The BF algorithm can ensure the modeling quality. The BT algorithm can realize quick feedback. The dynamic search window can control the system scale and improve operation speed.
使用BF法可以保证调度质量，使用BT可实现快速回馈，使用动态搜索窗可以控制系统规模，提高运行速度。
Based on the analysis to several usual operations in data base application system, the optimized strategy on how to construct SQL sentence to improve operation speed is studied in this paper.
本文通过分析数据库应用系统中常见的几种运算，提出了如何构建SQL语句，才能达到运算的优化，提高系统运行速度。
A scientific and rational vehicle scheduling method will not only reduce the cost, but also increase the circulation speed, improve the operation efficiency and raise the service level.
通过科学合理的方法确定运输路线和时间，不仅可以降低运作成本，还可以加快物质配送速度、提高运营效益和保证顾客服务水平。
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