To probe the tendency and factors of the price in this period, the paper finds out the most suitable changeable weight from the aspects of cost and need according to the measurement of price standard.

为探讨在这段时期物价的走势与决定因素，本文以物价水准的计量分析，从成本面与需求面上找出最适的解释变权。

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The changeable weight combined method is presented based on the principles of forecast effectiveness optimization through study of mid-long load combined forecast.

对中长期负荷组合预测进行了研究，提出了基于预测有效度最优的原则来求取组合预测加权系数的方案。

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In this paper, a new algorithm for the estimation of optimum weight coefficients of changeable weight combination forecast model is proposed.

给出了一种变权重组合预测模型权系数估计的新算法。

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