螺钉固定联合环扎术并联合锁定系统仍然是争议的。

Combining screw fixation with cerclage wires with a locking system remains controversial.

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本文研究了一般环状串联网络的可靠度最优布局（ROLA）问题，网络中的每个环由两条串联支路并联而成。

The problem discussed in this paper is about Reliability Optimum Link Allocation (ROLA) of the ordinary series chain network in which every chain is composed of two series-links connected in parallel.

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在本文使用的控制策略中，并联部分由PI控制和定时滞环比较PW M控制组成，而串联部分的控制则采用三角载波调制的PWM控制。

The parallel part control consists of a Proportion-Integral (PI) control and a regular time hysteresis PWM control. The Series part control adopts a triangle wine-linear PWM control.

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