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Fault Detection for Motor Drive Control System of Industrial Robots Using CNN-LSTM-based Observers

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CES Transactions on Electrical Machines and Systems 2023年第2期7卷 144-152页

作者： Tao wang Le Zhang xuefei wang the School of Intelligent Equipment Engineering Wuxi Taihu UniversityJiangsu International Cooperation Laboratory of 6G Network and Big Data Intelligent ApplicationWuxi214064China the School of Intelligent Equipment Engineering Wuxi Taihu UniversityWuxi214064China

The complex working conditions and nonlinear characteristics of the motor drive control system of industrial robots make it difficult to detect *** this paper,a deep learning-based observer,which combines the convolutional neural network(CNN)and the long short-term memory network(LSTM),is employed to approximate the nonlinear driving control *** layers are introduced to extract dynamic features of the data,whereas LSTM layers perform time-sequential prediction of the target *** terms of application,normal samples are fed into the observer to build an offline prediction model for the target *** trained CNN-LSTM-based observer is then deployed along with the target system to estimate the system *** fault detection can be realized by analyzing the ***,an application of the proposed fault detection method to a brushless DC motor drive system is given to verify the effectiveness of the proposed *** results indicate the impressive fault detection capability of the presented method for driving control systems of industrial robots.

关键词： Fault detection Motor drive control system Deep learning CNN-LSTM Industrial robot

Pathogenesis of motor neuron disease

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Neural Regeneration Research 2006年第9期1卷 833-836页

作者： xuefei wang Department of Science Education Yiling Hospital of Hebei Province Shijiazhuang 050091 Hebei Province China

OBJECTIVE: To summarize and analyze the factors and theories related to the attack of motor neuron disease, and comprehensively investigate the pathogenesis of motor neuron disease. DATA SOURCES: A search of Pubmed database was undertaken to identify articles about motor neuron disease published in English from January 1994 to June 2006 by using the keywords of 'neurodegenerative diseases'. Other literatures were collected by retrieving specific journals and articles. STUDY SELECTION: The data were checked primarily, articles related to the pathogenesis of motor neuron disease were involved, and those obviously irrelated to the articles were excluded. DATA EXTRACTION: Totally 54 articles were collected, 30 of them were involved, and the other 24 were excluded. DATA SYNTHESIS: The pathogenesis of motor neuron disease has multiple factors, and the present related theories included free radical oxidation, excitotoxicity, genetic and immune factors, lack of neurotrophic factor, injury of neurofilament, etc. The studies mainly come from transgenic animal models, cell culture in vitro and patients with familial motor neuron disease, but there are still many restrictions and disadvantages. CONCLUSION: It is necessary to try to find whether there is internal association among different mechanisms, comprehensively investigate the pathogenesis of motor neuron diseases, in order to provide reliable evidence for the clinical treatment.

关键词： Pathogenesis of motor neuron disease gene

Self-optimized H-adsorption affinity of CuRu alloy cocatalysts towards efficient photocatalytic H_(2)evolution

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Journal of Materials Science & Technology 2024年第7期174卷 168-175页

作者： Meiya wang Ping wang xuefei wang Feng Chen Huogen Yu School of Chemistry Chemical Engineering and Life Sciencesand School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430078China

In addition to the electron transfer,the appropriate H-adsorption affinity of active centers on the metal cocatalyst surface is quite important for high hydrogen-production activity of cocatalyst-modified *** typical Cu and Ru metal cocatalysts clearly exhibit a weak Cu-H bond and a strong Ru-H bond,respectively,resulting in limited activity for photocatalytic H_(2)*** this work,an ingenious strategy of self-optimized H-adsorption affinity in CuRu alloy cocatalyst is developed to simultaneously reinforce the Cu-H bond and weaken the Ru-H bond by the intrinsic electron transfer from Cu to Ru *** CuRu alloy nanoparticles(2-3 nm)were deposited on the TiO_(2)surface to prepare CuRu/TiO_(2)through a one-step photoreduction *** tests exhibited that the highest H_(2)-production rate of CuRu/TiO_(2)photocatalyst reached up to 5.316 mmol h^(-1)g^(-1),which was 24.80,1.86,and 2.60 times higher than that of the TiO_(2),Cu/TiO_(2),and Ru/TiO_(2),*** on the characterization results and theoretical calculations,the CuRu alloy cocatalyst exhibits excellent self-optimized H-adsorption affinity via the spontaneous electron transfer from Cu to Ru atom,which can greatly accelerate the photocatalytic H_(2)-production rate of TiO_(2).This work provides a feasible idea for the self-optimized H-adsorption affinity of metal active sites in the photocatalytic H_(2)-generation field.

关键词： TiO_(2) CuRu alloy Cocatalyst Self-optimized H-adsorption affinity Photocatalytic H_(2)generation

Oxygen-contained amorphous MoS_(x) cocatalyst by one-step photodeposition to enhance H-adsorption affinity for efficient photocatalytic H_(2)generation

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Nano Research 2023年第7期16卷 8977-8986页

作者： Pinsi Deng Ping wang xuefei wang Feng Chen Huogen Yu School of Chemistry Chemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China

Traditional bulk MoS_(2) as an effective H_(2)-evolution cocatalyst is mainly subjected to the weak hydrogen-adsorption ability of highporpotion saturated S,resulting in a slow interfacial H_(2)-evolution *** this paper,an efficient strategy for enhancing hydrogen adsorption of saturated S by manipulating electron density through O atoms is proposed to boost photocatalytic performance of ***,amorphization of MoS_(2) can further increase the unsaturated active S ***,oxygencontained amorphous MoS_(x)(a-MoOS_(x))nanoparticles(10-30 nm)were tightly loaded on the CdS surface through a mild photoinduced deposition method by using(NH_(4))_(2)[MoO(S_(4))_(2)]solution as the precursor at room *** photocatalytic H_(2)-evolution result showed that the a-MoOS_(x)/CdS performed the superior H_(2)-production activity(382μmol·h^(-1),apparent quantum efficiencies(AQE)=11.83%)with a lot of visual H_(2)bubbles,which was 54.6,2.5,and 5.1 times as high as that of CdS,MoS_(x)/CdS,and annealed a-MoOS_(x)/CdS,*** and density functional theory(DFT)calculations revealed the mechanism of improved H_(2)-evolution activity is that the O heteroatom in amorphous MoOS_(x) can enhance the atomic H-adsorption ability by manipulating the electron density to form electron-deficient S^((2-δ)-)*** study provides a new idea to improve the efficiency and number of H_(2)-evolution active sites for developing efficient cocatalysts in the field of photocatalytic hydrogen evolution.

关键词： CdS photocatalytic hydrogen evolution cocatalyst oxygen-contained amorphous MoS_(x)(a-MoOS_(x)) atomic hydrogen adsorption

Effect of component substitution on the microstructure and mechanical properties of MCoCrFeNiTi_x (M = Cu, Al) solid-solution alloys

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Rare Metals 2008年第6期27卷 627-631页

作者： ZHOU Yunjun ZHANG Yong wang xuefei wang Yanli CHEN Guoliang State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China

MCoCrFeNiTix （M = Cu, Al; x： molar ratio, x = 0, 0.5） alloys were prepared using the new alloy-design strategy of equal-atomic ratio and high entropy. By the component substitution orAl for Cu, the microstructure changes from the face-centered cubic solid solution of original CuCoCrFeNiTix alloys to the body-centered cubic solid solution of AlCoCrFeNiTix alloys. Compared with original CuCoCrFeNiTix alloys, AlCoCrFeNiTix alloys keep the similar good ductility and simultaneously possess a much higher compressive strength, which are even superior to most of the reported high-strength alloys like bulk metallic glasses.

关键词： solid-solution alloys microstructure mechanical properties component substitution high entropy

A Simplified Computational Model of Mushroom Body for Tethered Bees' Abdominal Swing Behavior Induced by Optic Flow

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Chinese Journal of Electronics 2021年第2期30卷 296-302页

作者： ZHENG Nenggan MA Qian wang xuefei ZHAO Lei GONG Zhefeng Qiushi Academy for Advanced Studies Zhejiang University College of Computer Science and Technology Zhejiang University Department of Neurobiology Zhejiang University School of Medicine Zhejiang Lab

Understanding sensorimotor neural circuits plays an important role in the study of behavioral mechanisms. By virtue of a relatively simple brain structure and sophisticated locomotion behaviors, insects are selected as comparative research subjects to discover the basic principles of neural science. Specific abdominal swing behaviors of tethered bees induced by optomotor response are realized. To model functionality of mushroom body in the optic-flow induced swing behaviors, a simplified 3-layer Spiking neural network(SNN) is proposed. Spike response model is used as the single neuron model in the proposed SNN, which is trained by supervised learning method. The computational model can accurately simulate and predict the bees’ abdominal swing behaviors exhibiting ipsilateral direction and proportional frequencies with optic flow stimulus.

关键词： image sequences optic flow stimulus tethered bees induced neurophysiology SNN neural science brain specific abdominal swing biomechanics mobile robots comparative research subjects neurocontrollers single neuron model simplified computational model neural network neural nets learning (artificial intelligence) behavioral mechanisms mushroom body optomotor response sophisticated locomotion behaviors optic-flow induced swing behaviors spike response model sensorimotor neural circuits relatively simple brain structure

Preparation for Retarding and High Early Strength Concrete

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Journal of Wuhan University of Technology(Materials Science) 2015年第4期30卷 787-789页

作者：胡志坚 FENG Hao wang xuefei Department of Road and Bridge Engineering Wuhan University of Technology Department of Chemistry Wuhan University of Technology

The primary objective of this research was to determine optimum dosage of mixing concrete containing plasticizers and fly ash, consistent with desirable structural grade concrete properties. Factorial tests were also conducted to investigate the four main factors： water-cementing materials ratio, water content, content of superplasticizers （SP） and fly ash content. It was found that the requirement for setting time played the dominant role in shrinkage and anti-cracking, and fly ash played a critical role in workability and reducing heat of hydration but showed insignificant effects on slump, early strength and initial setting time of concrete.

关键词： high slump maintaining performance fly ash retarding and high early strength concrete initial setting time heat of hydration

PointNetV3:feature extraction with position encoding

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Optoelectronics Letters 2024年第8期20卷 483-489页

作者： wang Jun wang xuefei ZHoU Boxiong GUO Dongyan College of Computer Science and Technology Zhejiang University of TechnologyHangzhou 310023China

Feature extraction of point clouds is a fundamental component of three-dimensional(3D)vision *** existing feature extraction networks primarily focus on enhancing the geometric perception abilities of networks and overlook the crucial role played by *** instance,though two airplane wings share the same shape,it demands distinct feature representations due to their differing *** this paper,we introduce a novel module called position aware module(PAM)to leverage the coordinate features of points for positional encoding,and integrating this encoding into the feature extraction network to provide essential positional ***,we embed PAM into the Point Net++framework,and design a novel feature extraction network,named Point Net *** validate the effectiveness of Point Net V3,we conducted comprehensive experiments including classification,object tracking and object detection on point *** results of remarkable improvement in three tasks demonstrate the exceptional performance achieved by Point Net V3 in point cloud processing.

关键词： Net Point exceptional

Photoinduced charge transfer in porphyrin-C_(60) oligomer

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Science China Chemistry 2010年第2期53卷 419-425页

作者： JIA MingLi WAN Yan wang xuefei XIA AnDong State Key Laboratory of Molecular Reaction Dynamics Beijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190China

Photoinduced electron transfer (ET) between C60 and porphyrin (P) in a new polymer containing porphyrin, poly(p-phenyle nevinylene), and pendant fullerene units has been investigated by nanosecond transient absorption and phosphorescence spectroscopy. Compared to the physically doping material systems, binding porphyrin/C60 through chemical bonds in a polymer detains the formation of the triplet states of porphyrins and C60. The formation of intermediate charge transfer state (CSS) of P·+-C60·? was observed, which led to the delayed formation of triplet states of porphyrins and C60. The reduced opto-electronic properties, such as optical limiting performance, were also observed, which resulted from the delayed formation of triplet states. The results presented in this article are significant in understanding the complicated spectral characteristics of the triplet state and charge transfer of the porphyrin and C60 complexes, and are therefore related to the controllable performance of the new materials in applications.

关键词： intramolecular charge transfer(ICT) triplet-triplet absorption donor-acceptor compound