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East Asian VLBI Network observations of active galactic nuclei jets:imaging with KaVA+Tianma+Nanshan

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Research in Astronomy and Astrophysics 2021年第8期21卷 220-234页

作者： Yu-Zhu Cui Kazuhiro Hada Motoki Kino Bong-Won Sohn Jongho Park Hyun-Wook Ro Satoko Sawada-Satoh Wu Jiang Lang Cui Mareki Honma Zhi-Qiang Shen Fumie Tazaki Tao An Ilje Cho Guang-Yao Zhao Xiao-Peng Cheng Kotaro Niinuma Kiyoaki Wajima Ying-Kang Zhang Noriyuki Kawaguchi Juan-Carlos Algaba Shoko koyama Tomoya Hirota Yoshinori Yonekura Nobuyuki Sakai Bo Xia Yong-Bin Jiang Lin-Feng Yu Wei Gou Ju-Yeon Hwang Yong-Chen Jiang Yun-Xia Sun Dong-Kyu Jung Hyo-Ryoung Kim Jeong-Sook Kim Hideyuki Kobayashi Jee-Won Lee Jeong-Ae Lee Hua Zhang Guang-Hui Li Zhi-Qiang Xu Peng Li Jung-Hwan Oh Se-Jin Oh Chung-Sik Oh Tomoaki Oyama Duk-Gyoo Roh Katsunori-M.Shibata Wen Guo Rong-Bing Zhao Wei-Ye Zhong Jin-Qing Wang Wen-Jun Yang Hao Yan Jae-Hwan Yeom Bin Li Xiao-Fei Li Jian-Ping Yuan Jian Dong Zhong Chen Kazunori Akiyama Keiichi Asada Do-Young Byun Yoshiaki Hagiwara Jeffrey Hodgson Tae-Hyun Jung Kee-Tae Kim Sang-Sung Lee Kunwoo Yi Qing-Hui Liu Xiang Liu Ru-Sen Lu Masanori Nakamura Sascha Trippe Na Wang Xue-Zheng Wang Bo Zhang Department of Astronomical Science The Graduate University for Advanced StudiesSOKENDAI2-21-1 OsawaMitakaTokyo 181-8588Japan Mizusawa VLBI Observatory National Astronomical Observatory of Japan2-12 HoshigaokaMizusawaOshuIwate 023-0861Japan Kogakuin University of Technology and Engineering Academic Support Center2665-1 NakanoHachiojiTokyo 192-0015Japan Korea Astronomy and Space Science Institute Yuseong-guDaejeon 34055Korea Department of Astronomy Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Korea Department of Astronomy and Space Science University of Science and Technology217 Gajeong-roDaejeonKorea Institute of Astronomy and Astrophysics Academia Sinica645 N Aohoku PIHiloHI 96720USA Graduate School of Sciences and Technology for Innovation Yamaguchi UniversityYoshida 1677-1YamaguchiYamaguchi 753-8512Japan Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China Institute of Astronomy The University of Tokyo2-21-1 OsawaMitakaTokyo 181-0015Japan Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomia s/nGranada E-18008Spain Department of Physics Faculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia Center for Astronomy Ibaraki University2-1-1 BunkyoMitoIbaraki 310-8512Japan Space Light Laboratory 77Yangjaedae-ro 86 roadGangdong-guSeoulKorea Massachusetts Institute of Technology Haystack Observatory 99 Millstone RoadWestfordMA 01886USA National Radio Astronomy Observatory 520 Edgemont RdCharlottesvilleVA 22903USA Toyo University 5-28-20 HakusanBunkyo-kuTokyo 112-8606Japan Department of Physics and Astronomy Seoul National UniversityGwanak-guSeoul 08826Korea Max Planck Institute for Radio Astronomy Auf dem hiigel 69Bonn 53121Germany SNU Astronomy Research Center Seoul National UniversityGwanak-guSeoul 08826Korea

The East Asian Very Long Baseline Interferometry(VLBI) Network(EAVN) is a rapidly evolving international VLBI array that is currently promoted under joint efforts among China,Japan and *** aims at forming a joint VLBI Network by combining a large number of radio telescopes distributed over East Asian *** the combination of the Korean VLBI Network(KVN) and the VLBI Exploration of Radio Astrometry(VERA) into Ka VA,further expansion with the joint array in East Asia is actively *** we report the first imaging results(at 22 and 43 GHz) of bright radio sources obtained with Ka VA connected to Tianma 65-m and Nanshan 26-m Radio Telescopes in *** test the EAVN imaging performance for different sources,we observed four active galactic nuclei(AGN) having different brightness and *** a result,we confirmed that the Tianma 65-m Radio Telescope(TMRT) significantly enhances the overall array sensitivity,a factor of 4 improvement in baseline sensitivity and 2 in image dynamic range compared to the case of Ka VA *** addition of the Nanshan 26-m Radio Telescope(NSRT) further doubled the east-west angular *** the resulting high-dynamic-range,high-resolution images with EAVN(Ka VA+TMRT+NSRT),various fine-scale structures in our targets,such as the counter-jet in M87,a kink-like morphology of the 3 C 273 jet and the weak emission in other sources are successfully *** demonstrates the powerful capability of EAVN to study AGN jets and to achieve other science goals in *** expansion of EAVN will further enhance the angular resolution,detection sensitivity and frequency coverage of the network.

关键词： galaxies:active galaxies:jets instrumentation:interferometers radio continuum:galaxies

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评估STIR自旋回波成像、扩散加权成像及氟代脱氧葡萄糖PET/CT胸部成像在诊断非小细胞肺癌N分期中定量及定性的效能

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国际医学放射学杂志 2012年第1期 78-78页

作者： Y.Ohno H.koyama T.Yoshikawa M.Nishio N.Aoyama Y.Onishi 刘靖 Department of Radiology Kobe University Graduate School of Medicine7-5-2 Kusunoki-choChuo-kuKobe 6500017Japan

目的前瞻性比较短反转时间及反转恢复(inversion-recovery,STIR)自旋回波(spin-echo,SE)成像、扩散加权(diffusion-weighted,DW)成像和氟代脱氧葡萄糖(fluorodeoxyglucose,FDG)PET/CT在评估非小细胞肺癌

关键词：脱氧葡萄糖 FDG STIR PET/CT NSCLC 氟代 CT

迭代重建技术和滤波反投影技术的比较:应用于低剂量薄层多层螺旋CT对伴或不伴慢性阻塞性肺疾病病人的气管的定量评估

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国际医学放射学杂志 2014年第5期 504-504页

作者： H.koyama Y.Ohno M.Nishio S.Matsumoto N.Sugihara T.Yoshikawa 吴爽 Division of Radiology Department of RadiologyKobeUniversity Graduate School of Medicine7-5-2 Kusunoki-choChuo-kuKobeHyogo 650-0017Japan

摘要目的本研究摘要目的是评价低剂量CT迭代重建技术(IR)替代常规剂量CT定量评估伴或不伴有慢性阻塞性肺疾病病人的气管。方法 50例病人(平均年龄69.2岁,1 s呼

关键词：迭代重建技术常规剂量低剂量慢性阻塞性肺疾病 CT 定量评估气管呼吸器官病人

校准剂量、低剂量和无剂量薄层影像检查:可疑肺结节病人中结节检出和结节分型评估能力的比较

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国际医学放射学杂志 2017年第5期 601-601页

作者： Y.Ohno Y.H.koyama T.Yoshikawa Y.Kishida S.Seki D.Takenaka 王臣 Division of Functional and Diagnostic Imaging Research Department of RadiologyAdvanced Biomedical Imaging Research CenterKobe University Graduate School of Medicine

摘要目的比较肺薄层超短回波时间(UTE)MRI与标准剂量和低剂量的薄层CT肺结节检出和结节分型评估的能力差异。材料与方法本研究获机构伦理委员会批准,病人均

关键词：低剂量 CT 标准剂量

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碳锰奥氏体钢的动态应变时效及伴生现象综述

水钢科技 2018年第4期 48-62页

作者： Motomichi koyama Takahiro SAWAGUCHI Kaneaki TSUZAKI 高长益(译) 叶雅妮(译) 张东升(译) 吴学林(译) 刘立德(译) 日本九州大学日本国家材料科学院首钢水钢制造管理部贵州六盘水553028

本文综述了有关哈德菲尔德钢和孪生诱导塑性钢的动态应变时效的最新研究结果。首先,根据Mn-C耦合和位错间隔原理,简要地介绍了一个动态应变时效机理模型及其控制因素,然后解释了动态应变时效对加工硬化能力、均匀延伸率、非均匀延伸率... 详细信息

本文综述了有关哈德菲尔德钢和孪生诱导塑性钢的动态应变时效的最新研究结果。首先,根据Mn-C耦合和位错间隔原理,简要地介绍了一个动态应变时效机理模型及其控制因素,然后解释了动态应变时效对加工硬化能力、均匀延伸率、非均匀延伸率和疲劳强度等力学性能的影响。特别是,我们注意到院(1)动态应变时效对加工硬化过程中扩展位错的钉扎作用;(2)动态应变时效对拉伸过程中断裂演变的波特文勒夏特利埃带状效应;(3)动态应变时效对疲劳抗裂性的裂纹尖端硬化及软化效应。我们相信这个综述对设计延展性和抗疲劳性优异的现代高强度钢具有指导作用。

关键词：动态应变时效加工硬化高Mn奥氏体钢早期断裂疲劳锯齿流动

全身MR、全身FDGPET/MR及全身FDGPET/CT3种成像的比较:对非小细胞肺癌病人TNM及临床分期评估效能的比较

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国际医学放射学杂志 2015年第4期 385-385页

作者： Y.Ohno H.koyama T.Yoshikawa D.Takenaka S.Seki M.Yui 高利珍 Advanced Biomedical Imaging Research Center Kobe University Graduate School of Medicine

摘要目的前瞻性地比较全身MR成像、有或无MRI信号强度(SI)评估的全身PET/MR成像及18F-FDG PET/CT成像评估非小细胞肺癌(NSCLC)病人TNM分期、临床分期及

关键词：临床分期 FDGPET/MR MR 全身 TNM CT

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铬镍亚稳奥氏体钢的疲劳性能

水钢科技 2019年第1期 49-61页

作者： Takuro OGAWA Motomichi koyama Yuri NISHIKURA Kaneaki TSUZAKI Hiroshi NOGUCHI 高长益(译) 叶雅妮(译) 张东升(译) 吴学林(译) 刘立德(译) 日本九州大学首钢水钢制造管理部贵州六盘水553028

采用旋转弯曲疲劳试验机测试了Fe-19Cr-8Ni-0.05C钢和Fe-19Cr-8Ni-0.14C钢的疲劳性能。两种钢的疲劳极限取决于裂纹萌生临界应力幅值。由于奥氏体的稳定性,Fe-19Cr-8Ni-0.05C钢的疲劳极限达到了200MPa,这比Fe-19Cr-8Ni-0.14C钢的疲劳极... 详细信息

采用旋转弯曲疲劳试验机测试了Fe-19Cr-8Ni-0.05C钢和Fe-19Cr-8Ni-0.14C钢的疲劳性能。两种钢的疲劳极限取决于裂纹萌生临界应力幅值。由于奥氏体的稳定性,Fe-19Cr-8Ni-0.05C钢的疲劳极限达到了200MPa,这比Fe-19Cr-8Ni-0.14C钢的疲劳极限要高。虽然Fe-19Cr-8Ni-0.14C钢的动态应变时效有望提高疲劳极限,但是,由于相稳定性的显著增大,抵消了相变诱发塑性和相变诱发裂纹闭合效应,没有出现动态应变时效提高疲劳极限的现象。

关键词：固溶碳奥氏体不锈钢相稳定动态应变时效疲劳