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The complementary graphene growth and etching revealed by large-scale kinetic Monte Carlo simulation

npj Computational Materials 2021年第1期7卷 117-125页

作者： Xiao Kong Jianing zhuang liyan zhu Feng Ding Centre for Multidimensional Carbon Materials Institute for Basic ScienceUlsan 44919Korea Institute of Textiles and Clothing Hong Kong Polytechnic University999077 Kowloon Hong KongChina Department of Physics and Jiangsu Key Laboratory of Modern Measurement Technology and Intelligent SystemsHuaiyin Normal University223300 Huai’anChina School of Materials Science and Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea

To fully understand the kinetics of graphene growth,large-scale atomic simulations of graphene islands evolution up to macro sizes(i.e.,graphene islands of a few micrometers or with billions of carbon atoms)during growth and etching is essential,but remains a great *** this paper,we developed a low computational cost large-scale kinetic Monte Carlo(KMC)algorithm,which includes all possible events of carbon attachments and detachments on various edge sites of graphene *** a method allows us to simulate the evolution of graphene islands with sizes up to tens of micrometers during either growth or etching with a single CPU *** this approach and the carefully fitted parameters,we have reproduced the experimentally observed evolution of graphene islands during both growth or etching on Pt(111)surface,and revealed more atomic details of graphene growth and *** on the atomic simulations,we discovered a complementary relationship of graphene growth and etching—the route of graphene island shape evolution during growth is exactly the same as that of the etching of a hole in graphene and that of graphene island etching is exactly same as that of hole *** complementary relation brings us a basic principle to understand the growth and etching of graphene,and other 2D materials from atomic scale to macro size and the KMC algorithm is expected to be further developed into a standard simulation package for investigating the growth mechanism of 2D materials on various substrates.

关键词： sizes complementary island

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环境因子对渤海强壮滨箭虫四季种群结构的影响

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中国海洋大学学报（自然科学版） 2025年第1期55卷 107-117页

作者：孙颖陈学超沈阳孙跃王博渊朱丽岩中国海洋大学海洋生命学院山东青岛266003 深圳市海洋发展研究促进中心广东深圳518034 中国海洋大学水产学院山东青岛266003

为深入探究环境因子与渤海强壮滨箭虫四季种群结构动态的关系,并进一步丰富近年来渤海海域浮游动物的相关研究,本研究于2018年4月—2019年12月在渤海海区开展4个航次的海洋综合调查工作,对渤海强壮滨箭虫的时空分布以及生长繁殖状况进... 详细信息

为深入探究环境因子与渤海强壮滨箭虫四季种群结构动态的关系,并进一步丰富近年来渤海海域浮游动物的相关研究,本研究于2018年4月—2019年12月在渤海海区开展4个航次的海洋综合调查工作,对渤海强壮滨箭虫的时空分布以及生长繁殖状况进行了研究,并讨论了温度、盐度、深度以及饵料等环境因子对其种群结构产生的影响。研究结果显示:盐度与强壮滨箭虫的时空分布具有显著的相关性,在28.5~32.7的范围内,盐度的升高对强壮滨箭虫种群增长有抑制作用;温度通过影响强壮滨箭虫的摄食、代谢来影响其季节上的变化;桡足类作为强壮滨箭虫的主要饵料,也是影响强壮滨箭虫生长繁殖的重要因素。

关键词：环境因子渤海强壮滨箭虫时空分布生长状况

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Multiple Images Steganography of JPEG Images Based on Optimal Payload Distribution

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Computer Modeling in Engineering & Sciences 2020年第10期125卷 417-436页

作者： Yang Pei Xiangyang Luo Yi Zhang liyan zhu Zhong Yuan Network Security Research Institute Zhengzhou UniversityZhengzhou450000China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou450000China

Multiple images steganography refers to hiding secret messages in multiple natural images to minimize the leakage of secret messages during ***,the main multiple images steganography algorithms mainly distribute the payloads as sparsely as possible inmultiple cover images to improve the detection error rate of stego *** order to enable the payloads to be accurately and efficiently distributed in each cover image,this paper proposes a multiple images steganography for JPEG images based on optimal payload ***,the algorithm uses the principle of dynamic programming to redistribute the payloads of the cover images to reduce the time required in the process of payloads ***,by reducing the difference between the features of the cover images and the stego images to increase the detection error rate of the stego ***,this paper uses a data decomposition mechanism based on Vandermonde *** if part of the data is lost during the transmission of the secret messages,as long as the data loss rate is less than the data redundancy rate,the original secret messages can be *** results show that the method proposed in this paper improves the efficiency of payloads distribution compared with existing multiple images *** the same time,the algorithm can achieve the optimal payload distribution of multiple images steganography to improve the anti-statistical detection performance of stego images.

关键词： Multiple images steganography payloads distribution dynamic programming messages recovery

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A Multi-Generation Schmakeria poplesia Culturing System for Use in Ecotoxicological Study

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Journal of Ocean University of China 2009年第1期8卷 30-34页

作者： HUANG Ying zhu liyan QIU Xuchun QI Benjin ZHANG Tianwen College of Marine Life Sciences Ocean University of China Qingdao 266003 P. R. China

Crustacean zooplankton form the keystone link between primary producers and fish stocks in marine and estuary, ecosystems. We have established a multi-generation cultivation system for zooplankton ruth which future experiments on the biological effects of pollutants in marine and estuary environments can be better performed. A population of calanoid copepod, Sehmakeria poplesia, was collected in December 2003 and maintained in a static system through all stages （eggs to adults）. The population ex- hinted an average developmental time of 13.6 d in conditions corresponding to the natural environment （water temperature 20~C salinity 15）. A series of experiments were performed to examine copepod egg production and hatching success as functions of food type and feeding concentration. Results in our study showed that Isoehrysis galbana was more favored for the reproduction of cope- pods than Phaeodactylum tricornutum, and 10xl0%ellsmL-1 was the most practical algae concentration. We have demonstrated that the Schmakeria poplesia population can be maintained in the laboratory through multiple generations. In addition, methods to control egg production through changes in food concentration have been established, making it feasible to control the start date of exposure experiments or the timing of the collection of oftspring to initiate a new generation.

关键词： Schmakeria poplesia culturing egg production development toxic pollutants

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Enhancing proton exchange membrane water electrolysis by building electron/proton pathways

Advanced Powder Materials

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Advanced Powder Materials 2024年第4期3卷 103-112页

作者： liyan zhu Hao Zhang Aojie Zhang Tian Tian Yuhan Shen Mingjuan Wu Neng Li Haolin Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of TechnologyWuhan 430070China National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies Foshan Xianhu LaboratoryFoshan 528200China Hubei Key Laboratory of Fuel Cell Wuhan 430070China

Proton exchange membrane water electrolysis(PEMWE)plays a critical role in practical hydrogen *** for the electrode activities,the widespread deployment of PEMWE is severely obstructed by the poor electron-proton permeability across the catalyst layer(CL)and the inefficient transport *** this work,the PEDOT:F(Poly(3,4-ethylenedioxythiophene):perfluorosulfonic acid)ionomers with mixed proton-electron conductor(MPEC)were fabricated,which allows for a homogeneous anodic CL structure and the construction of a highly efficient triple-phase *** PEDOT:F exhibits strong perfluorosulfonic acid(PFSA)side chain extensibility,enabling the formation of large hydrophilic ion clusters that form proton-electron transport channels within the CL networks,thus contributing to the surface reactant water *** PEMWE device employing membrane electrode assembly(MEA)prepared by PEDOT:F-2 demonstrates a competitive voltage of 1.713 V under a water-splitting current of 2 A cm^(-2)(1.746 V at 2A cm^(-2) for MEA prepared by Nafion D520),along with exceptional long-term ***,the MEA prepared by PEDOT:F-2 also exhibits lower ohmic resistance,which is reduced by 23.4%and 17.6%at 0.1 A cm^(-2) and 1.5 A cm^(-2),respectively,as compared to the MEA prepared by *** augmentation can be ascribed to the superior proton and electron conductivity inherent in PEDOT:F,coupled with its remarkable structural *** characteristic enables expeditious mass transfer during electrolytic reactions,thereby enhancing the performance of PEMWE devices.

关键词： Proton exchange membrane water electrolysis Oxygen evolution reaction Mixed proton-electron conductivity Triple-phase boundaries Membrane electrode assembly

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中国商业银行贷款地理分布对银行利润效率的影响

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地理学报 2015年第6期70卷 955-964页

作者：戴志敏朱莉妍浙江大学经济学院杭州310027

商业银行的区域发展研究一直是金融地理研究中关注的重点。目前,对于商业银行贷款投放地理分散化程度能否为银行绩效带来正面的影响仍存在着一定的争议。本文在利用2007-2013年中国13家上市商业银行向各省投放的贷款数据,分析了大型商... 详细信息

商业银行的区域发展研究一直是金融地理研究中关注的重点。目前,对于商业银行贷款投放地理分散化程度能否为银行绩效带来正面的影响仍存在着一定的争议。本文在利用2007-2013年中国13家上市商业银行向各省投放的贷款数据,分析了大型商业银行和中小型商业银行的贷款投放地理分布特征及不良贷款的地理变化趋势的基础上,利用随机前沿分析方法(SFA)及Battese和Collie的基础模型构建超越对数利润函数模型,对商业银行贷款地理投放分散程度对银行利润效率的影响进行了实证分析。研究结果表明:1商业银行提高贷款的地理投放程度有助于提升商业银行经营过程中的盈利和利润效率。2大型商业银行由于受国家政策干预影响较大,贷款投放区域覆盖面更广,尤其是对中西部地区的贷款投放比例明显高于中小型商业银行,其平均利润效率一直高于中小型商业银行。但近年来,随着中小型商业银行贷款地理分散程度逐步提高,两者利润效率的差距逐渐缩小。3目前,中国部分中小型商业银行贷款业务依然以关系型为主,提高贷款的地理投放分散程度会降低其利润效率,应谨慎面对多元化经营问题,不可盲目随从。

关键词：金融地理商业银行贷款地理分布效率中国

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关于中东欧地区人民币国际化的研究

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新金融 2019年第7期 17-23页

作者：朱莉妍浙江金融职业学院金融管理学院

2017年,全国金融工作会议首次将"稳步推进人民币国际化"纳入框架,在"一带一路"倡议的推动下,人民币国际化从支付结算的第一阶段迈向了投融资货币的第二阶段。中东欧国家地处"一带一路"沿线重要区域,自"16+1"合作框架提出以来,中国与中... 详细信息

2017年,全国金融工作会议首次将"稳步推进人民币国际化"纳入框架,在"一带一路"倡议的推动下,人民币国际化从支付结算的第一阶段迈向了投融资货币的第二阶段。中东欧国家地处"一带一路"沿线重要区域,自"16+1"合作框架提出以来,中国与中东欧各国在多领域方面的合作都有了质的飞跃,为人民币国际化提供了重要的发展平台。本文就人民币走进中东欧地区所面临的机遇与挑战进行了深入分析,并为扩大人民币在中东欧国家中的使用提出相应的政策建议。

关键词：人民币国际化一带一路中东欧地区

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Shoot rot of Zizania latifolia and the first record of its pathogen Pantoea ananatis in China

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2022年第4期23卷 328-338页

作者： Zilan XIAO Jianping DENG Xiaojun ZHOU liyan zhu Xiaochan HE Jingwu ZHENG Deping GUO Jingze ZHANG Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects Institute of BiotechnologyZhejiang UniversityHangzhou 310058China Plant Protection and Plant Inspection Station of Jinyun County Jinyun 321401China Jinhua Academy of Agricultural Sciences Jinhua 321017China Department of Horticulture College of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310058China

The aquatic grass Zizania latifolia grows symbiotically with the fungus Ustilago esculenta producing swollen structures called Jiaobai,widely cultivated in China.A new disease of *** was found in Zhejiang Province,*** lesions appeared on the leaf sheaths or sometimes on the leaves near the leaf *** lesions extended along the axis of the leaf shoots and formed long brown to dark brown streaks from the leaf sheath to the leaf,causing sheath rot and death of entire leaves on young *** pathogen was isolated and identified as the bacterium Pantoea ananatis,based on 16 S ribosomal RNA(r RNA)gene sequencing,multilocus sequence analysis(atp D(β-subunit of ATP synthase F1),gyr B(DNA gyrase subunit B),inf B(translation initiation factor 2),and rpo B(β-subunit of RNA polymerase)genes),and pathogenicity *** observations using scanning electron microscopy revealed that the bacterial cells colonized the vascular tissues in leaf sheaths,forming biofilms on the inner surface of vessel walls,and extended between vessel elements via the perforated *** achieve efficient detection and diagnosis of ***,species-specific primer pairs were designed and validated by testing closely related and unrelated species and diseased tissues of *** is the first report of bacterial sheath rot disease of *** caused by *** in China.

关键词： Zizania latifolia Phylogeny Pantoea ananatis Multilocus analysis Scanning electron microscopy Species-specific primers

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Transition-Metal-Catalyzed Unzipping of Single-Walled Carbon Nanotubes into Narrow Graphene Nanoribbons at Low Temperature

Transition-Metal-Catalyzed Unzipping of Single-Walled Carbon...

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第七届全国青年计算物理学术会议

作者： Jinlan Wang Liang Ma Qinghong Yuan liyan zhu Feng Ding Department of Physics Southeast University Institute of Textiles and Clothing Hong Kong Polytechnic University

Graphene,which is the thinnest two-dimensional material in nature,has been extensively studied due to its exceptional mechanical,thermal,electronic,and magnetic properties,and because it has the potential to replace silicon in future electronics and spintronics applications.[1,2]Although pristine graphene is a semimetal,a medium-sized band gap can be opened by cutting into narrow graphene nanoribbons (GNRs)

关键词： ab initio calculations · graphene · heterogeneous catalysis · nanotubes

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中国改革开放进程中的MPA教育

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中国高教研究 2008年第10期 35-38页

作者：朱立言全国公共管理硕士(MPA)专业学位教育指导委员会中国人民大学教授北京100872

MPA教育是中国改革开放进程中产生的新型教育模式。它自国外引入,适应中国国情,形成了一整套确保质量的培养制度,在校和毕业的学生已达45475人。始终围绕党和政府工作大局是MPA教育发展的动力;建设一支专兼职相结合的师资队伍是MPA教育... 详细信息

MPA教育是中国改革开放进程中产生的新型教育模式。它自国外引入,适应中国国情,形成了一整套确保质量的培养制度,在校和毕业的学生已达45475人。始终围绕党和政府工作大局是MPA教育发展的动力;建设一支专兼职相结合的师资队伍是MPA教育发展的灵魂;质量是MPA教育发展的生命线。构建和谐社会,创建服务型政府的时代目标,对MPA教育提出新的历史要求。

关键词：中国改革开放 MPA教育

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