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The Medium Energy X-ray telescope (ME) onboard the Insight-HXMT astronomy satellite

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Science China(Physics,Mechanics & Astronomy) 2020年第4期63卷 35-48页

作者： XueLei Cao WeiChun Jiang Bin Meng WanChang Zhang Tao Luo Sheng yang ChunLei Zhang YuDong Gu Liang Sun XiaoJing Liu JiaWei yang Xian Li Ying Tan ShaoZhen Liu YuanYuan Du FangJun Lu YuPeng Xu Ju Guan ShuangNan Zhang HuanYu Wang TiPei Li ChengMo Zhang Xiangyang Wen JinLu Qu LiMing Song XiaoBo Li MingYu Ge YuPeng Zhou ShaoLin Xiong Shu Zhang YongJie Zhang ZeHao Cheng Fei Zhang MaoShun Li XiaoHua Liang Min Gao EnBo yang XiaoHang Liu HongWei Liu yijung yang Fan Zhang Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Engineering Physics Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Space Thermal Control Technology Beijing Institute of Spacecraft System EngineeringBeijing 100094China Department of Modern Physics School of Physical SciencesUniversity of Science and Technology of ChinaHefei 230022China School of Physical Sciences Guizhou UniversityGuivang 550025China School of Opto-Electronic Information Science and Technology Yantai UniversityYantai 264005China University of Chinese Academy of Sciences Beijing 100049China

The Medium Energy X-ray telescope(ME) is one of the three main telescopes on board the Insight hard X-ray modulation telescope(Insight-HXMT) astronomy satellite. ME contains 1728 pixels of Si-PIN detectors sensitive in 5-30 ke V with a total geometrical area of 952 cm^2. The application specific integrated circuit(ASIC) chip, VA32TA6, is used to achieve low power consumption and low readout noise. The collimators define three kinds of field of views(FOVs) for the telescope, 1°×4°, 4°×4°,and blocked ones. Combination of such FOVs can be used to estimate the in-orbit X-ray and particle background *** energy resolution of ME is ~3 ke V at 17.8 ke V(FWHM) and the time resolution is 255 μs. In this paper, we introduce the design and performance of ME.

关键词： Si-PIN ASIC medium energy X-ray

The High Energy X-ray telescope (HE) onboard the Insight-HXMT astronomy satellite

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Science China(Physics,Mechanics & Astronomy) 2020年第4期63卷 20-34页

作者： CongZhan Liu YiFei Zhang XuFang Li XueFeng Lu Zhi Chang ZhengWei Li AiMei Zhang YongJie Jin HuiMing Yu Zhao Zhang MinXue Fu YiBao Chen JianFeng Ji YuPeng Xu JingKang Deng RenCheng Shang GuoQing Liu FangJun Lu ShuangNan Zhang YongWei Dong TiPei Li Mei Wu yanguo Li HuanYu Wang BoBing Wu YongJie Zhang Zhi Zhang ShaoLin Xiong Yuan Liu Shu Zhang HongWei Liu yijung yang Fan Zhang Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Engineering Physics Tsinghua UniversityBeijing 100084China Department of Physics Tsinghua UniversityBeijing 100084China University of Chinese Academy of Sciences Beijing 100049China

The Insight-Hard X-ray Modulation Telescope(Insight-HXMT) is a broadband X-ray and γ-ray(1-3000 ke V) astronomy satellite. One of its three main telescopes is the High Energy X-ray telescope(HE). The main detector plane of HE comprises 18 Na I(Tl)/Cs I(Na) phoswich detectors, where Na I(Tl) is used as the primary detector to measure ~ 20-250 ke V photons incident from the field of view(FOV) defined by collimators, and Cs I(Na) is used as the active shielding detector to Na I(Tl) by pulse shape discrimination. Additionally, Cs I(Na) is used as an omnidirectional γ-ray monitor. The HE collimators have a diverse FOV,i.e. 1.1°×5.7°(15 units), 5.7°×5.7°(2 units), and blocked(1 unit). Therefore, the combined FOV of HE is approximately5.7°×5.7°. Each HE detector has a diameter of 190 mm resulting in a total geometrical area of approximately 5100 cm2, and the energy resolution is ~15% at 60 ke V. For each recorded X-ray event by HE, the timing accuracy is less than 10 μs and the deadtime is less than 10 μs. HE is used for observing spectra and temporal variability of X-ray sources in the 20-250 ke V band either by pointing observations for known sources or scanning observations to unveil new sources. Additionally, HE is used for monitoring the γ-ray burst in 0.2-3 Me V band. This paper not only presents the design and performance of HE instruments but also reports results of the on-ground calibration experiments.

关键词： X-ray telescope HXMT calibration scintillation detector

The Impacts of Co-creation of Local Culture English Books on EFL 5th Graders＇ English Vocabulary Ability and Local Cultural Knowledge

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Journal of Literature and Art Studies 2016年第7期6卷 828-848页

作者： Hsieh yijung Chen Chinfen Wen-aou Elementary School Pinghu County Taiwan National Taipei University of Education Taipei Taiwan

The purpose of this study aims to explore the impacts of task-based co-creation of local picture books on facilitating the development of vocabulary ability and cultural knowledge ofEFL 5th graders with different English proficiency levels in Taiwan. Twenty-one 5th graders participated in this study forty minutes per week, lasting for sixteen weeks. They were required to co-create English picture books of Pinghu through thematic task-based activities. Research data required for the study were collected through the pre-/post-tests of vocabulary and cultural knowledge, a participants＇ feedback questionnaire as well as semi-structured interviews. The results of this study showed that after experimental instruction, EFL 5th graders significantly improved their recognition of the connection between English word sounds and word meanings, word meanings and word forms, word forms and word meanings, as well as spellings. Moreover, their local cultural knowledge was improved significantly as well. Furthermore, based upon the 5th graders＇ responses to questionnaire and semi-structure interview, most of them developed a very positive attitude towards the activities of co-creating local picture books and their interest, self-confidence in English writing, and English learning behavior. Based on the findings, some suggestions were offered for the pedagogical applications and future studies.

关键词： thematic writing task-based co-creation of picture books vocabulary ability cultural knowledge English learning attitude

MRI与经阴道彩超在早期宫颈癌术前评估中对照研究

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临床放射学杂志 2017年第1期36卷 91-94页

作者：高义军李娜刘春兰何萍华北理工大学附属开滦总医院妇产科唐山063000 石家庄妇产医院超声科

目的比较MRI和经阴道彩色多普勒超声(TVUS)在早期宫颈癌术前评估中的应用价值。方法回顾性分析35例经手术病理证实的早期宫颈癌患者(临床分期为Ⅰb和Ⅱa期)的MRI及TVUS资料,统计分析单独应用MRI、TVUS及两者联合应用在早期宫颈癌术前评... 详细信息

目的比较MRI和经阴道彩色多普勒超声(TVUS)在早期宫颈癌术前评估中的应用价值。方法回顾性分析35例经手术病理证实的早期宫颈癌患者(临床分期为Ⅰb和Ⅱa期)的MRI及TVUS资料,统计分析单独应用MRI、TVUS及两者联合应用在早期宫颈癌术前评估的准确率。结果肿瘤直径、宫颈间质浸润、宫旁受累3项指标准确率两者差异无统计学意义(P>0.05),在阴道受侵准确率方面,MRI明显优于TVUS,两者差异具有统计学意义(P0.05),TVUS灵敏度明显高于MRI,特异度低于MRI。在5项指标中,联合应用准确率明显优于单一检查,差异具有统计学意义(P<0.05)。结论 MRI和TVUS在早期宫颈癌诊断中各有优势,联合应用显著提高术前评估的准确率。

关键词：核磁共振成像超声成像术前评估宫颈癌