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The roles and activation of endocardial Notch signaling in heart regeneration

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Cell Regeneration 2021年第1期10卷 27-34页

作者： huicong li Cheng Chang Xueyu li Ruilin Zhang School of life Sciences Fudan UniversityShanghaiChina School of Basic Medical Sciences Wuhan UniversityWuhanChina

As a highly conserved signaling pathway in metazoans,the Notch pathway plays important roles in embryonic development and tissue regeneration.Recently,cardiac injury and regeneration have become an increasingly popular topic for biomedical research,and Notch signaling has been shown to exert crucial functions during heart regeneration as well.In this review,we briefly summarize the molecular functions of the endocardial Notch pathway in several cardiac injury and stress models.Although there is an increase in appreciating the importance of endocardial Notch signaling in heart regeneration,the mechanism of its activation is not fully understood.This review highlights recent findings on the activation of the endocardial Notch pathway by hemodynamic blood flow change in larval zebrafish ventricle after partial ablation,a process involving primary cilia,mechanosensitive ion channel Trpv4 and mechanosensitive transcription factor Klf2.

关键词： Heart regeneration Notch signaling Hemodynamic alteration klf2 Primary cilium Ion channel

Effective Boundary Conditions for the Heat Equation with Interior Inclusion

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Communications in Mathematical Research 2020年第3期36卷 272-295页

作者： huicong li Xuefeng Wang School of Mathematics Sun Yat-sen UniversityGuangzhou 510275Guangdong ProvinceChina School of Science and Engineering Chinese University of Hong KongShenzhenShenzhen 518172Guangdong ProvinceChina

Of concern is the scenario of a heat equation on a domain that contains a thin layer,on which the thermal conductivity is drastically different from that in the bulk.The multi-scales in the spatial variable and the thermal conductivity lead to computational difficulties,so we may think of the thin layer as a thickless surface,on which we impose"effective boundary conditions"(EBCs).These boundary conditions not only ease the computational burden,but also reveal the effect of the inclusion.In this paper,by considering the asymptotic behavior of the heat equation with interior inclusion subject to Dirichlet boundary condition,as the thickness of the thin layer shrinks,we derive,on a closed curve inside a two-dimensional domain,EBCs which include a Poisson equation on the curve,and a non-local one.It turns out that the EBCs depend on the magnitude of the thermal conductivity in the thin layer,compared to the reciprocal of its thickness.

关键词： Heat equation effective boundary conditions weak solution a priori estimates asymptotic behavior

基于ACFM单传感器的裂纹角度识别与重构

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传感器与微系统 2024年第7期43卷 54-58页

作者：李勇高辉周灿丰李慧聪北京石油化工学院机械工程学院北京102600 北京市高等学校能源工程先进连接技术中心北京102600

交变电磁场测量(ACFM)技术广泛应用于海洋装备和制造业等领域中金属结构物的缺陷检测。针对单传感器检测过程中存在的角度偏转和裂纹定位等问题展开了研究。首先,通过COMSOL Multi-physics仿真结果可知B_(x)和B_(y)在多角度偏转的过程... 详细信息

交变电磁场测量(ACFM)技术广泛应用于海洋装备和制造业等领域中金属结构物的缺陷检测。针对单传感器检测过程中存在的角度偏转和裂纹定位等问题展开了研究。首先,通过COMSOL Multi-physics仿真结果可知B_(x)和B_(y)在多角度偏转的过程中存在互补的规律;然后,通过建立比例因子,实现高精度的数值拟合。此外,通过多梯度偏转仿真实现了偏转裂纹的重构。最终通过搭建实验平台和信号特征提取等工作验证了拟合规律的合理性;通过优化拟合公式,提高了检测精度;通过所测角度,进而解决了非平行检测过程中裂纹重构图像的偏转问题。

关键词：交变电磁场测量角度偏转重构比例因子数值拟合

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增强现实上下文感知最新研究进展综述

计算机工程与应用 2024年第14期60卷 14-25页

作者：杨卓麦尔渊李惠聪莫建清广东工业大学计算机学院广州510006 广东省人类运动表现科学重点实验室广州510500 广东工业大学艺术与设计学院广州510062

增强现实通过将数字内容叠加到物理世界,为用户提供沉浸式的数字体验,帮助用户更好地理解真实世界。近年来增强现实上下文感知研究受到广泛关注。增强现实与其上下文密切相关,无论是位置信息、光照水平、头部姿态等基础的上下文信息,还... 详细信息

增强现实通过将数字内容叠加到物理世界,为用户提供沉浸式的数字体验,帮助用户更好地理解真实世界。近年来增强现实上下文感知研究受到广泛关注。增强现实与其上下文密切相关,无论是位置信息、光照水平、头部姿态等基础的上下文信息,还是几何信息、语义信息、眼动信息等更高等级的上下文信息,都不同程度影响增强现实的用户体验。从增强现实上下文感知的最新研究进展出发,概括了增强现实的上下文因素,梳理了增强现实上下文感知的流程,并对增强现实中几何、语义和眼动三种上下文信息的感知方法与最新应用进行了分析。最后,结合增强现实上下文感知研究的现状,探讨了增强现实上下文感知的未来发展趋势,为后续的增强现实上下文感知研究提供参考。

关键词：增强现实上下文感知普适计算眼动追踪人机交互

Electron-withdrawing functional ligand promotes CO2 reduction catalysis in single atom catalyst

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Science China Chemistry 2020年第12期63卷 1727-1733页

作者： Xinyi Ren Song liu huicong li Jie Ding linghui liu Zhichong Kuang ling li Hongbin Yang Fuquan Bai Yanqiang Huang Tao Zhang Bin liu CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China School of Chemical and Biomedical Engineering Nanyang Technological UniversitySingapore 637459Singapore Institute of Theoretical Chemistry College of ChemistryJilin UniversityChangchun 130012China Dalian National Laboratory for Clean Energy Dalian 116023China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China

Electrochemical carbon dioxide reduction reaction (CO2RR) powered by renewable electricity offers an attractive approach to reduce carbon emission and at the same time produce valuable chemicals/fuels.To design efficient CO2 reduction electrocatalyst,it is important to understand the structure-activity relationship.Herein,we design a series of single Co atoms electrocatalysts with well-defined active sites electronic structures,which exhibit outstanding CO2RR activity with controllable selectivity to CO.Experimental and density functional theory (DFT) calculation studies show that introducing nitro (amino) ligand next to single Co atom catalytic center with electron-withdrawing (electron-donating) capability favors (hinders) CO2 reduction catalysis.This work provides an in-depth understanding of how functional ligand affects the splitting of transition metal 3d electron orbital,thereby changing the electron transfer from transition metal active site to CO2,which is closely related to the Gibbs free energy of the rate-determining step (CO2+e^-+*→*CO2^-).

关键词： carbon dioxide reduction electrochemical electron-withdrawing cobalt phthalocyanine single-atom

Machine learning in metal-ion battery research: Advancing material prediction, characterization, and status evaluation

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Journal of Energy Chemistry 2024年第3期90卷 191-204,I0006页

作者： Tong Yu Chunyang Wang huicong Yang Feng li Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016LiaoningChina Department of Physics and Astronomy University of California IrvineIrvineCA92697USA

Metal-ion batteries(MIBs),including alkali metal-ion(li^(+),Na^(+),and K^(3)),multi-valent metal-ion(Zn^(2+),Mg^(2+),and Al^(3+)),metal-air,and metal-sulfur batteries,play an indispensable role in electrochemical energy storage.However,the performance of MIBs is significantly influenced by numerous variables,resulting in multi-dimensional and long-term challenges in the field of battery research and performance enhancement.Machine learning(ML),with its capability to solve intricate tasks and perform robust data processing,is now catalyzing a revolutionary transformation in the development of MIB materials and devices.In this review,we summarize the utilization of ML algorithms that have expedited research on MIBs over the past five years.We present an extensive overview of existing algorithms,elucidating their details,advantages,and limitations in various applications,which encompass electrode screening,material property prediction,electrolyte formulation design,electrode material characterization,manufacturing parameter optimization,and real-time battery status monitoring.Finally,we propose potential solutions and future directions for the application of ML in advancing MIB development.

关键词： Metal-ion battery Machine learning Electrode materials Characterization Status evaluation

Dual-additives enable stable electrode-electrolyte interfaces for long life li-SPAN batteries

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Chinese Chemical Letters 2024年第5期35卷 459-465页

作者： Zhenqiang Guo huicong Yang Qian Wei Shengjun Xu Guangjian Hu Shuo Bai Feng li School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Department of Biochemistry and Molecular Biology College of Life ScienceChina Medical UniversityShenyang 110122China Dalian National Laboratory for Clean Energy Dalian 116023China Shenyang King Power Technology Co. Ltd.Shenyang 110016China

Sulfurized polyacrylonitrile(SPAN)is proposed as a promising cathode material for lithium sulfur batteries.However,the continuous side reactions at the electrolyte-electrode interfaces as well as the slow redox kinetics of SPAN cathode deteriorate the electrochemical performance.In this study,an electrolyte with dual-additives comprising 2-fluoropyridine(2-FP)and lithium difluorobis(oxalato)phosphate(liDFBOP)was used to improve the performance of li||SPAN cells.2-FP has a lower lowest occupied molecular orbital energy than that of the solvents in the electrolyte,leading to its prior reduction.A liF-rich film can be formed on the electrode,effectively improving the stability of the electrolyte-electrode interfaces and prolonging the life.Simultaneously,liDFBOP could form an electrolyte-electrode interface film containing a large amount of li_(x)PO_(y)F_(z) species,compensating for the kinetic deterioration caused by the lower ionic conductive of liF formed at the electrolyte-electrode interface.Hence,an electrode-interface film with good chemical stability and high li^(+) transport was established by liF and li_(x)PO_(y)F_(z)-rich species.The li||SPAN cell with the electrolyte containing dual-additives demonstrates an excellent capacity retention of 97.5%after 200 cycles at 1.0 C,25℃,comparing to 56.2%capacity retention without additives.Moreover,the rate capacities of cells with dual-additives can reach 1128.1 mAh/g at 5 C,comparing to only 813.5 mAh/g using electrolyte without additives.Our results shown that the dual-additives in electrolyte provide a promising strategy for practical application of lithium sulfur batteries with SPAN cathodes.

关键词： Sulfurized polyacrylonitrile lithium metal Interface film 2-Fluoropyridine Difluorobis(oxalato)phosphate

Regulating interfacial chemistry and kinetic behaviors of F/Mo co-doping Ni-rich layered oxide cathode for long-cycling lithium-ion batteries over-20°C-60°C

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Journal of Energy Chemistry 2024年第7期94卷 449-457页

作者： Siqi Guan lin Tao Pei Tang Ruopian Fang Huize Wu Nan Piao huicong Yang Guangjian Hu Xin Geng lixiang li Baigang An Feng li Institute of Energy Materials and Electrochemistry Research University of Science and Technology LiaoningAnshan 114051LiaoningChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016LiaoningChina Shenyang King Power Tech.Co. Ltd.Shenyang 110016LiaoningChina School of Chemical Engineering The University of New South WalesSydney 2052NSWAustralia

Ni-rich layered oxide cathodes have shown promise for high-energy lithium-ion batteries(liBs)but are usually limited to mild environments because of their rapid performance degradation under extreme temperature conditions(below0°C and above 50 °C).Here,we report the design of F/Mo co-doped liNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(FMNCM)cathode for high-performance liBs from-20 to 60°C.F^(-) doping with high electronegativity into the cathode surface is found to enhance the stability of surface lattice structure and protect the interface from side reactions with the electrolyte by generating a liF-rich surface layer.Concurrently,the Mo^(6+) doping suppresses phase transition,which blocks li^(+)/Ni^(2+) mixing,and stabilizes lithium-ion diffusion pathway.Remarkably,the FMNCM cathode demonstrates excellent cycling stability at a high cutoff voltage of 4.4 V,even at 60°C,maintaining 90.6%capacity retention at 3 C after 150 cycles.Additionally,at temperatures as low as-20°C,it retains 77.1%of its room temperature capacity,achieving an impressive 97.5%capacity retention after 500 cycles.Such stable operation under wide temperatures has been further validated in practical Ah-level pouch-cells.This study sheds light on both fundamental mechanisms and practical implications for the design of advanced cathode materials for wide-temperature liBs,presenting a promising path towards high-energy and long-cycling liBs with temperatureadaptability.

关键词： Anion-cation co-doping Wide temperature operation Ni-richlayered cathode Phase transition Surface/interface

Zeolite-confined Fe-site Catalysts for the Hydrogenation of CO_(2) to Produce High-value Chemicals

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Chemical Research in Chinese Universities 2024年第1期40卷 78-95页

作者： HAN Xiaoyang XIA huicong TU Weifeng WEI Yifan XUE Dongping li Minhan YAN Wenfu ZHANG Jia-Nan HAN Yi-Fan College of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001P.R.China State Key Laboratory of Coking Coal Resources Green Exploitation Zhengzhou UniversityZhengzhou450001P.R.China Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou UniversityZhengzhou450001P.R.China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry and College of Chemistry Jilin UniversityChangchun130012P.R.China State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai200237P.R.China

Zeolite-confined Fe-site catalysts(ZFCs)have emerged as superior materials for sustainably producing high-value chemicals through CO_(2) hydrogenation,owing to their adaptable framework,customizable composition,and thermal robustness.They excel in activating,adsorbing,and converting CO_(2) with remarkable efficiency and consistency in performance.This has sparked a surge in research interest in recent years.The review delves into the latest advancements in CO_(2) catalytic hydrogenation to olefins,alcohols,aromatics,and other liquid hydrocarbons,examining the synthesis,modification tactics,and the correlation between structure and performance across various ZFCs.Additionally,it underscores the pivotal factors affecting performance and sheds light on the mechanisms behind selectivity control in the CO_(2) hydrogenation process facilitated by ZFCs.To conclude,it presents pressing challenges and strategic recommendations to inspire the development of high-performance,durable ZFCs for CO_(2) hydrogenation applications.

关键词： Zeolite-confined Fe-site catalyst CO_(2) hydrogenation Modification strategy High-value chemical