Journal of Software:2011.22(5):929-937

(吉林大学 计算机科学与技术学院,吉林 长春 130012;吉林大学 符号计算与知识工程教育部重点实验室,吉林 长春 130012)
Configuration Solving and Computing Explanations Based on Equivalence Class Partition
LI Hong-Bo,LI Zhan-Shan,HAN Wen-Cheng
(College of Computer Science and Technology, Jilin University, Changchun 130012,China; Symbol Computation and knowledge Engineer of Ministry of Education, Jilin University, Changchun 130012, China)
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Received:April 29, 2009    Revised:January 05, 2010
> 中文摘要: 基于约束的配置模型中会有一些变量之间不存在任何直接或间接的约束关系,这样的变量之间进行约束传播不会互相影响取值.基于配置问题的这一特点,提出了一种等价类划分的思想,用于构造产品模型时的预处理技术,可以有效地将原问题划分为若干子问题,证明了这些子问题可以分别处理.分别采用两种回溯策略对求解效率进行了测试,结果表明能够有效地提高求解效率.最后,等价类划分方法与计算解释的QUICKXPLAIN 算法集成计算冲突解释,测试结果表明,经过等价类划分后,同样可以有效地提高计算解释的效率.
中文关键词: 约束满足  配置  等价类  回溯  冲突解释
Abstract:Some variables in a constraint-based configuration model may not have any immediate or indirect relationship between them; therefore, these variables will never intervene with each other in a constraint propagation. According to this characteristic of configuration, this paper proposes a preprocessing approach based on equivalent class partition, which can be used in the process of building the product model, so that the original configuration problem can be effectively divided into several sub-problems, and these sub-problems can be solved independently. The two backtracking-strategies are used in testing this method. The experimental results show that this method can effectively improve searching efficiency. Moreover, the method is integrated with the QUICKXPLAIN algorithm to compute conflict explanations, and the result show that it can also improve the efficiency of the algorithm.
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基金项目:国家自然科学基金(60773097, 60873148, 60973089); 吉林省科技发展计划(20071106, 20080107) 国家自然科学基金(60773097, 60873148, 60973089); 吉林省科技发展计划(20071106, 20080107)
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LI Hong-Bo,LI Zhan-Shan,HAN Wen-Cheng.Configuration Solving and Computing Explanations Based on Equivalence Class Partition.Journal of Software,2011,22(5):929-937