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Characteristics of vertical distributions of methane and dimethylsulphoniopropionate in the southern Yap Trench

Journal of Oceanology and Limnology 2023年第6期41卷 2101-2116页

作者： Yuhuan HUANG Chengjun SUN Lina Lü neal xiangyu ding Liangmin YU Guipeng YANG Haibing ding Frontier Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and TechnologyMinistry of EducationOcean University of ChinaQingdao 266100China Marine Ecology and Environmental Science Laboratory Laoshan Laboratory(Qingdao)Qingdao 266237China Marine Bioresource and Environment Research Center the First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China College of Agriculture and Life Sciences Cornell UniversityIthacaNY 14853USA

Methane(CH_(4) )and dimethylsulphoniopropionate(DMSP)are major carbon and sulfur sources for bacterioplankton in the *** investigated the characteristics of CH_(4) and DMSP in the southern Yap Trench from sea surface to hadal zone in June *** found that concentrations of CH_(4) varied from 1.5 to 4.5 nmol/L with saturation between 94% and 204% in the euphotic *** of dissolved DMSP(DMSPd)ranged from 0.5 to 3.7 nmol/L with higher values in surface water and decreased with *** of particulate DMSP(DMSPp)varied from 0 to 13.6 nmol/*** of total DMSP(DMSPt)ranged 2.0-15.2 nmol/*** concentrations decreased slightly and reached consistent levels in 200-3000-m depth due probably to heterotrophic bacterial production in marine aphotic and high-pressure *** exception occurred around 4000-m depth where their concentrations increased considerably and then decreased in deeper *** previously unrecognized phenomenon sheds light on the elevated concentrations of DMSP in the abyssal layer that might be affected by the Lower Circumpolar Deep Water(LCPW).Concentrations of CH_(4) in seawater of the Benthic Boundary Layer of the southern Yap Trench were slightly higher than those in the water column at approximate depth,and concentrations of DMSP in seawater of the Benthic Boundary Layer of the southern Yap Trench were not much higher than those in the water column at the approximate depth,indicating that sediment was a weak source of CH_(4) but was not a source of DMSP for seawater in the study *** study presented clear correlations between CH_(4) and DMSP from sea surface to sea bottom,proving that DMSP might be a potential substrate for CH_(4) not only in oxic surface seawater but also in deep water.

关键词： methane dimethylsulphoniopropionate(DMSP) hadal zone Jiaolong submersible Yap Trench oceanic methane paradox

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Distributed Fault Estimation for Nonlinear Systems With Sensor Saturation and Deception Attacks Using Stochastic Communication Protocols

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IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1865-1876页

作者： Weiwei Sun Xinci Gao Lusong ding xiangyu Chen Institute of Automation Qufu Normal UniversityQufu 273165China

This paper is aimed at the distributed fault estimation issue associated with the potential loss of actuator efficiency for a type of discrete-time nonlinear systems with sensor *** the distributed estimation structure under consideration,an estimation center is not necessary,and the estimator derives its information from itself and neighboring nodes,which fuses the state vector and the measurement *** an effort to cut down data conflicts in communication networks,the stochastic communication protocol(SCP)is employed so that the output signals from sensors can be ***,a recursive security estimator scheme is created since attackers randomly inject malicious signals into the selected *** this basis,sufficient conditions for a fault estimator with less conservatism are presented which ensure an upper bound of the estimation error covariance and the mean-square exponential boundedness of the estimating ***,a numerical example is used to show the reliability and effectiveness of the considered distributed estimation algorithm.

关键词： Actuator fault deception attacks distributed estimation sensor saturation stochastic communication protocol(SCP).

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Mechanical response of a tunnel subjected to strike-slip faulting processes,based on a multi-scale modeling method

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Frontiers of Structural and Civil Engineering 2024年第8期18卷 1281-1295页

作者： Guoguo LIU Ping GENG Tianqiang WANG xiangyu GUO Jiaxiang WANG Ti ding Key Laboratory of Transportation Tunnel Engineering Ministry of EducationChengdu 610031China College of Civil Engineering Huaqiao UniversityXiamen 361021China China Railway Design Corporation Tianjin 300308China

The stick-slip action of strike-slip faults poses a significant threat to the safety and stability of underground *** this study,the north-east area of the Longmenshan fault,Sichuan,provides the geological background;the rheological characteristics of the crustal lithosphere and the nonlinear interactions between plates are described by Burger’s viscoelastic constitutive model and the friction constitutive model,respectively.A large-scale global numerical model for plate squeezing analysis is established,and the seemingly periodic stick-slip action of faults at different crust depths is *** a second model at a smaller scale,a local finite element model(sub-model),the time history of displacement at a ground level location on the Longmenshan fault plane in a stick-slip action is considered as the displacement *** integration of these models,creating a multi-scale modeling method,is used to evaluate the crack propagation and mechanical response of a tunnel subjected to strike-slip *** determinations of the recurrence interval of stick-slip action and the cracking characteristics of the tunnel are in substantial agreement with the previous field investigation and experimental results,validating the multi-scale modeling *** can be concluded that,regardless of stratum stiffness,initial cracks first occur at the inverted arch of the tunnel in the footwall,on the squeezed side under strike-slip *** smaller the stratum stiffness is,the smaller the included angle between the crack expansion and longitudinal direction of the tunnel,and the more extensive the crack expansion *** the tunnel in a high stiffness stratum,both shear and bending failures occur on the lining under strike-slip faulting,while for that in the low stiffness stratum,only bending failure occurs on the lining.

关键词： stick-slip action plate squeezing analysis multi-scale modeling method lining cracking mechanical response

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Structural evolution and zero-field SMM behaviour in ferromagnetically-coupled disk-type Co_(7)clusters bearing exclusively end-on azido bridges

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Chinese Chemical Letters 2024年第8期35卷 567-571页

作者： Yijia Jiao Yuzhu Li Yuting Zhou Peipei Cen Yi ding Yan Guo xiangyu Liu State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China College of Public Health College of Basic Medical ScienceNingxia Medical UniversityYinchuan 750021China

Concise chemistry leads to a family of heptanuclear Co^(Ⅱ)-clusters,[Co_(7)(N_(3))_(12)(CH_(3)CN)_(12)][Y_(2)(NO_(3))_(4)(piv)_(4)]·2CH_(3)CN(DC1)(pivH=pivalic acid),[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(0.4)(Cl)_(1.6)]·4CH_(3)CN(DC2)and[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(2)]·4CH_(3)CN(DC3),in which the metal ions are exclusively bridged by end-on azido ligands to stabilize a beautiful disk-like *** resulting clusters exhibit interesting structural transformations and thermodynamically-distinct steady states verified by theoretical *** studies reveal the first observation of zero-field SMM behaviour in disk-like heptanuclear Co^(Ⅱ)complexes.

关键词： Multinuclear Co^(Ⅱ)-clusters Disk-like motif Structural modulation Ferromagnetic coupling Zero-field SMM

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The application of the strip-shaped cymba conchae orthosis in the nonsurgical correction of complex auricular deformity

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Journal of Otology 2024年第1期19卷 24-29页

作者： Huijuan Xu Shaoguang ding Fei Zhang Zhifeng Zhang xiangyu Chen Mingyang Li Haitao Yang Fugen Han Hongjian Liu Department of Otolaryngology Head and Neck Surgery People’s Hospital of Henan UniversityHenan Provincial People’s HospitalZhengzhouChina Department of Otolaryngology Head and Neck Surgery Henan Provincial People’s HospitalPeople’s Hospital of Zhengzhou UniversityPeople’s Hospital of Henan UniversityZhengzhouChina Department of Otolaryngology Head and Neck Surgery Henan Children’s HospitalZhengzhouChina Department of Otolaryngology Head and Neck Surgery The Third People’s Hospital of ZhengzhouZhengzhouChina Zheng Dong Mihuan Clinic ZhengzhouChina

Objective: This study aims to evaluate the efficacy and safety of using a strip-shaped cymba conchae orthosis for the nonsurgical correction of complex auricular deformities. Methods: Clinical data were collected from 2020 to 2021 for 6 patients who underwent correction using a stripshaped cymba conchae orthosis. The indications, corrective effects, and complications associated with use of the orthosis were analyzed. Results: There were four indications for treatment: cryptotia with helix adhesion;cryptotia with grade I microtia;cryptotia with excessive helix thickness;and auricular deformity beyond the treatment time window(≥6 months). Excellent corrective effects were observed in all 6 patients. Complications occurred in one patient, who recovered after symptomatic treatment. Conclusion: The use of a strip-shaped cymba conchae orthosis alone or combined with a U-shaped helix orthosis presents a feasible approach for correcting complex auricular deformities or deformities beyond the treatment time window in pediatric patients.

关键词： Cymba conchae Auricular deformity Cryptotia Nonsurgical correction Orthosis

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Microglial glutaminase 1 mediates chronic restraint stress-induced depression-like behaviors and synaptic damages

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Signal Transduction and Targeted Therapy 2024年第1期9卷 40-43页

作者： Huili Chen Shengyang Fu xiangyu Li Meng Shi Jiazhen Qian Shu Zhao Ping Yuan Lu ding Xiaohuan Xia Jialin C.Zheng Center for Translational Neurodegeneration and Regenerative Therapy Tongji Hospital affiliated to Tongji University School of Medicine200065 ShanghaiChina Department of Cardio-Pulmonary Circulation Shanghai Pulmonary HospitalSchool of MedicineTongji UniversityShanghaiChina Translational Research Institute of Brain and Brain-Like Intelligence Shanghai Fourth People’s Hospital affiliated to Tongji University School of Medicine200434 ShanghaiChina

Dear Editor,Major depressive disorder(MDD)is one of the most common psychiatric illnesses that significantly increase the risk of suicide.1 Stress-triggered dysfunctions of microglia have been identified as a commonly occurred pathological feature of MDD.1–3 Microglial dysfunction contributes to the pathogenesis of MDD via immunoresponses/neuroinflammation-mediated neural damage and pathological synapse loss-mediated neural circuit disruption.1 Although the involvement of microglia in MDD has been widely investigated,the molecular mechanisms underlying microglial dysfunction remain largely ***,we identified glutaminase 1(Gls1)as one key protein that participates in microglial dysfunction.4–6 Gls1 catalyzes the hydrolysis of glutamine to produce glutamate in the brain.4 Besides its well-known role in excitatory neurotoxicity,we found Gls1 up-regulation in microglia in animal models of Alzheimer’s disease and ischemic stroke.4,7 Gls1 activates microglia to overproduce cytokines and release inflammatory extracellular vesicles,therefore leading to neuroinflammation in animal models of Alzheimer’s disease and ischemic stroke.4–6 More importantly,Gls1 has been found to be up-regulated in the brains of MDD patients,and microglial Gls1 deficiency mitigated LPS-induced depression-like behaviors.8 However,LPS exposure is not an appropriate model to mimic MDD phenotypes,leaving the involvement of Gls1 in MDD an undetermined question.

关键词： involvement inflammation media

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基于混合稀疏ICCP的联合抗差重力匹配定位方法

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中国惯性技术学报 2024年第2期32卷 153-162页

作者：丁继成杜翔宇杨崇昭赵岩哈尔滨工程大学智能科学与工程学院哈尔滨150001

针对经典最近等值线迭代(ICCP)算法因重力异常测量误差导致匹配精度下降甚至失效的问题,提出联合抗差匹配算法以提高匹配精度及可靠性。首先,分析了匹配点集间的匹配残差在高斯噪声影响下呈非高斯分布,为抑制其影响,采用l_(p)范数代替l_... 详细信息

针对经典最近等值线迭代(ICCP)算法因重力异常测量误差导致匹配精度下降甚至失效的问题,提出联合抗差匹配算法以提高匹配精度及可靠性。首先,分析了匹配点集间的匹配残差在高斯噪声影响下呈非高斯分布,为抑制其影响,采用l_(p)范数代替l_(2)范数计算匹配残差,并利用匹配残差重调野值点以获得有效的匹配区域。在此基础上,提出混合稀疏ICCP算法,并利用其进行粗匹配,然后将粗匹配后的位置作为惯导系统(INS)指示位置,再使用经典ICCP算法进行精匹配,获得更高的定位精度。仿真结果表明,考虑重力异常测量误差的情况下,重力联合抗差匹配算法的误差最大值小于1 n mile,导航精度较传统ICCP算法提升60%以上,提升了算法的鲁棒性和匹配精度。

关键词：重力匹配混合稀疏最近等值线迭代算法抗差算法联合匹配

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互利作用促进了高山树线幼苗的存活

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Journal of Plant Ecology 2024年第3期17卷 115-127页

作者： Wensheng Chen Jiangrong Li Jesús Julio Camarero Huihui ding Fangwei Fu Yueyao Li xiangyu Zheng Xiaoxia Li Wei Shen Shalik Ram Sigdel Steven W.Leavitt Eryuan Liang Institute of Tibet Plateau Ecology Tibet Agricultural&Animal Husbandry UniversityNyingchi 860000China Key Laboratory of Forest Ecology in Tibet Plateau(Tibet Agricultural&Animal Husbandry University) Ministry of EducationNyingchi 860000China National Forest Ecosystem Observation&Research Station of Nyingchi Tibet Nyingchi 860000China Key Laboratory of Alpine Vegetation Ecological Security in Tibet Nyingchi 860000China Zhejiang Zhoushan Archipelago Observation and Research Station Zhejiang Tiantong Forest Ecosystem National Observation and Research Stationand Shanghai Key Lab for Urban Ecological Processes and Eco-RestorationSchool of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China State Key Laboratory of Tibetan Plateau Earth System Resources and Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Instituto Pirenaico de Ecología(IPE-CSIC) Zaragoza 50059Spain Anhui Province Key Lab of Farmland Ecological Conservation and Pollution Prevention Key Laboratory of JiangHuai Arable Land Resources Protection and Eco-restorationMinistry of Natural ResourcesCollege of Resources and EnvironmentAnhui Agricultural UniversityHefei 230036China Laboratory of Tree-Ring Research University of ArizonaTucsonAZ 85721USA

高山树线被视为记录气候变化对树木和森林影响的生态监测器。迄今为止,大多数树线研究都集中在气候变化如何驱动树线动态的变化。然而,关于生物相互作用如何调节树线变化,特别是在树木更新这一树线动态的瓶颈方面,人们知之甚少。本研究... 详细信息

高山树线被视为记录气候变化对树木和森林影响的生态监测器。迄今为止,大多数树线研究都集中在气候变化如何驱动树线动态的变化。然而,关于生物相互作用如何调节树线变化,特别是在树木更新这一树线动态的瓶颈方面,人们知之甚少。本研究假设种间和种内促进作用决定了高山树线树苗的定居和存活。为了验证这一假设,我们在青藏高原东南部的色季拉山高山树线交错区(海拔4300–4500 m)的3个生长生境(林冠内、林冠外和草地)中共计移植了630株不同年龄(4–6年、7–9年和10–15年)的急尖长苞冷杉(Abies georgei ***)幼苗,连续3年监测了移植后幼苗的微气候、高度生长、死亡率和叶片功能性状。结果发现,叶片功能性状的变化是由微气候驱动的。移植后,叶片可溶性糖和淀粉浓度以及C:P比增加,而叶面积减小。幼苗的资源利用逐渐转向更保守的策略,其背后机制主要受到了生理性状(非结构性碳水化合物和植物养分)的介导。同时,由结构方程模型发现太阳辐射、温度和水分条件在植物相互作用下,通过介导叶片形态性状的变化最终影响了幼苗的死亡率和年生长。上述研究结果表明,植物间的互利作用通过改变太阳辐射和叶片功能性状,最终在决定幼苗生长和存活上起到至关重要的作用,同时也为理解全球气候变化背景下高山树线动态变化的驱动机制提供了新的见解。

关键词：青藏高原移栽实验叶片功能性状太阳辐射

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宋代织物画缋工艺研究

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纺织报告 2024年第7期43卷 134-136页

作者：丁相宇温州大学浙江温州325035

画缋工艺是一种中国传统染色技术。文章基于发掘资料的整理和出土实物的研究,详细分析了宋代画缋工艺和艺术特点,通过对文物的艺术分析和比较研究,揭示了宋代画缋工艺的发展历程及其与其他印染工艺的关系。研究发现,宋代织物画缋工艺繁... 详细信息

画缋工艺是一种中国传统染色技术。文章基于发掘资料的整理和出土实物的研究,详细分析了宋代画缋工艺和艺术特点,通过对文物的艺术分析和比较研究,揭示了宋代画缋工艺的发展历程及其与其他印染工艺的关系。研究发现,宋代织物画缋工艺繁荣发展,并在继承传统的基础上形成了以印金敷彩为主的工艺特征。这对了解宋代社会文化背景、探索中国传统画缋工艺在宋代的发展与演变具有重要意义。

关键词：宋代黄昇墓出土文物画缋工艺制作工艺

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基于星地传感技术的土壤盐渍化监测进展与展望

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遥感学报 2024年第9期28卷 2187-2208页

作者：王敬哲丁建丽葛翔宇彭杰胡忠文深圳职业技术大学人工智能学院深圳518055 中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室北京100101 新疆大学地理与遥感科学学院乌鲁木齐830017 新疆大学新疆绿洲生态自治区重点实验室乌鲁木齐830017 塔里木大学农学院阿拉尔843300 深圳大学自然资源部大湾区地理环境监测重点实验室深圳518060

土壤盐渍化是全球面临的土壤退化和环境恶化的共性问题。近地传感、卫星遥感与机载遥感等星地传感技术的蓬勃发展使得高效且准确的土壤盐分周期监测成为可能,并为土壤盐渍化研究提供了坚实技术支撑。本文针对土壤盐渍化星地传感监测的... 详细信息

土壤盐渍化是全球面临的土壤退化和环境恶化的共性问题。近地传感、卫星遥感与机载遥感等星地传感技术的蓬勃发展使得高效且准确的土壤盐分周期监测成为可能,并为土壤盐渍化研究提供了坚实技术支撑。本文针对土壤盐渍化星地传感监测的发展进程,以“数据—方法—应用”为脉络,详细分析梳理了土壤盐渍化监测的原理、主要数据源及主流方法;随后归纳总结当前技术体系的发展现状和监测数据、监测方法及尺度效应等局限性;最后针对基于星地传感技术的土壤盐渍化监测研究的进一步发展提出了展望和设想,明确了多源星地数据融合的次生土壤盐渍化监测;依托多平台开展土壤盐渍化的多尺度协同监测;借助学科交叉加深土壤盐渍化的探测深度;以及基于云计算的土壤盐渍化共享数据集与平台开发等未来需要重点关注的研究方向。

关键词：土壤盐渍化遥感近地传感时空变化数字土壤制图

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