Baifeng Chen

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—This paper presents a high-reliability single-phase transformerless grid-connected inverter that utilizes superjunc-tion MOSFETs to achieve high efficiency for photovoltaic applications. The proposed converter utilizes two split ac-coupled in-ductors that operate separately for positive and negative half grid cycles. This eliminates the shoot-through issue(More)
BACKGROUND Unsafe injection practices significantly increase the risk of human immunodeficiency virus (HIV) infection among injection drug users (IDUs). Little is known about how demographic characteristics of IDUs are linked to HIV-related risk behaviors in the central regions of China. METHODS A cross-sectional survey was conducted at Mandatory(More)
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