医疗决策案例中非连续性属性信息大量存在,含该类信息的案例知识发现是多属性案例决策的关键和难点。该文研究了含非连续性属性信息案例中的决策知识发现,将条件概率和GAs融合技术整合到案例推理方法之中,开发了KNN的延伸方法——CRMGACP法。该方法的核心是基于Gas进行权重获取和基于融合条件概率的改进相似度算法进行案例知识获取。在某大型综合医院收集数据,获取有效数据300条,基于VC++开发实现的BC-CBRsys平台进行了实验研究,结果表明CRMGACP比其他常见方法具有更好的性能,在多个统计指标上展示出显著的优势。显然,改进的案例决策方法克服了含非连续性信息案例决策知识难以获取的问题,在临床决策领域具有广阔的前景。
The information with non-continuous features is ubiquitous in diagnosis and treatment decision making cases.The knowledge acquisition of the cases with this kind of feature has always been a key and bottleneck in multi-attribute case decision making.In this paper,conditional probability and GAs are integrated into case-based reasoning technology to develop an extension method of traditional KNN——CRMGACP algorithm,which includes a GAs-based weight determination method and an improved similarity algorithm integrating the conditional probability.Collecting data from AH Hospital,which is one of largescale hospitals in Anhui province,CancerCBRSys is developed as the experimental tool for tests.Experimental study is competed by comparing the performance amongst four different case-based reasoning methods.The results show that CRMGACP has the best performance and shows significant advantage in various statistics.In general,CRM-GACP solves the problem of knowledge discovery from non-continuous cases and is hopeful to be a powerful decision-making tool in the research area of clinical decision making.