A BB algorithm for solving large-scale unconstrained optimization problems

In the report， based on the IMPBOT algorithm， the BB algorithm combined with the modified secant equation， two new BB step sizes were obtained， and Armijo line search was used to propose a BB-type hybrid method for solving large-scale unconstrained optimization problems. The convergence of the proposed algorithm was proved under appropriate conditions， a large number of numerical experiments were performed to verify the effectiveness of the proposed algorithm.