[[abstract]]In this thesis, we are interested in finding the run orders of central composite designs for rotatability with correlated structures. Based on the rotatable conditions in Das (1997), run order of central composite design is studied for two different inter-class correlated structures. Given a central composite design that contains 2^k full factorial design; 2^(k-1)+k+2 center points and 2k star points with alpha=2^(k/4), the rotatable run order are determined. Then for any central composite design, we transform the rotatable run order problem as an maximization problem according to the rotatable measure proposed by Das (1999). To solve this maximization problem, a simulate annealing algorithm in Zhou (2001) is modified for search...
We introduce a modification to the coordinate-exchange algorithm for generating optimal experimental...
Random execution of run sequences is employed in response surface designs to avoid bias in the respo...
Construction of second order slope rotatable designs under tri-diagonal correlated structure of erro...
This paper extended the work of Chigbu and Nduka (2006), which obtained interesting results on close...
[[abstract]]In this thesis, we are interested in finding the conditionally optimal star points for t...
There are several desirable properties that response surface de-signs may have. Sometimes we need de...
Copyright © 2015 Emmanuel U. Ohaegbulem, Polycarp E. Chigbu. This is an open access article distribu...
The variations of the Face-centered Central Composite Design under partial replications of design po...
Not AvailableRun order consideration for mixed factorial, fractional factorial and confounded factor...
A class of efficient and economical response surface designs that can be constructed using known des...
When a multifactor experiment is carried out over a period of time, the responses may depend on a ti...
A class of efficient and economical response surface designs that can be constructed using known des...
[[abstract]]In this thesis, we are interested in finding optimal composite designs and minimal-point...
Abstract. The concept of rotatability introduced by Box and Hunter (1957, Ann. Math. Statist., 28, 1...
The problem of constructing trend-resistant factorial designs is discussed. Suppose a factorial expe...
We introduce a modification to the coordinate-exchange algorithm for generating optimal experimental...
Random execution of run sequences is employed in response surface designs to avoid bias in the respo...
Construction of second order slope rotatable designs under tri-diagonal correlated structure of erro...
This paper extended the work of Chigbu and Nduka (2006), which obtained interesting results on close...
[[abstract]]In this thesis, we are interested in finding the conditionally optimal star points for t...
There are several desirable properties that response surface de-signs may have. Sometimes we need de...
Copyright © 2015 Emmanuel U. Ohaegbulem, Polycarp E. Chigbu. This is an open access article distribu...
The variations of the Face-centered Central Composite Design under partial replications of design po...
Not AvailableRun order consideration for mixed factorial, fractional factorial and confounded factor...
A class of efficient and economical response surface designs that can be constructed using known des...
When a multifactor experiment is carried out over a period of time, the responses may depend on a ti...
A class of efficient and economical response surface designs that can be constructed using known des...
[[abstract]]In this thesis, we are interested in finding optimal composite designs and minimal-point...
Abstract. The concept of rotatability introduced by Box and Hunter (1957, Ann. Math. Statist., 28, 1...
The problem of constructing trend-resistant factorial designs is discussed. Suppose a factorial expe...
We introduce a modification to the coordinate-exchange algorithm for generating optimal experimental...
Random execution of run sequences is employed in response surface designs to avoid bias in the respo...
Construction of second order slope rotatable designs under tri-diagonal correlated structure of erro...