( 1 ) modeling of numerical analysis of frozen soil ventiduct roadbed by ann ( 2 ) developing the ann optimization design system for ventiduct roadbed in permafrost area ( 3 ) defining of the sequel learning tactic of three layer bp network ( 4 ) improvement on bp arithmetic in ann module ( 2 )开发了冻土通风管路基优化设计神经网络分析软件系统具有完整的前后处理、温度场分析、设计方案优化等功能，能满足工程应用的基本需要。还能够作为数值分析子模块，以标准com组件形式嵌入“青藏铁路数字路基” gis系统。
