The development of product collaborative design system should combine with the mainstream technology and take account of the traditional CAD system and the reuse of history data at the same time.

产品协同设计系统的开发不仅要结合当前主流技术应用，同时需要兼顾传统CAD系统及历史数据的再利用问题。

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First of all, the network is trained by history data, then the model is used to predict the general development trend of oil gas, finally the oil gas thickness is predicted.

该模型首先用历史数据对网络进行训练，然后利用训练好的模型进行油气浓度的趋势预测，最后结合某油气预报实例检验了免疫神经网络模型的可行性。

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This approach improves the efficiency of data using and history l event query, and also assures the continual development of the Urban Planning System with the data storage space saved.

在节省存贮空间的同时，提高了数据利用率和历史事件的查询效率。

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