人工神经网络专家系统具有学习、记忆和泛化推广功能。MATLAB软件可根据用户的要求自动生成人工神经网络程序。本文应用BP模型人工神经网络对聚乙烯及其共混物的机械性能进行预测研究。结果表明 ,所建立的网络程序具有高速、容错和自适应等特点 ,在本领域的应用性能良好 ,预测准确率较高 ,达到预期的效果 Artificial neural network expert system has learning, memory and generalization promotion function. MATLAB software can automatically generate artificial neural network program according to user’s requirements. In this paper, BP model artificial neural network is used to predict the mechanical properties of polyethylene and its blends. The results show that the established network program has the characteristics of high speed, fault tolerance and self-adaptability, and has good application performance in this field, with high prediction accuracy and expected results