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A multiple flame-retardant,early fire-warning,and highly sensitive thread-shaped all-fabric-based piezoresistive sensor

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Science China(Technological Sciences) 2024年第4期67卷 1151-1159页

作者： LI WeiBiao ZHANG Shuai MA ShuQi wang jiacheng wang Huan YANG QiRong SONG YongTao ZHU Jie North China Institute of Aerospace Engineering Langfang 065000China Langfang Fire and Rescue Division of Hebei Province Langfang 065000China School of Information Science and Engineering Xinjiang College of Science and TechnologyKorla 841000China

In the artificial intelligence age,multifunctional and intelligent fireproof fabric-based electronics are urgently ***,a novel thread-shaped all-fabric-based piezoresistive sensor(denoted as TAFPS)with properties such as flame retardancy,firewarning,and piezoresistivity is proposed,which is composed of an inner nickel-plated fabric electrode,a multifunctional double helix fabric,and an external flame-retardant encapsulation *** to the multiple flame-retardant properties of glass fiber tubular fabric,aminated carbon nanotubes(ACNTs),and ammonium polyphosphate,the char residue of the TAFPS reaches40.3 wt%at 800℃.In addition,the heat-sensitive effect of ACNTs during combustion causes a rapid decrease in the TAFPS resistance,triggering the fire alarm system within 2 ***,benefiting from the force-sensitive behavior of the double helix layer and tightly wrapped pattern of the external heat-shrinkable tubular fabric,TAFPS demonstrated a high sensitivity of4.40 kPa^(-1)(0–5.81 k Pa)and good stability for 10000 *** its excellent flame resistance,high sensitivity,and agreeable stability,the developed TAFPS can be integrated into fire suits to monitor the exercise training process and the external fire *** work offers a novel approach for fabricating all-fabric-based piezoresistive sensors in the future for fire prevention and fire alarms,with promising applications in fire protection,the Internet of Things,and smart apparel.

关键词： all-fabric piezoresistive sensor multiple flame retardancy agile fire-warning high sensitivity

A review on electrocatalytic CO_(2) conversion via C-C and C-N coupling

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Carbon Energy 2024年第2期6卷 167-194页

作者： Zhuangzhi Zhang Sijun Li Zheng Zhang Zhou Chen Hua wang Xianguang Meng Wenquan Cui Xiwei Qi jiacheng wang Hebei Provincial Laboratory of Inorganic Nonmetallic Materials College of Materials Science and EngineeringNorth China University of Science and TechnologyTangshanChina Key Laboratory of Luminescence Analysis and Molecular Sensing Ministry of EducationCollege of Chemistry and Chemical EngineeringSouthwest UniversityChongqingChina State Key Laboratory of New Textile Materials and Advanced Processing Technologies Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing and FinishingCollege of Chemistry and Chemical EngineeringWuhan Textile UniversityWuhanChina College of Materials Xiamen UniversityXiamenChina Hebei Iron and Steel Laboratory TangshanChina Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials College of Chemical EngineeringNorth China University of Science and TechnologyTangshanChina College of Metallurgy and Energy North China University of Science and TechnologyTangshanChina State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina Institute of Electrochemistry School of Materials Science and EngineeringTaizhou UniversityTaizhouChina

Electrochemical C-C and C-N coupling reactions with the conversion of abundant and inexpensive small molecules,such as CO_(2) and nitrogencontaining species,are considered a promising route for increasing the value of CO_(2) reduction *** development of high-performance catalysts is the key to the both electrocatalytic *** this review,we present a systematic summary of the reaction systems for electrocatalytic CO_(2) reduction,along with the coupling mechanisms of C-C and C-N bonds over outstanding electrocatalytic materials recently *** key intermediate species and reaction pathways related to the coupling as well as the catalyst-structure relationship will be also discussed,aiming to provide insights and guidance for designing efficient CO_(2) reduction systems.

关键词： C-C coupling C-N coupling CO_(2) conversion electrocatalysis urea synthesis

Recent advances in nickel-based catalysts in eCO_(2)RR for carbon neutrality

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Carbon Energy 2024年第2期6卷 61-91页

作者： Weikang Peng Fengfeng Li Shuyi Kong Chenxi Guo Haotian Wu jiacheng wang Yi Shen Xianguang Meng Mingxi Zhang Hebei Key Laboratory of Inorganic Nonmetallic Materials School of Materials Science and EngineeringNorth China University of Science and TechnologyTangshanHebeiChina Hebei Iron and Steel Laboratory North China University of Science and TechnologyTangshanChina State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina School of Materials Science and Engineering Taizhou UniversityZhejiangChina

The excessive use of nonrenewable energy has brought about serious greenhouse *** CO_(2) into high-value-added chemicals is undoubtedly the best choice to solve energy *** to the excellent cost-effectiveness and dramatic catalytic performance,nickel-based catalysts have been considered as the most promising candidates for the electrocatalytic CO_(2) reduction reaction(eCO_(2)RR).In this work,the electrocatalytic reduction mechanism of CO_(2) over Ni-based materials is *** strategies to improve the eCO_(2)RR performance are ***,the research on Ni-based materials for syngas generation is briefly ***,the prospects of nickel-based materials in the eCO_(2)RR are provided with the hope of improving transition-metal-based electrocatalysts for eCO_(2)RR in the future.

关键词： carbon energy carbon neutrality CO_(2)reduction electrocatalysis nickel-based materials

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碳碳键链接的二维共价有机框架研究进展

化学学报 2024年第1期82卷 75-102页

作者：魏颖王家成李玥汪涛马述威解令海分子系统与有机器件研究中心(CMSOD)、信息材料与纳米技术研究院、有机电子与信息显示国家重点实验室(IAM)、南京邮电大学南京210023

二维共价有机框架(Two-dimensional Covalent-Organic Frameworks,2D COFs)是指一类由π-共轭构筑单元通过共价键连接形成的具有二维拓扑结构的晶态多孔材料.由于其独特的周期性多孔结构、高比表面积、优异的稳定性等特点在离子传输、... 详细信息

二维共价有机框架(Two-dimensional Covalent-Organic Frameworks,2D COFs)是指一类由π-共轭构筑单元通过共价键连接形成的具有二维拓扑结构的晶态多孔材料.由于其独特的周期性多孔结构、高比表面积、优异的稳定性等特点在离子传输、光电材料、催化等领域展现出了巨大的应用潜力.其中,碳碳键链接的共价有机框架因兼具优异的稳定性和良好的结晶性,被认为是最具有前景的二维聚合物材料之一.近年来,基于不同的设计原则和合成策略涌现出了许多具有不同结构和优异性能的碳碳键链接共价有机框架.在这篇综述中,按照构筑单元的拓扑结构对碳碳键链接共价有机框架进行分类,并归纳总结了迄今为止C=C和C—C键链接的二维共价有机框架在合成方法、结构创新、性能提升以及实际应用领域的研究进展.该综述旨在为相关领域的研究人员更好地设计和合成具有多种功能的多孔结晶材料提供参考,从而促进碳碳键链接共价有机框架材料在光电领域的进一步发展和应用.

关键词：二维聚合物二维共价聚合物共价有机框架碳碳键链接多孔结晶材料

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面向远程监督命名实体识别的噪声检测

计算机研究与发展 2024年第4期61卷 916-928页

作者：王嘉诚王凯王昊奋杜渂何之栋阮彤刘井平华东理工大学信息科学与工程学院上海200237 同济大学设计与创意学院上海200092 迪爱斯信息技术股份有限公司上海200032

针对远程监督命名实体识别(named entity recognition,NER)任务,目前有许多基于强化学习的方法,利用强化学习的强大决策能力,对远程监督生成的自动标注数据进行噪声过滤.然而,这些方法所使用的策略网络模型架构都较简单,识别噪声能力较... 详细信息

针对远程监督命名实体识别(named entity recognition,NER)任务,目前有许多基于强化学习的方法,利用强化学习的强大决策能力,对远程监督生成的自动标注数据进行噪声过滤.然而,这些方法所使用的策略网络模型架构都较简单,识别噪声能力较弱,且都以完整的句子样本为单位进行识别,导致句子中的部分正确信息被丢弃.为解决上述问题,提出了一种新的基于强化学习的方法,称为RLTL-DSNER,该方法可以从远程监督生成的带噪数据中,以单词级别识别正确实例,减少噪声实例对远程监督NER的负面影响.具体来说,在策略网络模型中引入了标签置信函数来准确识别实例.此外,提出了一种新颖的NER模型预训练策略,使其能为强化学习的初始训练提供精准的状态表示和有效的奖励值,引导其向正确的方向更新.在4个数据集上的实验结果验证了RLTL-DSNER方法的优越性,在NEWS数据集上,相较于现有最先进的方法,获得了4.28%的F1提升.

关键词：命名实体识别远程监督深度强化学习噪声检测预训练策略

基于BERT和超图对偶注意力网络的文本情感分析

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计算机应用研究 2024年第3期41卷 786-793页

作者：胥桂仙刘兰寅王家诚陈哲中央民族大学民族语言智能分析与安全治理教育部重点实验室北京100081 中央民族大学信息工程学院北京100081

针对网络短文本存在大量的噪声和缺乏上下文信息的问题,提出一种基于BERT和超图对偶注意力机制的文本情感分析模型。首先利用BERT预训练模型强大的表征学习能力,对情感文本进行动态特征提取;同时挖掘文本的上下文顺序信息、主题信息和... 详细信息

针对网络短文本存在大量的噪声和缺乏上下文信息的问题,提出一种基于BERT和超图对偶注意力机制的文本情感分析模型。首先利用BERT预训练模型强大的表征学习能力,对情感文本进行动态特征提取;同时挖掘文本的上下文顺序信息、主题信息和语义依存信息将其建模成超图,通过对偶图注意力机制来对以上关联信息进行聚合;最终将BERT和超图对偶注意力网络两个模块提取出的特征进行拼接,经过softmax层得到对文本情感倾向的预测结果。该模型在电商评论二分类数据集和微博文本六分类数据集上的准确率分别达到95.49%和79.83%,相较于基准模型分别提高2.27%~3.45%和6.97%~11.69%;同时还设计了消融实验验证模型各部分对分类结果的增益。实验结果表明,该模型能够显著提高针对中文网络短文本情感分析的准确率。

关键词：文本情感分析超图图分类注意力机制

谋开放新篇育强国优师--《教育部关于实施国家优秀中小学教师培养计划的意见》解读

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教师教育学报 2024年第2期11卷 12-21页

作者：宋萑汪佳成北京师范大学教育学部北京100875

2023年7月教育部制定了国家优秀中小学教师培养计划(以下简称“国优计划”),旨在以“双一流”建设高校为依托,选拔培养专业成绩优秀且乐教适教的理工类学科人才,从而为基础教育事业培养和输送高质量的优秀教师。“国优计划”的出台,一... 详细信息

2023年7月教育部制定了国家优秀中小学教师培养计划(以下简称“国优计划”),旨在以“双一流”建设高校为依托,选拔培养专业成绩优秀且乐教适教的理工类学科人才,从而为基础教育事业培养和输送高质量的优秀教师。“国优计划”的出台,一方面是对教师教育历史政策实践,即推动教师教育向高质量发展模式转变,以及健全以开放、协同、联动为主要特点的现代教师教育体系的继承与延续;另一方面是为推动新时代教育强国、科技强国、人才强国建设和契合基础教育发展新形势所制定的创新发展路径,即构建多主体联动,贯通本研、职前职后一体化培养模式,实现“优秀人才”向“优秀教师”转化,切实解决教师队伍建设中存在的学科结构不均衡、培养层次不高等方面的问题,从源头上强化拔尖创新人才的培养。为此,对“国优计划”的政策实施路径提出以下建议:促进政策主体的外部行动协同与内部治理优化;规范研制人才选拔标准与培养方案;建立和健全面向政策实施的专业评估与跟踪监测机制;建立与政策相配套的培训与试点经验交流机制。

关键词： “国优计划” 教师教育体系教师队伍建设人才培养层次多元开放格局基础教育

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具有薄外壁的闭孔泡沫铝棒的弯曲行为

稀有金属材料与工程 2024年第3期53卷 667-675页

作者：王增张赞刘楠楠夏兴川张子晨丁俭王佳成崔李鹏邱子轩王玉江刘永长河北工业大学材料科学与工程学院天津300401 邢台学院物理与电子工程学院河北邢台054001 天津大学材料科学与工程学院天津300350 陆军装甲兵学院装备再制造技术国防科技重点实验室北京100072

通过熔融发泡法制备了具有薄外壁的铝泡沫棒(aluminum foam bar,AFB)。通过悬臂梁弯曲实验和有限元模拟研究了跨度、直径和孔隙率对其弯曲变形行为的影响。采用高速摄像机记录了AFB的弯曲变形行为,并得到了载荷和位移之间的关系。基于... 详细信息

通过熔融发泡法制备了具有薄外壁的铝泡沫棒(aluminum foam bar,AFB)。通过悬臂梁弯曲实验和有限元模拟研究了跨度、直径和孔隙率对其弯曲变形行为的影响。采用高速摄像机记录了AFB的弯曲变形行为,并得到了载荷和位移之间的关系。基于三维有限元的X射线微断层扫描技术(Micro-CT)重建AFB,并进行了数值模拟。结果表明,跨度对破坏行为有重要影响,跨度的增加导致了能量吸收能力下降。此外,直径和相对密度的增加也使得峰值载荷提高。有限元模拟结果与实验结果相吻合,这说明孔壁在弯曲过程中由于不同类型的应力而失效。在失效过程中,裂纹遵循孔壁最薄弱的路径传播。

关键词：泡沫铝棒悬臂梁弯曲失效机制有限元模拟

Anode Interfacial Issues in Solid-State Li Batteries:Mechanistic Understanding and Mitigating Strategies

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Energy & Environmental Materials 2023年第4期6卷 384-404页

作者： jiacheng wang Liquan Chen Hong Li Fan Wu Tianmu Lake Institute of Advanced Energy Storage Technologies Liyang 213300China Henry Royce Institute and Department of Materials School of Natural SciencesThe University of ManchesterManchester M139PLUK Yangtze River Delta Physics Research Center Liyang 213300China Beijing Advanced Innovation Center for Materials Genome Engineering Key Laboratory for Renewable EnergyBeijing Key Laboratory for New Energy Materials and DevicesInstitute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123China

All-solid-state Li metal batteries(ASSLBs)using inorganic solid electrolyte(SE)are considered promising alternatives to conventional Li-ion batteries,offering improved safety and boosted energy *** significant progress has been made on improving the ionic conductivity of SEs,the degradation and instability of Li metal/inorganic SE interfaces have become the critical challenges that limit the coulombic efficiency,power performance,and cycling stability of *** the mechanisms of complex/dynamic interfacial phenomena is of great importance in addressing these ***,recent studies on identifying,understanding,and solving interfacial issues on anode side in ASSLBs are comprehensively *** issues at Li metal/SE interface include Li dendrite growth/propagation,SE cracking,physical contact loss,and electrochemical reactions,which lead to high interfacial resistance and cell *** causes of these issues relating to the chemical,physical,and mechanical properties of Li metal and SEs are systematically ***,effective mitigating strategies are summarized and their effects on suppressing interfacial reactions,improving interfacial Li-ion transport,maintaining interfacial contact,and stabilizing Li plating/stripping are *** in-depth mechanistic understanding of interfacial issues and complete investigations on current solutions provide foundations and guidance for future research and development to realize practical application of high-performance ASSLB.

关键词： all-solid-state Li metal batteries anode interfacial issues interface protection and modification interfacial reaction and evolution li dendrite growth