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Transactions of Nonferrous Metals Society of China 2024年第10期34卷 3344-3357页

作者： Bin-bin WANG Yi-ming FENG Xin LUO Qun HUANG zi-xing HOU Ya-qin WU peng-yu WANG Yu-yang QI Qing-fei MENG wei-feng wei Liang-jun ZHOU State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Vital Material Co. Ltd.Guangzhou 510623China The 48th Research Institute of China Electronics Technology Group Corporation Changsha 410111China Wuhan Zhongyuan Changjiang Technology Development Co. Ltd.Wuhan 430090China

Sc and Zn were introduced into O3-NaMn_(0.5)Ni_(0.5)O_(2)(NaMN)using the combination of solution combustion and solid-state *** effect of Sc and Zn dual-substitution on Na^(+) diffusion dynamics and structural stability of NaMN was *** physicochemical characterizations suggest that the introduction of Sc and Zn broaden Na^(+) diffusion channels and weaken the Na—O bonds,thereby facilitating the diffusion of sodium *** indicate that the Sc and Zn dual-substitution decreases the diffusion barrier of Na-ions and improves the conductivity of the *** dual-substituted NaMn_(0.5)Ni_(0.4)Sc_(0.04)Zn_(0.04)O_(2)(Na MNSZ44)cathode delivers impressive cycle stability with capacity retention of 71.2%after 200 cycles at 1C and 54.8%after 400 cycles at ***,the full cell paired with hard carbon anode exhibits a remarkable long-term cycling stability,showing capacity retention of 64.1%after 250 cycles at *** results demonstrate that Sc and Zn dual-substitution is an effective strategy to improve the Na^(+) diffusion dynamics and structural stability of NaMN.

关键词： layered oxide cathode Sc and Zn dual-substitution structural stability Na^(+)diffusion dynamics

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三级式电机电流/转速分时段闭环起动控制

电机与控制学报 2018年第10期22卷 58-66页

作者：孟涛刘卫国焦宁飞彭纪昌姜宇西北工业大学自动化学院西安710129 陕西航空电气有限责任公司西安710065

针对三级式同步电机起动过程中主发电机与励磁机电磁耦合严重,在现有起动控制策略下存在转矩冲击、动态起动困难的问题,通过分析转速环和电流环的调节特点,结合航空发动机负载大惯量特性,提出一种通过电流/转速分时段独立闭环调节主发... 详细信息

针对三级式同步电机起动过程中主发电机与励磁机电磁耦合严重,在现有起动控制策略下存在转矩冲击、动态起动困难的问题,通过分析转速环和电流环的调节特点,结合航空发动机负载大惯量特性,提出一种通过电流/转速分时段独立闭环调节主发电机电压矢量幅值的起动控制方法。在此基础之上,采用一种改进型的二阶线性自抗扰控制器对电流环进行优化改进。实验结果表明,所提出的控制方法可以有效提高电机在电动状态下的运行稳定性,减小了起动过程中的转矩冲击,具有较快的响应速度,适用于电机的动态起动。

关键词：三级式同步电机转矩冲击动态起动分时段独立闭环自抗扰控制

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一种超低相位噪声频率合成源方案设计

自动化学报 2017年第12期43卷 2225-2231页

作者：王李飞张宁彭子健薛沛祥李维亮电子测试技术重点实验室青岛266555 中国电子科技集团公司第四十一研究所青岛266555

频率合成源是射频发生和频谱分析中最重要的组成之一,评价合成源性能指标的是输出信号的相位噪声、杂散、频率分辨率和频率切换时间.本文通过分析传统锁相环原理,提出一种通用的超低相位噪声合成源设计方案(带宽100 MHz以内).在锁相环... 详细信息

频率合成源是射频发生和频谱分析中最重要的组成之一,评价合成源性能指标的是输出信号的相位噪声、杂散、频率分辨率和频率切换时间.本文通过分析传统锁相环原理,提出一种通用的超低相位噪声合成源设计方案(带宽100 MHz以内).在锁相环基础上,通过引入直接数字合成(Direct digital synthesizer,DDS)混频鉴相技术,使得到的射频信号理论值达到0.1 m Hz的频率分辨率,同时将带内相位噪声指标优化17 d B以上.新方案同时兼顾了杂散和频率切换时间指标,保障合成源的输出信号稳定可靠,使其在自动测试领域拥有广阔的应用前景.

关键词：频率合成源锁相环极高分辨率超低相位噪声

基于改进BCC算法的含微电网的配电网网架规划

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电力系统保护与控制 2012年第10期40卷 12-18页

作者：凡鹏飞张粒子熊浩清张洪王大江华北电力大学电气工程学院北京102206 河南省电力公司河南郑州450052 华北电力大学现代电力研究院北京102206

在分析MG发用电特性对配电网网损和用户供电可靠性的影响效应的基础上,建立了计及上述影响效应的含MG的配电网网架柔性规划模型。尝试将细菌群体趋药性(BCC)算法应用于模型求解;为解决布尔困境问题,提出基于sigmoid函数的策略;针对迭代... 详细信息

在分析MG发用电特性对配电网网损和用户供电可靠性的影响效应的基础上,建立了计及上述影响效应的含MG的配电网网架柔性规划模型。尝试将细菌群体趋药性(BCC)算法应用于模型求解;为解决布尔困境问题,提出基于sigmoid函数的策略;针对迭代过程中产生的不满足辐射条件的不可行解,提出基于操纵子理论的判断修复策略,实现对孤岛、孤链和环网的一次性修复。最后,IEEE54节点算例验证了模型的适用性以及改进BCC算法应用于含MG配电网网架规划的有效性和可行性。

关键词：配电网规划微电网细菌趋药性算法改进策略

Primary yields of protons measured using CR-39 in laser-induceddeuteron–deuteron fusion reactions

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Nuclear Science and Techniques 2020年第6期31卷 90-98页

作者： Yue Zhang Long-Xiang Liu Hong-wei Wang Yu-Gang Ma Bai-fei Shen Guo-Qiang Zhang Mei-Rong Huang Aldo Bonasera Wen-peng Wang Jian-Cai Xu Shun Li Gong-Tao Fan Xi-Guang Cao Yong Yu Jian-Jun He Chang-Bo Fu Suyalatu Zhang Xin-Rong Hu Xin-Xiang Li zi-Rui Hao Jun-Wen Wang Han Xue Hai-Juan Fu Shanghai Institute of Applied Physics CASShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Shanghai Advanced Research Institute CASShanghai 201210China Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsCASShanghai 201800China Department of Physics Shanghai Normal UniversityShanghai 200234China CAS Center for Excellence in Ultra-Intense Laser Science Shanghai 201800China College of Physics and Electronics Information Inner Mongolia University for NationalitiesTongliao 028000China Cyclotron Institute Texas A&M UniversityCollege StationTX 77843USA Laboratori Nazionali del Sud INFNVia Santa Sofia6295123 CataniaItaly Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China ShanghaiTech University Shanghai 201210China Shanghai University Shanghai 200444China

Investigating deuteron–deuteron(DD)fusion reactions in a plasma environment similar to the early stages of the Big Bang is an important topic in nuclear *** this study,we experimentally investigated such reactions,using eight laser beams with the third harmonic impacting on a deuterated polyethylene target at the ShenGuang-II Upgrade laser *** work focused on the application of range-filter(RF)spectrometers,assembled from a 70 lm aluminum filter and two CR-39 nuclear track detectors,to measure the yields of primary *** on the track diameter calibration results of 3 MeV protons used to diagnose the tracks on the RF spectrometers,an approximate primary DD-proton yield of(8.5±1.7)×10^6 was obtained,consistent with the yields from similar laser facilities *** indicates that the RF spectrometer is an effective way to measure primary ***,due to the low yields of D^3He-protons and its small track diameter,CR-39 detectors were unable to distinguish it from the background *** other accurate detectors may help to measure these rare events.

关键词： Deuteron-deuteron fusion CR-39 Rangefilter spectrometer DD-proton

A large-scale fatal outbreak of Pasteurella multocida among wild rodents in southwestern China

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Journal of Biosafety and Biosecurity 2020年第2期2卷 91-98页

作者： Chun-Hong Du Yong Huang Jia-Fu jiang zi-Hou Gao Na Jia Shan Yang Chao-Nian Chen Shun-Gao Ma Yu-Ying Liang Bao-Gui jiang wei-Hong Sang peng Wang Yun Liang Yun-Zhi Zhang Ji-Hua Zhou Shui-Ping Chen Frans Jongejan Zhi-Zhong Song Yi-Gang Tong Wu-Chun Cao State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyBeijingPR China Yunnan Institute for Endemic Diseases Control and Prevention Dali YunnanPR China Puer Center for Disease Control and Prevention PuerYunnanPR China Simao Prefecture Center for Disease Control and Prevention PuerYunnanPR China DaLi Bai Autonomous Prefecture People’Hospital YunnanPR China Fifth Medical Center of PLA General Hospital BeijingPR China Utrecht Centre for Tick-borne Diseases(UCTD) Faculty of Veterinary MedicineUtrecht UniversityYalelaan 13584 CL UtrechtThe Netherlands College of Life Science and Technology Beijing University of Chemical Technology.BeijingPR China

Background:Pasteurella multocida is an important and old zoonotic pathogen worldwide which has an impressive host spectrum including numerous domestic and wild animals as well as birds,causing specific diseases or outbreak with great economic *** has never been reported that *** can cause an epidemic in wild *** June 5–17,2016,more than 1000 rodent deaths of an unknown cause quickly spread in the PuEr City,Yunnan province,southwestern ***:The rodents in affected areas and outside of the epidemic areas were collected and screened for possible known pathogens including Yersinia pestis,rabies virus and hantavirus as well as other *** possible bacterial pathogens were isolated both by culture medium and by mouse inoculation in *** isolates were identified by the Vitek GNI card and PCR assays for 16S rRNA *** pathogen strains were selected for whole genome sequencing ***:A total of 123 rodents were collected from 25 sample sites at affected area,among of which,all 119 dead rodents were negative for the pathogen under consideration except ***,and all four live rodents were negative for *** addition,480 rodents collected from other 23 counties outside of the epidemic area in Yunnan were negative for with ***.A total of 14 strains of ***(six directly isolated from the field rodents and eight from the experimental mice that were injected with the organ substrates from the dead rodents)belonged to serogroup A and serogroup F represented by 9 N and 20 N were identified in these epidemic *** genome sequencing revealed that the serogroup F strain shared 99%similarity to *** Pm70 from chicken,but contained a 50 k bp insertion *** serogroup A strain shared 95%similarity to *** FDAARGOS_385 from a human patient,but contained four large structural *** abnormalities were identified in the livers,lungs,hearts and brains of the ino

关键词： Pasteurella multocida Serotypes A Serotypes F Rodents Outbreak China

基于深度学习与混沌特征融合的滚动轴承故障诊断

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控制理论与应用 2022年第1期39卷 109-116页

作者：金江涛许子非李春缪维跑肖俊青孙康上海理工大学能源与动力工程学院上海200093 上海市动力工程多项流动与传热重点实验室上海200093

本文针对现有滚动轴承智能故障诊断方法在面向大噪声背景下鲁棒性能差的问题.基于混沌理论,提出采用相空间重构方法还原并丰富轴承振动的动力学特性,通过卷积神经网络(CNN)提取混沌序列中的高级抽象特征,又考虑故障信号具有长程相关性,... 详细信息

本文针对现有滚动轴承智能故障诊断方法在面向大噪声背景下鲁棒性能差的问题.基于混沌理论,提出采用相空间重构方法还原并丰富轴承振动的动力学特性,通过卷积神经网络(CNN)提取混沌序列中的高级抽象特征,又考虑故障信号具有长程相关性,将低维抽象故障特征引入长短期记忆网络(LSTM),以灰狼算法优化的支持向量机(OSVM)作为分类器,提出CCNN (Chaotic CNN)–LSTM–OSVM智能故障诊断方法.试验结果表明,在处理信噪比为-6 dB信号时,该方法仍具有89.96%的准确率,相比以Softmax作为分类器的CNN–LSTM和CCNN–LSTM方法分别高出15.36%和5.21%,且在收敛速度方面亦有较大优势.

关键词：卷积神经网络长短期记忆网络支持向量机混沌特征融合轴承故障诊断

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Distribution characteristics and environmental risk assessment following metal(loid)s pollution incidents at Southwest China mining site

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Transactions of Nonferrous Metals Society of China 2022年第12期32卷 4062-4075页

作者： Zhen-xing WANG Yun-jun YU Tian-tian YE jiang-chi fei Xin-yu SONG Jian-wei peng Yao-yu ZHOU Hong-hua WU South China Institute of Environmental Sciences Ministry of Ecology and EnvironmentGuangzhou 510530China State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control Guangzhou 510655China College of Resources and Environment Hunan Agricultural UniversityChangsha 410128China Guangxi Hezhou Dongrong Industrial Investment Group Co. Ltd.Hezhou 542899China

Limited information is available on long-term effects of metal(loid)s pollution incidents. Here, we analyze the distribution characteristics and quantification of elements in the Southwest China Keda mining site, which is one of the most populated sites and enables human health and ecological risk assessments of elemental pollution. The results on modified degree of contamination indicated that the soil and sediment were highly contaminated near Dahu *** health risk of children was almost 2.5 times that of adults in surface water, and 7.1 times in soil, ***, Tl and As were the main health risk contributors in surface water and soil, respectively, and As posed the highest ecological risk both in soil and sediment. These results indicated the potential impact of toxic metal(loid)s on the health of residents and environment. Hence, more scientific attention and proper management need to be paid to this environmental challenge in the future.

关键词： thallium arsenic mining site ecological risk health risk

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芳纶纤维塑料筋混凝土的粘结性能试验研究

四川建筑科学研究 2007年第3期33卷 95-98页

作者：张鹏江世永熊晔飞渭后勤工程学院军事建筑工程系重庆400041

通过27个拉拔试件和16个梁式试件的试验结果,分析了芳纶纤维塑料筋的粘结锚固性能和破坏模式,较为系统地探讨了混凝土强度、埋长、直径、箍筋配置等因素对粘结强度的影响。

关键词：芳纶纤维塑料筋混凝土拉拔试验梁式试验粘结性能

Site testing campaign for the Large Optical/infrared Telescope of China:overview

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Research in Astronomy and Astrophysics 2020年第6期20卷 81-95页

作者： Lu Feng Jin-Xin Hao zi-Huang Cao Jin-Min Bai Ji Yang Xu Zhou Yong-Qiang Yao Jin-Liang Hou Yong-Heng Zhao Yu Liu Teng-fei Song Li-Yong Liu Jia Yin Hua-Lin Chen Chong Pei Ali Esamdin Lu Ma Chun-Hai Bai peng wei Jing Xu Guang-Xin Pu Guo-Jie Feng Xuan Zhang Liang Ming Abudusaimaitijiang Yisikandee Jian-Rong Shi Jian Li Yuan Tian Zheng Wang Xia Wang Xiao-Jun jiang Jian-Feng Wang Jian-Feng Tian Yan-Jie Xue Jian-Sheng Chen Jing-Yao Hu Zhi-Xia Shen Yun-Ying jiang National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing 210042China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210033China University of Chinese Academy of Sciences Beijing 100049China

The Large Optical/infrared Telescope(LOT)is a ground-based 12 m diameter optical/infrared telescope which is proposed to be built in the western part of China in the next *** on satellite remote sensing data,along with geographical,logistical and political considerations,three candidate sites were chosen for ground-based astronomical performance *** sites include:Ali in Tibet,Daocheng in Sichuan and Muztagh-ata in *** until now,all three sites have continuously collected data for two *** this paper,we will introduce this site testing campaign,and present its monitoring results obtained during the period between March 2017 and March 2019.

关键词： techniques telescope-site testing