The aim of the model is maximizing its expected income. It describes the bidding problem with zero-sum and two-person mixed strategy and proposes the market price according to normal distribution.
该模型以发电厂商的期望收益最大为目标，采用零和二人混合对策描述竞价问题，并假设市场电价符合正态分布。
For 431 (66.10%) kinds of drugs, the distribution of difference between the highest bidding price and the lowest bidding price was within 1 times;
有431种（66.10％）药品在不同省（区、市）最高中标价格与最低中标价格差异倍数分布在1倍之内；
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