We analyze the gene expression profiles of colon and recursively eliminate the genes which have lower sensitivity to BP neural networks,then a set of candidate nested feature subsets are generated.

• 以结肠癌基因表达谱为例,首先定义基因对BP神经网络模型输出函数的灵敏度,递归去除灵敏度较低的若干基因,生成一组嵌套的候选特征基因子集。