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Asian international grid connection and potentiality of DC superconducting power transmission

Global Energy Interconnection 2018年第1期1卷 11-19页

作者： Satarou Yamaguchi Takashi Iitsuka masashi osada Ryuichi Yokoyama Chubu University Matsumoto-cho 1200Kasugai487-8500AichiJapan JGC Corporation Minato Mirai 2-3-1Nishi-kuYokohama 220-6001Japan ABB K.K. Ohsaki 2-1-1Shinagawa-ku141-6022 TokyoJapan Energy and Environment Technology Research Institute 1-22-2 Nishiwaseda Shinjuku169-0051 TokyoJapan

In 2011, a large scale earthquake and tsunami hit the northeastern coast of Japan, and nuclear plants were damaged to a large extent. Before the Tsunami, 54 nuclear plants were operated, however presently, only three nuclear plants are in operation. Therefore, Japan is suffering from high price of electricity and low supply reliability. In generation mix, nuclear plants generate only one percent and 87 percent of electricity is generated by fossil energy. This is not preferable for Japan from the viewpoints of energy security and stable electricity supply. Therefore, it is mandatory to increase sustainable energy and to decrease consumption of fossil fuel. International grid connection and the Global Energy Interconnection will be one of countermeasures against these problems existing in Japan. In this paper, international grid connection initiatives proposed in Asia are described and features and issues of electric power grids in Japan are discussed to implement the international grid connection. As the key technology for implementing the international grid connection, the present status of DC superconducting power transmission lines and power converters for long-distance power transmission lines are presented. In conclusion, conditions and legal frameworks for realizing the international grid connection are described.

关键词： International grid connection Global Energy Interconnection Sustainable energy DC superconducting Power converter

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Temperature Distributions in Single Cell of Polymer Electrolyte Fuel Cell Simulated by an 1D Multi-plate Heat-Transfer Model and a 3D Numerical Simulation Model

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Journal of Energy and Power Engineering 2015年第8期9卷 687-704页

作者： Akira Nishimura masashi Baba Kotaro osada Takenori Fukuoka MasafumiHirota Eric Hu Division of Mechanical Engineering Graduate School of Engineering Mie University Tsu-city Mie 514-8507 Japan School of Mechanical Engineering The University of Adelaide Adelaide SA 5005 Australia

The purpose of this study is to verify an 1D multi-plate heat-transfer model estimating the temperature distribution on the interface between polymer electrolyte membrane and catalyst layer at cathode in single cell of polymer electrolyte fuel cell, which is named as reaction surface in this study, with a 3D numerical simulation model solving many governing equations on the coupling phenomena in the cell. The results from both models/simulations agreed well. The effects of initial operation temperature, flow rate, and relative humidity of supply gas on temperature distribution on the reaction surface were also investigated. It was found in both 1D and 3D simulations that, the temperature rise （i.e., Treact-Tini） of the reaction surface from initial operation temperature at 70℃ was higher than that at 80℃ irrespective of flow rate of supply gas. The effect of relative humidity of supply gas on Treact- Tini near the inlet of the cell was small. Compared to the previous studies conducted under the similar operation conditions, the Treact - Tini calculated by 1D multi-plate heat-transfer model in this study as well as numerical simulation using 3D model was reasonable.

关键词： Polymer electrolyte fuel cell 1D multi-plate heat-transfer model 3D numerical simulation model temperaturedistribution.

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多巴胺转运体SPECT显像中显像剂分布的定量分析有助于图像的客观解读

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中华核医学与分子影像杂志 2018年第10期38卷 712-712页

作者：刘颍桦(译) 唐军(审校) 苏州大学医学部放射医学与防护学院 215123 上海交通大学医学院附属苏州九龙医院核医学科 215021

目的多巴胺转运体（DAT） SPECT显像时，显像剂分布的定量分析能在视觉分析的基础上增加其客观性。该研究旨在评估显像剂分布的定量指标——分形维数（FD）的诊断作用，并将其与常规定量指标——特异性结合率（SBR）进行比较；同时评估S... 详细信息

目的多巴胺转运体（DAT） SPECT显像时，显像剂分布的定量分析能在视觉分析的基础上增加其客观性。该研究旨在评估显像剂分布的定量指标——分形维数（FD）的诊断作用，并将其与常规定量指标——特异性结合率（SBR）进行比较；同时评估SBR/FD组合指标（SBR除以FD）的诊断价值。方法行临床研究和模型研究。临床研究纳入150例患者，其中110例帕金森综合征（PS）患者和40例非PS患者。模型研究采用纹状体模型，将纹状体腔分为尾状核和壳核。计算SBR、FD和SBR/FD，并与数据库进行比较，以评估其诊断价值。采用Mann-Whitney检验和受试者工作特征（ROC）曲线分析法分析数据。结果ROC曲线分析表明，FD具有较高的诊断效能[曲线下面积（AUC）为0.943]，其与SBR和FD （SBR/FD）联合应用比单独使用SBR有更高的诊断效能（AUC：0.964与0.899; P〈0.001）。SBR的灵敏度、特异性和准确性分别为79.1%、85.0%和80.7%，FD对应为84.5%、97.5%和88.0%，SBR/FD对应为92.7%、87.5%和91.3%。结论FD是反映DAT SPECT显像时显像剂分布的有价值的诊断指标。FD与SBR联合应用比单独应用的诊断价值更高。

关键词： 123^Ⅰ-Ioflupane 123^Ⅰ-FP-CIT DAT 分形分析分形维数

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