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7th International Conference on Electromechanical Control technology and Transportation, ICECTT 2022

作者： Zhang, Liwei Zhang, Shengrong Rao, Yuzhu Zhao, Changming Jiang, Kaizhe Shen, Chong Zhang, Kun Zhao, Zhe Zeng, Penghui Beijing Institute of Technology Beijing100081 China Sansha Guohai Communication Technology Development Co.Ltd. Hainan Haikou570028 China Beijing Institute of Vacuum Electronic Technology Beijing100015 China China Academy of Electronic Sciences Beijing100041 China Hainan University State Key Laboratory of Marine Resources Utilization in the South China Sea Hainan Haikou570028 China Key Laboratory of Island Tourism Resource Data Mining and Monitoring Ministry of Culture and Tourism Hainan Tropical Ocean University Sanya572022 China

ISBN: (纸本)9781510656659

Tidal energy is the kinetic energy created when the gravitational forces of the Moon and the Sun cause periodic reciprocal horizontal movements of seawater, mainly concentrated on shores, waterways between islands, or in the mouths of bays. Tidal currents can usually be classified as reciprocating or rotating, and are mainly the more steady flow in submarine waterways and straits as well as the regular flow of seawater due to tides. Compared to waves, tidal currents are much smoother and more regular. Tides can change in size and direction on average twice a day in response to the rise and fall of the tide. China has extremely rich marine resources, among which tidal energy is abundant, especially offshore tidal energy which is among the highest in the world in terms of power density, therefore the development and production of tidal power generators to improve efficiency and performance is an important step in the implementation of China's sustainable development strategy. Most of the existing tidal power devices are fixed directly to the seabed, which is more conducive to stable energy harvesting, but if the device needs to be installed farther offshore and in deeper water, a floating structure is required to facilitate installation and save costs. A new floating bi-directional tidal power generation device is proposed based on existing research examples and research project requirements, which converts tidal energy into electricity through three stages: energy capture, transmission, and generation. © 2022 SPIE

关键词： Kinetics

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Research on Equipment of Marine Reef Unmanned Floating Platform Information Platform 7

Research on Equipment of Marine Reef Unmanned Floating Platf...

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2022 7th International Conference on Information Science, Computer technology and Transportation, ISCTT 2022

作者： Zhang, Liwei Zhang, Shengrong Ma, Yibo Shen, Chong Zhang, Kun Li, Jun Shen, Shaodong Liang, Wei Beijing Institute of Technology Beijing100081 China CLP Marine Information Technology Research Institute Co. Ltd. Hainan Lingshui572400 China Sansha Guohai Communication Technology Development Co. Ltd. Hainan Haikou570028 China State Key Laboratory of South China Sea Marine Resources Utilization Hainan University Hainan Haikou570028 China Key Laboratory of Island Tourism Resource Data Mining and Monitoring Ministry of Culture and Tourism Hainan Tropical Ocean University Sanya472022 China

ISBN: (纸本)9783800760565

The total length of China's continental coastline from north to south is about 18,000 kilometers, and its island coastline is more than 14,000 kilometers. There are numerous coastal islands, but most of them are unattended. Sovereignty maintenance and maritime law enforcement has always been a problem, among which the lack of effective information platform and equipment is the core problem .Therefore,an unmanned information platform equipped with an information system is proposed .Platform choose based Marine equipment fixed form, design a kind of comprehensive situational three-dimensional perception information platform and using the flexible base caisson gravity base, and Marine energy autonomous system using solar energy is given priority to, platform equipment set "feeling, transfer, use, tubes" in a body, can rapid prototyping, a large number of replication, the maneuverability is strong,It can effectively expand China's geostrategic advantage in the South China sea islands .At present, equipment has completed deployment demonstration in the South China sea, serving as a "maritime sentinel" to realize information defense on remote uninhabited islands and reefs in China. © VDE VERLAG GMBH ∙ Berlin ∙ Offenbach.

关键词： Oceanographic equipment

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Insight into the quality deterioration induced by microorganisms in Litopenaeus vannamei during superchilling storage

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Food Science and Human Wellness 2023年

作者： Kaiying Yang Chuang Pan Xianqing Yang Haiyun Wu Chunsheng Li Shuxian Hao Yongqiang Zhao Shengjun Chen Xiaoshan Long Key Laboratory of Aquatic Product Processing， Ministry of Agriculture and Rural Affairs， National Research and Development Center for Aquatic Product Processing， South China Sea Fisheries Research Institute， Chinese Academy of Fishery Sciences Co-Innovation Center of Jiangsu Marine Bio-industry Technology， Jiangsu Ocean University College of Food Science and Technology， Guangdong Ocean University Collaborative Innovation Center of Seafood Deep Processing， Dalian Polytechnic University Key Laboratory of Efficient Utilization and Processing of Marine Fishery Resources of Hainan Province， Sanya Tropical Fisheries Research Institute Graduate School of Marine Science and Technology， Tokyo University of Marine Science and Technology

Quality deterioration induced by microbial community in Litopenaeus vannamei during superchilling storage were demonstrated in this study. In this study， 6 microorganisms were identified as the biomarkers by 16S rDNA sequencing and 71 differential metabolites were identified by untargeted metabolomics. The correlation analysis between microorganisms and differential metabolites revealed that Oceanicaulis， Aliihoeflea， Prauserella， Chelativorans and Pseudoalteromonas had the potential to be the important microorganisms of deterioration of superchilled shrimp. Moreover， the spearman correlation analysis revealed that L* value had highly significant correlation with Shewanella (P < 0.01)， and TBA value， TVC value total sulfhydryl content， TCA-soluble peptide and Ca2+-ATPase activity showed significantly correlation with Oceanicaulis， Prauserella， Chelativorans， Aliihoeflea and Pseudoalteromonas (P < 0.05). This study offers a better understanding for mechanisms behind quality degradation induced by microorganisms， which may help the quality maintaining of Pacific white shrimp during superchilling storage.

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Design and implementation of mining ship motion simulator

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Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and technology) 2011年第SUPPL. 2期42卷 257-265页

作者： Zheng, Hao Liu, Shao-Jun Hu, Qiong School of Mechanical and Electrical Engineering Central South University Changsha 410083 China State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology Changsha Research Institute of Mining and Metallurgy Changsha 410012 China

In order to set up model test installation of lifting pipe system of deep ocean mining, a mining ship motion simulator was designed and built. Stewart platform was selected to simulate mining ship motion which is six DOFs, i.e.: pitch, roll, yaw, surge, sway and heave. According to mining ship response and similarity principles, the pitch, roll, yaw angles were less than 20° and surge, sway, heave amplitudes were less than 200 mm. The upper and bottom platform were connected by six hydraulic cylinders which were driven by six electro-hydraulic proportional valves independently. SNAP PAC from Opto 22 was selected as the control system and PID control was chosen as the control strategy. The test results show that the mining ship motion simulator can move under the predetermined attitude and can be used as a mining ship simulator.

关键词： Three term control systems

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Research on Thermal Analysis of An Aviation Spiral Bevel Gear Transmission Shafting

Research on Thermal Analysis of An Aviation Spiral Bevel Gea...

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作者： Liu Shaojun Luo Cheng Hu Xiaozhou Zhang Jiang Shenzhen Far East Marine Minerals Exploitation Research Institute Co. Ltd. College of Mechanical and Electrical Engineering Central South University Shenzhen Research Institute of Central South University National Key Laboratory of Deep Sea Mineral Researches Development and Utilization Technology

To study the lubrication performance of an aviation spiral bevel gear transmission shafting,applying theories of tribology and heat transfer,thermal analysis of the entire transmission shafting was performed based on the software platform of ANSYS *** steady-state temperature field were obtained,where the influence of rotational speed and torque were *** results show that in the aviation spiral bevel gear transmission shafting,the highest temperature appears at the contact areas of outer ring raceway and rollers of the ‘compressed' ***,the highest temperature of the driving gear increase respectively with the increasing of rotational speed and ***,the experimental data is basically consistent with the simulation results,which verifies the feasibility of the simulation method.

关键词： Aviation Spiral Bevel Gear Transmission Shafting Thermal Analysis Steady-state Temperature Field

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Influence of the blade angle of guide vane outlet on the performance of lifting electric pump in deep sea mining

Influence of the blade angle of guide vane outlet on the per...

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作者： Liu Shaojun Yang Hengling Hu Xiaozhou Zhao He Shenzhen Far East Marine Minerals Exploitation Research Institute Co. Ltd. College of Mechanical and Electrical Engineering Central South University Shenzhen Research Institute of Central South University National Key Laboratory of Deep Sea Mineral Researches Development and Utilization Technology

In order to study the influence of different blade angle of guide vane outlet on the hydraulic performance of lifting electric pump in deep sea mining,four schemes with different blade angles of guide vane outlet were *** different operating conditions,the numerical simulations were performed on the lifting electric pumps of the four schemes,and the accuracy of the numerical simulation results was verified by model *** results show that the efficiency and head characteristics of the lifting electric pump decrease with the blade angle of the guide vane outlet,and the area of the low speed zone of the guide vane tail increases with the increase of the blade angle of the guide vane *** the blade angle of the guide vane outlet decreases,the static pressure distribution in the pump becomes more uniform,and pressure fluctuations and particle velocity fluctuations become *** the four schemes,when the blade angle of the guide vane outlet is 70°,the hydraulic loss of the guide vane is relatively minimal,the efficiency and head of the lifting electric pump are relatively highest,the supercharging capacity is the strongest,and the pressure field and velocity field distribution are greatly improved compared with the other blade angles.

关键词： Lifting Electric Pump Numerical Simulation Hydraulic Performance

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Experimental study of lifting simulation system for deep-sea mining

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Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and technology) 2011年第SUPPL. 2期42卷 214-220页

作者： Tang, Da-Sheng Yang, Ning Jin, Xing Gong, De-Wen Chen, Guang-Guo State Key Laboratory of the Exploration and Utilization of Deep-sea Mineral Resources Changsha Research Institute of Mining and Metallurgy Co. Ltd. Changsha 410012 China

A set of hydraulic lifting pipe test system was built which is lifting pipe with 224 m in height and 200 mm in inner diameter, in 219 m in depth and 2.2 m in diameter of a mine shaft of Dao Country, Hunan. The system includes collecting, lifting, decorating and recycling, feeding, artificial calibration, measurement and control subsystems. The system utilizes 30 mm simulation nodules, flow velocity is 299.5-447.8 m3/h, and volume fraction is 2%-5%. Decorate and recycling technique of the system was researched. The test verifies rationality of process design of transport lifting test installation. It affords reference for future sea test system. Its technological achievement breaks through the traditional ideas of terrestrial mining and has promotion prospects in hydraulic conveyer coal, river dredging method and land-based underwater mining industries.

关键词： deep sea mining

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Nanogeology in China:A review

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China Geology 2018年第2期1卷 286-303页

作者： Yi-wen Ju Cheng Huang Yan Sun Cai-neng Zou Hong-ping He Quan Wan Xue-qiu Wang Xian-cai Lu Shuang-fang Lu Jian-guang Wu Hong-tai Chao Hai-ling Liu Jie-shan Qiu Fei Huang Hong-jian Zhu Jian-chao Cai Yue Sun Key Laboratory of Computational Geodynamics Chinese Academy of SciencesCollege of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBeijing 100049 China Key Laboratory of Marginal Sea Geology of South China Sea Institute of Oceanology Chinese Academy of SciencesCruangzhou 510301China Carbon Research Laboratory School of Chemical EngineeringDalian University of TechnologyDalian 116012China Key Laboratory of Ministry of Education on Safe Mining of Deep MetalMines School of Resources and Civil EngineeringNorthwestern UniversityShenyang 110819China Institute of Geophysies and Geomatics China University ofGeosciences(Wuhan)Wuhan 430074China School of Earth Sciences and Engineering State Key Laboratory for Mineral Deposits ResearchNanjing UniversityNanjing 210093China PetroChina Research Institute of Petroleum Exploration and Development Beijing 100083China Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhou 510640China State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Institute of Geophysical and Geochemical Exploration CAGSKey Laboratory of Geochemical ExplorationMinistry of Land and ResourcesLangfang 065000China Research Institute of UnconventionalPetroleum and Renewable Energy Chinese University of Petroleum (East China)Qingdao 266580China China United CoalbedMethane Co. Ltd.Beijing 100011China Earthquake Administration of Shandong Province Jinan 250014China

Nanogeology is a subject that is a combination of geology and nanoscale science,and it has been a frontier field in recent *** is also a new subject with the features of intersectionality and multidisciplinary. Digging deeper into geological problems and nanoscale phenomena helps better revealing the more essential mechanisms and processes in geological science,which is also an evitable path in the development of *** this paper,we elaborate the concept,feature and main subdisciplines,and summarize three stages ofnanogeology development from preliminary research in the 1990s to subject formation in *** summarizing the researchers'achievements in this field,we illustrate some primary research progresses of nanogeology in China as eight *** the basis of the above content,we propose the development prospect of nanogeology in *** are many geologic problems with scientific values and economic benefits,such as research of geologic fundamental problems,resource exploration and development,mechanism study and prediction of geological activities (disasters),mechanism research and management of environmental pollution and *** has a great potential in China to solve all of these *** a result,the theories and methods of nanogeology will become enriching and *** offers important theoretical basis and technological methods to deal with major issues concerning the national economy and the people's livelihoods,such as the prediction of geological activities,as well as resource dislribution and its exploration and utilization.

关键词： Nanogeology Nanoparticle Nanostructure Scientific frontier Research progress Research prospect

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Microstructure, Mechanical and Tribological Properties of the Multilayer Graphene Reinforced Wc-10ni3al Prepared by Microwave Sintering

SSRN

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SSRN 2023年

作者： Lu, Ji Tang, Siwen Tang, Lingyan Gao, Meilian Liu, Qian Niu, Qiulin Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and Technology Xiangtan411201 China Engineering Research Center of Mineral Resources Development Technology and Equipment for Deep Sea and Deep Earth Ministry of Education Hunan University of Science and Technology Xiangtan411201 China School of Mechanical Engineering Hunan University of Science and Technology Xiangtan411201 China Hunan Labor and Human Resources Vocational College Changsha410100 China

The multilayer graphene(MLG) reinforced WC-10Ni3Al cemented carbide was prepared by microwave sintering. The effects of sintering temperature and MLG content on the microstructure and mechanical properties of the WC-10Ni3Al cemented carbide were investigated. The promotion effect and strengthening mechanism of MLG on WC-10Ni3Al by microwave sintering were analyzed. The tribological properties of WC-10Ni3Al-MLG and Ti6Al4V were studied, and the wear mechanism of WC-10Ni3Al-MLG was analyzed. The experiment result show that, when the sintering temperature was 1450 °C and MLG content was 0.5wt.%, the sample reached the highest mechanical properties and had a relative density of 96.9%, hardness of 1430 HV, flexural strength of 1410 MPa and fracture toughness of 15.7 MPa·mm1/2, which were 4.2%, 12.2%, 24.4% and 29.6% higher than those of the sample without MLG, respectively. The strengthening mechanisms of MLG in microwave sintered WC-Ni3Al consist of densification enhancement, fine crystal strengthening, energy absorption through MLG pulling out and breaking. The results of friction experiment show that the friction coefficient and wear rate of WC-10Ni3Al-MLG are lower than those of YG8. The lowest friction coefficient of 0.35 and the lowest wear rate of 1.69×10-5mm3N-1m-1 were obtained for WC-10Ni3Al-0.5wt. %MLG samples. A stable solid lubrication film was produced on the friction surface of the WC-10Ni3Al-MLG sample, which was conducive to reducing the breakage and wear of WC grains. MLG can enhance the stability of solid lubrication film and reduce its friction coefficient. © 2023, The Authors. All rights reserved.

关键词： Microstructure

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Effects of Particle Diameter on Erosion Wear Characteristic of deep-sea Mining Pump

Effects of Particle Diameter on Erosion Wear Characteristic ...

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作者： Wen Hao Liu Shao-jun Zou Wei-sheng Hu Xiao-zhou Dong Zhe College of Mechanical and Electrical Engineering Central South University Shenzhen Research Institute of Central South University National Key Laboratory of Deep Sea Mineral Researches Development and Utilization Technology Shenzhen Far East Marine Minerals Exploitation Research Institute Co. Ltd. Institute of Fluid Mechanics and Equipage Hunan University

The wear characteristics of the deep-sea mining pump was *** Euler-Lagrange coupling model,RNG k-s turbulence model and Finnie wear model were used to simulate the solid-liquid two phase flow in the *** influence of particle size on the wear characteristics of hydraulic components was analyzed when the particle volume concentration was 5.14%.The results demonstrate that the wear rate of the impeller is faster than that of the *** wear rate of the shroud is the fastest,followed by the blade and the wear rate of the hub is the *** particle size of10 mm is appropriate for this model,resulting in less *** the simulation results with the experimental results,it is found that the simulation results of the pump external characteristics are consistent with the experimental results in the same condition,indicating the validity and correctness of the simulation ***,suggestions about the design of deep-sea mining pump are put forward.

关键词： deep ocean mining slurry pump numerical simulation solid-phase two-phase flow Finnie wear model erosion characteristics

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