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Progress on SVOM Satellite Development
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作者 wei jianyan 《空间科学学报》 CAS CSCD 北大核心 2024年第4期690-691,共2页
SVOM(Space-based multiband Variable Object Monitor)is a Chinese-French space mission mainly designed to study Gamma-Ray Bursts.The satellite carries four instruments to detect and localize the prompt GRB emission and ... SVOM(Space-based multiband Variable Object Monitor)is a Chinese-French space mission mainly designed to study Gamma-Ray Bursts.The satellite carries four instruments to detect and localize the prompt GRB emission and measure the evolution of the afterglow in the visible band and in soft X-rays,and a VHF communication system enables the fast transmission of SVOM alerts to the ground.The ground segment includes an array of wide-angle cameras and two follow-up telescopes.It was launched into an orbit of about 635 km on 22 June 2024,with three years of nominal operations and an extension of two years. 展开更多
关键词 Space astronomy Gamma-ray burst
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腹腔镜胆囊切除术在肝硬化合并肝胆结石患者中的应用效果分析
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作者 鲁阳春 魏剑焰 许煜新 《中外医疗》 2024年第22期48-51,共4页
目的探究对肝硬化合并肝胆结石患者采用腹腔镜胆囊切除术的治疗效果。方法简单随机选取2021年7月—2023年7月福州市长乐区人民医院收治的60例肝硬化合并肝胆结石患者为研究对象,根据不同治疗方法分成观察组和对照组,各30例。观察组采用... 目的探究对肝硬化合并肝胆结石患者采用腹腔镜胆囊切除术的治疗效果。方法简单随机选取2021年7月—2023年7月福州市长乐区人民医院收治的60例肝硬化合并肝胆结石患者为研究对象,根据不同治疗方法分成观察组和对照组,各30例。观察组采用腹腔镜胆囊切除术;对照组采用小切口胆囊切除术。比较两组患者的手术相关指标、并发症发生率、生活质量评分。结果观察组手术时间为(93.64±5.64)min、术后排气时间为(1.14±0.42)d、住院时间为(8.52±2.62)d、下床活动时间为(1.13±0.26)d,均短于对照组的(120.25±4.52)min、(1.56±0.52)d、(11.54±3.64)d、(1.34±0.31)d,差异有统计学意义(t=20.165、3.441、3.688、2.842,P均<0.05);观察组术中出血量低于对照组,差异有统计学意义(P<0.05)。观察组并发症发生率低于对照组,差异有统计学意义(P<0.05)。治疗后4周,观察组生活质量评分高于对照组,差异有统计学意义(P<0.05)。结论在治疗肝硬化合并肝胆结石患者时采取腹腔镜胆囊切除术相比于小切口胆囊切除术具有创伤小、术后康复快的特点,可降低并发症发生率,提高生活质量。 展开更多
关键词 肝硬化 肝胆结石 腹腔镜 胆囊切除术 并发症
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中法天文卫星(SVOM)伽玛暴联合探测任务 被引量:3
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作者 余舜京 GONZALEZ Fran?ois +2 位作者 魏建彦 张双南 CORDIER Bertrand 《空间科学学报》 CAS CSCD 北大核心 2019年第6期800-808,共9页
中法天文卫星SVOM是中法两国合作的伽玛暴探测任务,由中国国家航天局(CNSA)和法国国家空间研究中心(CNES)批准立项,中国科学院负责总体研制.SVOM是继美国SWIFT任务之后最重要的伽玛暴多波段探测项目,是一颗功能强大的天文卫星,具有多波... 中法天文卫星SVOM是中法两国合作的伽玛暴探测任务,由中国国家航天局(CNSA)和法国国家空间研究中心(CNES)批准立项,中国科学院负责总体研制.SVOM是继美国SWIFT任务之后最重要的伽玛暴多波段探测项目,是一颗功能强大的天文卫星,具有多波段观测、快速机动、灵活操作及地面后随观测能力.SVOM将开创一个非常广阔的探测领域.本文介绍了项目组织、任务目标、卫星和有效载荷、地面段以及运控概念. 展开更多
关键词 中法天文卫星 伽玛暴 光学望远镜 伽玛射线监视器 硬X射线相机 软X射线望远镜
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Brief Introduction about the SVOM Mission 被引量:1
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作者 wei jianyan 《空间科学学报》 CAS CSCD 北大核心 2018年第5期656-656,共1页
SVOM is a mission dedicated for studying γ-Ray Bursts, and will also be a powerful target-ofopportunity observatory for the whole astronomy community. The mission has been approved jointly by both Chinese and French ... SVOM is a mission dedicated for studying γ-Ray Bursts, and will also be a powerful target-ofopportunity observatory for the whole astronomy community. The mission has been approved jointly by both Chinese and French space agencies. It is planned to be in the orbit in 2021 with an altitude ≤600 km and an inclination ≤30°. 展开更多
关键词 通报 空间机构 天文学 天文台
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Progress on SVOM Satellite Development
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作者 wei jianyan 《空间科学学报》 CAS CSCD 北大核心 2020年第5期698-699,共2页
SVOM(Space-based multiband astronomical Variable Objects Monitor)is a Chinese-French space mission dedicated to studying Gamma-Ray Bursts.The satellite has four instruments to detect and localize the prompt GRB emissi... SVOM(Space-based multiband astronomical Variable Objects Monitor)is a Chinese-French space mission dedicated to studying Gamma-Ray Bursts.The satellite has four instruments to detect and localize the prompt GRB emission and measure the evolution of the afterglow in the visible band and in X-rays,and a VHF communication system enabling the fast transmission of SVOM alerts to the ground.The ground segment includes an array of wide-angle cameras and two follow-up telescopes.It was planned to be in orbit in 2021,and now has to be delayed about six months because of COVID-19 epidemic. 展开更多
关键词 Space astronomy Gamma-ray burst
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术前新辅助同步放化疗治疗局部晚期中低位直肠癌的临床效果
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作者 魏剑焰 郭澎 《潍坊医学院学报》 2020年第6期413-415,共3页
目的分析术前新辅助同步放化疗在治疗局部晚期中低直肠癌的临床效果。方法回顾性分析40例行术前新辅助同步放化疗的局部晚期中低位直肠癌患者的临床资料(观察组),并与同期常规手术治疗的40例局部晚期中低位直肠癌患者的临床资料(对照组... 目的分析术前新辅助同步放化疗在治疗局部晚期中低直肠癌的临床效果。方法回顾性分析40例行术前新辅助同步放化疗的局部晚期中低位直肠癌患者的临床资料(观察组),并与同期常规手术治疗的40例局部晚期中低位直肠癌患者的临床资料(对照组)比较。所有患者均给予规范手术治疗。结果与新辅助同步放化疗前分期比较,35例患者术后TNM分期降低,5例未见明显改变。观察组中35例行直肠癌前切除术(Dixon术),3例行腹-会阴联合直肠癌根治术(Miles术),2例行经腹直肠癌切除、近端造口、远端封闭术(Hartmann手术),差异有统计学意义(χ^(2)=6.722,P=0.035)。根治性手术切除率为95.00%,保肛率为87.50%,术后并发症发生率为15.00%,观察组复发率为17.50%,对照组复发率为37.50%,差异有统计学意义(χ^(2)=4.013,P=0.045,P<0.05)。结论术前新辅助同步放化疗治疗局部晚期中低直肠癌安全有效,可以降低肿瘤分期,提高保肛率,降低术后复发率,改善患者生活质量。 展开更多
关键词 直肠肿瘤 同步放化疗 新辅助疗法 临床疗效
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Detecting the intrinsic Baldwin Effect of the optical FeII complex in Luminous Seyfert 1 Galaxy Fairall 9
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作者 HAN XuHui WANG Jing +2 位作者 wei jianyan YANG Dawei HOU JinLiang 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第2期346-354,共9页
We analyze the optical spectra of Fairall 9,a luminous Seyfert 1 galaxy.They are obtained from the AGN Watch program that has monitored this object for 9 months.The flux and variation of the optical FeII complex is me... We analyze the optical spectra of Fairall 9,a luminous Seyfert 1 galaxy.They are obtained from the AGN Watch program that has monitored this object for 9 months.The flux and variation of the optical FeII complex is measured using multi-component profile modeling with FeⅡ templates.A convincing intrinsic Baldwin Effect(BEff) of optical FeⅡ emission blends in Fairall 9 is discovered for the first time.The variation of FeⅡ/Hβ(RFe) in Fairall 9 is obtained.We also detect a marginal anti-correla tion between RFe and the continuum flux in its spectra.This anti-correlation and the relatively broad profile of Hβ in this galaxy support the dichotomy reported by Wang et al.(2005). 展开更多
关键词 active galactic nuclei QUASARS Seyfert galaxies H regions emission lines Fairall 9
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LUT:A Lunar-based Ultraviolet Telescope
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作者 CAO Li RUAN Ping +10 位作者 CAI HongBo DENG JinSong HU JingYao JIANG XiaoJun LIU ZhaoHui QIU YuLei WANG Jing WANG Shen YANG JianFeng ZHAO Fei wei jianyan 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第3期558-562,共5页
The Lunar-based Ultraviolet Telescope (LUT) is a funded lunar-based ultraviolet telescope dedicated to continuously monitor- ing variable stars for as long as dozens of days and performing low Galactic latitude sky ... The Lunar-based Ultraviolet Telescope (LUT) is a funded lunar-based ultraviolet telescope dedicated to continuously monitor- ing variable stars for as long as dozens of days and performing low Galactic latitude sky surveys. The slow and smooth spin of the Moon makes its step by step pointing strategy possible. A flat mirror mounted on a gimbal mount is configured to enlarge the sky coverage of the LUT. A Ritehey-Chretien telescope with a Nasmyth focus configuration is adopted to reduce the total length of the system. A UV enhanced back illuminated AIMO CCD 47-20 chip together with the low noise electric design will minimize the instrumental influence on the system. The preliminary proposal for astrometric calibration and photometric cali- bration are also presented. 展开更多
关键词 ULTRAVIOLET space-based ultraviolet telescope photometric instrumentation lunar probe
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A quasar possibly ejected from NGC4579
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作者 ZHU Xingfen CHU Yaoquan +2 位作者 wei jianyan ZHANG Haotong HU Jingyao 《Chinese Science Bulletin》 SCIE EI CAS 2000年第10期886-888,共3页
With the 2.16 m telescope at Beijing Astronomical Observatory, it is identified that a compact X-ray source detected by ROSAT located in the vicinity of 5’ .9 from the LINER galaxy NGC4579 is a quasar with a redshift... With the 2.16 m telescope at Beijing Astronomical Observatory, it is identified that a compact X-ray source detected by ROSAT located in the vicinity of 5’ .9 from the LINER galaxy NGC4579 is a quasar with a redshift z = 0.106. A further analysis indicates that this quasar is possibly ejected from NGC4579. 展开更多
关键词 quasar-galaxy-redshift.
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