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In Situ XPS Analysis of Tribo-chemical Behavior in Titanium Alloy Exposed to Fretting Wear Under the Vacuum Environments

Long, Jianjun (author), Wei, Xuejiao (author), Dong, Yiting (author), Cheng, Xixi (author), Li, Hao (author), Xu, X. (author), Zhu, Minhao (author)

A systematic experimental investigation concerning the fretting-induced tribo-chemical state and its effect on the fretting wear behavior of titanium alloys under the vacuum atmospheres (4 × 10^–3 Pa and 4 × 10^–1 Pa) in different fretting regimes is reported. An in situ XPS analysis tester was developed to capture the...

journal article 2024

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Effects of particle size distribution and blast velocity on furnace raceway transport behaviors and dynamic characteristics using DEM-CFD

Li, Meng (author), Li, Chao (author), Wu, Guanyin (author), An, Xizhong (author), Zhang, Hao (author), Fu, Haitao (author), Yang, Xiaohong (author), Zou, Qingchuan (author), Wu, Yongli (author), Dong, Kejun (author)

An in-depth exploration of the reaction kinetics and thermo-chemical behaviors of the raceway can offer practical insights for optimizing the operations of blast furnace (BF), thus achieving a more effective iron and steel production process. In this study, the dynamic characteristics and the flow, heat and mass transfer behaviors in the BF...

journal article 2024

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Artificial intelligence combined with high-throughput calculations to improve the corrosion resistance of AlMgZn alloy

Ji, Y. (author), Fu, Xiaoqian (author), Ding, Feng (author), Xu, Yongtao (author), He, Yang (author), Ao, Min (author), Xiao, Fulai (author), Chen, Dihao (author), Dey, P. (author), Qin, Wentao (author), Xiao, Kui (author), Ren, Jingli (author), Kong, Decheng (author), Li, Xiaogang (author), Dong, Chaofang (author)

Efficiently designing lightweight alloys with combined high corrosion resistance and mechanical properties remains an enduring topic in materials engineering. Due to the inadequate accuracy of conventional stress-strain machine learning (ML) models caused by corrosion factors, a novel reinforcement self-learning ML algorithm combined with...

journal article 2024

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Coupling Relationship between Rural Settlement Patterns and Landscape Fragmentation in Woodlands and Biological Reserves: A Case of Nanshan National Park

Li, Bo (author), Ouyang, Hao (author), Wang, T. (author), Dong, Tian (author)

Exploring the influence of settlement patterns on the landscape fragmentation in woodlands and biological reserves is key to achieving ecologically sustainable development. In this research, we chose the Nanshan National Park in Hunan Province, China, as a case study, to explore the influence mechanisms. First, we identified the biological...

journal article 2023

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Rheological behaviors and viscosity prediction model of cementitious composites with various carbon nanotubes

Li, Hongyan (author), Li, Z. (author), Qiu, Liangsheng (author), Dong, Sufen (author), Ouyang, Jian (author), Dong, Xufeng (author), Han, Baoguo (author)

This study aims to understand the effects and mechanisms of length, diameter, and functional group of carbon nanotubes (CNTs) on rheological behaviors of cementitious composites. The experimental results show that the addition of CNTs decreases the flow index and increases the critical shear rate of cementitious composites. CNTs with a sub...

journal article 2023

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Simultaneously Improved Bendability and Strength of Al–Mg–Si–Cu–Zn Alloys by Controlling the Formation and Evolution of Primary Fe-Rich Phase

Du, Jinqing (author), Li, G. (author), Guo, Mingxing (author), Lu, Wenyi (author), Dong, Qijuan (author), Zhuang, Linzhong (author)

In present work, the formation, evolution, and distribution of the primary Fe-rich phase in an Al–Mg–Si–Cu–Zn–Fe–Mn alloy are coupling controlled by ultrasonic melt treatment (USMT) and thermomechanical processing (TMP). It is shown in the results that the size of grains and Fe-rich phase in the as-cast state can be greatly reduced by the...

journal article 2023

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Robust Lane Detection Through Self Pre-Training With Masked Sequential Autoencoders and Fine-Tuning With Customized PolyLoss

Li, Ruohan (author), Dong, Y. (author)

Lane detection is crucial for vehicle localization which makes it the foundation for automated driving and many intelligent and advanced driving assistant systems. Available vision-based lane detection methods do not make full use of the valuable features and aggregate contextual information, especially the interrelationships between lane...

journal article 2023

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A General Hierarchical Control System to Model ACC Systems: An Empirical Study

Ruan, Tiancheng (author), Wang, Hao (author), Jiang, Rui (author), Li, Xiaopeng (author), Xie, N. (author), Xie, Xinjian (author), Hao, Ruru (author), Dong, Changyin (author)

Urged by a close future perspective of a traffic flow made of a mix of human-driven vehicles and automated vehicles (AVs), research has recently focused on studying the traffic flow characteristics of Adaptive Cruise Controls (ACCs), the most typical AV. However, in most works, the ACC system is studied under a simplifying and unrealistic...

journal article 2023

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Design of singularity-free fixed-time fault-tolerant control for HFVs with guaranteed asymmetric time-varying flight state constraints

Zuo, Renwei (author), Li, Yinghui (author), Lv, Maolong (author), Liu, Zongcheng (author), Dong, Zehong (author)

This article solves the fixed-time trajectory tracking problem for hypersonic flight vehicles (HFVs) encountered with diverse actuator faults and asymmetric envelope constraints. In contrast to the state of the art, the crucial characteristics of our design lie in obviating the explosion of complexity of the conventional recursive design, and...

journal article 2022

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Analysis the vortex ring state and propeller state of floating offshore wind turbines and verification of their prediction criteria by comparing with a CFD model

Dong, J. (author), Viré, A.C. (author), Li, Zhangrui (author)

In our previous study, the vortex ring state (VRS) prediction criteria were introduced from helicopter's realm and applied to floating offshore wind turbines (FOWTs). The existence of the VRS on FOWTs was also successfully predicted. However, the prediction criteria we used have not been verified by comparing them with similar studies because...

journal article 2022

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Nanomechanical Characteristics of Interfacial Transition Zone in Nano-Engineered Concrete

Wang, Xinyue (author), Dong, Sufen (author), Li, Z. (author), Han, Baoguo (author), Ou, Jinping (author)

This study investigates the effects of nanofillers on the interfacial transition zone (ITZ) between aggregate and cement paste by using nanoindentation and statistical nanoindentation techniques. Moreover, the underlying mechanisms are revealed through micromechanical modeling. The nanoindentation results indicate that incorporating...

journal article 2022

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Random forest incorporating ab-initio calculations for corrosion rate prediction with small sample Al alloys data

Ji, Y. (author), Li, Ni (author), Cheng, Zhanming (author), Fu, Xiaoqian (author), Sun, Xiaoguang (author), Chowwanonthapunya, Thee (author), Zhang, Dawei (author), Ren, Jingli (author), Dey, P. (author), Dong, Chaofang (author)

Corrosion jeopardizes the materials longevity and engineering safety, hence the corrosion rate needs to be forecasted so as to better guide materials selection. Although field exposure experiments are dependable, the prohibitive cost and their time-consuming nature make it difficult to obtain large dataset for machine learning. Here, we...

journal article 2022

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Effects of Ultrafine Blast Furnace Slag on the Microstructure and Chloride Transport in Cementitious Systems under Cyclic Drying–Wetting Conditions

Li, Wei (author), Yi, Liming (author), Jiang, Wen (author), Dong, H. (author), Zhang, Yong (author)

This paper presents experimental investigations into the effects of ultrafine blast furnace slag on microstructure improvements against chloride penetration in saturated and unsaturated cementitious systems exposed to cyclic drying–wetting conditions. The hydration kinetics of ultrafine slag powders and pore solution chemistry in slag-blended...

journal article 2022

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Future material requirements for global sustainable offshore wind energy development

Li, Chen (author), Mogollón, José (author), Tukker, Arnold (author), Dong, J. (author), von Terzi, D.A. (author), Zhang, Chunbo (author), Steubing, Bernhard (author)

Offshore wind energy (OWE) is a cornerstone of future clean energy development. Yet, research into global OWE material demand has generally been limited to few materials and/or low technological resolution. In this study, we assess the primary raw material demand and secondary material supply of global OWE. It includes a wide assortment of...

journal article 2022

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Fuzzy Adaptive Prescribed Performance Fault-Tolerant Control for HFVs with Fixed-Time Convergence Guarantee

Dong, Zehong (author), Li, Yinghui (author), Lv, Maolong (author), Zhao, Z. (author), Pei, Binbin (author)

A new fixed-time fuzzy adaptive fault-tolerant control methodology is proposed for the longitudinal dynamics of hypersonic flight vehicles (HFVs) in the presence of actuator faults, uncertain dynamics, and external disturbances. In contrast with the conventional fixed-time control schemes that typically contain the fractional powers of errors...

journal article 2022

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Moving Target Detection and Parameter Estimation via a Modified Imaging STAP with a Large Baseline in Multistatic GEO SAR

Dong, Xichao (author), Cui, Chang (author), Tian, Weiming (author), Li, Y. (author), Mounir, Melzi (author), Hu, Cheng (author)

With the development trends of multistatic spaceborne synthetic aperture radar (SAR), geosynchronous SAR (GEO SAR) employing several formation-flying small satellites also has great potential for remote sensing. The small satellites can cooperate to acquire multi-channel data for moving target detection and parameter estimation in strong...

journal article 2021

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Extrusion-based 3D printed magnesium scaffolds with multifunctional MgF₂and MgF₂-CaP coatings

Dong, J. (author), Tümer, N. (author), Putra, N.E. (author), Zhu, Jia-Ning (author), Li, Y. (author), Leeflang, M.A. (author), Taheri, P. (author), Fratila-Apachitei, E.L. (author), Mol, J.M.C. (author), Zadpoor, A.A. (author), Zhou, J. (author)

Additively manufactured (AM) biodegradable magnesium (Mg) scaffolds with precisely controlled and fully interconnected porous structures offer unprecedented potential as temporary bone substitutes and for bone regeneration in critical-sized bone defects. However, current attempts to apply AM techniques, mainly powder bed fusion AM, for the...

journal article 2021

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Fast calculation of carrier harmonic iron losses caused by pulse width modulation in interior permanent magnet synchronous motors

Zhu, Sa (author), Dong, J. (author), Li, Yanru (author), Hua, Wei (author)

Normal calculation of the carrier harmonic iron losses (CHILs) brought by the pulse width modulated (PWM) voltage source inverter in interior permanent magnet synchronous motors by the time-stepping finite-element analysis (TSFEA) with short time steps is very time-consuming. In this study, a novel method for fast calculation is proposed,...

journal article 2020

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Analytical Modeling of Misalignment in Axial Flux Permanent Magnet Machine

Guo, Baocheng (author), Huang, Yunkai (author), Peng, Fei (author), Dong, J. (author), Li, Yongjian (author)

This paper proposes an analytical model for the prediction of air gap magnetic field distribution for axial flux permanent magnet (AFPM) machine with various types of misalignments. The AFPM machine geometry is first transformed to a polar representation. Consequently, the subdomain model based on current sheet technique is developed. Then...

journal article 2020

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Formation design for single-pass GEO InSAR considering earth rotation based on coordinate rotational transformation

Chen, Zhiyang (author), Dong, Xichao (author), Li, Y. (author), Hu, Cheng (author)

The single-pass geosynchronous synthetic aperture radar interferometry (GEO InSAR) adopts the formation of a slave satellite accompanying the master satellite, which can reduce the temporal decorrelation caused by atmospheric disturbance and observation time gap between repeated tracks. Current formation design methods for spaceborne SAR are...

journal article 2020