关键词: PBIL算法, 排污, 优化设置, 可持续发展

Abstract: The layout of drain plays an important role to the protection of water ecosystem and urban environment.In this paper the method of Population Based Incremental Learning algorithm（PBIL） is discussed to solve the optimization of drain layout.The main factors such as regional containing sewage capacity，sewage disposal capacity quantity limit of drains within specific area are considered as constraint conditions.Penalty function method is put forward to model the problem and object function is to guarantee economy benefit.The algorithm is applied to the drain layout engineering and the drain layout obtained though PBIL algorithm excels traditional method and it can protect the urban environment more efficiently and ensure the healthy development of water ecosystem more successfully.

Key words: Population Based Incremental Learning algorithm（PBIL）, drain layout, optimization, development