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R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yongbin","family":"Ge","sequence":"additional","affiliation":[{"name":"Institute of Applied Mathematics and Mechanics , Ningxia University , Yinchuan , P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hai-Wei","family":"Sun","sequence":"additional","affiliation":[{"name":"Department of Mathematics , University of Macau , Macau , Macao"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"374","published-online":{"date-parts":[[2022,11,8]]},"reference":[{"key":"2023033113095759218_j_cmam-2022-0002_ref_001","unstructured":"J. Biazar and R. Asayesh,\nAn efficient high-order compact finite difference method for the Helmholtz equation,\nComput. Methods Differ. Equ. 8 (2020), no. 3, 553\u2013563."},{"key":"2023033113095759218_j_cmam-2022-0002_ref_002","doi-asserted-by":"crossref","unstructured":"R. F. 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Delvare,\nA meshless fading regularization algorithm for solving the Cauchy problem for the three-dimensional Helmholtz equation,\nNumer. Algorithms 82 (2019), no. 3, 869\u2013894.","DOI":"10.1007\/s11075-018-0631-y"},{"key":"2023033113095759218_j_cmam-2022-0002_ref_006","doi-asserted-by":"crossref","unstructured":"J. E. Caruthers, J. S. Steinhoff and R. C. Engels,\nAn optimal finite difference representation for a class of linear PDE\u2019s with application to the Helmholtz equation,\nJ. Comput. Acoust. 7 (1999), no. 4, 245\u2013252.","DOI":"10.1142\/S0218396X99000163"},{"key":"2023033113095759218_j_cmam-2022-0002_ref_007","doi-asserted-by":"crossref","unstructured":"T. Chaumont-Frelet,\nOn high order methods for the heterogeneous Helmholtz equation,\nComput. Math. Appl. 72 (2016), no. 9, 2203\u20132225.","DOI":"10.1016\/j.camwa.2016.08.026"},{"key":"2023033113095759218_j_cmam-2022-0002_ref_008","unstructured":"Z. Chen, D. Cheng, W. Feng and T. 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