Optimal designs for K-factor two-level models with first-order interactions on a symmetrically restricted design region

Optimal designs for K-factor two-level models with first-order interactions on a symmetrically restricted design region
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对称限制设计区域上具有一阶相互作用的 K 因子两级模型的优化设计

DOI:
10.1007/s00362-018-01063-x
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发表时间:
2019
期刊:
影响因子:
1.3
通讯作者:
Schwabe
Schwabe
中科院分区:
数学2区
文献类型:
--
作者:
Freise;Schwabe

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当较高水平的因子数和较低水平的因子数同时受同一阈值约束时,我们在完全析因设计区域的一个子集上研究了具有一阶交互作用的线性模型的D-最优设计.事实证明,在窄裕度的情况下,最优设计仅集中在那些设计点上,对于这些设计点,要么达到阈值,要么高电平和低电平的数量尽可能相等。在裕度较宽的情况下,设置分布更广,得到的最优设计与完全析因设计一样有效。这些发现也适用于其他最优性标准。
We developD-optimal designs for linear models with first-order interactions on a subset of thefull factorial design region, when both the number of factors set to the higher level and the number of factors set to the lower level are simultaneously bounded by the same threshold. It turns out that in the case of narrow margins the optimal design is concentrated only on those design points, for which either the threshold is attained or the numbers of high and low levels are as equal as possible. In the case of wider margins the settings are more spread and the resulting optimal designs are as efficient as a full factorial design. These findings also apply to other optimality criteria.
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