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    Wyświetlanie 1-8 z 8
    Tytuł:
    Solutions of One-Dimensional Effective Mass Schrödinger Equation for PT-Symmetric Scarf Potential
    Autorzy:
    Zhang, A.
    Shi, P.
    Ling, Y.
    Hua, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492765.pdf
    Data publikacji:
    2011-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    03.65.Fd
    03.65.Ge
    03.65.-w
    Opis:
    The one-dimensional effective mass Schrödinger equation for PT-symmetric Scarf potential is investigated. The analytical expressions of energy eigenvalue and corresponding wave function are presented. They are accomplished by using an appropriate coordinate transformation to map the transformed exactly solvable one-dimensional Schrödinger equation with constant mass into the position-dependent mass equation. In the computation, three different forms of mass distributions are considered.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 6; 987-991
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on the Extrinsic Fabry-Perot Interference (EFPI) technology for optical fiber sensing technology of mine gas
    Technologia EFPI wykrywania obecności gazów przy pomocy specjalnych włókien
    Autorzy:
    Zhou, M. R.
    Dai, H.
    Ling, D. Y.
    Ye, Y. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/348694.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    EFPI
    gaz kopalniany
    czujniki z włóknami optycznymi
    mine gas
    fiber optical sensors
    Opis:
    Along with the expansion of the mining capacity, the mine gas accident is more and more. There are still many shortages and defects in gas monitoring system in the previous gas concentration monitoring method. Therefore, we propose the optical fiber sensing technology of mine gas method based on Extrinsic Fabry-Perot Interferometer (EFPI) technology. According to the analysis of interference spectrum from EFPI fiber optic sensor, the varying information is obtained. Then the concentration of the gas is calculated, by Beer Law and the relations between light intensity and concentration of gas. The method implements the high resolution of optical fiber sensing, and avoids the light interference and so on. This method, which can eliminate all kinds of interference in monitoring gas concentration, is a new method on measuring the concentration of gas at harsh environments under coal mine. It has extremely high security and strong anti-interference capability. The method works well in inflammable and explosive environment, which has an important significance for safety production in the coal.
    Wraz z rozwojem górnictwa w górnictwie występuje coraz więcej wypadków. Obserwuje się wciąż brak lub wadliwe działanie systemów monitorujących zawartość gazów w kopalniach. Dlatego autorzy niniejszej pracy zaproponowali technologię wykrywania obecności gazów przy pomocy specjalnych włókien przy pomocy interferometru Fabry-Perot'a EFPI. Koncentrację gazów oblicza się przy pomocy prawa Beer'a, z zależności pomiędzy intensywnością światła w czujniku optycznym, a stężeniem gazu. Metoda ta pozwala na wdrożenie do górnictwa metod wykrywania gazów przy wykorzystaniu włókien optycznych, wykluczając jednocześnie zjawisko interferencji świetlnej i temu podobnych. Metoda ta, eliminuje wszelkiego rodzaju interferencję w monitorowaniu stężenia gazów jest nowatorską metodą pomiaru stężenia gazów w kopalniach podziemnych. Metoda ta również zapewnia bezpieczeństwo. Metoda ta sprawdza się zarówno w środowisku gdzie nie ma zagrożenia gazowego, jak również w środowisku gdzie mogą wystąpić gazy wybuchowe, co jest bardzo ważne dla zapewnienia bezpieczeństwa pracy przy produkcji węgla.
    Źródło:
    AGH Journal of Mining and Geoengineering; 2012, 36, 3; 501-507
    1732-6702
    Pojawia się w:
    AGH Journal of Mining and Geoengineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on quantifying the hydrophilicity of leached coals by FTIR spectroscopy
    Autorzy:
    Wang, J.
    He, Y.
    Yang, Y.
    Xie, W.
    Ling, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/110191.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    chemical-structural properties
    macerals
    hydrophilicity
    functional group
    Opis:
    Surface properties play important roles in characterization of structural parameters and the hydrophilicity index. Accurate analysis of the macerals rather than the average properties of the macerals and minerals are crucial for these parameters and indexes. In order to improve the accuracy of analyzing coal surface property, HF/HCl acid leaching was applied to eliminate the interference of minerals. FTIR was used to characterize the differences in surface chemical composition between raw and processed coal. Moreover, each functional group was analyzed quantitatively. Based on these quantitative data, the structural parameters and hydrophilicity indexes were calculated. From the results of FTIR, the peaks of mineral cover up the types of the organic peaks, such as -COOH and aromatic CH stretching. In addition, they decrease the intensity of the peak such as C=C and aromatics CHx out-of-plane deformation in the spectra of raw coals. However, it provided the accurate types and contents of organic functional groups of the macerals after acid leaching. The structural parameter results indicate that the values cannot reflect the coal ranks through the surface properties of raw coals while they show a good relationship with the degree of coalification in the analysis of processed coals. Besides, the hydrophilicity indexes are verified by the natural floatability of coal macerals of the processed coals. It is also found that the processed lignite coal cannot be floated despite elimination of the hydrophilic minerals. The main reason of hard-to-float property of lignite coal lies in a strong hydrophilicity of macerals.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 1; 227-239
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enrichment, Separation, and Recovery of Phosphorus from Dephosphorization Slag
    Autorzy:
    Yan-Ling, Z.
    Ming, G.
    Feng-Shan, L.
    Kan, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/354800.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    phosphorus enrichment
    selective enrichment and growth
    P-rich phase
    magnetic separation
    Opis:
    A better understanding of phosphorus distribution in slag is necessary to develop an effective way to treat dephosphorization slag formed during steelmaking. Here, previous studies on the enrichment, separation, and recovery of phosphorus from dephosphorization slag are reviewed, along with their influencing factors. The results suggest that a proper heat treatment can promote the selective enrichment and growth of P-rich phases. Further, adding P2O5 and FetO facilitates phosphorus enrichment. Also, Ca3(PO4)2 is precipitated from slag containing 18 wt% P2O5. MnO and MgO in the slag barely affect the phosphorus recovery. In contrast, the addition of Al2O3 and TiO2 significantly affects phosphorus enrichment and magnetic separation. A phosphorus recovery rate of more than 70% is achieved with the addition of 10 wt% Al2O3 or 10 wt% TiO2. New phases (Na2Ca4(PO4)2SiO4, Na3PO4, and Ca5(PO4)3F) tend to be formed on the addition of Na2O and CaF2, which promote phosphorus enrichment. However, the addition of Na2O and CaF2 results in the incomplete separation of phosphorus and iron, as CaF2 and Na2O improve slag metallization and the magnetism of iron-rich phases.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1769-1783
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimized design of a high-power-density PM-assisted synchronous reluctance machine with ferrite magnets for electric vehicles
    Autorzy:
    Liu, X.
    Li, Y.
    Liu, Z.
    Ling, T.
    Luo, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/140849.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    permanent magnet (PM)-assisted synchronous reluctance machine
    ferrite magnet
    demagnetization
    mechanical strength
    torque ripple
    finite element analysis
    Opis:
    This paper proposes a permanent magnet (PM)-assisted synchronous reluctance machine (PMASynRM) using ferrite magnets with the same power density as rareearth PM synchronous motors employed in Toyota Prius 2010. A suitable rotor structure for high torque density and high power density is discussed with respect to the demagnetization of ferrite magnets, mechanical strength and torque ripple. Some electromagnetic characteristics including torque, output power, loss and efficiency are calculated by 2-D finite element analysis (FEA). The analysis results show that a high power density and high efficiency of PMASynRM are obtained by using ferrite magnets.
    Źródło:
    Archives of Electrical Engineering; 2017, 66, 2; 279-293
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorption behavior of surfactants on lignite particles with different densities in aqueous medium
    Autorzy:
    Wang, J.
    He, Y.
    Wen, B.
    Ling, X.
    Xie, W.
    Wang, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/110538.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    interfacial surface free energy
    adsorption
    lignite
    surfactant
    Washburn equation
    Opis:
    Lignite is well known for its strong hydrophilicity and hard-to-float properties. However, the surface free energy of the solid is made up of two components, that is the Lifshitz-van der Waals and acid-base interaction energy. Differences in these two components between the low ash (lower density) and high ash fraction (higher density) provide a benefit for improving the separation efficiency through introducing surfactants in flotation. In this paper, thermodynamic characterization of three density lignite fractions was measured by a Washburn dynamic method. Combining the Washburn equation and Van Oss-Chaudhury-Good theory, the surface free energy components of three samples were calculated according to the wetting process by n-hexane, diiodomethane, deionized water and ethylene glycol. The Lifshitz-van der Waals part of surface free energy reduced with the coal density increase, especially between fractions of -1.45 g/cm3 and 1.45-1.80 g/cm3, while the Lewis base part increased slightly. The interfacial interaction free energies between the surfactant and lignite in aqueous medium indicated that the low hydrophilic index benefited for the stronger adsorption intensity. Increase of the surfactant Lifshitz-van der Waals component increases the adsorptive intensity on lower density lignite and the repulsive intensity on higher density lignite, which is beneficial for separation.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 2; 996-1008
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of a molybdenum-reducing bacterium with the ability to degrade phenol, isolated in soils from Egypt
    Autorzy:
    Ibrahim, Y.
    Abdel-Mongy, M.
    Shukor, M.S.
    Hussein, S.
    Ling, A.P.K.
    Shukor, M.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/80115.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    molybdenum
    molybdenum-reducing bacteria
    contaminated soil
    bioremediation
    nonylphenol
    phenol
    Egypt
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 3
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Annealing Study of Al/GaSb Contact with the Use of Doppler Broadening Technique
    Autorzy:
    Wang, H. Y.
    Weng, H. M.
    Ling, C. C.
    Ye, B. J.
    Zhou, X. Y.
    Han, R. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043365.pdf
    Data publikacji:
    2005-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Bj
    68.35.Ct
    73.40.Sx
    Opis:
    Using a monoenergetic positron beam, annealing study of the Al/n-GaSb system was performed by monitoring the Doppler broadening of the annihilation radiation as a function of the positron implanting energy. The S-parameter against positron energy data was successfully fitted by a three-layer model (Al/interface/GaSb). The annealing out of the open volume defects in the polycrystalline Al layer was revealed by the decrease in the S-parameter and the increase in the effective diffusion length of the Al layer. For the as-deposited samples, a 5 nm interfacial region with S-parameter larger than those of the Al overlayer and the bulk was identified. After the 400ºC annealing, this interfacial region extends to over 40 nm and its S-parameter dramatically drops. This is possibly due to the new phase formation at the interface. Annealing behaviors of S$\text{}_{B}$ and L$\text{}_{+,B}$ of the GaSb bulk showed the annealing out of positron traps (possibly the V$\text{}_{Ga}$-related defect) at 250ºC. However, a further annealing at 400ºC induces the formation of positron traps, which are possibly of another kind of V$\text{}_{Ga}$-related defect and the positron shallow trap GaSb antisite.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 5; 874-879
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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