结果：在两组之间的有关肝酶和胆红素以及血流动力学参数并无显著差异。
RESULTS: There was no significant difference between both groups concerning liver enzymes and bilirubin, nor in hemodynamic parameters.
系统模型中包含了用集总参数和相移动边界法建立的热交换器动态模型，以及压缩机和膨胀阀的稳态流动模型。
The system model comprises the dynamic heat exchanger model based on the lumped parameter method and moving phase boundary method, and the stable flow models of compressor and expansion valve.
计算结果与实验吻合较好，所获得的喷嘴内外部流场的流动状况以及冲击射流参数分布，可用于优化喷嘴内部结构设计。
It is useful in understanding nozzle internal and external flow field and impinging jet parameter distribution. It is also helpful for optimal design of nozzle internal structure.
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