混合GANN模型在路面评价中的应用

Mixed GANN Models and the Application in Pavement Performance Assessment

针对 GA与 NN优缺点互补的特点 ,摒弃以往 GANN模型的不足 ,采用以 GA优化 BP网络权值与阈值 ,再用 BP网络对 GA搜索到的近似最优解进行微调的方法 ,建立了一种能充分发挥两者优势的混合 GANN模型 ,并将模型应用于高速公路沥青路面使用性能评价之中。介绍基于混合 GANN的高速公路沥青路面使用性能评价模型 ,通过与其他评价模型的分析对比表明 :该评价模型精确、易于实现 ,是一种实用的高速公路沥青路面使用性能评价模型。

A new GANN model is presented based on the complementation of advantag es of GA and NN. With this model the disadvantages of the existent GANN is elimi nated,at the same time the advantages of GA and NN are expanded sufficiently. I n this model,the connection weights and thresholds are optimized by using GA an d then the precision is increased with using BP. This paper centers on the model is applied to the assessment of expressway and a mixed GANN evaluation model of asphalt pavement performance is presented. Compared with others,the results indicate that the model is scienti fic,precise,practical and useful.