关键词: 电站锅炉, 方案设计, 基于实例推理, 最邻近法, 实例表示

Abstract: To extract experience knowledge from enterprises cases and reduce the product design lifecycle, a design method of utility boiler based on CaseBased Reasoning (CBR) was presented. Firstly, the process of scheme design in utility boiler was recognized and decomposed. It was pointed out that the difficulty in scheme design was to identify and evaluate key parameters, and the general design model was constructed. Then, the past design schemes were decomposed by adopting the hierarchical case library to represent the cases so as to improve the search veracity and efficiency. Based on concept of statistical inference, a kind of neighbor algorithm was proposed to retrieve similar cases without manually defining dividing line parameters. Finally, by design case of a 420 t/h circulating fluidized bed boiler, the validity and efficiency of the presented method was demonstrated.

Key words: utility boiler, scheme design, casebased reasoning, nearest neighbor algorithm, case representation