With the modeling problem of layout items in high dimensional layout problem as the application object, this paper introduces the concept of 2n-tree representation.
The 2N-pole fields are generated by 2N identical, symmetrically-arranged in azimuthal direction electrodes of circular concave form, whose potentials are Vo and -Vo alternately.
This paper summarizes some simple, convenient and infallible ways of writing 2N cyclic codes according to the characters of cyclic codes. It also points out the ways of coding random 2N cyclic codes.