用粗糙集理论评价生物质固体成型燃料技术的研究

Assessment of biomass pellets and briquettes technologies by using rough sets theory

由于生物质固体成型燃料技术在中国处于发展初期,技术水平良莠不齐,对其进行综合评价比较复杂,且具有不确定性。该文基于粗糙集理论提出了一种综合评价模型,该模型将模糊综合评价中权重系数的确定转化为粗糙集理论中属性重要性的计算,有效地克服了现有评价模型中权重系数确定的主观性,从而使评价的结果更加客观。利用模型对生物质固体成型燃料技术进行了综合评价,得到了符合实际的评价结果,并结合设备使用要求和技术条件,确定了包括机械活塞成型、胶凝粘结成型、液压活塞成型、对辊挤压成型、环模压辊成型等在内的适宜优先推广的技术评价方案。

Since biomass briquette/pellet technology has been at the initial stage of development in China, the good and bad are intermingled for technical level, its comprehensive evaluation becomes more complicated and uncertain. Rough Sets Theory is an effective tool in dealing with vague and uncertainty information. A new comprehensive evaluation model based on Rough Sets Theory has been proposed in this paper, in which the evaluation of weighting coefficient has been transformed into calculation of the importance of attributes, so it can effectively avoid subjectivity about the weighting coefficient in fuzzy comprehensive evaluation. Another contribution to the paper is that a new attribute reduction algorithm by constructing generalized decision table has been presented in the paper, which effectively reduces the computational complexity and increases reduction efficiency during reduction. Finally, the model has been applied to comprehensive evaluation of listed-technology in China. The results show that appropriate priority to the promotion of the technology is mechanical piston pelletizing technology, stickiness felted pelletizing technology, hydraulic piston pelletizing technology, double rollers pelletizing technology, and annulus die and pressing roller pelletizing technology in turn.