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基于正交信号校正的秸秆青贮饲料粗蛋白近红外分析模型传递方法

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分析化学 2012年第4期40卷 596-601页

作者：刘贤韩鲁佳杨增玲黄光群中国农业大学工学院

探讨了基于不同数据预处理方法的正交信号校正在秸杆饲料近红外光谱模型传递中的应用。以141个秸杆青贮饲料样品为研究对象,以其粗蛋白含量为目标参数,研究了基于无处理、局部中心化、全局中心化和Z-score标准化预处理方法的正交信号校... 详细信息

探讨了基于不同数据预处理方法的正交信号校正在秸杆饲料近红外光谱模型传递中的应用。以141个秸杆青贮饲料样品为研究对象,以其粗蛋白含量为目标参数,研究了基于无处理、局部中心化、全局中心化和Z-score标准化预处理方法的正交信号校正,在源仪器(SPECTRUM ONE NTS)和目标仪器1(AN-TARIS)与目标仪器2(FOSS 6500)之间的模型传递效果。实验表明:对于两台傅里叶变换型近红外光谱仪,采用局部中心化、全局中心化和Z-score标准化预处理方法的正交信号校正均可成功实现模型传递,其中局部中心化和全局中心化法的作用效果基本一致,且优于Z-score标准化法。对于傅立叶变换和光栅型近红外光谱仪,全局中心化的作用效果明显优于其它3组处理效果,且只有全局中心化预处理的正交信号校正传递后的模型可用于实际预测。

关键词：近红外模型传递正交信号校正预处理方法秸秆饲料

Design and tests of the prototype a beam monitor of the CSR external target experiment

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Nuclear Science and Techniques 2022年第3期33卷 137-151页

作者： Hu-Lin Wang Zhen Wang Chao-Song Gao Jian-Wei Liao Xiang-Ming Sun Hai-Bo Yang Cheng-Xin Zhao Jun Liu Peng Ma Zi-Li Li Bi-Hui You Ping Yang Di Guo Le Xiao Dong-Liang Zhang Yue-Zhao Zhang Sheng Dong Wan-han Feng Yu-Xin Qiao Zheng-Yu Hu Qing-Wen Ye zeng-Tao Guo guang-Ming Huang Feng Liu PLAC Key Laboratory of Quark and Lepton Physics(MOE)Central China Normal UniversityWuhan 430079China Hubei Provincial Engineering Research Center of Silicon Pixel Chip&Detection Technology Wuhan 430079China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

A prototype beam monitor was designed to provide tracking information for heavy-ion projectiles for the cool storage ring(CSR)external target experiment(CEE)at the heavy Ion Research Facility in Lanzhou(HIRFL).High granularity and direct charge sensing are the main features of this *** measures the beam position in a two-dimensional(2D)plane transverse to the beam direction on an event-by-event *** current design consists of two field cages inside a single vessel that operates independently and has electrical drift fields in orthogonal *** tests of the prototype were performed using a^(241)Am a *** results show that a spatial resolution of less than 40μm and a time resolution of less than 600 ns can be achieved.

关键词： CEE Beam monitor heavy ion Topmetal sensor Tracking Field cage

通过光学相干断层扫描图像进行自动视网膜分割评估黄斑水肿的投影面积

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生物化学与生物物理进展 2020年第10期47卷 1097-1108页

作者：张章唐艳红曾兴晖熊红莲曾亚光韩定安佛山科学技术学院物理与光电工程学院佛山528000

本文提出一种自动视网膜分割方法,以评估光学相干断层扫描(OCT)图像中黄斑水肿(ME)在视网膜特定层上的投影面积.首先使用基于权重矩阵的优化最短路径最快算法对10个视网膜层边界进行分割,这有效降低了算法对血管阴影的敏感性.然而,ME的... 详细信息

本文提出一种自动视网膜分割方法,以评估光学相干断层扫描(OCT)图像中黄斑水肿(ME)在视网膜特定层上的投影面积.首先使用基于权重矩阵的优化最短路径最快算法对10个视网膜层边界进行分割,这有效降低了算法对血管阴影的敏感性.然而,ME的存在将导致水肿区域的分割不准确.因此,使用强度阈值方法提取每个OCT图像中的水肿区域,并将该区域中的值设置为零,并确保获得的分割边界可以自动穿过而不是绕过水肿区域.同时使用最小值投影来计算ME在不同层的投影面积.为了测试该方法,使用了从Topcon OCT机器收集的数据.在轴向和B扫描方向上测得的黄斑区域分辨率分别为11.7μm和46.8μm.与手动分割相比,视网膜层边界分割的平均绝对误差和标准偏差为(4.5±3.2)μm.因此,所提出的方法为评估水肿提供了一种自动、无创和定量的工具.

关键词：光学相干断层扫描黄斑水肿视网膜分割投影面积评估

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钻具螺纹接头力学性能计算方法及其应用

上海交通大学学报 2005年第7期39卷 1058-1062页

作者：林元华施太和姚振强袁光杰赵鹏韩建增西南石油学院石油管力学和环境行为重点实验室成都610500 上海交通大学机械与动力工程学院上海200030 宝山钢铁股份公司上海201900

针对钻具螺纹接头轴对称特点以及所承受复合载荷的特点,应用接触力学理论建立了将三维问题退化为拟三维问题的有限元半解析法,推导出钻具螺纹在任意载荷作用下的载荷、位移和刚度矩阵公式,并编制了计算钻具螺纹力学性能的弹塑性有限元... 详细信息

针对钻具螺纹接头轴对称特点以及所承受复合载荷的特点,应用接触力学理论建立了将三维问题退化为拟三维问题的有限元半解析法,推导出钻具螺纹在任意载荷作用下的载荷、位移和刚度矩阵公式,并编制了计算钻具螺纹力学性能的弹塑性有限元力学软件.软件计算结果和实验数据比较一致,表明该力学模型和软件是可靠的.该软件可用于评价API钻具螺纹的力学性能,同时也可用于设计新型钻具螺纹,基于此原理,研制了双台肩钻具螺纹接头并得到应用.

关键词：钻具接头有限元分析半解析法拟三维

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对一类RSA变体的攻击

信息工程大学学报 2017年第2期18卷 190-194页

作者：申意胡云山曾光韩文报信息工程大学河南郑州450001 数学工程与先进计算国家重点实验室江苏无锡21125

讨论RSA公钥密码体制在素因子p满足等式ex+by+c≡0(mod p)条件下的安全性,研究了对其格攻击的方法。利用方程小根求解问题对其进行攻击,攻击结果表明:当参数x,y满足|x||y| 详细信息

讨论RSA公钥密码体制在素因子p满足等式ex+by+c≡0(mod p)条件下的安全性,研究了对其格攻击的方法。利用方程小根求解问题对其进行攻击,攻击结果表明:当参数x,y满足|x||y|

关键词：密码学 RSA公钥密码体制格基约化 LLL算法方程小根求解

近红外反射光谱分析技术快速检测复合化学肥料中肉骨粉含量的研究

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红外与毫米波学报 2006年第4期25卷 267-270页

作者：朱荣光韩鲁佳杨增玲甘利雅弘中国农业大学工学院北京100083 日本畜产草地科学研究所

肉骨粉是产生牛海绵状脑病(BSE)的主要原因,根治BSE很有必要研究饲料和肥料中的肉骨粉的检出方法.本文探讨了利用近红外反射光谱(NIRS)分析技术快速检测复合化学肥料中肉骨粉含量的可行性.对混合有肉骨粉的4种复合肥料样品和这些所有样... 详细信息

肉骨粉是产生牛海绵状脑病(BSE)的主要原因,根治BSE很有必要研究饲料和肥料中的肉骨粉的检出方法.本文探讨了利用近红外反射光谱(NIRS)分析技术快速检测复合化学肥料中肉骨粉含量的可行性.对混合有肉骨粉的4种复合肥料样品和这些所有样品,采用偏最小二乘法(PLS),获得5个校正模型的决定系数(R2)分别为0.9989、0.9957、0.9977、0.9969和0.9955,相对标准偏差(RSD)分别为3.82%、4.07%、3.92%、3.99%和5.13%;检验集的真值和模型预测值的决定系数(r2)分别为0.9951、0.9981、0.9960、0.9943和0.9884,RSD分别为6.74%、2.58%、3.55%、6.17%和7.44%.结果表明,利用NIRS分析技术可以成功检测出复合肥料中肉骨粉的含量.

关键词：肉骨粉复合化学肥料近红外反射光谱

Measurement of the ^(232)Th(n,f)cross section in the 1-200 MeV range at the CSNS Back-n

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Nuclear Science and Techniques 2023年第8期34卷 142-153页

作者： Zhi-Zhou Ren Yi-Wei Yang Yong-Hao Chen Rong Liu Bang-Jiao Ye Jie Wen Hai-Rui Guo Zi-Jie han Qi-Ping Chen Zhong-Wei Wen Wei-Li Sun han Yi Xing-Yan Liu Tao Ye Jiang-Bo Bai Qi An Jie Bao Yu Bao Ping Cao Hao-Lei Chen Zhen Chen zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing Gao Xiao-Long Gao Min-Hao Gu Chang-Cai han Guo-Zhu he Yong-Cheng he Yang Hong Yi-Wei Hu han-Xiong Huang Xi-Ru Huang Hao-Yu Jiang Wei Jiang Zhi-Jie Jiang han-Tao Jing Ling Kang Bo Li Chao Li Jia-Wen Li Qiang Li Xiao Li Yang Li Jie Liu Shu-Bin Liu Ze Long guang-Yuan Luan Chang-Jun Ning Meng-Chen Niu Bin-Bin Qi Jie Ren Xi-Chao Ruan Zhao-Hui Song Kang Sun Zhi-Jia Sun Zhi-Xin Tan Jing-Yu Tang Xin-Yi Tang Bin-Bin Tian Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Xiao-guang Wu Xuan Wu Li-Kun Xie Xiao-Yun Yang Li Yu Tao Yu Yong-Ji Yu Guo-Hui Zhang Lin-Hao Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Zhi-Yong Zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China Institute of Applied Physics and Computational Mathematics Beijing 100088China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230027China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China

The ^(232)Th(n,f)cross section is very important in basic nuclear physics and applications based on the Th/U fuel *** the time-of-flight method and a multi-cell fast-fission ionization chamber,a novel measurement of the^(232)Th(n,f)cross sec-tion relative to^(235)U in the 1–200 MeV range was performed at the China Spallation Neutron Source Back-n white neutron source(Back-n).The fission event-neutron energy spectra of^(232)Th and^(235)U fission cells were measured in the single-bunch *** 232Th/235U fission cross-sectional ratios were obtained,and the measurement uncertainties were 2.5–3.7%for energies in the 2–20 MeV range and 3.6–6.2%for energies in the 20–200 MeV ***^(232)Th(n,f)cross section was obtained by introducing the standard cross section of^(235)U(n,f).The results were compared with those of previous theoreti-cal calculations,measurements,and *** measured 232Th fission cross section agreed with the main evaluation results in terms of the experimental uncertainty,and 232Th fission resonances were observed in the 1–3 MeV *** present results provide^(232)Th(n,f)cross-sectional data for the evaluation and design of Th/U cycle nuclear systems.

关键词： 232Th(n f)cross section Fast-fission ionization chamber Back-n white neutron source

Back-n white neutron source at CSNS and its applications

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Nuclear Science and Techniques 2021年第1期32卷 95-104页

作者： Jing-Yu Tang Qi An Jiang-Bo Bai Jie Bao Yu Bao Ping Cao Hao-Lei Chen Qi-Ping Chen Yong-Hao Chen Zhen Chen zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing Gao Xiao-Long Gao Min-Hao Gu Chang-Cai han Zi-Jie han Guo-Zhu he Yong-Cheng he Yang Hong Yi-Wei Hu han-Xiong Huang Xi-Ru Huang Hao-Yu Jiang Wei Jiang Zhi-Jie Jiang han-Tao Jing Ling Kang Bo Li Chao Li Jia-Wen Li Qiang Li Xiao Li Yang Li Jie Liu Rong Liu Shu-Bin Liu Xing-Yan Liu Ze Long guang-Yuan Luan Chang-Jun Ning Meng-Chen Niu Bin-Bin Qi Jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-Hui Song Kang Sun Zhi-Jia Sun Zhi-Xin Tan Xin-Yi Tang Bin-Bin Tian Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Zhong-Wei Wen Xiao-guang Wu Xuan Wu Li-Kun Xie Xiao-Yun Yang Yi-Wei Yang han Yi Li Yu Tao Yu Yong-Ji Yu Guo-Hui Zhang Lin-Hao Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Zhi-Yong Zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu 无 State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China The CSNS Back-n Collaboration

Back-streaming neutrons from the spallation target of the China Spallation Neutron Source(CSNS)that emit through the incoming proton channel were exploited to build a white neutron beam facility(the so-called Back-n white neutron source),which was completed in March *** Back-n neutron beam is very intense,at approximately 29107 n/cm2/s at 55 m from the target,and has a nominal proton beam with a power of 100 kW in the CSNS-I phase and a kinetic energy of 1.6 GeV and a thick tungsten target in multiple slices with modest moderation from the cooling water through the *** addition,the excellent energy spectrum spanning from 0.5 eV to 200 MeV,and a good time resolution related tothe time-of-flight measurements make it a typical white neutron source for nuclear data measurements;its overall performance is among that of the best white neutron sources in the *** with advanced spectrometers,detectors,and application utilities,the Back-n facility can serve wide applications,with a focus on neutron-induced cross-sectional *** article presents an overview of the neutron beam characteristics,the experimental setups,and the ongoing applications at Backn.

关键词： White neutron source Nuclear data measurements Experimental setups Neutron applications

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串联电池组的母线式电压采集系统优化设计

兵工学报 2014年第5期35卷 577-582页

作者：马晓军可荣硕魏曙光项宇曾庆含装甲兵工程学院控制工程系北京100072

动力电池组、燃料电池等通常采用多路串联式供电结构,单体电压参数为反映电池性能的重要指标。设计了一种母线式电压采集系统,该系统利用光控继电器把电池单体加载到测量母线,通过移位寄存器74HC164逻辑控制实现电池单体电压巡检,经过... 详细信息

动力电池组、燃料电池等通常采用多路串联式供电结构,单体电压参数为反映电池性能的重要指标。设计了一种母线式电压采集系统,该系统利用光控继电器把电池单体加载到测量母线,通过移位寄存器74HC164逻辑控制实现电池单体电压巡检,经过一套信号调理、隔离电路处理,使整体测量一致性提高,相比于采用译码器的逻辑电路,从元件数量和控制程序上都得到优化。集成PIC18F2580最小系统及CAN总线接口,实现模块化及可扩展性。实验结果表明:该采集系统性能稳定,满足测量精度要求,并成功应用于3 kW和10 kW燃料电池系统。

关键词：电气工程动力电池组燃料电池测量母线电压采集动态加载