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1. In petrochemical industry,the ash accumulation and fouling of furnace tubes have a serious negative impact on furnace thermal efficiency.
   石化行业加热炉炉管的积灰结垢会严重影响加热炉的热效率。
2. For the functions of various nodes and the relationship among them, we find the factors which impact the security of visiting requests and the costs.
   针对存储区域网络中各类结点的功能以及相互关系，找出影响识别访问请求安全性和开销的因素。