{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T16:41:35Z","timestamp":1740156095897,"version":"3.37.3"},"reference-count":29,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2022,12,5]],"date-time":"2022-12-05T00:00:00Z","timestamp":1670198400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"the National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["11961044"],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"the Natural Science Foundation of Gansu Province","award":["21JR7RA214"]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"In this manuscript, we study the inverse problem for identifying the initial value of a time-fractional diffusion equation in an axisymmetric region. This is an ill-posed problem, i.e., the solution does not depend continuously on the data. We choose the Landweber iterative regularization method to solve this problem. Under the a priori and the a posteriori regularization parameter choice rules, we present the error estimates between the regularization solutions and the exact solution. We present some examples to show this method\u2019s effectiveness.<\/jats:p>","DOI":"10.3390\/sym14122569","type":"journal-article","created":{"date-parts":[[2022,12,5]],"date-time":"2022-12-05T09:10:02Z","timestamp":1670231402000},"page":"2569","source":"Crossref","is-referenced-by-count":1,"title":["Identification of the Initial Value for a Time-Fractional Diffusion Equation"],"prefix":"10.3390","volume":"14","author":[{"given":"Fan","family":"Yang","sequence":"first","affiliation":[{"name":"School of Science, Lanzhou University of Technology, Lanzhou 730050, China"}]},{"given":"Yin-Xia","family":"Gao","sequence":"additional","affiliation":[{"name":"School of Science, Lanzhou University of Technology, Lanzhou 730050, China"}]},{"given":"Dun-Gang","family":"Li","sequence":"additional","affiliation":[{"name":"School of Science, Lanzhou University of Technology, Lanzhou 730050, China"}]},{"given":"Xiao-Xiao","family":"Li","sequence":"additional","affiliation":[{"name":"School of Science, Lanzhou University of Technology, Lanzhou 730050, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1463","DOI":"10.1016\/j.enganabound.2004.07.003","article-title":"Time-dependent fundamental solutions for homogeneous diffusion problems","volume":"28","author":"Young","year":"2004","journal-title":"Eng. Anal. Bound. Elem."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"430","DOI":"10.1137\/0902035","article-title":"The multi-grid method for the diffusion equation with strongly discontinuous coefficients","volume":"2","author":"Alcouffe","year":"1981","journal-title":"SIAM J. Sci. Comput."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"141","DOI":"10.2478\/s13540-012-0010-7","article-title":"Initial-boundary-value problems for the one-dimensional time-fractional diffusion equation","volume":"15","author":"Luchko","year":"2012","journal-title":"Fract. Calc. Appl. Anal."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"411","DOI":"10.2478\/s13540-011-0025-5","article-title":"Existence and uniqueness of the solution for a time-fractional diffusion equation","volume":"14","author":"Kemppainen","year":"2011","journal-title":"Fract. Calc. Appl. Anal."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"3632","DOI":"10.1016\/j.camwa.2018.02.022","article-title":"The backward problem for a time-fractional diffusion-wave equation in a bounded domain","volume":"75","author":"Wei","year":"2018","journal-title":"Comput. Math. Appl."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"842","DOI":"10.1080\/00036811.2017.1293815","article-title":"Tikhonov regularization method for a backward problem for the inhomogeneous time-fractional diffusion equation","volume":"97","author":"Tuan","year":"2018","journal-title":"Appl. Anal."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1769","DOI":"10.1080\/00036810903479731","article-title":"A backward problem for the time-fractional diffusion equation","volume":"89","author":"Liu","year":"2010","journal-title":"Appl. Anal."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"60","DOI":"10.1007\/s40314-022-01762-0","article-title":"Three regularization methods for identifying the initial value of time fractional advection-dispersion equation","volume":"41","author":"Yang","year":"2022","journal-title":"Comput. Appl. Math."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"95","DOI":"10.1016\/j.apnum.2013.12.002","article-title":"A modified quasi-boundary value method for an inverse source problem of the time-fractional diffusion equation","volume":"78","author":"Wei","year":"2014","journal-title":"Appl. Numer. Math."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"23","DOI":"10.1016\/j.enganabound.2012.08.003","article-title":"Reconstruction of a time-dependent source term ina time-fractional diffusion equation","volume":"37","author":"Wei","year":"2013","journal-title":"Eng. Anal. Bound. Elem."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/s40314-021-01538-y","article-title":"Identifying the source function for time fractional diffusion with non-local in time conditions","volume":"40","author":"Luc","year":"2021","journal-title":"Comput. Appl. Math."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1186\/s13660-015-0602-y","article-title":"Inverse problem for a time-fractional parabolic equation","volume":"2015","author":"Ozbilge","year":"2015","journal-title":"J. Inequal. Appl."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"065014","DOI":"10.1088\/0266-5611\/29\/6\/065014","article-title":"Simultaneous inversion for the space-dependent diffusion coefficient and the fractional order in the time-fractional diffusion equation","volume":"29","author":"Li","year":"2013","journal-title":"Inverse Probl."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1016\/j.matcom.2006.09.005","article-title":"A modified Tikhonov regularization method for a spherically symmetric three-dimensional inverse heat conduction problem","volume":"75","author":"Cheng","year":"2007","journal-title":"Math. Comput. Simulat."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"432","DOI":"10.1016\/j.apm.2006.12.012","article-title":"Two regularization methods for a spherically symmetric inverse heat conduction problem","volume":"32","author":"Cheng","year":"2008","journal-title":"Appl. Math. Model."},{"key":"ref_16","first-page":"1","article-title":"A modified quasi-boundary value method for solving the radially symmetric inverse heat conduction problem","volume":"96","author":"Cheng","year":"2016","journal-title":"Appl. Anal."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1186\/s13661-017-0785-x","article-title":"Stability estimate and regularization for a radially symmetric inverse heat conduction problem","volume":"2017","author":"Cheng","year":"2017","journal-title":"Bound. Value Probl."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"939","DOI":"10.1016\/j.apm.2012.03.024","article-title":"Numerical identification of source terms for a two dimensional heat conduction problem in polar coordinate system","volume":"37","author":"Yu","year":"2013","journal-title":"Appl. Math. Model."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"311","DOI":"10.3846\/13926292.2017.1309329","article-title":"A Backward Identifying Problem for an Axis-Symmetric Fractional Diffusion Equation","volume":"22","author":"Xiong","year":"2017","journal-title":"Math. Model. Anal."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"159","DOI":"10.1186\/s13661-017-0890-x","article-title":"Regularization method for the radially symmetric inverse heat conduction problem","volume":"2017","author":"Djerrar","year":"2017","journal-title":"Bound. Value Probl."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1109","DOI":"10.1080\/17415977.2017.1384825","article-title":"Landweber iteration regularization method for identifying unknown source on a columnar symmetric domain","volume":"26","author":"Yang","year":"2018","journal-title":"Inverse Probl. Sci. Eng."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"128","DOI":"10.1186\/s13662-020-2542-1","article-title":"Tikhonov regularization method for identifying the space-dependent source for time-fractional diffusion equation on a columnar symmetric domain","volume":"2020","author":"Yang","year":"2020","journal-title":"Adv. Differ. Equ."},{"key":"ref_23","first-page":"514","article-title":"Landweber iterative method for an inverse source problem of time-fractional diffusion-wave equation on spherically symmetric domain","volume":"10","author":"Yang","year":"2020","journal-title":"J. Appl. Anal. Comput."},{"key":"ref_24","unstructured":"Podlubny, I. (1999). Fractional Differential Equation, Academic Press."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Bakushinsky, A.B., and Kokurin, M.Y. (2004). Iterative Methods for Approximate Solution of Inverse Problems, Springer.","DOI":"10.1007\/978-1-4020-3122-9"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Beilina, L., and Klibanov, M. (2012). Approximate Global Convergence and Adaptivity for Coefficient Inverse Problems, Springer.","DOI":"10.1007\/978-1-4419-7805-9"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Ito, K., and Jin, B. (2015). Inverse Problems: Tikhonov Theory and Algorithms, World Scientific.","DOI":"10.1142\/9120"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Tikhonov, A.N., Goncharsky, A., Stepanov, V.V., and Yagola, A.G. (1995). Numerical Methods for the Solution of Ill-Posed Problems, Springer.","DOI":"10.1007\/978-94-015-8480-7"},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Engl, H.W., Hanke, M., and Neubauer, A. (1996). Regularization of Inverse Problems, Kluwer Academic Publishes.","DOI":"10.1007\/978-94-009-1740-8"}],"container-title":["Symmetry"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-8994\/14\/12\/2569\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,8,10]],"date-time":"2024-08-10T18:29:38Z","timestamp":1723314578000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-8994\/14\/12\/2569"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,12,5]]},"references-count":29,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2022,12]]}},"alternative-id":["sym14122569"],"URL":"https:\/\/doi.org\/10.3390\/sym14122569","relation":{},"ISSN":["2073-8994"],"issn-type":[{"type":"electronic","value":"2073-8994"}],"subject":[],"published":{"date-parts":[[2022,12,5]]}}}