TWO METHODS TO DECREASE THE NUMERICAL ERROR IN CALCULATING OF EFG

Based on the development of EFG and its basic theory, some circs of matrix in the nun-unit method are discussed and the effect of each circs to simulation of EFG is also analyzed. The case that numerical errors easily come into being in the computable process of the MLSM has been rectified. Some extreme formations of station that affect matrix A are confirmed in this paper, which show the character that the shape function’s value does not act with the computing nodes’ coordination, but depends on the relative coordination between the interpolation nodes and the computable nodes. These formations are verified by mathematic theory or numerical method, which have important theoretical values and practical significance for the precision of MLSM with the simulation function of EMG.