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NuBot:A Magnetic Adhesion Robot with Passive Suspension to Inspect the Steel Lining

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Chinese Journal of Mechanical Engineering 2023年第3期36卷 161-178页

作者： hao xu Youcheng Han Mingda He Yinghui Li Weizhong Guo State Key Lab of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The steel lining of huge facilities is a significant structure,which experiences extreme environments and needs to be inspected periodically after ***,due to the complexity(crisscross welds,curved surface,etc.)of their inside environments,high demands for stable adhesion and curvature adaptability are put *** paper presents a novel wheeled magnetic adhesion robot with passive suspension applied in nuclear power containment called NuBot,and mainly focuses on the following aspects:(1)proposing the wheeled locomotion suspension to adapt the robot to the uneven surface;(2)implementing the parameter optimization of NuBot.A comprehensive optimization model is established,and global optimal dimensions are properly chosen from performance atlases;(3)determining the normalization factor and actual dimensional parameters by constraints of the steel lining environment;(4)structure design of the overall robot and the magnetic wheels are *** show that the robot can achieve precise locomotion on both strong and weak magnetic walls with various inclination angles,and can stably cross the 5 mm weld ***,its maximum payload capacity reaches 3.6 *** show that the NuBot designed by the proposed systematic method has good comprehensive capabilities of surface-adaptability,adhesion stability,and ***,the robot can be applied in more ferromagnetic environments and the design method offers guidance for similar wheeled robots with passive suspension.

关键词： Wheeled robot Passive suspension Magnetic adhesion Steel lining Design method

Postsynthesis of hierarchical core/shell ZSM-5 as an efficient catalyst in ketalation and acetalization reactions

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Frontiers of Chemical Science and Engineering 2020年第2期14卷 258-266页

作者： Peng Luo Yejun Guan hao xu Mingyuan He Peng Wu Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China

Hierarchical core/shell Zeolite Socony Mobil-five(ZSM-5)zeolite was hydrothermally postsythesized in the solution of NaOH and diammonium surfactant via a dissolution-reassembly *** silica and alumina species were firstly dissolved partially from the bulky ZSM-5 crystals and then were reassembled into the MFI-type nanosheets with the structure-directing effect of diammonium surfactant,attaching to the out-surface of ZSM-5 core *** mesopores thus were generated in both the core and shell part,giving rise to a micropore/mesopore composite *** micropore volume and the acidity of the resultant hybrid were well-preserved during this recrystallization *** the multiple mesopores and enlarged external surface area,the core/shell ZSM-5 zeolite exhibited higher activity in the ketalation and acetalization reactions involving bulky molecules in comparison to the pristine ZSM-5.

关键词： core/shell ZSM-5 in situ recrystallization mesopore ketalation and acetalization reactions

Optimal Planning of IDR-integrated Electricity-heat Systems Considering Techno-economic and Carbon Emission Issues

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CSEE Journal of Power and Energy Systems 2023年第6期9卷 2344-2355页

作者： Bo Zeng Yu Liu Yangfan Luo hao xu Luqman Ahmed the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China the State Grid Kaifeng Power Supply Company Kaifeng 475000China

This study presents an optimal electricity-heat system(EHS)planning framework to promote the accommodation of wind power while considering technical,economic and environmental *** this end,integrated demand response(IDR)is introduced as a flexibility resource to complement the inherent fluctuation of renewable energy sources and modeled by using price elasticity *** the timing transferring and energy substitution potentials are considered in the proposed IDR *** the effect of IDR into the EHS planning model,a two-stage stochastic programming model can be devised,in which the optimal EHS configuration design and associated operation control techniques are found simultaneously to minimize the system’s total economic and carbon-emission costs over the planning *** multi-scale uncertainties arising from both long-term demand growth and operation-level variability of renewables/load demands are captured collectively by using a scenario-based *** suggested planning approach is illustrated using a real EHS test case and the results show that it is effective in practical applications.

关键词： Electricity-heat system(EHS) carbon emission wind power multi-scale uncertainties stochastic programming

Seismic damage to road networks subjected to earthquakes in Nepal,2015

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Earthquake Engineering and Engineering Vibration 2017年第3期16卷 649-670页

作者： Xie Quancai Lü Gaohu Chen hao xu Chong Feng Biao Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake Administration CCCC Highway Consultants Co. Ltd. Institute of Geology China Earthquake Administration

The Gorkha earthquake in Nepal led to many landslides and severe damage to the transportation infrastructure. After careful comparison of the aerial photographs and satellite images before and after the earthquake, partially verified by a field study, more than 2,064 landslides and many road failures were observed. Many bridges, especially steel-truss and suspension bridges, suffered little damage from inertia loads during the earthquake, but were severely damaged due to rockfalls. Potential geological hazards hindered the delivery of supplies in mountainous areas, and road closures impeded the overall speed of rehabilitation.

关键词： Gorkha earthquake reconnaissance transportation landslide road network

Actinidia chinensis polysaccharide interferes with the epithelial-mesenchymal transition of gastric cancer by regulating the nuclear transcription factor-κB pathway to inhibit invasion and metastasis

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Journal of Traditional Chinese Medicine 2024年第5期44卷 896-905页

作者： ZHANG Guangshun xu Xiaonan xu Chuyun LIAO Guanghui xu hao LOU Zhaohuan ZHANG Guangji School of Pharmaceutical Sciences Zhejiang Chinese Medical UniversityHangzhou 310053China Key Labortary of Blood-stasis-toxin Syndrome of Zhejiang Province Hangzhou 310053China School of Basic Medical Sciences Zhejiang Chinese Medical UniversityHangzhou 310053China Traditional Chinese Medicine"Preventing Disease"Wisdom Health Project Research Center of Zhejiang Hangzhou 310053China the First Affiliated Hospital of Zhejiang Chinese Medical University Hangzhou 310053China

OBJECTIVE:To investigate the mechanisms of the effect of Actinidia chinensis polysaccharide(ACPS)on the invasion and metastasis of gastric cancer ***:BGC-823-Luc gastric cancer cells stably transfected with a luciferase gene were used to establish an insitutransplanted tumor mouse model.A live mouse imaging system was used to observe tumor growth,and hematoxylin and eosin staining was applied to analyze tissue *** and scratch wound assays were performed to examine the invasive and migratory ability of BGC-823 ***,confocal microscopy,immunohistochemistry,and Western blot assays were used to analyze the expressions of the nuclear transcription factor-κB(NF-κB)signaling pathway and epithelial-mesenchymal transition(EMT)-related ***:ACPS significantly inhibited the growth of subcutaneously transplanted BGC-823-Luc gastric cancer tumors in nude mice and reduced inflammatory cell infiltration in tumor *** inhibited Epidermal Growth Factor-induced invasion,migration,and morphological changes in the cytoskeleton of *** inhibited gastric cancer EMT and decreased the expression of matrix metallopeptidase 9,N-cadherin and p-NF-κB p65 in transplanted tumor *** inhibited the expression of matrix metalloproteinases and vascular adhesion factors in BGC-823 cells,promoted p65-NF-κB nuclear translocation,and regulated proteins associated with the NF-κB p65 ***:ACPS inhibited gastric cancer invasion and metastasis both in vivo and in vitro,which evidenced the inhibition of gastric cancer EMT via regulating the NF-κB inflammatory pathway.

关键词： stomach neoplasms invasion neoplasm metastasis epithelial-mesenchymal transition NF-kappa B signal transduction Actinidia chinensis polysaccharide

Unsupervised Learning for Non-intrusive Load Monitoring in Smart Grid Based on Spiking Deep Neural Network

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Journal of Modern Power Systems and Clean Energy 2022年第3期10卷 606-616页

作者： Zejian Zhou Yingmeng Xiang hao xu Yishen Wang Di Shi Department of Electrical and Biomedical Engineering University of NevadaRenoNVUSA Global Energy Interconnection Research Institute North America(GEIRINA) San JoseCAUSA

This paper investigates the intelligent load monitoring problem with applications to practical energy management scenarios in smart *** one of the critical components for paving the way to smart grids’success,an intelligent and feasible non-intrusive load monitoring(NILM)algorithm is urgently ***,most recent researches on NILM have not dealt with practical problems when applied to power grid,i.e.,①limited communication for slow-change systems;②requirement of low-cost hardware at the users’side;and③inconvenience to adapt to new ***,a novel NILM algorithm based on biology-inspired spiking neural network(SNN)has been developed to overcome the existing *** provide intelligence in NILM,the developed SNN features an unsupervised learning rule,i.e.,spike-time dependent plasticity(STDP),which only requires the user to label one instance for each appliance while adapting to a new *** upgrade the feasibility in NILM,the designed spiking neurons mimic the mechanism of human brain neurons that can be constructed by a resistor-capacitor(RC)*** addition,a distributed computing system has been designed that divides the SNN into two parts,i.e.,smart outlets and local *** the information flows as sparse binary vectors among spiking neurons in the developed SNN-based NILM,the high-frequency data can be easily compressed as the spike times,and are sent to the local server with limited communication capability,whereas it is unable to handle the traditional ***,a series of experiments are conducted using a benchmark public ***,the effectiveness of developed SNN-based NILM can be demonstrated through comparisons with other emerging NILM algorithms such as the convolutional neural networks.

关键词： Non-intrusive load monitoring(NILM) spiking neural network(SNN) smart grid unsupervised machine learning

Near Optimal Output Feedback Control of Nonlinear Discrete-time Systems Based on Reinforcement Neural Network Learning

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IEEE/CAA Journal of Automatica Sinica 2014年第4期1卷 372-384页

作者： Qiming Zhao hao xu Sarangapani Jagannathan the DENSO International America Inc. with the College of Science and Engineering Texas A&M University the Department of Electrical&Computer Engineering Missouri University of Science and Technology

In this paper, the output feedback based finitehorizon near optimal regulation of nonlinear affine discretetime systems with unknown system dynamics is considered by using neural networks(NNs) to approximate Hamilton-JacobiBellman(HJB) equation solution. First, a NN-based Luenberger observer is proposed to reconstruct both the system states and the control coefficient matrix. Next, reinforcement learning methodology with actor-critic structure is utilized to approximate the time-varying solution, referred to as the value function, of the HJB equation by using a NN. To properly satisfy the terminal constraint, a new error term is defined and incorporated in the NN update law so that the terminal constraint error is also minimized over time. The NN with constant weights and timedependent activation function is employed to approximate the time-varying value function which is subsequently utilized to generate the finite-horizon near optimal control policy due to NN reconstruction errors. The proposed scheme functions in a forward-in-time manner without offline training phase. Lyapunov analysis is used to investigate the stability of the overall closedloop system. Simulation results are given to show the effectiveness and feasibility of the proposed method.

关键词： Artificial neural networks Observers Optimal control Learning (artificial intelligence) Approximation methods Feedback Nonlinear dynamical systems

Monte Carlo simulation of methane molecule adsorption on coal with adsorption potential

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International Journal of Mining Science and Technology 2014年第1期24卷 17-22页

作者： Li Xijian Lin Baiquan xu hao School of Mining Guizhou University School of Safety Engineering China University of Mining & Technology

The paper presents a Monte Carlo simulation to study the adsorption characteristics of methane molecule on coal slit pores from different ***,a physical model of adsorption and desorption of methane molecules on micropores was ***,a grand canonical ensemble was introduced as the Monte Carlo simulation ***,based on the model and system,the molecule simulation program was developed with VC++6.0 to simulate the isothermal adsorption relationship between the amount of molecule absorption and the factors affecting ***,the numerically simulated results were compared with measured results of adsorption coal samples of two different coal mines with a laboratory gas absorption *** results show that the molecule simulations of the adsorption constants,the adsorption quantity,and the isothermal adsorption curve at the same and different coal temperatures were in good agreement with those measured in the experiments,indicating that it is feasible to use the established model and the Monte Carlo molecule simulation to study the adsorption characteristics of methane molecules in coal.

关键词： Methane Adsorption Molecular simulation Slit pore Isothermal adsorption curve

A UNIFIED MULTIAXIAL FATIGUE DAMAGE PARAMETER

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Acta Mechanica Solida Sinica 1998年第3期11卷 261-274页

作者： Shang Deguang Wang Dejun xu hao Nanjing Univ Aeronaut & Astronaut Dept Aircraft Engn Nanjing 210016 Peoples R China

According to the critical plane principle, a unified multiaxialfatigue damage parameter is presented based on the varying behaviourof the strains on the critical plane. Both the parameters of themaximum shear strain amplitude and normal strain excursion betweenadjacent turning points of the maximum shear strain on the criticalplane are considered in the multiaxial fatigue damage parme- terpresented. An equivalent strain amplitude is made with bothparameters of the maximun shear strain amplitude and normal strainexcursion by means of von Mises criterion. Thus a new multiaxialfatigue damage model is given based on the critical plane approach.

关键词： multiaxial fatigue critical plane approach proportional loading