中文摘要：

应用响应曲面法预测包含甲苯、异辛烷和正庚烷的汽油替代混合物辛烷值．以体积分数为输入，研究辛烷值、马达辛烷值为输出，建立数学模型，并比较了4种模型的预测性能．结果表明，改进的二阶模型MSOM的计算具有最低的SSE误差值，相比同为二阶的MLbV模型，总误差降低了46％．与此同时，MSOM可以对一定辛烷值的TRF燃料很好地进行组分比例的预测计算．根据绘制的辛烷值响应曲面和等值线可知，给定甲苯参比燃料的辛烷值，甲苯体积分数与基础燃料P值是成反比例的．

英文摘要：

Response surface method is applied to predict octane number of any arbitrary tri-component gasoline surrogate consisting of toluene, i-octane and n-heptane. Comparison on predictability of four models is made, and the modified second of model （MSOM） is proved to be more accurate. Calculation by MSOM improves by 46% to total SSE comparing with MLbV model. For a given octane number, the component proportion of TRF can be predicted. Response surface and contour plot of octane number are drawn.