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Novel carbon-nitride based catalysts for enhanced CH_(4) reforming under visible light: From morphology to heterojunction design principles

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能源化学:英文版 2023年第8期83卷 423-432,I0011页

作者： yufei huang Ding Wei Ziyi Li Yu Mao Yangqiang huang Bo Jin Xiao Luo Zhiwu Liang Joint International Center for CO_(2)Capture and Storage(iCCS) The Engineering Research Center of Advanced CatalysisMinistry of Education ProvincialHunan Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing CO_(2)EmissionsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082HunanChina

The synthesis of high value-added chemical products using CO_(2)and CH_(4)is a promising CO_(2)conversion technology that can reduce greenhouse gas emissions while also alleviating the energy crisis.However,problems such as high energy consumption and strict reaction conditions in reforming process hinder the further development of the technology.In this work,carbon-nitrogen based composites were prepared for the first time according to the design principle from morphology to heterojunction,which is innovatively applied in the process of photocatalytic CH4reforming.Firstly,C_(3)N_(4)materials with different dimensions(D) are prepared and applied to a CO_(2)-CH_(4)photocatalytic system.Additionally,the 2D/2D TiO_(2)/g-C_(3)N_(4)heterostructure is constructed with the ultrasonic impregnation method to further improve charge generation,transfer,and separation efficiency.It is worth noting that the yield of CO reaches173.80 μmol g^(-1),and the catalytic performance is improved by 1546% compared to bulk C_(3)N_(4).Moreover,the physical and chemical properties of 2D/2D TiO_(2)/g-C_(3)N_(4)materials are studied using a variety of cha racterization methods.Furthermore,the work fu nction and adsorption energy of different C3N4/TiO_(2)models for CO_(2)adsorption are calculated by density functional theory(DFT).Then,a possible catalytic mechanism for photocatalytic CO_(2)and CH_(4) conversion is proposed based on DFT calculations and experimental results.This work provides a new technical route for the rapid conversion of CO_(2)and CH_(4) at room temperature,as well as a new research concept for achieving carbon neutrality.

关键词： Photocatalytic CO_(2) CH_(4) 2D/2DTiO_(2)/g-C_(3)N_(4) Conversion

Regular Graphs with a Complete Bipartite Graph as a Star Complement

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Journal of Mathematical Research with Applications 2023年第5期43卷 505-521页

作者： Xiaona FANG Lihua YOU Rangwei WU yufei huang School of Mathematical Sciences South China Normal University Department of Mathematics Teaching Guangzhou Civil Aviation College

Let G be a graph of order n and μ be an adjacency eigenvalue of G with multiplicity k ≥ 1. A star complement H for μ in G is an induced subgraph of G with n-k vertices and no eigenvalue μ, and the vertex subset X = V(G-H) is called a star set for μ in G. The star complement technique provides a spectral tool for reconstructing a certain part of a graph from the remaining part. In this paper, we study the regular graphs with Kt,s(s ≥ t ≥ 2) as a star complement for an eigenvalue μ, especially, characterize the case of t = 3 completely, obtain some properties when t = s, and propose some problems for further study.

关键词： adjacency eigenvalue star set star complement regular graph

女大学生依恋取向与情绪调节策略的关系:情绪调节目标的中介作用

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西南大学学报（社会科学版） 2024年第2期50卷 216-227页

作者：黄于飞陈旭史攀西南大学心理学部重庆400715

情绪调节策略是成功调节情绪的核心,也是维持心理健康的关键。为探讨依恋、情绪调节目标及情绪调节策略之间的关系,采用亲密关系经历量表、情绪调节目标量表及情绪调节问卷对774名女大学生进行调查。结果表明:(1)依恋取向与情绪调节策... 详细信息

情绪调节策略是成功调节情绪的核心,也是维持心理健康的关键。为探讨依恋、情绪调节目标及情绪调节策略之间的关系,采用亲密关系经历量表、情绪调节目标量表及情绪调节问卷对774名女大学生进行调查。结果表明:(1)依恋取向与情绪调节策略显著相关。依恋回避与认知重评策略显著负相关,与表达抑制和非适应性认知调节情绪策略显著正相关;依恋焦虑与表达抑制策略和非适应性认知情绪调节策略呈显著正相关,与适应性认知情绪调节策略存在微弱但显著的正相关。(2)依恋取向与情绪调节目标显著相关。依恋回避与反享乐目标显著正相关;依恋焦虑与反享乐目标、印象管理目标以及亲社会目标显著正相关。(3)依恋取向对情绪调节策略有显著影响,情绪调节目标在依恋取向与情绪调节策略之间起显著的中介作用。未来的实证研究可以采取纵向实验设计,结合多模态的实验方式,更细致地区分实验情境,从情境和个人特质交互的角度建立依恋和情绪调节之间的多因素模型。未来的干预研究也可针对不同依恋取向的个体,通过影响其情绪调节目标,从而引导其选择最合适或最有效的情绪调节策略,以达到最佳的情绪调节效果。

关键词：依恋取向依恋焦虑依恋回避情绪调节目标情绪调节策略

礼器、德行与俗世追求——先秦两汉金玉观之变迁

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湖北文理学院学报 2024年第4期45卷 36-40,77页

作者：黄宇霏华中师范大学文学院湖北武汉430079

先秦两汉时对金玉的理解,呈现为三种指向,体现了三个历史阶段的思想、风俗变迁。商周时金玉是仪式性礼乐制度下的重要表征符号,是在祭祀、宴飨等重要仪式中,用以标识身份尊卑与礼仪秩序的礼器;在此基础上,周代的金玉进一步被人格化、伦... 详细信息

先秦两汉时对金玉的理解,呈现为三种指向,体现了三个历史阶段的思想、风俗变迁。商周时金玉是仪式性礼乐制度下的重要表征符号,是在祭祀、宴飨等重要仪式中,用以标识身份尊卑与礼仪秩序的礼器;在此基础上,周代的金玉进一步被人格化、伦理化,成为了君子比德的象征物,强调君子内质之美。在两汉,金玉被大量用于展示俗世生活的富贵气象,其修饰对象下沉,成为了彰显世俗富贵的最佳展示物;随着汉代时期求仙思想的普及,金玉亦成为了仙界的表征,常被用来形容仙物或仙人居所,还被视为可使人长生不老的成仙之物。先秦两汉金玉观经历了从用作礼器、君子之德的象征再到展示世俗富贵和仙界的变化。造成这一变化的原因:一是由于礼乐制度崩溃后青铜文明衰落,伴随着铁器制造技术的兴起和发展,黄金开采的增加与商品流通的加剧,金玉越来越被视作财富的代表;二是在冶金、炼丹技术的发展下,人对金玉的特性有了新的认识,认为金玉有使人长寿、长生不老的功效,因而将其“仙化”。

关键词：先秦两汉金玉观礼器德行俗世追求

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乌克兰卡霍夫卡大坝损毁的多维度影响评估

Science Bulletin 2024年第11期69卷 1642-1646页

作者：陈斌安佳夫黄玉飞陈曦东吴胜标林晨宫鹏 Future Urbanity&Sustainable Environment(FUSE)Lab Division of Landscape ArchitectureDepartment of ArchitectureFaculty of ArchitectureThe University of Hong KongHong Kong 999077China Department of Real Estate and Construction Faculty of ArchitectureThe University of Hong KongHong Kong 999077China Faculty of Business and Economics The University of Hong KongHong Kong 999077China Department of Geography and Department of Earth SciencesThe University of Hong KongHong Kong 999077China

Water plays a central role in sustaining a thriving human society. Given its immense importance, safeguarding the related water infrastructure such as dams and reservoirs, which ensures the proper functioning of water... 详细信息

关键词：影响评估 reservoirs immense

An Extension of the Rényi Formula

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Journal of Mathematical Research with Applications 2016年第3期36卷 265-271页

作者： yufei huang Bolian LIU Department of Mathematics Teaching Guangzhou Civil Aviation College College of Mathematical Science South China Normal University

In this paper, as a natural extension of the Rényi formula which counts labeled connected unicyclic graphs, we present a formula for the number of labeled（k + 1）-uniform（p, q）-unicycles as follows:U（k+1）p, q={p... 详细信息

关键词： Labeled hypergraph (p,q)-unicycles (k + 1)-uniform Rényi formula

Ordering Graphs by the Augmented Zagreb Indices

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Journal of Mathematical Research with Applications 2015年第2期35卷 119-129页

作者： yufei huang Bolian LIU Department of Mathematics Teaching Guangzhou Civil Aviation College College of Mathematical Science South China Normal University

Recently, Furtula et al. proposed a valuable predictive index in the study of the heat of formation in octanes and heptanes, the augmented Zagreb index（AZI index） of a graph G, which is defined as AZI（G） =∑uv∈E（G）( d;d;/d;+ d;-2);,where E（G） is the edge set of G, d u and d v are the degrees of the terminal vertices u and v of edge uv, respectively. In this paper, we obtain the first five largest（resp., the first two smallest） AZI indices of connected graphs with n vertices. Moreover, we determine the trees of order n with the first three smallest AZI indices, the unicyclic graphs of order n with the minimum, the second minimum AZI indices, and the bicyclic graphs of order n with the minimum AZI index, respectively.

关键词： augmented Zagreb index connected graphs trees unicyclic graphs bicyclic graphs

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基于阻变存储器的物理不可克隆函数设计

半导体技术 2024年第4期49卷 341-349页

作者：冯平廖文丽左石凯陈铖颖黄渝斐厦门理工学院光电与通信工程学院福建厦门361024

物理不可克隆函数(PUF)将集成电路制造过程中产生的工艺变化作为一种安全原语,已被广泛应用于硬件安全领域,特别是身份认证和密钥存储。提出了一种基于阻变存储器(RRAM)阵列的PUF优化设计,采用2T2R差分存储结构,并利用阵列中RRAM单元的... 详细信息

物理不可克隆函数(PUF)将集成电路制造过程中产生的工艺变化作为一种安全原语,已被广泛应用于硬件安全领域,特别是身份认证和密钥存储。提出了一种基于阻变存储器(RRAM)阵列的PUF优化设计,采用2T2R差分存储结构,并利用阵列中RRAM单元的阻值变化产生PUF的随机性,以实现更高安全级别所需的大量激励-响应对(CRP)。RRAM PUF的存储单元基于28 nm工艺实现,其面积仅为0.125μm~2,相比传统PUF存储单元面积开销减小,在入侵和侧信道攻击方面具有更好的鲁棒性。实验数据表明,RRAM PUF唯一性达到了约49.78%,片内汉明距离为0%,一致性良好,具有较好的随机性。

关键词：硬件安全阻变存储器(RRAM) 物理不可克隆函数(PUF) 激励-响应对(CRP) 灵敏放大器

Spatio-temporal Variations of Temperature and Precipitation During 1951–2019 in Arid and Semiarid Region, China

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Chinese Geographical Science 2022年第2期32卷 285-301页

作者： huang yufei LU Chunyan LEI Yifan SU Yue SU Yanlin WANG Zili College of Computer and Information Sciences Fujian Agriculture and Forestry UniversityFuzhou 350002China Key Laboratory of Ecology and Resources Statistics of Fujian Province Universities Fujian Agriculture and Forestry UniversityFuzhou 350002China Statistical Information Research Center of Fujian Province Fujian Agriculture and Forestry UniversityFuzhou 350002China Research Centre of Resource and Environment Spatial Information Statistics of Fujian Province Fujian Agriculture and Forestry UniversityFuzhou 350002China

Understanding the spatio-temporal variations of temperature and precipitation in the arid and semiarid region of China(ASRC)is of great significance for promoting regional eco-environmental protection and policy-making.In this study,the annual and seasonal spatio-temporal patterns of change in average temperature and precipitation and their influencing factors in the ASRC were analyzed using the Mann-Kendall test,linear tendency estimation,accumulative anomaly and the Pearson’s correlation coefficient.The results showed that both annual average temperature and average annual precipitation increased in the ASRC during 1951–2019.The temperature rose by about 1.93℃and precipitation increased by about 24 mm.The seasonal average temperature presented a significant increase trend,and the seasonal precipitation was conspicuous ascension in spring and winter.The spatio-temporal patterns of change in temperature and precipitation differed,with the southwest area showing the most obvious variation in each season.Abrupt changes in annual and seasonal average temperature and precipitation occurred mainly around the 1990 s and after 2000,respectively.Atmospheric circulation had an important effect on the trends and abrupt changes in temperature and precipitation.The East Asian summer monsoon had the largest impact on the trend of average annual temperature,as well as on the abrupt changes of annual average temperature and precipitation.Temperature and precipitation changes in the ASRC were influenced by long-term and short-term as well as direct and indirect anthropogenic and natural factors.This study identifies the characteristics of spatio-temporal variations in temperature and precipitation in the ASRC and provides a scientific reference for the formulation of climate change responses.

关键词： multi-source remote sensing data temperature precipitation arid and semiarid region spatio-temporal variation atmospheric circulation