求翻译：为了预测2012年9月青岛国际车展的举行，将给宝马的需求量带来什么变化。在这里，使用指数平滑法预测和计算宝马的需求量。通过网络查找资料，收集到1到4月份宝马在中国的销量的历史数据。因为车展将发生在9月份，无法获得5到8月的数据。所以，根据2011年5到8月的历史数据以及增长比例，对2012年5到8月的数据进行估计。这些数据都是实际值At-1,由于观察值的变动不是很大，所以A选择为0.5. 最后，使用指数平滑法的公式来计算出宝马9月份的需求量。是什么意思？

In order to predict the Qingdao International Auto Show held in September 2012, will give BMW demand change. Here, the use of exponential smoothing to predict and calculate the demand for BMW. Through the network to find information, to collect historical data of 1-4 months of BMW in China sales. Th

In order to anticipate September 2012 Qingdao International Motor Show will be held to the BMW's demand is what changes. In this case, using exponential smoothing forecasts and compute the BMW's demand. To find information through the network, the 1 to 4 month BMW sales in China in historical data.

Forecast September 2012 held in Qingdao International Auto show, will bring changes to the demand for the BMW. Here, using exponential smoothing prediction and calculation of%2