对封闭型分级单屈服面模型参数中的阶段改变参数和硬化参数的优化进行了研究。
In this paper, optimization of phase change parameter and hardening parameter of closed hierarchical single surface model is studied.
分析了燕化化工一厂目前的供冷方式及存在的问题，对单效型溴冷机的技术参数、年运行费用等进行了全面的分析比较。
In this paper, the way of providing cold energy and the existing Problem were discussed, the specification and annual operation cost of the single-action on liBr-Refrigeratory were thoroughly studied.
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