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

作者： Yu, Lubin Zhou, Zhenwei Huang, Yuhang Liu, Junbin He, Shilie Yu, Pengfei Meng, Linghui Hong, Danni Science and Technology on Reliability Physics and Application of Electronic Component Laboratory China Electronic Product Reliability and Environmental Testing Research Institute Guangzhou China Guangzhou Institute of Technology Xidian University Guangzhou China

ISBN: (纸本)9798350301359

Fault diagnosis has a significant contribution to the reliability of the power module, the stability and accuracy of the fault diagnosis algorithm based on single-channel data have major limitations, and existing fault diagnosis algorithms based on multichannel data have limitations such as insufficient capability of extracting features and low utilization rate of inter-channel correlation information. Therefore, in this paper, a multi-channel fault diagnosis algorithm for power modules based on a hybrid attention network is proposed, aiming at solving the problems of limited fault characterization capability of single-channel data and insufficient feature extraction of existing multi-channel input models. The hybrid attention module of this network adopts a mechanism that combines time attention and channel attention to extract the features of multi-channel data from both channel and time series dimensions of the input data in a holistic manner. The experiments have demonstrated that the hybrid attention network proposed in this paper achieves an accuracy of 99.40% in the multi-channel fault diagnosis test set, which is highly state-of-the-art and practicable, and can provide new ideas and methods for the research in fault diagnosis. © 2023 IEEE.

关键词： Attention mechanism Convolutional neural network Fault diagnosis

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Investigates of substrate mingling ratio and organic loading rate of KOH pretreated corn stover and pig manure in batch and semi-continuous system:Anaerobic digestion performance and microbial characteristics

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Chinese Journal of Chemical engineering 2023年第10期62卷 114-123页

作者： Chenyang Zhu Ruoran Qu Xiujin Li Xiaoyu Zuo Hairong Yuan State Key Laboratory of Chemical Resource Engineering Department of Environmental Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Sinochem Commerce Co. LtdBeijing 100045China

The effects of substrate mingling ratio(SMR)(1:1,1:2,1:3,3:1,and 2:1)and organic loading rate(OLR)(50-90 g total solids per liter per day)on anaerobic co-digestion performance and microbial characteristics were investigated for pig manure(PM)and pretreated/untreated corn stover in batch and semicontinuous anaerobic digestion(AD)*** results showed that SMR and pretreatment affected co-digestion *** maximum cumulative methane yield of 428.5 ml·g^(-1)(based on volatile solids(VS))was obtained for PCP13,which was 35.7%and 40.0%higher than that of CSU and *** the first 5 days,the maximum methane yield improvement rate was 378.1%for *** daily methane yield per gram VS of PCP13 was 11.4%-18.5%higher than that of PC_(U)***_sensu_stricto_1,DMER64,and Bacteroides and Methanosaeta,Methanobacterium,and Methanospirillum had higher relative abundance at the genus ***,SMR and OLR are important factor affecting the AD process,and OLR can affect methane production through volatile fatty acids.

关键词： Substrate mingling ratio Organic loading rate Co-digestion Corn stover Pig manure Microbial community

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Investigation of the promotion effect of Mo doped CuO catalysts for the low-temperature performance of NH_(3)-SCR reaction

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Chinese Chemical Letters 2022年第12期33卷 5223-5227页

作者： Hui Wang Ting Zhu Yujie Qiao Shicheng Dong Zhenping Qu Key Laboratory of Industrial Ecology and Environmental Engineering(MOE) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

A novel Mo-doped CuO catalyst is developed and used for low-temperature NH_(3)-SCR *** with the undoped CuO sample,the Mo doped CuO catalyst shows an increased SCR performance with above 80%NO_(x) conversion at 175℃.The XRD and Raman results have confirmed the incorporation of Mo metal ions into CuO lattice to form Mo-O-Cu species which may be related to the enhanced SCR *** XPS and UV-vis results reveal the creation of electron interaction between Cu and Mo in this Mo-O-Cu system which provides an increased amount of Lewis and Brønsted acid sites,thereby promoting the adsorption capacity of NH_(3) and NO_(x) as verified by NH_(3)-TPD and NO_(x)-TPD ***,it also promotes the formation of oxygen vacancies,leading to the increasing of chemisorbed oxygen species,which improves the NO oxidation to NO_(2) ***,in situ DRIFTS technology was also used to study the reaction mechanism of this Mo doped CuO *** formed NO_(2) could react with NHx(x=3,2)species to enhance the low-temperature NH_(3)-SCR activity via the"fast-SCR"reaction *** nitrate and nitrite ad-species may react with NH_(3) and NH4^(+)ad-species through the L-H pathway.

关键词： Mo doped CuO NH_(3)-SCR NO_(x) Solid solution Low-temperature Reaction mechanism

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Dynamically-evolved surface heterojunction in iridium nanocrystals boosting acidic oxygen evolution and overall water splitting

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Journal of Energy Chemistry 2023年第3期78卷 374-380,I0011页

作者： Chenyu Yang Xiuxiu Zhang Qizheng An Meihuan Liu Wanlin Zhou Yuanli Li Fengchun Hu Qinghua Liu Hui Su National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029AnhuiChina College of Chemistry and Chemical Engineering Hunan Normal UniversityChangsha 410081HunanChina Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory Southwest University of Science and TechnologyMianyang 621010SichuanChina

Simultaneously realizing improved activity and stability of acidic oxygen evolution reaction(OER) electrocatalysts is highly promising for developing cost-effective sustainable energy in the splitting of water ***,we report iridium nanocrystals embedded into 3D conductive clothes(Ir-NCT/CC) as a low iridium electrocatalyst realizing ultrahigh acidic OER activity and robust *** well-designed Ir-NCT/CC requires a low overpotential of 202 mV to reach the current density of 10 mA cm^(-2)with a high mass activity of 1754 A g^(-1).Importantly,in acidic overall water splitting,Ir-NCT/CC merely delivers a cell voltage of 1.469 V at a typical current density of 10 mA cm^(-2)and also maintains robust durability under continuous *** identify that a low working voltage drives the formation of a highly stable amorphous IrOxactive phase over the surface of Ir nanocrystals(surface heterojunction IrOx/Ir-NCT) during operating conditions,which contributes to an effective and durable OER process.

关键词： Electrocatalyst Surface heterojunction In-situ synchrotron radiation techniques Reaction kinetics Acidic overall water splitting

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Facile low-temperature supercritical carbonization method to prepare high-loading nickel single atom catalysts for efficient photodegradation of tetracycline

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Journal of environmental sciences 2024年第4期138卷 373-384页

作者： Han Qiao Lirong Zheng Shiwen Hu Gang Tang Hongri Suo Chongxuan Liu School of Environment Harbin Institute of TechnologyHarbin 150090China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Beijing Synchrotron Radiation Facility(BSRF) Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

environmental photocatalysis is a promising technology for treating antibiotics in *** this study,a supercritical carbonization method was developed to synthesize a single-atom photocatalyst with a high loading of Ni(above 5 wt.%)anchored on a carbonnitrogen-silicate substrate for the efficient photodegradation of a ubiquitous environmental contaminant of tetracycline(TC).The photocatalyst was prepared from an easily obtained metal-biopolymer-inorganic supramolecular hydrogel,followed by supercritical drying and carbonization *** low-temperature(300℃)supercritical ethanol treatment prevents the excessive structural degradation of hydrogel and greatly reduces the metal clustering and aggregation,which contributed to the high Ni *** characterizations confirmed that Ni was present at isolated sites and stabilized by Ni-N and Ni-O bonds in a Ni-(N/O)_(6)-C/SiC configuration.A 5%Ni-C-Si catalyst,which performed the best among the studied catalysts,exhibited a wide visible light response with a narrow bandgap of 1.45 eV that could efficiently and repeatedly catalyze the oxidation of TC with a conversion rate of almost 100% within 40 *** reactive species trapping experiments and electron spin resonance(ESR)tests demonstrated that the h+,and·O_(2)-were mainly responsible for TC *** TC degradation mechanism and possible reaction pathways were provided ***,this study proposed a novel strategy to synthesize a high metal loading singleatom photocatalyst that can efficiently remove TC with high concentrations,and this strategy might be extended for synthesis of other carbon-based single-atom catalysts with valuable properties.

关键词： Carbon-based single-atom catalyst Nickel Photocatalytic degradation Tetracycline Visible light

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Hydrogel-based catalysts for hydrogen generation by the hydrolysis of B–H compounds under external physical fields

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Journal of Energy Chemistry 2023年第11期86卷 518-535,I0011页

作者： Chunling Qin Wenliu Wu Hassanien Gomaa Shuai Wu Cuihua An Qibo Deng Ning Hu Key Laboratory of Hebei Province on Scale-span Intelligent Equipment Technology School of Mechanical Engineeringand School of Materials Science and EngineeringHebei University of TechnologyTianjin 300401China State Key Laboratory of Reliability and Intelligence Electrical Equipment Hebei University of TechnologyTianjin 300130China Advanced Equipment Research Institute Co. Ltd.Of HEBUTTianjin 300401China

Hydrogen is a popular clean high-energy-density ***,its utilization is limited by the challenges toward low-cost hydrogen production and safe hydrogen ***,these issues can be addressed using promising hydrogen storage materials such as B–H *** stored in B–H compounds can be released by hydrolysis at room temperature,which requires catalysts to increase the rate of the ***,several effective approaches have been developed for hydrogen generation by catalyzing the hydrolysis of B–H *** review summarizes the existing research on the use of nanoparticles loaded on hydrogels as catalysts for the hydrolysis of B–H ***,the factors affecting the hydrolysis rate,such as temperature,p H,reactant concentration,and type of nano particles,were ***,the preparation methods(in situ reduction,one-pot method,template adsorption,etc.)for the hydrogel catalysts and the types of loaded catalysts were ***,the hydrogel catalysts that can respond to magnetic fields,ultrasound fields,optical fields,and other physical fields are ***,the issues and future developments of hydrogel-based catalysts are *** review can inspire deeper investigations and provide guidance for the study of hydrogel catalysts in the field of hydrogen production via hydrolysis.

关键词： Hydrogel Nanoparticlec atalyst B-H compounds Hydrolysis reaction External physical field

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Cobalt-loaded carbon nanotubes boosted aerobic ciprofloxacin transformation driven by sulfide:A comprehensive mechanism investigation

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Chinese Chemical Letters 2024年第3期35卷 127-134页

作者： Han-Qing Zhao Peili Lu Fei Chen Chen-Xuan Li Rui Yan Yang Mu State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China CAS Key Laboratory of Urban Pollutant Conversion Department of Environmental Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment College of Environment and EcologyChongqing UniversityChongqing 400045China College of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China

Sulfide oxidation under aerobic conditions can produce active oxygen for the transformation of organic pollutants in aquatic ***,the catalytic performance of transition metal-supported carbon material on this process is poor *** study found that Co-loaded carbon nanotubes(CNTs)was able to realize the efficient aerobic transformation of antibiotic ciprofloxacin(CIP)by sulfide,with the pseudo-first order reaction rate constant improved from 0.013 h^(-1)without catalyst to 0.44–0.71 h^(-1)with 100 mg/L Co-loaded *** oxygen(^(1)O_(2))was the main active specie playing key roles in the process of CIP aerobic transformation with presence of Co-loaded *** studies indicated that the excellent electron transfer ability of Co-loaded CNTs might play an important role to promote the electron transfer and facilitate the formation of intermediate H_(2)O_(2)and^(1)O_(2).Additionally,the Co-loaded CNTs/sulfide system effectively reduced the acute toxicity of organic pollutant,and Co-loaded CNTs showed remarkable cycling stability and negligible *** study gives a better understanding for the Co-loaded CNTs mediated aerobic antibiotics transformation by sulfide,and provide a reference for the application of Co-loaded carbon materials on organics aerobic transformation by sulfide.

关键词： Ciprofloxacin Aerobic transformation Co-loaded carbon nanotubes Sulfide Singlet oxygen

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Dynamics and vibration reduction performance of asymmetric tristable nonlinear energy sink

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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 389-406页

作者： Hongyan CHEN Youcheng ZENG Hu DING Siukai LAI Liqun CHEN School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Frontier Science Center of MechanoinformaticsShanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200444China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina

With its complex nonlinear dynamic behavior,the tristable system has shown excellent performance in areas such as energy harvesting and vibration suppression,and has attracted a lot of *** this paper,an asymmetric tristable design is proposed to improve the vibration suppression efficiency of nonlinear energy sinks(NESs)for the first *** proposed asymmetric tristable NES(ATNES)is composed of a pair of oblique springs and a vertical ***,the three stable states,symmetric and asymmetric,can be achieved by the adjustment of the distance and stiffness asymmetry of the oblique *** governing equations of a linear oscillator(LO)coupled with the ATNES are *** approximate analytical solution to the coupled system is obtained by the harmonic balance method(HBM)and verified *** vibration suppression efficiency of three types of ATNES is *** results show that the asymmetric design can improve the efficiency of vibration reduction through comparing the chaotic motion of the NES oscillator between asymmetric steady *** addition,compared with the symmetrical tristable NES(TNES),the ATNES can effectively control smaller structural *** other words,the ATNES can effectively solve the threshold problem of TNES failure to weak ***,this paper reveals the vibration reduction mechanism of the ATNES,and provides a pathway to expand the effective excitation amplitude range of the NES.

关键词： asymmetric nonlinear energy sink(NES) tristable vibration control po-tential barrier

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An effective strategy for biodegradation of high concentration phenol in soil via biochar-immobilized Rhodococcus pyridinivorans B403

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environmental science and Pollution Research 2024年第23期31卷 33752-33762页

作者： Peng, Fang Liu, Jiashu Ping, Jiapeng Dong, Yuji Xie, Liuan Zhou, Yishan Liao, Lipei Song, Huiting Hubei Key Laboratory of Regional Development and Environmental Response School of Resources and Environmental Science Hubei University Wuhan430062 China State Key Laboratory of Biocatalysis and Enzyme Engineering School of Life Science Hubei University Wuhan430062 China Key Laboratory for Quality Control of Characteristic Fruits and Vegetables of Hubei Province College of Life Science and Technology Hubei Engineering University Xiaogan432000 China

High concentration of phenol residues in soil are harmful to human health and ecological safety. However, limited information is available on the in-situ bioremediation of phenol-contaminated soil using biochar as a carrier for bacteria. In this study, bamboo -derived biochar was screened as a carrier to assemble microorganism-immobilized composite with Rhodococcus pyridinivorans B403. Then, SEM used to observe the micromorphology of composite and its bioactivity was detected in solution and soil. Finally, we investigated the effects of free B403 and biochar-immobilized B403 (BCJ) on phenol biodegradation in two types of soils and different initial phenol concentrations. Findings showed that bacterial cells were intensively distributed in/onto the carriers, showing high survival. Immobilisation increased the phenol degradation rate of strain B403 by 1.45 times (37.7 mg/(L·h)). The phenol removed by BCJ in soil was 81% higher than free B403 on the first day. Moreover, the removal of BCJ remained above 51% even at phenol concentration of 1,500 mg/kg, while it was only 15% for free B403. Compared with the other treatment groups, BCJ showed the best phenol removal effect in both tested soils. Our results indicate that the biochar-B403 composite has great potential in the remediation of high phenol-contaminated soil. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Phenols

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Unraveling the chemical and structural evolution of novel Li-rich layered/rocksalt intergrown cathode for Li-ion batteries

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Chinese Chemical Letters 2024年第12期35卷 289-293页

作者： Yongjian Li Xinyu Zhu Chenxi Wei Youyou Fang Xinyu Wang Yizhi Zhai Wenlong Kang Lai Chen Duanyun Cao Meng Wang Yun Lu Qing Huang Yuefeng Su Hong Yuan Ning Li Feng Wu School of Materials Science and Engineering Beijing Key Laboratory of Environmental Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Chongqing Innovation Center Beijing Institute of TechnologyChongqing 401120China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

The prototype material,Li_(1.23)Ru_(0.41)Ni_(0.36)O_(2),is proposed to gain the deep and comprehensive understanding of chemical and structural changes of the novel layered/rocksalt intergrown *** X-ray absorption spectra and resonant inelastic X-ray scattering reveal that both cationic and anionic redox evolves in the charge compensation process of the intergrown material,while synchrotronbased extended X-ray fine structure spectra and in situ X-ray diffraction measurements demonstrates that the intergrown material undergoes minimal local-and long-range structural variations at deep de/*** work highlights the great potential of the intergrown structure to inspire the design of advanced cathode materials for lithium-ion batteries.

关键词： Cathode materials Intergrown structure Cationic-anionic redox Low strain Synchrotron characterizations

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