1. Department of Humanities and Social Sciences, Zhejiang Industry Polytechnic College, Shaoxing 312000, China
2. Department of Mathematics, Jiangsu University of Technology, Changzhou 213001, China
Abstract When experiments are carried out in a sequential of time, the response may be subject to the uncontrollable time trends. In this paper, magic cubes and hypo-magic cubes are used in these trend free plans with multi-factors, which show that all main effects and two-factor interaction effects are both linear trend free. Moreover, the proposed method can be applied for non prime power levers.
Received: 23 February 2014
Published: 10 June 2018
