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Chinese Physics C 2021年第10期45卷 77-83页

作者： hang Yang Qichun Feng Yanyv Ren Jingbo Zhang Lei huo School of Physics Harbin Institute of TechnologyHarbin 150001China

Using the string melting version of a multiphase transport(AMPT)model,we analyze the transverse momentum dependence of the HBT radius R_(s) and the single-pion angle distribution on the transverse plane in central Au+Au collisions at■,and 200 ***,a numerical connection between these two phenomena is established with a series of *** can estimate the single-pion angle distribution on the transverse plane from HBT analysis.

关键词： HBT radii transverse momentum dependence space-momentum angle distribution AMPT

形貌可控的尖晶石型LiNi_(0.5)Mn_(1.5)O_4的合成与性能

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电池工业 2014年第2期19卷 71-75页

作者：陈强胡航赵瑞瑞朱继涛蒋建辉陈红雨华南师范大学化学与环境学院广东广州510006 深圳慧通天下科技股份有限公司广东深圳518106 广东省产品质量监督检验研究院广东广州510308

采用溶胶-凝胶法制备了5V正极材料LiNi0.5Mn1.5O4。将混合盐溶液以不同速度加入草酸溶液中,对制得的LiNi0.5Mn1.5O4材料的结构、形貌和电化学性能会产生显著的影响。结果表明:将盐溶液以0.17mL/s的速度加入到草酸中,预烧温度为450℃,焙... 详细信息

采用溶胶-凝胶法制备了5V正极材料LiNi0.5Mn1.5O4。将混合盐溶液以不同速度加入草酸溶液中,对制得的LiNi0.5Mn1.5O4材料的结构、形貌和电化学性能会产生显著的影响。结果表明:将盐溶液以0.17mL/s的速度加入到草酸中,预烧温度为450℃,焙烧4h,后900℃焙烧6h制得的样品为粒径均匀的多面体,1C充放电初始容量达到135mAh/g,55次循环后的放电比容量保持率为96.26%。

关键词：锂离子电池 5 V正极材料 LiNi0.5 Mn1.5O4 溶胶-凝胶法

Single-particle space-momentum angle distribution effect on two-pion HBT correlation in high-energy heavy-ion collisions

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Chinese Physics C 2020年第5期44卷 78-86页

作者： hang Yang Qichun Feng Yanyv Ren Jingbo Zhang Lei huo School of Physics Harbin Institute of TechnologyHarbin 150001China

We analyze the transverse momentum dependence of HBT radii in relativistic heavy-ion collisions using several source *** indicate that the single-particle space-momentum angle distribution plays an important role in the transverse momentum dependence of HBT *** a cylinder source,we use several formulas to describe the transverse momentum dependence of HBT radii and the single-particle space-momentum angle *** also make a numerical connection between them in the transverse plane.

关键词： HBT radii transverse momentum dependence space-momentum angle distribution

黄芪多糖对肺气虚型变应性鼻炎大鼠TSLP、OX40L mRNA表达的影响

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广州中医药大学学报 2020年第9期37卷 1747-1752页

作者：许江涛张丽娟霍宇航程娟娟陈钰婷李得堂广州中医药大学广东广州510405 广州中医药大学附属中山医院广东中山528400 广州中医药大学第一附属医院广东广州510405

【目的】探讨黄芪多糖对肺气虚型变应性鼻炎大鼠鼻黏膜组织胸腺基质淋巴细胞生成素(TSLP)、OX40配体(OX40L)mRNA表达的影响。【方法】将40只SD大鼠分为正常组、模型组、氯雷他定组、黄芪多糖组,每组10只。除正常组外,其余3组均采用烟熏... 详细信息

【目的】探讨黄芪多糖对肺气虚型变应性鼻炎大鼠鼻黏膜组织胸腺基质淋巴细胞生成素(TSLP)、OX40配体(OX40L)mRNA表达的影响。【方法】将40只SD大鼠分为正常组、模型组、氯雷他定组、黄芪多糖组,每组10只。除正常组外,其余3组均采用烟熏法结合卵清蛋白致敏法建立肺气虚型变应性鼻炎大鼠模型。在局部激发阶段,氯雷他定组给予氯雷他定灌胃,黄芪多糖组给予黄芪多糖灌胃,正常组和模型组灌胃等量生理盐水。给药结束后,观察肺气虚型证候表现,对变应性鼻炎行为学进行评分,计算大鼠脾脏指数,采用苏木素-伊红(HE)和天狼猩红染色观察鼻黏膜组织病理改变,采用酶联免疫吸附分析(ELISA)检测血清中白细胞介素4(IL-4)、干扰素γ(IFN-γ)水平,采用实时定量逆转录聚合酶链反应(RT-qPCR)法检测鼻黏膜组织TSLP、OX40L m RNA表达的水平。【结果】与正常组比较,模型组大鼠肺气虚证候表现明显,鼻炎症状评分升高,脾脏指数升高,鼻黏膜组织重塑病理表现明显,血清中IL-4水平升高、IFN-γ水平降低,鼻黏膜TSLP、OX40L mRNA表达量显著升高(均P 0.05)。【结论】黄芪多糖可有效改善肺气虚型变应性鼻炎大鼠鼻黏膜炎性症状,其作用机制与下调鼻黏膜组织TSLP、OX40L mRNA表达有关。

关键词：黄芪多糖变应性鼻炎胸腺基质淋巴细胞生成素 OX40配体白细胞介素4 干扰素γ 大鼠

^(235)U enrichment detection system for nuclear fuel rod based on compact D–D neutron generator

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Science China(Technological Sciences) 2021年第9期64卷 1940-1946页

作者： WU Kang LIU XingYu YANG Xu LIU ChangQi huo DongYing BAI XiaoHou HAN Chao JIANG QiaoYue Zhang hang PENG JinQiu Zhang Yu WANG JunRun YAO ZeEn WEI Zheng School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China Engineering Research Center for Neutron Application Ministry of EducationLanzhou UniversityLanzhou 730000China

A reliable ^(235)U enrichment uniformity detection system based on a compact D–D neutron generator is developed to detect the ^(235)U enrichment uniformity of different fuel elements in the same nuclear fuel rod. The high-yield compact D–D neutron generator provides 2.45 MeV D–D neutrons, decelerated by a moderator to thermal neutrons or epithermal neutrons, thereby inducing ^(235)U fission to produce highly excited state fission fragments that undergo de-excitation via γ-ray emission. The system detects the ^(235)U enrichment uniformity of a nuclear fuel rod by measuring γ-rays and establishing a relationship between the γ-ray count rate and ^(235)U enrichment in nuclear fuel. The proposed system yields a confidence probability of 99.99% for a relative ^(235)U enrichment deviation of 10% and a neutron yield of 5 × 10^(8) n/s, and the detection accuracy increases with increasing neutron yield. Furthermore, the developed system can satisfy quality control requirements for nuclear fuel production to promote the safe development of nuclear power.

关键词： compact D–D neutron generator ^(235)U enrichment detection BGO crystal

Recent advances in kinetic and thermodynamic regulation of magnesium hydride for hydrogen storage

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Rare Metals 2023年第9期42卷 2906-2927页

作者： hang Yang Zhao Ding Yu-Ting Li Shao-Yuan Li Ping-Keng Wu Quan-Hui Hou Yang Zheng Biao Gao Kai-Fu huo Wen-Jia Du Leon L.Shaw The State Key Laboratory of Refractories and Metallurgy Institute of Advanced Materials and NanotechnologyWuhan University of Science and TechnologyWuhan430081China College of Materials Science and Engineering National Engineering Research Center for Magnesium AlloysChongqing UniversityChongqing400044China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming650093China

Developing safer and more efficient hydrogen storage technology is a pivotal step to realizing the hydrogen economy. Owing to the lightweight, high hydrogen storage density and abundant reserves, MgH_(2) has been widely studied as one of the most promising solidstate hydrogen storage materials. However, defects such as stable thermodynamics, sluggish kinetics and rapid capacity decay have seriously hindered its practical application. This article reviews recent advances in catalyst doping and nanostructures for improved kinetic performance of MgH_(2)/Mg systems for hydrogen release/absorption, the tuning of their thermodynamic stability properties by alloying and reactant destabilization, and the dual thermodynamic and kinetic optimization of the MgH_(2)/Mg system achieved by nanoconfinement with in situ catalysis and ball milling with in situ aerosol spraying, aiming to open new perspectives for the scale-up of MgH_(2) for hydrogen storage applications.

关键词： Magnesium hydride Thermodynamics Kinetics Hydrogen storage

干涉型光纤水听器PGC数字式零差解调系统的开发

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仪器仪表学报 2006年第Z2期27卷 1457-1459页

作者：霍洪丽杭利军河北工程大学水电学院邯郸056021 北京工业大学机电学院北京100022

相位生成载波的零差解调技术被频繁用于干涉型光纤水听器的信号解调。然而由于模拟电路的电子元件间存在阻抗不匹配、过载等问题,因此解调系统不能达到最佳性能。为了克服上述问题,在LabVIEW平台下开发了PGC数字零差解调系统,并进行计... 详细信息

相位生成载波的零差解调技术被频繁用于干涉型光纤水听器的信号解调。然而由于模拟电路的电子元件间存在阻抗不匹配、过载等问题,因此解调系统不能达到最佳性能。为了克服上述问题,在LabVIEW平台下开发了PGC数字零差解调系统,并进行计算机仿真。结果表明,PGC数字零差解调系统具有很好的稳定性和实际可行性。

关键词：光纤水听器相位生成载波(PGC) 零差解调LabVIEW

Indirect neutron radiography experiment on dummy nuclear fuel rods for pressurized water reactors at CMRR

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Nuclear Science and Techniques 2024年第11期35卷 13-27页

作者： Yong Sun Qi-Biao Wang Peng-Cheng Li Ming Xia Bin Liu He-Yong huo Wei Yin Yang Wu Sheng Wang Chao Cao Xin Yang Run-Dong Li hang Li Bin Tang Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621000China School of Physics and Electronic Engineering Sichan University of Science and EngineeringZigong 643000China

Nuclear energy is a vital source of clean energy that will continue to play an essential role in global energy production for future *** fuel rods are core components of nuclear power plants,and their safe utilization is *** to its inherent high radioactivity,indirect neutron radiography(INR)is currently the only viable technology for irradiated nuclear fuel rods in the field of energy *** study explores the experimental technique of indirect neutron computed tomography(INCT)for radioactive *** project includes the development of indium and dysprosium conversion screens of different thicknesses and conducts resolution tests to assess their ***,pressurized water reactor(PWR)dummy nuclear fuel rods have been fabricated by self-developing substitute materials for cores and outsourcing of mechanical *** research on the INR is performed using the developed dummy nuclear fuel *** sparse reconstruction technique is used to reconstruct the INR results of 120 pairs of dummy nuclear fuel rods at different angles,achieving a resolution of 0.8 mm for defect detection using INCT.

关键词： Conversion screen Dysprosium Indirect neutron computed tomography Dummy nuclear fuel rods

装置极化效率对极化中子成像质量的影响及修正分析

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物理学报 2013年第16期62卷 63-69页

作者：曹超李航霍合勇唐科孙勇中国工程物理研究院核物理与化学研究所绵阳621900

极化中子照相技术通过分析极化中子束的自旋相移对样品磁场进行成像,自旋极化/分析装置是照相系统的主要组成部分.引入中子自旋极化/分析装置的极化效率参数,从中子极化矢量与磁场相互作用机理出发,重新推导探测中子强度与磁场分布的定... 详细信息

极化中子照相技术通过分析极化中子束的自旋相移对样品磁场进行成像,自旋极化/分析装置是照相系统的主要组成部分.引入中子自旋极化/分析装置的极化效率参数,从中子极化矢量与磁场相互作用机理出发,重新推导探测中子强度与磁场分布的定量关系,利用谱仪模拟软件VITESS,选取bender型超镜极化器和3He自旋过滤器作为极化/分析装置,对量化修正式进行验证,并综合装置极化效率、单色器能量分辨精度和bender型极化器的几何结构等参数,初步分析极化中子照相技术的磁场定量检测能力,相关结果可为极化中子照相的实验数据处理技术研究及装置设计提供参考.

关键词：极化效率中子照相磁场成像

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基于蚁群信息素辅助的Q学习路径规划算法

控制与决策 2023年第12期38卷 3345-3353页

作者：田晓航霍鑫周典乐赵辉哈尔滨工业大学控制与仿真中心哈尔滨150080 国防科技大学前沿交叉学科学院长沙410073

当Q学习应用于路径规划问题时,由于动作选择的随机性,以及Q表更新幅度的有限性,智能体会反复探索次优状态和路径,导致算法收敛速度减缓.针对该问题,引入蚁群算法的信息素机制,提出一种寻优范围优化方法,减少智能体的无效探索次数.此外,... 详细信息

当Q学习应用于路径规划问题时,由于动作选择的随机性,以及Q表更新幅度的有限性,智能体会反复探索次优状态和路径,导致算法收敛速度减缓.针对该问题,引入蚁群算法的信息素机制,提出一种寻优范围优化方法,减少智能体的无效探索次数.此外,为提升算法初期迭代的目的性,结合当前栅格与终点位置关系的特点以及智能体动作选择的特性,设计Q表的初始化方法;为使算法在运行的前中后期有合适的探索概率,结合信息素浓度,设计动态调整探索因子的方法.最后,在不同规格不同特点的多种环境中,通过仿真实验验证所提出算法的有效性和可行性.

关键词： Q学习路径规划 Q表初始化探索概率蚁群算法信息素