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Unveiling the future of chemistry:the 2023 emerging investigator issue of Science China Chemistry

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Science China Chemistry 2023年第12期66卷 3323-3330页

作者： li-Jun wan Institute of Chemistry Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

In the dynamic realm of scientific discovery,it is imperative to acknowledge and support the innovative perspectives and groundbreaking research emanating from the next generation of leaders in our *** this end,Scienc... 详细信息

关键词： breaking field chemistry

基于多分支增强和融合注意力机制的水下图像增强算法

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陕西科技大学学报 2025年第1期43卷 193-202页

作者：姚斌韩典芝徐轩李婉陕西科技大学电子信息与人工智能学院陕西西安710021

由于水对光的折射和吸收,水下图像通常会出现严重的退化,如色偏、模糊、能见度低等.为了提高水下图像的可视性,提出了一种基于多分支增强和融合注意力机制的水下图像增强网络MBFA-GAN.首先,通过分析水下图像的色彩退化和模糊因素,设计... 详细信息

由于水对光的折射和吸收,水下图像通常会出现严重的退化,如色偏、模糊、能见度低等.为了提高水下图像的可视性,提出了一种基于多分支增强和融合注意力机制的水下图像增强网络MBFA-GAN.首先,通过分析水下图像的色彩退化和模糊因素,设计了青品色温修复模块和模糊恢复模块对水下图像进行色彩矫正和模糊恢复.然后,基于对多个分支特征的互补性考虑,采用循环合并策略将多个分支增强的特征利用自适应融合模块进行融合,逐步增强图像细节.最后,设计了融合注意力模块,用于深度挖掘图像在通道维度和像素维度的相关性矩阵,以提高增强图像的真实性.实验结果表明,与现有算法相比,提出的水下图像增强算法去模糊效果较好且颜色更真实,可以有效改善水下图像色偏和模糊的问题.

关键词：水下图像增强多分支增强融合注意力生成对抗网络

TIR enzymatic functions:signaling molecules and receptor mechanisms

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aBIOTECH 2023年第2期4卷 172-175页

作者： li wan National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyChinese Academy of SciencesShanghai200032China

The evolutionarily conserved Toll/Interleukin-1 Receptor(TIR)domains across kingdoms of prokaryotes,plants,and animals play critical roles in innate *** studies have revealed the enzymatic functions of TIRs,the structural bases of TIRs as holoenzymes,and the identity of TIR-generated small signaling molecules and their receptors,which significantly advanced our understanding on TIR-mediated immune signaling *** reviewed the most up-to-date findings in TIR enzymatic functions from the perspectives of signaling molecules and receptor mechanisms.

关键词： NLR immune receptors TIR domains Signaling molecules Cell death

2020 emerging investigator issue of Science China Chemistry

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Science China Chemistry 2020年第10期63卷 1331-1335页

作者： li-Jun wan Institute of Chemistry Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Emerging Investigator issue features the works conducted by young scientists in the earlier stage of their independent research career, with the potentials to influence the direction in chemistry and related fields. The contributors are selected from the recommendation of senior scientists as well as the editorial board members of Science China Chemistry.

关键词： editorial senior career

2022 Emerging Investigator Issue of Science China Chemistry

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Science China Chemistry 2022年第11期65卷 2045-2050页

作者： li-Jun wan Institute of Chemistry Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

It is always my pleasure to introduce and promote young scientists to the scientific *** this end,Science China Chemistry(SCC)organized special issues for emerging investigators,namely Emerging Investigator Issue[1,2].Starting from 2020,these issues published innovative research work from young scientists who are at an early stage of their independent research *** results in these papers have attracted widespread attention and all authors are highly evaluated by the editorial board.

关键词： Issue young innovative

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Fostering a growing chemistry community: the 2024 emerging investigator issue of Science China Chemistry

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Science China Chemistry 2024年第12期67卷 3897-3905页

作者： li-Jun wan Institute of Chemistry Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

To support scientists in the early stages of their independent careers,Science China Chemistry places a high priority on recognizing emerging researchers with the potential to shape the future directions of the *** 2024 Science China Chemistry emerging investigators,selected for their significant contributions and innovative potential,were nominated by our esteemed Editorial Board Members and committee of the National Natural Science Foundation of China.

关键词： Foster directions committee

Lattice-confined Ru clusters for hydrogen oxidation reaction with high CO-tolerance

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Science China Chemistry 2020年第9期63卷 1169-1170页

作者： li-Jun wan Institute of Chemistry Chinese Academy of SciencesBeijing 100190China

Hydrogen has been considering as a promising renewable energy source and a viable alternative for fossil-fuels in the future[1,2].Hydrogen oxidation reaction(HOR)and its reverse reaction are two significant reactions for applying hydrogen as electrochemical *** the other hand,platinum is believed to be the best electrocatalyst for HOR,although several drawbacks including high cost,scarcity,low CO tolerance,and depressed catalytic activities in alkaline environments,hinder the development of hydrogen application[1].Hence,it is highly desired to develop Pt-free HOR catalysts with high activity,high stability,low cost,and good resistance to CO poisoning[3].

关键词： confined applying desired

Connected Vehicle-Based Traffic Signal Coordination

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Engineering 2020年第12期6卷 1463-1472页

作者： wan li Xuegang Ban Oak Ridge National Laboratory KnoxvilleTN 37932USA University of Washington SeattleWA 98195USA

This study presents a connected vehicles(CVs)-based traffic signal optimization framework for a coordinated arterial *** signal optimization and coordination problem are first formulated in a centralized scheme as a mixed-integer nonlinear program(MINLP).The optimal phase durations and offsets are solved together by minimizing fuel consumption and travel time considering an individual vehicle’s *** to the complexity of the model,we decompose the problem into two levels:an intersection level to optimize phase durations using dynamic programming(DP),and a corridor level to optimize the offsets of all *** order to solve the two-level model,a prediction-based solution technique is *** proposed models are tested using traffic simulation under various *** with the traditional actuated signal timing and coordination plan,the signal timing plans generated by solving the MINLP and the two-level model can reasonably improve the signal control *** considering varies vehicle types under high demand levels,the proposed two-level model reduced the total system cost by 3.8%comparing to baseline actuated *** reduced the system cost by 5.9%.It also suggested that coordination scheme was beneficial to corridors with relatively high demand *** intersections with major and minor street,coordination conducted for major street had little impacts on the vehicles at the minor street.

关键词： Connected vehicles Traffic signal coordination Dynamic programming Two-level optimization Mixed-integer nonlinear program

Photocatalysts of Cr Doped TiO2 Film Prepared by Micro Arc Oxidation

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Chinese Journal of Chemical Physics 2008年第5期21卷 487-492页

作者： li wan Jian-feng li Jia-you Feng Wei Sun Department of Material Science and Engineering of Education Tsinghua University Beijing 100084China Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China

A series of Cr doped TiO2 films were prepared by micro arc oxidation （MAO） using an electrolyte of Na3PO4＋K2Cr2O7. X-ray diffraction and scanning electron microscopy revealed that the films mainly consisted of anatase phase with a porous surface morphology. The films have an excellent photocatalytic effect for degradation of methylene blue and decomposition of water under visible light illumination. This arises from the formation of Cr3＋/Cr4＋ and oxygen vacancy energy levels owing to Cr doping. The former reduces the electron-hole recombination chance, while the latter generates a new gap between the conduction band （CB） and valence band （VB） of TiO2, which lowers the photo energy of the excited electron in the VB to the oxygen vacancy states. The mechanisms for film synthesis during the MAO process are also presented.

关键词： TiO2 Cr doping Photocatalysis Micro arc oxidation