This paper described the primary analysis of a new model helicopter ground resonance in taking off and landing by employed classical spatial dynamic model.
对某新型直升机垂直起落状态“地面共振”初步分析，采用经典的空间动力模型进行计算。
Relatively very great limitation carried on technological innovation policy under the new classical economic model. So this text was carried on under the frame of Comparative Institutional Analysis.
在新古典经济模型下进行技术创新政策的比较具有很大的局限性，因此本文是在比较制度分析的框架下进行的。
Through analysis of classical DPC, a new switch table can be deduced which promote the efficiency of reactive power control of PWM rectifier.
通过对传统直接功率控制的分析，推导出一个新的开关表，可以显著地改进PWM整流器的无功功率控制性能。
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