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。
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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