然后由债务信度网络构造了容量费用网络，利用最小费用循环流问题给出了该模型的一个多项式算法。
Then we construct a capacity cost network from the debt credit degree network. Finally, by applying minimum cost circulation flow problem, we give a polynomial algorithm for this model.
值得注意的问题与循环流的正确分支和合并有关。
The noticeable problems relate to the correct branching and merging of the cyclic flows.
针对循环流化床锅炉的返料器、分离器和成品煤粒径等问题，介绍了国内外解决问题的经验和措施。
In view of several problems of return loop, separator and final coal grain size in CFB boilers, the improvement measure and experience were described.
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