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Exploring the Applications of Digital Twin Technology in Enhancing Sustainability in Civil Engineering:A Review

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Structural Durability & Health Monitoring 2024年第5期18卷 577-598页

作者： Jiamin Huang Ping Wu Wangxin Li Jun Zhang yidong xu School of Civil Engineering Chongqing Jiaotong UniversityChongqing400074China School of Civil Engineering and Architecture NingboTech UniversityNingbo315100China School of Civil Engineering Lanzhou University of TechnologyLanzhou730050China

With the advent of the big data era and the rise of Industrial Revolution 4.0,digital twins(DTs)have gained sig-niﬁcant attention in various *** offer the opportunity to combine the physical and digital worlds and aid the digital transformation of the civil engineering *** this paper,605 documents obtained from the search wereﬁrst analysed using CiteSpace for literature visualisation,and an author co-occurrence network,a keyword co-occurrence network,and a keyword clustering set were ***,through a literature review of 86 papers,this paper summarises the current status of DT application in civil engineering based on a review of the origins,concepts,and implementation techniques of DTs,and it introduces the application of DTs in the full project *** study shows that DTs have great potential to address many of the challenges faced by civil *** this regard,the paper also presents some thoughts on the future directions of DT research.

关键词： Digital twins civil engineering full lifecycle literature visualisation analysis

采用持久发光材料为内部光源的光催化复合材料研究进展

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材料导报 2024年第15期38卷 96-105页

作者：蔡心杰徐亦冬王玉全武金婷浙江大学建筑工程学院杭州310058 浙大宁波理工学院土木建筑工程学院浙江宁波315100

光催化材料和持久发光材料(LPLs)均是以太阳能为能量来源的清洁材料,其中光催化材料已在空气净化、医疗卫生、自清洁建材等领域获得显著的成果。目前,已有研究表明将LPLs作为光催化材料的内部光源可以进一步改进光催化材料的催化时长和... 详细信息

光催化材料和持久发光材料(LPLs)均是以太阳能为能量来源的清洁材料,其中光催化材料已在空气净化、医疗卫生、自清洁建材等领域获得显著的成果。目前,已有研究表明将LPLs作为光催化材料的内部光源可以进一步改进光催化材料的催化时长和效率,因此本文旨在总结现有关于持久发光-光催化复合材料的国内外研究进展:首先介绍了光催化材料及LPLs的种类;其次讨论了持久发光-光催化复合材料的复合条件、作用机理、合成方法;最后总结了持久发光-光催化复合材料的催化性能研究进展,并对未来的研究方向进行了展望。

关键词：光催化持久发光材料水泥基材料污染物降解

Cosmological parameter measurement and neutral hydrogen 21 cm sky survey with the Square Kilometre Array

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Science China(Physics,Mechanics & Astronomy) 2020年第7期63卷 122-123页

作者： yidong xu Xin Zhang Key Laboratory for Computational Astrophysics National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Department of Physics College of SciencesNortheastern UniversityShenyang 110819China

Through decades of continuous efforts by the whole community of cosmology, a standard cosmological model known as theΛcold dark matter (ΛCDM) model has been established,in which the total energy budget consists of 5%ordinary matter, 27%cold dark matter, and 68%dark energy described by a cosmological constantΛ, and the inflation process in the very early universe yielded adiabatic, Gaussian, nearly scale-invariant primordial density perturbations, and possibly detectable primordial gravitational waves.

关键词： universe budget gravitational

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基于电磁耦合的磁感应强度增益方法

仪表技术与传感器 2024年第8期 93-98页

作者：王子康尚文静王作帅徐以东贾佩松哈尔滨工程大学烟台研究院烟台大学物理与电子信息学院武汉第二船舶设计研究所

在水下金属探测领域,由于环境噪声的影响使得磁传感器对微弱磁信号的接收较为困难,为了进一步提高磁传感器对微弱磁信号的接收能力,利用电磁相互耦合的特性,通过将面积、匝数与电感满足一定条件的2个线圈串联作为磁传感器的前置磁场增... 详细信息

在水下金属探测领域,由于环境噪声的影响使得磁传感器对微弱磁信号的接收较为困难,为了进一步提高磁传感器对微弱磁信号的接收能力,利用电磁相互耦合的特性,通过将面积、匝数与电感满足一定条件的2个线圈串联作为磁传感器的前置磁场增益模块。首先,通过将外界磁场、探测线圈与增强线圈建立等效的电路模型,分析整个系统的场强增益,给出最终增益表达式;然后利用COMSOL软件对系统增益模型进行仿真验证;最后,通过实际绕制探测线圈与增强线圈进行实验验证。结果表明:文中提出的电磁耦合增强磁场方法可有效放大接收磁场的磁场强度,提升磁传感器对微弱磁信号的接收能力。

关键词：电磁耦合磁场增益磁传感器 COMSOL仿真

Undersea Buried Pipeline Reconstruction Based on the Level Set and Inverse Multiquadric Regularization Method

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Journal of Ocean University of China 2022年第1期21卷 101-112页

作者： SHANG Wenjing xuE Wei xu yidong MAKAROV Sergey B LI Yingsong College of Information and Communication Engineering Harbin Engineering UniversityHarbin 150001China Key Laboratory of Advanced Marine Communication and Information Technology Ministry of Industry and Information TechnologyHarbin 150001China Yantai Research Institute and Graduate School of Harbin Engineering University Yantai 264006China Institute of Physics Nanotechnology and TelecommunicationsHigher School of Applied Physics and Space TechnologiesPeter the Great St.Petersburg Polytechnic UniversitySt.Petersburg 195251Russia

The electric inversion technique reconstructs the subsurface medium distribution from acquired *** the basis of electric inversion,objects buried under the earth or seabed,such as pipelines and unexploded ordnance,are detected and located in a contactless ***,the process of accurately reconstructing the shape of the target object is challenging because electric inversion is a nonlinear and ill-posed *** this work,we present an inverse multiquadric(IMQ)regularization method based on the level set function for reconstructing buried *** the case of locating underwater objects,the unknown inversion area is split into two parts,the background and the pipeline with known *** geometry of the pipeline is represented based on the level set function for achieving a noiseless inversion *** obtain a binary image,the IMQ is used as the regularization term,which‘pushes’the level set function away from *** also provide an appropriate method to select the bandwidth and regularization parameters for the IMQ regularization term,resulting in reconstructed images with sharp *** simulation results and analysis show that the proposed method performs better than classical inversion methods.

关键词： inverse problems level set function inverse multiquadric regularization method buried pipeline

Influence of viscosity on the phase transformation of amorphous calcium carbonate in fluids:An understanding of the medium effect in biomimetic mineralization

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Science China Chemistry 2010年第10期53卷 2208-2214页

作者： XIE yidong, xu xuRong & TANG RuiKang Center for Biomaterials and Biopathways and Department of Chemistry, Zhejiang University, Hangzhou 310027, China Center for Biomaterials and Biopathways and Department of Chemistry Zhejiang University Hangzhou China

Biological mineral generation via an amorphous precursor is a topic of great current interest. Various factors such as the temperature, solution composition and presence of organic molecules can influence this important inorganic process. Here we demonstrate that this mineral transformation can actually readily be regulated by solution viscosity, a fundamental but often overlooked property. In our experiment, amorphous calcium carbonate (ACC), a key model compound in biomimetic mineralization studies, is synthesized and dispersed into inert dispersants with different viscosities and the crystallization process is examined by using FT-IR spectroscopy and XRD. It is found that the inhibition of the transformation of ACC becomes more significant with increasing fluid viscosity. This phenomenon can be explained by the differences in ion diffusion in different media. Furthermore, the resulting crystals always have different morphologies and size distributions although they all have the calcite structure. This study implies that the importance of the fluid medium cannot be ignored in building a complete understanding of biological control of biomimetic crystallizations.

关键词： mineralization amorphous calcium carbonate transformation viscosity

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结合自适应脉压与排列熵特征的陆海分割方法

海军航空大学学报 2024年第5期39卷 587-594页

作者：张鹏举黄勇张洪峰柳超耿伟智徐以东哈尔滨工程大学烟台研究院山东烟台264001 海军航空大学山东烟台264001 武汉第二船舶设计研究所湖北武汉430000

针对陆海交接处强陆地杂波距离旁瓣影响近岸海上目标检测的问题,提出了1种自适应脉冲压缩与排列熵特征提取相结合的陆海分割方法。首先,采用两级相位补偿的自适应脉冲压缩技术,抑制近岸强地物杂波距离旁瓣对陆海分割的影响;随后,利用每... 详细信息

针对陆海交接处强陆地杂波距离旁瓣影响近岸海上目标检测的问题,提出了1种自适应脉冲压缩与排列熵特征提取相结合的陆海分割方法。首先,采用两级相位补偿的自适应脉冲压缩技术,抑制近岸强地物杂波距离旁瓣对陆海分割的影响;随后,利用每个距离方位分辨单元中的观测数据计算该单元的排列熵,该特征显著增强了地物回波与海面回波的对比度;最后,利用大津法图像分割和形态学处理等数字图像处理技术,提取出陆海分界线。实测数据处理结果表明,自适应脉冲压缩与排列熵特征提取相结合,能够有效提升陆海回波的对比度,保证了陆海分界线提取的准确性。

关键词：陆海分割自适应脉冲压缩排列熵数字图像处理

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氧化石墨烯对水泥基复合材料徐变的调控机制

复合材料学报 2022年第10期39卷 4839-4846页

作者：徐亦冬王瑶浙大宁波理工学院土木建筑工程学院宁波315100 江苏科技大学土木工程与建筑学院镇江212100

为了探明氧化石墨烯(GO)对水泥基复合材料徐变的调控机制,采用徐变加载架对不同GO掺量水泥胶砂的徐变进行了测试,并从水泥基复合材料的水化和微观结构入手,采用SEM、XRD、FTIR等研究了GO对水泥胶砂徐变的影响,并对调控机制进行了解释。... 详细信息

为了探明氧化石墨烯(GO)对水泥基复合材料徐变的调控机制,采用徐变加载架对不同GO掺量水泥胶砂的徐变进行了测试,并从水泥基复合材料的水化和微观结构入手,采用SEM、XRD、FTIR等研究了GO对水泥胶砂徐变的影响,并对调控机制进行了解释。结果表明:GO可以调节水泥基复合材料水化产物的形状与聚集态,降低宏观徐变。当GO掺量(与水泥质量比)大于0.02%时,水泥胶砂的徐变大幅度降低。GO的掺入促进了水化硅酸钙(CSH)对水分子的吸附与扩散,增加了内部CSH含量,使水化产物的结构更加致密。GO与CSH形成的氢键可提升二者之间的黏结力,并增强水分子在CSH-GO片层间的吸附,从而实现了对水泥胶砂徐变的调控。研究成果对于实现按终端用途进行水泥基复合材料设计具有重要的理论价值,并有望在预应力混凝土结构中得到应用。

关键词：水泥基复合材料氧化石墨烯水化产物微观结构徐变调控机制

MnTe_(2) as a novel promising thermoelectric material

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Journal of Materiomics 2018年第3期4卷 215-220页

作者： yidong xu Wen Li Chen Wang Zhiwei Chen Yixuan Wu Xinyue Zhang Juan Li Siqi Lin Yue Chen Yanzhong Pei Interdisciplinary Materials Research Center School of Materials Science and EngineeringTongji Univ.4800 Caoan Rd.Shanghai201804China Department of Mechanical Engineering The University of Hong KongPokfulam RoadHong Kong SARChina

Semiconducting manganese ditelluride(MnTe_(2))crystalizes in a high symmetry cubic structure with sufficient band gap and consists of nontoxic elements only,therefore is focused on in this work for its potential thermoelectric *** material intrinsically comes with a very low hole concentration of 10^(19)cm^(-3),which can be successfully increased to 4×10^(20)cm^(-3)through Ag-doping at Mn *** a broad carrier concentration enables an effective optimization on thermoelectric power factor,and the doping process effectively reduces the lattice thermal conductivity down to~0.5 W/m-K due to the phonons scattered by additional point *** a result,a peak zT of~0.7 is obtained in p-type ***,the SPB model with acoustic scattering estimates the electronic properties well,which also enables insight into the underlying physical parameters related to the thermoelectric ***,band structure calculation suggests a potentially higher thermoelectric performance for n-type conduction due to both higher band degeneracy and lower band effective *** work reveals MnTe_(2)is a novel promising thermoelectric material.

关键词： MnTe_(2) Thermoelectric SPB Transport properties