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Heterostructured bimetallic phosphide nanowire arrays with latticetorsion interfaces for efficient overall water splitting

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Journal of Energy Chemistry 2023年第2期77卷 420-427,I0011页

作者： Hua Zhang Hongyi Li Yintang Zhou Fang Tan Ruijie Dai Xijun Liu Guangzhi Hu Laiming Jiang Anran Chen Renbing Wu School of Materials and Energy Institute for Ecological Research and Pollution Control of Plateau LakesSchool of Ecology and Environmental ScienceYunnan UniversityKunming 650091YunnanChina Department of Materials Science Fudan UniversityShanghai 200433China Guangzhou Panyu Polytechnic Guangzhou 511483GuangdongChina National Engineering Research Center for Marine Aquaculture Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316004ZhejiangChina MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004GuangxiChina Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610065SichuanChina

Designing cost-effective and high-efficiency electrocatalysts is critical to the water splitting performance during hydrogen ***,we have developed Fe_(2)P-Co_(2)P heterostructure nanowire arrays with excellent lattice torsions and grain boundaries for highly efficient water *** to the microstructural investigations and theoretical calculations,the lattice torsion interface not only contributes to the exposure of more active sites but also effectively tunes the adsorption energy of hydrogen/oxygen intermediates via the accumulation of charge *** a result,the Fe_(2)P-Co_(2)P heterostructure nanowire array exhibits exceptional bifunctional catalytic activity with overpotentials of 65 and 198 mV at 10 mA cm^(-2) for hydrogen and oxygen evolution reactions,***,the Fe_(2)P-Co_(2)P/NF-assembled electrolyzer can deliver 10 mA cm^(-2) at an ultralow voltage of1.51 V while resulting in a high solar-to-hydrogen conversion efficiency of 19.8%in the solar-driven water electrolysis cell.

关键词： Transition metal phosphide Lattice torsion Heterogeneous interfaces Water splitting Theoretical calculation

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Study on fatigue life evaluation of water lubricated rubber stern tube bearing

Study on fatigue life evaluation of water lubricated rubber ...

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Prognostics and System Health Management Conference (PHM)

作者： Conglin Dong Chengqing Yuan Zhenglin Liu Xinping Yan Reliability Engineering Institute School of Energy and Power Engineering Key Laboratory of Marine Power Engineering & Technology (Ministry of Communications) Wuhan University of Technology Wuhan China

The study on how to use the water medium replacing mineral oil as the lubricating medium of the ship propulsion system, is the high efficient energy-saving of the mechanical transmission system and the frontage of the environmental protection scientific research. The water lubricated rubber stern tube bearing is a very important supporting part of the ship propulsion system, its reliability life will directly affect the safe navigation, covert performance and operating costs of ship. The fatigue life of rubber stern tube bearing is one of the most important indexes. This paper simplifies the contact stress model between the water lubricated rubber stern tube bearing and the stern tube. It designs a simulation program for the fatigue life of the bottom rubber bearing plate whose contact stress is the most complex, lubrication condition is the most harsh, reliability life is the shortest, and which determines the reliability life of the ship water lubricated planar rubber stern tube bearing. It is believed that the knowledge gained in this study will provide the theoretical data for researching on reliability life theory of ship water lubricated rubber stern tube bearing and guide for when repair or change the ship water lubricated rubber stern tube bearing in shipping service industry.

关键词： Materials Electron tubes Strain Navigation

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Towards Efficient Path Finding and Moving Stability-Focused Trajectory Planning for Mobile Robots

Towards Efficient Path Finding and Moving Stability-Focused ...

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2024 IEEE International Conference on Robotics and Biomimetics, ROBIO 2024

作者： Hou, Muyang Lei, Zhenya Hu, Haidong Wang, Zhong Wang, Yong Xie, Le Wang, Hesheng Shanghai Jiao Tong University Department of Automation Shanghai200240 China School of Information and Control Engineering China University of Mining and Technology Xuzhou221116 China Beijing Institute of Control Engineering Beijing100190 China Institute of Medical Robotics Shanghai Jiao Tong University Shanghai200240 China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing of Ministry of Education Key Laboratory of Marine Intelligent Equipment and System of Ministry of Education Department of Automation Shanghai200240 China

ISBN: (纸本)9781665481090

Nowadays, mobile robots play an important role in a variety of service scenarios. They need to plan and track trajectories to accomplish tasks such as delivery or guided tours. In such tasks, there are two remaining challenges: on one hand, the time and memory consumption of present path planners are still significant;on the other hand, service robots, which have a higher center of gravity, demand greater moving stability than that of current trajectory planners provide. To address these two challenges. Firstly, we propose a safety boundary first A∗ which fully utilizes environmental obstacle information to create a safety boundary and searches in it to quickly find an initial path. Secondly, we formulate the trajectory optimization problem as a nonlinear optimization problem, where the smoothness, safety, feasibility, and moving stability of the robot are taken into account. Furthermore, to constrain the robot's lateral acceleration, we design a time allocation algorithm based on non-uniform B-spline, enhancing the quality of the resulting trajectory. Simulations and real-world experiments demonstrate that our algorithms significantly improve path search efficiency, enhance moving stability, reduce the difficulty of tracking, and improve the quality of task completion. © 2024 IEEE.

关键词： Trajectories

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Simulation and Analysis of Interaction in Soft Clay Pile Foundation

Simulation and Analysis of Interaction in Soft Clay Pile Fou...

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2018 International Conference on Civil and Hydraulic engineering, IConCHE 2018

作者： Bin, Li Tianjin Port Engineering Institute Co. Ltd. CCCC First Harbor Engineering Co. Ltd. Tianjin300222 China Key Laboratory of Port Geotechnical Engineering Ministry of Communications Tianjin300222 China Key Laboratory of Tianjin Port Geotechnical Engineering Tianjin300222 China CCCC First Harbor Engineering Company Ltd. Tianjin300461 China China Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth-rock Dam Ministry of Water Resources Nanjing210029 China Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering Guilin University of Technology Guilin541000 China

The single pile foundation is the most common forms of offshore wind turbine, but it is different from offshore oil platforms because of the load and the overturning moment. The elastic-plastic element of ABAQUS has been used to simulate failure modes of the single pile foundation in soft clay. The results shown that the single pile foundation has no plastic strain region under vertical load and has plastic strain under t horizontal load;in front of the pile, the single pile foundation has plastic strain region under bending moment load condition. © Published under licence by IOP Publishing Ltd.

关键词： Piles

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Research on Analyzing of Deep Excavation under Seepage Condition

Research on Analyzing of Deep Excavation under Seepage Condi...

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2018 International Conference on Civil and Hydraulic engineering, IConCHE 2018

作者： Bin, Li Tianjin Port Engineering Institute Co. Ltd. CCCC First Harbor Engineering Co. Ltd. Tianjin300222 China Key Laboratory of Port Geotechnical Engineering Ministry of Communications Tianjin300222 China Key Laboratory of Tianjin Port Geotechnical Engineering Tianjin300222 China CCCC First Harbor Engineering Company Ltd. Tianjin300461 China China Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth-Rock Dam Ministry of Water Resources Nanjing210029 China Guangxi Key Laboratory of Geomechanics Geotechnical Engineering Guilin University of Technology Guilin541000 China

The round excavation with high groundwater level is near to a building. The safety of excavation needs to take into account the geological conditions, the influence of groundwater level and the surrounding environment;combined with the excavation monitoring example, the finite element software is used to simulate the influence of seepage and the stability of the adjacent building, and the simulation results are used to guide the layout of the monitoring points and the optimization of the monitoring scheme;the simulation results show that the effective stress value increases when considering the seepage effect. A 19mm lateral displacement will occur at the top of the underground diaphragm wall adjacent to the building, and a 59mm settlement will occur at a distance of 10m from the top of an underground diaphragm wall. The pore water pressure of the soil will gradually dissipate as the construction progresses;the difference between monitoring results and calculation results is small. The finite element simulation considering the seepage effect can well simulate the excavation with high groundwater leve. It is suggested that the effective stress caused by the seepage flow should be consider when the excavation with high groundwater level. © Published under licence by IOP Publishing Ltd.

关键词： Excavation

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Study on degradation of optical properties of shipping solar cell cover glass

Study on degradation of optical properties of shipping solar...

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Prognostics and System Health Management Conference (PHM)

作者： Jie Lin Chengqing Yuan Yuwei Sun Liangliang Zhao Key Laboratory of Marine Power Engineering & Technology (Ministry of Communications) Wuhan University of Technology Wuhan China Wuhan University of Technology Wuhan Hubei CN

Solar cell is one of the core components in photovoltaic systems. The key issue of the photovoltaic system is the photovoltaic conversion efficiency, which not only depends on the conversion efficiency of the semiconducting silicon, but also is closely related to the transmittance of the cover glass. The photovoltaic conversion efficiency will definitely decrease with the attenuation of spectral transmittance. This study used marine solar panels as the research object to investigate optical attenuation regularity and surface damage characterization of the cover glass through the simulation of marine environment. The evolutions of output characteristics of solar cell have been obtained by a series of experiments. The results showed that the marine environment has a great effect on the output characteristics of the solar cell. The corresponding analysis and discussion has been conducted and presented in the paper.

关键词： Lead Corrosion Silicon Glass Optical attenuators

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Evaluation of laboratory and environmental exposure systems for protein modification upon gas pollutants and environmental factors

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Journal of Environmental Sciences 2024年第9期143卷 213-223页

作者： Zhiwei Pan ShiyiWu Qiaoze Zhu Fobang Liu Yongjian Liang Chenglei Pei Haoyu Jiang Yingyi Zhang Senchao Lai The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China Department of Environmental Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China Guangzhou Sub-branch of Guangdong Ecological and Environmental Monitoring Center Guangzhou 510006China State Key Laboratory of Organic Geochemistry Guangdong Key Laboratory of Environmental Protection and Resources Utilizationand Joint Laboratory of the Guangdong-Hong Kong-Macao Greater Bay Area for the EnvironmentGuangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China School of Marine Sciences Sun Yat-sen UniversityZhuhai 519082China

Chemical modifications of proteins induced by ambient ozone(O_(3))and nitrogen oxides(NOx)are of public health concerns due to their potential to trigger respiratory *** laboratory and environmental exposure systems have been widely used to investigate their relevant mechanism in the *** bovine serum albumin(BSA)as a model protein,we evaluated the two systems and aimed to reduce the uncertainties of both the reactants and products in the corresponding kinetic *** the laboratory simulation system,the generated gaseous pollutants showed negligible *** layers of BSA were coated on the flow tube with protein extraction recovery of 87.4%.For environmental exposure experiment,quartz fiber filter was selected as the upper filter with low gaseous O_(3)(8.0%)and NO_(2)(1.7%)losses,and cellulose acetate filter was appropriate for the lower filter with protein extraction efficiency of 95.2%.The protein degradation process was observed without the exposure to atmospheric oxidants and contributed to the loss of protein monomer mass fractions,while environmental factors(e.g.,molecular oxygen and ultraviolet)may cause greater protein monomer *** on the evaluation,the study exemplarily applied the two systems to protein modification and both showed that O_(3) promotes the protein oligomerization and nitration,while increased temperature can accelerate the oligomerization and increased relative humidity can inhibit the nitration in the environmental exposure *** developed laboratory and environmental systems are suitable for studying protein modifications formed under different atmospheric conditions.A combination of the two will further reveal the actual mechanism of protein modifications.

关键词： Protein modification laboratory simulation Environmental exposure Oligomerization Nitration

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The research of optimal monitoring point placement for health monitoring of dredger based on analytic hierarchy process

The research of optimal monitoring point placement for healt...

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International Conference on Prognostics and Health Management, PHM

作者： Yuelei Zhang Xinping Yan Chengqing Yuan Key Laboratory of Marine Power Engineering & Technology (Ministry of Communications) Wuhan University of Technology Wuhan China Wuhan University of Technology Wuhan Hubei CN

The general scheme of monitoring point placement for health monitoring of dredger is presented based on analytic hierarchy process (AHP) in this paper, according to highly complexity and relevancy of power machinery of dredger. First, hierarchical structure model is established according to AHP. Secondly, evaluation factors based on failure modes, effects, and criticality analysis (FMECA) are analyzed and quantified, which give a comprehensive consideration of monitoring technology about performance parameters, lubricant oil, vibration and instantaneous speed. Finally, the importance degree and priority order of monitoring points are obtained by computing. The general scheme is proposed through considering the relative importance degree. The decision method is simple and effective to be used on the (300 m 3 /h and 8000 m 3 /h) dredgers.

关键词： Condition monitoring Machinery Maintenance marine technology Reliability engineering Failure analysis Performance analysis Fault diagnosis Power engineering and energy Laboratories

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The Response of Carbonate System to Watershed Urbanization Process in a Semi-Arid River

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Journal of Ocean University of China 2024年第4期23卷 991-1002页

作者： LI Yunxiao DANG Jiajia HUANG Xiao YANG Hong WANG Xiao LI Lina BAI Jie CHEN Xi Department of Environmental Science College of Resource and EnvironmentShanxi Agricultural UniversityTaigu 030801China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China Department of Geography and Environmental Science University of ReadingWhiteknightsReading RG66ABUK Marine Agriculture Research Center Tobacco Research InstituteChinese Academy of Agricultural SciencesQingdao 266101China 5 Key Laboratory of Marine Environmental Science and Ecology Ministry of EducationCollege of Environmental Science and EngineeringOcean University of ChinaQingdao 266100China

Different from rivers in humid areas,the variability of riverine CO_(2) system in arid areas is heavily impacted by anthropogenic disturbance with the increasing urbanization and water *** this study,the water chemistry and the controls of carbonate system in an urbanized river(the Fenhe River)on the semi-arid Loess Plateau were *** water chemistry of the river water showed that the high dissolved inorganic carbon(DIC)concentration(about 37 mg L^(-1))in the upstream with a karst land type was mainly sourced from carbonate weathering involved by H_(2)CO_(3) and H_(2)SO_(4),resulting in an oversaturated partial pressure of CO_(2)(pCO_(2))(about 800μatm).In comparison,damming resulted in the widespread appearance of non-free flowing river segments,and aquatic photosynthesis dominated the DIC and pCO_(2) spatiality demonstrated by the enriched stable isotope of DIC(δ^(13)CDIC).Especially in the mid-downstream flowing through major cities in warm and low-runoff August,some river segments even acted as an atmospheric CO_(2) *** noteworthy is wastewater input leading to a sudden increase in DIC(>55 mg L^(-1))and pCO_(2)(>4500μatm)in the downstream of Taiyuan City,and in cold November the increased DIC even extended to the outlet of the *** results highlight the effects of aquatic production induced by damming and urban sewage input on riverine CO_(2) system in semi-arid areas,and reducing sewage discharge may mitigate CO_(2) emission from the rivers.

关键词： dissolved inorganic carbon stable carbon isotope carbonate weathering aquatic photosynthesis sewage input the Fenhe River

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Effect of soaking time on tribological Properties of Thordon bearing Materials in High Temperature Water Bath

Effect of soaking time on tribological Properties of Thordon...

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International Conference on Transportation Information and Safety (ICTIS)

作者： Xincong Zhou Peng Wang Jian Huang Xueshen Liu Chaozhen Yang Da Zhong Shaopeng Xing Key Laboratory of Marine Power Engineering &#x0026 Technology (Ministry of Communications) Wuhan University of Technology Wuhan China Reliability Engineering Institute Wuhan University of Technology Wuhan China

ISBN: (纸本)9781665497145

In view of the fact that its tribological performance will be changed by the Thordon bearing being soaked in the high temperature water environment when working. Thordon bearing samples was soaked in high temperature water bath at 80°C for 0h, 24h, 48h and 72h to study the effect of soaking time on the tribological properties of water lubrication of Thordon. The ring - block friction and wear tests were carried out by SSB-100V ship stern bearing testing machine. The results showed that under the same load and rotational speed, the friction coefficient of Thordon decreased at first and then increased from the increase in soaking time, and the friction coefficient was the minimum when soaked for 24 hours. The main wear mechanism of Thordon material is adhesive wear and furrow wear. With the increase in soaking time, the wear volume of Thordon decreased at first and then increased, and the wear volume was the minimum when the soaking time was 24 hours. This indicates that the soaking time will have an impact on the wear volume of Thordon material.

关键词： Water Temperature Friction Velocity control Transportation Safety Lubrication

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