说明：  锅炉优化运行问题，根据过量空气系数的主要影响因素：排烟热损失、化学不完全燃烧热损失、机械不完全燃烧热损失建立目标函数。
(In order to optimize the boiler operation, the objective function is established according to the main influencing factors of excess air coefficient: exhaust heat loss, chemical incomplete combustion heat loss and mechanical incomplete combustion heat loss.)