VVB

This dissertation proposes a novel control method that regulates the output voltage to vary with input voltage rms change ( VVB).

本文提出一种新的控制方式，保证输出电压随输入电压的变化而线性改变。

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[ Results] In both non-VVB group and VVB group, postoperative serum Cr and BUN were higher than the preoperative values, respectively ( P < 0.05).

结果非转流组与转流组术后血清Cr和BUN均明显高于术前（P<0.05）；

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Question : How old were you when you moved from VV Bedum to FC Groningen?

你几岁的时候从VVBedum搬到格罗宁根?

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And thus less blood transfusion during the operation compared with standard technique of OLT with routine use of VVB. The occurrence rate of biliary complications was 5.98% and vascular complication 8.96%.

术后胆道并发症的发生率为5.98%，血管并发症的发生率为8.96%。

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Conclusions: Decreasing the operation time and stability of hemodynamics in anhepatic phase are the keys for success in OLTs without VVB.

结论：手术中无肝期时间的缩短及血流动力学的相对稳定是非转流条件下猪原位肝移植成功的关键。

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When PFC stage uses VVB control, in order to reduce the input voltage range of the next DC-DC stage, this dissertation proposes a hybrid Boost PFC converter.

当PFC级采用变输出电压控制后，为了减小后级变换器的输入电压范围，本文提出一种复合式PFC变换器。

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