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Design and measurement of signal processing system for cavity beam position monitor

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Nuclear Science and Techniques 2013年第2期24卷 1-6页

作者： WANG Baopeng LENG Yongbin YU Luyang ZHOU Weimin YUAN Renxian chen zhichu Shanghai Institute of Applied Physics Chinese Academy of SciencesJiading campus University of the Chinese Academy of Sciences

In this paper,in order to achieve the output signal processing of cavity beam position monitor(CBPM),we develop a digital intermediate frequency receiver architecture based signal processing system,which consists of radio frequency(RF) front end and high speed data acquisition *** beam position resolution in the CBPM signal processing system is superior to 1μ*** signal processing algorithms,fast Fourier transform(FFT) and digital down converter(DDC),are evaluated offline using MATLAB platform,and both can be used to achieve,the CW input signal,position resolutions of 0.31μm and 0.10μm at -16 *** DDC algorithm for its good compatibility is downloaded into the FPGA to realize online measurement,reaching the position resolution of 0.49μm due to truncation *** whole system works well and the performance meets design target.

关键词：信号处理系统位置分辨率在线测量设计目标显示器光束 MATLAB平台信号处理算法

Monitoring the charge bunch-by-bunch for the SSRF storage ring:Development and application

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Nuclear Science and Techniques 2010年第4期21卷 193-196页

作者： LENG Yongbin YAN Yingbin YU Luyang YUAN Renxian chen zhichu ZHOU Weimin Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Shanghai 201800 China

Bunch charge uniformity controlling is very important for top-up operation of the storage *** order to monitor filling pattern and measure the bunch charge precisely,a PXI waveform digitizer-based data acquisition system has been developed to retrieve bunch charge information from BPM pickup *** effective sampling rate is extended to 400 GHz by waveform rebuilding technology,which overlays multi-turn data into single turn with real time sampling rate of 8 *** on-line evaluation indicates that resolution and linearity of the charge measurement are better than 0.5% at input range of 0.5-12nC.

关键词：储存环开发监测波形示波器应用光源上海束团

Baseline recovery method to measure bunch charge under low-current mode of SSRF

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Nuclear Science and Techniques 2011年第5期22卷 261-264页

作者： chen zhichu LENG Yongbin ZOU Yi YAN Yingbin ZHOU Weimin Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Shanghai 201800 China

The top-up injection mode of Shanghai Synchrotron Radiation Facility(SSRF) needs precise measurement of the beam bunch *** is performed by an integration current transformer,but the beam current is too low to neglect the background *** order to wipe out the noise coming from the ground loops,the adaptable polynomial fitting method is used to extract the baseline,instead of using the constant background or the linear background model. Test results show that the system resolution can be improved to <3%.

关键词：上海同步辐射装置电流模式光源基线背景噪声电流互感器 SSRF 接地回路

A pathological joint-liver axis mediated by matrikine-activated CD4^(+)T cells

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2679-2693页

作者： Junzhi Yi Hui Zhang Fangyuan Bao zhichu chen Yuliang Zhong Tianning Ye Xuri chen Jingyi Qian Mengya Tian Min Zhu Zhi Peng Zongyou Pan Jianyou Li Zihao Hu Weiliang Shen Jiaqi Xu Xianzhu Zhang Youzhi Cai Mengjie Wu Hua Liu Jing Zhou Hongwei Ouyang Department of Sports Medicine of the Second Affiliated Hospital and Liangzhu LaboratoryZhejiang University School of MedicineHangzhouChina Dr.Li Dak Sum&Yip Yio Chin Center for Stem Cells and Regenerative Medicine Zhejiang University School of MedicineHangzhouChina Stomatology Hospital School of StomatologyZhejiang University School of MedicineZhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouChina The MOE Key Laboratory of Biosystems Homeostasis&Protection The Key Laboratory of Cancer Molecular Cell Biology of Zhejiang ProvinceLife Sciences InstituteZhejiang UniversityHangzhouChina Department of Orthopedics Huzhou Central HospitalAffiliated Huzhou HospitalZhejiang University School of MedicineHuzhouChina China Orthopedic Regenerative Medicine Group(CORMed) HangzhouChina Department of Orthopedics The First Affiliated HospitalZhejiang University School of MedicineHangzhouChina

The knee joint has long been considered a closed *** pathological effects of joint diseases on distant organs have not been ***,our clinical data showed that post-traumatic joint damage,combined with joint bleeding(hemarthrosis),exhibits a worse liver function compared with healthy *** mouse model,hemarthrosis induces both cartilage degeneration and remote liver ***,we found that hemarthrosis induces the upregulation in ratio and differentiation towards Th17 cells of CD4^(+)T cells in peripheral blood and *** of CD4^(+)T cells reverses hemarthrosis-induced liver *** of cartilage matrix induced by hemarthrosis upregulates serological type Ⅱ collagen(COL Ⅱ),which activates CD4^(+)T *** application of a COL Ⅱ antibody blocks the ***,bulk RNAseq and single-cell qPCR analysis revealed that the cartilage Akt pathway is inhibited by blood ***-articular application of Akt activator blocks the cartilage degeneration and thus protects against the liver impairment in mouse and pig *** together,our study revealed a pathological joint-liver axis mediated by matrikine-activated CD4^(+)T cells,which refreshes the organ-crosstalk axis and provides a new treatment target for hemarthrosis-related disease.

关键词： degeneration damage inhibited

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上海光源工作点在线监测系统

强激光与粒子束 2015年第4期27卷 255-259页

作者：赖龙伟阎映炳陈之初冷用斌中国科学院上海应用物理研究所上海201800

上海光源储存环运行在恒流注入(top-up)模式下每10min注入一次,注入引起的β振荡为测量工作点提供了有利条件。通过数字束流位置处理器采集储存环注入时的逐圈数据,对数据进行快速傅里叶变换计算获得工作点,以此搭建了刷新间隔为10min... 详细信息

上海光源储存环运行在恒流注入(top-up)模式下每10min注入一次,注入引起的β振荡为测量工作点提供了有利条件。通过数字束流位置处理器采集储存环注入时的逐圈数据,对数据进行快速傅里叶变换计算获得工作点,以此搭建了刷新间隔为10min的工作点在线监测系统。2014年上半年的运行结果表明,该系统能够有效检测工作点变化并评估加速器工作点可达到的最优性能。利用该系统能够及时发现加速器运行异常,并结合各设备运行状态可有效定位异常原因。

关键词：工作点在线监测恒流注入数字束流位置处理器

电子储存环注入过程中补注电荷的三维位置信息提取

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原子能科学技术 2020年第11期54卷 2238-2244页

作者：周逸媚冷用斌张宁高波陈之初中国科学院上海应用物理研究所上海201800 中国科学院大学北京100049 中国科学院上海高等研究院上海201204

电子储存环的注入过程是特殊的瞬态过程,研究补注电荷和储存电荷的三维位置融合过程可在线评估注入器与储存环的匹配度,也可为下一代光源诊断系统的搭建奠定技术基础。目前,上海同步辐射光源束流检测组研发了一套基于纽扣电极拾取信号... 详细信息

电子储存环的注入过程是特殊的瞬态过程,研究补注电荷和储存电荷的三维位置融合过程可在线评估注入器与储存环的匹配度,也可为下一代光源诊断系统的搭建奠定技术基础。目前,上海同步辐射光源束流检测组研发了一套基于纽扣电极拾取信号和高速采集板卡的三维逐束团诊断系统,可精确测量逐束团三维位置。注入过程中补注电荷的三维位置信息可通过电荷加权平均法和比例系数法分别提取。通过对补注电荷横向betatron振荡和纵向同步振荡的分析,可原位提取betatron振荡振幅、同步振荡振幅、初始到达时间、同步振荡阻尼时间等多个动态参数,不需提供特别的机器研究时间,为储存环动力学研究提供了有力工具。

关键词：三维位置补注电荷注入瞬态过程横向betatron振荡纵向同步振荡

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提升中国医疗保障水平与公平性研究

现代财经（天津财经大学学报） 2007年第1期27卷 24-28页

作者：陈之楚吴静瀛天津财经大学金融系天津300222

一个国家医疗保障水平表明其卫生费用投入总量与GDP之间的关系。实证分析与通过比较表明,我国卫生费用投入结构发生了很大变化,显示政府投入比例下降,个人投入比例上升;我国卫生费用投入低于世界平均水平。运用聚类方法分析的结果,建国... 详细信息

一个国家医疗保障水平表明其卫生费用投入总量与GDP之间的关系。实证分析与通过比较表明,我国卫生费用投入结构发生了很大变化,显示政府投入比例下降,个人投入比例上升;我国卫生费用投入低于世界平均水平。运用聚类方法分析的结果,建国以来,中国以低于世界平均水平的医疗卫生投入,取得了高于世界平均水平的健康成果,证实了我国医疗保障取得的成绩。对我国实际情况,提出完善医疗保障制度的见解。

关键词：医疗保障水平卫生费用国际比较