The simulation results show the validity of employed finite element method and it can provide theoretical instruction for aluminum extrusion die design and technique parameters selection.
模拟结果表明所用有限体积法是有效的，可以为铝型材挤压的模具设计与工艺参数的选择提供理论指导。
In the validity of the bid regulated in the pre-attached table of the instruction to the bidder, the bidder cannot request to repeal or modify their bidding document.
在投标人须知前附表规定的投标有效期内，投标人不得要求撤销或修改其投标文件。
Based on the experiments, the reason of breakup and hardening technology are studied. The validity of instruction redundancy, software trap and watchdog for anti-breakup are validated by experiments.
在实验的基础上，分析了死机产生的原因及加固方法，并通过实验验证了指令冗余、软件陷阱和看门狗等措施对防止单片机死机的有效性。
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