Y.  Xianliang, Lianlian, J., and Songling, W., ?A leakage monitoring system of pipeline in heating network?, Journal of Digital Information Management, vol. 11, no. 6, pp. 462 - 469, 2013.

G.  Jiang, He, E., Li, G., Kong, J., and Xie, L., ?Production line production planning model of iron and steel enterprise?, Journal of Digital Information Management, vol. 11, no. 2, pp. 131 - 135, 2013.

S. F.  Al-Hamdan, ?An algorithm for generating the design matrix for multivariate polynomial least squares fitting?, Journal of Digital Information Management, vol. 5, no. 4, pp. 225 - 230, 2007.