in the well as an integrated part. The cylinder of an insert pump is a component ofthe pump itself, so insert pumps are installed or removed from the well completely (cylinder with piston) independently of the tubing string, allowing for partial r ...
    ... solutions, makes this type of pump adaptable to different exploitation conditions. Compared to tubing pumps, the piston and cylinder are smaller in size, so the capacity of insert pumps is lower than that oftubing pumps. |[5] 17 The operation of the pump is achieved through the movement of the piston ...

  • Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera

    Aleksandra B. Kolarski (2016-08-25)
    Radio talasi vrlo niskih frekvencija VLF (eng. Very Low Frequency) frekventnog opsega od 3 do 30 kHz, koji se prostiru talasovodom Zemlja-jonosfera (50 -90 km) su, kao što je poznato, efikasni i nezamenljivi u osmatranju pojava u niskoj jonosferi, sa tla...
    prostiranje talasa vrlo niskih frekvencija, talasovod Zemlja-jonosfera, globalno električno kolo, atmosfersko električno pražnjenje, kratkotrajne svetlosne pojave
    ... and climate change. J. Atmos. Sol.-Terr. Phys., 62, pp.1563-1576. São Sabbas, F. T., Sentman, D. D., Wescott, E. M., Jr., Pinto, O. P., Jr., Mendes, O., Taylor, M. J. (2003). Statistical analysis of space time relationships between sprites and lightning. J. Atmos. Sol.-Terr. Phys., 65, pp. 525–535 ...
    ... n After Solar X- Flares Occurrence, Therm. Sci., 9, pp. 299-309. Baker, D. N. (2000). Effects of the Sun on the Earth’s environment. J. Atmos. Sol.-Terr. Phys., 62, pp. 1669-1681. Barrington-Leigh, C. P., Inan, U. S., Stanley, M. (2001). Identification of sprites and elves with intensified video ...
    ... Rycroft, M. J. (2001). Non-uniform ionisation of the upper atmosphere due to the electromagnetic pulse from a horizontal lightning discharge. J. Atmos. Sol.-Terr. Phys., 63, pp. 559–580. Cohen, M., Cotts, B. (2009). Lightning Activity. IHY Workshop on Advancing VLF through the Global AWESOME Network ...

  • Production information system of the Pljevlja coal mine

    Božo Kolonja, Ranka Stanković, Filip Vuković (2018)

  • A contribution to the knowledge of facial diversity of Badenian sediments in the Belgrade area

    Filip Anđelković, Dejan Radivojević (2018)
    baden, Beograd, facije, facijalna raznovrsnost, sedimenti
    ...  1989b).     MATERIAL AND METHODS    The  fieldwork  that  had been  carried  out  in  the Belgrade  area  studied  two  facies:  Tašmajdan  limestones  (so  called  „Leitherkalk“  (Gruber,  1988)  or  „Leitha  limestones“)  and  Rakovica  clastic  sedi‐ ments (sands and conglomerates). There are two add ...

  • English for Geology Students. 2

    Lidija Beko (2023)
    Engleski jezik
    ... students 1. Realizing that some teachers may prefer to structure their courses differently, we have made it such a way that each chapter is independent, so that they could be taught even in a differ- ent order that the one offered in the book. Therefore, teachers can combine the previous textbook with ...

  • English for Geology Students. 1

    Lidija Beko (2023)
    Engleski jezik
    ... was only accessible due to the pumping equipment used by the mining company. In 2015, the Cave was allowed to flood when mining operations cease and so the crystals may once again begin to grow! ___ Using the web pages below, and any others you can find, write a description of how selenite crystals ...

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

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... (Chiari et al. 2011 and references therein). The oceanic-derived units consist of a sub-ophiolite melange overthrust by ophiolites with a metamorphic sole at its base. Metamorphic Adria- derived units of the Jadar-Kopaonik-Studenica areas are exposed below the oceanic-derived units (Zelic et al. 2010) ...
    ... country. Naftna Industrija Srbije a.d. (NIS), which was a joint venture between JSC Gazprom Neft of Russia (56.15%) and the government (29.87%), was the sole producer of natural gas, petroleum, and refined petroleum products in Serbia. Lead and zinc production was produced by private companies Farmakom ...
    ... damages resulting, in whole or in part, from the rcaders” use of, or reliance upon, this material. Any parts of this book based on government reports are so indicated and copyright is claimed for those parts to the extent applicable to compilations of such works. Independent verification should be sought ...

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

    Рада Стијовић, Олга Сабо, Ранка Станковић (2017)
    ... фразеолошке јединице које садрже ову лексику, а које, такође, бележи Речник САНУ (прост као пасуљ, прогутати кнедлу, бити у свакој чорби мирођија, солити памет). Формирње синонимских низова – дулечара, бундевара, тиквењак, дулечњек..., па качамак, палента, пура, мамаљуга, макарон, жгањци. 7 У Речнику ...
    ... +Prod производ брашно, ванилин шећер, марципан, џем, чоколада +Course готово јело савијача, куглоф, пире, десерт, качамак, сарма +Ing додатак со, лимунтус, конзерванс, каротен, заслађивач +Meal оброк предјело, роштиљ, закуска, ручак, пикник, чај, гозба +MesApp приближна мера прстохват, кесица ...

  • Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support

    Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović (2017)

  • Determination of Mechanical Properties of Altered Dacite by Laboratory Methods

    Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović (2021)
    This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...
    Geology, Geotechnical Engineering, Engineering Geology
    ... that sanidine and quartz predominate in D. The strength parameters of the rock material are affected mainly by the content and size of quartz crystals. So, as the content of smaller quartz particles increases, the compressive strength increases. In the AD sample, the process of quartz resorption is pronounced ...
    ... study includes laboratory UCS and triaxial tests of the composite specimens consisting of dacite and altered dacite, which have not been investigated so far. In previous studies, to make the composite specimens test results comparable, the intact UCS of each composite specimen (σci UCS) were normalized ...
    ... given by Marinos and Hoek [9], and Marinos [10] (Figure 17). Therefore, applying both of these practical methods for constant mi estimation is justified, so in this way, one can obtain a realistic estimation of the heterogeneous intact rock mass constant mi. The constant mi determined using the procedure ...

  • Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs

    Saša Milanović, Ljiljana Vasić (2021)
    Earth and Planetary Sciences (miscellaneous), Water Science and Technology

  • Surface functional groups and degree of carbonization of selected chars from different processes and feedstock

    Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)
    The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...
    Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS
    ... spatula. The mixture was wetted with electrolyte solu- tion and stirred again. The materials were filled into the sample holders in portions. Therefor, some electrolyte was first poured into the sample holders and then the solid materials were added so that a slight excess ofliquid remained. This mixture ...
    ... "C. Three samples of each char were also analysed for 23 other elements by Inductive Coupled Plasma Optical Emission Spectroscopy (ICP-OES). To do so, 50 mg of sample were mixed with 0.25 g of LiBOx and heated within 3 h to 1000 'C in a muffle furnace. The decomposition was per- formed for 30 min ...
    ... (1.4%) and in addition aluminium (0.91%), sulfur (0.72%) and iron (0.13%). This can be expected for chars made from lignite or peat. Silicon is [ so present in most of the other chars with more than 0.1%. Most of the other additional elements of Table 3 are only present as traces in most of the ...

  • Geotehničko istraživanje terena za potrebe izgradnje mosta „Mihajlo Pupin“ u Zemunu

    Luka Malenov (2024)
    Za potrebe izrade završnog rada na četvrtoj godini Rudarsko-geološkog fakulteta, studijskog programa Geotehnika, pod mentorstvom doc. dr Dušana Berisavljevića, analizirani su parametri dobijeni laboratorijskim ispitivanjima, kao i in-situ istraživanjima terena i ustanovljeni su geotehnički uslovi izgradnje mosta Zemun-Borča. Takođe, izvršeno je određivanje karakterističnih vrednosti geotehničkih parametara, koje se izučava u sklopu obaveznog predmeta u četvrtoj godini: Projektovanje inženjerskogeoloških radova. Detaljna geotehnička istraživanja terena, izveo je Saobraćajni institut CIP iz Beograda, za potrebe izrade Glavnog projekta mosta Mihajlo Pupin preko Dunava, ...
    tlo, most, geotehnički parametri, karakteristične vrednosti geotehničkih parametara
    ... | = | __ | | || a-}_| 3C5 _I } |a| | | } | } |[ | _| ___ _usgasss”aazpsssi ___ |=s | | __ | _= |_ |____2igogizo|zidozias| d| 45.so|M_____ zaoof sn.oe| 1s:sc| ve-so| osos|__+_|_s4_ [_ ss |___|____ | |_____ [zasoggas| zaogoss| _— | |[s | | | }i}s}m} | _I T lel | L | | | | | |_____uaasaac| asenaag| ...
    ... Glinovita prašina — ||__ _ v71.60 _I _E 80 _— Uo _ || _ P 768 73.50 7510 CPT2S-19 NPV/]·ŽŽ@ 73,40 ___ _ || V72.50 CPr5 —| __ _71.30 _71.5 _ _ OMOI m so | __v71,50 I _— __v72410 _O „72.00 60 __ . 7140 - ZS-3 (65.62) _70.10m KOTA MALE VODE ZS-10 (68.70) ZS-12 (67.89) %Au„;l?()šgm Ckd=1.5MPa, - Ck;_šč”#š@x ...
    ... 2010 |KARTIRAO V. Maletić, dipl.ing.geol. KOTA (mnm) ZAVR[ENO 03.05.2010. |CRTAO Luka Malenov 1:100 FaJEE: s Šlo|ž} |MB < z= 5 s o|e ts < F 5 o so olel| T| |. ŠSlms|adloš Pž a|8|z|5|NH S x u |< [ruj u a [=} 5 š% LITOLOŠKI OPIS •)|| Ž Dmu | — ; P š ; 7 mnm'! m | m = = mm| #| m|m | m 0 i ...

  • Geotehničko istraživanje terena za potrebe izgradnje mosta „Mihajlo Pupin“ u Zemunu

    Luka Malenov (2024)
    Za potrebe izrade završnog rada na četvrtoj godini Rudarsko-geološkog fakulteta, studijskog programa Geotehnika, pod mentorstvom doc. dr Dušana Berisavljevića, analizirani su parametri dobijeni laboratorijskim ispitivanjima, kao i in-situ istraživanjima terena i ustanovljeni su geotehnički uslovi izgradnje mosta Zemun-Borča. Takođe, izvršeno je određivanje karakterističnih vrednosti geotehničkih parametara, koje se izučava u sklopu obaveznog predmeta u četvrtoj godini: Projektovanje inženjerskogeoloških radova. Detaljna geotehnička istraživanja terena, izveo je Saobraćajni institut CIP iz Beograda, za potrebe izrade Glavnog projekta mosta Mihajlo Pupin preko Dunava, ...
    tlo, most, geotehnički parametri, karakteristične vrednosti geotehničkih parametara
    ... | = | __ | | || a-}_| 3C5 _I } |a| | | } | } |[ | _| ___ _usgasss”aazpsssi ___ |=s | | __ | _= |_ |____2igogizo|zidozias| d| 45.so|M_____ zaoof sn.oe| 1s:sc| ve-so| osos|__+_|_s4_ [_ ss |___|____ | |_____ [zasoggas| zaogoss| _— | |[s | | | }i}s}m} | _I T lel | L | | | | | |_____uaasaac| asenaag| ...
    ... Glinovita prašina — ||__ _ v71.60 _I _E 80 _— Uo _ || _ P 768 73.50 7510 CPT2S-19 NPV/]·ŽŽ@ 73,40 ___ _ || V72.50 CPr5 —| __ _71.30 _71.5 _ _ OMOI m so | __v71,50 I _— __v72410 _O „72.00 60 __ . 7140 - ZS-3 (65.62) _70.10m KOTA MALE VODE ZS-10 (68.70) ZS-12 (67.89) %Au„;l?()šgm Ckd=1.5MPa, - Ck;_šč”#š@x ...
    ... 2010 |KARTIRAO V. Maletić, dipl.ing.geol. KOTA (mnm) ZAVR[ENO 03.05.2010. |CRTAO Luka Malenov 1:100 FaJEE: s Šlo|ž} |MB < z= 5 s o|e ts < F 5 o so olel| T| |. ŠSlms|adloš Pž a|8|z|5|NH S x u |< [ruj u a [=} 5 š% LITOLOŠKI OPIS •)|| Ž Dmu | — ; P š ; 7 mnm'! m | m = = mm| #| m|m | m 0 i ...

  • Процена емисије гасова са ефектом стаклене баште као последице енергетске активности

    Горана Остојић (2024)
    Рад се бави анализом и проценом емисија гасова са ефектом стаклене баште, са посебним акцентом на емисије које настају као последица енергетских активности. Ефекат стаклене баште представља природни процес који је неопходан за одржавање живота на Земљи, али антропогене активности, попут индустријске производње и сагоревања фосилних горива, значајно повећавају концентрацију ових гасова у атмосфери, што доводи до климатских промена. Рад истражује узроке, последице и могућности за смањење емисија гасова, као и развој стратегија за ублажавање негативних ефеката на животну ...
    емисија гасова, ефекат стаклене баште, енергетске активности, климатске промене, мобилно сагоревање, стационарно сагоревање
    ... CBOTr BHCOKOT cajp:kaja yrJbeHuKa. Kaja ce yraJb caropeBa, ocnoGala BenmKe KonHuHHe CO, Kao H npyre mrTeTHe CyrcTaHTIe, yKJbyuyJyhuM cyMmop-maokcuj (SO>)) H a3oTHe oKcHJe (NOx). 27 Jipouena eMucuje zacosda ca epeKkmoM cmakanene 0aume Kao noceQuue enepoemcke akmuseHocmu OBH TacOBH HC CaMO Ja ...
    ... y TpaHCHOPpTHOM CeKTOpy. CaropeBame Ha(Te ocnmo0aba COp, kao H MerarH (CHa) H Npyra opraHcka HcHMapePa. HadQra rakolje npoM3Bo)H CyMHop-HMoKcHN (SO>) H aaoTHe oKcHe (NOx), kojH Mory MonpHHeTH 3arabeP>y Ba3nyXxa H 3JpaBCTBeHHM rpoOneMuMa. IIopej eMucHja racoBa ca c(DeKTOM cTakKJIeHe Oamrre, e ...
    ... caMO 3a Mepebbe CO> 30o0r BHCOKHX TPOIHIKOBA, aJIH MO)KC ce CIIpoOBecTH aKO Cy MOHHTOPpH Beh HHcTaJmipaHuH 3a Mepebbe HpyruHx aarabaBaua Kao mro cy SO> a NOx. KoHruHyupato rıtpahem• je KOpHCHO 34 CarOpeBabbe uBpCTHX ropHBa rJie Je TeOXe MepHTH IIpOTOK TOpHBa, HJIH Kajia Cy TOpHBa BeOMa BapuHjaOuJHa ...