Wah, June Leong and Farid, Mahboubeh and Abu Hassan, Malik (2010) Improved Hessian approximation with modified quasi-Cauchy relation for a gradient-type method. Advance Modeling and Optimization, 12 (1). pp. 37-44. ISSN 1841-4311
In this work we develop a new gradient-type method with improved Hessian approximation for unconstrained optimization problems. The new method resembles the Barzilai-Borwein (BB) method, except that the Hessian matrix is approximated by a diagonal matrix rather than the multiple of the identity matrix in the BB method. Then the diagonal Hessian approximation is derived based on the quasi-Cauchy relation. To further improve the Hessian approximation, we modify the quasi-Cauchy relation to carry some additional information from the values and gradients of the objective function. Numerical experiments show that the proposed method yields desirable improvement.
|Keyword:||Diagonal updating; Modified quasi Newton equation; Quasi-cauchy relation|
|Subject:||Mathematical optimization.Calculus of variations|
|Subject:||Calculus of variations|
|Faculty or Institute:||Faculty of Science|
|Publisher:||ICI Publishing House|
|Deposited By:||Najwani Amir Sariffudin|
|Deposited On:||30 Nov 2011 09:07|
|Last Modified:||27 May 2013 07:56|
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