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Co/Co_(7)Fe_(3)heterostructures with controllable alloying degree on carbon spheres as bifunctional electrocatalyst forrechargeable zinc-air batteries

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 476-487页

作者： Junkang Chen Yongyue Zhuang Yanxin Qiao Yu Zhang Aihua Yuan hu Zhou School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Exploring efficient and nonprecious metal electrocatalysts of oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is crucial for developing rechargeable zinc-air batteries(ZABs).Herein,an alloying-degree control strategy was employed to fabricate nitrogen-doped carbon sphere(NCS)decorated with dual-phase Co/Co_(7)Fe_(3)heterojunctions(CoFe@NCS).The phase composition of materials has been adjusted by controlling the alloying *** optimal CoFe_(0.08)@NCS electrocatalyst displays a half-wave potential of 0.80 V for ORR and an overpotential of 283 mV at 10 mA·cm^(-2)for OER in an alkaline *** intriguing bifunctional electrocatalytic activity and durability is attributed to the hierarchically porous structure and interfacial electron coupling of highly-active Co_(7)Fe_(3)alloy and metallic Co *** the CoFe_(0.08)@NCS material is used as air-cathode catalyst of rechargeable liquid-state zinc-air battery(ZAB),the device shows a high peak power-density(157 mW·cm^(-2))and maintains a stable voltage gap over 150 h,outperforming those of the benchmark(Pt/C+RuO_(2))-based *** particular,the as-fabricated solid-state flexible ZAB delivers a reliable compatibility under different bending *** work provides a promising strategy to develop metal/alloy-based electrocatalysts for the application in renewable energy conversion technologies.

关键词： bifunctional electrocatalysts oxygen reduction reaction oxygen evolution reaction zinc-air battery metal/alloy carbon sphere

Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

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Nano-Micro Letters 2025年第1期17卷 281-292页

作者： Xing Wang Wei Pi Sheng hu Haifeng Bao Na Yao Wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer

湖南省1979-2010年狂犬病流行特征及其毒株遗传关系分析

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中华疾病控制杂志 2012年第9期16卷 774-777页

作者：蔡亮高立冬胡世雄刘运芝刘富强申辛欣陶晓燕李浩刘佳惠王世清曾舸唐青张红湖南省疾病预防控制中心湖南省微生物分子生物学重点实验室湖南长沙410005 中国疾病预防控制中心病毒病预防控制所病毒基因工程国家重点实验室北京102206

目的分析1979-2010年湖南省狂犬病流行特征及分离病毒N基因特征,探讨疫情波动影响因素及病毒进化情况。方法采用回顾性与描述性流行病学方法对湖南省32年来,狂犬病疫情数据进行统计分析;利用PubMed-Entrez Search程序建立GenBank、EMBL... 详细信息

目的分析1979-2010年湖南省狂犬病流行特征及分离病毒N基因特征,探讨疫情波动影响因素及病毒进化情况。方法采用回顾性与描述性流行病学方法对湖南省32年来,狂犬病疫情数据进行统计分析;利用PubMed-Entrez Search程序建立GenBank、EMBL报道的湖南省境内分离的狂犬病毒N基因序列本地数据库,应用生物信息学方法分析病毒N基因特征与变异情况,参考贵州与广西2个高发省份分离的部分狂犬病毒及国内疫苗株CTN-1-V N基因序列,运用Clustal W 1.83软件进行多重序列比对,运用MEGA 5.0.4软件构建N基因系统进化树,分析湖南省分离毒株与贵州、广西分离株亲缘关系及病毒遗传特征差异。结果 32年来,湖南省累计报告狂犬病病例12 576例,总发病率0.69/10万;全省124个县(市、区)均有疫情报告;病例集中于湘南与湘中地区;7～10月份发病数较多(43.23%);农民所占比例最大(64.35%)。58株毒株N基因全序列平均GC含量为44.49%,AT含量为55.51%,平均单链分子量为409.7 KDa;氨基酸组成含量最高的为亮氨酸(Leu),含量最低的为色氨酸(Trp);58株毒株与贵州、广西及国内疫苗株有较近亲缘关系;58株病毒全部属于狂犬病毒基因I型。结论 32年来,湖南省狂犬病疫情存在较大波动;所分离的58株毒株遗传较稳定,未发生关键性变异。

关键词：狂犬病流行病学 N基因计算生物学

Effects of estimating the ionospheric and thermospheric parameters on electron density forecasts

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Science China Earth Sciences 2018年第12期61卷 1875-1887页

作者： Yanan ZHANG Xiaocheng WU xiong hu National Space Science Center Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Based on the thermosphere-Ionosphere-Electrodynamics General Circulation Model(TIEGCM), a thermosphericionospheric data assimilation and forecast system is developed. Using this system, we estimated the oxygen ions, neutral temperature, wind, and composition by assimilating the simulated data from Formosa Satellite 3/Constellation Observing System for Meteorology, Ionosphere, and Climate(COSMIC) occultation electron density profiles to evaluate their effects on the ionospheric forecast. An ensemble Kalman filter data assimilation scheme and combined state and parameter estimation methods are used to estimate the unobserved parameters in the model. The statistical results show that the neutral and ion compositions are more effective than the neutral temperature and wind for improving the forecast of the ionospheric electron density, whose root mean square errors in the assimilation period decreased by approximately 40%, 30%, and 10% due to the estimations of the neutral composition, oxygen ions, and neutral temperature, respectively. Due to the different physical and chemical processes that these parameters primarily affect, their e-folding times differ greatly from longer than 12 h for neutral composition to approximately 6 h for oxygen ions and 3 h for neutral temperature. The effect of estimating the neutral composition on improving the ionospheric forecast is greater than that of estimating the oxygen ions, which can be also be seen in an actual data assimilation experiment. This indicates that the neutral composition is the most important thermospheric parameter in ionospheric data assimilations and forecasts.

关键词： Electron density Ionosphere Thermosphere Data assimilation Ensemble Kalman filter

Advancing Modernisation Through Exchanges

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ChinAfrica 2025年第1期17卷 16-17页

作者： ZHOU QIAN hu LANYIN Institute of African Studies Zhejiang Normal University Zhejiang Normal University

In his keynote speech at the open-ing ceremony of the Beijing Summit of the Forum on China Africa Cooperation(FOCAC)in September 2024,Chinese President Xi Jinping emphasised that China will enhance people-to-people and cultural exchanges with Africa,champion mutual respect,inclusiveness and coexistence of di"erent civilisations on the way to modernisation,and strive together for more fruitful outcomes under the Global Civilisation Initiative.

关键词： mutual Africa fruitful

Wave effect of gravitational waves intersected with a microlens field Ⅱ:An adaptive hierarchical tree algorithm and population study

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 241-254页

作者： Xikai Shan Guoliang Li Xuechun Chen Wen Zhao Bin hu Shude Mao Department of Astronomy Tsinghua University Purple Mountain Observatory Chinese Academy of Sciences Institute for Frontier in Astronomy and Astrophysics Beijing Normal University School of Physics and Astronomy Beijing Normal University School of Astronomy and Space Science University of Science and Technology of China CAS Key Laboratory for Researches in Galaxies and Cosmology Department of Astronomy University of Science and Technology of ChinaChinese Academy of Sciences

The gravitational lensing wave effect generated by a microlensing field embedded in a lens galaxy is an inevitable phenomenon in strong lensed gravitational waves （SLGWs）.This effect presents both challenges and opportunities for the detection and application of ***,investigating this wave effect requires computing a complete diffraction integral over each microlens in the *** is extremely time-consuming due to the large number of microlenses （10～3-10～6）.Therefore,simply adding all the microlenses is ***,the complexity of the time delay surface makes the lens plane resolution a crucial factor in controlling numerical *** this paper,we propose a trapezoid approximation-based adaptive hierarchical tree algorithm to meet the challenges of calculation speed and *** find that this algorithm accelerates the calculation by four orders of magnitude compared to the simple adding method and is one order of magnitude faster than the fixed hierarchical tree algorithm proposed for electromagnetic *** importantly,our algorithm ensures controllable numerical errors,increasing confidence in the *** with our previous work （***.66,239511,2023）,this paper addresses all numerical issues,including integral convergence,precision,and computational time1).Finally,we conducted a population study on the microlensing wave effect of SLGWs using this algorithm and found that the microlensing wave effect cannot be ignored,especially for Type II SLGWs （from saddle position of the time delay surface） due to their intrinsic geometric structures and their typical intersection with a denser microlensing ***,more than 33%（11%） of SLGWs have a mismatch larger than 1%（3%） compared to the unlensed ***,we found that the mismatch between signal pairs in a doubly imaged GW is generally larger than 10-3,and 61%（25%） of signal pairs have a mismatch larger than 1%（3%）.Therefo

关键词： gravitational lensing diffractional integral algorithm gravitational wave

中小学校及托幼机构传染病监测和报告工作评价指标体系构建

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实用预防医学 2018年第12期25卷 1520-1523页

作者：刘修正史静琤罗美玲周美兰肖洁华刘晓峰胡世雄湘潭县疾病预防控制中心湖南湘潭411228 湖南省现场流行病学培训项目中南大学湘雅公共卫生学院湖南省疾病预防控制中心郴州市疾病预防控制中心

目的建立中小学校及托幼机构传染病监测和报告工作评价指标体系,藉以促进各项学校传染病防控措施的落实。方法通过文献查阅、参考法律法规及工作规范和专家咨询的方法,拟定评价指标体系的框架,采用德尔菲法进行两轮专家咨询,根据专家反... 详细信息

目的建立中小学校及托幼机构传染病监测和报告工作评价指标体系,藉以促进各项学校传染病防控措施的落实。方法通过文献查阅、参考法律法规及工作规范和专家咨询的方法,拟定评价指标体系的框架,采用德尔菲法进行两轮专家咨询,根据专家反馈的意见进行综合分析,对指标进行必要的增、减、修,最终确定评价的指标体系。结果建立的中小学校及托幼机构传染病监测和报告工作评价指标体系包括一级指标5个,二级指标21个; 5个一级指标(组织管理、疫情报告人设置、晨午检工作、因病缺课登记与追踪、疫情报告)的权重系数分别为0. 188、0. 208、0. 196、0. 197、0. 211;二级指标中"明确学校疫情报告管理工作的直接负责人及工作职责"、"疫情报告人每天掌握各班级及宿舍的晨检结果和因病缺课情况"、"疫情报告人经县级及以上相关卫生部门培训,有培训考核合格证明"在整个指标中的组合权重较高,分别为0. 071、0. 071、0. 066。结论通过两轮专家咨询,专家对组织管理、疫情报告人设置等26个指标打分评价,最终确定评价指标体系,评价指标体系的建立对中小学校及托幼机构传染病监测和报告工作具有一定的指导意义。

关键词：德尔菲法学校传染病评价指标体系

Synthesis of Spin-ladder Sr_(14)Cu_(24)O_(41)Material by Citrates Sol-gel Method

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Journal of Wuhan University of Technology(Materials Science) 2008年第2期23卷 173-176页

作者： WANG Lili WEI hui hu Ni xiong Rui YU Zuxing TANG Wufeng shi Jing Key Laboratory of Acoustic ＆ Photonic Material and Device Ministry of Education Wuhan 430072 China International Center for Materials Physics Shenyang 110015 China

A new process to synthesize polycrystalline samples of Sr14Cu24O41 was presented. Firstly, dry gel powder of Sr14Cu24O41 was synthesized by the citrates sol-gel method, using Sr（NO3）2, Cu（NO3）2, ethylene glycol and citrate acid as raw materials. Then, polycrystalline samples of Sr14Cu24O41 were prepared by solid-state reaction. Thermal Gravimetric and Differential Thermal Analysis（TG-DTA） showed that the temperature for solid-state reaction is at 942 ℃. The samples are identified to be single phase by X-ray Diffraction（XRD） and Scanning Electron Microscopy（SEM）. The SEM pictures showed that the first-step particles were at even size of about 100 nm by this technique. The electronic transport measurements showed that the doping compound were semiconductor with a crossover temperature T in the Arrhenius plot of the resistivity versus temprature.

关键词： citrates sol-gel solid-state reaction Sr14Cu24O41 spin ladder

Resistant mutants induced by adefovir dipivoxil in hepatitis B virus isolates

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World Journal of Gastroenterology 2014年第45期20卷 17100-17106页

作者： Su-Wen Jiang Li-Peng Yao Ai-Rong hu Yao-Ren hu shi-Xiang Chen Tao xiong Guo-Sheng Gao Xiao-Yue Liang shi-xiong Ding Peng-Jian Weng Institute of Liver Diseases Ningbo No.2 Hospital Department of Molecular Biology School of Medicine Ningbo University Department of Infectious Diseases No.113 Hospital of the PLA

AIM: To investigate the loci of adefovir dipivoxil (ADV)-induced resistance in hepatitis B virus (HBV) isolates and optimize the management of ADV-treated patients.

关键词： Hepatitis B virus Adefovir dipivoxil Drug-resistant mutant Gene sequencing