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Modeling of Active Heave Compensation System of deep-sea Mining based on Dynamic Vibration Absorber and its H∞ Robust Control

Modeling of Active Heave Compensation System of Deep-sea Min...

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2010 International Conference on Computer,Mechatronics,Control and Electronic Engineering(2010计算机、机电、控制与电子工程国际会议 CMCE 2010)

作者： Liujun Li Shaojun Liu College of Mechanical and Electrical Engineering Central South University Changsha Hunan 410083China The State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology ChangshaHunan 410083China

The heave compensation system is vital for the deepsea mining system undergoes excessive vibrations due to irregular wave loads for both normal operating and extreme conditions. To ensure its safety and operation efficiency, a novel active heave compensation system of deep-sea mining based on dynamic vibration absorber was proposed in this paper. The three-degree-of-freedom dynamic models of active heave compensation system based on dynamic vibration absorber in irregular wave are established. A H∞ Robust controller is designed for active heave compensation system by applying robust loop shaping control. The performance of H∞ robust controller and its robustness stability of the system are simulated and analyzed in frequency domain. The results show that the performance of the system in wave energy concentrated frequency domain of China's deep-sea mining field was improved by the concentrated weighting of acceleration output. And it also shows that the designed H∞ controller is perfect in system robustness stability against some parameter fluctuations of the system model. Therefore the designed active heave compensation system is practical to isolate the lift pipe and its support platform from the significant vibration of the ship motion induced by the irregular wave.

关键词： Dynamic Vibration Absorber (DVA) Active Heave Compensation System (AHCS) H∞ Controller deep-sea Mining

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Crystal fractionation of granitic magma during its non-transport processes： A physics-based perspective

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Science China Earth Sciences 2018年第2期61卷 190-204页

作者： CHEN Chen DING Xing LI Rui ZHANG WeiQi OUYANG DongJian YANG Lei SUN WeiDong CAS Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China State Key Laboratory of Lithospherie Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Center of Deep Sea Research Institute of Oceanography Chinese Academy of Sciences Qingdao 266071 China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology Qingdao 266237 China CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences Beijing 100101 China

Granitic continental crust distinguishes the Earth from other planets in the Solar System. Consequently, for understanding terrestrial continent development, it is of great significance to investigate the formation and evolution of *** fractionation is one of principal magma evolution mechanisms. Nevertheless, it is controversial whether crystal fractionation can effectively proceed in felsic magma systems because of the high viscosity and non-Newtonian behavior associated with granitic magmas. In this paper, we focus on the physical processes and evaluate the role of crystal fractionation in the evolution of granitic magmas during non-transport processes, i.e., in magma chambers and after emplacement. Based on physical calculations and analyses, we suggest that general mineral particles can settle only at tiny speed(~10^(-9)–10^(-7) m s^(-1))in a granitic magma body due to high viscosity of the magma; however, the cumulating can be interrupted with convection in magma chambers, and the components of magma chambers will tend to be homogeneous. Magma convection ceases once the magma chamber develops into a mush(crystallinity, F>~40–50%). The interstitial melts can be extracted by hindered settling and compaction, accumulating gradually and forming a highly silicic melt layer. The high silica melts can further evolve into high-silica granite or high-silica rhyolite. At various crystallinities, multiple rejuvenation of the mush and the following magma intrusion may generate a granite complex with various components. While one special type of granites, represented by the South China lithium-and fluoride-rich granite, has lower viscosity and solidus relative to general granitic magmas, and may form vertical zonation in mineral-assemblage and composition through crystal fractionation. Similar fabrics in general intrusions that show various components on small lengthscales are not the result of gravitational settling. Rather, the flowage differentiation may pla

关键词： Granite Crystal fractionation Magma convection Layering structure Mush model Highly fractionated granite Granite complex Li-F granite

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A Three-Step Underwater Moving Target Location Algorithm Based on FDOA 6

A Three-Step Underwater Moving Target Location Algorithm Bas...

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6th International Conference on Wireless Communications and Applications, ICWCAPP 2022

作者： Zhang, Shengrong Zhang, Kun Tian, Chuan Huang, Ju Shen, Chong Sansha Guohai Communication Technology Development Co.Ltd. Hainan Sansha570105 China Hainan University State Key Laboratory of Marine Resources Utilization in South China Sea Hainan Haikou570228 China Key Laboratory of Island Tourism Resource Data Mining and Monitoring Ministry of Culture and Tourism Hainan Tropical Ocean University Hainan Sanya572022 China Institute of Deep-sea Science and Engineering Chinese Academy of Sciences Hainan Sanya572000 China

ISBN: (纸本)9781665462907

The position and velocity estimation of underwater moving targets is an important part of the application of underwater sensor networks. The commonly used fusion of time difference of arrival (TDOA) and angle of arrival (AOA) can only roughly estimate the target position, but also has some limitations for nonlinear problems. So in order to overcome the nonlinear problem and improve the accuracy of underwater target *** on TDOA and AOA, this paper adopts a three-step location method which combines frequency difference of arrival (FDOA).At the same time, the whale algorithm is used to optimize the measurement error based on the weighted least square method (Tswls). Finally, the experimental results show that compared with TDOA location method and tdoa/aoa hybrid location algorithm, this method is superior to the above methods in the accuracy and bias of position and velocity estimation. © 2022 IEEE.

关键词： Time difference of arrival

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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 2024年第6期13卷 3461-3471页

作者： Chuang Pan Kaiying Yang 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 AffairsNational Research and Development Center for Aquatic Product ProcessingSouth China Sea Fisheries Research InstituteChinese Academy of Fishery ScienceGuangzhou 510300China Co-Innovation Center of Jiangsu Marine Bio-industry Technology Jiangsu Ocean UniversityLianyungang 222005China College of Food Science and Technology Guangdong Ocean UniversityZhanjiang 524088China Collaborative Innovation Center of Seafood Deep Processing Dalian Polytechinc UniversityDalian 116034China Key Laboratory of Effi cient Utilization and Processing of Marine Fishery Resources of Hainan Province Sanya Tropical Fisheries Research InstituteSanya 572000China Graduate School of Marine Science and Technology Tokyo University of Marine Science and TechnologyTokyo 1088477Japan

Quality deterioration induced by microbial community in Litopenaeus vannamei during superchilling storage were demonstrated in this *** this study,6 microorganisms were identified as the biomarkers by 16S rDNA sequencing and 71 differential metabolites were identified by untargeted *** 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 ***,the spearman correlation analysis revealed that lightness value had highly significant correlation with Shewanella(P<0.01),and thiobarbituric acid content,total viable count value,total sulfhydryl content,trichloroacetic acid-soluble peptide and Ca2+-ATPase activity showed significantly correlation with Oceanicaulis,Prauserella,Chelativorans,Aliihoefl ea 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.

关键词： Superchilling Psychrophiles Untargeted metabolomics Litopenaeus vannamei Quality

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Distinct and shared endothermic strategies in the heat producing tissues of tuna and other teleosts

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Science China(Life Sciences) 2023年第11期66卷 2629-2645页

作者： Baosheng Wu Xueli Gao Mingling Hu Jing Hu Tianming Lan Tingfeng Xue Wenjie Xu Chenglong Zhu Yuan Yuan Jiangmin Zheng Tao Qin Peidong Xin Ye Li Li Gong Chenguang Feng Shunping He Huan Liu Haimeng Li Qing Wang Zhenhua Ma Qiang Qiu Kun Wang School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710072China South China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesGuangzhou 510300China State Key Laboratory of Agricultural Genomics BGI-ShenzhenShenzhen 518083China BGI Life Science Joint Research Center Northeast Forestry UniversityHarbin 150006China National Engineering Laboratory of Marine Germplasm Resources Exploration and Utilization Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316022China Institute of Deep-Sea Science and Engineering Chinese Academy of SciencesSanya 572000China The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China

Although most fishes are ectothermic,some,including tuna and billfish,achieve endothermy through specialized heat producing tissues that are modified *** these heat producing tissues evolved,and whether they share convergent molecular mechanisms,remain ***,we generated a high-quality genome from the mackerel tuna(Euthynnus affinis)and investigated the heat producing tissues of this fish by single-nucleus and bulk RNA *** with other teleosts,tuna-specific genetic variation is strongly associated with muscle ***-nucleus RNA-seq revealed a high proportion of specific slow skeletal muscle cell subtypes in the heat producing tissues of *** genes of this cell subtype are associated with the relative sliding of actin and myosin,suggesting that tuna endothermy is mainly based on shivering *** contrast,cross-species transcriptome analysis indicated that endothermy in billfish relies mainly on nonshivering ***,the heat producing tissues of the different species do share some tissue-specific genes,including vascular-related and mitochondrial ***,although tunas and billfishes differ in their thermogenic strategies,they share similar expression patterns in some respects,highlighting the complexity of convergent evolution.

关键词： endothermy tuna convergent evolution divergent strategies heat producing tissues

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A new development direction of deep sea exploration vessels 31st

A new development direction of deep sea exploration vessels

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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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Motion control of thruster-driven underwater vehicle based on Model Predictive Control

Motion control of thruster-driven underwater vehicle based o...

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IEEE International Conference on Cyber technology in Automation, Control, and Intelligent Systems

作者： Xing Jin Kaizhou Liu Yingbin Feng Yan Huang Yang Zhao Shengguo Cui Guang Yuan State Key Laboratory of Exploitation and Utilization of Deep-sea Mineral Resources Changsha Research Institute of Mining and Metallurgy Co. Ltd Changsha China State Key Laboratory of Robotics Chinese Academy Sciences Shenyang China School of Information Science & Engineering Northeastern University Shenyang China

ISBN: (纸本)9781509027347

Underwater vehicles have been developed over the last six decades for potential uses in scientific, commercial, environmental, and military purposes, and always utilized to perform difficult tasks in cluttered environments such as deep-sea mining, underwater sampling and oceanic investigations. Since underwater vehicles have nonlinear and highly coupled dynamics, motion control can be difficult when completing complex tasks. This paper describes the implementation of a model predictive controller novel in a class of thruster-driven underwater vehicle. In this paper, a constrained discrete-time model predictive control method is employed for the motion control of thruster-driven underwater vehicles. A nonlinear model in six degree of freedom is established based on the dynamics of human occupied vehicle Jiao-long, and converted into a state space model after practical simplification. To ensure the performance of model predictive controller, a full feedback state observer is established to observe the state. In addition, Hildreth's quadratic programming algorithm is incorporated for solving the optimal control sequence, which greatly reduced the computation of the model predictive control algorithm. In order to show the effectiveness of the motion control method, simulations based on dynamics of human occupied vehicle Jiao-long are conducted. Performance on depth control, heading control and hovering control are evaluated. All the results demonstrate the effectiveness of the method.

关键词： Underwater vehicles Vehicles Motion control Optimal control Mathematical model Vehicle dynamics Heuristic algorithms

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Research on Trajectory Smoothing Optimization Algorithm of Underwater Long Baseline Positioning System 22

Research on Trajectory Smoothing Optimization Algorithm of U...

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22nd IEEE International Conference on Communication technology, ICCT 2022

作者： Zhang, Kun Zhang, Shengrong Huang, Ju Shen, Chong School of Information Science and Technology Hainan Normal University Hainan Haikou571158 China Sansha Guohai Communication Technology Development Co.Ltd. Hainan Sansha570105 China State Key Laboratory of Marine Resources Utilization in South China Sea Hainan University Hainan Haikou570228 China Key Laboratory of Island Tourism Resource Data Mining and Monitoring Ministry of Culture and Tourism Hainan Tropical Ocean University Hainan Sanya572022 China

ISBN: (纸本)9781665470674

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. © 2022 IEEE.

关键词： Underwater acoustics

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Exploitation and utilization scheme of Zr-Ti placers in Baoding sea

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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 277-284页

作者： Zeng, Xuan Yang, Ning Jin, Xing Zhang, Ming State Key Laboratory of Exploitation and Utilization of Deep-Sea Mineral Resources Changsha 410012 China Research Department of Exploitation and Utilization of Deep-Sea Mineral Resources Changsha Research Institute of Mining and Metallurgy Co. Ltd. Changsha 410012 China

The Zi-Ti placer in Baoding sea, Wanning, Hainan Province, China, was analyzed in various aspects such as its general situation, mine reserve, product demand, geological structure, marine hydrometeorology, mining technology and technical economics. Based on these elaborated analysis, a practical scheme was proposed for the exploration of offshore placers in large scales and the use of deep sea mining technologies, including offshore producing, pipeline transportation and tailing deposal. In addition, it is suggested that rougher concentrate by a combined heavy separation process of screen separating-spiral concentration employed in the fire-suction ship on which placers are mined is shipped by dumping barges to the coast, and fined by another combined process of high intensity magnetic separation-wet process-magnetic electric joint separation, while the tailings are pipeline-transported to backfill the underground goafs. Solutions are provided as well according to offshore working safety and environmental impacts.

关键词： Environmental impact

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Genomic and metabolic analysis of fluoranthene degradation pathway in Celeribacter indicus P73T

Genomic and metabolic analysis of fluoranthene degradation p...

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福建省海洋学会2016年学术年会

作者： Junwei Cao Qiliang Lai Jun Yuan Zongze Shao State Key Laboratory Breeding Base of Marine Genetic Resources Key Laboratory of Marine Genetic Resources The Third Institute of State Oceanic Administration Key Laboratory of Marine Genetic Resources of Fujian Province Collaborative Innovation Center of Deep Sea Biology Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources School of Municipal and Environmental Engineering Harbin Institute of Technology

Celeribacter indicus P73,isolated from deep-sea sediment from the Indian Ocean,is capable of degrading a wide range of polycyclic aromatic hydrocarbons（PAHs） and is the first fluoranthene-degrading bacterium within the family ***,the complete genome sequence of strain P73 is presented and *** a 4.5-Mb circular chromosome,strain P73 carries five plasmids,and encodes 4827 predicted protein-coding *** hundred and thirty-eight genes,including 14 dioxygenase genes,were predicted to be involved in the degradation of aromatic compounds,and most of these genes are clustered in four regions.P730346 is the first fluoranthene 7,8-dioxygenase to be discovered and the first fluoranthene dioxygenase within the toluene/biphenyl *** degradative genes in regions B and D in P73 are absent in Celeribacter baekdonensis B30,which cannot degrade *** intermediate metabolites[acenaphthylene-l（2H）-one,acenaphthenequinone,1,2-dihydroxyacenaphthylene,and 1,8-naphthalic anhydride]of fluoranthene degradation by strain P73 were detected as the main intermediates,indicating that the degradation of fluoranthene in P73 was initiated by dioxygenation at the C-7,8 *** on the genomic and metabolitic results,we propose a C-7,8 dioxygenation pathway in which fluoranthene is mineralized to TCA cycle intermediates.

关键词： Genomic and metabolic analysis of fluoranthene degradation pathway in Celeribacter indicus P73T

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