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Rational synthesis of CaCo_2O_4 nanoplate as an earth-abundant electrocatalyst for oxygen evolution reaction

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Journal of Energy Chemistry 2019年第4期28卷 125-131页

作者： xiao Lin Jing Zhou Dehua Zheng Chengzhi Guan guoping xiao Ning Chen Qing Liu Hongliang Bao Jian-Qiang Wang Shanghai Institute of Applied Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Eco-chemical Engineering College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Canadian Light Source University of Saskatchewan

To accelerate the kinetics of oxygen evolution reaction(OER)regarding the energy conversion and storage approaches,the discovery of desirable cost-effective and highly efficient electrocatalysts is of prime *** study demonstrates a layered CaCo_2O_4with a two-dimensional nanoplate structure,which possesses electrocatalytic activity for *** OER activity was achieved on CaCo_2O_4with a Tafel slope of 71 mV dec^(-1)and a current density of 10 mA cm^(-2)at an overpotential of 371 mV,which was more active than the similar structure LiCoO_*** with X-ray absorption fine structure and density functional theory calculations,the enhanced OER activity and stability are mainly attributed to the unique electronic structure derived from the interaction of Ca and Co,and improved electrical ***_2O_4can be developed as a highly active and earth-abundant catalyst for OER in energy conversion and storage technologies.

关键词： Oxygen evolution reaction CaCo2O4 2D nanoplates Electrocatalysts

Effect of dry density on ^(125)I diffusion in GMZ bentonite

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Science China Chemistry 2012年第9期55卷 1760-1764页

作者： WU Tao LI JinYing DAI Wei xiao guoping SHU FuJun YAO Jun SU YuLan SHI Lei Department of Chemistry Huzhou Teachers CollegeHuzhou 313000China China Institute of Atomic Energy Beijing 102413China China Resources New Energy Group Co. Ltd.HongKongChina East China Institute of Technology Fuzhou 344000China

Gaomiaozi （GMZ） bentonite is regarded as the favorable candidate backfilling material for a potential repository in China. It is important to understand the diffusion behavior of ^125I in GMZ bentonite and compare the diffusion behavior in GMZ and other types of bentonite like MX-80, Avonlea, etc. Therefore, through- and out-diffusion experiments were conducted to obtain the effective diffusion coefficient （De） and distribution coefficient （Kd）. A computer code named Fitting for diffusion coefficient （FDP） was used for the experimental data processing and theoretical modeling. At the dry density of GMZ bentonite from 1600-2000 kg/m^3, the De values of ^125I were （2.4-20.4）×10 ^-12 m^2/s and Ka values were constants. At dry density above 1800 kg/m^3, the diffusion behaviors were almost the same, indicating that the anion exclusion was ineffective. Out-diffusion results showed that the species of ^125I may be changed during the diffusion processing. It was probably caused by some organic mat- ters or reducing substances in GMZ bentonite. Since the main composition of bentonite is montmorillonite, similar diffusion parameters were obtained in GMZ and other types of bentonite. The relationship of DE and accessible porosity （εacc） could be described by Archie＇s law with exponent n = 1.2-2.8 for ^125I diffusion in bentonite, whereas n = 2.0 in GMZ bentonite. Fur- thermore, bentonite with the dry density of 1800 kg/m^3 was proposed as the backfilling materials used in the construction of high level radioactivity waste repository.

关键词： ^125I diffusion GMZ bentonite species distribution coefficient

The landscape of epigenetic regulation and therapeutic application of N^(6)-methyladenosine modifications in non-coding RNAs

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Genes & Diseases 2024年第5期11卷 236-251页

作者： Gui-e Xu Xuan Zhao guoping Li Priyanka Gokulnath Lijun Wang Junjie xiao Institute of Geriatrics(Shanghai University) Affiliated Nantong Hospital of Shanghai University(The Sixth People’s Hospital of Nantong)and School of Life SciencesShanghai UniversityNantongJiangsu 226011China Cardiac Regeneration and Ageing Lab Institute of Cardiovascular SciencesShanghai Engineering Research Center of Organ RepairSchool of Life ScienceShanghai UniversityShanghai 200444China Cardiovascular Division of the Massachusetts General Hospital and Harvard Medical School BostonMA 02114USA

RNA N^(6)-methyladenosine(m^(6)A)methylation is the most abundant and conserved RNA modification in *** participates in the regulation of RNA metabolism and various pathophysiological ***-coding RNAs(ncRNAs)are defined as small or long transcripts which do not encode proteins and display numerous biological regulatory *** to mRNAs,m^(6)A deposition is observed in *** RNA m^(6)A modifications on ncRNAs is of great importance specifically to deepen our understanding of their biological roles and clinical *** this review,we summarized the recent research findings regarding the mutual regulation between RNA m^(6)A modification and ncRNAs(with a specific focus on microRNAs,long non-coding RNAs,and circular RNAs)and their *** also discussed the challenges of m^(6)A-containing ncRNAs and RNA m^(6)A as therapeutic targets in human diseases and their future perspective in translational roles.

关键词： Circular RNA Epigenetic regulation Long non-coding RNA MicroRNA Non-coding RNA RNA m^(6)A modification

Master Artist in Interior Painting in Snuff Bottle

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China & The World Cultural Exchange 2009年第8期75卷 12-14页

作者： Li guoping and xiao Mei

He is an ordinary Chinese artist but his creations stunned former British Prime Minister Thatcher and Danish Queen Margaret II. He was invited to many countries like USA, Japan, South Korea, Italy, Spain and Canada. H... 详细信息

关键词：中国艺术家鼻烟壶手工艺术

Review of dynamics and active control of large-scale space membrane antenna

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Astrodynamics 2024年第1期8卷 1-26页

作者： Xiang Liu guoping Cai Department of Engineering Mechanics MOE Key Laboratory of HydrodynamicsChongqing Research InstituteShanghai Jiao Tong UniversityShanghai200240China

Large-scale space membrane antennas have significant potential in satellite communication,space-based early warning,and Earth *** of their large size and high flexibility,the dynamic analysis and control of membrane antenna are *** maintain the working performance of the antenna,the pointing and surface accuracies must be strictly ***,the accurate dynamic modeling and effective active control of large-scale space membrane antennas have great theoretical significance and practical value,and have attracted considerable interest in recent *** paper reviews the dynamics and active control of large-scale space membrane ***,the development and status of large-scale space membrane antennas are ***,the key problems in the dynamics and active control of large membrane antennas,including the dynamics of wrinkled membranes,large-amplitude nonlinear vibration,nonlinear model reduction,rigid-flexible-thermal coupling dynamic modeling,on-orbit modal parameter identification,active vibration control,and wave-based vibration control,are discussed in ***,the research outlook and future trends are presented.

关键词： large-scale space membrane antenna dynamicmodeling active control

A new method for evaluating the firing precision of multiple launch rocket system based on Bayesian theory

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Defence Technology（防务技术） 2024年第2期32卷 232-241页

作者： Yunfei Miao guoping Wang Wei Tian College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjingJiangsuChina Institute of Launch Dynamics Nanjing University of Science and TechnologyNanjingJiangsuChina

How to effectively evaluate the firing precision of weapon equipment at low cost is one of the core contents of improving the test level of weapon system.A new method to evaluate the firing precision of the MLRS considering the credibility of simulation system based on Bayesian theory is proposed in this *** of all,a comprehensive index system for the credibility of the simulation system of the firing precision of the MLRS is constructed combined with the group analytic hierarchy process.A modified method for determining the comprehensive weight of the index is established to improve the rationality of the index weight *** Bayesian posterior estimation formula of firing precision considering prior information is derived in the form of mixed prior distribution,and the rationality of prior information used in estimation model is discussed *** the simulation tests,the different evaluation methods are compared to validate the effectiveness of the proposed ***,the experimental results show that the effectiveness of estimation method for firing precision is improved by more than 25%.

关键词： Multiple launch rocket system Bayesian theory Simulation credibility Mixed prior distribution Firing precision

SrAl2O4：Eu^2＋,Dy^3＋,Pr^3＋纳米长余辉发光材料的制备与表征

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硅酸盐学报 2011年第2期39卷 199-203页

作者：樊国栋肖国平陕西科技大学化学与化工学院教育部轻化工助剂化学与技术重点实验室西安710021

以硝酸盐和尿素为基质,采用燃烧法在650℃合成了SrAl2O4:Eu2+,Dy3+,Pr3+长余辉发光粉体。研究了样品的晶体结构、晶粒大小及发光性能。结果表明:Eu2+,Dy3+,Pr3+共掺杂的磷光体没有改变铝酸锶的晶体结构,平均晶粒尺寸为41.5 nm;激发和发... 详细信息

以硝酸盐和尿素为基质,采用燃烧法在650℃合成了SrAl2O4:Eu2+,Dy3+,Pr3+长余辉发光粉体。研究了样品的晶体结构、晶粒大小及发光性能。结果表明:Eu2+,Dy3+,Pr3+共掺杂的磷光体没有改变铝酸锶的晶体结构,平均晶粒尺寸为41.5 nm;激发和发射光谱分别为360 nm和515 nm的宽带谱,与SrAl2O4:Eu2+,Dy3+相比,掺杂Pr3+有利于形成结晶度良好的固溶体,掺杂Pr3+的样品初始发光亮度显著提高,大约是其3倍多,同时发光性能得到明显改善,此外对初始亮度增强的机理进行了初步探讨。

关键词：燃烧法铝酸锶铕镝镨长余辉发光材料

Feeding prehistoric coastal community:A study of marine faunal remains at the Jingtoushan site

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Science China Earth Sciences 2024年第5期67卷 1574-1590页

作者： Endong WU guoping SUN Ying ZHANG School of Culture History and LanguageAustralian National UniversityCanberra 2600Australia Zhejiang Provincial Institute of Cultural Relics and Archaeology Hangzhou 310012China National Centre for Archaeology Beijing 100013China

This article examines the abundant marine mollusc,and fish remains at the Jingtoushan shell midden(8,300 to7,800 cal a BP)in Zhejiang Province,China,to investigate the fishing economy,community development,the palaeoenvironment,and their interactions among the prehistoric populations in the lower Yangtze River Basin and southeastern coastal *** also attempts to explore the prosperity and decline of coastal settlements in China during the Neolithic Age and the potential reasons for their rise and fall,*** on the ecological and biological principles of marine animals,standard zooarchaeological methods and radiocarbon dating analysis are used for sampling,identification,measurement,and *** show that at least 11 mollusc taxa and 14 fish taxa can be identified from the Jingtoushan faunal *** ancient Jingtoushan residents possibly lived in a settlement close to the coast and engaged in inshore and offshore fishing,hunting,and gathering as their primary subsistence strategies,with low-level rice cultivation as a supplementary means of ***,the changes in the coastal environment could be one of the reasons why the Jingtoushan residents abandoned their *** research contributes to Chinese Neolithic archaeology with new evidence of the exploitation of marine resources around 8000 a BP in the eastern coastal areas and the relationship between Neolithic community development and environmental changes.

关键词： Neolithic Age Marine faunal remains Fishing economy Palaeoenvironment Community development

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核热高温制氢系统换热网络设计与优化

当代化工研究 2024年第17期 185-189页

作者：李佳文窦真兰肖国萍朱梁张春雁郏琨琪韩超国网上海市电力公司上海200122 中国科学院上海应用物理研究所上海201800 华东理工大学上海200237

核能因其无碳、稳定和高能量密度的突出优势,与高温蒸汽电解技术耦合具有极大的潜力。因此,本文建立了核热高温蒸汽电解系统仿真模型,基于夹点分析方法优化不同过热蒸汽温度和SOEC电堆入口温度下系统的换热网络。结果表明,提高过热蒸汽... 详细信息

核能因其无碳、稳定和高能量密度的突出优势,与高温蒸汽电解技术耦合具有极大的潜力。因此,本文建立了核热高温蒸汽电解系统仿真模型,基于夹点分析方法优化不同过热蒸汽温度和SOEC电堆入口温度下系统的换热网络。结果表明,提高过热蒸汽温度会略微提高系统最小输出热量,而提高SOEC电堆入口温度能有效降低系统最小输出热量。因此,提高电堆入口温度并降低过热蒸汽温度对系统效率更有利,系统效率最高为72.59%。

关键词：固体氧化物电解池制氢核能夹点分析换热网络