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渤海金州湾全新统沉积物声速与土力学参数的相关性

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海岸工程 2024年第3期43卷 171-181页

作者：王方旗华清峰刘森波冯义楷自然资源部第一海洋研究所山东青岛266061 自然资源部海洋测绘重点实验室山东青岛266061

声速是海底地声学研究中的基本物理量和重要参数,研究其分布特征及其与土力学参数之间的相关性具有重要的科学意义和实用价值。基于渤海金州湾的高分辨浅地层剖面数据和钻孔取样试验数据,通过反演计算获得了全新统内微细层序的声速数据... 详细信息

声速是海底地声学研究中的基本物理量和重要参数,研究其分布特征及其与土力学参数之间的相关性具有重要的科学意义和实用价值。基于渤海金州湾的高分辨浅地层剖面数据和钻孔取样试验数据,通过反演计算获得了全新统内微细层序的声速数据及与之对应的沉积物土力学参数数据集,从而对沉积物的声速特征及其与土力学参数之间的相关性进行研究。结果表明:金州湾全新统的平均声速为1.505~1.734 km/s,平均值为1.601 km/s;粉砂、粉土、淤泥、淤泥质黏土和淤泥质粉质黏土五种沉积物类型的声速平均值分别为1.734、1.645、1.511、1.588、1.567 km/s,变化趋势大致反映了声速随粒径和含砂量的减小而减小的特征;声速与湿密度、干密度和压缩模量之间均存在较显著的线性正相关关系,与孔隙比、含水率、液限、塑性指数和压缩系数之间均存在较显著的线性负相关关系,而与塑限之间的相关性一般,与液性指数无相关性。

关键词：沉积物声速物理性质土力学参数金州湾全新统相关性

Size-dependent catalytic activity of cobalt phosphides for hydrogen evolution reaction

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Journal of Energy Chemistry 2020年第4期29卷 121-128页

作者： Xiaoke Li Luhua Jiang Jing Liu qingfeng hua Erdong Wang Guangwen Xie College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina

Transition metal phosphides are a class of promising electrocatalysts for hydrogen evolution reaction(HER) to replace noble *** this work,we for the first time synthesize carbon supported CoP nanoparticles with the average particle sizes from 3.3 to 9.2 nm,via a solvothermal process followed by low-temperature topological phosphorization,and the size-dependent HER activity of the CoP is investigated by virtue of TEM,XRD,XPS and the electrochemical *** is discovered that the 9.2nm-CoP particles possess high intrinsic HER catalytic activity as compared to the 3.3nm-CoP,although the smaller one displays a high mass activity due to the large surface *** studies manifest that the small CoP particles suffer from serious oxidation once exposing to *** contrast,most cobalt remains in the quasi-metallic state in the relatively large CoP particles,which is beneficial for the desorption of Hads,the rate determining step of the HER process over CoP *** addition,the low charge transfer resistance across the liquid/solid interfaces also contributes to the excellent HER activity of the relatively large CoP particles.

关键词： Cobalt phosphide Particle size effect Hydrogen evolution Electrocatalyst Water electrolysis

Tectonic implications of the subduction of the Kyushu-Palau Ridge beneath the Kyushu,southwest Japan

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Acta Oceanologica Sinica 2021年第3期40卷 70-83页

作者： Chenglong Xia Yanpeng Zheng Baohua Liu qingfeng hua Long Ma Xianfeng Li Qiuhong Xie College of Marine Geosciences Ocean University of ChinaQingdao 266100China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Hubei Key Laboratory of Marine Geological Resources China University of GeosciencesWuhan 430074China National Deep Sea Center Qingdao 266237China Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China

The Kyushu-Palau Ridge(KPR),a remnant arc on the Philippine Sea Plate(PSP),is subducting beneath the Kyushu,southwest *** by the subducting KPR,the Kyushu subduction zone corresponding to the KPR is significantly different from Shikoku subduction zone in terms of gravity anomalies,seismicity,the stress state,and the subducting slab *** negative free-air and Bouguer gravity anomalies are observed in a prolonged area of KPR,southeast of the Miyazaki Plain,indicating that this is where KPR overlaps the overriding *** gravity anomaly in this area is much lower than that in other areas where the inferred KPR extends,suggesting that the subduction of the buoyant KPR may cause the lower mantle density to *** earthquakes have occurred in Hyuga-nada region where the KPR subducts than in Shikoku forearc and other areas in the Kyushu forearc,indicating that the subduction of the KPR enhances the local coupling between the subducting and overriding *** centroid moment tensor(CMT)mechanism of earthquakes shows that stress is concentrated in the accumulated crust beneath the Kyushu forearc corresponding to the KPR,and the shallow thrusting events in the obducting plate are caused by the KPR *** buoyant KPR,with a large volume of low-density sediments,was responsible for the differences of the subduction depth and dip angle of the subducting Philippine Sea(PS)slab between northern Kyushu and *** seismic gaps and the sudden change of the dipping angle of the subducting PS slab indicate that slab tear may have occurred along the west side of the KPR beneath southwest Kyushu.A two-tear model was proposed,and the subduction of the buoyant KPR was believed to play an important role in the slab tear.

关键词： Kyushu-Palau Ridge gravity anomaly seismicity slab morphology slab tear

YTE-17 inhibits colonic carcinogenesis by resetting antitumor immune response via Wnt5a/JNK mediated metabolic signaling

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Journal of Pharmaceutical Analysis 2024年第4期14卷 525-541页

作者： hua Sui Wanli Deng Qiong Chai Bing Han Yuli Zhang Zhenzhen Wei Zan Li Ting Wang Jiling Feng Man Yuan qingfeng Tang Hongxi Xu Medical Experiment Center Jiading Branch of Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai201803China Translational Medicine Research Center for Cancer Prevention and Treatment Shanghai General Hospital Jiading Branch-School of Pharmacy of Shanghai University of Traditional Chinese Medicine Joint LaboratoryShanghai201803China Department of Medical Oncology Putuo HospitalShanghai University of Traditional Chinese MedicineShanghai200062China School of Pharmacy Shanghai University of Traditional Chinese MedicineShanghai201203China The Second Clinical Medical College of Henan University of Traditional Chinese Medicine Zhengzhou450000China Shanghai University of Traditional Chinese Medicine Shanghai201203China Precision Research Center for Refractory Diseases Institute for Clinical ResearchShanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai201620China

The density and composition of lymphocytes infiltrating colon tumors serve as predictive factors for the clinical outcome of colon *** previous studies highlighted the potent anti-cancer properties of the principal compounds found in Garcinia yunnanensis(YTE-17),attributing these effects to the regu-lation of multiple signaling ***,knowledge regarding the mechanism and effect of YTE-17 in the prevention of colorectal cancer is *** this study,we conducted isobaric tags for relative and absolute quantification(iTRAQ)analysis on intestinal epithelial cells(IECs)exposed YTE-17,both in vitro and in vivo,revealing a significant inhibition of the Wnt family member 5a(Wnt5a)/c-Jun N-terminal kinase(JNK)signaling ***,we elucidated the influence and mechanism of YTE-17 on the tumor microenvironment(TME),specifically focusing on macrophage-mediated T helper 17(Th17)cell induction in a colitis-associated cancer(CAC)model with Wnt5a ***,we performed the single-cell RNA sequencing(scRNA-seq)on the colonic tissue from the Wnt5a-deleted CAC model to characterize the composition,lineage,and functional status of immune mesenchymal cells during different stages of colorectal cancer(CRC)***,our findings demon-strate a significant reduction in M2 macrophage polarization and Th17 cell phenotype upon treatment with YTE-17,leading to the restoration of regulatory T(Treg)/Th17 cell balance in azoxymethane(AOM)/dextran sodium sulfate(DSS)***,we also confirmed that YTE-17 effectively inhibited the glycolysis of Th17 cells in both direct and indirect co-culture systems with M2 ***,our study shed light on potential mechanisms linking the non-canonical Wnt5a/JNK signaling pathway and well-established canonical b-catenin oncogenic pathway in ***,we proposed that Wnt5a/JNK signaling activity in IECs promotes the development of cancer stem cells with b-catenin activity within

关键词： Tumor microenvironment Intestinal epithelial cells Treg/Th17 cells Metabolism Wnt5a/JNK signaling Tumorigenesis

Relationships between the sound speed ratio and physical properties of surface sediments in the South Yellow Sea

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Acta Oceanologica Sinica 2021年第4期40卷 65-73页

作者： Guanbao Li Jingqiang Wang Xiangmei Meng Baohua Liu Guangming Kan Guozhong Han qingfeng hua Yanliang Pei Lei Sun Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China National Deep Sea Center Ministry of Natural ResourcesQingdao 266237China

Building empirical equations is an effective way to link the acoustic and physical properties of *** equations play an important role in the prediction of sediments sound speeds required in underwater *** many empirical equations coupling acoustic and physical properties have been developed over the past few decades,further confirmation of their applicability by obtaining large amounts of data,especially for equations based on in situ acoustic measurement techniques,is required.A sediment acoustic survey in the South Yellow Sea from 2009 to 2010 revealed statistical relationships between the in situ sound speed and sediment physical *** improve the comparability of these relationships with existing empirical equations,the present study calculated the ratio of the in situ sediment sound speed to the bottom seawater sound speed,and established the relationships between the sound speed ratio and the mean grain size,density and porosity of the *** sound speed of seawater at in situ measurement stations was calculated using a perennially averaged seawater sound speed map by an interpolation ***,empirical relations between the index of impedance and the sound speed and the physical properties were *** results confirmed that the existing empirical equations between the in situ sound speed ratio and the density and porosity have general suitability for *** study also considered that a multiple-parameter equation coupling the sound speed ratio to both the porosity and the mean grain size may be more useful for predicting the sound speed than an equation coupling the sound speed ratio to the mean grain size.

关键词： sound speed ratio index of impedance physical properties surface sediment in situ measurement South Yellow Sea

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基于优化参数Adam算法的全波形反演

地球物理学报 2023年第11期66卷 4654-4663页

作者：王倩倩宋鹏华清峰刘保华李官保王绍文都国宁中国海洋大学海洋地球科学学院青岛266100 崂山实验室海洋矿产资源评价与探测技术功能实验室青岛266100 中国海洋大学海底科学与探测技术教育部重点实验室青岛266100 自然资源部第一海洋研究所青岛266061

常规的全波形反演(FWI)计算得到的梯度往往不做优化处理,并且每次计算模型更新量时还需要额外的波场延拓计算来获取迭代步长,导致收敛效率和反演精度降低.本文将深度学习中的Adam算法引入到全波形反演中来,其可在仅付出极小计算代价的... 详细信息

常规的全波形反演(FWI)计算得到的梯度往往不做优化处理,并且每次计算模型更新量时还需要额外的波场延拓计算来获取迭代步长,导致收敛效率和反演精度降低.本文将深度学习中的Adam算法引入到全波形反演中来,其可在仅付出极小计算代价的前提下实现梯度的优化处理,由梯度直接计算出模型更新量,避免了迭代步长的计算,且能显著提升收敛效率和反演精度;同时针对Adam算法的默认参数优化和选取问题,通过数值实验系统分析了不同参数的全波形反演效果,并给出了更适合于全波形反演的优化参数.实验结果表明,相比于默认参数的Adam算法以及L-BFGS算法的全波形反演,基于优化参数的Adam算法其收敛速度和反演精度更高.

关键词：全波形反演梯度优化 Adam 参数优化

强流脉冲电子束辐照对低压等离子喷涂 MCrAlY涂层组织与性能的影响

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金属学报 2024年第4期60卷 495-508页

作者：蔡杰高杰花银群叶云霞关庆丰张小锋江苏大学先进制造与现代装备技术工程研究院镇江212013 江苏大学机械工程学院镇江212013 江苏大学材料科学与工程学院镇江212013 广东省科学院新材料研究所广州510650

为提高热障涂层黏结层高温抗氧化性能,本工作利用强流脉冲电子束(HCPEB)技术对低压等离子喷涂(LPPS)制备的NiCrAlY黏结层表面进行辐照改性处理,并揭示辐照改性效应对涂层抗氧化行为的影响。对比研究了HCPEB改性前后NiCrAlY涂层微观组织... 详细信息

为提高热障涂层黏结层高温抗氧化性能,本工作利用强流脉冲电子束(HCPEB)技术对低压等离子喷涂(LPPS)制备的NiCrAlY黏结层表面进行辐照改性处理,并揭示辐照改性效应对涂层抗氧化行为的影响。对比研究了HCPEB改性前后NiCrAlY涂层微观组织演变行为、1150℃静态氧化性能以及热生长氧化物(TGO)残余应力分布。微观分析结果表明,LPPS喷涂态涂层表面粗糙、存在较多未熔大颗粒;HCPEB改性态涂层表面平整光滑,形成厚约12μm的致密重熔层,其内部形成丰富的变形结构以及Y-Al富集纳米分散颗粒。1150℃静态氧化实验及TGO残余应力测试结果表明,喷涂态涂层氧化150 h后氧化膜出现脱落、内氧化严重,应力陡然下降。相比之下,HCPEB改性态涂层在整个氧化周期内表面氧化膜均能稳态生长,未出现剥落迹象,其TGO应力以稳定且缓慢的趋势增加。结果表明,HCPEB辐照改性技术可以有效提高MCrAlY涂层的抗高温氧化性能。

关键词：低压等离子喷涂(LPPS) 强流脉冲电子束(HCPEB) NiCrAlY涂层微观组织抗高温氧化性能

12CrMoV合金钢表面激光熔覆WC/Ni基涂层组织演变及性能研究

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激光与光电子学进展 2024年第9期61卷 342-349页

作者：韩基泰夏庆锋王可庆花国祥无锡学院自动化学院江苏无锡214105

为解决冷作模具钢在长期服役过程中易发生磨损失效及腐蚀失效的问题,利用激光熔覆技术在12CrMoV基板上制备了不同WC含量的Ni60涂层。利用X射线衍射仪、扫描电子显微镜、X射线能谱仪、摩擦磨损试验机及电化学工作站对涂层的成形特征、显... 详细信息

为解决冷作模具钢在长期服役过程中易发生磨损失效及腐蚀失效的问题,利用激光熔覆技术在12CrMoV基板上制备了不同WC含量的Ni60涂层。利用X射线衍射仪、扫描电子显微镜、X射线能谱仪、摩擦磨损试验机及电化学工作站对涂层的成形特征、显微组织、力学性能及耐腐蚀性能进行了表征。结果表明:WC的添加量改变了熔池的凝固特性,从而降低了涂层的宽度,提高了涂层的深度;当WC的添加量为30%(质量分数)时,涂层的硬度为853 HV0.3,平均摩擦因数仅为0.467,具有优异的力学性能,但韧性降低,导致凝固过程中形成孔隙,降低了涂层的耐腐蚀性能;当WC的添加量为10%和20%时,晶粒组织的尺寸得到了细化,晶界面积减小,具有优异的耐腐蚀性能;当WC添加量为20%时,涂层的腐蚀电流密度仅为3.65×10-5A/cm^(2),并且力学性能略低于WC添加量30%得到的涂层。因此,探究了适用于磨损环境及腐蚀环境的WC/Ni60涂层,确定了WC的最佳添加量,拓展了WC/Ni60涂层在模具钢的应用范围,对工程实践具有指导意义。

关键词：模具钢激光熔覆 WC/Ni60涂层显微组织性能表征

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南海上地幔各向异性结构及动力学含义

地震学报 2023年第3期45卷 494-520页

作者：薛梅李琳杨挺刘晨光华清峰夏少红黄海波黎伯孟霍达潘谟晗同济大学海洋地质国家重点实验室上海200092 南方科技大学海洋科学与工程系广东深圳518055 自然资源部第一海洋研究所海洋地质与成矿作用自然资源部重点实验室山东青岛266061 中国科学院南海海洋研究所广州510301 上海佘山地球物理国家野外科学观测研究站上海200062 越南科学技术研究院地球物理研究所越南河内10072 多伦多大学土木与矿物工程系加拿大多伦多M5S1A4

南海处于欧亚板块、太平洋板块和印度—澳大利亚板块的交会区,是西北太平洋一系列边缘海中最大的边缘海。关于南海的打开以往研究提出了如印度板块与欧亚板块碰撞驱动挤出以及古南海俯冲拖拽等诸多模型。本文力图通过南海海盆及周边各... 详细信息

南海处于欧亚板块、太平洋板块和印度—澳大利亚板块的交会区,是西北太平洋一系列边缘海中最大的边缘海。关于南海的打开以往研究提出了如印度板块与欧亚板块碰撞驱动挤出以及古南海俯冲拖拽等诸多模型。本文力图通过南海海盆及周边各向异性结构来约束南海演化机制。基于同济大学2012和2014年在南海中央海盆进行的两次被动源宽频带海底地震观测试验回收的10台OBS记录仪近1年的地震数据,本文采用三种不同的横波分裂方法,获取了中央海盆针对两次远震的XKS分裂结果以及南海周边20次区域地震提供的S震相分裂结果。SKS分裂结果显示,南海中央海盆下方存在快轴方向为NE-SW向的各向异性,其成因可能与海底扩张时期沿洋脊方向的地幔流以及南海海洋板块俯冲拖拽的地幔流有关。南海及其周边上地幔存在强各向异性,且不同方位观测到的各向异性不同,快轴方向与前人SKS横波分裂结果、GPS和板块运动一致,较好地对应了区域构造运动或者地幔对流模型。各向异性结果与印度—欧亚板块碰撞驱动挤出模型以及古南海俯冲板块拖拽模型预期结果一致,与理想的地幔柱上涌驱动模型不一致。由于海盆各向异性观测特别有限,各向异性结果不能证实亦不能证伪“大西洋型”海底扩张模型、弧后扩张模型和板缘破裂模型,后续还需要更多的观测结果来证实或证伪上述模型。

关键词：南海打开模型横波分裂 SKS震相区域S震相