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This study investigated the effect of three filler metals, namely ER5356, ER5183, and ER5556, and various postwelding heat treatments, including natural aging, artificial aging, T6 and T73, on mechanical properties of AA7005 and AA7003 alloys. Microhardness in the fusion zone, heat-affected zone, and base metal were measured. Both scanning electron microscopy and transmission electron microscopy analyses...
The aim of this paper is to determine if autophagic cell death is associated with apoptosis and whether it participates in the process of term amniotic rupture. Forty pieces of fresh term amnions, including twenty from a position near the margin of the placentas and twenty from the margin of the naturally ruptured part of the placentas in term gestation were collected, respectively. The amnions were...
In this paper, a modified SEPIC converter is presented to function as a power factor corrector (PFC). The modified SEPIC-type PFC not only can achieve unity power factor but reduce DC-link voltage to release component stresses. Therefore, it is suitable for high line-voltage applications. A soft-switching cell composed of an active switch and an inductor-capacitor resonant circuit is embedded into...
This paper presents design and implementation of a paralleled inverter system with failure isolation and hot-swap features. The system is controlled with a system control unit (SCU) to achieve output voltage regulation, inverter synchronization and the above-mentioned features. By incorporating a current weighting distribution control, the system allows inverters with different power ratings connected...
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