The results show the self-adapt optimized combination forecast model covering the aging function is better than the other forecast models for gas demand forecast.
结果表明，融入时效函数的自适应递推优化组合预测模型比采用其它预测模型预测的结果更好。
On the basis of the analysis of function demand and system data, a general structure of the information system was designed. And the types and hierarchy structure of system data models were studied.
在系统功能需求和数据需求分析的基础上，进行了系统总体结构设计，并研究了系统数据模型类型，提出了系统数据模型的分层结构。
We could derive the supplier's optimum price and the consumer's optimum ordering quantity through separately establishing the profit function models of both sides of the supply and demand.
通过分别建立供需双方的利润函数模型并导出供方的最优定价和需方的最优订货量。
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