An Optimal Filtering Algorithm for Table Constraints
An Optimal Filtering Algorithm for Table Constraints
复制标题
一种针对表约束的最优过滤算法
DOI:
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发表时间:
2012
期刊:
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通讯作者:
Y. Deville
中科院分区:
文献类型:
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作者:
Jean;Pascal Van Hentenryck;Y. Deville
Filtering algorithms for table constraints are constraint-based, which means that the propagation queue only contains information on the constraints that must be reconsidered. This paper proposes four efficient value-based algorithms for table constraints, meaning that the propagation queue also contains information on the removed values. One of these algorithms (AC5TC-Tr) is proved to have an optimal time complexity of O(r·t+r ·d) per table constraint. Experimental results show that, on structured instances, all our algorithms are two or three times faster than the state of the art STR2+ and MDDc algorithms.