中文摘要：

为了提高销售预测的准确性，建立了组合销售预测模型。历史销售数据是非线性、时变的时间序列，可看成由线性和非线性2部分组成。用ARMA模型预测线性部分，用BP＿AdaBoost模型预测非线性部分，然后将2部分预测结果叠加得到销售预测结果。该组合模型克服了单纯采用ARMA模型预测结果精度低的问题，也克服了单纯使用BP神经网络模型容易陷入局部极小值的问题。经实验对比表明，采用组合预测模型能够更加准确、全面地反应销售规律，提高了销售预测的准确性。

英文摘要：

In order to improve the accuracy of prediction, a combined sales prediction model is established.The historical sales data is nonlinear, time-varying time series.It consists of two parts, the linear and nonlinear.By using the ARMA model, the lin-ear part can be predicted while the nonlinear part can be predicted by using BP_AdaBoost model.Then the two prediction results are added together.The combination model overcomes the problem of low accuracy by using ARMA model alone.What’ s more, it also overcomes the problems that BP neural network model is easy to fall into local minimum.The experiments show that the combination model can improve the accuracy of sales prediction and reflect market rules more accurately and comprehensively.