| 实体化视图动态选择预处理算法的研究 |
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| 引用本文： | 方绪健,王伟皓.实体化视图动态选择预处理算法的研究[J].计算机与数字工程,2007,35(1):21-24. |
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| 作者姓名： | 方绪健 王伟皓 |
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| 作者单位： | 杭州电子科技大学软件职业技术学院,杭州,310012 |
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| 摘 要： | 实体化视图是数据仓库中提高查询效率的有效手段，数据仓库运行期间，需要对其中的实体化视图进行维护，从而保证用户查询的响应时间较短。针对用于实体化视图动态选择的遗传算法收敛速度慢，运行时间长的问题，提出一种预处理算法来计算动态选择实体化视图时遗传算法的初始群体。理论分析和宴验结果表明，该算法可以有效地提高实体化视图动态选择时的寻优收敛速度。
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| 关 键 词： | 数据仓库 实体化视图 动态选择 遗传算法 |
| 修稿时间： | 2006年2月28日 |
Research on Pretreatment Algorithm for Dynamic Selection of Materialized Views |
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| Fang Xujian,Wang Weihao.Research on Pretreatment Algorithm for Dynamic Selection of Materialized Views[J].Computer and Digital Engineering,2007,35(1):21-24. |
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| Authors: | Fang Xujian Wang Weihao |
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| Affiliation: | Fang Xujian |
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| Abstract: | Materialized view is an effective method for improving the efficiency of queries in data warehouse. During the running of data warehouse,materialized views need to be maintained to guarantee the response time of user queries.Aiming at slow convergence and long runtime of genetic algorithm for dynamic selection of materialized views,this paper presents a pretreat- ment algorithm to calculate the original colony of genetic algorithm.Theoretical analysis and practical outcomes show that algorithm can improve convergence speed ef- fectively in dynamic selection of materialized views. |
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| Keywords: | Data Warehouse Materialized View Dynamic Selection Genetic Algorithm |
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