然后阐述了自动注记配置的数据组织与结构，并分析了影响注记质量的基本因素；
Secondly, the author explains the data structures of automatic map labeling and analyzes the basic factors which influence label's quality.
从注记配置是一个NP难度问题这一观点出发，尝试性地将遗传算法用于点注记自动配置。
This article tries to apply genetic algorithms to label point lettering automatically according to the viewpoint that automatic lettering is one of the hard NP problems.
针对定向井分层注水的现状，对定向井分注工具和分注管柱进行了研制和合理配置。
Considering the status of separate layer water injection in directional well, the injection tools and pipe string are developed and collocated reasonably.
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