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    A note on “Lattice soliton equation hierarchy and associated properties”
    Xi-Xiang Xu(徐西祥), Min Guo(郭敏)
    Chin. Phys. B, 2019, 28 (1): 010202.   DOI: 10.1088/1674-1056/28/1/010202
    Abstract539)   HTML    PDF (343KB)(131)      

    We demonstrate that the new hierarchy of integrable lattice equations in Chin. Phys. B 21 090202 (2012) can be changed into the integrable lattice hierarchy in Chin. Phys. B 13 1009 (2004) by using a very simple transformation.

    Comment on “Band gaps structure and semi-Dirac point of two-dimensional function photonic crystals” by Si-Qi Zhang et al.
    Hai-Feng Zhang(章海锋)
    Chin. Phys. B, 2018, 27 (1): 014205.   DOI: 10.1088/1674-1056/27/1/014205
    Abstract668)   HTML    PDF (659KB)(242)      
    Recently, Zhang et al. (Chin. Phys. B 26 024208 (2017)) investigated the band gap structures and semi-Dirac point of two-dimensional function photonic crystals, and the equations for the plane wave expansion method were induced to obtain the band structures. That report shows the band diagrams with the effects of function coefficient k and medium column ra under TE and TM waves. The proposed results look correct at first glance, but the authors made some mistakes in their report. Thus, the calculated results in their paper are incorrect. According to our calculations, the errors in their report are corrected, and the correct band structures also are presented in this paper.
ISSN 1674-1056   CN 11-5639/O4

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