传统风煤比寻优通常采用求解燃烧函数解析式，再求极值得出最佳风煤比，这一方法可靠性差而且工作量大。

In traditional ways, the optimal air coal ratio is obtained by solving combustion function and finding out the extremum, which is time consuming and unreliable.

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该文在统一判定条件下，借助于三次优函数，给出了两类一般迭代法的不同于以前的收敛性和误差估。

In this paper, a new convergence theorem and error estimates for two types of generalized method are obtained by means of cubic major function, under the unified determination.

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第四章也利用三次优函数得到了两类一般迭代法的收敛性和误差估计。

Then we give the convergence and error estimates for two types of generalized iterations by means of cubic majorizing function in chapter four.

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