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The FRB-searching Pipeline of the Tianlai Cylinder Pathfinder Array

Research in Astronomy and Astrophysics 2024年第8期24卷 113-132页

作者： Zijie Yu furen deng Shijie Sun Chenhui Niu Jixia Li Fengquan Wu Wei-Yang Wang Yougang Wang Shifan Zuo Lin Shu Jie Hao Xiaohui Liu Reza Ansari Ue-Li Pen Albert Stebbins Peter Timbie Xuelei Chen National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Radio Astronomy and Technology Chinese Academy of ScienceBeijing 100101China Institute of Astrophysics Central China Normal UniversityWuhan 430079China Institute of Automation Chinese Academy of SciencesBeijing 100190China Guangdong Institute of Artificial Intelligence and Advanced Computing Guangzhou 510535China UniversitéParis-Saclay CNRS/IN2P3IJCLab91405 OrsayFrance Institute of Astronomy and Astrophysics Academia SinicaRoosevelt RoadTaipei 10617TaiwanChina Canadian Institute for Theoretical Astrophysics University of Toronto60 Saint George StreetTorontoON M5S 3H8Canada Department of Physics University of Wisconsin-MadisonMadisonWI 53706USA Fermi National Accelerator Laboratory P.O.Box 500Batavia IL 60510-5011USA Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Center of High Energy Physics Peking UniversityBeijing 100871China

This paper presents the design,calibration,and survey strategy of the Fast Radio Burst(FRB)digital backend and its real-time data processing pipeline employed in the Tianlai Cylinder Pathfinder *** array,consisting of three parallel cylindrical reflectors and equipped with 96 dual-polarization feeds,is a radio interferometer array designed for conducting drift scans of the northern celestial *** FRB digital backend enables the formation of 96 digital beams,effectively covering an area of approximately 40 square degrees with the 3 dB *** pipeline demonstrates the capability to conduct an automatic search of FRBs,detecting at quasi-realtime and classifying FRB candidates *** current FRB searching pipeline has an overall recall rate of88%.During the commissioning phase,we successfully detected signals emitted by four well-known pulsars:PSR B0329+54,B2021+51,B0823+26,and B2020+*** report the first discovery of an FRB by our array,designated as FRB *** also investigate the optimal arrangement for the digitally formed beams to achieve maximum detection rate by numerical simulation.

关键词： instrumentation interferometers-methods data analysis-(stars )pulsars general-telescopes

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A Fast Radio Burst Backend for the Tianlai Dish Pathfinder Array

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Research in Astronomy and Astrophysics 2022年第12期22卷 211-223页

作者： Zijie Yu furen deng Shijie Sun Chenhui Niu Jixia Li Fengquan Wu Wei-Yang Wang Yougang Wang Hui Feng Lin Shu Jie Hao Reza Ansari Albert Stebbins Xuelei Chen National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Department of Astronomy Peking UniversityBeijing 100871China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Institute of Automation Chinese Academy of SciencesBeijing 100190China Guangdong Institute of Artificial Intelligence and Advanced Computing Guangzhou 510535China UniversitéParis-Saclay CNRS/IN2P3IJCLabF-91405 OrsayFrance Fermi National Accelerator Laboratory P.O.Box 500BataviaIL 60510-5011United States of America Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Center of High Energy Physics Peking UniversityBeijing 100871China

The Tianlai Dish Pathfinder Array is a radio interferometer array consisting of 16 six-meter dish *** original digital backend integration time is at the seconds level,designed for H I intensity mapping experiment.A new digital backend with millisecond response is added to enable it to search for fast radio burst during its *** design and calibration of this backend,and the real time search pipeline for it are described in this *** is capable of forming 16 digital beams for each linear polarization,covering an area of 19.6 square *** search pipeline is capable of searching for,recording and classifying FRBs automatically in real *** commissioning,we succeeded in capturing the signal pulses from the pulsars PSR B0329+54 and B2021+51.

关键词： instrumentation:miscellaneous techniques:interferometric telescopes radio continuum:general (stars:)pulsars:general

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Cross-correlation Forecast of CSST Spectroscopic Galaxy and MeerKAT Neutral Hydrogen Intensity Mapping Surveys

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Research in Astronomy and Astrophysics 2023年第7期23卷 25-36页

作者： Yu-Er Jiang Yan Gong Meng Zhang Qi Xiong Xingchen Zhou furen deng Xuelei Chen Yin-Zhe Ma Bin Yue National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Sciences University of Chinese Academy of Science(UCAS)Beijing 100049China Science Center for China Space Station Telescope National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China NAOC-UKZN Computational Astrophysics Centre(NUCAC) University of KwaZulu-NatalDurban4000South Africa Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Center for High Energy Physics Peking UniversityBeijing 100871China School of Chemistry and Physics University of KwaZulu-NatalWestville CampusPrivate Bag X54001Durban 4000South Africa Department of Physics Stellenbosch UniversityMatieland 7602South Africa

Cross-correlating the data on neutral hydrogen(HⅠ)21 cm intensity mapping with galaxy surveys is an effective method to extract astrophysical and cosmological *** this work,we investigate the cross-correlation of MeerKAT single-dish mode HⅠintensity mapping and China Space Station Telescope(CSST)spectroscopic galaxy *** simulate a survey area of~300 deg~2 of MeerKAT and CSST surveys at z=0.5 using MultiDark N-body *** PC A algorithm is applied to remove the foregrounds of HⅠintensity mapping,and signal compensation is considered to solve the signal loss problem in HⅠ-galaxy cross power spectrum caused by the foreground removal *** find that from CSST galaxy auto and MeerKAT-CSST cross power spectra,the constraint accuracy of the parameter productΩ_(HⅠ)b_(HⅠ)r_(HⅠ,g)can reach~1%,which is about one order of magnitude higher than the current *** performing the full MeerKAT HⅠintensity mapping survey with5000 deg~2 survey area,the accuracy can be enhanced to<0.3%.This implies that the MeerKAT-CSST cross-correlation can be a powerful tool to probe the cosmic HⅠproperty and the evolution of galaxies and the Universe.

关键词： (cosmology:)large-scale structure of universe (cosmology:)cosmological parameters Cosmology

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宇宙黎明全天频谱实验研究进展

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电波科学学报 2024年第4期39卷 589-594页

作者：吴锋泉许嘉钦朱嘉聪张聪何凯孙士杰周嘉周民权徐沈哲周巍张皓然严琦森严瑞斌李吉夏邓辅仁陆宇杰索南本张骄张巨勇陈学雷中国科学院国家天文台北京100101 山西大学太原237016 杭州电子科技大学杭州310018

探索宇宙黑暗时代、黎明时代和再电离时代对于理解宇宙的演化具有重要意义,一直是天文学研究的一个重要方向。从2000年前后开始,人们尝试利用200 MHz以下的红移中性氢21 cm辐射对宇宙早期的演化进行探测,主要是两条路径,一种是利用大规... 详细信息

探索宇宙黑暗时代、黎明时代和再电离时代对于理解宇宙的演化具有重要意义,一直是天文学研究的一个重要方向。从2000年前后开始,人们尝试利用200 MHz以下的红移中性氢21 cm辐射对宇宙早期的演化进行探测,主要是两条路径,一种是利用大规模阵列对中性氢辐射进行三维成像或空间功率谱测量,另一种是通过单天线对21 cm中性氢全天平均频谱进行测量。后一种测量设备规模小,只需要单天线,但要求接收机具有高精度的校准能力。本文主要介绍近年来我们在国家天文台红柳峡观测站开展的全天频谱探测实验的进展情况,包括多种非频变天线设计、创新性的多通道交叉验证接收系统设计思想,以及初步的实验进展等,实验结果显示利用天线模拟器得到系统校准精度残差小于0.025 K,达到了自校准精度的国际水平。这些设备的研制和实验的开展将有力地推动我国未来的月球轨道或月基全天频谱探测项目。

关键词：宇宙黎明宇宙黑暗时代全天频谱实验精密频谱校准中性氢21 cm辐射

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Detecting HI Galaxies with Deep Neural Networks in the Presence of Radio Frequency Interference

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Research in Astronomy and Astrophysics 2023年第11期23卷 38-50页

作者： Ruxi Liang furen deng Zepei Yang Chunming Li Feiyu Zhao Botao Yang Shuanghao Shu Wenxiu Yang Shifan Zuo Yichao Li Yougang Wang Xuelei Chen National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 101408China Department of Physics Northeastern UniversityBostonMA 02115USA Biomedical Instrument Institute School of Biomedical EngineeringShanghai Jiao Tong UniversityShanghai 200030China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Key Laboratory of Cosmology and Astrophysics(Liaoning) College of SciencesNortheastern UniversityShenyang 110819China Key Laboratory of Radio Astronomy and Technology Chinese Academy of SciencesBeijing 100101China

In the neutral hydrogen(H I)galaxy survey,a significant challenge is to identify and extract the H I galaxy signal from the observational data contaminated by radio frequency interference(RFI).For a drift-scan survey,or more generally a survey of a spatially continuous region,in the time-ordered spectral data,the H I galaxies and RFI all appear as regions that extend an area in the time-frequency waterfall plot,so the extraction of the H I galaxies and RFI from such data can be regarded as an image segmentation problem,and machine-learning methods can be applied to solve such *** this study,we develop a method to effectively detect and extract signals of H I galaxies based on a Mask R-CNN network combined with the PointRend *** simulating FAST-observed galaxy signals and potential RFI impact,we created a realistic data set for the training and testing of our neural *** compared five different architectures and selected the best-performing *** architecture successfully performs instance segmentation of H I galaxy signals in the RFI-contaminated time-ordered data,achieving a precision of 98.64%and a recall of 93.59%.

关键词： methods:data analysis methods:observational techniques:image processing

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Tildrakizumab for moderate-to-severe plaque psoriasis in Chinese patients:A 12-week randomized placebo-controlled phase III trial with long-term extension

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Chinese Medical Journal 2024年第10期137卷 1190-1198页

作者： Chen Yu Songmei Geng Bin Yang Yunhua deng Fuqiu Li Xiaojing Kang Mingye Bi furen Zhang Yi Zhao Weili Pan Zhongwei Tian Jinhua Xu Zhenghua Zhang Nan Yu Xinsuo Duan Shuping Guo Qing Sun Weiquan Li Juan Tao Zhijun Liu Yuanyuan Yin Gang Wang Department of Dermatology Xijing HospitalThe Fourth Military Medical UniversityXi’anShaanxi 710032China Department of Dermatology The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi 710004China Department of Dermatology Dermatology Hospital of Southern Medical UniversityGuangzhouGuangdong 510091China Department of Dermatology Tongji HospitalHuazhong University of Science and TechnologyWuhanHubei 430030China Department of Dermatology The Second Hospital of Jilin UniversityChangchunJilin 130041China Department of Dermatology People’s Hospital of Xinjiang Uygur Autonomous RegionUrumqiXinjiang 830001China Department of Dermatology Wuxi People’s Hospital of Wuxi CityWuxiJiangsu 214023China Department of Dermatology Shandong Provincial Hospital for Skin Diseases&Shandong Provincial Institute of Dermatology and VenereologyShandong First Medical University&Shandong Academy of Medical SciencesJinanShandong 250022China Department of Dermatology Beijing Tsinghua Changgung HospitalBeijing 102218China Department of Dermatology Zhejiang Provincial People’s HospitalHangzhouZhejiang 310014China Department of Dermatology The First Affiliated Hospital of Xinxiang Medical CollegeXinxiangHenan 453100China Department of Dermatology Huashan Hospital Affiliated to Fudan UniversityShanghai 200040China Department of Dermatology General Hospital of Ningxia Medical UniversityYinchuanNingxia 750000China Department of Dermatology Affiliated Hospital of Chengde Medical UniversityChengdeHebei 067000China Department of Dermatology The First Hospital of Shanxi Medical UniversityTaiyuanShanxi 030001China Department of Dermatology Qilu Hospital of Shandong UniversityJinanShandong 250012China Department of Dermatology Yuebei People’s HospitalShaoguanGuangdong 512026China Department of Dermatology Union Hospital Tongji Medical Collage Huazhong University of Science and TechnologyWuhanHubei 430022China Department of Dermatology and Venereal Diseases The First Affiliated Hospit

Background:There is a need for effective and safe therapies for psoriasis that provide sustained *** aim of this study was to assess the efficacy and safety of tildrakizumab,an anti-interleukin-23p19 monoclonal antibody,for treating moderate-to-severe plaque psoriasis in Chinese ***:In this multi-center,double-blind,phase III trial,patients with moderate-to-severe plaque psoriasis were enrolled and randomly assigned(1:1)to receive subcutaneous tildrakizumab 100 mg or placebo at weeks 0 and *** initially assigned to placebo were switched to receive tildrakizumab at weeks 12,16,and every 12 weeks *** in the tildrakizumab group continued with tildrakizumab at week 16,and every 12 weeks until week *** primary endpoint was the Psoriasis Area and Severity Index(PASI 75)response rate at week ***:At week 12,tildrakizumab demonstrated significantly higher PASI 75 response rates(66.4%[73/110]vs.12.7%[14/110];difference,51.4%[95%confidence interval(CI),40.72,62.13];P<0.001)and Physician’s Global Assessment(60.9%[67/110]vs.10.0%[11/110];difference,49.1%[95%CI,38.64,59.62];P<0.001)compared to *** 75 response continued to improve over time in both tildrakizumab and placebo-switching to tildrakizumab groups,reaching maximal efficacy after 28 weeks(86.8%[92/106]vs.82.4%[89/108])and maintained up to 52 weeks(91.3%[95/104]vs.87.4%[90/103]).Most treatment-emergent adverse events were mild and not related to ***:Tildrakizumab demonstrated durable efficacy through week 52 and was well tolerated in Chinese patients with moderate-to-severe plaque *** registration:***,NCT05108766.

关键词： Tildrakizumab Interleukin 23 Plaque psoriasis Chinese Randomized controlled trial

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Advances in Transition-Metal-Catalyzed Hydrogermylation of Alkenes and Alkynes

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Chinese Journal of Chemistry 2023年第22期41卷 3063-3081页

作者： Zungui Zhao furen Zhang Dongyang Wang Liang deng Division of Molecular Catalysis and Synthesis Henan Institute of Advanced TechnologyZhengzhou UniversityZhengzhouHenan 450001China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai200032China Schoolof Chemistry and Chemical Engineering ShaoxingUniversityShaoxingZhejiang312000China

Hydrogermylation of alkenes and alkynes provides a straightforward synthetic route to organogermanium compounds that have been found applications in organic synthesis,medicinal chemistry,and material *** paper reviews the advances in transition-metal-catalyzed hydrogermylation of unsaturated carbon-carbon bonds,including alkenes,alkynes,dienes,and allenes,with the objective of providing readers with the status of the ***,problems,and perspectives in this field are discussed.

关键词： Hydrogermylation Alkene Alkyne Diene Allene Transition-metal Organogermanium

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西安地区首见四例黄色釀母霉菌病报告

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中华皮肤科杂志 1959年第02期07卷 118-123页

作者： LI Boxun DU Suizhi WU Tingbi deng Yunshan LIU furen LIU Weitong 西安医学院皮肤性病教研组西安医学院皮肤性病教研组西安医学院皮肤性病教研组西安医学院皮肤性病教研组西安医学院皮肤性病教研组西安医学院皮肤性病教研组

黄色釀母霉菌病为一种深在性皮肤真菌——黄色釀母霉菌(Chromoblastamycetes)所致之慢性皮肤病.因患者多属农民,且经过缓慢,性质顽固,更因其喜侵下腿,时久可有丧失劳动之虞.

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国外会计学课程建设研究综述及启示

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当代教育理论与实践 2021年第3期13卷 56-62页

作者：邓明君李露婧黄辅仁罗文兵湖南科技大学产业发展大数据与智能决策湖南省工程研究中心湖南湘潭411201 湖南科技大学商学院湖南湘潭411201

会计学课程建设是高校会计学专业教学基本建设的重要内容之一,科学的课程体系有助于提高高校会计学专业人才培养质量。经过一系列改革,国外会计学课程建设逐渐完善,国外会计学课程建设研究成果也在不断增加。基于近些年国外会计专业课... 详细信息

会计学课程建设是高校会计学专业教学基本建设的重要内容之一,科学的课程体系有助于提高高校会计学专业人才培养质量。经过一系列改革,国外会计学课程建设逐渐完善,国外会计学课程建设研究成果也在不断增加。基于近些年国外会计专业课程建设研究相关成果,分析课程规划与设计研究、课程教学方法与技术研究和课堂建设效果评估研究的总体特征及其对中国会计教育改革的启示。

关键词：会计学课程课程建设会计教育

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