This paper aims to develop an efficient adaptive finite element method for
the second-order elliptic problem. Although the theory for adaptive finite
element methods based on residual-type a posteriori error estimator and
bisection refinement has been well established, in practical computations, the
use of non-asymptotic exact of error estimator and the excessive number of
adaptive iteration steps often lead to inefficiency of the adaptive algorithm.
We propose an efficient adaptive finite element method based on high-accuracy
techniques including the superconvergence recovery technique and high-quality
mesh optimization. The centroidal Voronoi Delaunay triangulation mesh
optimization is embedded in the mesh adaption to provide high-quality mesh, and
then assure that the superconvergence property of the recovered gradient and
the asymptotical exactness of the error estimator. A tailored adaptive
strategy, which could generate high-quality meshes with a target number of
vertices, is developed to ensure the adaptive computation process terminated
within
7 steps. The effectiveness and robustness of the adaptive algorithm is
numerically demonstrated.