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Control method for the stable operation of distributed inverters following the introduction of large-scale renewable energy to a remote island grid

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Clean Energy 2021年第2期5卷 196-207页

作者： shoichi sato Yasuhiro Noro Department of Electrical and Electronic Engineering Kogakuin University1-24-2 Nishi-ShinjukuShinjuku-kuTokyo 163-8677Japan

The introduction of large-scale renewable energy requires a control system that can operate multiple distributed inverters in a stable way.This study proposes an inverter control method that uses information corresponding to the inertia of the synchronous generator to coordinate the operation of battery energy storage systems.Simulation results for a system with multiple inverters applying the control method are presented.Various faults such as line-to-line short circuits and three-phase line-to-ground faults were simulated.Two fault points with different characteristics were compared.The voltage,frequency and active power quickly returned to their steady-state values after the fault was eliminated.From the obtained simulation results,it was verified that our control method can be operated stably against various faults.

关键词： renewable energy photovoltaic battery energy storage system inverter remote island

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混合动力汽车中的电机控制技术

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电力电子 2005年第2期3卷 26-31,58页

作者： shoichi Sasaki Eiji sato Masaki Okamura

丰田Prius是世界上第一款大规模生产的混台动力乘用车,本文对混合动力汽车特别是Prius作了简要的介绍。文中对Prius中采用的一些电机控制技术,如方波电压调制技术、过调制和使用的电压变换器都一一作了介绍。基于这些技术,Prius的输出... 详细信息

丰田Prius是世界上第一款大规模生产的混台动力乘用车,本文对混合动力汽车特别是Prius作了简要的介绍。文中对Prius中采用的一些电机控制技术,如方波电压调制技术、过调制和使用的电压变换器都一一作了介绍。基于这些技术,Prius的输出功率得到了显著提高。最后,展望了未来汽车发展要求对现有技术的挑战。

关键词：异步电机矢量控制电机控制技术混合动力汽车丰田Prius 大规模生产电压变换器调制技术方波电压输出功率

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Repetitive administration of cultured human CD34+cells improve adenine-induced kidney injury in mice

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World Journal of Stem Cells 2023年第4期15卷 268-280页

作者： Takayasu Ohtake shoichi Itaba Amankeldi A Salybekov Yin Sheng Tsutomu sato Mitsuru Yanai Makoto Imagawa Shigeo Fujii Hiroki Kumagai Masamitsu Harata Takayuki Asahara Shuzo Kobayashi Regenerative Medicine The Center for Cell Therapy&Regenerative MedicineShonan Kamakura General HospitalKamakura 247-8533KanagawaJapan Kidney Disease and Transplant center Shonan Kamakura General HospitalKamakura 247-8533KanagawaJapan Regenerative Medicine Shonan Research Institute of Innovative MedicineKamakura 247-8533KanagawaJapan Kamakura Techno-science Inc. Kamakura 248-0036Japan Advanced Medicine Science Tokai University School of MedicineIsehara 259-1193Japan Department of Pathology Sapporo Tokushukai HospitalSapporo 004-0041Japan Department of Pathology Sapporo Medical CenterSapporo 004-0041Japan Human Life CORD Japan Inc Chuo-ku 103-0012TokyoJapan Cell Processing and Cell/Genome Analysis Center The Center for Cell Therapy&Regenerative MedicineShonan Kamakura General HospitalKamakura 247-8533KanagawaJapan Kidney Disease and Transplant Center Shonan Kamakura General HospitalKamakura 247-8533KanazawaJapan

BACKGROUND There is no established treatment to impede the progression or restore kidney function in human chronic kidney disease(CKD).AIM To examine the efficacy of cultured human CD34+cells with enhanced proliferating potential in kidney injury in mice.METHODS Human umbilical cord blood(UCB)-derived CD34+cells were incubated for one week in vasculogenic conditioning medium.Vasculogenic culture significantly increased the number of CD34+cells and their ability to form endothelial progenitor cell colony-forming units.Adenineinduced tubulointerstitial injury of the kidney was induced in immunodeficient non-obese diabetic/severe combined immunodeficiency mice,and cultured human UCB-CD34+cells were administered at a dose of 1×106/mouse on days 7,14,and 21 after the start of adenine diet.RESULTS Repetitive administration of cultured UCB-CD34+cells significantly improved the time-course of kidney dysfunction in the cell therapy group compared with that in the control group.Both interstitial fibrosis and tubular damage were significantly reduced in the cell therapy group compared with those in the control group(P<0.01).Microvasculature integrity was significantly preserved(P<0.01)and macrophage infiltration into kidney tissue was dramatically decreased in the cell therapy group compared with those in the control group(P<0.001).CONCLUSION Early intervention using human cultured CD34+cells significantly improved the progression of tubulointerstitial kidney injury.Repetitive administration of cultured human UCB-CD34+cells significantly improved tubulointerstitial damage in adenine-induced kidney injury in mice via vasculoprotective and anti-inflammatory effects.

关键词： Chronic kidney disease CD34+cell Adenine Tubulointerstitial injury Quality and quantity control culture Umbilical cord blood

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Decreased levels of plasma adiponectin associated with increased risk of colorectal cancer

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World Journal of Gastroenterology 2010年第10期16卷 1252-1257页

作者： Sayaka Otake Hiroaki Takeda shoichiro Fujishima Tadahisa Fukui Tomohiko Orii Takeshi sato Yu Sasaki shoichi Nishise Sumio Kawata Department of Gastroenterology Yamagata University Faculty of Medicine Division of Endoscopy Yamagata University Hospital

AIM:To investigate the association between adiponectin levels and risk of colorectal adenoma and cancer (early and advanced).METHODS: A cross-sectional study in a cohort of hospital-based patients was conducted between January 2004 and March 2006 at Yamagata University Hospital. Male subjects, who had colorectal tumors detected by endoscopic examination, were enrolled according to inclusion and exclusion criteria. Based on the T factor of the TNM system, intraepithelial carcinoma and submucosally invasive carcinoma were def ined as early cancer, and invasion into the muscularis propria or deeper was defined as advanced cancer. The plasma levels of glucose, insulin, total cholesterol, triglyceride, high sensitivity C-reactive protein, insulin like growth factor (IGF)-1, IGF binding protein-3, adiponectin, leptin, and resistin were measured. Each factor level was designated low or high, and the risk of adenoma or cancer was estimated by univariate and multivariate logistic regression analysis.RESULTS: We enrolled 124 male subjects (47 with adenoma, 34 with early cancer, 17 with advanced cancer, and 26 without tumors as controls). In patients with adenoma, high triglyceride and low adiponectin were associated with a significant increase in the odds ratio (OR) by univariate analysis. Only a low adiponectin level was related to increased adenoma risk, with an adjusted OR for low level (<11 μg/mL) to high (≥11 μg/mL) of 5.762 (95% confidence interval (CI):1.683-19.739, P=0.005). In the patients with early cancer, high body mass index, high triglyceride, and low adiponectin were associated with a significant increase in OR in univariate analysis. Imultivariate analysis, only low adiponectin was significantly associated with early cancer, with an adjusted OR of 4.495 (95% CI:1.090-18.528, P=0.038). However, in patients with advanced cancer, low adiponectin was not recognized as a significant risk factor for advanced cancer.CONCLUSION: A decreased level of adiponectin is strongly associated with an increased risk of color

关键词： Adenoma Early colorectal cancer Metabolic syndrome Adipokines Colonoscopy Resistin Leptin Body mass index

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