It adopts multiple query optimization algorithms.
系统采用了多重持续查询优化算法。
This paper presents and evaluates a new type of query optimization algorithms that are based on layered backtrack algorithm.
该文提出了一类新的查询优化算法，并对其性能进行了评估、讨论。
Experimental results show that this algorithm has higher precision of document retrieval and faster computation speed compared with conventional query optimization algorithms.
实验结果表明，该算法在查询精度和计算速度上均优于常用的查询优化技术。
The characteristics of distributed database are introduced in this paper, common used query optimization algorithms are provided are provided, and the method of selection algorithm is given.
介绍了分散式数据库的特点，详细阐述了常用的查询优化演算法的思想，分析了优缺点，给出了演算法选择的方法。
It is shown by the prototype system that the proposed algorithms and techniques are very efficient and effective for query optimization and...
实践证明，这些技术和方法不仅能够快速有效地实现并行数据库管理系统，也能够有效地进行并行数据库查询的优化和处理。
It is shown by the prototype system that the proposed algorithms and techniques are very efficient and effective for query optimization and...
实践证明，这些技术和方法不仅能够快速有效地实现并行数据库管理系统，也能够有效地进行并行数据库查询的优化和处理。
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