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LAMOST CCD camera-control system based on RTS2

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Research in Astronomy and Astrophysics 2018年第5期18卷 69-82页

作者： Yuan Tian Zheng Wang Jian Li Zi-Huang Cao Wei dai shou-Lin Wei yong-Heng Zhao Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of SciencesBeijing 100101 China Computer Technology Application Key Lab of Yunnan Province Kunming University of Science and TechnologyKunming 650500 China University of Chinese Academy of Sciences Beijing 100049 China

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope（LAMOST） is the largest existing spectroscopic survey telescope, having 32 scientific charge-coupled-device（CCD） cameras for acquiring spectra. Stability and automation of the camera-control software are essential, but cannot be provided by the existing system. The Remote Telescope System 2 nd Version（RTS2） is an open-source and automatic observatory-control system. However, all previous RTS2 applications were developed for small telescopes. This paper focuses on implementation of an RTS2-based camera-control system for the 32 CCDs of LAMOST. A virtual camera module inherited from the RTS2 camera module is built as a device component working on the RTS2 framework. To improve the controllability and robustness, a virtualized layer is designed using the master-slave software paradigm, and the virtual camera module is mapped to the 32 real cameras of LAMOST. The new system is deployed in the actual environment and experimentally tested. Finally, multiple observations are conducted using this new RTS2-frameworkbased control system. The new camera-control system is found to satisfy the requirements for automatic camera control in LAMOST. This is the first time that RTS2 has been applied to a large telescope, and provides a referential solution for full RTS2 introduction to the LAMOST observatory control system.

关键词： telescopes - techniques imaging spectroscopy - methods observational - instrumentation detectors

Increased Serum Cystatin C in Early Parkinson’s Disease with Objective Sleep Disturbances

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Chinese Medical Journal 2018年第8期131卷 907-911页

作者： Kang-Ping Xiong yong-Ping dai Jing Chen Jin-Min Xu Yi Wang Ping Feng shou-Jiang You Chun-Feng Liu Department of Neurology and Suzhou Clinical Research Center of Neurological Disease The Second Affiliated Hospital of Soochow University Suzhou Jiangsu 215004 China Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience Soochow University Suzhou Jiangsu 215123 China Clinical Laboratory The Second Affiliated Hospital of Soochow University Suzhou JLangsu 215004 China

Background：Sleep disturbance is one of the major non-motor symptoms which cause the disability of Parkinson’s disease （PD） patients. Cystatin C （CysC） is a more sensitive biomarker than serum creatinine or estimated glomerular filtration rate. Previous studies have reported altered CysC levels in neurodegenerative disorders and sleep disorders. This study aimed to explore the correlations of serum CysC levels and objective sleep disturbances in early PD.Methods：We recruited 106 early PD patients and 146 age- and sex-matched controls. All participants underwent clinical investigation and video-polysomnography. Sleep parameters and serum levels of CysC were measured. Then, we investigated the relationships between CysC and clinical variables and objective sleep disturbances in early PD patients.Results：The mean serum level of CysC was significantly higher in patients with early PD （1.03 ± 0.19 mg/L） compared to controls （0.96 ± 0.15 mg/L, P = 0.009）. There were significantly positive correlations between serum CysC levels and age （r = 0.334, P 〈 0.001）, gender （r = 0.264, P = 0.013）, and creatinine levels （r = 0.302, P = 0.018） in early PD patients. Increased serum CysC levels in early PD patients were significantly associated with higher apnea and hypopnea index （AHI）（r = 0.231, P = 0.017）, especially hypopnea index （r = 0.333, P 〈 0.001）. In early PD patients, elevated serum CysC levels were positively correlated with oxygen desaturation index （r = 0.223, P = 0.021）, percentage of time spent at oxygen saturation （SaO2）〈90% （r = 0.644, P 〈 0.001）, arousal with respiratory event during sleep （r = 0.247, P = 0.013）. On the contrary, the elevated serum CysC levels were negatively correlated with mean and minimal SaO2 （r = ？0.323, ？0.315, both P = 0.001） in PD patients.Conclusions：The level of serum CysC was higher in early PD patients. PD patients with elevated serum CysC levels had more respiratory events and more severe oxygen desaturation. Therefore, the serum CysC levels may predict the severities of sleep-di

关键词： Cystatin C Early Parkinson＇s Disease Objective Sleep Disturbance

Efficacy and safety of stereotactic body radiation therapy combined with transarterial chemoembolization for Chinese intermediate-to advanced-stage hepatocellular carcinoma patients: a systematic review and meta-analysis

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Hepatoma Research 2019年第5期5卷 37-46页

作者： shou-Jie Zhao Bai-Shu dai Zhong-Jun Shao Xi-Lin Du Wei-Lu Zhang yong Long Department of General Surgery Tangdu Hospital of the Fourth Military Medical UniversityXi’an 710038China Department of Epidemiology the Fourth Military Medical UniversityXi’an 710032China

Aim:According to the current guidelines,transarterial chemoembolization(TACE)remains the first-line therapies for hepatocellular carcinoma(HCC)patients at Barcelona Clinic Liver Cancer(BCLC)B-stage and sorafenib is a small molecule target drug for BCLC C-stage.In clinical practice,clinicians have attempted to use stereotactic body radiation therapy(SBRT)plus TACE for treating intermediate-to advanced-stage HCC.However,the therapeutic effects are still inconsistent.This meta-analysis was conducted to elucidate the validity and safety of the combination therapy of SBRT plus TACE in the patients with intermediate-to advanced-stage HCC.Methods:PubMed,MEDLINE,Web of Science,China Biology Medicine,Chinese Knowledge resources integrated and Chinese Scientific Journal Full-Text Database was searched from their inception date to November 2018.The survival rates(half-year,one-year and two-year)were analyzed and compared between the observation groups and the control groups.The negative conversion rate of AFP and the total effective rate were also assessed.Risk ratios(RR)and 95%CI were calculated to express therapeutic effects. ;Results:A total of 1,210 patients from 13 eligible studies were included.The cooperation of TACE and SBRT notably ameliorated the whole survival rates of half-year,one-year,two-year,the negative conversion rate of AFP,and the total effective rate,compared with TACE or SBRT monotherapy[RR(the total effective rate),1.412,95%CI:1.309-1.523,P<0.001],[RR(half-year survival rate),1.196,95%CI:1.121-1.276,P<0.001],[RR(one-year survival rate),1.327,95%CI:1.236-1.424,P<0.001],[RR(two-year survival rate),1.479,95%CI:1.284-1.703,P<0.001]and[RR(negative conversion rate of AFP),1.756,95%CI:1.502-2.059,P<0.001].Sensitivity analysis supported the above results.Conclusion:Combination therapy of SBRT and TACE provides survival benefits in intermediate-to advanced-stage HCC patients compared to monotherapy of SBRT or TACE.

关键词： Transcatheter arterial chemoembolization hepatocellular carcinoma stereotactic body radiation therapy meta-analysis

针对C波段组网SAR卫星的风场优化反演方法研究

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海洋科学 2021年第5期45卷 74-86页

作者：万勇时晓磊戴永寿中国石油大学(华东) 海洋与空间信息学院山东青岛266580 中国石油大学(华东) 控制科学与工程学院山东青岛266580

地球物理模型函数是一种常被用于同极化合成孔径雷达(synthetic aperture radar,SAR)的风场反演方法。在使用该方法提取SAR数据的风速时,需要将风向作为输入信息,这导致反演风速的精度受风向精度的影响,且使SAR风场反演无法独立完成。... 详细信息

地球物理模型函数是一种常被用于同极化合成孔径雷达(synthetic aperture radar,SAR)的风场反演方法。在使用该方法提取SAR数据的风速时,需要将风向作为输入信息,这导致反演风速的精度受风向精度的影响,且使SAR风场反演无法独立完成。为了解决这些问题,通过数值模拟获取仿真的组网SAR卫星数据,3颗SAR同时以不同的入射角观测同一海面。针对仿真的组网SAR卫星数据,发展了一种风场优化反演方法,可以在不输入风向的前提下反演风速,提供参考风向还可以进一步提高风场反演的精度。

关键词：组网卫星合成孔径雷达风场反演

一种适用于小入射角条件下的白冠海面后向散射模型

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海洋科学 2021年第5期45卷 2-8页

作者：曲晓俊李晨戴永寿中国石油大学(华东) 海洋与空间信息学院山东青岛266580

本文提出了一种白冠海面的小入射角星载雷达后向散射模型,模型包括海面非波浪破碎部分和波浪破碎部分的后向散射。在风的作用下,海浪破碎形成白冠,对星载雷达的后向散射信号造成影响。文中利用热带降雨测绘任务卫星搭载的降雨雷达(TRMM ... 详细信息

本文提出了一种白冠海面的小入射角星载雷达后向散射模型,模型包括海面非波浪破碎部分和波浪破碎部分的后向散射。在风的作用下,海浪破碎形成白冠,对星载雷达的后向散射信号造成影响。文中利用热带降雨测绘任务卫星搭载的降雨雷达(TRMM PR)和欧洲中期天气预报中心(ECMWF)的时空匹配数据集,拟合得出小入射角下星载雷达海面波浪破碎部分的后向散射模型,并分别与高斯分布/非高斯的海浪斜率分布海面的准镜面散射模型组成了白冠海面小入射角星载雷达后向散射模型。经实测数据对比,本文提出的由非高斯准镜面散射和考虑波浪破碎组合模型有效。

关键词：白冠海面半经验方法小入射角后向散射模型

大跨径钢箱梁桥正交异性板疲劳裂纹发展规律及处置措施

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公路交通科技 2022年第8期39卷 32-38页

作者：刘汉勇代希华程寿山交通运输部公路科学研究院北京100088 广东省公路建设有限公司广东广州510405

为掌握在用大跨径钢箱梁桥正交异性板疲劳裂纹的发展规律,探寻延长正交异性板使用寿命的加固措施,针对当前正交异性钢桥面板普遍存在的疲劳开裂现状,以国内某大型悬索桥钢箱梁正交异性板为研究对象,采用目视检查与磁粉探伤相结合的方法... 详细信息

为掌握在用大跨径钢箱梁桥正交异性板疲劳裂纹的发展规律,探寻延长正交异性板使用寿命的加固措施,针对当前正交异性钢桥面板普遍存在的疲劳开裂现状,以国内某大型悬索桥钢箱梁正交异性板为研究对象,采用目视检查与磁粉探伤相结合的方法,检查统计了该桥正交异性板的可见裂纹和疑似隐性裂纹数量。根据疲劳裂纹检查结果,分析了其疲劳裂纹发展与近7 a的日均交通量的关联关系。从力学性能、构造措施与焊接工艺3方面进行了疲劳裂纹开裂机理分析,明晰了5类疲劳裂纹萌生和发展的机理。在此基础上,针对每一类疲劳裂纹给出了修复方法。为改善正交异性钢桥面板的整体受力性能,提出了增加空腹式横隔板的正交异性板钢箱梁加固措施,以该桥钢箱梁标准段为实际案例,设计了空腹式横隔板加固方案,并对增加空腹式横隔板后的钢箱梁标准段进行了有限元分析。结果表明:除Ⅳ类疲劳裂纹与交通量不存在明显相关性以外,其余疲劳裂纹(Ⅰ,Ⅱ,Ⅲ,Ⅴ,Ⅵ类)的形成原因均与交通量增长有较密切的相关性。提出的方法可以显著降低正交异性板疲劳细节处的应力水平,改善正交异性钢桥面板的受力性能,提高正交异性板的疲劳寿命。根据研究结果,建议将常规疲劳裂纹修复,并增加空腹式横隔板作为在用钢箱梁正交异性板的有效加固措施。

关键词：桥梁工程疲劳裂纹处置措施数值模拟正交异性钢桥面板疲劳裂纹发展规律

基于时空图卷积神经网络的光伏发电功率超短期预测方法

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热能动力工程 2023年第9期38卷 152-157,173页

作者：李立刚孙立群戴永寿李林中国石油大学(华东)海洋与空间信息学院山东青岛266555

为了解决传统光伏电站超短期功率预测方法不能同时准确提取发电功率的时间和空间特征的问题,提出一种基于时空图卷积神经网络的光伏发电功率超短期预测方法。针对同一区域内的多个光伏电站,首先对电站进行图建模,利用图卷积网络(GCN)与... 详细信息

为了解决传统光伏电站超短期功率预测方法不能同时准确提取发电功率的时间和空间特征的问题,提出一种基于时空图卷积神经网络的光伏发电功率超短期预测方法。针对同一区域内的多个光伏电站,首先对电站进行图建模,利用图卷积网络(GCN)与门控线性单元(GLU)提取发电功率的时空特征。利用提取到的时空特征信息以及区域内光伏电站的历史发电功率数据训练预测模型,最终实现对多个光伏电站发电功率超短期预测。实验结果表明,该方法能够将超短期功率预测均方根误差减小至1.122%,对工作人员根据实际情况进行电网的调度管理具有重要意义。

关键词：时空图卷积光伏电站功率预测

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一种基于信息几何的矩阵DP-TBD算法

电子学报 2017年第4期45卷 882-889页

作者：赵兴刚王首勇郑岱堃空军预警学院三系重点实验室湖北武汉430019

由于单帧相参积累在一些情况下存在较严重的信息损失,且这种损失会随着多帧非相参积累而进一步放大,使得传统动态规划检测前跟踪(DP-TBD)算法的性能下降.本文基于信息几何理论提出了一种矩阵DP-TBD算法,该方法直接利用每个分辨单元的协... 详细信息

由于单帧相参积累在一些情况下存在较严重的信息损失,且这种损失会随着多帧非相参积累而进一步放大,使得传统动态规划检测前跟踪(DP-TBD)算法的性能下降.本文基于信息几何理论提出了一种矩阵DP-TBD算法,该方法直接利用每个分辨单元的协方差矩阵进行多帧积累,将单帧和多帧积累融为一体,避免了单帧积累存在的信息损失,具有更好的检测和跟踪性能.最后通过仿真实验验证了本文算法的有效性.

关键词：动态规划检测前跟踪信息几何测地线距离黎曼均值

一种改进全局最近邻关联的无人船双雷达目标跟踪算法

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舰船科学技术 2022年第22期44卷 58-62,75页

作者：王宁李立刚戴永寿金久才中国石油大学(华东)控制科学与工程学院山东青岛266580 中国石油大学(华东)海洋与空间信息学院山东青岛266580 自然资源部第一海洋研究所海洋物理与遥感研究室山东青岛266061

针对无人船载双雷达目标跟踪问题,提出一种基于全局最近邻关联(GNN)的无人船雷达目标跟踪算法。建立随船正北坐标系,对传感器的测量结果进行坐标变换,利用GNN算法对目标进行跟踪。针对GNN算法在虚警、漏报情况下易发生误关联的缺点,提... 详细信息

针对无人船载双雷达目标跟踪问题,提出一种基于全局最近邻关联(GNN)的无人船雷达目标跟踪算法。建立随船正北坐标系,对传感器的测量结果进行坐标变换,利用GNN算法对目标进行跟踪。针对GNN算法在虚警、漏报情况下易发生误关联的缺点,提出一种跟踪门的设置方法,利用关联代价与模糊隶属度对目标进行2次滤除来提高GNN的关联正确率。最后,利用安装有激光雷达与毫米波雷达的无人船在实际海上环境进行试验,试验结果表明,与未改进的跟踪算法相比,本文提出的改进跟踪算法正确率提高了25.87%,验证了算法的可行性和有效性。

关键词：无人船激光雷达毫米波雷达目标跟踪