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    Wyświetlanie 1-5 z 5
    Tytuł:
    Influence of grinding methods on the preparation of ultra-clean coal from slime
    Autorzy:
    Wang, Ruiyang
    Gao, Liang
    Liu, Wenli
    Zhuo, Qiming
    Powiązania:
    https://bibliotekanauki.pl/articles/2175430.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ultra-clean coal
    grinding method
    interaction energy
    flotation
    Opis:
    This study discusses the technology of coal slime recovery for preparing ultra-clean coal (UCC). X-ray diffraction analysis (XRD) and scanning electron microscopy combined with energy dispersive spectroscopy (SEM-EDS) were used to analyze the characteristics of coal slime and to explore the types of minerals and embedded characteristics of coal slime. The particle interaction energy and contact angle analysis were used to determine the UCC preparation process through dry and wet grinding dissociation comparison and shear flocculation flotation tests, combined with zeta potential measurements. The results showed that the inorganic minerals in the slime were mainly kaolinite clay minerals, which were easy to mud in the pulp and needed grinding. The calculation results of the interaction energy indicated that the interaction force of dry-ground slime in the pulp was small, and flocculation was more likely to occur. The wet-ground product was subjected to three flotations to obtain UCC with an ash content of 0.95%.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 151957
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the construction of the system for forensic psycholinguistics
    Autorzy:
    Yang, Shaogang
    Liu, Zhuo
    Powiązania:
    https://bibliotekanauki.pl/articles/950308.pdf
    Data publikacji:
    2019-06-02
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    forensic psycholinguistics
    linguistic behavior
    theoretical
    system
    Opis:
    Forensic psycholinguistics is an emerging interdisciplinary subject that makes use of the psychological methods to analyze the linguistic phenomena in legal activities and therefore it is of the multiple and cross-disciplinary nature. In ancient Chinese culture there were written expressions with thoughts of forensic psycholinguistics and its practices. In Western countries the research started from European societies at the end of 19th century when Münsterberg and Cattell and some other scholars acted as the pioneers of this domain. After the WWII the research center of forensic psycholinguistics gradually moved to the United States where the research of legal psychology and the use of psychological methods greatly facilitate the study and practices of forensic psycholinguistics. Its study object aims at the linguistic behavior in such legal activities as legislation, judicial, the obeying of the law and transgression, and its task should be the research on the behavior of the legal language in both levels of consciousness and unconsciousness. The construction of the system for forensic psycholinguistics should start from the perspectives of linguistic psychology of legislation, judicial, the enforcement and obeying of the law and the legal publicity so that a cross-cultural emerging subject with its values of practical application could be created.
    Źródło:
    Filozofia Publiczna i Edukacja Demokratyczna; 2019, 8, 1; 109-127
    2299-1875
    Pojawia się w:
    Filozofia Publiczna i Edukacja Demokratyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A coordinated optimization of rewarded users and employees in relocating station-based shared electric vehicles
    Autorzy:
    Yu, Lan
    Liu, Jiaming
    Sun, Zhuo
    Powiązania:
    https://bibliotekanauki.pl/articles/2172124.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    shared electric vehicle
    user reward mechanism
    collaborative relocating
    SCE–UA
    wspólny pojazd elektryczny
    mechanizm nagradzania użytkowników
    Opis:
    To solve the mismatch between the supply and demand of shared electric vehicles (SEVs) caused by the uneven distribution of SEVs in space and time, an SEV relocating optimization model is designed based on a reward mechanism. The aim of the model is to achieve a cost-minimized rebalancing of the SEV system. Users are guided to attend the relocating SEVs by a reward mechanism, and employees can continuously relocate multiple SEVs before returning to the supply site. The optimization problem is solved by a heuristic column generation algorithm, in which the driving routes of employees are added into a pool by column generation iteratively. In the pricing subproblem of column generation, the Shuffled Complex Evolution–University of Arizona (SCE–UA) is designed to generate a driving route. The proposed model is verified with the actual data of the Dalian city. The results show that our model can reduce the total cost of relocating and improve the service efficiency.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2022, 32, 4; 523--535
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of chromatographic plate theory on the weathered crust elution-deposited rare earth ore with carboxylate
    Autorzy:
    Zhang, Zhenyue
    Wang, Guangshuai
    Li, Chunhua
    Chi, Ruan
    Long, Fei
    Chen, Zhuo
    Chi, Xiao Wang
    Liu, Defeng
    Powiązania:
    https://bibliotekanauki.pl/articles/1446022.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    weathered crust elution-deposited rare earth ore
    carboxylate ammonium
    mass transfer
    theory plate
    rare earth
    Opis:
    To improve the leaching process of rare earth and reduce the impurities in the leachate, the carboxylate ammonium, such as ammonium acetate, ammonium citrate and ammonium tartrate, were selected as lixiviant to compare the effects of concentration, flow rate, pH and temperature on leaching mass process of rare earth and aluminum. Meanwhile, the leaching behaviors of rare earth and aluminum leached by three kinds of carboxylate ammonium were analyzed by chromatographic plate theory. The relationship between the flow rate and height equivalent (HETP) could fit well with the Van Deemter equation and there was an optimal flow rate (uopt) for the leaching of the rare earth and aluminum. Besides, the conditions of carboxylate ammonium lixiviant were optimized. The optimum concentrations of ammonium acetate, ammonium tartrate and ammonium citrate were 15 g/L, 25 g/L and 5 g/L respectively, the leaching flow rate was 0.50 mL/min, the pH value was approximatively 7.00 and the leaching temperature was 293 K to 303 K. At these conditions, the mass transfer efficiencies of three ammonium carboxylates for rare earth and aluminum was in the order of ammonium acetate > ammonium tartrate > ammonium citrate. Moreover, the ammonium acetate could commendably inhibit aluminum ions entering the lixivium.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2021, 57, 4; 48-62
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seepage process on weathered crust elution-deposited rare earth ores with ammonium carboxylate solution
    Autorzy:
    Zou, Hualiang
    Zhang, Zhenyue
    Chen, Zhuo
    Liu, Defeng
    Chai, Xiuwei
    Zhang, Han
    Chi, Ru-an
    Powiązania:
    https://bibliotekanauki.pl/articles/1449672.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    permeability
    weathered crust elution-deposited rare earth ore
    ammonium carboxylate
    hydrodynamics
    Opis:
    In order to reveal the seepage law of ammonium carboxylate solution in the in-situ leaching process of weathered crust elution-deposited rare earth ores, the effects of concentration, pH, temperature, particle size and porosity on permeability were discussed in this paper. The results shown that the seepage of the leaching agent solutions in the rare earth ore follows Darcy's law and displays a laminar flow under the conditions of this experiment and seepage velocity can be increased by changing leaching conditions. The permeability coefficients are inversely proportional to concentrations of ammonium acetate, ammonium tartrate and ammonium citrate whose concentration is greater than 0.7wt%, because the insoluble complexes formed by the reaction of ammonium citrate with RE3+ at lower concentration n decrease the permeability coefficient. The permeability coefficients of ammonium carboxylate solutions increase firstly and then decrease with the pH increased. The maximum of permeability coefficients of ammonium acetate, ammonium tartrate and ammonium citrate solution were 2.92, 1.91 and 2.70, respectively, while the pH of solution were 5, 6 and 7, respectively. Increasing temperature is beneficial for the seepage of ammonium carboxylate solution in orebody, therefore, it is helpful for leaching operation in summer. Moreover, clay minerals particle size and porosity are the key factors affecting the permeability of ammonium carboxylate solution in orebody. The permeability coefficients of ammonium acetate, ammonium tartrate and ammonium citrate solutions are 2.92×104cm/s,1.90×10-4cm/s and 2.69×10-4cm/s, respectively, at the same temperature of 293K, original particle size and porosity of the ore. Ammonium acetate solution has the best permeability in orebody.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 1; 89-101
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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