This paper presents a efficient method for solving the unconstrained multivariat nonlinear optimization problems--the quasi-Conjugate-Gradient method.Derivations about the computation formula

iterative method and convergence criterion vere made.The propused method is not noly fit for solving the optimization problems which having analytical solutions

but also for those whose gradients are not easy to work out or whose objective function have only numerical solutions.Therefore

it can be used for many purposes.