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In-flight Energy Calibration of the GECAM Gamma-ray Detectors

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Research in Astronomy and Astrophysics 2024年第10期24卷 48-57页

作者： Rui qiao Dong-Ya Guo Wen-Xi Peng Yan-qiu Zhang Shuo Xiao Shao-Lin Xiong Chao Zheng Chao-Yang Li Jia-Cong Liu Wang-Chen Xue Jian-Jian He Zheng-Hua An Da-Li Zhang Xin-qiao Li Li-Ming Song Shi-Jie Zheng Ke Gong Ya-qing Liu Xin-ying Song Xiao-Yun Zhao Xiang-Yang Wen Yan-bing Xu Xiang Ma Xiao-Bo Li Ping Wang Yue Huang Ce Cai qi-bin yi yi Zhao Chen-Wei Wang Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China China West Normal University Nanchong 637002China Xiangtan University Xiangtan 411105China Beijing Normal University Beijing 100875China

The Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)mission is designed to monitor the Gamma-Ray Bursts(GRBs)associated with gravitational waves and other high-energy transient *** mission consists of two microsatellites which are planned to operate at the opposite sides of the *** GECAM satellite could detect and localize GRBs in about 8 keV-5 MeV with its 25 Gamma-Ray Detectors(GRDs).In this work,we report the in-flight energy calibration of GRDs using the characteristic gamma-ray lines in the background spectra,and show their performance evolution during the commissioning ***,a preliminary cross-calibration of energy response with Fermi GBM data is also presented,validating the energy response of GRDs.

关键词： (stars:)gamma-ray burst:general instrumentation:detectors methods:data analysis

Paired quasi-periodic pulsations of hard X-ray emission in a solar flare

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Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 195-206页

作者： Hai-Sheng Zhao Dong Li Shao-Lin Xiong Yan-qiu Zhang Yang Su Wei Chen yi Zhao Xiao-Bo Li Jia-Cong Liu Wen-Xi Peng Rui qiao Xin-qiao Li Xiang-Yang Wen Li-Ming Song Shi-Jie Zheng Xin-ying Song Xiao-Yun Zhao Yue Huang Shuang-Nan Zhang Shuo Xiao Ce Cai Zheng-Hua An Can Chen Gang Chen Wei Chen Yan-qi Du Min Gao Ke Gong Dong-Ya Guo Zhi-Wei Guo Jian-Jian He bin Li Chao Li Chao-Yang Li Gang Li Jian-Hui Li Lu Li qing-Xin Li Yan-Guo Li Jing Liang Xiao-Hua Liang Jin-Yuan Liao Xiao-Jing Liu Ya-qing Liu qi Luo Xiang Ma bin Meng Ge Ou Dong-Li Shi Jing-Yan Shi Gong-Xing Sun Xi-Lei Sun You-Li Tuo Chen-Wei Wang Hui Wang Jin Wang Jin-Zhou Wang Ping Wang Wen-Shuai Wang Hong Wu Sheng-Lun Xie Yan-bing Xu Yu-Peng Xu Wang-Chen Xue Sheng Yang Min Yao Jian-ying Ye qi-bin yi Chao-Yue Zhang Da-Li Zhang Fan Zhang Fei Zhang Hong-Mei Zhang Kai Zhang Peng Zhang Xiao-Lu Zhang Zhen Zhang Guo-ying Zhao Shi-yi Zhao Chao Zheng Xing Zhou Yue Zhu Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China University of Chinese Academy of Sciences Beijing 100049China Department of Astronomy Beijing Normal UniversityBeijing 100875China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China Physics and Space Science College China West Normal UniversityNanchong 637002China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Institute of Astrophysics Central China Normal UniversityWuhan 430079China School of Physics Changchun University of Science and TechnologyChangchun 130022China College of Physics and Engineering Qufu Normal UniversityQufu 273165China College of Physics Sciences&Technology Hebei UniversityBaoding 071002China

We investigate high time resolution data obtained by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)during the flare event on 2022 April 21 at 01:52 *** subpeaks with durations of 4-6 s have been detected in the hard X-ray precursor phase,and the key feature is that they appear in pairs and seem like double-peak *** subpeaks are rarely observed in hard X-ray band and confirmed by the microwave obtained by Nobeyama Radio Polarimeters(NoRP)and Radio Solar Telescope Network(RSTN).While an exponential function can describe the continuum component of the time profile from the precursor to part of the impulsive *** periods of quasi-periodic pulsations(QPPs)are detected to be about 7.3 and 12.8 s for the precursor and impulsive phase,respectively,with at least 95%confidence *** paired QPPs are assumed to be double-peak QPPs and then the scenario of current loop coalescence model is found to be in good agreement with our *** precursor phase can be interpreted as the oscillating coalescence of two islands,while the impulsive phase can be interpreted as more islands to coalesce one by one to form larger islands.

关键词： solar flare QPPs loop coalescence circular-ribbon flare

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公路挖方路基边坡稳定性分析及动态设计研究

工程建设与设计 2018年第23期 76-78页

作者：祁艺彬云南省交通规划设计研究院昆明650041

以某山区高速公路工程为例,运用有限元数值模拟对挖方路基边坡稳定性进行计算分析,设计合理的边坡防护措施,并且在施工后,根据其变化及数值计算,设计动态治理方案,保证了边坡的稳定性,为相关边坡稳定性的治理提供借鉴。

关键词：边坡稳定性动态设计监测排水工程

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氯化钙水型油藏内源微生物激活剂研究

科学技术与工程 2015年第4期35卷 78-83页

作者：崔庆锋齐义彬伊丽娜张瑜俞理中国科学院渗流流体力学研究所中国石油勘探开发研究院廊坊分院廊坊065007

应用最大可能数法（MPN）和高通量测序分析新疆油田氯化钙水型油藏产出液中微生物群落结构。应用离子色谱分析了油藏地层水的离子组成,确定了激活内源微生物的基础及目标。确立以原油乳化效果、激活后烃氧化菌浓度为筛选激活剂的主要指... 详细信息

应用最大可能数法（MPN）和高通量测序分析新疆油田氯化钙水型油藏产出液中微生物群落结构。应用离子色谱分析了油藏地层水的离子组成,确定了激活内源微生物的基础及目标。确立以原油乳化效果、激活后烃氧化菌浓度为筛选激活剂的主要指标,进行了内源微生物激活剂的筛选。在单因素实验筛选最佳碳源、氮源和磷源后,采用均匀设计优化了激活剂组分含量,并进行了激活效果评价实验。实验结果表明：优化的激活剂激活地层水中内源微生物后,原油乳化效果明显,提高功能菌群烃氧化菌等菌浓5-6数量级,而硫酸盐还原菌被明显抑制;同时微生物群落结构发生明显改变,细菌生物多样性有所降低,实现了对Pseudomonas、Bacillus、Stenotrophomonas、Pusillimonas和Acinetobacter等常见采油功能菌的高效激活。

关键词：内源微生物激活优化乳化作用模拟提高原油采收率氯化钙水型油藏

Maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

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Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-Yan Huang yi-De Zhang Jie Chen Hai-Di Fan Wan Wang bin Wang Ju-Yun Ma Peng-Peng Li Hai-Wei Pu Xin-yian Guo Jian-Gang Shen Su-Hua qi School of Medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory Medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese Medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μM)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μM)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin

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稠油解烃菌与乳化剂产生菌复配降解降黏机理

科学技术与工程 2017年第8期17卷 1-5页

作者：齐义彬郑承纲吕成远伦增珉中国石油化工股份有限公司石油勘探开发研究院北京100083

油杆菌W3分离自江苏油田韦5井,能够以稠油为唯一碳源生长,并降解稠油。54℃好氧振荡培养7 d之后,稠油能够完全乳化分散到培养基中,降黏率达到了76.88%,降解速率达到了99.7 mg/d,原油族组分分析发现,稠油中饱和烃,芳香烃和胶质的含量分... 详细信息

油杆菌W3分离自江苏油田韦5井,能够以稠油为唯一碳源生长,并降解稠油。54℃好氧振荡培养7 d之后,稠油能够完全乳化分散到培养基中,降黏率达到了76.88%,降解速率达到了99.7 mg/d,原油族组分分析发现,稠油中饱和烃,芳香烃和胶质的含量分别降低了4.14%,6.77%和4.33%。该菌与另一株筛选得到的、能够合成乳化剂的地芽孢杆菌W12复配(V_(W3)∶V_(W12)=1∶1)后作用稠油,既能够增强稠油降解效果(降解速率加快,原油族组分含量进一步降低),又能够改善稠油的乳化分散状态(乳化稳定性增强,平均乳化粒径减小56.7%),此时的稠油的乳化黏度为20.59 MPa·s,仅为初始黏度的3.9%。这两株菌的复配增强了稠油降解和乳化的双重降黏效果,大幅提高了稠油的流动性。

关键词：稠油微生物乳化降解降黏

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不同种类微生物对碳酸盐岩溶蚀普遍性

科学技术与工程 2021年第3期21卷 986-990页

作者：齐义彬丁茜朱东亚何治亮中国石油化工股份有限公司石油勘探开发研究院北京100083 中国石油化工股份有限公司北京100728

表生溶蚀作用是碳酸盐岩储层形成的重要因素。从岩石表面中筛选3种典型微生物,芽孢杆菌Q1、链霉菌Q2和曲霉菌Q3。通过比较不同种类微生物的产酸、溶蚀速率以及在多孔介质中溶蚀的动态模拟实验,研究了微生物对碳酸盐岩的表生溶蚀作用的... 详细信息

表生溶蚀作用是碳酸盐岩储层形成的重要因素。从岩石表面中筛选3种典型微生物,芽孢杆菌Q1、链霉菌Q2和曲霉菌Q3。通过比较不同种类微生物的产酸、溶蚀速率以及在多孔介质中溶蚀的动态模拟实验,研究了微生物对碳酸盐岩的表生溶蚀作用的普遍性。结果表明,各实验体系中pH、钙离子浓度均发生了有规律的变化,其中曲霉菌Q3的产酸能力与溶蚀效果最显著,5 d内使培养体系的pH降低了2.69,Q3-方解岩和Q3-白云岩培养体系中Ca~(2+)浓度分别达到了327 mg/L和258 mg/L。同时,微生物在多孔介质中对白云岩的溶蚀实验表明,曲霉菌Q3的岩心溶蚀能力也强于芽孢杆菌Q1和链霉菌Q2。研究表明,微生物不但能够对岩石表面产生溶蚀作用,也能够在多孔介质中也对碳酸盐岩等产生溶蚀作用。微生物对碳酸盐岩溶蚀作用具有普遍性,微生物岩溶很有可能发生在较广泛的表层岩石范围内,促进碳酸盐岩储层的形成。

关键词：表生岩溶碳酸盐岩微生物溶蚀速率

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稳定的新型雷贝拉唑钠肠溶微丸

中国抗生素杂志 2016年第12期41卷 935-941页

作者：顾鑫邓盛齐张亦斌李楠陶静郑林成都抗生素创制工程技术研究中心四川抗菌素工业研究所成都大学成都610052

目的制备在肠道内更稳定的可释放两次的雷贝拉唑钠。方法用挤出滚圆法制备雷贝拉唑钠载药微丸丸芯并优化其处方及工艺。载药丸芯包裹隔离层后分别包裹两种肠溶层,制成雷贝拉唑钠肠溶微丸,混合后对释放度和稳定性进行测定。结果载药丸芯... 详细信息

目的制备在肠道内更稳定的可释放两次的雷贝拉唑钠。方法用挤出滚圆法制备雷贝拉唑钠载药微丸丸芯并优化其处方及工艺。载药丸芯包裹隔离层后分别包裹两种肠溶层,制成雷贝拉唑钠肠溶微丸,混合后对释放度和稳定性进行测定。结果载药丸芯处方为10%无水碳酸钠,10%甘露醇,20%雷贝拉唑钠,20%低取代羟丙基纤维素,40%微晶纤维素,以5%羟丙基甲基纤维素的水-乙醇(65:35,W/W)溶液为黏合剂。以欧巴代胃溶型包衣液为隔离层,增重8%,欧巴代肠溶型94系列和尤特奇S100包衣材料为肠溶层,增重15%和20%,得到的微丸含量为97%。混合微丸在p H6.8的磷酸盐缓冲液中60min释放度为40%,120min释放度为70%,在p H8.0的三羟甲基氨基甲烷缓冲液中60min释放度大于80%,且较为稳定。结论成功制备了雷贝拉唑钠肠溶微丸,可在更稳定的p H环境下释放,并具有潜在的两次释放的特征。

关键词：雷贝拉唑钠载药丸芯肠溶微丸两次释放

The GECAM ground search system for gamma-ray transients

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Science China(Physics,Mechanics & Astronomy) 2024年

作者： Ce Cai Yan-qiu Zhang Shao-Lin Xiong Ping Wang Jian-Hui Li Xiao-Bo Li Cheng-Kui Li Yue Huang Shi-Jie Zheng Li-Ming Song Shuo Xiao qi-bin yi yi Zhao Sheng-Lun Xie Rui qiao Yan-qi Du Zhi-Wei Guo Wang-Chen Xue Chao Zheng Jia-Cong Liu Chen-Wei Wang Wen-Jun Tan Yue Wang Jin-Peng Zhang Chao-Yang Li Guo-ying Zhao Xiao-Yun Zhao Xiao-Lu Zhang Zhen Zhang Wen-Xi Peng Xiang Ma Jing-Yan Shi Dong-Ya Guo Jin Wang Xin-qiao Li Xiang-Yang Wen Zheng-Hua An Fan Zhang College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal University Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences University of Chinese Academy of Sciences School of Physics and Electronic Science Guizhou Normal University Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal University School of Physics and Optoelectronics Xiangtan University School of Computer and Information Dezhou University Institute of Astrophysics Central China Normal University

In the era of time-domain,multi-messenger astronomy,the detection of transient events on the high-energy electromagnetic sky has become more important than *** gravitational wave high-energy electromagnetic counterpart all-sky monitor （GECAM）is a dedicated mission to monitor gamma-ray transients,launched in December,2020.A real-time on-board trigger and location software,using the traditional signal-to-noise ratio （SNR） method for blind search,is constrained to relatively bright signals due to the limitations in on-board computing resources and the need for real-time *** this work,we developed a ground-based pipeline for GECAM to search for various transients,especially for weak bursts missed by on-board *** pipeline includes both automatic and manual mode,offering options for blind search and targeted *** targeted search is specifically designed to search for interesting weak bursts,such as gravitational wave-associated gamma-ray bursts （GRBs）.From the ground search of the data in the first year,GECAM has been triggered by 54 GRBs and other transients,including soft gamma-ray repeaters,X-ray binaries,solar flares,terrestrial gamma-ray *** report the properties of each type of triggers,such as trigger time and light *** this search pipeline and assuming a soft Band spectrum,the GRB detection sensitivity of GECAM is increased to about 1.1×10-8erg cm-2s-1（10-1000 keV,burst duration of 20 s）.These results demonstrate that the GECAM ground search system （both blind search and targeted search） is a versatile pipeline to recover true astrophysical signals which were too weak to be found in the on-board search.

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