Alternating direction method for bi-quadratic programming

  • Authors:
  • Sheng-Long Hu;Zheng-Hai Huang

  • Affiliations:
  • Department of Mathematics, School of Science, Tianjin University, Tianjin, People's Republic of China 300072 and Department of Applied Mathematics, The Hong Kong Polytechnic University, Hung Hom, ...;Department of Mathematics, School of Science, Tianjin University, Tianjin, People's Republic of China 300072

  • Venue:
  • Journal of Global Optimization
  • Year:
  • 2011

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Abstract

Bi-quadratic programming (Bi-QP for short) was studied systematically in Ling et al. (SIAM J. Optim. 20:1286---1320, 2009) due to its various applications in engineering as well as optimization. Several approximation methods were given in the same paper since it is NP-hard. In this paper, we introduce a quadratic SDP relaxation of Bi-QP and discuss the approximation ratio of the method. In particular, by exploiting the favorite structure of the quadratic SDP relaxation, we propose an alternating direction method for solving such a problem and show that the method is globally convergent without any assumption. Some preliminary numerical results are reported which show the effectiveness of the method proposed in this paper.