%0 Journal Article %A LI Hong-Yi %A LI Qi-Sheng %A OU Zu-Jun %T Lower Bounds to Discrete Discrepancy and Symmetric L2 Discrepancy in  Two Level Fractional Factorial Designs %D 2014 %R 10.3969/j.issn.1007-2985.2014.03.005 %J Journal of Jishou University(Natural Sciences Edition) %P 20-22 %V 35 %N 3 %X On the basis of existing formula of  uniformity measurement and using the Langrange multiplier method and the formula of Taylor,the tight lower bounds to discrete discrepancy and symmetric L2 discrepancy of two level fractional factorial designs are obtained.Finally,two examples are given to illustrate the results. %U https://zkxb.jsu.edu.cn/EN/10.3969/j.issn.1007-2985.2014.03.005