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    Wyświetlanie 1-8 z 8
    Tytuł:
    An Improved Method of Permutation Correction in Convolutive Blind Source Separation
    Autorzy:
    Wang, L.
    Ding, H.
    Yin, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/177954.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    blind source separation
    cocktail party
    convolutive mixing
    frequency domain
    permutation problem
    Opis:
    This paper proposes an improved method of solving the permutation problem inherent in frequency-domain of convolutive blind source separation (BSS). It combines a novel inter-frequency dependence measure: the power ratio of separated signals, and a simple but effective bin-wise permutation alignment scheme. The proposed method is easy to implement and surpasses the conventional ones. Simulations have shown that it can provide an almost ideal solution of the permutation problem for a case where two or three sources were mixed in a room with a reverberation time of 130 ms.
    Źródło:
    Archives of Acoustics; 2010, 35, 4; 493-504
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Explanation of the Optical Spectra and Spin-Hamiltonian Parameters for Nickel(II) in Cadmium Bromide Crystal
    Autorzy:
    Gong, J.
    Wang, L.
    Feng, W.
    Yang, X.
    Zhang, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1493631.pdf
    Data publikacji:
    2011-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.70.Ch
    75.10.Dg
    61.72.Bb
    76.30.Fc
    Opis:
    Based on crystal- and ligand-field theory, double-spin-orbital coupling approach was used to analyze the crystal-field energy levels and spin-Hamiltonian parameters of $Ni^{2+}$ ion at trigonal site in $CdBr_2$. The local lattice distortion (Δ R and $τ_{Ni^{2+}}$) is estimated from the crystal field parameters; the crystal field energy Hamiltonian was diagonalized in the full basis consisting of 45 wave functions of the $Ni^{2+}$ ion. Results of calculations are in good agreement with experimental data. The reasonableness of the theoretical results is discussed.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 3; 497-500
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biosorption of Pb(II) and Zn(II) by Extracellular Polymeric Substance (Eps) of Rhizobium Radiobacter : Equilibrium, Kinetics and Reuse Studies
    Autorzy:
    Wang, L.
    Yang, J.
    Chen, Z.
    Liu, X.
    Ma, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/204971.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biosorption
    extracellular polymeric substance
    EPS
    Rhizobium radiobacter
    heavy metal
    kinetics
    Opis:
    The extracellular polymeric substance (EPS) produced from Rhizobium radiobacter F2, designated as EPSF2 , was investigated as a biosorbent for the removal of Pb(II) and Zn(II) from aqueous solution. The optimum biosorption pH values were 5.0 for Pb(II) and 6.0 for Zn(II). Kinetics study revealed that the biosorption followed pseudo-first-order model well, and the equilibrium data fit the Langmuir model better. The adsorbed metal ions could be effectively desorbed by HCl. Desrobed EPSF2 regained 80% of the initial biosorption capacity after five cycles of biosorption-desorption-elution. These results demonstrated that EPSF2 could be a promising alternative for Pb(II) and Zn(II) removal from aqueous solution.
    Źródło:
    Archives of Environmental Protection; 2013, 39, 2; 129-140
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Trophic connectivity between intertidal and offshore food webs in Mirs Bay, China
    Autorzy:
    Ning, J.
    Du, F.
    Wang, X.
    Wang, L.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/47613.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    intertidal zonation
    offshore zone
    food web
    different habitat
    trophic interaction
    stable isotope
    carbon isotope composition
    Mirs Bay
    China
    Źródło:
    Oceanologia; 2019, 61, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution and role of the genus Oithona (Copepoda: Cyclopoida) in the South China Sea
    Autorzy:
    Wang, L.
    Du, F.
    Wang, X.
    Li, Y.
    Ning, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/47786.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Oithona
    Copepoda
    Cyclopoida
    temperature
    hydrological factor
    phytoplankton
    ichthyoplankton
    South China Sea
    Oithona plumifera
    Oithona similis
    Opis:
    The relationships between the small cyclopoid copepod Oithona and hydrological factors, phytoplankton and ichthyoplankton were evaluated using the data obtained in the central South China Sea (SCS) in summer 2014. The genus abundance ranged from 6.00 ind. m3 to 93.75 ind. m3 with high abundance band occurring in the branch of SCS Monsoon Jet. The lower temperature and higher salinity in the surface water of the band than other zones indicated that deep water intrusion was a positive factor for aggregation of the genus. The community structure of the genus was dominated by Oithona plumifera and Oithona similis made up 97% of the genus abundance associated with Oithona tenuis. The result of db-RDA analysis showed that the community structure of the genus was affected by temperature, Chl a, larval fishes and fish spawns, and temperature was the most important limiting factor. The result of GAMs analysis showed that abundance of O. tenuis, and copepodites were affected by Chl a, larval fishes and fish spawns; abundance of O. similis was affected by Chl a and fish spawns; and abundance of O. plumifera was affected by Chl a and larval fishes. Therefore, we suggest that the branch of SCS Monsoon Jet and deep water intrusion favor aggregation of plankton in the central SCS in summer. We confirm that the temperature is the limiting factor to the reproduction of the genus Oithona in tropic seas and the genus Oithona is a food-web linker between primary production and larval fishes in the central SCS.
    Źródło:
    Oceanologia; 2017, 59, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology of the invasive amphiphyte Alternanthera philoxeroides under different water levels and nitrogen concentrations
    Autorzy:
    Ding, W.
    Zhang, H.
    Zhang, F.
    Wang, L.
    Cui, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/19911.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2014, 56, 2
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving Triggering Characteristics for a Surface-Flashover Triggered Vacuum Switch
    Autorzy:
    He, Z.
    Wang, L.
    Li, F.
    Yao, W.
    Dong, M.
    Zhao, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807889.pdf
    Data publikacji:
    2009-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.80.Vp
    52.75.Kq
    52.25.Mq
    Opis:
    A surface-breakdown triggered vacuum switch with parallel disk electrodes and semiconductor surface flashover trigger electrode has many advantages, it is easy to be triggered and machined. The resistance of the trigger gap has been increased in terms of modifying the thickness of the semiconductor layer and improving coating process technology. The trigger gap resistance, trigger voltage and trigger waveforms were experimentally tested. The results show that the triggering characteristics can be improved by increasing the trigger resistance.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 6; 1019-1021
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving spodumene flotation using a mixed cationic and anionic collector
    Autorzy:
    Wang, Y.
    Zhu, G.
    Yu, F.
    Lu, D.
    Wang, L.
    Zhao, Y.
    Zheng, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/109883.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    spodumene
    lithium
    silicates
    flotation
    anionic surfactant
    cationic surfactant
    Opis:
    Lithium, a rare-earth element, has been in increasing demand. Spodumene flotation is an important and challenging step for lithium extraction and production from lithium ore. In the present work, flotation tests for three pure minerals (i.e., spodumene, quartz and feldspar) and a real spodumene ore were carried out at laboratory scale. The results showed that YOA, a mixture of oleic acid and dodecylamine with the molar ration of 10:1, could be used as collector to produce a spodumene concentrate with grade of 5.59% Li2O from the feed ore with grade of 1.48% Li2O where 85.24% of Li2O was recovered to the concentrate. The measured zeta potential, contact angle and adsorption capacity indicated that YOA was preferentially adsorbed on spodumene instead of on quartz or feldspar, with the spodumene surface being more hydrophobic than that of feldspar or quartz. The adsorption energies of YOA on spodumene were calculated and the results provided insights into the superior flotation performance obtained in the present work.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 2; 567-577
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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