How to build VORONOI diagram based on threaten locations, compute costs of flight routes, choose preliminary path and optimize path were discussed importantly.

重点讨论了如何根据威胁分布的VORONOI图建模，计算航路代价，航迹搜索和航迹优化。

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Without the FETCH FIRST (or similarly, but not exactly, without an OPTIMIZE FOR clause), then DB2 would almost certainly prefer some other access path.

没有FETCH FIRST(或者类似地，但是并不确切，是没有一个OPTIMIZE for子句)，那么DB 2毫无疑问会选择其他访问路径。

youdao

Optimize the best route algorithm, so that path query more quickly and accurately.

优化了最佳线路算法，使路径查询更加快速准确。

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