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Zhou Yongqin,Huang Ce,Chen Junjie,Shi Guijun,Zhou Meilan 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.6
Due to synchronous rectification based on Phase-shift full bridge converter is difficult to work in a state of soft switch, to solve this problem, this paper sets out an control approach of synchronous rectification based on the ZVZCS phase-shifted full-bridge, and the drive signal of synchronous rectification side uses leading-leg drive waveform after a certain time delay and applies the resonant principle in the switching process,not only keeping full bridge ZVZCS soft switching but also realizing MOSFET of the synchronous rectification ZVS. The simulation of saber and experimental research show that the converter has a good performance.
( Yuanyue Zhu ),( Long Wang ),( Lin Lin ),( Yanan Huo ),( Qin Wan ),( Yingfen Qin ),( Ruying Hu ),( Lixin Shi ),( Qing Su ),( Xuefeng Yu ),( Li Yan ),( Guijun Qin ),( Xulei Tang ),( Gang Chen ),( Shua 대한소화기학회 2024 Gut and Liver Vol.18 No.4
Background/Aims: Low educational attainment is a well-established risk factor for nonalcoholic fatty liver disease (NAFLD) in developed areas. However, the association between educational attainment and the risk of NAFLD is less clear in China. Methods: A cross-sectional study including over 200,000 Chinese adults across mainland China was conducted. Information on education level and lifestyle factors were obtained through standard questionnaires, while NAFLD and advanced fibrosis were diagnosed using validated formulas. Outcomes included the risk of NAFLD in the general population and high probability of fibrosis among patients with NAFLD. Logistic regression analysis was employed to estimate the risk of NAFLD and fibrosis across education levels. A causal mediation model was used to explore the potential mediators. Results: Comparing with those receiving primary school education, the multi-adjusted odds ratios (95% confidence intervals) for NAFLD were 1.28 (1.16 to 1.41) for men and 0.94 (0.89 to 0.99) for women with college education after accounting for body mass index. When considering waist circumference, the odds ratios (95% CIs) were 0.94 (0.86 to 1.04) for men and 0.88 (0.80 to 0.97) for women, respectively. The proportions mediated by general and central obesity were 51.00% and 68.04% for men, while for women the proportions were 48.58% and 32.58%, respectively. Furthermore, NAFLD patients with lower educational attainment showed an incremental increased risk of advanced fibrosis in both genders. Conclusions: In China, a low education level was associated with a higher risk of prevalent NAFLD in women, as well as high probability of fibrosis in both genders. (Gut Liver 2024;18:719-728)