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Production of the C/TiO_(2)composite with a high-performance electrochemical property from titanium-rich sludge via in-situ C coating

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Journal of Environmental Sciences 2024年第3期137卷 131-143页

作者： Hualong Wu Yanxia Zhao Jiexi Wang Xiaoyan li Kaimin Shih xuguang li Wei liu School of Water Conservancy and Environment University of JinanJinan 250022China State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of MaterialsXiamen UniversityXiamen 361005China School of Metallurgy and Environment Central South UniversityChangsha 410083China Department of Civil Engineering The University of Hong KongPokfulamHong KongChina Institute of Environment and Ecology Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

Resource recycling from waste-water and sludge is an important part of the 14th Five-Year Plan in China.The emerging titanium-based coagulants have drawn growing attentions due to their strong coagulation capability in water purification and value-added Ti-loaded sludge production.Management and recovery of the high value-added sludge into functional nanomaterials is highly significant for both sludge reduction and environmental remediation.The present study was carried out to investigate the recycle of the coagulated Ti-loaded sludge to produce functional C/TiO_(2)composites as the anode materials for lithium-ion batteries(liBs).It is the first time that the application of the Ti-loaded wastewater sludge derived C/TiO_(2)was evaluated for liBs.The experimental results showed that the carbon coating through in-situ carbonization of the sludge produced the C/TiO_(2)composites with a high specific surface area,stable structural integrity,and excellent electrochemical properties that would facilitate li+diffusion in long-term liBs usage.The C/TiO_(2)composites calcinated from the polytitanium sulfate-coagulated sludge at 800℃(N_(2))exhibited the best electrochemical performance during the cycling tests(601 m Ah/g at 100 m A/g after 200 cycles).The research work demonstrates the promising prospect of the recycle and value-added utilization of the Ti-loaded sludge in the production of high-performance C/TiO_(2)composites for energy storage applications.This study provides a new way for the management and reuse of Ti-loaded waste-sludge.

关键词： Sludge recovery Ti-loaded sludge In-situ coating lithium-ion battery

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Induced migration of endothelial cells into 3D scaffolds by chemoattractants secreted by pro-inflammatory macrophages in situ

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Regenerative Biomaterials 2017年第3期4卷 139-148页

作者： xuguang li Yuankun Dai Tao Shen Changyou Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Cell migration in scaffolds plays a crucial role in tissue regeneration,which can better mimic cell behaviors in vivo.In this study,a novel model has been proposed on controlling 3D cell migration in porous collagen-chitosan scaffolds with various pore structures under the stimulation of inflammatory cells to mimic the angiogenesis process.Endothelial cells(ECs)cultured atop the scaffolds in the Transwell molds which were placed into a well of a 24-well culture plate were promoted to migrate into the scaffolds by chemoattractants such as vascular endothelial growth factor(VEGF)and tumor necrosis factor-alpha(TNF-α)secreted by the pro-inflammatory macrophages incubated in the well culture plate.The phenotype of macrophages was mediated by 50 ng/ml interferongamma(IFN-c)and different concentrations of lipopolysaccharide(LPS,150–300 ng/ml).The cell migration depth had a positive correlation with LPS concentration,and thereby the TNF-a concentration.The ECs migrated easier to a deeper zone of the scaffolds prepared at10C(187 lm in pore diameter)than that at20C(108 lm in pore diameter)as well.The method provides a useful strategy to study the 3D cell migration,and is helpful to reveal the vascularization process during wound healing in the long run.

关键词： cell migration chemoattractants endothelial cells macrophages scaffolds

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Migration of endothelial cells into photo-responsive hydrogels with tunable modulus under the presence of pro-inflammatory macrophages

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Regenerative Biomaterials 2019年第5期6卷 259-267页

作者： Wangbei Cao xuguang li Xingang Zuo Changyou Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Cell migration in three-dimensional environment is extremely important for tissue regeneration and other biological processes.In this work,a model system was developed to study how endothelial cells(ECs)migrate into photo-responsive hydrogels under the presence of pro-inflammatory macrophages.The hydrogel was synthesized from hyaluronic acid grafted with coumarin and methacrylate moieties by both carbon–carbon covalent linking and coumarin dimerization under UV irradiation at 365 nm.The structure of the hydrogel was conveniently modulated by UV irradiation at 254nm to decompose the coumarin dimers,leading to the significant decrease of modulus and increase of swelling ratio and mesh size.Under the presence of M1 macrophages,ECs were induced to migrate into the hydrogels with a different degree.A significant larger net displacement of ECs was found in the softer hydrogel obtained by irradiation with UV at 254nm than in the stiffer original one at day 7.

关键词： 3D cell migration immune-response hydrogel photo-responsive hyaluronic acid

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Monitoring Neutralization Property Change of Evolving Hantaan and Seoul Viruses with a Novel Pseudovirus-Based Assay

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Virologica Sinica 2021年第1期36卷 104-112页

作者： Tingting Ning ling Wang Shuo liu Jian Ma Jianhui Nie Weijin Huang xuguang li Yuhua li Youchun Wang Division of HIV/AIDS and Sexually Transmitted Virus Vaccines National Institutes for Food and Drug Control(NIFDC)Beijing 102629China Division of Arboviruses Vaccine National Institutes for Food and Drug Control(NIFDC)Beijing 102629China Centre for Biologics Evaluation Biologics and Genetic Therapies DirectorateHealth CanadaOttawaON K2J 4X9Canada

The Hantaan virus(HTNV)and Seoul virus(SEOV)mutants have accumulated over time.It is important to determine whether their neutralizing epitopes have evolved,thereby making the current vaccine powerless.However,it is impossible to determine by using traditional plaque reduction neutralization test(PRNT),because it requires large numbers of live mutant strains.Pseudovirus-based neutralization assays(PBNA)were developed by employing vesicular stomatitis virus(VSV)backbone incorporated with HTNV or SEOV glycoproteins(VSVDG*-HTNVG or VSVDG*-SEOVG).56 and 51 single amino acid substitutions of glycoprotein(GP)in HTNV and SEOV were selected and introduced into the reference plasmid.Then the mutant pseudoviruses were generated and tested by PBNA.The PBNA results were highly correlated with PRNT ones with R2 being 0.91 for VSVDG*-HTNVG and 0.82 for VSVDG*-SEOVG.53 HTNV mutant pseudoviruses and 46 SEOV mutants were successfully generated.Importantly,by using PBNA,we found that HTNV or SEOV immunized antisera could neutralize all the corresponding 53 HTNV mutants or the 46 SEOV mutants respectively.The novel PBNA enables us to closely monitor the effectiveness of vaccines against large numbers of evolving HTNV and SEOV.And the current vaccine remains to be effective for the naturally occurring mutants.

关键词： Hemorrhagic fever with renal syndrome(HFRS) Hantaan virus(HTNV) Seoul virus(SEOV) Pseudovirus-based neutralization assay(PBNA) Amino acid substitution Vaccine

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Cellular tropism and antigenicity of mink-derived SARS-CoV-2 variants

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Signal Transduction and Targeted Therapy 2021年第6期6卷 1668-1670页

作者： li Zhang Qianqian li Jianhui Nie Ruxia Ding Haixin Wang Jiajing Wu xuguang li Xiaoming Yang Weijin Huang Youchun Wang Division of HIV/AIDS and Sex-transmitted Virus Vaccines Institute for Biological Product ControlNational Institutes for Food and Drug Control(NIFDC)and WHO Collaborating Center for Standardization and Evaluation of BiologicalsBeijingChina Centre for Biologies Evaluation Biologic and Radiopharmaceutical Drugs DirectorateHPFBHealth CanadaOttawaONCanada China National Biotec Group Company limited BeijingChina

Dear Editor,The outbreak of SARS-CoV-2 in minks has been observed recently,raising serious concerns over cross-species transmission and the emergence of variants capable of rendering antibody therapy and vaccines less effective.Here,the species tropism and antigenicity of the spike protein of ten variants were analyzed in pseudovirus-based assays involving 25 cell lines as well as 293T cells expressing ACE2 receptor from 14 species.

关键词： ACE2 mink variants

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蜂窝夹层结构复合材料的吸波隐身技术研究进展

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复合材料学报 2024年第6期41卷 2775-2788页

作者：李旭光吴雪猛石珺玺杨晋国营四达机械制造公司

随着探测技术的快速发展与作战性能的需求，对雷达隐身技术提出了更高的要求，蜂窝夹层结构作为经典的结构型吸波材料近年来取得了长足的发展，本文旨在综合分析和总结国内外蜂窝夹层结构复合材料在吸波隐身技术领域的特点、研究现状及... 详细信息

随着探测技术的快速发展与作战性能的需求，对雷达隐身技术提出了更高的要求，蜂窝夹层结构作为经典的结构型吸波材料近年来取得了长足的发展，本文旨在综合分析和总结国内外蜂窝夹层结构复合材料在吸波隐身技术领域的特点、研究现状及应用情况，重点探讨了影响蜂窝夹层结构吸波性能的关键因素，包括吸波剂性能、蜂窝结构设计和蒙皮的透波性能等，并就吸波带宽、吸收率等关键指标分析了不同蜂窝夹层结构吸波材料的优缺点。此外，总结了蜂窝夹层结构吸波隐身复合材料目前的发展趋势，归纳了发展现状，并对未来的发展方向进行了展望。

关键词：雷达吸波材料蜂窝夹层结构吸波性能隐身技术超材料发展趋势

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基于三元交互理论的虚拟学术社区知识交流效果评价研究

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现代情报 2024年第3期44卷 23-33,46页

作者：陆颖颖张恒陈琦王奕霖李旭光山东理工大学信息管理学院山东淄博255000 武汉市江岸区图书馆湖北武汉430014 南京大学信息管理学院江苏南京210023 天津市自来水集团津南水务有限公司天津300350

[目的/意义]虚拟学术社区知识交流效果评价有助于优化社区知识管理。[方法/过程]本文借鉴三元交互理论,以知识交流主体、客体和环境作为交流效果评价指标体系的一级指标。结合相关文献,自上而下构建相应的二、三级指标,通过专家评估确... 详细信息

[目的/意义]虚拟学术社区知识交流效果评价有助于优化社区知识管理。[方法/过程]本文借鉴三元交互理论,以知识交流主体、客体和环境作为交流效果评价指标体系的一级指标。结合相关文献,自上而下构建相应的二、三级指标,通过专家评估确定评价指标体系,根据层次分析法确定各指标权重。最后,以小木虫为例进行验证。[结果/结论]分析表明,本文提出的知识交流评价体系具有一定的可行性与合理性,并提出虚拟学术社区知识交流质量提升的对策。

关键词：虚拟学术社区小木虫知识交流效果评价层次分析法模糊综合评价法

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基于损失特征矩阵的CHB-BESS模块间接地故障诊断

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储能科学与技术 2024年第3期13卷 850-857页

作者：刘志豪高逸群张君凌志斌李旭光上海交通大学上海200240

模块间接地故障是H桥级联型电池储能系统(cascaded H bridge based battery energy storage system,CHB-BESS)的易发故障,快速诊断故障位置对减少故障损失至关重要。模块间接地故障的故障特征主要体现在零序电流上,会受到接地过渡电阻... 详细信息

模块间接地故障是H桥级联型电池储能系统(cascaded H bridge based battery energy storage system,CHB-BESS)的易发故障,快速诊断故障位置对减少故障损失至关重要。模块间接地故障的故障特征主要体现在零序电流上,会受到接地过渡电阻的影响。为实现接地过渡电阻不确定情况下,故障模块位置的快速准确鲁棒定位,本工作提出了一种基于损失特征矩阵的快速故障诊断方法。首先,本工作建立了零序等效电路模型;然后,将零序电流模型离散化;接着,提出基于损失特征矩阵的定位方法,该方法使用拓扑矩阵描述故障位置和过渡电阻的遍历信息,基于离散化模型来遍历计算零序电流,将计算结果与测量结果的偏差记录在损失特征矩阵中,通过偏差最优解确定故障位置;其次,本工作证实了故障定位问题作为最优化问题具有最优解唯一性,偏差最优解在接地过渡电阻不确定的情况下可获得准确的故障发生位置;最终,基于最优解唯一性提出了最优化计算的加速方法。实测表明,所提方法的平均定位误差仅为0.2个子模块,在接地过渡电阻较大范围不确定的情况下实现了准确定位,并且所提加速方法显著提高诊断速度。

关键词： CHB-BESS 模块间接地故障故障诊断损失特征矩阵最优化计算

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船舶压载水处理系统中的遥控蝶阀概述

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山东化工 2024年第1期53卷 145-147页

作者：李振伟李续光卢晓伟青岛双瑞海洋环境工程股份有限公司山东青岛266101

船舶压载水处理系统的遥控蝶阀,需要具有调节或开关功能;通过总结电动、气动、液压和电液式等遥控蝶阀的各自特点,如工作原理、优缺点等,为压载水处理系统遥控蝶阀选择提供建议。基于蝶阀频繁动作、高调节精度、低故障率、低成本、安装... 详细信息

船舶压载水处理系统的遥控蝶阀,需要具有调节或开关功能;通过总结电动、气动、液压和电液式等遥控蝶阀的各自特点,如工作原理、优缺点等,为压载水处理系统遥控蝶阀选择提供建议。基于蝶阀频繁动作、高调节精度、低故障率、低成本、安装简便等方面考虑,建议选用气动调节蝶阀;若只要求具备开关功能,可根据船舶实际情况选择气动开关阀门或液压开关阀门。

关键词：电动遥控蝶阀气动遥控蝶阀液压遥控蝶阀电液式遥控蝶阀

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变流器虚拟惯量和阻尼协同自适应控制策略

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电气自动化 2024年第1期46卷 89-92页

作者：王珺凌志斌李旭光上海交通大学电力传输与功率变换控制教育部重点实验室上海200240

针对变流器传统虚拟同步发电机控制(virtual synchronous generator,VSG)在暂态过程中出现的频率超调等问题,提出一种虚拟惯量和阻尼系数协同自适应控制策略。首先,对VSG变流器系统进行数学建模;然后,通过分析VSG有功和角频率暂态特性曲... 详细信息

针对变流器传统虚拟同步发电机控制(virtual synchronous generator,VSG)在暂态过程中出现的频率超调等问题,提出一种虚拟惯量和阻尼系数协同自适应控制策略。首先,对VSG变流器系统进行数学建模;然后,通过分析VSG有功和角频率暂态特性曲线,提出一种虚拟惯量和阻尼系数协同自适应控制策略,同时借鉴传统同步发电机小信号模型分析方法建立有功功率环路传递函数,给出参数的选取范围;最后,基于MATLAB/Simulink仿真,验证了所提自适应控制策略在改善频率和功率暂态特性方面的有效性。

关键词：虚拟同步发电机自适应控制虚拟惯量阻尼小信号模型功角特性

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