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Divalent anion intercalation and etching-hydrolysis strategies to construct ultra-stable electrodes for seawater splitting

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Science China Chemistry 2024年第2期67卷 687-695页

作者： Jiajia Lu Yang Liu han-pu Liang Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao266101China Henan Provincial Key Laboratory of Nanocomposites and Applications Institute of Nano-Structured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou450006China School of Materials Science and Engineering Henan Normal UniversityXinxiang453007China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Shandong Energy Institute Qingdao266101China

Developing stable electrodes for seawater splitting remains a great challenge due to the detachment of catalysts at a large operating current and severe anode corrosion caused by ***,divalent anion intercalation and etching-hydrolysis strategies are deployed to synthesize the ultra-stable anode,dendritic Fe(OH)_(3) grown on Ni(SO_4)_(0.3)(OH)_(1.4)–Ni(OH)_(2).Experimental results reveal that the anode exhibits good activity and excellent stability in alkaline simulated *** 500 h,the current density operated at 1.72 V remains 99.5%,about 210 m A cm^(-2).The outstanding stability originates from the etchinghydrolysis strategy,which strengthens the interaction between the catalyst and the carrier and retards thus the detachment of catalysts at a large current ***,theoretical simulations confirm that the intercalated divalent anions,such as SO_4^(2-) and CO_(3)^(2-),can weaken the adsorption strength of chlorine on the surface of catalysts and hinder the coupling and hybridization between chlorine and nickel,which slows down the anode corrosion and improves catalytic ***,the twoelectrode system shows the remarkable 95.1% energy efficiency at 2,000 A m-2and outstanding stability in 6 mol L^(-1) KOH +seawater at 80 ℃.

关键词： seawater splitting stability divalent anion intercalation etching-hydrolysis

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Engineering FeOOH/Ni(OH)_(2) heterostructures on Ni_(3)S_(2)surface to enhance seawater splitting

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Rare Metals 2024年第5期43卷 1989-1998页

作者： Chen Yang Ya-Dong Li Li-Juan Cao Xi-Long Wang han-pu Liang Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Sino-Danish College University of Chinese Academy of SciencesBeijing 100049China

The construction of highly stable and efficient electrocatalysts is desirable for seawater splitting but remains challenging due to the high concentration of Cl-in ***,FeOOH/Ni(OH)_(2)heterostructure supported on Ni_(3)S_(2)-covered nickel foam(Fe–Ni/Ni_(3)S_(2)/NF)was fabricated by hydrothermal and etching methods,as well as anodic oxidation *** electronic structure of FeOOH and Ni(OH)_(2)could be modulated after depositing FeOOH nanoparticles on Ni(OH)_(2)nanosheet,which greatly boosted the catalytic *** the catalyst used as an electrode for oxygen evolution reaction(OER),it needed low overpotentials of 266 and 368 m V to achieve current densities of 100 and 800 m A·cm^(-2),respectively,in 1 mol·L^(-1)KOH+seawater *** can operate continuously at 100 m A·cm^(-2)for 400 h without obvious ***,in situ generated SO_(4)^(2-)from inner Ni_(3)S_(2)during electrolysis process would accumulate on the surface of active sites to form passivation layers to repel Cl^(-),which seemed to be responsible for superior *** study not only synthesizes an OER catalyst for highly selective and stable seawater splitting,but also gives a novel approach for industrial hydrogen production.

关键词： Anodic oxidation Heterostructure Oxygen evolution reaction Seawater splitting

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Crystal structures of RNA-dependent RNA polymerases from Jingmen tick virus and Alongshan virus

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hLife 2024年第1期2卷 18-31页

作者： Zhenyang Liu Qi Peng pu han Lu Kuai Jianxun Qi Yi Shi CAS Key Laboratory of Pathogen Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijingChina Beijing Life Science Academy BeijingChina International Institute of Vaccine Research and Innovation Savaid Medical SchoolUniversity of Chinese Academy of SciencesBeijingChina Center for Influenza Research and Early-warning CAS-TWAS Center of Excellence for Emerging Infectious DiseaseChinese Academy of SciencesBeijingChina Research Unit of Adaptive Evolution and Control of Emerging Viruses Chinese Academy of Medical SciencesBeijingChina

Jingmenviruses are a group of flavi-like viruses with segmented genome and have been found in various types of hosts,including humans,cattle,monkeys,bats,rodents,sheep,ticks,mosquitoes and ***,including the Jingmen tick virus(JMTV)and Alongshan virus(ALSV),have been associated with febrile illness and flu-like symptoms in *** polymerase plays critical roles in genome replication and transcription and is an ideal target for antiviral ***,we determined the crystal structures of RNA-dependent RNA polymerase(RdRp)domains of JMTV and ALSV at 2.6Åand 3.2Åresolutions,*** overall structures of JMTV and ALSV RdRp domains are similar to those from the typical unsegmented viruses in Flaviviridae family,especially the Flavivirus *** and ALSV RdRps can be divided into three subdomains and the catalytical Motif A-G are conserved like the typical flaviviruses,whereas the zinc-binding pockets are absent from the JMTV and ALSV *** 50-ends of jingmenvirus genomes are varied in length and sequence,and a highly conserved 8-nucleotide element located on the tip of stem loop A was identified and shown to be required for binding with RdRp and performing de novo replication *** findings provide important structural insights into RdRp of segmented flavivirus and reveal the key region of virus genome responsible for replication initiation,which would promote molecular understanding of segmented flavivirus replication and the structure-based design of antiviral drugs against flaviviruses.

关键词： Jingmenviruses X-rays RNA-dependent RNA polymerase replication

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多模态命名实体识别研究进展

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数据分析与知识发现 2024年第4期8卷 50-63页

作者：韩普陈文祺南京邮电大学管理学院南京210003 数据工程与知识服务省高校重点实验室(南京大学) 南京210023

【目的】梳理归纳多模态命名实体识别研究成果,为后续相关研究提供参考与借鉴。【文献范围】在Web of Science、IEEE Xplore、ACM Digital Library、中国知网数据库中,以“多模态命名实体识别”“多模态信息抽取”“多模态知识图谱”为... 详细信息

【目的】梳理归纳多模态命名实体识别研究成果,为后续相关研究提供参考与借鉴。【文献范围】在Web of Science、IEEE Xplore、ACM Digital Library、中国知网数据库中,以“多模态命名实体识别”“多模态信息抽取”“多模态知识图谱”为检索词进行文献检索,共筛选出83篇代表性文献。【方法】从概念、特征表示、融合策略和预训练模型4个方面对多模态命名实体识别研究进行总结论述,指出现存问题和未来研究方向。【结果】多模态命名实体识别目前主要围绕模态特征表示和融合两个方面展开且在社交媒体领域取得了一定进展,需要进一步改进多模态细粒度特征提取和语义关联映射方法以提升模型的泛化性和可解释性。【局限】直接以多模态命名实体识别为研究主题的文献数量较少,在支撑综述结果方面存在局限性。【结论】针对多模态命名实体识别亟需解决的问题展望未来发展趋势,为进一步拓宽多模态学习在下游任务应用的研究范畴、破解模态壁垒和语义鸿沟提供了新思路。

关键词：多模态命名实体识别特征表示多模态融合多模态预训练

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Origin of the Disparity between the Stability of Transmutated Mix-Cation and Mix-Anion Compounds

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Chinese Physics Letters 2024年第5期41卷 53-60页

作者：野仕伟耿松源梁汉普张燮魏苏淮 Beijing Computational Science Research Center Beijing 100193China Advanced Materials Thrust Function HubHong Kong University of Science and TechnologyGuangzhou 511458China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China

Transmutation is an efficient approach for material design. For example, ternary compound CuGaSe_(2) in chalcopyrite structure is a promising material for novel optoelectronic and thermoelectric device applications. It can be considered as formed from the binary host compound ZnSe in zinc-blende structure by cation transmutation(i.e., replacing two Zn atoms by one Cu and one Ga). While cation-transmutated materials are common, aniontransmutated ternary materials are rare, for example, Zn_(2)As Br(i.e., replacing two Se atoms by one As and one Br)is not reported. The physical origin for this puzzling disparity is unclear. In this work, we employ first-principles calculations to address this issue, and find that the distinct differences in stability between cation-transmutated(mix-cation) and anion-transmutated(mix-anion) compounds originate from their different trends of ionic radii as functions of their ionic state, i.e., for cations, the radius decreases with the increasing ionic state, whereas for anions, the radius increases with the increasing absolute ionic state. Therefore, for mix-cation compounds,the strain energy and Coulomb energy can be simultaneously optimized to make these materials stable. In contrast, for mix-anion systems, minimization of Coulomb energy will increase the strain energy, thus the system becomes unstable or less stable. Thus, the trend of decreasing strain energy and Coulomb energy is consistent in mix-cation compounds, while it is opposite in mix-anion compounds. Furthermore, the study suggests that the stability strategy for mix-anion compounds can be controlled by the ratio of ionic radii r3/r1, with a smaller ratio indicating greater stability. Our work, thus, elucidates the intrinsic stability trend of transmutated materials and provides guidelines for the design of novel ternary materials for various device applications.

关键词： stability stability ternary

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Enhanced potency of an IgM-like nanobody targeting conserved epitope in SARS-CoV-2 spike N-terminal domain

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2726-2737页

作者： Bo Liu Honghui Liu pu han Xiaoyun Wang Chunmei Wang Xinxin Yan Wenwen Lei Ke Xu Jianjie Zhou Jianxun Qi Ruiwen Fan Guizhen Wu Wen-xia Tian George F.Gao Qihui Wang College of Veterinary Medicine Shanxi Agricultural University030801 JinzhongChina CAS Key Laboratory of Pathogen Microbiology and Immunology Institute of MicrobiologyChinese Academy of Sciences(CAS)100101 BeijingChina School of Life Sciences Yunnan University650504 KunmingYunnan ProvinceChina NHC Key Laboratory of Biosafety National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and Prevention(China CDC)102206 BeijingChina Savaid Medical School University of Chinese Academy of Sciences101408 BeijingChina

Almost all the neutralizing antibodies targeting the receptor-binding domain(RBD)of spike(S)protein show weakened or lost efficacy against severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)emerged or emerging variants,such as Omicron and its *** suggests that highly conserved epitopes are crucial for the development of neutralizing ***,we present one nanobody,N235,displaying broad neutralization against the SARS-CoV-2 prototype and multiple variants,including the newly emerged Omicron and its ***-electron microscopy demonstrates N235 binds a novel,conserved,cryptic epitope in the N-terminal domain(NTD)of the S protein,which interferes with the RBD in the neighboring S *** neutralization mechanism interpreted via flow cytometry and Western blot shows that N235 appears to induce the S1 subunit shedding from the trimeric S ***,a nano-IgM construct(MN235),engineered by fusing N235 with the human IgM Fc region,displays prevention via inducing S1 shedding and cross-linking virus *** to N235,MN235 exhibits varied enhancement in neutralization against pseudotyped and authentic viruses in *** intranasal administration of MN235 in low doses can effectively prevent the infection of Omicron sub-variant BA.1 and XBB in vivo,suggesting that it can be developed as a promising prophylactic antibody to cope with the ongoing and future infection.

关键词： doses prevention conserved

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面向在线健康社区的生成式方面级情感分析

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现代情报 2024年第10期44卷 142-153页

作者：韩普叶东宇南京邮电大学管理学院江苏南京210003 江苏省数据工程与知识服务重点实验室江苏南京210023

[目的/意义]为解决在线健康社区文本中方面实体和评论实体难以对齐的问题,提出了一种基于端到端的生成式方面级情感分析模型BERT-WWM-GPT。[方法/过程]首先,在模型训练阶段通过编码器抽取文本中包含丰富语义信息的特征向量;其次,基于特... 详细信息

[目的/意义]为解决在线健康社区文本中方面实体和评论实体难以对齐的问题,提出了一种基于端到端的生成式方面级情感分析模型BERT-WWM-GPT。[方法/过程]首先,在模型训练阶段通过编码器抽取文本中包含丰富语义信息的特征向量;其次,基于特征向量和标准预测序列在解码器中迭代生成情感三元组,并通过最大似然估计训练模型参数;然后,在模型推理阶段基于文本语义特征向量在解码器生成预测序列;最后,利用规则得到有效的情感三元组表达。[结果/结论]对自建数据集和5份公共数据集进行验证,结果表明BERT-WWM-GPT模型在两个方面级情感分析任务中的F1值分别比基准模型GTS和MuG RoBERTa-large提升了12.25%和7.22%。BERT-WWM-GPT模型能够有效抽取在线健康社区评论中的多重情感三元组,且在其他领域具有优秀的泛化能力。

关键词：生成式模型方面级情感分析情感三元组在线健康社区

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奖惩视域下区块链政务数据共享演化博弈研究

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管理工程学报 2024年第4期38卷 122-132页

作者：韩普顾亮叶东宇李娜南京邮电大学管理学院江苏南京210003 江苏省数据工程与知识服务重点实验室江苏南京210023

区块链的政务数据共享可在确保数据安全的前提下打通各部门间数据壁垒,对进一步提升政府治理能力和公共服务水平具有重要意义。为探究奖惩视域下多方利益主体在政务数据共享中的行为倾向,本文首先构建了政府部门、区块链服务商和第三方... 详细信息

区块链的政务数据共享可在确保数据安全的前提下打通各部门间数据壁垒,对进一步提升政府治理能力和公共服务水平具有重要意义。为探究奖惩视域下多方利益主体在政务数据共享中的行为倾向,本文首先构建了政府部门、区块链服务商和第三方监管机构的演化博弈模型,其次通过模型稳定性分析探究了三方演化博弈的均衡条件,接着借助MATLAB对演化博弈结果进行仿真分析与验证,最后为推动区块链政务数据共享提出有针对性的建议。研究发现,政府部门、区块链服务商和第三方监管机构是区块链政务数据共享中不可或缺的重要参与者。其中,第三方监管机构对于促进区块链政务数据共享具有重要意义。合理的奖惩机制是区块链政务数据共享中的关键一环,适当的惩罚能够促使区块链服务商提供更安全的服务;适当的奖励可以激励监管机构严格监管区块链服务商的运营环境。本文为进一步推动区块链政务数据共享提供了具体可操作的建议。

关键词：区块链政务数据共享奖惩机制三方演化博弈

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基于异构图注意力网络的药物不良反应实体关系联合抽取研究

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现代情报 2024年第9期44卷 71-81页

作者：仲雨乐韩普许鑫华东师范大学经济与管理学院上海200062 南京邮电大学管理学院江苏南京210003 江苏省数据工程与知识服务重点实验室江苏南京210023

[目的/意义]实体关系联合抽取是药物不良反应监测和知识组织的关键环节。为解决传统流水线抽取方法中误差传递、实体冗余和交互缺失问题,提升药物不良反应重叠三元组抽取效果,提出了一种基于异构图注意力网络的药物不良反应实体关系联... 详细信息

[目的/意义]实体关系联合抽取是药物不良反应监测和知识组织的关键环节。为解决传统流水线抽取方法中误差传递、实体冗余和交互缺失问题,提升药物不良反应重叠三元组抽取效果,提出了一种基于异构图注意力网络的药物不良反应实体关系联合抽取模型MF-HGAT。[方法/过程]首先通过BERT预训练进行外部医学语料资源的知识迁移,实现多语义特征融合;其次将关系信息作为先验知识引入为异构图节点,以避免提取语义无关实体;然后通过迭代融合异构图注意力网络消息传递机制增强字符与关系节点表示;最后在节点表示更新后抽取药物不良反应实体关系。[结果/结论]在自构建药物不良反应数据集上进行实验,发现融入关系信息和外部医疗健康领域知识的MF-HGAT联合抽取F1值达到了92.75%,较主流模型CasRel提升了5.29%。研究结果表明,MF-HGAT模型通过异构图注意力网络融合字符与关系节点语义,可有效解决药物不良反应实体关系重叠问题,对药物不良反应知识发现具有重要意义。

关键词：异构图注意力网络实体关系联合抽取药物不良反应关系重叠知识发现

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基于情感增强和知识融合的在线健康社区情感分析研究

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数据分析与知识发现 2024年第3期8卷 53-62页

作者：张伟徐宗煌蔡鸿宇韩普石进南京大学信息管理学院南京210023 南京邮电大学管理学院南京210003 江苏省数据工程与知识服务重点实验室南京210023

【目的】利用在线健康社区文本依存句法结构中蕴含的情感知识进行情感分析,提出一种基于情感增强和知识融合的在线健康社区情感分析模型WoBEK-GAT。【方法】首先,采用WoBERT Plus实现动态词嵌入;其次,利用卷积神经网络(CNN)和双向长短... 详细信息

【目的】利用在线健康社区文本依存句法结构中蕴含的情感知识进行情感分析,提出一种基于情感增强和知识融合的在线健康社区情感分析模型WoBEK-GAT。【方法】首先,采用WoBERT Plus实现动态词嵌入;其次,利用卷积神经网络(CNN)和双向长短时记忆网络(BiLSTM)提取语义特征;最后,通过情感增强和知识融合策略将剪枝依存句法树中的关键句法信息与外部情感知识充分融合,并输入图注意力网络(GAT)中进而输出情感类别。【结果】在构建的中文数据集上进行对比实验,实验结果表明WoBEK-GAT模型MacroF1值达到88.48%,较基准模型CNN、BiLSTM和GAT分别提升15.49、14.15和13.15个百分点。【局限】未考虑图片和语音等多模态信息中的情感知识。【结论】依存句法信息的加入以及情感增强策略和知识融合策略的结合能够有效提升模型的情感分析能力。

关键词：在线健康社区情感分析情感增强知识融合图注意力网络

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