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How do digital technologies improve supply chain resilience in the COVID-19 pandemic?

《工程管理前沿（英文）》 2023年 第10卷 第1期   页码 39-50 doi: 10.1007/s42524-022-0230-4

摘要： Digital technologies (DTs) can assist businesses in coping with supply chain (SC) disruptions caused by unpredictability, such as pandemics. However, the current knowledge of the relationship between DTs and supply chain resilience (SCR) is insufficient. This study draws on information processing theory to develop a serial mediation model to address this deficiency. We analyze a sample set consisting of 264 Chinese manufacturers. The empirical results reveal that digital supply chain platforms (DSCPs), as well as supply chain traceability (SCT) and supply chain agility (SCA), fully mediate the favorable association between DTs and SCR. Specifically, the four significant indirect paths indicated that firms can improve SCR only if they use DTs to directly or indirectly improve SCT and SCA (through DSCPs). Our study contributes to the literature on resilience by examining the possible mechanism of mediation through which DTs influence SCR. The findings also offer essential insights for firms to modify their digital strategies and thrive in a turbulent environment.

关键词： digital technologies     supply chain resilience     information processing theory     COVID-19     China    

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面向智慧能源系统的数字孪生技术及其应用

唐文虎,陈星宇,钱瞳,刘刚,李梦诗,李立浧

《中国工程科学》 2020年 第22卷 第4期   页码 74-85 doi: 10.15302/J-SSCAE-2020.04.010

摘要：

智慧能源战略为能源行业转型提供互联互通、透明开放、互惠共享的能源共享平台，数字孪生技术将助力解决智慧能源发展所面临的技术与市场壁垒问题。当前数字孪生技术在智慧能源行业应用仍处于起步阶段，相关的技术拓展和应用场景研究仍不充分，尚未形成系统性的研究框架。本文旨在总结国内外面向智慧能源系统的数字孪生技术的发展经验并探讨其未来发展思路，以期促进数字孪生技术在智慧能源行业中的深化应用。通过比较国内外不同领域对数字孪生技术的定义和应用，探讨了面向智慧能源系统的数字孪生技术的定义，对其通用架构、关键技术和生态构建分别进行了阐述。据此进一步分析了数字孪生技术在智慧能源行业的部署和应用案例。从技术发展、生态构建和政策建立三方面给出了对策建议，以期为数字孪生技术在智慧能源行业的工程应用提供参考。

关键词： 智慧能源系统，数字孪生，通用架构，能源系统生态    

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Platform governance in the era of AI and the digital economy

《工程管理前沿（英文）》 2023年 第10卷 第1期   页码 177-182 doi: 10.1007/s42524-022-0241-1

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Development trend of urban design in “digital age”: Pan-dimensionality and individual-ubiquity

《结构与土木工程前沿（英文）》 2021年 第15卷 第3期   页码 569-575 doi: 10.1007/s11709-021-0735-7

摘要： The wave of “digital age” featuring digital information is coming. Digital technology is profoundly changing the societal development direction and evolution paths. It also has significant bearing on production modes, social interactions and lifestyles. With regard to urban design, a system of knowledge about the creation and adaptation of material space forms that integrate humanities, art, technology and materials, digital technology has provided it with a brand-new and revolutionary scientific impetus for its evolution. The result of this evolution is “digital urban design paradigm based on human-computer interaction”, i.e., the urban development is moving toward “pan-dimensionality” and “individual ubiquity”. The future of urban design will construct a new approach to urban research and engineering, which is more complex, capable of accommodating and compatible with multiple goals of “instrumental rationality” and “value rationality”. Such a new approach shall be led by the probabilistic theory of “gray scale thinking”, reflecting quaternary synergetic view of “scientific rationality, ecological rationality, cultural rationality and technical rationality” to realize the cognitive progress of “engineering for the benefit of mankind”.

关键词： digital age     urban design     multiple objectives     human-computer interaction     pan-dimensionality     individual-ubiquity    

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Revisiting digital twins: Origins, fundamentals, and practices

《工程管理前沿（英文）》 2022年 第9卷 第4期   页码 668-676 doi: 10.1007/s42524-022-0216-2

摘要： The digital twins (DT) has quickly become a hot topic since it was proposed. It appears in all kinds of commercial propaganda and is widely quoted by academic circles. However, the term DT has misstatements and is misused in business and academics. This study revisits DT and defines it to be a more advanced system/product/service modeling and simulation environment that combines most modern information communication technologies (ICTs) and engineering mechanism digitization and characterized by system/product/service life cycle management, physically geometric visualization, real-time sensing and measurement of system operating conditions, predictability of system performance/safety/lifespan, and complete engineering mechanisms-based simulations. The idea of DT originates from modeling and simulation practices of engineering informatization, including virtual manufacturing (VM), model predictive control, and building information modeling (BIM). On the basis of the two-element VM model, we propose a three-element model to represent DT. DT does not have its unique technical characteristics. The existing practices of DT are extensions of the engineering informatization embracing modern ICTs. These insights clarify the origin of DT and its technical essentials.

关键词： virtual manufacturing     digital twins     modeling and simulation     digitization     computational engineering    

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Improve the industrial digital transformation through Industrial Internet platforms

《工程管理前沿（英文）》 2024年 第11卷 第1期   页码 167-174 doi: 10.1007/s42524-023-0286-9

摘要： Improve the industrial digital transformation through Industrial Internet platforms

关键词： industrial digital transformation     Industrial Internet platform     manufacturing     big data    

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Balancing resilience and efficiency in supply chains: Roles of disruptive technologies under Industry

《工程管理前沿（英文）》 2023年 第10卷 第1期   页码 171-176 doi: 10.1007/s42524-022-0247-8

摘要： In the Industry 4.0 era, disruptive technologies such as big data analytics, blockchain, Internet-of-Things, and additive manufacturing have become major forces driving supply chain transformation. Under such circumstances, particular attention should be attached to balancing resilience and efficiency of the supply chain, especially in the presence of more turbulence. In this study, we first summarize the conflicts between supply chain efficiency and supply chain resilience regarding practices and objectives. Then, we discuss the positive effects of disruptive technologies in improving resilience and efficiency. Afterwards, we propose a research agenda that covers both the influence mechanism and trade-off mechanism of these technologies in terms of resilience and efficiency.

关键词： disruptive technologies     supply chain     resilience     efficiency     paradox     balance    

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Examining the nexus of blockchain technology and digital twins: Bibliometric evidence and research trends

《工程管理前沿（英文）》 doi: 10.1007/s42524-024-0306-4

摘要： The integration of Blockchain Technology (BT) with Digital Twins (DTs) is becoming increasingly recognized as an effective strategy to enhance trust, interoperability, and data privacy in virtual spaces such as the metaverse. Although there is a significant body of research at the intersection of BT and DTs, a thorough review of the field has not yet been conducted. This study performs a systematic literature review on BT and DTs, using the CiteSpace analytic tool to evaluate the content and bibliometric information. The review covers 976 publications, identifying the significant effects of BT on DTs and the integration challenges. Key themes emerging from keyword analysis include augmented reality, smart cities, smart manufacturing, cybersecurity, lifecycle management, Ethereum, smart grids, additive manufacturing, blockchain technology, and digitalization. Based on this analysis, the study proposes a development framework for BT-enhanced DTs that includes supporting technologies and applications, main applications, advantages and functionalities, primary contexts of application, and overarching goals and principles. Additionally, an examination of bibliometric data reveals three developmental phases in cross-sectional research on BT and DTs: technology development, technology use, and technology deployment. These phases highlight the research field’s evolution and provide valuable direction for future studies on BT-enhanced DTs.

关键词： blockchain technology     digital twin     literature review     bibliometric analysis     research trend    

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Embracing digital mindsets to ensure a sustainable future

《环境科学与工程前沿（英文）》 2024年 第18卷 第3期 doi: 10.1007/s11783-024-1799-0

关键词： Wildlife     Climate Change     Heavy metals     Noise     LAN     Light pollution    

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Crack identification in concrete, using digital image correlation and neural network

《结构与土木工程前沿（英文）》 2024年 第18卷 第4期   页码 536-550 doi: 10.1007/s11709-024-1013-2

摘要： In engineering applications, concrete crack monitoring is very important. Traditional methods are of low efficiency, low accuracy, have poor timeliness, and are applicable in only a limited number of scenarios. Therefore, more comprehensive detection of concrete damage under different scenarios is of high value for practical engineering applications. Digital image correlation (DIC) technology can provide a large amount of experimental data, and neural network (NN) can process very rich data. Therefore, NN, including convolutional neural networks (CNN) and back propagation neural networks (BP), can be combined with DIC technology to analyze experimental data of three-point bending of plain concrete and four-point bending of reinforced concrete. In addition, strain parameters can be used for training, and displacement parameters can be added for comprehensive consideration. The data obtained by DIC technology are grouped for training, and the recognition results of NN show that the combination of strain and displacement parameters, i.e., the response of specimen surface and whole body, can make results more objective and comprehensive. The identification results obtained by CNN and BP show that these technologies can accurately identify cracks. The identification results for reinforced concrete specimens are less affected by noise than those of plain concrete specimens. CNN is more convenient because it can identify some features directly from images, recognizing the cracks formed by macro development. BP can issue early warning of the microscopic cracks, but it requires a large amount of data and computation. It can be seen that CNN is more intuitive and efficient in image processing, and is suitable when low accuracy is adequate, while BP is suitable for occasions with greater accuracy requirements. The two tools have advantages in different situations, and together they can play an important role in engineering monitoring.

关键词： digital image correlation     convolutional neural network     back propagation neural neural network     damage detection     concrete    

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Development of a novel two-stage proportional valve with a pilot digital flow distribution

Qiang GAO, Yuchuan ZHU, Changwen WU, Yulei JIANG

《机械工程前沿（英文）》 2021年 第16卷 第2期   页码 420-434 doi: 10.1007/s11465-020-0622-2

摘要： Pilot two-stage proportional valves are widely used in high-power hydraulic systems. For the purpose of improving the dynamic performance, reliability, and digitization of the traditional proportional valve, a novel two-stage proportional valve with a pilot digital flow distribution is proposed from the viewpoint of the dual nozzle-flapper valve’s working principle. In particular, the dual nozzle-flapper is decoupled by two high-speed on/off valves (HSVs). First, the working principle and mathematical model of the proposed valve are determined. Then, the influences of the control parameters (duty cycle and switching frequency) and structural parameters (fixed orifice’s diameter and main valve’s spring) on the main valve’s motion are analyzed on the basis of theory, simulation, and experiment. In addition, in optimizing the value of the fixed orifice’s diameter, a new design criterion that considers the maximum pressure sensitivity, flow controllability, and flow linearization is proposed to improve the balance between the effective displacement and the displacement fluctuation of the main valve. The new scheme is verified by simulations and experiments. Experimental results of the closed-loop displacement tracking have demonstrated that the delay time of the main valve is always within 3.5 ms under different working conditions, and the tracking error can be significantly reduced using the higher switching frequency. The amplitude–frequency experiments indicate that a ‒3 dB-frequency of the proposed valve can reach 9.5 Hz in the case of±50% full scale and 15 Hz in the case of 0%–50% full scale. The values can be further improved by increasing the flow rate of the pilot HSV.

关键词： two-stage proportional valve     digital flow distribution     high-speed on/off valve     position tracking characteristic     dynamic performance    

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A digital twin-enhanced collaborative maintenance paradigm for aero-engine fleet

《工程管理前沿（英文）》 2024年 第11卷 第2期   页码 356-361 doi: 10.1007/s42524-024-0299-z

摘要： Maintenance of aero-engine fleets is crucial for the efficiency, safety, and reliability of the aviation industry. With the increasing demand for air transportation, maintaining high-performing aero-engines has become significant. Collaborative maintenance, specifically targeting aero-engine fleets, involves the coordination of multiple tasks and resources to enhance management efficiency and reduce costs. Digital Twin (DT) technology provides essential technical support for the intelligent operation and maintenance of aero-engine fleets. DT maps physical object properties to the virtual world, creating high-fidelity, dynamic models. However, DT-enhanced collaborative maintenance faces various challenges, including the construction of complex system-layer DT models, management of massive integrated DT data, and the development of fusion mechanisms and decision-making methods for DT data and models. Overcoming these challenges will allow the aviation industry to optimize aero-engine fleet maintenance, ensuring safety, efficiency, and cost-effectiveness while meeting the growing demand for air transportation.

关键词： aero-engine fleet     collaborative maintenance     Digital Twin (DT)     complex system    

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A simple digital control algorithm for three phase shunt active filter: simulation and experimentation

Subbaraman SRINATH, Chandan KUMAR, M. P. SELVAN

《能源前沿（英文）》 2014年 第8卷 第1期   页码 119-128 doi: 10.1007/s11708-013-0288-0

摘要： A novel and simple control algorithm using digital signal processor (DSP) has been proposed and realized for a three phase shunt active filter (SAF). The simulation and prototype construction of SAF is conducted to compensate the reactive power and harmonics in a distribution system. The major feature of the proposed algorithm is that it does not require unit vector templates and any transformations for the reference current generation of SAF. This reduces the computational complexity and makes the control flexible and faster. The simulation is conducted in MATLAB/SIMULINK while DSP TMS320LF2407 is employed in the digital implementation of hysteresis current control (HCC) for experimentation. The hardware results correlate with the simulation results in reducing the total harmonic distortion (THD) of the source current and achieving unity power factor.

关键词： shunt active filter (SAF)     power quality     voltage source inverter (VSI)     digital signal processor (DSP)     total harmonic distortion (THD)     power factor improvement    

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Three-scale stochastic homogenization of elastic recycled aggregate concrete based on nano-indentation digital

Chen WANG, Yuching WU, Jianzhuang XIAO

《结构与土木工程前沿（英文）》 2018年 第12卷 第4期   页码 461-473 doi: 10.1007/s11709-017-0441-7

摘要： In this paper, three-scale stochastic elastic finite element analyses are made for recycled aggregate concrete (RAC) based on nano-indentation digital images. The elastic property of RAC contains uncertainties across scales. It has both theoretical and practical values to model and predict its mechanical performance. Based on homogenization theory, effective stochastic elastic moduli of RAC at three different scales are obtained using moving window technique, nano-indentation digital images, and Monte-Carlo method. It involves the generation of a large number of random realizations of microstructure geometry based on different volume fraction of the inclusions and other parameters. The mean value, coefficient of variation and probability distribution of the effective elastic moduli are computed considering the material multiscale structure. The microscopic randomness is taken into account, and correlations of RAC among five phases are investigated. The effective elastic properties are used to obtain the global behavior of a composite structure. It is indicated that the response variability can be considerably affected by replacement percentage of recycled aggregates.

关键词： RAC     nano-indentation digital image     multiscale     microscopic randomness     homogenization    

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标题 作者 时间 类型 操作

How do digital technologies improve supply chain resilience in the COVID-19 pandemic?

期刊论文

面向智慧能源系统的数字孪生技术及其应用

唐文虎,陈星宇,钱瞳,刘刚,李梦诗,李立浧

期刊论文

蒲天骄：Digital and Intelligent Key Technologies and Applications for New-Type Power System（2022年6月6日）

2022年07月07日

会议视频

Platform governance in the era of AI and the digital economy

期刊论文

Development trend of urban design in “digital age”: Pan-dimensionality and individual-ubiquity

期刊论文

Revisiting digital twins: Origins, fundamentals, and practices

期刊论文

Improve the industrial digital transformation through Industrial Internet platforms

期刊论文

Balancing resilience and efficiency in supply chains: Roles of disruptive technologies under Industry

期刊论文

Examining the nexus of blockchain technology and digital twins: Bibliometric evidence and research trends

期刊论文

Embracing digital mindsets to ensure a sustainable future

期刊论文

Crack identification in concrete, using digital image correlation and neural network

期刊论文

Development of a novel two-stage proportional valve with a pilot digital flow distribution

Qiang GAO, Yuchuan ZHU, Changwen WU, Yulei JIANG

期刊论文

A digital twin-enhanced collaborative maintenance paradigm for aero-engine fleet

期刊论文

A simple digital control algorithm for three phase shunt active filter: simulation and experimentation

Subbaraman SRINATH, Chandan KUMAR, M. P. SELVAN

期刊论文

Three-scale stochastic homogenization of elastic recycled aggregate concrete based on nano-indentation digital

Chen WANG, Yuching WU, Jianzhuang XIAO

期刊论文