Related papers: NP=PSPACE

This paper has been withdraw by the author due to adding more modeling results.

This paper has been withdrawn by the author due to new results to be added.

This paper has been withdrawn by the author, due to an important sign error in Eqn. 2.

This paper has been withdrawn by the author.

The paper has bene withdrawn by the author.

This paper is withdrawn because the results in the paper are included in a paper to be published in Mathematical and Computer Modelling.

This paper has been withdrawn

This paper has been withdrawn by the author due to a crucial sign error in equation 2 and some mistake in Table 1 information. please let me for changing this information and updating this paper.

This paper has been temporarily withdrawn by the author(s),

This paper has been withdrawn due to a crucial theoretical error.

This paper has been withdrawn by the author, due to an error in Proposition 2.2.

This paper has been withdrawn by the authors due to a crucial error in equation 12.

This paper has been withdrawn by the author.

The paper has been withdrawn

This paper has been withdrawn by the author due to an error in the derivation.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author due to some mistakes

This paper has been withdrawn by the authors. We have discovered an error in the evaluation of the diagram, which invalidates our conclusion.

This paper has been withdrawn by the author(s)

This paper has been withdrawn by the author, due to errors in the figures.