Acta mathematica scientia,Series A ›› 2009, Vol. 29 ›› Issue (2): 245-252.

• Articles • Previous Articles     Next Articles

An Optimal Filtering Method for Solving a |Sideways Parabolic Equation

 LI Hong-Fang, FU Chu-Li, XIONG Xiang-Qiu, NA Nan   

  1. (1. School of Mathematics and Statistics, Lanzhou University, Gansu Lanzhou 730000|2. College of Mathematics and Computational Science, China University of Petroleum, Shandong Dongying 257061; 3. School of Mathematical Sciences, Fudan University, Shanghai 200433|4. ILOG Software Technology (Shanghai) Co., Ltd., Shanghai 201203)
  • Received:2007-07-30 Revised:2008-06-05 Online:2009-04-25 Published:2009-04-25
  • Supported by:

    国家自然科学基金(10671085)、兰州大学理论物理与数学纯基础科学基金(Lzu05005)和中国石油大学(华东)引进人才(博士)科研基金(Y080807)资助.

Abstract:

The authors  consider a sideways parabolic equation in the quarter plane, i.e., a non-standard inverse heat conduction  equation with convection term. People want determine the solution u(x, t) for 0 < x <1 from the data along the line x=1. This is an  ill-posed problem in the sense that the solution (if it exists) does not depend continuously on the data. Some special regularization method is needed for solving this problem.  This paper considers an optimal filtering method and  gives the H\"{o}lder optimal error estimate between the exact
solution and its regularized approximation solution. Furthermore, the convergence of  the regularized approximation solution at x=0 is also obtained.

Key words: Ill-posed problem, Sideways parabolic equation, Optimal filter , method, Error estimate

CLC Number: 

  • 35R25
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