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Wind Turbine Gearbox Fault Diagnosis Based on Multi-sensor Signals Fusion

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Protection and Control of Modern Power Systems 2024年第4期9卷 96-109页

作者： yao Zhao Ziyu Song Dongdong Li Rongrong Qian Shunfu lin the College of Electrical Engineering Shanghai University of Electric PowerShanghai 200090China IEEE the Design Research and Development Center AECC Commercial Aircraft Engine Co. Ltd.Shanghai 200241China

This paper proposes a novel fault diagnosis method by fusing the information from multi-sensor signals to improve the reliability of the conventional vibration-based wind turbine drivetrain gearbox fault diagnosis *** method fully extracts fault features for variable speed,insufficient samples,and strong noise scenarios that may occur in the actual operation of a wind turbine planetary ***,multiple sensor signals are added to the diagnostic model,and multiple stacked denoising auto-encoders are designed and improved to extract the fault ***,a cycle reservoir with regular jumps is introduced to fuse multidimensional fault information and output diagnostic results in response to the insufficient ability to process fused information by the conventional Softmax *** addition,the competitive swarm optimizer algorithm is introduced to address the challenge of obtaining the optimal combination of parameters in the ***,the validation results show that the proposed method can increase fault diagnostic accuracy and improve robustness.

关键词： Wind turbine gearbox fault diagnosis multiple scenarios deep learning stacked denoising au-to-encoder cycle reservoir with regular jumps feature fusion network

The synthesis of fluorescent nanoclusters based on the etching reaction

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Nano Research 2024年第5期17卷 4631-4638页

作者： Hongbin lin Yitao Cao Qiaofeng yao Tiankai Chen Huiting Shan Jianping Xie Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585Singapore National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs Engineering Research Center of MTEES(Ministry of Education)and Key Laboratory of ETESPG(GHEI)South China Normal UniversityGuangzhou 510006China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Key Laboratory of Integrated Organic CircuitsMinistry of EducationDepartment of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China

Thiolate-protected atomically precise nanoclusters(NCs)demonstrate a series of unique luminescent characteristics attributed to their various peculiar electronic ***,fluorescent NCs present extraordinary practical values in biosensing and bioimaging research ***,restricted by the types of fluorescent NCs,there are great difficulties in promoting the development of NCs in fluorescent research *** a result,it is of significant necessity for researchers to develop new synthetic pathways to produce high-quality fluorescent *** to the analysis about the structural characteristics of fluorescent NCs,some general features like longer motif and higher ligand-to-metal ratio can be found,consistent to some presented regularities in etching ***,in this work,we used Au_(25)(MHA)_(18)(MHA=6-mercaptohexanoic acid)as a model nanocluster and utilized the etching reaction to systematically explore etching products and their corresponding luminescent ***,we also identified three main reaction processes in the entire etching reaction process,which can generate new metal nanocluster species with various fluorescent ***,the etching reaction will provide a good platform to produce new luminescent metal NC species.

关键词： etching reaction metal nanoclusters fluorescent properties fluorescent conversion

Coordinated Frequency Control for Isolated Power Systems with High Penetration of DFIG-Based Wind Power

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1399-1414页

作者： Xin Ding Wei lin Jian Xu Yuanzhang Sun Liangzhong yao Beilin Mao School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China Department of Electrical Engineering and Computer Science Case Western Reserve UniversityClevelandOH 44106 USA

This paper proposes a coordinated frequency control scheme for emergency frequency regulation of isolated power systems with a high penetration of wind *** proposed frequency control strategy is based on the novel nonlinear regulator theory,which takes advantage of nonlinearity of doubly fed induction generators(DFIGs)and generators to regulate the frequency of the power *** deviations and power imbalances are used to design nonlinear feedback controllers that achieve the reserve power distribution between generators and DFIGs,in various wind speed *** effectiveness and dynamic performance of the proposed nonlinear coordinated frequency control method are validated through simulations in an actual isolated power grid.

关键词： Frequency control isolated power systems nonlinear feedback nonlinear regulator theory wind power

Surface plasmon-coupled radiative heat transfer between graphene-covered magnetic Weyl semimetals

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Science China Technological Sciences 2024年第11期67卷 3405-3412页

作者： SONG Jinlin yao XinJie JIN lin CHEN Lei ZHAO HaiLong CHENG Qiang School of Electrical and Information Engineering Wuhan Institute of Technology State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and Technology

Weyl semimetals(WSMs) have recently attracted considerable research attention because of their remarkable optical and electrical properties. In this study, we investigate the near-field radiative heat transfer(NFRHT) between graphene-covered Weyl slabs, particularly focusing on the supported coupled surface plasmon polaritons(SPPs). Unlike bare Weyl slabs where the epsilon-near-zero(ENZ) effect contributes the most to the NFRHT, adding a monolayer graphene sheet yields coupled SPPs, i.e.,the coupling of graphene SPPs(GSPPs) and Weyl SPPs(WSPPs), which dominates the NFRHT. The graphene sheet greatly suppresses the ENZ effect by compressing the parallel wavevector, thereby enabling the heat transfer coefficient(HTC) to be significantly changed. Further, for the graphene-covered magnetic Weyl slab configuration, an increase in the number of Weyl nodes suppresses the SPP coupling and ENZ effect, thereby weakening the NFRHT with a regulation ratio of 4.4 whereas an increase in the Fermi level slightly influences the NFRHT. Several typical heterostructures are also proposed for comparison, and results show that a mono-cell structure has the largest total HTC. Our findings will facilitate the understanding of surface plasmon-coupled radiative heat transfer and enable opportunities in energy harvesting and thermal management at the nanoscale based on WSM-based systems.

关键词： near-field radiative heat transfer Weyl semimetal surface plasmon polariton epsilon-near-zero graphene

Emergence of machine language: towards symbolic intelligence with neural networks

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National Science Review 2024年第4期11卷 27-30页

作者： Yuqi Wang Xu-yao Zhang Cheng-lin Liu Tieniu Tan Zhaoxiang Zhang State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of Sciences

Representation learning is a core issue in artificial intelligence (AI). Currently,there exists a disparity in the choice of representation between humans and machines. Humans rely on discrete language for communicati...

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A Confined Two-peaked Solar Flare Observed by EAST and SDO

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Research in Astronomy and Astrophysics 2024年第4期24卷 71-83页

作者： Liang Zhang Ruisheng Zheng Zhike Xue Changhui Rao Qing lin Zhimao Du Jiawen yao Libo Zhong yao Chen Institute of Space Sciences Shandong UniversityWeihai 264209China Yunnan Key Laboratory of the Solar physics and Space Science Kunming 650011China Institute of Frontier and Interdisciplinary Science.Shandong University Qingdao266237China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China National Laboratory on Adaptive Optics Chengdu610209China University of Chinese Academy of Sciences Beijing 100049China Shanghai Astronomy Museum Shanghai201306China

The solar flare is one of the most violent explosions,and can disturb the near-Earth space *** for commonly single-peaked solar flares in soft X-ray,some special flares show intriguing a two-peak feature that is deserved much more ***,we reported a confined two-peaked solar flare and analyzed the associated eruptions using high-quality observations from Educational Adaptive-optics Solar Telescope and Solar Dynamics *** the flare,a magnetic flux rope(MFR)formed through partially tether-cutting reconnection between two sheared *** flare occurred after the MFR eruption that was confined by the overlying strong ***,a small underlying filament immediately erupted,which was possibly destabilized by the flare *** successive eruptions were confirmed by the analysis of the emission measure and the reconnection ***,we suggest that the two peaks of the confined solar flare are corresponding to two episodes of magnetic reconnection during the successive eruptions of the MFR and the underlying filament.

关键词： Sun:activity Sun:corona Sun:flares Sun:magnetic fields Sun:filaments prominences Online material:animations

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Highly crystalline Y3Al5O12:Ce3+ phosphor-in-silica glass ceramics for high-power solid-state lighting

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Journal of Rare Earths 2024年第11期42卷 2051-2057页

作者： Shisheng lin Hang lin Hongyi Yang Pengfei Wang Ping Sui Ju Xu yao Cheng Yuansheng Wang Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Xiamen Institute of Rare-earth Materials Haixi InstitutesChinese Academy of Sciences College of Chemistry and Materials Science Fujian Normal University

The pursuit of high-brightness solid-state lighting（SSL） stimulates the development of all-inorganic color converters with high *** is required that the fluorescent material is able to cope with the extreme condition generated from the irradiation of high-power-density excitation *** such,in this work,we developed a new composite color converter,i,e.,Y3Al5O12:Ce3+phosphor-in-silica glass ceramic(YAG:Ce3+PiSGC).Remarkably,the amorphous SiO2matrix spontaneously transforms into tetragonal SiO2crystallites during co-sintering with crystallization fraction reaching up to>90%（almost full ceramization）.The activation energy for crystallization Ecand Avrami index n of amorphous silica oxide are 298.5 kJ/mol and 1.71,indicating the diffusion-controlled glass crystallization *** fabricated prototype high-power phosphor-converted white light-emitting diode（pc-wLED） and phosphor-converted white laser diode（pc-wLD） based on YAG:Ce3+PiSGC show satisfactory photometric/colorimetric *** developed color co nverters have combined merits of environmental protection property,cost-effective manufacturing,good luminescent performance,and easy *** study highlights a new kind of opto-functional composite material and its application as an efficient color converter in high-power solid-state lightings.

关键词： Glass ceramics Laser-driven white light Rare earths White light-emitting diode Y3Al5O12:Ce3+

Insights into sensitizing and eliciting capacity of gastric and gastrointestinal digestion products of shrimp(Penaeus vannamei)proteins in BALB/c mice

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Food Science and Human Wellness 2024年第1期13卷 339-348页

作者： yao Liu Songyi lin Kexin Liu Shan Wang Wang Li Na Sun National Engineering Research Center of Seafood School of Food Science and TechnologyDalian Polytechnic UniversityDalian 116034China Collaborative Innovation Center of Seafood Deep Processing Dalian Polytechnic UniversityDalian 116034China

Shrimp(Penaeus vannamei)proteins have been shown an allergenic potential;however,little information is available on the sensitizing and eliciting capacity of shrimp protein digestion *** this study,a BALB/c mice model was used to explore the allergenicity of shrimp protein sample(SPS)and their gastric and gastrointestinal digestion products(GDS/GIDS).As compared with the SPS groups,the GDS/GIDS groups caused lower specific immunoglobulins(Ig E/Ig G1)levels(P<0.05),but higher than the control groups,indicating that the digestion products sensitized the ***,spleen index,mouse mast cell protease-1(m MCP-1)concentration and proportion of degranulated mast cells were significantly reduced in the GDS/GIDS groups(P<0.05);simultaneously,allergic symptoms,vascular permeability and histopathological changes of tissues were ***,the allergenicity of digestion products cannot be eliminated and still cause systemic allergic reactions in *** study showed that the digestion products of shrimp still had high sensitizing and eliciting capacity.

关键词： Penaeus vannamei Allergenicity Digestion BALB/c mice model

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A zebrafish tufm mutant model for the COXPD4 syndrome of aberrant mitochondrial function

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Journal of Genetics and Genomics 2024年第9期51卷 922-933页

作者： Ting Li Tursunjan Aziz Guangyuan Li lin Zhang Jihua yao Shunji Jia School of Life Sciences Fudan UniversityShanghai 200438China State Key Laboratory of Membrane Biology Tsinghua-Peking Center for Life SciencesSchool of Life SciencesTsinghua UniversityBeijing 100084China State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China

Mitochondrial dysfunction is a critical factor leading to a wide range of clinically heterogeneous and often severe disorders due to its central role in generating cellular *** in the TUFM gene are known to cause combined oxidative phosphorylation deficiency 4(COXPD4),a rare mitochondrial disorder characterized by a comprehensive quantitative deficiency in mitochondrial respiratory chain(MRC)*** development of a reliable animal model for COXPD4 is crucial for elucidating the roles and mechanisms of TUFM in disease pathogenesis and benefiting its medical *** this study,we construct a zebrafish tufm−/−mutant that closely resembles the COXPD4 syndrome,exhibiting compromised mitochondrial protein translation,dysfunctional mitochondria with oxidative phosphorylation defects,and significant metabolic suppression of the tricarboxylic acid *** this COXPD4 zebrafish model,we comprehensively validate the clinical relevance of TUFM mutations and identify probucol as a promising therapeutic approach for managing *** data offer valuable insights for understanding mitochondrial diseases and developing effective treatments.

关键词： Tufm Mitochondria COXPD4 Disease model Zebrafish