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2020 Global reliability and Prognostics and Health Management, PHM-Shanghai 2020

作者： Li, Yifan Chen, Haitao Huang, Jun Li, Xiang Zhang, Ting-Yu Huang, Hong-Zhong School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu Sichuan611731 China Center for System Reliability and Safety University of Electronic Science and Technology of China Chengdu Sichuan611731 China Shanghai Institute of Space Power-sources No. 2965 Dongchuan Road Minhang Shanghai200245 China State Key Laboratory of Space Power-sources Technology No.2965 Dongchuan Road Minhang Shanghai200245 China

ISBN: (纸本)9781728159454

As the core foundation for naval strategic transformation and mission accomplishment, the command and control system is a complex electronic information system involving multiple elements, such as command and control, intelligence reconnaissance, early warning detection, communication and navigation, electronic countermeasures, integrated support, and combat personnel. With the transformation of naval strategic tasks, the command and control system has gradually evolved from a traditional single command and control to a multi-functional integrated system, which has raised a number of problems and challenges for the reliability design of the command and control system. This paper aims to provide efficient reliability allocation and accurate prediction for command and control system according to the structure of shipborne electronic information system. © 2020 IEEE.

关键词： Command and control systems

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A review of research on traffic conflicts based on intelligent vehicles perception technology 7

A review of research on traffic conflicts based on intellige...

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7th International Conference on Advances in Construction Machinery and Vehicle engineering, ICACMVE 2019

作者： Hu, Yezi Ou, Jian Hu, Lin School of Automotive and Mechanical Engineering Changsha University of Science and Technolgy Changsha410114 China Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and Technology Changsha410114 China

ISBN: (纸本)9781728139050

The traffic situation at the urban intersection is complicated, the numerous internal conflict, kinds of and frequent accidents. With the objective to improve road safety, the automotive industry is moving toward more intelligent vehicles. One of the major challenges is accurately perceive the road traffic environment, detect potential driving conflicts before vehicle conflicts occur and propose alternative driving strategies to resolve conflicts. This paper summarizes the existing research on traffic conflict based on Intelligent Vehicle perception technology. Intelligent vehicles perceive the surrounding environment through environment perception technology, mainly rely on vehicle-borne sensing systems, such as vision system, radar system, etc. to obtain the surrounding road environment information, and detect obstacles to avoid collision and other measures to avoid conflict or reduce accidents. And through prediction algorithm, traffic risk assessment is carried out. At the same time, the existing technical problems are analyzed. Finally, the future development trend of this field is proposed. © 2019 IEEE.

关键词： Optical radar

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3D reconstructing of arbitrary defects with magnetic flux leakage testing signals

3D reconstructing of arbitrary defects with magnetic flux le...

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2020 IEEE Far East Forum on Nondestructive Evaluation/Testing: New technology and Application, FENDT 2020

作者： Li, Hong-Mei Huang, Ran-Ran Zhao, Chun-Tian Yan, Jia Wang, Yu College of Architecture and Environment Sichuan University Chengdu610207 China Weihai Huateng Offshore Engineering Technology Co. Ltd Weihai264400 China Advanced Interdisciplinary Studies Ocean-X Program Southern University of Science and Technology Shenzhen518055 China Nondestructive Testing and Structural Reliability Evaluation Laboratory North Minzu University Yinchuan750021 China

ISBN: (纸本)9781665440820

By detecting and processing the Magnetic Flux Leakage (MFL) signals to identify and estimate the defects in ferromagnetic materials or structures, for example, in the steel pipelines, the so called Magnetic Flux Leakage Testing (MFLT) technology has been widely used in industry. However, the existing MFLT technology is suitable for locating the defects and rough estimating their sizes based on enormous sample data, incapable to image their Three-Dimensional (3D) shapes and precise estimate their sizes, while the physical model associating the defect geometry details and the MFL signals were still unclear. In this study, (1) the effects of an actual 3D defect are taken into account by introducing a new concept, Depth Field over a surface, i.e., a matrix of loss of material on the testing surface of a structure;(2) the governing equations for the depth field and the MFL signals are derived;(3) an algorithm to reconstruct the 3D defect or the depth field based on the governing equations is developed. This new method does not require huge amount of pulling-test data for calibration purpose as the existing MFLT technology used in industry, and it has been verified via a series of tests with various defects of different shapes in pipelines, the results indicate it is valid for 3D defect reconstruction with high accuracy. © 2020 IEEE.

关键词： Ferromagnetic materials

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Intelligent corrosion detection and rating based on faster region-based convolutional neural network

Intelligent corrosion detection and rating based on faster r...

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Prognostics and System Health Management Conference (PHM-Qingdao)

作者： Xuebing Xu Yuanhang Wang Jun Wu Yanzhi Wang School of Naval Architecture and Ocean Engineering Huazhong University of Science and Technology Wuhan China Guangdong Provincial Key Laboratory of Electronic Information Products Reliability Technology Guangzhou China

The following topics are dealt with: condition monitoring; mechanical engineering computing; fault diagnosis; reliability; maintenance engineering; remaining life assessment; learning (artificial intelligence); produc... 详细信息

ISBN: (数字)9781728159461

ISBN: (纸本)9781728159478

关键词： Corrosion Metals Convolutional neural networks reliability Prognostics and health management Surface treatment Monitoring

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Topological electride Hf2Se: Enhanced hydrogen evolution reaction activity from nontrivial topological Fermi arc

EcoEnergy

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EcoEnergy 2024年

作者： Weizhen Meng Jiayu Jiang Hongbo Wu Yalong Jiao Xiaoming Zhang Zhenxiang Cheng Xiaotian Wang Hebei Key Laboratory of Photophysics Research and Application College of Physics Hebei Normal University Shijiazhuang China State Key Laboratory of Reliability and Intelligence of Electrical Equipment and School of Materials Science and Engineering Hebei University of Technology Tianjin China Institute for Superconducting and Electronic Materials Faculty of Engineering and Information Sciences University of Wollongong Wollongong New South Wales Australia

Recently, the emergence of topological electride catalysts has attracted significant attention in the fields of condensed matter physics, chemistry, and materials science. In this study, we found that electride Hf 2 Se exhibits various types of topological quantum states under the constraint of symmetric operations, particularly the Weyl point (WP) located at the K valley. The WP is closely aligned with the Fermi level and generates an extensive Fermi arc surface state on the (001) surface. In addition, electride Hf 2 Se exhibits a lower work function on the (001) surface. Remarkably, electride Hf 2 Se exhibits extremely high stability in both air and water environments. The catalytic activity of electride Hf 2 Se for hydrogen evolution reaction (HER) was significantly improved by utilizing its robust surface state and low work function. Therefore, we provide a new insight into the application of electrides in HER.

关键词： inorganic electrides topological catalysis topological semimetals

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Improved response surface method based on triple weighted regression

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IOP Conference Series: Materials science and engineering 2021年第4期1043卷

作者： Jie Wu Jianguo Zhang Lingfei You Nan Ye School of Reliability and Systems Engineering Beihang University Beijing China Science and Technology on Reliability and Environmental Engineering Laboratory Beihang University Beijing China

The response surface method (RSM) is frequently used to reduce the computational burden of structural reliability analysis. In this paper, an improved RSM is proposed. The response surface is fitted by the triple weighted regression technique, which integrates weighting systems to assign weight factors to each sampling point including (1) the absolute value of the limit state function (LSF), (2) the value of the joint probability density function and (3) the distance from the design point. Numerical examples are presented to demonstrate that the proposed method gives more accurate results than RSM for both probability of failure (PoF) and LSF evaluations.

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Correction: Expanded graphite incorporated with Li4Ti5O12 nanoparticles as a high-rate lithium-ion battery anode

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RSC advances 2024年第22期14卷 15776页

作者： Junkang Zhao Xiayu Zhu Wenfeng Zhang Jingyi Qiu Feiyue Zhai Huimin Zhang Gaoping Cao Shengji Gao Fei Ding Yu Xiang Engineering and State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Materials Science and Engineering Hebei University of Technology Tianjin 300401 China hilldingfei@***. Chemical Defense Institute Academy of Military Sciences Beijing 100191 China drxiangyu2016@***. Beijing Key Laboratory of Advanced Chemical Energy Storage Technology and Materials Beijing 100191 China. Beihang University Beijing 100191 China.

[This corrects the article DOI: 10.1039/D4RA00832D.].

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A node-centric network congestion estimation method considering average spatiooral scale 2

A node-centric network congestion estimation method consider...

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2nd International Conference on Computer Information science and Application technology, CISAT 2019

作者： Wen, Guoyi Huang, Ning Zhu, Juxing School of Air Technical Sergeant Air Force Engineering University Xinyang Henan464000 China School of Reliability and Systems Engineering Beihang University Beijing100191 China Key Laboratory of Science and Technology on Reliability and Environmental Engineering Beihang University Beijing100191 China

Congestion estimation is a significant issue to analyse and mitigate network congestion. Many researchers have used various estimation methods based on the load data of roads in a single moment. However, congestion is always node-centric and formed around intersections gradually. An estimation method to describe the average congestion around intersections or nodes is also valuable and needed to discover the most congested parts but is absent according to our literature researches. In this paper, we propose a node-centric network congestion method, which can evaluate the average spatiooral congestion scale around nodes. Based on the widely used simulation platform NetLogo, the simulation results have proved the reasonability of the proposed estimation method by the stable values of the fixed traffic network intersections, which becomes increasingly stable as time goes on, and it is found that the node-centric values calculated by our estimation method is more stable than the values by the edge-centric because of its superiority. This node-centric network congestion estimation method considering average spatiooral scale will be widely used because of its simplicity and universality. © Published under licence by IOP Publishing Ltd.

关键词： Simulation platform

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The impact of large constellations on space debris environment and its Countermeasures 70

The impact of large constellations on space debris environme...

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70th International Astronautical Congress, IAC 2019

作者： Chen, Chuan Yang, Wulin Gong, Zizheng Li, Ming Beijing Institute of Spacecraft Environment Engineering Beijing100094 China National Key Laboratory of Science and Technology on Reliability and Environment Engineering Beijing100094 China China Academy of Space Technology Beijing100094 China

ISBN: (纸本)9781713814801

Large constellations have developed rapidly in recent years because of their unique advantages, but they will inevitably have a huge negative impact on the existing space debris environment. According to the existing research results, large constellations will inevitably lead to the deterioration of space debris environment. The key to mitigate the impact is the success rate and time of the post-mission disposal process. Aiming at this problem, this paper further studies the impact of large constellations on other space targets under different PMD strategies through simulation calculation, and puts forward corresponding strategies and suggestions. According to Oneweb's large constellation launch operation plan, the dangerous intersection of large constellation with existing space targets in different stages of its life cycle is calculated by *** on this, the influence of large constellation operation on existing space targets under different time and strategy of PMD is analyzed. The conclusion shows that the stage of PMD is the stage in which large constellations have the greatest impact on existing space targets;the speed of PMD and number of satellites performing PMD at the same time are the key factors to the degree of the negative impact;The faster the PMD is, the less threat it poses to other spacecraft. More results and conclusions are still being analyzed and calculated. Copyright © 2019 by the International Astronautical Federation (IAF). All rights reserved.

关键词： Space debris

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Mechanically exfoliated single-phase 2D Ruddlesden-Popper (PA) 2 MA n−1 Pb n Br 3n+1 (n = 1, 2, 3, and 4) perovskites

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Materials Letters 2025年 398卷

作者： Natarajan Thirugnanam Huanfeng He Yunbin He Debesh Devadutta Mishra Cher Ming Tan Ministry of Education Key Laboratory of Green Preparation and Application for Functional Materials Hubei Key Lab of Ferro & Piezoelectric Materials and Devices Hubei Key Laboratory of Polymer Materials School of Materials Science & Engineering Hubei University Wuhan 430062 China Center for Reliability Sciences and Technologies Chang Gung University Taoyuan 333 Taiwan Department of Electronic Engineering College of Engineering Chang Gung University Taoyuan 333 Taiwan Department of Radiation Oncology Chang Gung Memorial Hospital Taoyuan 333 Taiwan Center for Reliability Engineering Ming Chi University of Technology New Taipei City 243 Taiwan

Two-dimensional (2D) Ruddlesden-Popper (RP) multilayered Organic-Inorganic Hybrid Perovskites (OIHPs) in the structural form of (PA) 2 MA n-1 Pb n Br 3n+1 (n = 1, 2, 3, and 4) were synthesized by temperature cooling crystallization method. Subsequently, the synthesized 2D RP OIHPs were mechanically exfoliated to obtain in single-phase. Their crystallinity and thickness were studied by X-ray diffraction (XRD). Interestingly, the thickness determined from XRD matches with atomic force microscopy(AFM) results. Further, the optical properties of 2D RP OIHPs were tuned with its layer thickness. Our results provide a foundation for future research into the synthesis of single-phase 2D RP multilayered OIHPs with different bulky organic cations as spacers.

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