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Prototype of single-event effect localization system with CMOS pixel sensor

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Nuclear Science and Techniques 2022年第11期33卷 10-20页

作者： Jun Liu Zhuo Zhou Dong Wang Shi-Qiang Zhou Xiang-Ming Sun Wei-ping Ren Bi-Hui You Chao-Song Gao Le Xiao ping Yang Di Guo Guang-Ming Huang Wei Zhou cheng-Xin Zhao Min Wang PLAC Key Laboratory of Quark&Lepton Physics(MOE)Central China Normal UniversityWuhan 430079China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

The single-event effect(SEE) is a serious threat to electronics in radiation environments. The most important issue in radiation-hardening studies is the localization of the sensitive region in electronics to the SEE. To solve this problem, a prototype based on a complementary metal oxide semiconductor(CMOS) pixel sensor, i.e., TopmetalM, was designed for SEE localization. A beam test was performed on the prototype at the radiation terminal of the Heavy Ion Research Facility in Lanzhou(HIRFL). The results indicated that the inherent deflection angle of the prototype to the beam was 1.7°, and the angular resolution was 0.6°. The prototype localized heavy ions with a position resolution of 3.4 μm.

关键词： Single-event effect Radiation resistant Topmetal-M

Nitrogen Removal Improvement by Adding Peat in Deep Soil of Subsurface Wastewater Infi ltration System

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Journal of Integrative Agriculture 2014年第5期13卷 1113-1120页

作者： CHEN Pei-zhen CUI Jian-yu HU Lin ZHENG Miao-zhuang cheng Shan-ping HUANG Jie-wen MU Kang-guo College of Resources and Environmental Sciences China Agricultural University National Energy R&D Center for Non-Food Biomass of China China Agricultural University

In order to enhance the nitrogen removal, a subsurface wastewater infiltration system （SWIS） was improved by adding peat in deep soil as carbon source for denitrification process. The effects of addition of carbon source in the underpart of the SWIS on nitrogen removal at different influents （with the total nitrogen （TN） concentration 40 and 80 mg L^-1, respectively） were investigated by soil column simulating experiments. When the relatively light pollution influent with 40 mg L^-1 TN was used, the average concentrations of NO3-N and TN in effluents were （4.69±0.235）, （6.18±0.079） mg L^-1, respectively, decreased by 32 and 30.8% than the control; the NO3--N concentration of all effluents was below the maximum contaminant level of 10 mg L^-1; as high as 92.67% of the TN removal efficiency was achieved. When relatively heavy pollution influent with 80 mg LITN was used, the average concentrations of NO3--N and TN in effluents were （10.2±0.265）, （12.5±0.148） mg L^-1 respectively, decreased by 20 and 21.2% than the control; the NO3--N concentration of all effluents met the grade Ⅲ of the national quality standard for ground water of China （GB/T 14848-1993） with the values less than 20 mg L^-1; the TN removal efficiency of 94.1% was achieved. In summary, adding peat in the underpart of the SWIS significantly decreased TN and NO3- -N concentration in effluents and the nitrogen removal efficiency improved significantly.

关键词： peat addition nitrogen removal efficiency denitrification subsurface wastewater infiltration system

一株地黄根腐病致病菌的鉴定及生物学特性研究

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中国中药杂志 2024年第18期49卷 4898-4904页

作者：徐可可刘永红马静婷侯文川董诚明高启国初雷霞杨林林乔璐河南中医药大学药学院河南郑州450046 河南省道地药材生态种植工程技术研究中心河南郑州450046 河南太龙药业股份有限公司河南郑州450000

根腐病作为地黄连作障碍中一种较为严重的土传病害,严重影响地黄药材的品质与产量。该研究对采自河南温县地黄种植间隔根际土壤进行致病真菌的分离、致病性测定、形态学特征及分子生物学特性鉴定确定地黄根腐病主要致病菌,并对致病菌进... 详细信息

根腐病作为地黄连作障碍中一种较为严重的土传病害,严重影响地黄药材的品质与产量。该研究对采自河南温县地黄种植间隔根际土壤进行致病真菌的分离、致病性测定、形态学特征及分子生物学特性鉴定确定地黄根腐病主要致病菌,并对致病菌进行生物学特性研究。结合RPB2与EF1-α基因序列比对及系统发育分析,将其鉴定为镰状镰刀菌Fusarium falciforme,该菌侵染地黄引起根腐病害尚未见报道,是一株的新型致病菌。生物学特性结果表明,该菌株最适培养条件:马铃薯葡萄糖琼脂(PDA)培养基、28℃、全光照。该菌株对pH不敏感;以蔗糖、麦芽糖和葡萄糖为碳源时生长较快,以硝酸钠、硝酸钾、硫酸铵、硝酸铵、尿素为氮源时,菌丝生长速率均有所下降,但在菌丝浓密程度上均大于察氏阴性对照组。其中,以硝酸钠为氮源菌丝生长最快。菌丝和孢子的致死温度分别为69、61℃。对该病菌的分离鉴定及生物学特性研究,为地黄根腐病害有效防控提供了重要依据。

关键词：地黄连作障碍根腐病病原菌鉴定生物学特性

Hypereutectic Al-Si Matrix Composites Prepared by In Situ Fe_(2)O_(3)/Al System

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Journal of Wuhan University of Technology(Materials Science) 2021年第5期36卷 636-643页

作者： WANG Yifei ZHANG jing SUN Chichi cheng Zhaoxia PANG Zhouyi WANG Ling CHEN Hongmei LIU Ning School of Metallurgy and Materials Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600China Zhangjiagang Industrial Technology Research Institute Jiangsu University of Science and TechnologyZhangjiagang 215600China Yingkou Institute of Technology Yingkou 115014China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Al_(2)O_(3) particles reinforced hypereutectic Al-Si composites were prepared by in situ Fe_(2)O_(3)/Al reaction *** thermodynamic analysis and microstructure evolution were investigated by differential scanning calorimetry,optical microscope,scanning electronic microscopy and transmission electron *** show that the reaction between Fe_(2)O_(3) and Al is spontaneous which can be separated into two steps at different *** in situ Al_(2)O_(3) particles in nano size distribute on the Al matrix accompanied with long needle-shapedβFe-rich intermetallic *** different content of Mn addition,βphase can be modified toα-Al15(Mn,Fe)3Si2 andδ-Al4(Fe,Mn)*** tensile strength and elongation results at room temperature and 300℃reveal that the optimal Fe-rich intermetallic phase is finer Chinese-script and polyhedralαphase with a Mn/Fe mass ratio 0.5 for the *** in situ Al_(2)O_(3) particles andα-Fe phases contribute to the properties improvement of the composites。

关键词： hypereutectic Al-Si alloys particles reinforced composites Al_(2)O_(3)particles Fe-rich intermetallic compounds

Effects of the flow rate of hydrogen on the growth of graphene

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International Journal of Minerals,Metallurgy and Materials 2015年第1期22卷 102-110页

作者： Yong-gui Shi Yue Hao Dong Wang Jin-cheng Zhang Peng Zhang Xue-fang Shi Dang Han Zheng Chai jing-dong Yan School of Microelectronics Xidian University State Key Discipline Laboratory of Wide Band-Gap Semiconductors and Devices Xidian University School of Technical Physics Xidian University

Graphene samples with different morphologies were fabricated on the inside of copper enclosures by low pressure chemical vapor deposition and tuning the flow rate of hydrogen. It is found that the flow rate of hydrogen greatly influences the growth of graphene. Ther-modynamic analysis indicates that a higher flow rate of hydrogen is favorable to the formation of good quality graphene with regular mor-phology. However, the mass-transfer process of methane dominates the growth driving force. At very low pressure, mass-transfer proceeds by Knudsen diffusion, and the mass-transfer flux of methane decreases as the flow rate of hydrogen increases, leading to a decrease in the growth driving force. At a higher pressure, mass-transfer proceeds by Fick＇s diffusion, and the mass-transfer flux of methane is dominated by the gas velocity, whose variation determines the growth driving force variation of graphene.

关键词： graphene crystal growth morphology diffusion mass transfer chemical vapor deposition

Consensus and Trajectory Planning with Input Constraints for Multi-agent Systems

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自动化学报 2012年第7期38卷 1074-1082页

作者： YAN jing GUAN Xin-ping LUO Xiao-Yuan YANG Xian Institute of Electrical Engineering Yanshan University Qin- huangdao 066004 P. R. China School of Electronic and Electric Engineering Shanghai Jiao Tong University Shanghai 20024

This paper presents a distributed receding horizon approach for multi-agent systems. First, the consensus problem with input constraints is considered. Second, the trajectory planning of multi-agent systems (MASs) evolving in environment with obstacles is studied, in which the information of obstacles can be obtained online once the obstacles are sensed by the agents within a limited sensing range. Based on receding horizon approach, a distributed control algorithm is developed to solve the two problems simultaneously. The algorithm can be given by solving the optimal control problem, in which the cost function is coupled with the dynamics of each interacting agent. The exchanged information between agents is the previous optimal control states of their neighbors at each update step. The system stability can be guaranteed with a terminal-state penalty in the cost function and a terminal-state region in the optimal control problem. Simulation studies are provided to verify the effectiveness of the proposed approach.

关键词：多智能体系统轨迹规划输入最优控制问题检测范围控制算法成本函数控制状态

Crystal Structure of 7,9-Diphenyl-8 H- cyclopentacenaphthylen 8-one(acecyclone)

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Chinese Journal of Structural Chemistry 2000年第3期19卷 174-176页

作者： SHI Bao-Chuan GU Wei-jing ZHU Zhi-cheng ZAO Han-Hua DU Zuo-Dong CHEN Jian-Hua Department of Chemistry Nanjing Normal UniversityNanjing210097 Department of Chemistry Shandong UniversityJinan250100

In the title compound, C 27 H 16 O, M r =356.42, orthorhombic, Pbcn, a=22.549(6), b=10.738(4), c=7.316(5), V=1771(2) 3, Z=4, D calc =1 336g/cm 3, F(000)=744, μ (Mo Kα )=0.08mm -1 and final R=0.041, R w =0.045 for 1009 reflections( I≥3.00σ(I )). The molecular structure of 7,9 diphenyl 8H cyclopentacenaphthylen 8 one(acecyclone) is symmetrical and each atom except two benzene rings lies approximately in the same plane.

关键词： crystal structure acecyclone fused ring compound

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高含硫天然气净化装置清洗体系的研制与应用

精细石油化工进展 2024年第1期25卷 23-27页

作者：刘长松杜永慧裴欣刘晶王平母建民中国石化中原油田普光分公司四川达州635002 中国石化中原油田分公司石油工程技术研究院河南濮阳457001

高含硫天然气净化装置在检修前需清洗因腐蚀产生的FeS以及H_(2)S、SO_(2)等有毒有害气体。针对现有清洗剂清洗效果有限、废液中含有锰铬等重金属离子以及成本较高等问题,以FeS转化率与H_(2)S吸收率为评价指标,研究建立了以氧化剂F、过... 详细信息

高含硫天然气净化装置在检修前需清洗因腐蚀产生的FeS以及H_(2)S、SO_(2)等有毒有害气体。针对现有清洗剂清洗效果有限、废液中含有锰铬等重金属离子以及成本较高等问题,以FeS转化率与H_(2)S吸收率为评价指标,研究建立了以氧化剂F、过硫酸钠、乙二胺四甲叉膦酸、Na_(2)SO_(4)与分散助剂D为主要成分的高含硫天然气净化装置化学清洗体系。该清洗体系的FeS转化率为85.86%,H_(2)S吸收率为95.4%。现场应用表明,该清洗体系清洗效果良好,废液中总磷含量仅0.24 mg/L,无锰铬等重金属离子,且成本节约40%以上。

关键词：高含硫天然气净化装置 FeS H_(2)S 化学清洗

Crystal Boundary of Chemical Vapor Deposited Diamond Films

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Journal of Iron and Steel Research International 2012年第S2期19卷 817-820页

作者： HUANG Yuan-sheng LUO cheng-ping QIU Wan-qi Department of Materials Technology Jiangmen Polytechnic College of Mechanical Engineering South China University of Technology

CVD diamond films were synthesized by the chemical vapor deposition *** crystal boundary was investigated using transmission electron microscopy and scan electron *** second grains facilitate the more compact film *** micro-holes are seen among diamond grains in the films but there are micro-holes in the interface of film/*** second grain and the primary grain would keep the twin relationship of<110/70.5°.A lot of micro-twins are observed in fivefold twin grains but there is a zone of non twins which is like a strip along the fivefold twin *** microtwins keep the twin relationship of<110/70.5° with the fivefold twin *** width and length of microtwins are about 3 nm and 32 nm,respectively.

关键词： diamond film chemical vapor deposition(CVD) transmission electron microscopy(TEM