The stress fields of en echelon faults with different geometry and mechanical conditions were considered by dynamically numerical simulation.
用数值模拟方法研究了几何、力学条件不同的雁列构造模型的应力场,探讨了几何参数对应力场的影响。
Results:As compared with TPN group, nitrogen balance was increased and mechanical ventilation time and treatment cost were decreased in EN group ( P <0.05).
结果:EN组氮平衡高于TPN组,机械通气时间、临床费用低于TPN组,组间差异均有显著性(P <0 .0 5 )。
Objective To study the nursing emphases and the methods of reducing the complications of severe patients with enteral nutrition (en) during mechanical ventilation.
目的探讨重症病人机械通气期间肠内营养(EN)的护理重点和减少并发症的方法。
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