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International Conference on Guidance, Navigation and Control, ICGNC 2022

作者： Zhao, Zhengduo Ma, Liang Liu, Jia Su, Xuanyuan Tao, Laifa Institute of Reliability Engineering Beihang University Beijing100191 China Science and Technology Laboratory on Reliability and Environmental Engineering Beihang University Beijing100191 China School of Reliability and Systems Engineering Beihang University Beijing100191 China The Fifth Electronic Research Institute of Ministry of Industry and Information Technology Guangzhou511370 China

ISBN: (纸本)9789811966125

Due to the harsh working condition, effective fault diagnosis of aircrafts’ hydraulic systems is necessary to ensure their safety and reliability. In the ideal scenarios with rich failure data, deep learning (DL)-based methods generally achieve the satisfied fault diagnosis thanks to their remarkable capability of adaptive feature learning. However, the problem of missing data is quite common for the practical hydraulic systems, which means that it is hard to collect the sufficient failure samples to training these deep models. It thus severely limits their applications in practices. Aiming at the missing data problem of hydraulic systems, this paper provides a novel two-stage model named frequency-domain generative adversarial convolution neural networks (FGCN), to improve their fault diagnosis ability under the limited failure samples. In the first stage, a unique generative adversarial block is designed to generate the high-quality data considering characteristics of signals’ frequency domain. In the second stage, with the help of the augmented failure samples, the convolution block is fully trained to capture the intrinsic representations of hydraulic systems. The proposed method is validated by the dataset of real hydraulic pumps with missing data. The experimental results show that our proposed method based on FGCN improve the diagnostic accuracy by 13% compared with the mainstream DL-based ones, which reveal its superior performance for the fault diagnosis limited by the missing data. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Failure analysis

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An effective strategy of constructing multi-metallic oxides of ZnO/ CoNiO_(2)/CoO/C microflowers for improved supercapacitive performance

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Chinese Journal of Chemical engineering 2024年第3期67卷 1-8页

作者： Wei Guo Yan Zhang Xiaxin Lei Shuang Wang College of Physics Taiyuan University of TechnologyJinzhong 030600China College of Environmental Science and Engineering Taiyuan University of TechnologyJinzhong 030600China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan University of TechnologyTaiyuan 030024China

In this work,a new ZnO/CoNiO_(2)/CoO/C metal oxides composite is prepared by cost-effective hydrothermal method coupled with annealing process under N_(2) ***,the oxidation-defect annealing environment is conducive to both morphology and component of the composite,which flower-like ZnO/CoNiO_(2)/CoO/C is *** from good chemical stability of ZnO,high energy capacity of CoNiO_(2) and CoO and good conductivity of C,the as-prepared sample shows promising electrochemical behavior,including the specific capacity of 1435 C·g^(-1) at 1 A·g^(-1),capacity retention of 87.3%at 20 A·g^(-1),and cycling stability of 90.5%for 3000 cycles at 5 A·g^(-1),***,the prepared ZnO/CoNiO_(2)/CoO/C/NF//AC aqueous hybrid supercapacitors device delivers the best specific energy of 55.9 W·h·kg^(-1) at 850 W·kg^(-1).The results reflect that the as-prepared ZnO/CoNiO_(2)/CoO/C microflowers are considered as high performance electrode materials for supercapacitor,and the strategy mentioned in this paper is benefit to prepare mixed metal oxides composite for energy conversion and storage.

关键词： Composites Electrochemistry Hydrothermal Transition metal oxides Structural control Supercapacitors

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Initiating High-Voltage Multielectron Reactions in NASICON Cathodes for Aqueous Zinc/Sodium Batteries

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Energy Material Advances 2023年第1期4卷 426-437页

作者： Jiasheng Yue Shuqiang Li Shi Chen Jingjing Yang Xueying Lu Yu Li Ran Zhao Chuan Wu Ying Bai Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081PR China Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019PR China

Sodium superionic conductor(NASICON)is a class of compounds with robust polyanionic frameworks and high thermal stability,which are regarded as prospective cathodes candidates for secondary ***,NASICON cathodes typically have low discharge plateaus and low practical capacities in aqueous ***,Na_(3)V_(1.75)Fe_(0.25)(PO_(4))_(2)F_(3) is investigated as a cathode material for the aqueous zinc/sodium *** the addition of F helps with the improvement of NASICON structural stability,the low-cost Fe substitution has a positive impact on the capacity increment,reaction voltage increases,and cycling stability *** the Fe^(3+)substitution could induce a change in the spin magnetic moments of the 3d orbitals of the VO_(4)F_(2) and FeO_(4)F_(2) octahedra,the 2-electron reaction of V is activated,which are V^(4+)/V^(3+)and V^(5+)/V^(4+)redox *** a result,the novel Na_(3)V_(1.75)Fe_(0.25)(PO_(4))_(2)F_(3) cathode delivers a high operating voltage of 1.7 V,a high energy density of 209 W·h·kg^(−1) and stable lifespan(83.5%capacity retention after 6,000 cycles at 1 A·g^(−1))in the aqueous zinc/sodium *** research demonstrates the practicality of activating multielectron reactions to optimize the electrochemical properties of NASICON cathodes for aqueous secondary batteries.

关键词： stability substitution increment

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Typhoon-Induced Ocean Waves and Stokes Drift:A Case Study of Typhoon Mangkhut(2018)

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China Ocean engineering 2024年第4期38卷 711-724页

作者： WU Zhi-yuan GAO Kai CHEN Jie ZHANG Hao-jian DENG Bin JIANG Chang-bo LIU Yi-zhuang LYU Zhao YAN Ren School of Hydraulic and Environmental Engineering Changsha University of Science&TechnologyChangsha 410114China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210024China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China School of Civil Engineering Hunan University of TechnologyZhuzhou 412007China

Ocean waves and Stokes drift are generated by *** study investigated the characteristics of ocean waves and wave-induced Stokes drift and their effects during Typhoon Mangkhut using European Centre for MediumRange Weather Forecasts(ECMWF)ERA5 datasets and observational *** results revealed that the typhoon generated intense cyclones and huge typhoon waves with a maximum wind speed of 45 m/s,a minimum pressure of955 h Pa,and a maximum significant wave height of 12 *** Stokes drift caused by typhoon waves exceeded 0.6m/s,the Stokes depth scale exceeded 18 m,and the maximum Stokes transport reached 6 m^(2)/*** spatial distribution of 10-m wind speed,typhoon wave height,Stokes drift,Stokes depth,and Stokes transport during the typhoon was highly correlated with the typhoon *** distribution along the typhoon track showed significant zonal asymmetry,with greater intensity on the right side of the typhoon track than on the left *** findings provide important insights into the impact of typhoons on ocean waves and Stokes drift,thus improving our understanding of the interactions between typhoons and the ocean *** study also investigated the contribution of Stokes transport to the total net transport during typhoons using Ekman-Stokes Numbers as a comparative *** results indicated that the ratio of Stokes transport to the total net transport reached up to 50%within the typhoon radius,while it was approximately 30%outside the *** Stokes transport induced by typhoon waves led to divergence in the transport direction,which resulted in upwelling of the lower ocean as a compensation ***,Stokes transport played a crucial role in the vertical mixing of the ocean during *** findings suggested that Stokes transport should be paid more attention to,particularly in high latitude ocean regions,where strong winds can amplify its effects.

关键词： Stokes drift typhoon waves Ekman-Stokes transport vertical mixing Typhoon Mangkhut

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Li-promoted C_(3)N_(4) catalyst for efficient isomerization of glucose into fructose at 50℃ in water

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Green Energy & Environment 2024年第9期9卷 1419-1426页

作者： Wang Liu Yanfei Zhang Mengya Sun Xinpeng Zhao Shenggang Li Xinqing Chen Liangshu Zhong Lingzhao Kong CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201210China University of Chinese Academy of Sciences Beijing100049China School of Physical Science and Technology Shanghai Tech UniversityShanghai201203China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhouJiangsu215009China

Efficient and selective glucose-to-fructose isomerization is a crucial step for production of oxygenated chemicals derived from sugars,which is usually catalyzed by base or Lewis acid heterogeneous ***,high yield and selectivity of fructose cannot be simultaneously obtained under mild conditions which hamper the scale of application compared with enzymatic ***,a Li-promoted C_(3)N_(4) catalyst was exploited which afforded an excellent fructose yield(40.3 wt%)and selectivity(99.5%)from glucose in water at 50℃,attributed to the formation of stable Li–N bond to strengthen the basic sites of ***,the so-formed N_(6)–Li–H_(2)O active site on Li–C_(3)N_(4) catalyst in aqueous phase changes the local electronic structure and strengthens the deprotonation process during glucose isomerization into *** superior catalytic performance which is comparable to biological pathway suggests promising applications of lithium containing heterogeneous catalyst in biomass refinery.

关键词： Glucose Fructose Isomerization Li–C_(3)N_(4) Density functional theory calculations

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A gradient solid electrolyte interphase with high Li+conductivity induced by bisfluoroacetamide additive for stable lithium metal batteries

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Nano Research 2023年第6期16卷 8425-8432页

作者： Zhaoyang Sun Ziyue Wen Yi Chen Yue Ma Jinxiang Zhang Yuejiao Li Li Li Renjie Chen Beijing Key Laboratory of Environmental Science and Engineering School of Material Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Institute of Advanced Technology Beijing Institute of TechnologyJinan 250300China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Stable Li metal anodes have become the driving factor for high-energy-density battery ***,uncontrolled growth of Li dendrite hinders the application of rechargeable Li metal batteries(LMBs).Here,a multifunctional electrolyte additive bisfluoroacetamide(BFA)was proposed to facilitate high-performance *** uniform and dense deposition of Li^(+) was achieved due to the reduced nucleation and plateau overpotential by the addition of ***,X-ray photoelectron spectroscopy(XPS)tests reveal a gradient solid electrolyte interface(SEI)structure on the Li metal *** voltammetry(CV)curves at different sweep speeds prove the formation of pseudocapacitance at the electrode-electrolyte interface,which accelerates the Li+transport rate and protects the electrode *** low activation energy also indicates the ability of rapid Li^(+) transportation in electrolyte ***,the Li||Li symmetric cells with 1.0 wt.%BFA electrolyte exhibit good cycling performance at 0.5 mA·cm^(−2)for over 2000 h,and Li||LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM622)full cells maintain a high capacity for 200 cycles at 1 C rate.

关键词： electrolytes additives solid electrolyte interphase Li dendrites Li metal batteries

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Diminishing ether-oxygen content of electrolytes enables temperature-immune lithium metal batteries

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science China Chemistry 2023年第9期66卷 2700-2710页

作者： Tao Liu Jingnan Feng Zhe Shi Huajun Li Weina Zhao Minglei Mao Xiangzhen Zhu Yong-Sheng Hu Hong Li Xuejie Huang Liquan Chen Liumin Suo Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Department of Nuclear Science and Engineering and Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China

The reversibility of lithium(Li) metal anodes is highly susceptible to temperature,owing to the aggravated side reactions at high temperatures and serious Li dendrite growth at low *** it is extremely challenging to simultaneously realize the high Li reversibility in both low and high temperature ***,an oxygen-free solvent(n-hexane,HEX) assisted with the hexyl methyl ether and 1 mol L^(-1)lithium bis(fluorosulfonyl)imide is proposed to constitute an electrolyte for temperatureimmune lithium metal *** demonstrates that the HEX not only greatly suppresses the solvent reduction even at high temperatures but also weaken the Li~+-solvent interaction for the facile Li-ion desolvation,leading to high Li Coulombic efficiencies(99.59% at 25℃,99.30%at 60℃ and 98.75% at -30℃) and the dendrite-free Li plating from -30℃ to 60℃.Benefitting from the low density and temperature-immune properties of our electrolyte,the sulfurized polyacrylonitrile(3.8mAh cm^(-2))||Li(60 μm) pouch-cells deliver 278 Wh kg^(-1)energy density and maintain the stable performance over 50 cycles,and retain 248 and 320 Wh kg^(-1) energy density at -30℃ and 60℃,*** work provides a new perspective on the electrolyte design for wide-temperature Li metal batteries.

关键词： wide temperature range oxygen-free solvent dendrite-free Li plating high Coulombic efficiencies lithium metal batteries

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Binding interaction of typical emerging contaminants on Gobiocypris rarus transthyretin:an in vitro and in silico study

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Frontiers of environmental science & engineering 2024年第11期18卷 53-64页

作者： Xiangqiao Li Huihui Liu Songshan Zhao Peter Watson Xianhai Yang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China Los Alamos National Laboratory New Mexico Los AlamosNM 87545USA

Emerging contaminants(ECs)have drawn global concern,and the endocrine disrupting chemicals is one of the highly interested ECs ***,numerous ECs lacks the basic information about whether they can disturb the endocrine related biomacromolecules or elicit endocrine related detrimental effects on *** this study,the potential binding affinity and underlying binding mechanism between 29 ECs from 7 chemical groups and Gobiocypris rarus transthyretin(CrmTTR)are investigated and probed using in vitro and in silico *** experimental results demonstrate that 14 selected ECs(11 disinfection byproducts,1 pharmaceuticals and personal care product,1 alkylphenol,1 perfluoroalkyl and polyfluoroalkyl substance)are potential CrmTTR *** CrmTTR binding affinity of three ECs(i.e.,2,6-diiodo-4-nitrophenol(logRP(T_(4))=0.678±0.198),2-bromo-6-chloro-4-nitrophenol(logRP(T_(4))=0.399±0.0908),tetrachloro-1,4-benzoquinone(logRP(T_(4))=0.272±0.0655))were higher than that of 3,3′,5,5′-tetraiodo-L-thyronine,highlighting that more work should be performed to reveal their potential endocrine related harmful effects on Gobiocypris *** docking results imply that hydrogen bond and hydrophobic interactions are the dominated non-covalent interactions between the active disruptors and *** optimum mechanism-based(for CrmTTR),and high throughput screening(for CrmTTR,little skate-TTR,seabream-TTR,and human-TTR)binary classification models are developed using three machine learning algorithms,and all the models have good classification *** facilitate the use of developed high throughput screening models,a tool named“TTR Profiler”is derived,which could be employed to determine whether a given substance is a potential CrmTTR,little skate-TTR,seabreamTTR,or human-TTR disruptor or not.

关键词： Endocrine disrupting effects Hormone transporter Endocrine disrupting chemicals Disinfection byproducts Classification model

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Analysis of Power Cycle Aging Test for SiC MOSFET 14

Analysis of Power Cycle Aging Test for SiC MOSFET

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14th IEEE Global reliability and Prognostics and Health Management Conference, PHM-Hangzhou 2023

作者： Zheng, Zhouyou Meng, Linghui Li, Xin Ruan, Bin Cui, Haotian School of Electrical and Information Engineering Anhui University of Science and Technology Anhui Huainan China Science and Technology on Reliability Physics and Application of Electronic Component Laboratory China Electronic Product Reliability and Environmental Testing Research Institute Guang dong Guang zhou China School of Information Engineering Southwest University of Science and Technology Mianyang China

ISBN: (纸本)9798350301359

Silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors (MOSFETs) are gradually replacing silicon (Si)based devices as the core devices for power conversion in high-temperature, high-pressure, and high-frequency applications due to their superior material properties. The long-term reliability of SiC MOSFETs has become a research focus. Power cycling tests, an important aging test for evaluating device reliability, can reflect the reliability under real working conditions to some extent. The test is conducted using a constant on/off time mode, and the on-state resistance and body diode voltage drop of the devices are measured online during the aging test. The experimental results show that an increase in on-state resistance during power cycling tests causes an increase in junction temperature, which leads to wire bond aging and eventually results in SiC MOSFET failure. © 2023 IEEE.

关键词： failure mechanism junction temperature measurement power cycling test SiC MOSFET

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Enhancing lithium-sulfur battery performance with In_(2)O_(3)-In_(2)S_(3)@NSC heterostructures:Synergistic effects of double barrier and catalytic transformation

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Journal of Materials science & technology 2024年第2期169卷 105-114页

作者： Deqing He Chunyu Zhu Yutao Huo Zhonghao Rao School of Energy and Environmental Engineering Hebei University of TechnologyTianjin 300401China Hebei Key Laboratory of Thermal Science and Energy Clean Utilization Hebei University of TechnologyTianjin 300401China School of Low-carbon Energy and Power Engineering China University of Mining and TechnologyXuzhou 221116China

The sluggish redox reaction kinetics of lithium polysulfides(LiPSs)are considered the main obstacle to the commercial application of lithium-sulfur(Li-S)*** accelerate the conversion by catalysis and inhibit the shuttling of soluble LiPSs in Li-S batteries,a solution is proposed in this *** solution involves fabrication of N,S co-doped carbon coated In_(2)O_(3)/In_(2)S_(3)heterostructure(In_(2)O_(3)-In_(2)S_(3)@NSC)as a multifunctional host material for the *** In_(2)O_(3)-In_(2)S_(3)@NSC composite can reduce the Gibbs free energy for the conversion reactions of LiPSs,which results in superior *** synergy between different components in In_(2)O_(3)-In_(2)S_(3)@NSC and the unique 3D structure facilitate ion and electron transport in Li-S *** In_(2)O_(3)-In_(2)S_(3)@NSC/Li 2 S 6 cathode exhibits excellent rate capacity,with a capacity of 599 mAh g−1 at 5.5 C,and good cycle stability,with a capacity of 436 mAh g^(−1)after 1000 cycles at 1 ***,this study proposes a promising solution to improve the energy storage properties of Li-S batteries,which could potentially facilitate the commercialization of Li-S batteries.

关键词： Li-S battery Multifunctional host material Synergy Heterostructures Energy storage properties

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