Acta mathematica scientia,Series A ›› 2025, Vol. 45 ›› Issue (2): 584-603.

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The Construction of Optimal Orthogonal Arrays with Repeated Rows and Strength 2

Shanqi Pang*(),Youwei Lu(),Jing Wang()   

  1. School of Mathematics and Statistics, Henan Normal University, Henan Xinxiang 453007
  • Received:2024-06-18 Revised:2024-09-24 Online:2025-04-26 Published:2025-04-09
  • Contact: Shanqi Pang E-mail:pangshanqi@263.net;1277686343@qq.com;wangjing19@126.com
  • Supported by:
    NSFC(11971004);NSFC(12201189);NSFC(12471245);CPSF(2022M721055);Natural Science Foundation of Henan(242300421164)

Abstract:

Orthogonal arrays with repeated rows have been widely used, which can reduce the complexity and cost of experiments and improve the reliability of experimental results. The optimal orthogonal arrays with repeated rows has better statistical properties and combinatorial structure, but little is known about this kind of optimal orthogonal arrays. In this paper, we mainly study the methods of constructing the optimal orthogonal arrays with repeated rows by various permutation of levels and permutation of columns. Firstly, a method of constructing saturated orthogonal arrays by using independent columns is introduced. Then, the construction methods of optimal orthogonal arrays with repeated rows and m-optimal orthogonal arrays are proposed by using various permutation of levels or columns. Finally, several infinite class of optimal orthogonal arrays with repeated rows are obtained and provided for users.

Key words: orthogonal array, orthogonal array with repeated rows, optimal orthogonal array with repeated rows, permutation of levels and permutation of columns

CLC Number: 

  • O212.6
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