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Progress in shock wave diagnostic technology based on velocity interferometers for laser inertial confinement fusion 认领 引用
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作者 Feng Wang Yulong Li +5 位作者 Zanyang Guan Xiaoshi Peng Xiangming Liu Dong Yang Jiamin Yang Zongqing Zhao 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第2期1-13,共13页
Laser-driven inertial confinement fusion(ICF)is an important experimental platform for high-energy-density physics research under extreme conditions.In ICF research,high-quality shock waves are key to fusion energy re... Laser-driven inertial confinement fusion(ICF)is an important experimental platform for high-energy-density physics research under extreme conditions.In ICF research,high-quality shock waves are key to fusion energy release.The velocity interferometer system for any reflector(VISAR)is the most important diagnostic technique for measuring quantities such as shock wave and particle velocities with high precision and high spatiotemporal resolution.This paper provides a detailed introduction to the various configurations of VISAR on 10 and 100 kJ-level laser facilities in China,including Line VISAR,Dual-Axis VISAR,Wide-Angle VISAR,and Compressed Ultrafast Photography-VISAR.Recent advances and applications of VISAR diagnostics at these laser facilities are presented,and the future trend of development of high-spatiotemporal-resolution velocity diagnostic technology is described. 展开更多
关键词 laser inertial confinement fusion high energy density physics velocity interferometer system particle velocities velocity interferometer diagnostic technique shock wave diagnostic technology shock waves
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Space-Borne Interferometers to Detect Thousands of Memory Signals Emitted by Stellar-Mass Binary Black Holes 认领 引用
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作者 Shaoqi Hou Zhi-Chao Zhao +1 位作者 Zhoujian Cao Zong-Hong Zhu 《Chinese Physics Letters》 SCIE EI CAS CSCD 2025年第10期323-330,共8页
The gravitational memory effect manifests gravitational nonlinearity,degenerate vacua,and asymptotic symmetries;its detection is considered challenging.We propose using a space-borne interferometer to detect memory si... The gravitational memory effect manifests gravitational nonlinearity,degenerate vacua,and asymptotic symmetries;its detection is considered challenging.We propose using a space-borne interferometer to detect memory signals from stellar-mass binary black holes(BBHs),typically targeted by ground-based detectors.We use DECIGO detector as an example.Over 5 years,DECIGO is estimated to detect approximately 2,036 memory signals(SNRs>3)from stellar-mass BBHs.Simulations used frequency-domain memory waveforms for direct SNR estimation.Predictions utilized a GWTC-3 constrained BBH population model(Power law+Peak mass,DEFAULT spin,Madau-Dickinson merger rate).The analysis used conservative lower merger rate limits and considered orbital eccentricity.The high detection rate stems from strong memory signals within DECIGO’s bandwidth and the abundance of stellar-mass BBHs.This substantial and conservative detection count enables statistical use of the memory effect for fundamental physics and astrophysics.DECIGO exemplifies that space interferometers may better detect memory signals from smaller mass binaries than their typical targets.Detectors in lower frequency bands are expected to find strong memory signals from∼104M⊙binaries. 展开更多
关键词 space borne interferometer detect memory signals gravitational memory effect decigo detector binary black holes bbhs typically stellar mass binary black holes signal noise ratio
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Factors that influence long term instrumentation stability in patients with unstable thoracolumbar injuries 认领 引用 被引量：1
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作者 Andrey E Bokov Svetlana Y Kalinina +3 位作者 Daria A Kulagina Kseniia S Lopyrina Vladimir V Klinshov Anatolii A Bulkin 《World Journal of Orthopedics》 2025年第8期93-102,共10页
BACKGROUND Pedicle screw fixation is frequently used to treat unstable thoracolumbar injuries;however,the rate of instrumentation failure remains considerable.The primary contributing factor leading to instrumentation... BACKGROUND Pedicle screw fixation is frequently used to treat unstable thoracolumbar injuries;however,the rate of instrumentation failure remains considerable.The primary contributing factor leading to instrumentation failure is poor bone quality.On the other hand,some evidence suggests that surgical tactics can influence long-term instrumentation stability.AIM To assess factors that influence the stability of spinal instrumentation in patients with thoracolumbar injuries.METHODS This study is a non-randomized single center ambispective evaluation of 204 consecutive patients(117 men;87 women)with unstable thoracolumbar injuries.All patients underwent either stand-alone or combined with anterior column reconstruction instrumentation.In cases with spinal cord and nerve root injuries,either posterior or anterior decompression were performed.Patients with pedicle screw loosening were identified via computed tomography imaging.Out of those,cases with clinically significant instrumentation failure were registered.RESULTS The rate of pedicle screw loosening detected by computed tomography was inversely correlated with bone radiodensity figures and an increased association with the number of instrumented levels,residual kyphotic deformity,laminectomy,and lumbosacral fixation.Intermediate screws and anterior reconstruction were associated with a clinically relevant decreased risk of pedicle screw loosening development.Either complete or partial posterior fusion within instrumented levels was capable of decreasing instrumentation failure risk,while extensive decompression with laminectomy and at least one-level total facetectomy were associated with an increased risk of instrumentation failure.Anterior decompression does not have a negative impact on instrumentation stability.CONCLUSION Intermediate screws,anterior reconstruction and posterior tension band preservation are associated with decreased rates of instrumentation instability development.Posterior fusion is beneficial in terms of instrumentation failure prevention. 展开更多
关键词 Instrumentation stability Unstable thoracolumbar injuries Pedicle screw loosening Anterior reconstruction Posterior decompression
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Mock Observations for the CSST Mission:CPI-C——Instrument Simulation 认领 引用 被引量：1
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作者 Gang Zhao Yiming Zhu +7 位作者 Jiangpei Dou Xi Zhang Yili Chen Zhonghua Lv Bingli Niu Zhaojun Yan Bo Ma Ran Li 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2026年第2期136-147,共12页
To support the development of the data processing pipeline and the scientific performance assessment for the Cool Planet Imaging Coronagraph(CPI-C)on the Chinese Space Station Survey Telescope,we have developed the en... To support the development of the data processing pipeline and the scientific performance assessment for the Cool Planet Imaging Coronagraph(CPI-C)on the Chinese Space Station Survey Telescope,we have developed the end-to-end instrument simulation program,CPISM.This paper details the core modules of CPISM that simulate the CPI-C instrument,focusing on the simulation of the high-contrast imaging optical system and the visible-band science camera.We modeled key optical components,such as the transmission apodizing filter,the wavefront corrector,and the focal plane mask using the HCIPy package.A 10-8contrast dark hole region,consistent with design specifications,was simulated using the Electric Field Conjugation optimization method,and broadband observation effects were considered.For the science camera,which is an electron multiplying charge-coupled device,we established a detailed model encompassing photon collection,charge transfer,electron multiplication(EM),and readout processes,based on test data.This model simulates complex instrumental features including dark current,charge transfer efficiency,clock-induced charge,multiplication noise factor,and various readout effects like striping and drift.We also proposed and validated an improved statistical model for the EM process to enhance simulation efficiency.CPISM can generate simulated images containing rich instrumental details,closely similar to the expected real observational data,thus laying the foundation for the development and verification of CPI-C data processing algorithms and preparations for future scientific research. 展开更多
关键词 instrumentation high angular resolution-planets and satellites detection-methods numerical
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Research and Implementation of Wideband Radio Signal Channelization Based on RFSoC 认领 引用
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作者 Jian Li Maozheng Chen +8 位作者 Xuefeng Duan Yanling Liu Xin Pei Hailong Zhang Yuning An Mingshuai Li Liang Cao Kai Wang Hao Yan 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2026年第2期285-295,共11页
This study addresses the need for real-time sampling and transmission of wideband signals in radio astronomy,developing a comprehensive technical workflow from hardware implementation to firmware compilation.The syste... This study addresses the need for real-time sampling and transmission of wideband signals in radio astronomy,developing a comprehensive technical workflow from hardware implementation to firmware compilation.The system,based on the Xilinx ZCU111 Radio Frequency System on Chip(RFSoC)development board,incorporates hardware modifications and custom development using the CASPER open-source toolflow.We adopt a channelization method based on the Polyphase Filter Bank algorithm,provide the corresponding theoretical derivations,and implement the scheme on the CASPER open-source toolflow.The developed firmware enables channelization(16 channels,128 MHz bandwidth)of ultra-wideband signals at a 4096 MHz sampling rate on RFSoC hardware.Deployed at the Nanshan 26 m radio telescope for L-band(964-1732 MHz)observations,the system successfully produced high signal-to-noise ratio pulsar profiles after processing with DSPSR software,validating the reliability of the channelization algorithm.These results confirm the feasibility of RFSoC-based architectures for wideband signal channelization,offering a practical pathway for future astronomical backends. 展开更多
关键词 instrumentation detectors-instrumentation miscellaneous-methods observational
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In-flight Trigger Classification Algorithm for GECAM-C 认领 引用
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作者 Jia-Ciong Liu Shao-Lin Xiong +26 位作者 Yue Huang Xiao-Yun Zhao Chen-Wei Wang Xiang-Yang Wen Chao Zheng Wang-Chen Xue Yan-Qiu Zhang Wen-Jun Tan Yue Wang Jin-Peng Zhang Hao-Xuan Guo Yang-Zhao Ren Sheng-Lun Xie Peng Zhang Zheng-Hua An Ke Gong Xiao-Bo Li Xin-Qiao Li Ya-Qing Liu Xiao-Jing Liu Xiang Ma Rui Qiao Jin Wang Ping Wang Sheng Yang Da-Li Zhang Shi-Jie Zheng 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2026年第4期221-227,共7页
As a member of the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)constellation,GECAM-C is an all-sky gamma-ray monitor with in-flight trigger capability aboard the SATech-01 experime... As a member of the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)constellation,GECAM-C is an all-sky gamma-ray monitor with in-flight trigger capability aboard the SATech-01 experimental satellite.Operating in a Sun-Synchronous Orbit,GECAM-C generates many in-flight triggers,some of which correspond to important astrophysical bursts,such as gamma-ray bursts and soft gamma-ray repeaters,which may require follow-up observations.However,there are also a substantial number of non-astrophysical triggers,such as particle events.Therefore,a prompt and accurate classification of in-flight triggers is essential for scientific research.In this work,we propose an automatic trigger classification algorithm for GECAM-C in-flight triggers with Bayesian inference.Applying this method to GECAM-C triggers from 2022 December to 2023 December,we demonstrate that it can successfully categorize all trigger types with an accuracy of about 95%,thereby providing effective support for rapid follow-up observations. 展开更多
关键词 instrumentation detectors-methods statistical-methods data analysis
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Spatial and temporal distribution characteristics of low-visibility phenomena in Xinjiang based on instrument measurements 认领 引用
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作者 WANG Xiuqin NING Jinge +3 位作者 AN Dongliang LU Xinyu WANG Minzhong WU Chunxia 《Journal of Mountain Science》 SCIE CSCD 2026年第3期1006-1024,共19页
Low-visibility phenomena strongly impact the environment,as well as transportation,aviation and other fields that are closely related to people's livelihoods;thus,they represent important ecological issues of soci... Low-visibility phenomena strongly impact the environment,as well as transportation,aviation and other fields that are closely related to people's livelihoods;thus,they represent important ecological issues of social concern.Based on observation data concerning low-visibility phenomena derived from 105 national meteorological stations in Xinjiang,China over the past 20 years,we systematically analyzed the differences between manual and instrument observations for six types of low-visibility phenomena,with a focus on exploring their spatiotemporal distribution characteristics using instrument data.The results revealed that low-visibility phenomena were dominated by fog-and haze-related events(mist,fog,and haze)in northern Xinjiang and dust-related events(dust storms,blowing sand,and floating dust)in southern Xinjiang,with transitional characteristics observed in eastern Xinjiang.Compared with manual observations,the instrument measurements significantly improved the fine-scale low-visibility phenomenon identification process.On the basis of the instrument observation data,spatial-dimension analysis results indicated that low-visibility phenomena in Xinjiang were significantly influenced by terrain factors.Constrained by the Tianshan Mountains,haze-like phenomena formed a core agglomeration area in northern Xinjiang,whereas dust-and sand-related phenomena radiated outward,with the Taklimakan Desert at the center.Moreover,the gripping effect of the terrain promoted dust transmission along low-altitude channels.Temporally,fog-and haze-related phenomena occurred mainly during autumn and winter,and the proportion of these events decreased from 76.7%to 55.1%.The fog-and haze-related phenomena demonstrated a U-shaped rebound trend,while the proportion of mist phenomena decreased by 34.2%.Dust storms occurred during spring,accounting for 23.3%to 44.9%of all storms.Instrument measurement technology has the advantages of high spatial and temporal resolutions and multiparameter coordination but provides a limited dust-haze mixed-pollution identification capacity.This study provides crucial reference data for enhancing the understanding of low-visibility events in Xinjiang and the potential responses while improving the accuracy of pollution source tracking and meteorological process diagnosis tasks. 展开更多
关键词 Instrument measurement Low visibility Distribution Xinjiang
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高校科研仪器国产化研究:现状、困境与对策 认领 引用 被引量：3
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作者 王钦丽 王月琴 +3 位作者 李曦 王建英 曾艳 杨健安 《实验室研究与探索》 CAS 北大核心 2026年第1期228-232,240,共5页
针对高校科研仪器国产化进程缓慢的困境,该文系统分析了其在技术、制度与主体层面的多重障碍。基于制度理论框架,结合文献梳理与实证调研数据,深入剖析了当前国产科研仪器在性能服务、政策执行、用户认知及评价体系等方面面临的具体问... 针对高校科研仪器国产化进程缓慢的困境,该文系统分析了其在技术、制度与主体层面的多重障碍。基于制度理论框架,结合文献梳理与实证调研数据,深入剖析了当前国产科研仪器在性能服务、政策执行、用户认知及评价体系等方面面临的具体问题。研究发现:高校高端科研仪器进口依赖格局显著;国产化进程因核心技术滞后、采购论证流于形式、用户信任不足以及权威评价体系缺失等多重因素受到制约。在此基础上,构建了以“政策引导-验证评价-用户培育”为核心的对策建议,为政府、高校与企业提供了可操作的行动框架。 展开更多
关键词 科研仪器 国产化 高校采购 政策引导
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Mock Observations for the CSST Mission:Integral Field Spectrograph-Instrument Simulation 认领 引用
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作者 Zhao-Jun Yan Jun Yin +26 位作者 Lei Hao Shi-Yin Shen Wei Chen Shuai Feng Yi-Fei Xiong Chun Xu Xin-Rong Wen Lin Lin Chao Liu Lin Long Zhen-Lei Chen Mao-Chun Wu Xiao-Bo Li Zhang Ban Xun Yang Yu-Xi Jiang Guo-Liang Li Ke-Xin Li Jian-Jun Chen Nan Li Cheng-Liang Wei Lei Wang Bai-Chuan Ren Jun Wei Jing Tang Yang Yang Ran Li 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2026年第2期108-123,共16页
The Chinese Space Station Survey Telescope(CSST)is a next-generation Stage-IV facility renowned for its wide field of view,high image quality,and multi-band observational capabilities.Among the five instruments onboar... The Chinese Space Station Survey Telescope(CSST)is a next-generation Stage-IV facility renowned for its wide field of view,high image quality,and multi-band observational capabilities.Among the five instruments onboard the CSST,the Integral Field Spectrograph(IFS)offers the unique ability to simultaneously capture spatial and spectral information across a field of view of no less than 6″×6″.Key advantages of the IFS include a high spatial resolution of 0.2 and a broad spectral coverage from 350 to 1000 nm,making it an ideal instrument for studying physical processes in the vicinity of supermassive black holes within galaxies.To more accurately assess the technical and scientific performance of the CSST-IFS,it is essential to develop a simulation tool that incorporates realistic effects from all optical components.Such a simulation will form an integral part of the CSST-IFS data and pipeline system,enabling the development of the data reduction pipeline well ahead of actual observations.This paper presents an endto-end simulation workflow for the CSST-IFS,incorporating a wide range of instrumental effects that may influence its spectral and imaging performance.The simulation accounts for optical diffraction effects introduced by all components,such as image slicers and slit array,as well as sub-pixel effects from gratings.It also includes various detector noises,frame-shifting effects,and charge-transfer inefficiency.Real observational conditions-such as target Doppler shift,cosmic rays,and other in-orbit operational effects-are also considered.We describe the technical implementation of the simulation and present results that quantitatively characterize key instrument parameters. 展开更多
关键词 instrumentation spectrographs-methods numerical-techniques imaging spectroscopy
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三诺爱看持续葡萄糖监测系统在成年糖尿病患者血糖监测中有效性和安全性的研究 认领 引用
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作者 高蕾莉 周倩 +5 位作者 费江枫 颜湘 李玉凤 高飞 刘旺 纪立农 《中国糖尿病杂志》 CAS CSCD 北大核心 2026年第5期340-345,共6页
目的评价三诺爱看(Sinocare iCan)i3型和H3型持续葡萄糖监测(CGM)系统应用于成年DM患者BG监测的安全性和有效性。方法选取2022年1月至4月于北京大学人民医院、中南大学湘雅二医院和北京市平谷医院诊治的≥18岁DM患者120例,分为居家佩戴... 目的评价三诺爱看(Sinocare iCan)i3型和H3型持续葡萄糖监测(CGM)系统应用于成年DM患者BG监测的安全性和有效性。方法选取2022年1月至4月于北京大学人民医院、中南大学湘雅二医院和北京市平谷医院诊治的≥18岁DM患者120例,分为居家佩戴三诺爱看i3型的i3组和住院佩戴H3型的H3组,每组60例,以Yellow Spring Instrument生化分析仪为对照器械进行比较,评价其有效性与安全性。结果两组一般资料比较,差异无统计学意义(P>0.05)。i3、H3组与参考值的20/20%一致性(93.65%、95.81%)、测量点落在Clarke误差栅格A+B区比例(99.22%、100.00%)、测量点落在Consensus误差栅格A+B区比例(100.00%、100.00%)、平均相对误差绝对值(8.71%、7.45%)均符合标准。i3、H3组高血糖阈值提醒成功率为90.19%、96.52%,检测成功率为96.06%、96.66%,低血糖阈值提醒成功率为79.44%、80.33%,检测成功率为96.23%、100.00%。易用性评价显示,两组>90%患者对使用的便捷性和佩戴舒适感评价较高,>85%表示传感器附着无痛感,研究过程中监测仪器提前取下或脱落6例,i3组发生不良事件25例次,H3组发生不良事件8例次,未发生与仪器相关的不良事件及严重不良事件。结论三诺爱看i3型和H3型CGM系统具有良好的有效性和安全性。 展开更多
关键词 糖尿病 持续葡萄糖监测系统 Yellow Spring Instrument生化分析仪
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MCI:Multi-channel Imager on the Chinese Space Station Survey Telescope 认领 引用
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作者 Zhen-Ya Zheng Chun Xu +38 位作者 Xiaohua Liu Yong-He Chen Fang Xu Hu Zhan Xinfeng Li Lixin Zheng Huanyuan Shan Jing Zhong Zhaojun Yan Fang-Ting Yuan Chunyan Jiang Xiyan Peng Wei Chen Xue Cheng Zhen-Lei Chen Shuairu Zhu Lin Long Xin Zhang Yan Gong Li Shao Wei Wang Tianyi Zhang Guohao Ju Chenghao Li Wei Wang Zhiyuan Li Tao Wang Junfeng Wang Chengyuan Li Bin Ma Jianguo Wang Lei Wang Dezi Liu Nie Lin Kexin Li Xinrong Wen Maochun Wu Ruqiu Lin Xiang Ji 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2026年第5期266-274,共9页
The Multi-Channel Imager(MCI)is a powerful near-ultraviolet(NUV)and visible imager onboard the Chinese Space Station Survey Telescope(CSST).The MCI provides three imaging channels,which are the NUV channel,the Blue ch... The Multi-Channel Imager(MCI)is a powerful near-ultraviolet(NUV)and visible imager onboard the Chinese Space Station Survey Telescope(CSST).The MCI provides three imaging channels,which are the NUV channel,the Blue channel and the Red channel,with the wavelength ranges of 255–430 nm,430–700 nm,and 700–1000 nm,respectively.MCI’s three channels can target the same field simultaneously,which is unique compared to other imagers onboard the Hubble Space Telescope(HST)or the James Webb Space Telescope(JWST).Each channel employs a CCD focal plane of 9216×9232 pixels and∼7.5×7.5 field of view(FOV),which are≳4 times the FOVs of HST imagers.The MCI’s three channels feature unprecedented sensitivities and FOVs,complementing the NUV and visible capabilities of the CSST for high-precision photometry and weaksignal detection,which would help build a new standard-star system and the deepest UV-Optical exposures for CSST.Rich filter sets of MCI would help explore other areas of science such as local emission line mapping,searching for high-z Lyαemitters,etc.Here we present key design features,results of current ground tests,and suggest observing strategies for the MCI. 展开更多
关键词 instrumentation photometers-space vehicles instruments-techniques photometric-techniques image processing
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“仪器分析”项目式教学在拔尖学生培养中的应用 认领 引用 被引量：3
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作者 胡坪 章弘扬 +6 位作者 杨昊宇 刘鑫 马巍 王氢 杜一平 李大伟 张文清 《大学化学》 CAS 2026年第2期65-72,共8页
为探索仪器分析项目式学习在化学拔尖人才培养中的运用,提出将理论课的项目活动延伸至实践的项目式教学新思路。教师设计真实情景、贴近热点、学科交叉、具有育人功能的项目并进行导学、督学、助学。学生在项目驱动下学习思考、交互合... 为探索仪器分析项目式学习在化学拔尖人才培养中的运用,提出将理论课的项目活动延伸至实践的项目式教学新思路。教师设计真实情景、贴近热点、学科交叉、具有育人功能的项目并进行导学、督学、助学。学生在项目驱动下学习思考、交互合作、整合凝练、深化创新。实践表明,该教学模式有助于培养拔尖学生的自主学习能力和创新思维。 展开更多
关键词 仪器分析 项目式教学 拔尖人才培养
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Mock Observations for the CSST Mission:Main Surveys——the Stray Light 认领 引用
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作者 Jing-Tian Xian Lin Lin +9 位作者 Yue-Dong Fang Xin Zhang You-Hua Xu Xian-Min Meng Hao Tianaa Tian-Yi Zhang Zhang Ban Guo-Liang Li Shu-Yan Xu Wei Wang 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2026年第2期66-77,共12页
Stray light significantly influences the detection capabilities of astronomical telescopes.The actual stray-light level during observations depends not only on the telescope's inherent stray-light suppression capa... Stray light significantly influences the detection capabilities of astronomical telescopes.The actual stray-light level during observations depends not only on the telescope's inherent stray-light suppression capability but also on its operational orbit conditions.Accurate estimation of stray-light levels is crucial for assessing image quality and performing realistic scientific simulations.To rapidly estimate stray-light levels under realistic,complex operational conditions,we developed an analytical model tailored to the Chinese Space Station Survey Telescope.Our model simulates stray-light backgrounds generated by off-field sources such as moonlight,starlight,and earthshine,incorporating the effects of zodiacal light,as well as scattering and ghost images induced by bright infield stars.The proposed method allows quick and accurate evaluation of stray-light conditions,facilitating both image simulation and observational scheduling. 展开更多
关键词 Astronomical Instrumentation Methods and Techniques-methods analytical-telescopes
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Multiparameter hierarchical sensitivity analysis of tilt-to-length coupling noise in Taiji science interferometer 认领 引用
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作者 Fei Xie Xiaodong Peng +2 位作者 Wenlin Tang Mengyuan Zhao Xiaoshan Ma 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第1期399-408,共10页
Tilt-to-length(TTL)coupling noise is a critical issue in space-based gravitational wave detection due to its complex dependence on multiple interacting factors,which complicates the identification of dominant paramete... Tilt-to-length(TTL)coupling noise is a critical issue in space-based gravitational wave detection due to its complex dependence on multiple interacting factors,which complicates the identification of dominant parameters.To address this challenge,we develop a simulation model of the Taiji scientific interferometer,generating noise datasets under multiparameter conditions.Given the uniqueness of the telescope as well as the convergence behavior of the algorithm,the analysis is structured hierarchically:(i)the telescope level and(ii)the optical bench level.A hierarchical framework combining XGBoost and SHapley Additive exPlanations(SHAP)values is employed to model the intricate relationships between parameters and TTL coupling noise,supplemented by sensitivity analysis.Our results identify pointing jitter and telescope radius as the dominant parameters at the telescope level,while the angles of the plane mirrors and beam splitters are most influential at the optical bench level.The parameter space is reduced from 86 dimensions to 14 dimensions without sacrificing model accuracy.This approach offers actionable insights for optimizing the Taiji interferometer design. 展开更多
关键词 space-based gravitational wave detection intrasatellite science interferometer tilt-to-length coupling noise sensitivity analysis
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Direct position determination based on rotating single-baseline interferometer for multiple time-frequency aliased sources 认领 引用
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作者 Yuan ZHANG Guizhou WU +2 位作者 Fucheng GUO Zihan YAO Min ZHANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第2期389-401,共13页
Rotating Single-Baseline Interferometer(RSBI)systems have attracted considerable attention for Direct Position Determination(DPD)due to their simplicity and high localization accuracy.Nevertheless,the growing complexi... Rotating Single-Baseline Interferometer(RSBI)systems have attracted considerable attention for Direct Position Determination(DPD)due to their simplicity and high localization accuracy.Nevertheless,the growing complexity of electromagnetic environments has led to scenarios with multiple time-frequency aliased sources,rendering conventional DPD methods for RSBI systems ineffective.Previous studies have predominantly concentrated on deploying antenna arrays and applying related signal-processing techniques for localization.Typically,these approaches necessitate that the number of physical antennas exceeds the number of sources.For RSBI systems already in practical operation,this would entail the installation of additional physical antennas,which implies equipment recycling and hardware upgrades.In numerous cases,such modifications are unfeasible.This paper proposes a novel Relative Offset-based Direct Position Determination(RO-DPD)method for RSBI systems that can handle multiple time-frequency aliased sources.The proposed method overcomes the challenge of simultaneous positioning without requiring hardware modifications by leveraging time accumulation and algorithmic enhancements.The implementation of the method involves three key steps.Firstly,the rotation of the interferometer is synthesized into a virtual Uniform Circular Array(UCA).Secondly,a novel estimation variable,termed relative offset,is introduced.The variable serves as an intermediate parameter to establish correlation equations between the positions of multiple time-frequency aliased sources and the intercepted signals.Thirdly,the relative offset model in the UCA is transformed into a virtual Uniform Linear Array(ULA)model,from which the cost function can be derived via the Spatial Smoothing(SS)MUSIC algorithm.Theoretical analysis and simulation results verify the effectiveness of the proposed method.Compared with traditional approaches,the RO-DPD method maintains the low complexity of RSBI systems while demonstrating robust performance in complex electromagnetic environments. 展开更多
关键词 Rotating single-baseline interferometer Direct position determination Uniform circular array Array processing
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Mock Observations for the CSST Mission:Main Surveys——The Slitless Spectroscopy Simulation 认领 引用
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作者 Xin Zhang Yue-Dong Fang +14 位作者 Cheng-Liang Wei Guo-Liang Li Feng-Shan Liu Hang-Xin Ji Hao Tian Nan Li Xian-Min Meng Jian-Jun Chen Xia Wang Rui Wang Chao Liu Zhong-Wen Hu Ran Li Peng Wei Jing Tang 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2026年第2期40-48,共9页
The Chinese Space Station Survey Telescope(CSST),slated to become China's largest space-based optical telescope in the coming decade,is designed to conduct wide-field sky surveys with high spatial resolution.Among... The Chinese Space Station Survey Telescope(CSST),slated to become China's largest space-based optical telescope in the coming decade,is designed to conduct wide-field sky surveys with high spatial resolution.Among its key observational modes,slitless spectral observation allows simultaneous imaging and spectral data acquisition over a wide field of view,offering significant advantages for astrophysical studies.Currently,the CSST is in the development phase and lacks real observational data.As a result,the development of its data processing pipeline and scientific pre-research must rely on the mock data generated through simulations.This work focuses on developing a simulation framework for the CSST slitless spectral imaging system,analyzing its spectral dispersing properties and structural design.Additionally,the detection performance of the slitless spectral system is assessed for various astrophysical targets.Simulation results demonstrate that nearly all 1st order spectra are accompanied by corresponding 0th order images,facilitating accurate source identification.Furthermore,the GI spectral band exhibits superior detection efficiency compared to the GV and GU bands,establishing it as the primary observational band for stellar and galactic studies.This work successfully develops a simulation framework for the CSST slitless spectroscopic equipment. 展开更多
关键词 methods numerical-methods data analysis-techniques imaging spectroscopy-space vehicles instruments
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加热和加热仪器使用操作规范建议(二)——直接加热与电炉、电热板、电陶炉、电磁加热搅拌器和电热套的使用 认领 引用 被引量：2
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作者 章文伟 阮婵姿 +15 位作者 王翊如 曾秀琼 宋娟娟 范永仙 刘冬成 任艳平 赵发琼 石梅 胡敏 李婉 王秀云 李维红 邱晓航 范勇 张剑荣 张树永 《大学化学》 CAS 2026年第3期154-162,共9页
加热是化学实验中最常见、最基本的操作之一,不仅可用于溶解、蒸发、干燥、杀菌、灭菌等基础操作,还可加快反应速率,促进化学平衡移动、物质相态转变(如升华),同时用于调控反应条件(如温度依赖性合成)或实现分离纯化(如蒸馏)等。加热方... 加热是化学实验中最常见、最基本的操作之一,不仅可用于溶解、蒸发、干燥、杀菌、灭菌等基础操作,还可加快反应速率,促进化学平衡移动、物质相态转变(如升华),同时用于调控反应条件(如温度依赖性合成)或实现分离纯化(如蒸馏)等。加热方式多样(主要包括直接加热和间接加热)、加热仪器种类繁多。能根据具体实验条件和加热对象、目的、场景和要求,科学选用不同的加热方法和加热仪器并能进行规范操作是有关实验人员的基本素养,对安全、高效完成实验以及得到科学的实验结果和可靠的实验数据具有重要意义。本文主要介绍直接加热及实验室常用于直接加热的电炉、电热板、电陶炉、电磁加热搅拌器和电热套的正确使用及其注意事项,以期为从事化学实验学习、教学和研究的学生、教师及其他相关人员提供参考。 展开更多
关键词 化学实验 直接加热 加热仪器 操作规范
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Prompt fission neutron uranium logging(Ⅲ):logging instrument 认领 引用
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作者 Hai‑Tao Wang Yan Zhang +9 位作者 Chi Liu Jian‑Qiang Xu Li‑Jiao Zhang Zhi‑Feng Liu Xiong‑Jie Zhang Rui Chen Qi Liu Ren‑Bo Wang Shu‑Min Zhou Bin Tang 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第7期115-127,共13页
The domestically developed prompt fission neutron uranium logging(PFNUL)instrument for uranium exploration represents a significant advancement in China’s deep uranium mining efforts,although it has considerable chal... The domestically developed prompt fission neutron uranium logging(PFNUL)instrument for uranium exploration represents a significant advancement in China’s deep uranium mining efforts,although it has considerable challenges and complexity.This paper presents the development of a new prompt fission neutron uranium logging instrument(named UNL4)that integrates a domestic D-T neutron generator,two 3He proportional detectors,a lanthanum bromide(LaBr3)gamma-ray detector,and a digital multi-channel pulse amplitude analyzer.The near 3He detector is shielded with 1 mm of cadmium(Cd)and 5 mm of high-density polyethylene(HDPE),enabling efficient epithermal neutron detection,whereas the far 3He detector measures thermal neutrons.A LaBr3 detector is employed for gamma-ray detection,primarily originating from uranium decay.Highspeed analog-to-digital converter(ADC)and field-programmable gate array(FPGA)technologies are used to achieve rapid acquisition and transmission of both dual-energy neutron time spectra and gamma spectra.Moreover,this paper proposes a fast signal-shaping method,which reduces the dead time effect in 3He detectors on neutron time spectra.Experiments conducted in standard model boreholes with varying uranium contents demonstrated a strong linear relationship between the epithermal-to-thermal neutron ratio(E/T)and uranium content,with a fitting coefficient of R2>0.999,confirming the accuracy of the instrument.The E/T value repeatability,in both short-term(3.16%RSD)and long-term(1.2%RSD)measurements,showed excellent stability.In addition,the instrument demonstrated good performance at neutron-logging speeds of 0.3∼3 m∕min(E/T values)and gamma logging speeds of 1∼10 m∕min.Through measurements in two ore sections of the PU model with uranium contents of 87.1 ppm and 45.6 ppm showed that RD remained below approximately 10%at logging speeds of 0–2 m/s in both cases,satisfying the requirements for engineering applications.This marks the first successful development of a neutron-logging instrument for uranium exploration based on a domestic neutron generator and signifies an important contribution to uranium resource exploration. 展开更多
关键词 Uranium exploration Neutron-logging instrument Pulsed neutron Neutron time spectrum detection
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A Beam Pointing Error Compensation Method for Large Beam Waveguide Refector Antennas Using an Adjustable Mirror 认领 引用
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作者 Pei-Yuan Lian Lei Gao +5 位作者 Hai-Peng Li You-Rui Tao Yuan-Peng Zheng Wu-Lin Zhao De-Qing Kong Cong-Si Wang 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2026年第2期252-266,共15页
Deep space exploration has an extremely high requirement for beam pointing accuracy of the large reflector antenna fed by a beam waveguide system.Beam pointing error compensation is of great importance when the reflec... Deep space exploration has an extremely high requirement for beam pointing accuracy of the large reflector antenna fed by a beam waveguide system.Beam pointing error compensation is of great importance when the reflector is deformed by inevitable external loads.This study introduces an innovative compensation method for such large beam waveguide reflector antennas utilizing an adjustable ellipsoidal mirror in the beam waveguide system.Initially,the effect of the ellipsoidal mirror's position deviation on the beam waveguide system's outgoing focus is analyzed.Subsequently,an equivalent single reflector system for the dual reflector system of the beam waveguide reflector antenna is considered,and the derivation of the focus position deviation for the single reflector caused by the position deviation of the beam waveguide system's outgoing focus is derived.Then,an electromechanical coupling model(EMCM)is formulated,incorporating both the reflector deformation and the ellipsoidal mirror's position error.Finally,with the assumption of adjustability of the ellipsoidal mirror,the study explores the beam pointing error compensation problem based on the EMCM in scenarios of reflector deformation.This paper presents a case study on a 35 m aperture beam waveguide reflector antenna.The results demonstrate that the proposed EMCM achieves high accuracy in calculating the main beam direction,thereby validating the effectiveness of the proposed beam pointing error compensation method for large antennas. 展开更多
关键词 telescopes-methods numerical-Astronomical Instrumentation,Methods and Techniques
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Overview of the Joint-CART Project Between China and Argentina 认领 引用
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作者 Jin-Zeng Li 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2026年第2期267-272,共6页
The China-Argentina Radio Telescope(CART) has a diameter of 40 m, and eight working bands including L, S/X, C, Ku, K, Ka and Q. The S/X dual band cryogenic receivers and the dual beam Q band cryogenic receivers are am... The China-Argentina Radio Telescope(CART) has a diameter of 40 m, and eight working bands including L, S/X, C, Ku, K, Ka and Q. The S/X dual band cryogenic receivers and the dual beam Q band cryogenic receivers are among the first to be installed on CART starting from the testing phase. CART is a milestone joint-project between China and Argentina. It is located at the CESCO Observatory of the National University of San Juan of Argentina, and will be the largest single dish and Very Long Baseline Interferometry(VLBI) unit in Latin America. It is expected to have important synergies with LLAMA and the Argentine-German Geodetic Observatory, and will participate in and contribute to major international VLBI campaigns such as IVS, Square Killometre Array Very Long Baseline Interferometry and maybe also Atacama Large Millimeter/submillimeter Array in the future. 展开更多
关键词 Astronomical Instrumentation,Methods and Techniques-telescopes -instrumentation interferometers
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