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Ir single atoms on NiFeZn-LDH matrix for exceptional oxygen evolution reaction

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Nano Research 2024年第8期17卷 7039-7044页

作者： Muhammad Israr Muhammad Humayun Jiaqi Zhang Khadim Shah xin tan Chen Chen Yadong Li Department of Chemistry Tsinghua UniversityBeijing 100084China Energy Water and Environment LabCollege of Humanities and SciencePrince Sultan UniversityRiyadh11586Saudi Arabia

To address the sluggish kinetics of the oxygen evolution reaction(OER),a potential approach is to rationally design and fabricate extremely effective single atom catalysts(SACs).Using an appropriate matrix to stabilize single-atom active centers with optimal geometric and electronic structures is crucial for enhancing catalytic ***,we report the design and fabrication of Ir single atoms on NiFeZn layered double hydroxide(Ir-SAC/NiFeZn-LDH)electrocatalyst for highly efficient and stable *** is investigated that the NiFeZn support exhibits abundant defect sites and unsaturated coordination *** sites function to anchor and stabilize single Ir single atoms on the *** strong synergetic electronic interaction between the Ir single atoms and the NiFeZn matrix resulted in remarkable OER performance of the as-fabricated Ir-SAC/NiFeZn *** a loading Ir content of 1.09 wt.%,this catalyst demonstrates a highly stable OER activity,with an overpotential of 196 mV at 10 mA·cm^(−2) and a small Tafel slope of 35 mV·dec^(−1) for the OER in a 1 M KOH *** results significantly surpass the performance of the commercially available IrO_(2) catalyst.

关键词： Ir single atoms layered double hydroxides rational design geometric optimization oxygen evolution reaction

Cardiac energy metabolism disorder mediated by energy substrate imbalance and mitochondrial damage upon tebuconazole exposure

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Journal of Environmental Sciences 2024年第2期136卷 270-278页

作者： Tingting Ku Jindong Hu Mengmeng Zhou Yuanyuan Xie Yutong Liu xin tan Lin Guo Guangke Li Nan Sang College of Environmental Science and Resources Research Center of Environment and HealthShanxi UniversityTaiyuan 030006China

Tebuconazole exposure has been described as an increasing hazard to human *** increasing number of recent studies have shown a positive association between tebuconazole exposure and cardiovascular disease risk,which is characterized by the reduction of adenosine triphosphate(ATP)***,researches on the damage of tebuconazole exposure to energy metabolism and the related molecular mechanisms are *** the present study,male C57BL/6 mice were treated with tebuconazole at different low concentrations for 4 *** results indicated that tebuconazole could accumulate in the heart and further induce the decrease of ATP content in the mouse ***,tebuconazole induced an obvious shift in substrate utilization of fatty acid and glucose by disrupting their corresponding transporters(GLUT1,GLUT4,CD36,FABP3 and FATP1)expression,and significantly repressed the expression of mitochondrial biogenesis(Gabpa and Tfam)and oxidative phosphorylation(CS,Ndufa4,Sdhb,Cox5a and Atp5b)related genes in a dosedependent *** investigation revealed that these alterations were related to the IRS1/AKT and PPARγ/RXRα*** findings contribute to a better understanding of triazole fungicide-induced cardiovascular disease by revealing the key indicators associated with this phenomenon.

关键词： Tebuconazole Cardiotoxicity Energy metabolic disorders Energy substrate Mitochondrial damage

What can we learn from quality assurance badges in open-source software?

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Science China(Information Sciences) 2024年第4期67卷 146-163页

作者： Feng LI Yiling LOU xin tan Zhenpeng CHEN Jinhao DONG Yang LI Xuanzhi WANG Dan HAO Lu ZHANG MoE Key Lab of HCST School of Computer SciencePeking University Department of Computer Science Purdue University School of Computer Science & Engineering Beihang University(BUAA) Department of Computer Science University College London(UCL)

In the development of open-source software(OSS), many developers use badges to give an overview of the software and share some key features/metrics conveniently. Among various badges, quality assurance(QA) badges make up a large proportion and are the most prevalent because QA is of vital importance in software development, and ineffective QA may lead to anomalies or defects. In this paper, we focus on QA badges in open-source projects, which present quality assurance information directly and instantly,and aim to produce some interesting findings and provide practical implications. We collect and analyze 100000 projects written in popular programming languages from GitHub and conduct a comprehensive empirical study both inside and outside QA badges. Inside QA badges, we build a category classification for all QA badges based on the properties they focus on, which shows the types of QA badges developers use. Then,we analyze the frequency of the properties that QA badges focus on, and property combinations, too, which present their use status. We find that QA badges focus on various properties while developers give different preferences to different properties. The use status also differs between different programming languages. For example, projects written in C focus on Security to a great extent. Our findings also provide implications for developers and badge providers. Outside QA badges, we conduct a correlation analysis between QA badges and some software metrics that have potential relationships with code quality, contribution quality, and popularity. We find that QA badges have statistically significant correlations with various software metrics.

关键词： quality assurance badge open-source software code quality empirical study

Facile preparation of Fe/N-based biomass porous carbon composite towards enhancing the thermal decomposition of DAP-4

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Defence Technology（防务技术） 2024年第1期31卷 288-294页

作者： Er-hai An Xiao-xia Li Cun-juan Yu Ying-xin tan Zi-jun Fan Qing-xia Li Peng Deng Xiong Cao School of Environment and Safety Engineering North University of ChinaTaiyuan030051PR China College of Safety and Emergency Management Engineering Taiyuan University of Science and TechnologyTaiyuan030024PR China

Fe/N-based biomass porous carbon composite(Fe/N-p Carbon) was prepared by a facile high-temperature carbonization method from biomass,and the effect of Fe/N-p Carbon on the thermal decomposition of energetic molecular perovskite-based material DAP-4 was *** porous carbonaceous materials was considered as the micro/nano support layers for in situ deposition of Fe/N ***/Np Carbon was prepared simply by the high-temperature carbonization *** was found that it showed the inherent catalysis properties for thermal decomposition of *** heat release of DAP-4/Fe/N-p Carbon by DSC curves tested had increased slightly,compared from DAP-4/Fe/N-p *** decomposition temperature peak of DAP-4 at the presence of Fe/N-p Carbon had reduced by 79°C from384.4°C(pure DAP-4) to 305.4°C(DAP-4/Fe/N-p Carbon-3).The apparent activation energy of DAP-4thermal decomposition also had decreased by 29.1 J/*** possible catalytic decomposition mechanism of DAP-4 with Fe/N-p Carbon was proposed.

关键词： Biomass materials Porous carbon DAP-4 Thermal decomposition Facile method

Confusing Object Detection: A Survey

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Computers, Materials and Continua 2024年第3期80卷 3421-3461页

作者： Tong, Kunkun Zou, Guchu tan, xin Gong, Jingyu Qi, Zhenyi Zhang, Zhizhong Xie, Yuan Ma, Lizhuang School of Computer Science and Technology East China Normal University Shanghai 200062 China Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

Confusing object detection (COD), such as glass, mirrors, and camouflaged objects, represents a burgeoning visual detection task centered on pinpointing and distinguishing concealed targets within intricate backgrounds, leveraging deep learning methodologies. Despite garnering increasing attention in computer vision, the focus of most existing works leans toward formulating task-specific solutions rather than delving into in-depth analyses of methodological structures. As of now, there is a notable absence of a comprehensive systematic review that focuses on recently proposed deep learning-based models for these specific tasks. To fill this gap, our study presents a pioneering review that covers both the models and the publicly available benchmark datasets, while also identifying potential directions for future research in this field. The current dataset primarily focuses on single confusing object detection at the image level, with some studies extending to video-level data. We conduct an in-depth analysis of deep learning architectures, revealing that the current state-of-the-art (SOTA) COD methods demonstrate promising performance in single object detection. We also compile and provide detailed descriptions of widely used datasets relevant to these detection tasks. Our endeavor extends to discussing the limitations observed in current methodologies, alongside proposed solutions aimed at enhancing detection accuracy. Additionally, we deliberate on relevant applications and outline future research trajectories, aiming to catalyze advancements in the field of glass, mirror, and camouflaged object detection. © 2024 The Authors. Published by Tech Science Press.

关键词： Mirrors

创业制度环境何以激发科技人才创业意愿?——基于AMO理论视角

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科学学研究 2024年第4期42卷 817-827页

作者：谭新雨华东理工大学社会与公共管理学院上海200237

以高质量创业制度环境“磁吸”全球科技人才创新创业,俨然成为新形势下高水平人才高地和国际科技创新中心建设的迫切现实需求。于是,本研究基于新制度主义理论与AMO理论的整合视角,构建创业制度环境影响科技人才创业意愿的多重中介模型... 详细信息

以高质量创业制度环境“磁吸”全球科技人才创新创业,俨然成为新形势下高水平人才高地和国际科技创新中心建设的迫切现实需求。于是,本研究基于新制度主义理论与AMO理论的整合视角,构建创业制度环境影响科技人才创业意愿的多重中介模型。本研究面向长三角地区三省一市展开多阶段、多来源的问卷调查,并运用结构方程建模方法进行实证分析,结果表明:创业制度环境会通过规制维度、规范维度、认知维度3种形式影响科技人才的创业意愿,其中,创业效能感、创业激情、创业机会认知在创业制度环境与科技人才的创业意愿之间发挥部分中介效应。本研究系统呈现创业制度环境影响科技人才创业的深层次心理机制,为提升创业制度环境对科技人才创业的激励效果提供政策“着力点”。

关键词：创业制度环境创业意愿科技人才创业效能感创业激情

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颗粒离散元岩石模型的宏细观抗拉强度关联

力学学报 2024年第5期56卷 1411-1425页

作者：谭鑫胡跃刚尹心曹文贵湖南大学土木工程学院长沙410082 湖南大学建筑安全与节能教育部重点实验室长沙410082

颗粒离散元数值模型由于具有反映材料宏细观力学特征的天然优势,而被大量学者采用开展岩石力学课题相关研究,但DEM数值模型涉及的跨尺度关联和参数标定问题给研究者带了挑战,且尚未形成获得统一认可的定量分析方法.基于规则排列的圆形颗... 详细信息

颗粒离散元数值模型由于具有反映材料宏细观力学特征的天然优势,而被大量学者采用开展岩石力学课题相关研究,但DEM数值模型涉及的跨尺度关联和参数标定问题给研究者带了挑战,且尚未形成获得统一认可的定量分析方法.基于规则排列的圆形颗粒DEM岩石试件拉伸模型,开展细观接触破裂模式与宏观拉伸破坏强度相关性的力学分析,指出岩石试样宏观抗拉强度取决于内部细观接触破裂模式,而细观破裂模式则受到接触抗拉强度、接触抗剪强度、接触法向刚度、接触切向刚度,甚至颗粒大小及排列方式的共同影响.根据理论分析及数值模拟结果提出了4种细观破裂模式及相应宏观抗拉强度理论计算公式,并将公式修正应用于随机颗粒排列的类岩石材料DEM模型,从细观角度揭示了宏观DEM岩石材料拉伸破坏机理,构建了宏细观抗拉强度参数关联.所建立关联公式的合理性得到了大量随机数值模拟结果的有效验证,可为研究者利用颗粒DEM数值模型进行岩石和混凝土等类脆性材料模拟的参数选取及标定工作提供重要的参考依据.

关键词：离散元岩石破裂宏细观抗拉强度

新媒体背景下少数民族动画符码赋能铸牢中华民族共同体意识

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民族学刊 2024年第1期15卷 111-119,132页

作者：周梅谭欣西南民族大学艺术学院四川成都610041

少数民族动画是在艺术想象下创作实践而成的文化精神承载物,是中华民族文化符号的具体呈现,少数民族动画对中华民族共同体意识“日常生活层面”的传播有着重要作用。新媒体信息传播方式对文化符码的传播和输出产生了文化多元化、对象多... 详细信息

少数民族动画是在艺术想象下创作实践而成的文化精神承载物,是中华民族文化符号的具体呈现,少数民族动画对中华民族共同体意识“日常生活层面”的传播有着重要作用。新媒体信息传播方式对文化符码的传播和输出产生了文化多元化、对象多样化、传播复杂化等影响。少数民族动画文化符码作为铸牢中华民族共同体意识的重要媒介和载体,从1949年-2019年经历了族群认同、自我认同、国家认同的发展历程,在新媒体背景下少数民族动画呈现出与大众文化消费市场距离较远、“碎片化”信息传播需要整合、民族文化差异性与共享性需要平衡、动画观众个性化需求需要协调等特点。研究认为,可以从审美层面契合少数民族动画符码的当代向度,使内容与形式符合现代人的审美需求;从观念与价值层面引导少数民族动画符码的价值构建,以文艺形式承载时代精神,价值引导符合时代发展的需求;从情感与记忆层面满足少数民族动画的与时俱进,传递共同民族心理与共同价值观念,拓展少数民族动画媒体宣传力度,增强少数民族动画赋能铸牢中华民族共同体意识的能力。

关键词：新媒体共同体意识少数民族动画符码危机

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西部地区林业高质量发展的评价指标体系构建及水平测度

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西部林业科学 2024年第3期53卷 23-29,54页

作者：谭鑫李涛谭嘉辉云南省省委党校社会和生态文明教研部云南昆明650111 西南林业大学经济管理学院云南昆明650024

为促进林业高质量、可持续发展,以西部地区林业为研究对象,用新发展理念为基准构建了5大评价指标体系(创新、协调、绿色、开放、共享),并运用变异系数法对中国西部地区2011—2020年林业高质量发展水平进行测度。结果显示:2011—2020年,... 详细信息

为促进林业高质量、可持续发展,以西部地区林业为研究对象,用新发展理念为基准构建了5大评价指标体系(创新、协调、绿色、开放、共享),并运用变异系数法对中国西部地区2011—2020年林业高质量发展水平进行测度。结果显示:2011—2020年,西部地区林业高质量发展整体呈现先下降后上升的态势,由低水平低速发展向高水平高速发展迈进;对西部地区林业高质量发展提升贡献最大的是绿色发展,而共享发展是西部地区林业高质量发展的主要问题。

关键词：林业高质量发展变异系数法水平测度西部地区