| 1. | So most research of distributed query optimization aim at reducing communication cost
所以大多数研究分布式查询优化以减少通讯开销为目标。 |
| 2. | In distributed query optimization , this paper aims at how to reduce communication cost , adopting semi - join program
对于用传统的sdd - 1算法来寻找全归约程序进行改进。 |
| 3. | Distributed query optimization research is under way in universities , research laboratories and similar establishments
分布式查询优化的研究领域是分布式数据库中的研究热点。 |
| 4. | The distributed query optimization problem is the key point in distributed database systems , and it is an np hard one
既有理论上的问题，也有实际应用中的问题。这些问题在当前显得尤为重要。 |
| 5. | By keeping the above facts , i delved deeply in distributed query optimization algorithms , made some notable achievement . the paper focuses primarily on distributed query optimization
我正是在前人研究的问题基础上，对分布式查询优化方面的算法进行了深入的研究，取得了显著效果。 |
| 6. | Although many algorithms have been proposed for optimizing query - processing in order to minimize costs and or response time , associated with obtaining the answer to query in a distributed database system , database grid query optimization problem is fundamentally different from traditional distributed query optimization
系统的性能，尤其是查询的效率关系到整个系统的成败。虽然目前已经提出了许多关于分布式数据库的查询优化算法，但是语义数据库网格的查询优化与传统的分布式数据库有着显著的不同。 |
