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Spatiotemporal distribution patterns of macrobenthic communities and their relationship with environmental factors in the Shengsi Archipelago(Zhejiang,China)

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Acta Oceanologica Sinica 2025年第1期44卷 113-126,I0001-I0011页

作者： Lingxiang Jin Yibo Liao Peisong Yu Yanbin Tang Qinghe Liu Rongliang Zhang Lu Shou Jiangning Zeng Quanzhen Chen Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Key Laboratory of Ocean Space Resource Management Technology Ministry of Natural ResourcesHangzhou 310012China Laboratory of Nearshore Engineering Environment and Ecological Security of Zhejiang Province Hangzhou 310012China

Macrobenthic organisms are commonly employed as biomonitors for environmental risk *** this study,we aimed to investigate the spatial and temporal patterns of the macrobenthic community,which is influenced by environmental factors of sediments and bottom water *** sampled a total of 12,11,10,and 11 stations in the Shengsi Archipelago during June 2010,August 2010,November 2020,and April 2021 respectively.A total of 124 species of macrobenthos were identified,with polychaetes being the dominant *** abundance,biomass,and diversity indices exhibited no significant temporal ***,biodiversity did not exhibit a clear spatial gradient,likely due to the small study area and the absence of significant differences in key factors such as ***,the stations with the lowest biodiversity values consistently appeared in the southwest region,possibly due to the impact of human *** differences in the macrobenthic community were observed between all months except between June and August,and mollusk Endopleura lubrica and polychaete Sigambra hanaokai were important contributors to these differences according to the results of the Similarity Percentages *** particulate matter(SPM)was identified as the primary driving factors of macrobenthic *** summary,the community structure underwent temporal changes influenced by complex current patterns,while biodiversity remained relatively *** study contributes to our understanding of the key environmental factors affecting macrobenthic communities and *** also provides valuable data support for the long-term monitoring of macrobenthos and the environment in the Shengsi Archipelago.

关键词： macrobenthic community Shengsi Archipelago distribution pattern biodiversity environmental factors

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Spatial and Temporal Distribution of Metal Elements in the Rivers of Northern Jiangsu Province

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Journal of Ocean University of China 2025年第1期24卷 157-168页

作者： YUAN Liping LIU Qian JIAN Huimin MI Tiezhu YANG Fuxia YAO Qingzhen Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and TechnologyMinistry of EducationOcean University of ChinaQingdao 266100China Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation of the Ministry of Ecology and Environment Shandong Academy for Environmental PlanningJinan 250101China

The concentrations of V,Cr,Mn,Fe,Co,Ni,Cu,Zn,As,Mo,Cd,and Pb were determined in Doulonggang River,Xinyanggang River,Huangshagang River,Sheyanghe River,Guangaizongqu River,and Linhonghe River at the North of Jiangsu Province in *** annual average concentrations of V,Cr,Mn,Fe,Co,Ni,Cu,Zn,As,Mo,Cd and Pb in the six rivers were 2.20,1.22,4.53,21.9,0.13,2.79,1.77,4.00,2.97,3.87,0.01,0.19μg L^(-1)*** highest concentration of most trace metals were found in Guangaizongqu River and Linhonghe River,and the lowest concentration were found in Xinyanggang River and Huangshagang *** principal component analysis(PCA)resulted of two factors together explained 91.2%of the variance with>1initial eigenvalue,indicating that both natural and anthropogenic activities were contributing factors as the source of metal abundance in rivers of northern Jiangsu *** first major component represented the influence of anthropogenic activities,including industry and agriculture,with a contribution rate of 54.1%,affected Cr,Fe,Cu,Zn,Mo,Cd and *** second(such as V,Mn,Co,Ni,As)was a mixed source,including the natural processes such as precipitation,erosion and weathering and anthropogenic action like industry and agriculture,with a contribution rate of 37.1%.Seasonal variations in trace metal concentrations were influenced by temperature,salinity,water discharge,and input of external *** highest concentrations were found in wet season and were strongly influenced by rainfall and seasonal industrial and agricultural activities.

关键词： trace metal distribution rivers northern Jiangsu Province

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Non-uniform electron density estimation based on electromagnetic wave attenuation in plasma

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Chinese Physics B 2025年第1期34卷 381-386页

作者： Zhaoying Wang Lixin Guo Maixia Fu Shaoshuai Guo Yinsheng Li Key Laboratory of Grain Information Processing and Control(Henan University of Technology) Ministry of EducationZhengzhou 450001China College of Information Science and Engineering Henan University of TechnologyZhengzhou 450001China School of Physics Xidian UniversityXi’an 710071China

The surface of a high-speed vehicle reentering the atmosphere is surrounded by plasma *** to the influence of the inhomogeneous flow field around the vehicle,understanding the electromagnetic properties of the plasma sheath can be *** the electron density of the plasma sheath is crucial for understanding and achieving plasma stealth of *** this work,the relationship between electromagnetic wave attenuation and electron density is deduced *** attenuation distribution along the propagation path is found to be proportional to the integral of the plasma electron *** result is used to predict the electron density ***,the average electron density is obtained using a back-propagation neural network ***,the spatial distribution of the electron density can be determined from the average electron density and the normalized derivative of attenuation with respect to the propagation *** to traditional probe measurement methods,the proposed approach not only improves efficiency but also preserves the integrity of the plasma environment.

关键词： attenuation electromagnetic propagation plasma electron density

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A review of motion planning for redundant space manipulators

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Science China(Technological Sciences) 2025年第3期68卷 30-53页

作者： Ziqiang ZHANG Xiaoshuo LIU Meng NING Xiaohui LI Weihui LIU Ye LU College of Mechanical and Energy Engineering Beijing University of TechnologyBeijing100124China School of Mechanical Engineering Jiangnan UniversityWuxi214122China Beijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms Beijing Institute of Control EngineeringBeijing100094China Department of Civil Engineering Monash UniversityMelbourne3800Australia

Redundant space manipulators(RSM)exhibit high flexibility and can assist astronauts in completing various onorbit service(OOS)tasks,which have been applied to the International Space Station(ISS)and China Space Station(CSS).Motion planning stands as a fundamental technology within RSM,guiding the manipulator to reach designated positions smoothly and execute operational tasks with optimal ***,the intricate nature of the space environment presents challenges to the motion planning of *** this paper,in response to issues such as maintenance difficulties after RSM failures,base floating caused by weightlessness,flexible deformation of structures due to large-scale operations,and multiple obstacles with uncertainty,fault-tolerant motion planning,motion planning considering base floating,motion planning under structural flexibility deformation,and obstacle avoidance motion planning are *** present,the increasingly complex OOS tasks have brought new challenges to the motion planning of *** challenges encompass motion planning for new mechanism configurations,dynamic motion planning,multi-RSM and multi-task planning,the improvement of motion planning efficiency,and the efficient implementation and precise process monitoring of *** the advancement of motion planning technology,RSM is poised to play an increasingly significant role in ISS and CSS.

关键词： redundant space manipulator on-orbit service motion planning main challenges

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Cr doping modification for tribological behavior of Cr/a-C multilayer coatings against PEEK under diverse operational conditions

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Friction 2025年第3期13卷 117-126页

作者： Xiaohui Zhou Yingpeng Zhang Hao Li Li Cui Wei Yang Aiying Wang Peng Guo Peiling Ke Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Considering the increasing demand for wearresistant materials used for various frictions with dynamic sealing parts,we employed hybrid magnetron sputtering technology to fabricate Cr/amorphous carbon(a-C)multilayered coatings with and without Cr doping for *** tribological behaviors of coatings paired with polyether ether ketone(PEEK)balls were investigated under different friction environments,including an evolving atmosphere,a NaCl solution,polyalphaolefin(PAO)oil,and water-in-oil(W/O).The results demonstrated that the tribological properties of all friction pairs were strongly influenced by the surrounding *** the atmosphere and in a NaCl solution,the addition of Cr promoted the formation of a-C-containing transfer films,thereby yielding stable and low friction ***,the dominant factor contributing to the tribological performance shifted from the coatings themselves to the PAO oil film with PAO *** the case of the W/O solution,both the facile reactivity of Cr and the intrinsic instability of the W/O mixture accelerated the presence of Cr_(2)O_(3),which caused more severe *** current observations not only identified the tribological failure mechanism of Cr/a-C coatings with and without Cr doping modifications in conjunction with their PEEK counterparts but also addressed the importance of designing and fabricating adaptive lubricant coatings for harsh multi-environment applications.

关键词： polyether ether ketone(PEEK) amorphous carbon polyalphaolefin(PAO)oil dynamic sealing tribo-chemistry

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Geometric attitude tracking control of quadrotor UAVs with adaptive extended state observers

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ISA Transactions 2025年 160卷 289-297页

作者： Wang, Liping Chen, Jiapeng Huang, Yuyuan Zhu, Yongbin Pei, Hailong Key Laboratory of Autonomous Systems and Networked Control Ministry of Education Unmanned Aerial Vehicle Systems Engineering Technology Research Center of Guangdong School of Automation Science and Engineering South China University of Technology Guangzhou510640 China

This paper studies a geometric attitude tracking control problem of quadrotor unmanned aerial vehicles (UAVs) with adaptive extended state observers (AESOs). Through coordinate transformation, the error dynamic of AESO can be transformed into a canonical form which is easier to analyze by linear time-varying theory. In the presence of unknown disturbances and system uncertainties, the estimated error and stability of AESO can be analyzed. Simultaneously, a geometric tracking controller is developed on SO(3) with AESOs which guarantees that the error exponentially converges to a bounded set related to the estimated error. Some examples and a flight test are given to verify the availability of the control scheme. © 2025

关键词： Unmanned aerial vehicles (UAV)

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Bioaccessibility and health risk assessment of hydrophobic organic pollutants in soils from four typical industrial contaminated sites in China

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Journal of Environmental Sciences 2025年第1期147卷 282-293页

作者： Shi-Ping Ou Xiao-Liang Liao Zi-Tao Huang Yan-Cong Hu Zongwei Cai Zhi-Feng Chen Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China State Key Laboratory of Environmental and Biological Analysis Department of ChemistryHong Kong Baptist UniversityHong Kong 999077China

There have been reports of potential health risks for people from hydrophobic organic pollutants,such as polycyclic aromatic hydrocarbons(PAHs),polychlorinated hydrocarbons(PCHs),and organophosphate flame retardants(OPFRs).When a contaminated site is used for residential housing or public utility and recreation areas,the soil-bound organic pollutantsmight pose a threat to human *** this study,we investigated the contamination profiles and potential risks to human health of 15 PAHs,6 PCHs,and 12 OPFRs in soils from four contaminated sites in *** used an in vitro method to determine the oral bioaccessibility of soil *** PAHswere found at concentrations ranging from26.4 ng/g to 987 ng/***(0.27-14.3 ng/g)and OPFRs(6.30-310 ng/g)were detected,but at low levels compared to earlier *** levels of PAHs,PCHs,and OPFRs released from contaminated soils into simulated gastrointestinal fluids ranged from 1.74%to 91.0%,2.51%to 39.6%,and 1.37%to 96.9%,*** on both spiked and unspiked samples,we found that the oral bioaccessibility of pollutantswas correlated with their logKow andmolecularweight,and the total organic carbon content and pH of *** in 13 out of 38 contaminated soil samples posed potential high risks to *** considering oral bioaccessibility,nine soils still posed potential risks,while the risks in the remaining soils became *** contribution of this paper is that it corrects the health risk of soil-bound organic pollutants by detecting bioaccessibility in actual soils from different contaminated sites.

关键词： Contaminated soil Hydrophobic organic pollutant Polycyclic aromatic hydrocarbon Oral bioaccessibility Risk assessment

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Penijanacoranes A-F,Acorane-Type Sesquiterpenes from a Deep Sea-Derived Fungus Penicillium janthinellum SH0301

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Chinese Journal of Chemistry 2025年第3期43卷 268-274页

作者： Lu-Jia Yang Ling Lv Zhuang Han Yu-Cheng Gu Xin Li Chang-Lun Shao Zhi-Qing Liu Chang-Yun Wang MOE Key Laboratory of Marine Drugs and Key Laboratory of Evolution and Marine Biodiversity School of Medicine and PharmacyInstitute of Evolution&Marine BiodiversityOcean University of ChinaQingdaoShandong266003 China Laboratory for Marine Drugs and Bioproducts Qingdao Marine Science and Technology CenterQingdaoShandong266237 China Institute of Deep-sea Science and Engineering Chinese Academy of SciencesSanyaHainan572000 China Syngenta Jealott's Hill International Research Centre BracknellBerkshireRG426EY United Kingdom

Six new acorane-type sesquiterpenes,named penijanacoranes A—F(1—6),as well as one known eudesmane sesquiterpenoid 1α,6β,11-eudesm-triol(7)have been isolated from a deep-sea-derived fungus Penicillium janthinellum *** structures and absolute configurations were established by the comprehensive spectroscopic analysis,TDDFT-ECD calculations,and X-ray *** A(1)was identified as a rare acorane-type sesquiterpene lactone featuring a novel 6/5/6 tricyclic system,while penijanacoranes E and F(5 and 6)represented undescribed examples of nor-acorane sesquiterpenes at *** C(3)exhibited significant inhibitory activity against LPS-induced NO production in Raw264.7 macrophages with an IC_(50)value of 6.23μM,which was more potent than that of positive control dexamethasone(IC_(50)=11.49μM).This study expanded the chemical diversity of acorane-type sesquiterpenoids and revealed that compound 3 was a potential molecule for anti-inflammatory agents.

关键词： Natural products Acorane-type sesquiterpene Structure elucidation Deep-sea-derived fungus Penicillium janthinellum Biological activity Anti-inflammatory activity

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DOA Estimation Exploiting a Single Moving Acoustic Vector Sensor: A Cramér-Rao Bound-Based Study

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IEEE Transactions on Vehicular technology 2025年第5期74卷 7508-7523页

作者： Qu, Xinghao Shang, Zhigang Qiao, Gang Liu, Songzuo National Key Laboratory of Underwater Acoustic Technology Harbin Engineering University Harbin150001 China Harbin Engineering University Ministry of Industry and Information Technology Key Laboratory of Marine Information Acquisition and Security Harbin150001 China Harbin Engineering University College of Underwater Acoustic Engineering Harbin150001 China Sanya Nanhai Innovation and Development Base of Harbin Engineering University Sanya572024 China

Motivated by the emerging interest in direction-of-arrival (DOA) estimation exploiting array motions, this paper investigates a practical application scenario involving a single moving acoustic vector sensor (AVS). By reasonably arranging observations at different times, we construct a flexible measurement model for the resulting dual-AVS synthetic array. Since multiple components of an AVS are physically co-located, incorporating a synthetic aperture via the translation motion can contribute to remarkable performance improvement. Aiming at an explicit analysis, we delve into the corresponding Cramér-Rao bound (CRB) in the single-source case and formulate a CRB optimization problem to determine the optimal measurement model. Thanks to significant simplifications, we derive a closed-form CRB expression, which provides insight into the system performance and favors the analytical solution of the optimization problem. Regarding DOA estimation, especially for the spatially nonuniform noise specific to AVSs, we propose a weighted maximum likelihood estimator (WMLE) to fully leverage the promised theoretical gain in terms of the CRB. Further noting the intrinsic relationship between the WMLE performance and array data arrangement, we design a two-phase iterative procedure that updates the DOA estimate and the measurement matrix structure alternately to approximate the global optimal solution. Numerical experiments corroborate our analytical derivations and validate the statistical efficiency of the proposed methods. Their mean-square errors are tightly lower bounded by the derived CRBs at high signal-to-noise ratios. © 1967-2012 IEEE.

关键词： Mean square error

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Metal-organic polyhedra as dynamic cross-linker for recyclable mixed matrix membranes with promising dimension stability

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Science China Chemistry 2025年第2期68卷 705-713页

作者： Linjie Lan Mingxin Zhang Haiyan Xiao Wei Liu-Fu Yuyan Lai Jiadong Chen Jia-Fu Yin Panchao Yin State Key Laboratory of Luminescent Materials and Devices&South China Advanced Institute for Soft Matter Science and Technology Guangdong Basic Research Center of Excellence for Energy and Information Polymer MaterialsSouth China University of TechnologyGuangzhou 510641China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228China

Mixed matrix membranes(MMMs)are designed by incorporating microporous inorganic fillers into polymer matrix for the integration of inorganics’excellent gas separation performance with polymers’promising ***,due to the complex interphase interaction,the prevention of long-term aging is still challenging and the poor processability/recyclability of MMMs hinders their extensive ***,a coordination assembly protocol is developed for the fabrication of MMMs with both excellent processability/recyclability upon thermal annealing and promising dimension stability even under high gas *** bearing isophthalic acid(IPA)as side chains are applied to coordinate with Cu^(2+)and the assembled 2.5 nm microporous metal-organic polyhedra(MOP),{Cu_(24)IPA_(24)},serves as multi-functional cross-linkers for the polymer network *** MOPs’well-defined microporosity grants MMMs the capability for O_(2)/N_(2) separation while their activated dynamics at high temperatures(>120℃)endows polymer networks with excellent *** contrast to conventional supramolecular units,the MOPs possess unique logarithmic ligand-exchange kinetics and they show nearly frozen bonding dynamics at room temperature,ensuring promising dimensional stability to overcome the long-term aging and high gas pressure *** work not only provides fundamental understanding of the unique relaxation dynamics of complex systems with intertwined dynamics of supramolecular bonds and polymer chains,but also paves new avenues for the fabrication of robust and recyclable MMMs and elastomers.

关键词： dynamic bonding metal-organic polyhedra mixed matrix membrane polymer recycling gas separation

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