The performance of the Reverse-Brayton cryocooler is analyzed, the mathematic model of the components of the cryocooler is established.
对逆布雷顿循环空气制冷机进行了性能分析，建立了空气制冷机各部件的数学模型。
In this article, the parametrical mathematic model, physical model and finite model that adapted for the main performance indexes of pipe extrusion were developed.
本文提出并建立了适合管材挤出主要性能指标的参数化数学模型、物理模型和有限元模型。
Using reverse engineering procedure with control theory to analyze and identify, the mathematic model of dynamic performance was completed.
采用反向工程试验法，应用控制理论分析辨识，得到了其动态特性的数学模型。
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