1. Utility value is the matter agent of environmental economics value, utility value relation assumes catenoid or netlike structure.
效用价值是环境经济价值的物质承担者，效用价值关系呈链状或网状结构。
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2. During form-finding of catenoid, when the viscosity coefficient was not more than0.7, the dynamic relaxation method taking damp into account had good convergence and the nodes distributed more even.
对悬链面找形时发现，当黏性系数不大于0.7时，动力松弛法收敛，网格节点分布较无阻尼时均匀。
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3. During form-finding of catenoid, when the viscosity coefficient was not more than0.7, the dynamic relaxation method taking damp into account had good convergence and the nodes distributed more even.
