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Journal of Cotton Research 2021年第1期

作者： RAZA Irum hu daowu AHMAD Adeel LI Hongge HE Shoupu NAZIR Mian Faisal WANG Xiaoyang JIA Yinhua PAN Zhaoe ZHANG Peng YASIR Muhammad IQBAL Muhammad Shahid GENG Xiaoli WANG Liru PANG Baoyin DU Xiongming

RAZA Irum1, hu daowu1, AHMAD Adeel1, LI Hongge1, HE Shoupu1, NAZIR Mian Faisal1, WANG Xiaoyang1,JIA Yinhua1, PAN Zhaoe1, ZHANG Peng1, YASIR Muhammad1, IQBAL Muhammad Shahid1, GENG Xiaoli1,WANG Liru1, PANG Baoyin1and D...

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A real-time peak-detection approach for nuclear detection and its implementation on an FPGA

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Radiation Detection Technology and Methods 2020年第2期4卷 161-173页

作者： Yao Yang daowu Li Yan Li Jipeng Zhang Tingting hu Yan Li Long Wei Beijing Engineering Research Center of Radiographic Techniques and Equipment Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China The College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 610059China

Introduction Detecting a pulse correctly is a key process in nuclear *** the radiation emission is a random process,it is hard to design a suitable peak-detection approach in *** error detection will influence the final energy spectrum and flood *** order to improve the result of nuclear detection,this paper proposes a novel method for nuclear signal peak-detection,which can improve both the effective counting rate and the quality of pulses in *** The main method is to establish a normalized reference pulse regardless of waveform through the least squares *** calculating the loss between the incoming data stream and normalized reference pulse,this algorithm retains the pulses whose loss is below the *** select the threshold based on statistical *** algorithm is implemented on field programmable gate array(FPGA)successfully,and this process is able to work in *** The result shows that the effective counting rate can improve about 19.8%and more than 99%pile-up and error pulses will be *** analyzing reserved pulses,the energy spectrum and flood histogram could be well *** energy resolution increases 11%compared with traditional ***,due to this new algorithm,the low-energy threshold can be lower.

关键词： Least square method Peak detection Pulse pile-up(PPU) Real-time calculation FPGA

Image reconstruction for the coded aperture system in nuclear safety and security using a Monte Carlo-based system matrix

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辐射探测技术与方法(英文) 2023年第2期7卷 263-270页

作者： Yue Yu Xiaoli Sun Zhiming Zhang Shuangquan Liu Xiuzuo Liang daowu Li Lei Shuai Tingting hu Long Wei Beijing Engineering Research Center of Radiographic Techniques and Equipment Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing100049China Jinan Laboratory of Applied Nuclear Science Jinan250131China

Purpose Accurate localization of radioactive materials is critical to nuclear safety and nuclear security.A coded aperture imaging system provides a visualization ***,the correlation method has poor reconstruction performance for sources with low counts and for extended *** In this study,a Monte Carlo optimization-based MLEM algorithm(MC-MLEM)is *** system matrix was obtained by accurate Monte Carlo simulation,so the physical effects such as mask penetration that affect the imaging process were taken into account in the MLEM *** the simulation process,the normalization of the system matrix was realized by controlling the source at different position of the source plane to have the same activity and emission *** The experimental results showed that compared with the correlation method,the MC-MLEM algorithm could improve the signal-to-noise ratio and angular resolution and locate the source position quickly and accurately under low count ***,the MC-MLEM algorithm could reconstruct the shape of the extended source and the expected activity ratio of cold-hot sources with large activity *** The MC-MLEM algorithm improved the imaging results and enhanced the reconstruction performance.

关键词： Coded aperture System matrix Image reconstruction Low count imaging Extended sources

基于主成分分析和隶属函数的棉花种子萌发期耐涝性鉴定评价

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中国棉花 2023年第3期50卷 1-5页

作者：罗礽兰胡道武王静静潘兆娥贾银华何守朴王立如庞保印陈全家杜雄明新疆农业大学农学院/棉花教育部工程研究中心乌鲁木齐830052 中国农业科学院棉花研究所/棉花生物学国家重点实验室河南安阳455000

参照棉花耐渍涝性鉴定技术标准,在棉花种子萌发期模拟淹水胁迫,采用主成分分析、隶属函数法及聚类分析方法,分析了涝渍胁迫处理对6份陆地棉材料出苗率、株高、主根长、子叶叶绿素含量(SPAD值)、幼苗鲜物质质量、幼苗干物质质量的影响。... 详细信息

参照棉花耐渍涝性鉴定技术标准,在棉花种子萌发期模拟淹水胁迫,采用主成分分析、隶属函数法及聚类分析方法,分析了涝渍胁迫处理对6份陆地棉材料出苗率、株高、主根长、子叶叶绿素含量(SPAD值)、幼苗鲜物质质量、幼苗干物质质量的影响。结果表明:幼苗鲜物质质量、株高、主根长、出苗率、幼苗干物质质量和SPAD值可以作为棉花萌发期耐涝性鉴定的指标;6份参试材料的耐涝性强弱顺序依次为402、晋棉36、冀丰908、宛棉3号、苏棉9号、TM-1,其中402和晋棉36为耐涝性较强的材料。相关研究方法可为批量鉴定和评价棉花种质资源的耐涝性提供依据。

关键词：棉花萌发期耐涝性鉴定评价指标主成分分析隶属函数

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Compact MPPC-based coded aperture imaging camera for dual-particle detection

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Radiation Detection Technology and Methods 2021年第1期5卷 61-70页

作者： Jing Guo Xiaoyu Pang Jiale Cai daowu Li Xiaoming Wang Xuanhou hu Yue Yu Shuangquan Liu Xiuzuo Liang Yiwen Zhang Lei Shuai Long Wei Beijing Engineering Research Center of Radiographic Techniques and Equipment Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Jinan Laboratory of Applied Nuclear Science Jinan 250131China

Purpose Fast neutrons and gamma-ray imaging detection is an effective way to detect and identify radioactive material in the field of nuclear security.A compact coded aperture imaging(CAI)camera was designed to be sensitive to both gamma and neutron radiation based on plastic scintillators and multi-pixel photon counters(MPPC).Methods MPPCs coupling with the 13×13 pixelated plastic scintillators one-to-one were utilized to reduce the scale of the CAI system while maintaining good positional *** symmetric charge division(SCD)circuit was adopted to reduce the 169 signals output from the MPPC array to *** waveform was collected and processed with four Domino Ring Sampler 4(DRS4)chips and two 16-channel analog-to-digital converter(ADC)*** the pulse shapes of fast neutrons would be broadened after elastic scattering multiple times in the scintillators,the Anger-Logic method was applied to eliminate multiple elastic scattering events so that good pulse shape discrimination(PSD)performance can be *** The imaging and detection ability of the camerawas evaluated using the 241Am-Be(5.9×10^(5) n/s)neutron source and 137Cs(370 MBq)*** camera can be used to detect fast neutrons(0.5–10 MeV)and gammarays(0.2–2.5MeV).Furthermore,it can implement efficient neutron/gamma PSD capabilities in the mixed-field *** figure of merit(FOM)of the camera calculated at 400keVee energy cut is *** A compact MPPC-based CAI camera was designed to detect and discriminate fast neutrons and gamma *** good PSD performance was well suited to distinguish fast neutrons from gamma rays in a dual-particle *** portable design makes it promising for complex monitoring scenarios in nuclear security.

关键词： Coded aperture imaging Fast neutron imaging Gamma imaging n-γdiscrimination

Design of readout electronics based on peak-holding circuit and multiplexer for a fast neutron spectrometer

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Radiation Detection Technology and Methods 2018年第1期2卷 38-48页

作者： Liyang Sun Kai Zhuang Xiaoming Wang Fanjian Zeng Heng An daowu Li Yuxiong Xue Zhiming Zhang Wei Zhou Yingjie Wang Baotong Feng Peilin Wang Xiaohui Li Jiale Cai Teng Tong Fanhui Meng Junguang Zhou huan huang Xuanhou hu Xiubo Qin Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Beijing Engineering Research Center of Radiographic Techniques and Equipment Beijing 100049China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Lanzhou Institute of Physics Chinese Academy of Space TechnologyLanzhou 730000GansuChina

Background Fast neutron detection is meaningful in many research fields such as space environment monitoring.A scintillating fiber array model for fast neutron detection was proposed and developed in *** applications of the model require electronics in small *** To design a dedicated electronic system to readout and process the 384-channel signals from scintillating fiber array,and to use the designed system to fabricate a neutron detector for aerospace *** With the method of nuclear recoil,fast neutron is detected by tracking recoil proton of n–p scatter in scintillating plastic *** the peak-holding circuits and multiplexers,the system size and power consumption were *** The detector fabricated with the designed system,had 34 cm×34 cm×27 cm mechanical size,20.4 kg weight,and 30.05W power *** to traditional waveform sampling electronics,the designed electronics was highly integrated and had a small *** readout electronics also gave a better energy resolution of 39%in neutron detection,while the energy resolution was 43%in previous *** In this study,a highly integrated readout electronic system was designed and *** detector using the system gave good *** designed electronics had potential development in fast neutron detection and other high energy physics detection system.

关键词： Multiplexer Peak-holding circuit Readout electronics Fast neutron detection

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传播学视域下语文阅读对话教学的思考

河南教育学院学报（哲学社会科学版） 2010年第5期29卷 137-139页

作者：姚道武许虎皖西学院中文系六安市田家炳实验中学

新课标把对话理论引入语文阅读教学,表明阅读教学过程就是对话过程。在传播学视域下,阅读对话教学活动就是课堂环境下的传播活动,阅读对话教学过程可视作一个典型的互动传播过程。因此,我们可以从传播过程模式——"奥斯古德与施拉姆的... 详细信息

新课标把对话理论引入语文阅读教学,表明阅读教学过程就是对话过程。在传播学视域下,阅读对话教学活动就是课堂环境下的传播活动,阅读对话教学过程可视作一个典型的互动传播过程。因此,我们可以从传播过程模式——"奥斯古德与施拉姆的循环模式"中得到启发,找到提高阅读对话教学效率的方法。

关键词：传播学循环模式阅读教学对话

一种基于随钻核磁共振时移测井的气层物性参数评价方法

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测井技术 2023年第1期47卷 67-72页

作者：黄导武张国栋罗健胡文亮魏晓晗中海石油(中国)有限公司上海分公司上海200335

水平井气层孔隙度评价一直是海上气田开发的难题之一,通过核磁共振测井理论分析和岩心侵入实验研究,提出了随钻核磁共振时移测井校正方法。研究认为,在一定时间内,目标区储层的钻井液滤液侵入深度可达10 cm以上,通过随钻核磁共振测井和... 详细信息

水平井气层孔隙度评价一直是海上气田开发的难题之一,通过核磁共振测井理论分析和岩心侵入实验研究,提出了随钻核磁共振时移测井校正方法。研究认为,在一定时间内,目标区储层的钻井液滤液侵入深度可达10 cm以上,通过随钻核磁共振测井和时移复测,能够求取随钻实时测量时的流体含氢指数H_(i)。建立H_(i)与随钻核磁共振孔隙度的关系式,可以对全井段核磁共振孔隙度进行校正,得到相对真实的储层孔隙度;也可以通过直接建立实测孔隙度和复测孔隙度之间的关系式,求取全井段孔隙度值。此方法的优点是在兼顾资料录取质量的同时减少作业时间、降低成本,在多口井应用效果良好,具有一定借鉴意义。

关键词：测井评价随钻核磁共振测井钻井液滤液侵入水平井时移测井海上气田

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电脑雕刻机在模型制作实践教学中的应用

中国教育技术装备 2012年第6期 66-68页

作者：郭勇陈玉霞刘盛全涂道伍胡九龙安徽农业大大学合肥230036

随着电脑数控雕刻机的广泛应用和现代化生产的发展,模型设计与制作教学中也开始使用雕刻机,电脑数控雕刻机不仅可以提高模型的加工速度,还可以提高其美观度,并在培养和提高学生实际操作能力和综合素养方面具有优势,可使他们更好地与社... 详细信息

随着电脑数控雕刻机的广泛应用和现代化生产的发展,模型设计与制作教学中也开始使用雕刻机,电脑数控雕刻机不仅可以提高模型的加工速度,还可以提高其美观度,并在培养和提高学生实际操作能力和综合素养方面具有优势,可使他们更好地与社会接轨,快速适应工作岗位。以啄木鸟CP6950型数控雕刻机为例,重点介绍电脑数控雕刻机在模型制作教学中的具体应用。

关键词：电脑雕刻机模型制作实践

北魏八部制政区新探——兼论司州政区的若干问题

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史学月刊 2019年第1期 5-15页

作者：王兴振胡哲复旦大学历史地理研究中心博士研究生上海200433

北魏天兴元年,在"正封畿,制郊甸"的政策下,道武帝首先完成"正封畿"以及"八国"的设置。道武帝最初设置的"八国",延续了拓跋魏立国策略"离散部落""分土定居"的内在逻辑。至天兴二年初建司州,"正封畿,制郊甸"的政策设计方见轮廓。其后,八... 详细信息

北魏天兴元年,在"正封畿,制郊甸"的政策下,道武帝首先完成"正封畿"以及"八国"的设置。道武帝最初设置的"八国",延续了拓跋魏立国策略"离散部落""分土定居"的内在逻辑。至天兴二年初建司州,"正封畿,制郊甸"的政策设计方见轮廓。其后,八部政区与司州政区的变动皆以此为基础拓展、演化。至天赐年间,司州政治地理的一系列变动引发八部突破畿内与畿外的地理界限,形成以"八部五百里"为新界的政治地理格局。在八部政区之内,道武帝因地设置鲜卑官号,位亚牧守,与郡县分民而治。秉承八国制而改置的六部大人,通过进入爵制序列体系,将部制政区定格为与州等级的特别行政区。而道武帝所开创的部制政区与司州相互联结的政治地理进程,亦随之消沉。

关键词：八国六部部落大人司州京畿