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31st International Ocean and Polar Engineering Conference, ISOPE 2021

作者： Wang, Jian-Hua Li, Xi-Bing Liu, Shao-Jun Jia, Min-Tao School of resources and safety engineering Central South University Changsha Hunan China Shenzhen Yantian Port Group Co. Ltd Shenzhen Guangdong China Shenzhen Institute of Central South University ShenzhenGuangdong China State Key Laboratory of Exploitation and Utilization of Deep sea Mineral Resource Changsha Hunan China Sinosteel Maanshan General Institute of Mining Research Co. Ltd Maanshan Anhui China

ISBN: (纸本)9781880653821

Based on practical needs of governments and enterprises, a new development direction is proposed for deep sea exploration vessels. The advantages and disadvantages of the existing main vessels are analyzed according to their development status in this paper. It is planned to develop a new-type of unmanned, low-cost, long-range, highly quiet deep sea cruiser and AI automatic vessel, which will be able to cruise in the oceans, detect the distribution of important substances in sea water and on the seabed, obtain key physical and chemical information of the marine environment, and draw the distribution map of important global underwater resource data, which will help the development of related marine industries. © 2021 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Costs

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Research on Trajectory Smoothing Optimization Algorithm of Underwater Long Baseline Positioning System

Research on Trajectory Smoothing Optimization Algorithm of U...

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International Conference on Communication technology (ICCT)

作者： Kun Zhang Shengrong Zhang Ju Huang Chong Shen School of Information Science and Technology Hainan Normal University Haikou Hainan China State Key Laboratory of Marine Resources Utilization in South China Sea Hainan University Haikou Hainan China Key Laboratory of Island Tourism Resource Data Mining and Monitoring Ministry of Culture and Tourism Hainan Tropical Ocean University Sanya Hainan China Sansha Guohai Communication Technology Development Co.Ltd. Sansha Hainan China

With the development of economy and military in today's era, more and more fields have higher and higher requirements for the positioning accuracy of underwater vehicles. However, so far, the main way of underwater positioning still depends on the underwater acoustic positioning method under the background of geometric principle. At the same time, according to the size of different receiving acoustic array, it can be divided into the following three categories: long baseline positioning technology (LBL), short baseline positioning technology (SBL) and ultra short baseline positioning technology (USBL). The positioning system used in this paper is based on the long baseline positioning system.

关键词： Smoothing methods Filtering Filtering algorithms Prediction algorithms Communications technology Trajectory Kalman filters

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Comparison of gold precipitation processes between disseminated and quartz vein ores of orogenic gold deposits: insights from the Linglong gold field, Jiaodong Peninsula, China

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Ore Geology Reviews 2025年 183卷

作者： Xian-Fa Xue Yue-Chuan Feng Murat Taner Tamer Tao Liu Kang Li Jia-Dong Ma Jia-Hui Zhou Hao-Cheng Yu Zheng-Jiang Ding State Key Laboratory of Geological Processes and Mineral Resources Frontiers Science Center for Deep-time Digital Earth School of Earth Sciences and Resources China University of Geosciences Beijing 100083 China Key Laboratory of Metallogenic Geological Process and Resources Utilization in Shandong Province Key Laboratory of Gold Mineralization Processes and Resource Utilization Subordinated to the Ministry of Natural Resources Shandong Institute of Geological Sciences Jinan 250013 China State Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing 100029 China Department of Geological Engineering Faculty of Engineering Çukurova University Adana 01250 Turkey Shandong Gold Mining (Linglong) Co. LTD. Zhaoyuan 265419 China Ministry of Natural Resources Technology Innovation Center for Deep Gold Resources Exploration and Mining/Shandong Provincial Engineering Laboratory of Application and Development of Big Data for Deep Gold Exploration No. 6 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources Weihai 264209 China

The presence of disseminated ores and quartz vein ores in orogenic gold deposits, has given rise to an ongoing discourse surrounding the mechanisms of gold precipitation. This study employs trace element analysis and sulfur isotope analysis of pyrite in the orogenic Linglong gold field to comparatively assess the gold precipitation processes. Pyrite in disseminated ores (Pyd) is classified into Pyd1 and Pyd2, with gold primarily hosted in Pyd2, followed by Pyd1. In the context of quartz vein ores (Pyv), pyrite is subdivided into Pyv1, Pyv2, and Pyv3, with gold predominantly hosted in Pyv3. In the context of disseminated ores, the Au and As content is below the solid solubility limit of Au in pyrite, thereby suggesting that gold primarily exists as a solid solution (Au 1+ ). The lg (Co)/lg (Ni) ratios in Pyd are −0.11 ± 1.23, predominantly below 1, suggesting water–rock interactions. The significantly lower ratios observed in Pyd2 (−0.26 ± 1.21) suggest intense water–rock interaction. The Ag/Co ratios in Pyd1 and Pyd2 are 0.074 and 23.65, with relative standard deviations (RSD) of 31.57 and 25.91, respectively, indicating weak fluid boiling. Furthermore, the sulfur isotope values (medians of 5.51 ‰ ± 0.81 ‰) indicate stable oxygen fugacity in disseminated ores. The presence of visible gold in the quartz veins ores of Pyv2 and Pyv3, in contrast to the low gold content observed in the pyrite (median value of 0.03 ppm), further substantiates these observations. The lg (Co)/lg (Ni) ratio for Pyv is 0.98 ± 2.04, which is close to 1, indicating weak water–rock reactions. The Ag/Co ratios in Pyv1, Pyv2, and Pyv3 are 0.0008, 0.009, and 0.09, with RSD values of 10.5, 63.55, and 89.86, respectively. The values of Pyv2 and Pyv3 are significantly higher than those in Pyv, indicating fluid boiling. Furthermore, a decline in sulfur isotope values from 7.6 ‰ ± 0.2 ‰ in Pyv1 to 5.0 ‰ ± 1.2 ‰ in Pyv3 is indicative of an increase in oxygen fugacity. The analysis of pyrite indicates th

关键词： Gold precipitation processes Trace element of pyrite Sulfur isotope Disseminated ores and quartz vein ores Linglong gold field

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Revealing the Hot Workability and Deformation Mechanism of a Low-Density Fe-Mn-Al-C Duplex Steel

SSRN

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SSRN 2022年

作者： Wu, Zhiqiang Liu, Shuai Hasan, Md Nzmul Li, Eric Chi, Yunguang Xiao, Daheng Yu, Qing Zhang, Shunhu Hu, Jun Chen, Lei Lu, Liwei An, Xianghai 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 Hunan Xiangtan411201 China School of Aerospace Mechanical and Mechatronic Engineering The University of Sydney SydneyNSW2006 Australia School of Computing Engineering & Digital Technologies Teesside University Middlesbrough United Kingdom Technical Quality Department Xiangtan Iron & Steel Co. Ltd of Hunan Valin Hunan Xiangtan411101 China Shagang School of Iron and Steel Soochow University Suzhou215021 China The State Key Laboratory of Rolling and Automation Northeastern University Liaoning Shenyang110819 China Xiangtan University China

In this study, we systematically investigated the hot deformation behavior of a low-density dual-phase Fe-Mn-Al-C steel during compression tests at the temperature range of 800-1000 °C and strain rates of 0.01-101s-1. The constitutive relation for the hot deformation of this steel was established to explore its flow behavior quantitatively, while the hot processing map was constructed to optimize the hot working parameters. In addition, the flow behavior, mechanical properties and microstructural evolutions of the steel at different temperatures and a high strain rate 101s-1 that are comparable to that during hot processing (rolling and forging) were mainly focused. The flow stress decreases with increasing the temperatures, while the peak stress appears at a more considerable strain with lowering the deformation temperatures. Moreover, the steel exhibited superior peak strengths at different temperatures compared to other traditional steels. In the unstable zone of the processing map, the ferrite and the austenite exhibit distinct hot deformation behavior, leading to inhomogeneous deformation. With increasing the temperature, the critical zone and the stable zone appear successively. The dynamic recrystallization (DRX) played increasingly crucial roles in the deformation of austenite, while a gradual transition from dynamic recovery to DRX occurred to undertake the deformation of ferrite. © 2022, The Authors. All rights reserved.

关键词： Dynamic recrystallization

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Protective Mechanism of Fruit Vinegar Polyphenols Against Ages-Induced Caco-2 Cell Damage

SSRN

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SSRN 2022年

作者： Wu, Qian Kong, Yingfei Liang, Yinggang Niu, Mengyao Zhang, Chan Guo, Zhiqiang Xiao, Juan He, Yi Zhou, Mengzhou Feng, Nianjie National "111" Center for Cellular Regulation and Molecular Pharmaceutics Hubei Key La-boratoy of Industrial Microbiology Hubei Research Center of Food Fermentation En-gineering and Technology Hubei University of Technology Hubei Wuhan430068 China Beijing Laboratory of Food Quality and Safety School of Food and Chemical Engineering Beijing Technology and Business University Beijing100048 China State Key Laboratory of Marine Resource Utilization in South China Sea Ministry of Education Key Laboratory of Food Nutrition and Functional Food of Hainan Province Engineering Research Center of Utilization of Tropical Polysaccharide Resources School of Food Science and Engineering Hainan University Haikou China National R&D Center for Se-rich Agricultural Products Processing Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products School of Modern Industry for Selenium Science and Engineering Wuhan Polytechnic University Wuhan430023 China

Accumulation of advanced glycation end products (AGEs) is linked with development or aggravation of many degenerative processes or disorders. Fruit vinegars are rich in polyphenols that can be a good dietary source of AGEs inhibitors. In this study, eight kinds of vinegars were prepared. Among them, the highest polyphenol and flavonoid content were orange vinegar and kiwi fruit vinegar, respectively. Ferulic acid, vanillic acid, chlorogenic acid, p-coumaric acid, caffeic acid, catechin, and epicatechin were main polyphenols in eight fruit vinegars. Then, we measured the inhibitory effect of eight fruit vinegars on fluorescent AGEs, and found that orange vinegar had the highest inhibitory rate. Data here suggested that orange vinegar and its main components catechin, epicatechin, and p-coumaric acid could effectively reduce the level of ROS, RAGE, NADPH and inflammatory factors in Caco-2 cells. Our research provided theoretical basis for the application of orange vinegar as AGEs inhibitor. © 2022, The Authors. All rights reserved.

关键词： Citrus fruits

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Modes of genetic adaptations underlying functional innovations in the rumen

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Science China(Life Sciences) 2021年第1期64卷 1-21页

作者： Xiangyu Pan Yudong Cai Zongjun Li Xianqing Chen Rasmus Heller Nini Wang Yu Wang Chen Zhao Yong Wang Han Xu Songhai Li Ming Li Cunyuan Li Shengwei Hu Hui Li Kun Wang Lei Chen Bin Wei Zhuqing Zheng Weiwei Fu Yue Yang Tingting Zhang Zhuoting Hou Yueyang Yan Xiaoyang Lv Wei Sun Xinyu Li Shisheng Huang Lixiang Liu Shengyong Mao Wenqing Liu Jinlian Hua Zhipeng Li Guojie Zhang Yulin Chen Xihong Wang Qiang Qiu Brian PDalrymple Wen Wang Yu Jiang Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling712100China School of Ecology and Environment Northwestern Polytechnical UniversityXi’an710072China Section for Computational and RNA Biology Department of BiologyUniversity of CopenhagenCopenhagenDK-2100Denmark University of Chinese Academy of Sciences Beijing100049China Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunming650223China CEMS NCMISMDISAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing100080China Marine Mammal and Marine Bioacoustics Laboratory Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanya572000China College of Life Sciences Shihezi UniversityShihezi832003China State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of Animal Science and TechnologyGuangxi UniversityNanning530005China College of Animal Science and Technology Yangzhou UniversityYangzhou225009China Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China Yangzhou UniversityYangzhou225009China Key Laboratory for Major Obstetric Diseases of Guangdong Province The Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhou510150China School of Life Science and Technology Shanghai Tech UniversityShanghai201210China College of Animal Science and Technology Nanjing Agricultural UniversityNanjing210095China College of Veterinary Medicine Shaanxi Centre of Stem Cells Engineering&TechnologyNorthwest A&F UniversityYangling712100China Department of Special Economic Animal Nutrition and Feed Science Institute of Special Animal and Plant SciencesChinese Academy of Agricultural SciencesChangchun130112China Section for Ecology and Evolution Department of BiologyUniversity of CopenhagenCopenhagenDK-2100Denmark China National GeneBank BGI-ShenzhenShen

The rumen is the hallmark organ of ruminants and hosts a diverse ecosystem of microorganisms that facilitates efficient digestion of plant *** analyzed 897 transcriptomes from three Cetartiodactyla lineages:ruminants,camels and cetaceans,as well as data from ruminant comparative genomics and functional assays to explore the genetic basis of rumen functional *** identified genes with relatively high expression in the rumen,of which many appeared to be recruited from other *** genes show functional enrichment in ketone body metabolism,regulation of microbial community,and epithelium absorption,which are the most prominent biological processes involved in rumen *** modes of genetic change underlying rumen functional innovations were uncovered,including coding mutations,genes newly evolved,and changes of regulatory *** validated that the key ketogenesis rate-limiting gene(HMGCS2)with five ruminant-specific mutations was under positive selection and exhibits higher synthesis activity than those of other *** newly evolved genes(LYZ1 and DEFB1)are resistant to Gram-positive bacteria and thereby may regulate microbial community ***,we confirmed that the changes of regulatory elements accounted for the majority of rumen gene *** results greatly improve our understanding of rumen evolution and organ evo-devo in general.

关键词： rumen innovations comparative transcriptomics comparative genomics evo-devo evolution of organs

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Heterogeneity in ice sheets- vs. monsoon rainfall-induced silicate weathering from high to low latitudes

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npj Climate and Atmospheric Science 2025年第1期8卷 1-11页

作者： Xuguang Feng Jianjun Zou Xuefa Shi Zhengquan Yao Zhi Dong Han Feng Jiang Dong Kunshan Wang Zhaojie Yu Debo Zhao Zhengyao Lu Hai Cheng Hanying Li Yi Zhong Key Laboratory of Marine Geology and Metallogeny First Institute of Oceanography Ministry of Natural Resources Qingdao 266061 China Laboratory for Marine Geology Qingdao Marine Science and Technology Center Qingdao 266237 China Key Laboratory of Deep Sea Mineral Resources Development Shandong (Preparatory) Qingdao 266061 China Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Department of Physical Geography and Ecosystem Science Lund University Sölvegatan 12 22362 Lund Sweden Institute of Global Environmental Change Xi’an Jiaotong University Xi’an 710049 China Advanced Institute of Ocean Research Southern University of Science and Technology Shenzhen 518055 China

One of the most challenging problems in paleoclimate research is how orbital cyclicities forced Earth’s climate variations during the late Quaternary. To address this issue, we investigated the differences in silicate weathering, a sensitive climate indicator, at different latitudes on orbital timescales by examining geochemical and clay mineral data from the mid-latitude sea of Okhotsk and integrating published weathering records from low to high latitudes. Results show that silicate weathering in the mid-latitude sea of Okhotsk responded sensitively to both temperature and rainfall, indicating the combined influence of ice sheets and low-latitude monsoons. However, silicate weathering is more sensitive to temperature in high-latitude regions, and to rainfall in tropical areas. Therefore, ice sheets primarily control silicate weathering at high latitudes, whereas monsoon rainfall has greater influences in tropical areas. These findings seem to support the “Milankovitch–Kutzbach” hypothesis, which proposes that ice sheets and monsoons together control orbital-scale climate variations of Earth.

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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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Correction: A remarkably diverse and well-organized virus community in a filter-feeding oyster

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Microbiome 2023年第1期11卷 1-1页

作者： Jiang, Jing-Zhe Fang, Yi-Fei Wei, Hong-Ying Zhu, Peng Liu, Min Yuan, Wen-Guang Yang, Li-Ling Guo, Ying-Xiang Jin, Tao Shi, Mang Yao, Tuo Lu, Jie Ye, Ling-Tong Shi, Shao-Kun Wang, Meng Duan, Ming Zhang, Dian-Chang Key Laboratory of South China Sea Fishery Resources Exploitation and Utilization Ministry of Agriculture and Rural Affairs South China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Guangzhou China College of Fisheries and Life Science Shanghai Ocean University Shanghai China Guangdong Province Key Laboratory for Biotechnology Drug Candidates School of Biosciences and Biopharmaceutics Guangdong Pharmaceutical University Guangzhou China Tianjin Agricultural University Tianjin China Present Address: Shanghai Majorbio Bio-Pharm Technology Co Ltd Shanghai China Guangdong Magigene Biotechnology Co Ltd Guangzhou China School of Medicine Sun Yat-Sen University Shenzhen China Shenzhen Fisheries Development Research Center Shenzhen China Bureau of Agriculture and Rural Affairs of Conghua District Guangzhou China State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan China

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