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Experimental investigation of the inhibition of deep-sea mining sediment plumes by polyaluminum chloride

International Journal of Mining Science and Technology 2024年第1期34卷 91-104页

作者： Fengpeng Zhang xuguang Chen Jiakang Wei Yangyang Zhang weikun xu Hao Li College of Engineering Ocean University of ChinaQingdao 266100China Shandong Province Key Laboratory of Ocean Engineering Ocean University of ChinaQingdao 266100China China Merchants Marine and Offshore Research Institute Co. Ltd.Shenzhen 518000China National Deep Sea Center Qingdao 266237China

Deep-sea sediment disturbance may occur when collecting polymetallic nodules,resulting in the creation of plumes that could have a negative impact on the ecological *** study aims to investigate the potential solution of using polyaluminum chloride(PAC)in the water *** effects of PAC are examined through a self-designed simulation system for deep-sea polymetallic nodule collection and sediment samples from a potential deep-sea mining *** experimental results showed that the optimal PAC dose was found to be 0.75 g/*** with the test conditions without the addition of PAC,the presence of PAC leads to a reduction in volume,lower characteristic turbidity,smaller diffusion velocity,and shorter settling time of the *** indicates that PAC inhibits the entire development process of the *** addition of PAC leads to the flocculation of mm-sized particles,resulting in the formation of cm-sized *** flocculation of particles decreases the rate of erosion on the seabed by around 30%.This reduction in erosion helps to decrease the formation of ***,when the size of suspended particles increases,it reduces the scale at which they ***,the settling velocity of flocs(around 10^(-2) m/s)is much higher that of compared to sediment particles(around 10^(-5) m/s),which effectively reduces the amount of time the plume remains in suspension.

关键词： Deep-sea mining Deep-sea polymetallic nodules Sediment plume Polyaluminum chloride Jet impact Particle flocculation

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海洋大数据的智慧平台设计及关键技术分析

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集成电路应用 2024年第6期41卷 128-129页

作者：周玉斌王建村胥维坤黄云明国家深海基地管理中心山东266237 中科院深海科学与工程研究所海南572000

阐述智慧海洋大数据平台的设计,基于海洋数据采集、存储与管理、分析与挖掘等关键技术展开分析。提出采用多源海洋数据采集技术,结合分布式存储与管理技术,构建智慧海洋大数据平台。

关键词：智慧海洋大数据技术系统平台框架

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Geological context and vents morphology in the ultramafic-hosted Tianxiu field, Carlsberg Ridge

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Acta Oceanologica Sinica 2023年第9期42卷 62-70页

作者： Jin Liang Chunhui Tao Xiangxin Wang Cheng Su Wei Gao Yadong Zhou weikun xu Xiaohe Liu Zhongjun Ding Key Laboratory of Submarine Geosciences Ministry of Natural ResourcesHangzhou 310012China Second Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China National Deep Sea Center Qingdao 266237China School of Earth Sciences Zhejiang UniversityHangzhou 310027China Ocean College Zhejiang UniversityZhoushan 316021China

The Tianxiu hydrothermal field(TXHF) located on Carlsberg Ridge is one of the few active ultramafic-hosted venting systems known in the Indian Ocean. Despite numerous investigations, there is limited understanding of its sulfide structure morphology, and the factors controlling the formation of TXHF are poorly understood. In this study, we conducted detailed seafloor mapping using visual data obtained by dives using the human-occupied vehicle(HOV) Jiaolong. The TXHF is found to be an active, off-axis, ultramafic-hosted, high-temperature hydrothermal area in which serpentine peridotite is exposed. Two main hydrothermal sites were identified, i.e., P and Y, both of which feature a complex of chimneys and beehive diffusers constituting a “chimney jungle” and isolated large steep-sided structures developed on flat-lying sulfide mounds. In addition, some sporadic inactive chimneys and outcrops of hydrothermal deposits were noted. The chimneys are rich in Fe and Zn sulfide, and lack the central fluid channel formed by focused high-temperature fluid flow. Hydrothermal venting at TXHF is likely related to low-angle detachment faults that focus and transport hydrothermal fluids away from a heat source along the valley wall. Our results complement and expand upon previous works concerning sulfide chimney morphology and their corresponding mineral paragenesis in ultramafic-hosted hydrothermal systems in the Indian Ocean and further our understanding of modern seafloor hydrothermal systems.

关键词： hydrothermal activity sulfide accumulation morphology ultramafic-hosted Carlsberg Ridge

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MYC转录因子在植物逆境响应中的作用

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高师理科学刊 2024年第4期44卷 97-100,110页

作者：曹佳昂邵庆一杨森陈宇姝张军保王雪松田铭徐维坤刘丽杰齐齐哈尔大学生命科学与农林学院黑龙江齐齐哈尔161006

在植物生长和发育过程中,经常会受到低温、干旱、盐渍等非生物胁迫和病虫害等生物胁迫的影响,植物有一系列的代谢途径来应对这些胁迫.许多研究表明,植物在面对逆境胁迫时,bHLH转录因子超家族中的MYC转录因子家族参与响应了多种胁迫反应... 详细信息

在植物生长和发育过程中,经常会受到低温、干旱、盐渍等非生物胁迫和病虫害等生物胁迫的影响,植物有一系列的代谢途径来应对这些胁迫.许多研究表明,植物在面对逆境胁迫时,bHLH转录因子超家族中的MYC转录因子家族参与响应了多种胁迫反应,对植物的生长发育起到重要作用.对近年来MYC转录因子家族的结构和功能以及在植物逆境响应中发挥的作用进行阐述,旨在为后续揭示其响应植物抗逆的研究提供理论依据和实践参考.

关键词： MYC转录因子生物胁迫非生物胁迫

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长链非编码RNA参与植物胁迫应答的研究进展

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高师理科学刊 2024年第6期44卷 92-96页

作者：杨森王雪松徐维坤邵庆一曹佳昂陈宇姝张军保田铭刘丽杰齐齐哈尔大学生命科学与农林学院黑龙江齐齐哈尔161006

长链非编码RNAs(long non-coding RNAs,lncRNAs)是一类长度超过200 nt,不具备蛋白质编码潜力的调节性RNA.由于lncRNAs的序列保守性较差、表达量较低,因此早期被认为是某种转录副产物,不参与生物生命活动的调节.但随着研究的深入,lncRNA... 详细信息

长链非编码RNAs(long non-coding RNAs,lncRNAs)是一类长度超过200 nt,不具备蛋白质编码潜力的调节性RNA.由于lncRNAs的序列保守性较差、表达量较低,因此早期被认为是某种转录副产物,不参与生物生命活动的调节.但随着研究的深入,lncRNAs独特的生物学特性及功能陆续被发现,多数研究学者认为lncRNAs是一种在生物体中普遍存在且参与基因调控的重要组分,lncRNAs能够通过充当分子海绵、信号分子和引导分子来参与生物体中的基因调控.通过探索lncRNAs的功能将进一步完善植物响应不利环境过程中的分子调控机制,因此主要阐述了lncRNAs的来源、作用机制及其在植物生物胁迫与非生物胁迫中的作用,为明晰lncRNAs调控植物胁迫应答的调控机制提供理论依据和参考.

关键词：植物长链非编码RNA 非生物胁迫生物胁迫

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外源激素对植物性别分化的影响

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高师理科学刊 2024年第5期44卷 82-86页

作者：邵庆一曹佳昂杨森张军保陈宇姝王雪松田铭徐维坤刘丽杰齐齐哈尔大学生命科学与农林学院黑龙江齐齐哈尔161006

在开花植物中,性别表达是区分雄花和雌花的重要过程.激素可影响植物性别的转变或可塑性,大量的植物激素涉及花性别鉴定基因和发育通路,对植物发育过程中花性别分化具有重要意义.主要综述五种植物激素(如生长素、赤霉素、细胞分裂素、乙... 详细信息

在开花植物中,性别表达是区分雄花和雌花的重要过程.激素可影响植物性别的转变或可塑性,大量的植物激素涉及花性别鉴定基因和发育通路,对植物发育过程中花性别分化具有重要意义.主要综述五种植物激素(如生长素、赤霉素、细胞分裂素、乙烯、脱落酸等)在植物性别分化中的作用.外源生长调节物质还可以通过调节有关酶的活性和内源激素的水平来影响植物性别分化.赤霉素可促进部分植物的雄性表达,生长素、脱落酸、乙烯及细胞分裂素可促进部分植物的雌性表达.为揭示激素对性别分化的影响的分子调控机制奠定了基础.

关键词：高等植物植物激素性别分化

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Effect of Sodium Chloride on Enhanced Performance of Chitosan-Based Ion Actuator

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Journal of Harbin Institute of Technology(New series) 2024年

作者： Zhaoyang Cui Xiaoli Zhao weikun Jia Yueming Ren Yan xu Yanzhuo Lv College of Mechanical and Electrical Engineering， Harbin Engineering University College of Material Science and Chemical Engineering， Harbin Engineering University

In this work， an actuate membrane and an electrode membrane were prepared by a sol-gel method. And then， they were physically pressed to form a chitosan-based ion actuator (CSIA). Importantly， the effect of sodium chloride on CSIA were investigated， the mechanical properties of CSIA were tested by establishing an output force test platform and a displacement test platform while testing its porosity. And， the electrochemical performance was tested by electrochemical workstation. At the end， the surface morphology and functional groups were measured by scanning electron microscopy and Infrared spectrogram， respectively. The results indicated that the molar concentration of the sodium chloride was the best at 0.06836 mol·L-1for CSIA. Its mechanical properties could reach an output force of 2.939 mN and a deflection displacement of 4.025 mm， and the maximum porosity of 12.98% at the same time. The specific capacitance of the electrochemical performance was up to 0.07719 F·g-1， and the minimum resistance reached 13.48 Ω. From the surface morphology and functional groups， the appropriate doping ratio of NaCl into CSIA was helpful for increasing the transport space of internal ions. The effective internal ion concentration and significantly reduced internal stress provided excellent performances under the appropriate voltage conditions. The doping of inorganic ion sodium chloride improved the internal electron transport efficiency of chitosan ion actuator， and it advanced the mechanical properties of the actuator. Hence the enhancement of NaCl output force in CSIA had a good significance for the development of inorganic salt ion strengthened ion actuator.

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深海硅藻土强度特性及其对光缆沉陷的影响

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岩土工程学报 2023年第10期45卷 2194-2200页

作者：谢雅囡裴会敏王栋孙永福高伟胥维坤中国海洋大学海洋环境与生态教育部重点实验室山东青岛266100 国家深海基地管理中心山东青岛266237

深海硅藻土是一种深海生物硅藻成因的硅质软泥,其典型特征是含水率大、强度低。采用流体力学中的流变模型描述硅藻土,并通过流变试验建立起不排水抗剪强度与剪应变速率之间的关系,试验中还发现硅藻土具有一定的灵敏度。当光缆铺设在深... 详细信息

深海硅藻土是一种深海生物硅藻成因的硅质软泥,其典型特征是含水率大、强度低。采用流体力学中的流变模型描述硅藻土,并通过流变试验建立起不排水抗剪强度与剪应变速率之间的关系,试验中还发现硅藻土具有一定的灵敏度。当光缆铺设在深海硅藻土上时,必须合理估计光缆的沉陷。采用大变形有限元方法模拟光缆与硅藻土的相互作用,其中引入考虑速率效应与应变软化的公式。基于数值结果,讨论影响光缆贯入阻力的因素和不同灵敏度下的光缆沉陷量,给出了两种典型铠装光缆在硅藻土中的沉陷量范围。

关键词：硅藻土应变率效应灵敏度有限元沉陷

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Riverine sulfate sources and behaviors in arid environment,Northwest China:Constraints from sulfur and oxygen isotopes

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Journal of Environmental Sciences 2024年第3期137卷 716-731页

作者： Yifu xu Wenjing Liu Bing xu Zhifang xu Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

The fate of riverine sulfate ion (SO_(4)^(2-)) and its environmental effects in arid environment are difficult to evaluate due to its complicated sources and strongly coupled behaviors with water cycle which is significantly modified by *** understand the sulfur cycle in aquatic systems in arid environment,the chemical and sulfur and oxygen isotopic compositions (δ^(34)S_(SO4)and δ^(18)O_(SO4)) of major rivers around the Badain Jaran Desert,northwestern China,were *** rivers had averaged SO_(4)^(2-)content at 1336μmol/L,over 10times higher than the global *** δ^(34)S_(SO4)and δ^(18)O_(SO4)values ranged from-5.3‰to+11.8‰and+1.6‰to+12.8‰,*** end-member analysis and the inverse model showed that riverine sulfate was mainly derived from evaporites dissolution (0-87%),sulfide oxidation (13%-100%) and precipitation (0-33%),indicating heterogeneity in sulfur sources and behaviors along the river drainage with the lithology variations and climate *** isotopic tools combining with hydro-chemistry compositions could be applied to reveal sulfur cycle in arid *** on the calculation,sulfide oxidation plays the primary role in the headwater and upstream in the Qilian-Mountains area,where sulfide is widely *** the proportion of evaporites dissolution contributing to riverine sulfate is much higher in downstream in a drier ***,less precipitation and higher temperature can lead to more intensive evaporation,affecting the process of sulfide oxidation and enhancing the rates of evaporites dissolution and sulfate precipitation in the basin.

关键词： Sulfur and oxygen isotopes Source apportionment Inverse model Arid environment Inland rivers Northwestern China

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Laboratory evaluation of high-friction thin overlays for pavement preservation

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Frontiers of Structural and Civil Engineering 2024年第6期18卷 936-948页

作者： Ouming xu Rentao xu Lintong JIN School of Highway Chang’an UniversityXi’an 710064China School of Materials Science and Engineering Chang’an UniversityXi’an 710061China

Traditional asphalt concrete(AC)and stone matrix asphalt(SMA),which are used as thin asphalt overlays,are common maintenance strategies to enhancing ride quality,skid resistance,and ***,several studies have used a novel asphalt mixture known as a high-friction thin overlay(HFTO)to improve surface ***,it remains uncertain whether the laboratory properties of HFTO differ significantly from those of conventional *** study aims to evaluate the laboratory properties of HFTO mixtures and compare them with those of AC and *** mixtures with nominal maximum size of 9.5 mm were produced in the laboratory,and performance tests were conducted,including wheel tracking test,low temperature flexural creep test,moisture susceptibility test,Cantabro Abrasion Test,Marshall Test,sand patch test,British pendulum test,and indoor tire-rollingdown *** results showed that the HFTO exhibited a lower tire/pavement noise than the AC and ***,HFTO had superior high-temperature stability,larger macro texture,and higher skid resistance in comparison to those of AC,but lower than those of ***,HFTO mixtures may be considered a suitable replacement for traditional AC mixtures in regions where skid resistance and noise reduction are concerns.

关键词： road engineering pavement maintenance high friction thin overlay performance skid resistance tire/pavement noise

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