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A critical assessment and summary on the low carbon energy pile technologies based on the life-cycle perspective: Challenges and prospects

Zhang, Linfeng (author), Han, Haozhe (author), Li, Wenxin (author), Guo, Kewei (author), Yuan, Minglu (author), Liu, Zhengxuan (author)

Energy piles, a technology integrating the heat exchange component within building pile foundations for shallow geothermal energy utilization, have proven economically efficient. They outperform conventional ground source heat pumps by mitigating additional borehole costs and space requirements. This paper systematically examines low-carbon...

journal article 2024

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BI-IEnKF coupling model for effective source term estimation of natural gas leakage in urban utility tunnels

Wu, Jiansong (author), Cai, Jitao (author), Liu, Z. (author), Yuan, S. (author), Bai, Yiping (author), Zhou, Rui (author)

As an effective way to facilitate the increasing demand for reliable infrastructure, energy supply and sustainable urban development, underground utility tunnels have been developed rapidly in recent years. Due to the widespread distribution of utility tunnels, the safe operation of natural gas pipelines accommodated in utility tunnels has...

journal article 2023

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Highly efficient carbon assimilation and nitrogen/phosphorus removal facilitated by photosynthetic O₂ from algal-bacterial aerobic granular sludge under controlled DO/pH operation

Li, Zejiao (author), Wang, Jixiang (author), Liu, Jialin (author), Chen, Xingyu (author), Lei, Zhongfang (author), Yuan, Tian (author), Lee, Duu Jong (author), Lin, Y. (author), van Loosdrecht, Mark C.M. (author)

Reducing CO₂ emission and energy consumption is crucial for the sustainable management of wastewater treatment plants (WWTPs). In this study, an algal-bacterial aerobic granular sludge (AGS) system was developed for efficient carbon (C) assimilation and nitrogen (N)/phosphorus (P) removal without the need for mechanical aeration....

journal article 2023

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Reverse Recovery Optimization of Multiepi Superjunction MOSFET Based on Tunable Doping Profile

Liu, Ke (author), Tan, C. (author), Li, Shizhen (author), Yuan, Wucheng (author), Liu, X. (author), Zhang, Kouchi (author), French, P.J. (author), Ye, H. (author), Wang, S. (author)

This paper proposes and simulates research on the reverse recovery characteristics of two novel superjunction (SJ) MOSFETs by adjusting the doping profile. In the manufacturing process of the SJ MOSFET using multilayer epitaxial deposition (MED), the position and concentration of each Boron bubble can be adjusted by designing different doping...

journal article 2023

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Modeling Pedestrian Tactical and Operational Decisions Under Risk and Uncertainty: A Two-Layer Model Framework

Huang, R. (author), Zhao, Xuan (author), Yuan, Y. (author), Yu, Qiang (author), Liu, Chengqing (author), Daamen, W. (author)

Pedestrian tactical choices and operational movement in evacuations essentially pertain to decision-making under risk and uncertainty. However, in microscopic evacuation models, this attribute has been greatly overlooked, even lacking a methodology to delineate the related decision characteristics (bounded rationality and risk attitudes), let...

journal article 2023

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Quantifying frequency containment reserve using cross-entropy frequency-constrained contingency-state-analysis model

Yuan, Yiping (author), Liu, Zhou (author), Chen, Zhe (author), Hoej Jensen, Kim (author), Popov, M. (author)

With the increasing penetration of converter-interfaced generators, the frequency containment reserve (FCR) from conventional generators keeps going down, leading to a potential risk of frequency instability under contingencies. Consequently, Converter-interfaced generators are required to provide FCR and participate in the corrective...

journal article 2023

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A conflict cluster-based method for collision avoidance decision-making in multi-ship encounter situations

Liu, Kezhong (author), Wu, Xiaolie (author), Zhou, Y. (author), Yuan, Zhitao (author), Yang, Xing (author), Xin, Xuri (author), Zhuang, Sujie (author)

During the process of collision avoidance, especially in a multi-ship encounter situation, the dynamic interactions among individual ships impose a significant impact on collision avoidance decision-making. It is imperative, therefore, that collision avoidance decisions are formulated with a comprehensive consideration of not only the current...

journal article 2023

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An integrated EDIB model for probabilistic risk analysis of natural gas pipeline leakage accidents

Chen, Xing lin (author), Lin, Wei dong (author), Liu, Chun xiang (author), Yang, Fu qiang (author), Guo, Yong (author), Li, Xin (author), Yuan, S. (author), Reniers, G.L.L.M.E. (author)

Natural gas pipeline construction is developing rapidly worldwide to meet the needs of international and domestic energy transportation. Meanwhile, leakage accidents occur to natural gas pipelines frequently due to mechanical failure, personal operation errors, etc., and induce huge economic property loss, environmental damages, and even...

journal article 2023

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Investigation on Transient Failure Mode of Asymmetric Trench Gate SiC MOSFET Under Single-Pulse Avalanche Stress

Wang, S. (author), Tan, Yanlong (author), Liu, Xu (author), Li, Shizhen (author), Liu, Ke (author), Yuan, Wucheng (author), Li, Tao (author), Zhang, Kouchi (author), French, P.J. (author), Ye, Huaiyu (author), Tan, Chunjian (author)

In this article, the avalanche withstand capability and transient failure model of commercial 1200 V asymmetric trench gate SiC MOSFETs are investigated by experiment and simulation under single-pulse unclamped inductive switching (UIS) conditions. The limiting avalanche current and limiting avalanche energy of the device are determined by...

conference paper 2023

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Evaluation of the fatigue properties for the long-term service asphalt pavement using the semi-circular bending tests and stereo digital image correlation technique

Cheng, Long (author), Zhang, Lei (author), Liu, X. (author), Yuan, Fang (author), Ma, Yang (author), Sun, Yinqing (author)

Reliable assessment of the fatigue resistance of asphalt pavement with a long-term service is critically crucial for the rational formulation of original pavement utilization strategies in reconstruction and expansion projects. Currently, the pavement performance evaluation indicators are mainly used to guide pavement preventive maintenance,...

journal article 2022

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Controllable Shrinking Fabrication of Solid-State Nanopores

Lei, Xin (author), Zhang, Jiayan (author), Hong, H. (author), Yuan, Zhishan (author), Liu, Zewen (author)

Nanopores have attracted widespread attention in DNA sequencing and protein or biomarker detection, owning to the single-molecule-scale detection accuracy. Despite the most use of naturally biological nanopores before, solid-state nanopores are widely developed with strong robustness, controllable sizes and geometries, a wide range of...

review 2022

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Lanthanide-doped NaYF₄ near-infrared-II nanothermometers for deep tissue temperature sensing

Yuan, Xiangyang (author), Cui, Endian (author), Liu, K. (author), Jiang, Ying (author), Yang, Xiaoyan (author), Tang, Jianfeng (author), Yang, Lu (author), Liao, Xiaoling (author), Zhao, Yanan (author)

In this work, different lanthanides (Tm³⁺, Er³⁺; Yb³⁺, Ho³⁺, Nd³⁺) were doped into NaYF₄ via a high-temperature coprecipitation method, and followed by SiO₂ coating to improve the water dispersibility, resulting in NaYF₄:Tm³⁺, Er³⁺...

journal article 2022

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Thickness-Independent Capacitive Performance of Holey Ti₃C₂T_x Film Prepared through a Mild Oxidation Strategy

Guo, R. (author), Yuan, Peng (author), Han, Xiying (author), He, Xuexia (author), Lu, Jiangbo (author), Li, Qi (author), Dang, Liqin (author), Sun, Jie (author), Liu, Zonghuai (author), Lei, Zhibin (author)

The Ti₃C₂T_x film with metallic conductivity and high pseudo-capacitance holds profound promise in flexible high-rate supercapacitors. However, the restacking of Ti₃C₂T_x sheets hinders ion access to thick film electrodes. Herein, a mild yet green route has been developed to...

journal article 2022

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EdgeTuner: Fast Scheduling Algorithm Tuning for Dynamic Edge-Cloud Workloads and Resources

Han, Rui (author), Wen, Shilin (author), Liu, Chi Harold (author), Yuan, Ye (author), Wang, Guoren (author), Chen, Lydia Y. (author)

Edge-cloud jobs are rapidly prevailing in many application domains, posing the challenge of using both resource-strenuous edge devices and elastic cloud resources. Efficient resource allocation on such jobs via scheduling algorithms is essential to guarantee their performance, e.g. latency. Deep reinforcement learning (DRL) is increasingly...

conference paper 2022

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Study on Reverse Recovery of a P-pillar Tunable Super-Junction MOSFET*

Liu, Ke (author), Yuan, Wucheng (author), Wang, S. (author), Tan, C. (author), Ye, H. (author)

In this paper, a novel bubble-shift super junction (SJ) MOSFET structure is proposed, and its main static electrical parameters and reverse recovery characteristics are simulated by TCAD software tool. By designing the P-pillar ion implantation windows with a certain offset, the bubble-shift SJ-MOSFET contains a curved pillar region in the upper...

conference paper 2022

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A TCAD Simulation Study on the Short-circuit Performance of 650V P-pillar Offset Super-junction MOSFET

Yuan, Wucheng (author), Liu, Ke (author), Wang, S. (author), Tan, C. (author), Ye, H. (author)

The limitation of Silicon based power MOSFET was broken by the super-junction (SJ) structure, which can provide lower specific on-resistance and higher breakdown voltage compared with the conventional power MOSFET structure. Multi-epitaxial and multi-ion-implant technology, as a mature manufacturing process of the SJ structure, has been widely...

conference paper 2022

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Graph Convolution-Based Deep Reinforcement Learning for Multi-Agent Decision-Making in Interactive Traffic Scenarios

Liu, Qi (author), Li, Z. (author), Li, Xueyuan (author), Wu, Jingda (author), Yuan, Shihua (author)

A reliable multi-agent decision-making system is highly demanded for safe and efficient operations of connected and autonomous vehicles (CAVs). In order to represent the mutual effects between vehicles and model the dynamic traffic environments, this research proposes an integrated and open-source framework to realize different Graph...

conference paper 2022

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Explorative Learning in Infrastructure Development Megaprojects: The Case of the Hong Kong-Zhuhai-Macao Bridge

Liu, Y. (author), Houwing, E.J. (author), Hertogh, M.J.C.M. (author), Yuan, Ziwei (author), Liu, Huimin (author)

Research on explorative learning has primarily focused on the organizational level. Not much research has been done at the megaproject level, which is a more complex form of organizing. Therefore, it is advisable to analyze how the pursuit of explorative learning is enabled at the megaproject level. This research draws upon the case study of...

journal article 2022

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Factors Influencing the Project Duration of Urban Village Redevelopment in Contemporary China

Yuan, Dinghuan (author), Yau, Yung (author), Hou, H. (author), Liu, Yongshen (author)

Project duration is one of the methods to measure the efficiency of project implementation. This study identifies the factors influencing the project duration of urban village redevelopment projects (UVRPs) in China. Based on the theory of new institutional economics and behavioral economics, this study develops three hypotheses regarding the...

journal article 2021

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Transformation towards a carbon-neutral residential community with hydrogen economy and advanced energy management strategies

He, Yingdong (author), Zhou, Yuekuan (author), Yuan, Jing (author), Liu, Zhengxuan (author), Wang, Zhe (author), Zhang, Guoqiang (author)

Cleaner power production, distributed renewable generation, building-vehicle integration, hydrogen storage and associated infrastructures are promising for transformation towards a carbon–neutral community, whereas the academia provides limited information through integrated solutions, like intermittent renewable integration, hydrogen sharing...

journal article 2021