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Domestic PV System with Feedback Linearization-based Control Strategy for Module-level MPPT under Partial Shading Condition

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Journal of Modern Power Systems and Clean Energy 2021年第6期9卷 1530-1539页

作者： Hamidreza Toodeji shahram aghaei Department of Electrical Engineering Yazd University

A partial shading condition can adversely affect the energy conversion efficiency of domestic photovoltaic(PV) systems. Connecting each PV module to a microinverter and performing module-level maximum power point tracking(MPPT)are proposed as promising solutions. In this paper, a feedback linearization-based control strategy is designed for the nonlinear system by a novel straightforward approach. The obtained nonlinear control law can independently govern each microinverter, providing module-level MPPT for PV modules without DC optimizer. Moreover, PV modules can be easily connected or disconnected due to the lug-and-play ability of the proposed controller. As a result, the proposed PV system can be easily maintained and extended even by non-expert users. Moreover,any module failure in the proposed PV system can be tolerated without impacts on the normal operation of other PV *** advantages of the proposed control strategy are verified by the simulation of a test PV system in MATLAB/Simulink under various partial shading conditions as well as adding or removing PV modules.

关键词： Domestic photovoltaic(PV)system microinverter power optimizer module-level maximum power point tracking(MPPT) plug-and-play feedback linearization-based control strategy

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Sex bias in response to hepatitis B vaccination in end-stage renal disease patients:Meta-analysis

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World Journal of Nephrology 2016年第1期5卷 115-124页

作者： Hossein Khedmat Aghdas aghaei Mohammad Ebrahim Ghamar-Chehreh shahram Agah Baqiyatallah Research Center for Gastroen- terology and Liver Disease Baqiyatallah University of Medical Sciences Colorectal Research Center Iran University of Medical Sciences

AIM: To systematically review the literature for studies investigating the potential effect of gender of dialysis patients on the immunogenicity of hepatitis B virus ***: Literature searches were conducted by the MEDLINE and Google Scholar. The key words used included "hepatitis B(HB)", "vaccine", "dialysis", "hemodialysis", "sex", "male" and "female". Data of seroresponse to HB vaccine in clinical trials regarding sex of the recipients have been achieved and analyzed. Finally data from 19 clinical trials have been pooled and ***: Analysis of response to HB vaccination in our dialysis population showed males significantly respond less to hepatitis B vaccination(P = 0.002, Z = 3.08) with no significant heterogeneity detected [P = 0.766; heterogeneity χ2 = 14.30(df = 19); I2 = 0%]. A reanalysis of the pooled data was conducted regarding the dialysis mode to evaluate potential differential impact of sex on HB vaccine response. Hemodialysis was the only subgroup that showed a significant difference regarding dialysis mode in response to HB vaccination regarding sex(P = 0.042, Z = 2.03).CONCLUSION: This Meta-analysis showed significant effect for the sex of chronic kidney disease and dialysis patients on the immunogenicity of HB vaccine. This sex discrimination was most prominent among hemodialysis patients.

关键词：患者乙肝治疗方法临床分析

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