The new three-phase 5-level current-source inverter (CSI) proposed in this paper was developed by connecting three separate single-phase 5-level CSIs in series, and its operational principle was analyzed. There are tw...The new three-phase 5-level current-source inverter (CSI) proposed in this paper was developed by connecting three separate single-phase 5-level CSIs in series, and its operational principle was analyzed. There are two major problems existing in current-source multilevel inverters, one is the complex PWM control method (2-logic to 3-logic conversion), and the other is the problem of current-unbalance between different levels. A simple current-balance control method via DC current feedback is applied in each single-phase 5-level CSI cell to implement the current-balance control between different levels. And to reduce the output current harmonics, POD PWM control technique was used. Simulation and experimental results showed that this new three-phase 5-level CSI topology operates correctly.展开更多
BACKGROUND Health utility assessments have been developed for various conditions,including chronic liver disease.Health utility scores are required for socio-economic evaluations,which can aid the distribution of nati...BACKGROUND Health utility assessments have been developed for various conditions,including chronic liver disease.Health utility scores are required for socio-economic evaluations,which can aid the distribution of national budgets.However,the standard health utility assessment scores for specific health conditions are largely unknown.AIM To summarize the health utility scores,including the EuroQOL 5-dimensions 5-levels(EQ-5D-5L),EuroQol-visual analogue scale,short from-36(SF-36),RAND-36,and Health Utilities Index(HUI)-Mark2/Mark3 scores,for the normal population and chronic liver disease patients.METHODS A systematic literature search of PubMed and MEDLINE,including the Cochrane Library,was performed.Meta-analysis was performed using the RevMan software.Multiple means and standard deviations were combined using the StatsToDo online web program.RESULTS The EQ-5D-5L and SF-36 can be used for health utility evaluations during antiviral therapy for hepatitis C.HUI-Mark2/Mark3 indicated that the health utility scores of hepatitis B patients are roughly 30% better than those of hepatitis C patients.CONCLUSION The EQ-5D-5L is the most popular questionnaire for health utility assessments.Health assessments that allow free registration would be useful for evaluating health utility in patients with liver disease.展开更多
Multilevel inverters are well used in grid connected domestic photovoltaic applications because of their ability to generate a very good quality of waveforms, reducing switching frequency, and their low voltage stress...Multilevel inverters are well used in grid connected domestic photovoltaic applications because of their ability to generate a very good quality of waveforms, reducing switching frequency, and their low voltage stress across the power devices. However, this kind of inverter has to be modified to both limit common-mode currents and improve the robustness of the system. This paper presents a new mixed 5-level inverter that meets these challenges. The operating principle of the converter is proposed. Several experimental measurements are described to validate this new concept. The output voltage and current and the THD of the output voltage are particularly discussed.展开更多
基金Project (No. 50477033) supported by the National Natural Science Foundation of China
文摘The new three-phase 5-level current-source inverter (CSI) proposed in this paper was developed by connecting three separate single-phase 5-level CSIs in series, and its operational principle was analyzed. There are two major problems existing in current-source multilevel inverters, one is the complex PWM control method (2-logic to 3-logic conversion), and the other is the problem of current-unbalance between different levels. A simple current-balance control method via DC current feedback is applied in each single-phase 5-level CSI cell to implement the current-balance control between different levels. And to reduce the output current harmonics, POD PWM control technique was used. Simulation and experimental results showed that this new three-phase 5-level CSI topology operates correctly.
基金Supported by Grants-in-Aid from JSPS KAKENHI,No.JP 20K10404(to Mizuguchi T)and No.JP 21K10715(to Ishinuki T)the Hokkaido Hepatitis B Litigation Orange Fund,No.2059198(to Mizuguchi T)and No.2136589(to Harada K)+14 种基金Terumo Life Science Foundation,No.2000666Pfizer Health Research Foundation,No.2000777the Viral Hepatitis Research Foundation of Japan,No.3039838Project Mirai Cancer Research Grants,No.202110251Takahashi Industrial and Economic Research Foundation,No.12-003-106Daiichi Sankyo Company,No.2109540Shionogi and Co.,No.2109493MSD,No.2099412Takeda Pharmaceutical Company,No.2000555Sapporo Doto Hospital,No.2039118Noguchi Hospital,No.2029083Doki-kai Tomakomai Hospital,No.2059203Tsuchida Hospital,No.2000092Shinyu-kai Noguchi Hospital,No.2029083(to Mizuguchi T)the Yasuda Medical Foundation,No.28-1(to Ishinuki T).
文摘BACKGROUND Health utility assessments have been developed for various conditions,including chronic liver disease.Health utility scores are required for socio-economic evaluations,which can aid the distribution of national budgets.However,the standard health utility assessment scores for specific health conditions are largely unknown.AIM To summarize the health utility scores,including the EuroQOL 5-dimensions 5-levels(EQ-5D-5L),EuroQol-visual analogue scale,short from-36(SF-36),RAND-36,and Health Utilities Index(HUI)-Mark2/Mark3 scores,for the normal population and chronic liver disease patients.METHODS A systematic literature search of PubMed and MEDLINE,including the Cochrane Library,was performed.Meta-analysis was performed using the RevMan software.Multiple means and standard deviations were combined using the StatsToDo online web program.RESULTS The EQ-5D-5L and SF-36 can be used for health utility evaluations during antiviral therapy for hepatitis C.HUI-Mark2/Mark3 indicated that the health utility scores of hepatitis B patients are roughly 30% better than those of hepatitis C patients.CONCLUSION The EQ-5D-5L is the most popular questionnaire for health utility assessments.Health assessments that allow free registration would be useful for evaluating health utility in patients with liver disease.
文摘Multilevel inverters are well used in grid connected domestic photovoltaic applications because of their ability to generate a very good quality of waveforms, reducing switching frequency, and their low voltage stress across the power devices. However, this kind of inverter has to be modified to both limit common-mode currents and improve the robustness of the system. This paper presents a new mixed 5-level inverter that meets these challenges. The operating principle of the converter is proposed. Several experimental measurements are described to validate this new concept. The output voltage and current and the THD of the output voltage are particularly discussed.
