Hidenori Kawai

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The 3D packing problem consists of arranging nonoverlapping rectangular boxes (blocks) of given sizes in a rectangular box of minimum volume. As a representation of 3D packings, this paper proposes a novel encoding method called Double Tree and Sequence (DTS). The following are features of DTS: 1) It can represent any minimal packing. 2) It can be decoded(More)
We consider an optimal ordering and replacement policy of a discrete time Markovian deterioration system when the observation of the system is incomplete. The problem is to examine the structure of an optimal policy which minimizes the total expected discounted cost in an infinite time span. Formulating by a Markovian decision process, the optimality of a(More)
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