This paper provides both vector control and frequency difference control to modulate the system of double motors transmission.

提出一种通过矢量控制和差频控制原理控制的双电机传动系统。

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Results: There was no significant difference in the allelic frequency of the DAT gene polymorphism between sporadic PD patients and unrelated-control subjects.

结果：研究结果指出在帕金森氏病患者和对照者之间的对偶基因频率并没有明显的差异性。

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Results: the mutation frequency of V245V in the control group and PKU group was 70.2 % and 79.5 % respectively. There was no significant difference between the two groups.

结果：对照组和苯酮尿症组该突变位点的基因频率分别为70.2％和79.5％，经统计学检验无显著性差异。

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