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Geometry and 3D seismic characterisation of post-rift normal faults in the Pearl River Mouth Basin,northern South China Sea

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Acta Oceanologica Sinica 2024年第4期43卷 25-39页

作者： Yuanhang Liu Jinwei Gao wanli chen Jiliang Wang Umair Khan Laboratory of Marine Geophysics and Georesources Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanya 572000China University of Chinese Academy of Sciences Beijing 100049China

Based on high-resolution 3D seismic data acquired in the Pearl(Zhujiang)River Mouth Basin of the northern South China Sea,this study investigated the geometry,spatial extension,and throw distribution of the post-rift normal fault through detailed seismic interpretation and fault modeling.A total of 289 post-rift normal faults were identified in the study area and can be classified into four types:(1)isolated normal faults above the carbonate platform;(2)isolated normal faults cutting through the carbonate platform;(3)conjugate normal faults,and(4)connecting normal faults.Throw distribution analysis on the fault planes show that the vertical throw profiles of most normal fault exhibit flat-topped profiles.Isolated normal faults above the carbonate platform exhibit roughly concentric ellipses with maximum throw zones in the central section whereas the normal faults cutting through the carbonate platform miss the lowermost section due to the chaotic seismic reflections in the interior of the carbonate platform.The vertical throws of conjugate normal faults anomalously decrease toward their intersection region on the fault plane whereas the connecting normal faults present two maximum throw zones in the central section of the fault plane.According to the symmetric elliptical distribution model of fault throw,an estimation was made indicating that normal faults cutting through the carbonate platform extended downward between-1308 s and-1780 s(two-way travel time)in depth and may not penetrate the entire Liuhua carbonate platform.Moreover,it is observed that the distribution of karst caves on the top of the carbonate platform disaccord with those of hydrocarbon reservoirs and the post-rift normal faults cutting through the carbonate platform in the study area.We propose that these karst caves formed most probably by corrosive fluids derived from magmatic activities during the Dongsha event,rather than pore waters or hydrocarbons.

关键词： Post-rift normal faults fault throw Karst caves Corrosive fluids Pearl River Mouth Basin South China Sea

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Enhancing alkaline water oxidation with NiFe alloy-encapsulated nitrogen-doped vertical graphene array

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Nano Research 2024年第6期17卷 4790-4796页

作者： Jue Nan Beirong Ye Xun He chen Li wanli Zhang Qian Liu Luming Li Wei Chu Xuping Sun Yongqi Zhang School of Integrated Circuit Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 611731China Institute for Advanced Study Chengdu UniversityChengdu 610106China College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China

Advancing efficient and affordable electrocatalysts to boost the oxygen evolution reaction(OER)is pivotal for sustainable green hydrogen production.Herein,we propose the fabrication of nickel-iron alloy nanoparticles-encapsulated on N-doped vertically aligned graphene array on carbon cloth(NiFe@NVG/CC)as a highly active three-dimensional(3D)catalyst electrode for OER.In 1 M KOH,such NiFe@NVG/CC demonstrates outstanding catalytic performance,necessitating merely overpotential of 245 mV for achieving a current density of 10 mA·cm^(−2),a remarkably low Tafel slope of 36.2 mV·dec^(−1).Furthermore,density functional theory calculations validate that the incorporate of N species into graphene can reinforce the electrocatalytic activity though reducing the reaction energy barrier during the conversion of*O to*OOH intermediates.The outstanding performance and structural benefits of NiFe@NVG/CC offer valuable insights for the development of innovative and efficient electrocatalysts for water oxidation.

关键词： NiFe alloy N-doped vertical graphene array electrocatalyst oxygen evolution reaction density functional theory

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Pharmacological manipulation of macrophage autophagy effectively rejuvenates the regenerative potential of biodegrading vascular graft in aging body

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Bioactive Materials 2022年第5期7卷 283-299页

作者： wanli chen Weiwei Xiao Xuzheng Liu Pingping Yuan Siqian Zhang Yinggang Wang Wei Wu State Key Laboratory of Military Stomatology&National Clinical Research Center for Oral Diseases&Shaanxi Key Laboratory of Stomatology Department of Oral&Maxillofacial SurgerySchool of StomatologyThe Fourth Military Medical UniversityXi’anShaanxiChina School&Hospital of Stomatology Tongji UniversityShanghai Engineering Research Center of Tooth Restoration and Regeneration399 Middle Yanchang RoadShanghai 200072China

Declined regenerative potential and aggravated inflammation upon aging create an inappropriate environment for arterial regeneration.Macrophages are one of vital effector cells in the immune microenvironment,especially during biomaterials mediated repairing process.Here,we revealed that the macrophage autophagy decreased with aging,which led to aggravated inflammation,thereby causing poor vascular remodeling of artificial grafts in aging body.Through loading the autophagy-targeted drugs,rapamycin and 3-MA(3-methyladenine),in PCL(polycaprolactone)sheath of the PGS(poly glycerol sebacate)-PCL vascular graft,the essential role of macrophage autophagy was confirmed in regulating macrophage polarization and biomaterial degradation.Moreover,the utilization of rapamycin promoted anti-inflammatory polarization of macrophage by activating autophagy,which further promoted myogenic differentiation of vascular progenitor cells and accelerated endothelialization.Our study elucidated the contribution of pharmacological manipulation of macrophage autophagy in promoting regeneration of small caliber artery,which may pave a new avenue for clinical translation of vascular grafts in aging body.

关键词： Autophagy Macrophages Inflammation Aging Fast-degradation materials

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Promoting interactions between cognitive science and large language models

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The Innovation 2024年第2期5卷 9-10页

作者： Youzhi Qu Penghui Du Wenxin Che chen Wei Chi Zhang wanli Ouyang Yatao Bian Feiyang Xu Bin Hu Kai Du Haiyan Wu Jia Liu Quanying Liu Department of Biomedical Engineering Southern University of Science and TechnologyShenzhen 518055China Shanghai AI Laboratory Shanghai 200232China Tencent AI Lab Shenzhen 518057China iFLYTEK AI Research Hefei 230088China School of Medical Technology Beijing Institute of TechnologyBeijing 100081China Institute for Artificial Intelligence Peking UniversityBeijing 100871China Centre for Cognitive and Brain Sciences and Department of Psychology University of MacaoMacao 999078China Department of Psychology Tsinghua UniversityBeijing 100084China

Large language models(LLMs)have made unprecedented progress,demonstrating human-like language proficiency and an extraordinary ability to encode complex knowledge.The emergence of high-level cognitive capabilities in LLMs,such as in-context learning and complex reasoning,suggests a path toward the realization of artificial general intelligence(AGI).However,we lack scientific theories and tools to assess and interpret such an emergence of the advanced intelligence of LLMs.Artificial intelligence(AI)has been extensively applied in various areas of fundamental science to accelerate scientific research.

关键词： cognitive such language

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基于毫米波通信技术的超高清视频传输方法研究

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激光杂志 2024年第5期45卷 170-175页

作者：陈万里黄河科技学院郑州450063

为了提高对超高清视频传输能力,提出基于毫米波通信的超高清视频传输方法。采用多频调制通信组网技术构建超高清视频传输的信道模型,建立超高清视频毫米波通信传输的自适应图像信息交互和采集模型;结合Lyapunov指数谱密度特征分析,实现... 详细信息

为了提高对超高清视频传输能力,提出基于毫米波通信的超高清视频传输方法。采用多频调制通信组网技术构建超高清视频传输的信道模型,建立超高清视频毫米波通信传输的自适应图像信息交互和采集模型;结合Lyapunov指数谱密度特征分析,实现谱特征分解和信道均衡模型构建;建立视频传输的视景转换和高阶谱特征提取模型;采用毫米波通信技术,实现滤波补偿和反馈增益调节;采用联合自相关的统计特征分析方法,得到动态均衡迭代函数,通过复杂信道环境下的抗干扰抑制和均衡调度,实现对超高清视频的无损传输和编码解码。实验结果表明,该方法进行超高清视频传输的误码率较低,平均为0.058 2,传输时延较低,平均为248.4 ms,峰值信噪比为49 dB。

关键词：毫米波通信技术超高清视频传输谱特征分解 Lyapunov指数谱

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煅烧沸石粉对硫氧镁水泥耐水性的影响

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建筑材料学报 2024年第3期27卷 197-205页

作者：周俊峰陈啸洋陈兵毕万利关岩辽宁科技大学材料与冶金学院辽宁鞍山114051 辽宁科技大学化学工程与技术学院辽宁鞍山114051 上海交通大学船舶海洋与建筑工程学院上海200240 辽宁科技大学科大峰驰镁建材研究院辽宁鞍山114051

为提高硫氧镁水泥(MOSC)的耐水性,以煅烧沸石粉为掺合料制备MOSC,研究了煅烧前后沸石粉对MOSC凝结时间、力学性能、耐水性、相组成、微观形貌和孔结构的影响.结果表明:掺入煅烧沸石粉提高了MOSC的力学性能,且煅烧前后的沸石粉均可在MOS... 详细信息

为提高硫氧镁水泥(MOSC)的耐水性,以煅烧沸石粉为掺合料制备MOSC,研究了煅烧前后沸石粉对MOSC凝结时间、力学性能、耐水性、相组成、微观形貌和孔结构的影响.结果表明:掺入煅烧沸石粉提高了MOSC的力学性能,且煅烧前后的沸石粉均可在MOSC体系中反应形成水化硅酸镁(M-S-H)凝胶,降低了MOSC的总孔隙率,提高了MOSC的耐水性,但掺入煅烧沸石粉的MOSC耐水性更优;MOSC中掺入20%经200℃煅烧、升温速率15℃/min处理的沸石粉后,MOSC的耐水性最优,其28 d抗压和抗折强度保留系数分别可达0.91、0.95.

关键词：硫氧镁水泥煅烧沸石粉耐水性相组成微观形貌

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基于MEMS技术的集成压力-湿度传感器

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电子科技大学学报 2024年第1期53卷 21-28页

作者：陈果刘正波王韬张万里电子科技大学集成电路科学与工程学院成都611731 贵州航天智慧农业有限公司贵阳550000

设计了一种高灵敏度的集成压力和湿度传感单元的芯片。压力传感单元基于SOI和蛇形电阻结构。室温下,传感器在载压范围为3~129 kPa内灵敏度为0.026 mV/kPa,与有限元仿真基本吻合。传感器在25~120℃范围内的热灵敏度漂移为0.004‰FS/℃,... 详细信息

设计了一种高灵敏度的集成压力和湿度传感单元的芯片。压力传感单元基于SOI和蛇形电阻结构。室温下,传感器在载压范围为3~129 kPa内灵敏度为0.026 mV/kPa,与有限元仿真基本吻合。传感器在25~120℃范围内的热灵敏度漂移为0.004‰FS/℃,热零点漂移为0.25%FS/℃。湿度传感单元采用的叉指电极和电容式结构,引入含氟PI作湿度敏感膜。设计Mo电阻加热结构加快传感器降湿过程,缩短降湿时间近32%。在10%~90%RH的湿度范围,含氟PI湿度传感器的灵敏度为0.121 pF/%RH,略低于无氟PI器件。含氟基团的引入,使得传感器的湿滞较无氟PI降低16%。“电容-湿度”曲线呈指数分布,相关系数R^(2)=0.996。测试结果发现,湿度传感单元和压力传感单元拥有良好的独立工作性能。

关键词：电容式湿度传感器惠斯通电桥 MEMS工艺聚酰亚胺(PI) 压力传感器

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Facies character and geochemical signature in the late Quaternary meteoric diagenetic carbonate succession at the Xisha Islands,South China Sea

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Acta Oceanologica Sinica 2021年第3期40卷 94-111页

作者： wanli chen Xiaoxia Huang Shiguo Wu Gang Liu Haotian Wei Jiaqing Wu Laboratory of Marine Geophysics and Georesources Institute of Deep-sea Science and EngineeringSanya 572000China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266034China University of China Academy of Sciences Beijing 100049China Institute of Earth and Environmental Science University of PotsdamPotsdam 14476Germany Institute of Marine Geology Survey Bureau of Hainan Marine Geology SurveyHaikou 570206China Key Laboratory of Marine Geological Resources and Environment of Hainan Province Marine Geological Survey Institute of Hainan ProvinceHaikou 570206China College of Marine Geosciences Ocean University of ChinaQingdao 266100China

The late Quaternary shallow-water carbonates have been altered by a variety of diagenetic processes,and further influenced by high-amplitude global and regional sea level changes.This study utilizes a new borehole drilled on the Yongxing Island,Xisha Islands to investigate meteoric diagenetic alteration in the late Quaternary shallowwater carbonates.Petrographic,mineralogical,stable isotopic and elemental data provide new insights into the meteoric diagenetic processes of the reef limestone.The results show the variation in the distribution of aragonite,high-Mg calcite(HMC)and low-Mg calcite(LMC)divides the shallow-water carbonates in Core SSZK1 into three intervals,which are UnitⅠ(31.20-55.92 m,LMC),UnitⅡ(18.39-31.20 m,aragonite and LMC)and UnitⅢ(upper 18.39 m of core,aragonite,LMC and HMC).Various degrees of meteoric diagenesis exist in the identified three units.The lowermost UnitⅠhas suffered almost complete freshwater diagenesis,whereas the overlying UnitsⅡandⅢhave undergone incompletely meteoric diagenesis.The amount of time that limestone has been in the freshwater diagenetic environment has the largest impact on the degree of meteoric diagenesis.Approximately four intact facies/water depth cycles are recognized.The cumulative depletion of elements such as strontium(Sr),sodium(Na)and sulphur(S)caused by duplicated meteoric diagenesis in the older reef sequences are distinguished from the younger reef sequences.This study provides a new record of meteoric diagenesis,which is well reflected by whole-rock mineralogy and geochemistry.

关键词： shallow-water carbonates meteoric diagenesis elemental concentration facies cycles Xisha Islands late Quaternary

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X60、X70管线钢及其焊接接头氢脆敏感性的对比研究

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表面技术 2024年第4期53卷 117-124页

作者：王万里陈烨占先强刘俊建汤文明大唐锅炉压力容器检验中心有限公司合肥230088 大唐华东电力试验研究院合肥230088 合肥工业大学材料科学与工程学院合肥230009

目的开展电解渗氢管线钢及其焊接接头显微组织和力学性能研究,为掺氢天然气管线服役安全可靠性评估提供支持。方法X60、X70管线钢及其焊接接头试样在100mA/cm^(2)下进行24h电解渗氢后,开展有、无渗氢情况下相关试样的显微组织结构、氢... 详细信息

目的开展电解渗氢管线钢及其焊接接头显微组织和力学性能研究,为掺氢天然气管线服役安全可靠性评估提供支持。方法X60、X70管线钢及其焊接接头试样在100mA/cm^(2)下进行24h电解渗氢后,开展有、无渗氢情况下相关试样的显微组织结构、氢热脱附、拉伸力学性能与断口形貌测试分析,揭示渗氢对X60、X702种管线钢及其焊接接头氢脆敏感性的影响规律。结果X60及X70管线钢以细小多边形铁素体为主,其焊缝和热影响区以粗大的粒状或板条贝氏体为主。相对于X70管线钢,其焊接接头具有更高的氢渗透性和稳定性。渗氢导致X60、X70管线钢及其焊接接头试样的强度与塑性降低,渗氢X70焊接接头力学性能衰减最为明显,拉伸断口呈准解理断裂特征。结论X70管线钢的氢脆敏感性高于X60管线钢,管线钢焊接接头的氢脆敏感性高于母材。

关键词：管线钢焊接接头电解渗氢热脱附氢脆敏感性

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肠胃清对裸小鼠大肠癌皮下移植瘤生长及STAT3、Bcl-2剪接异构体表达的影响

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中医杂志 2024年第8期65卷 849-857页

作者：陈彬邓皖利梁芳袁旭谢曼丽刘慧上海中医药大学附属普陀医院上海市普陀区200062 上海中医药大学

目的探讨肠胃清治疗大肠癌的可能作用机制。方法选用HCT 116肠癌细胞株,制备沉默多聚嘧啶区结合蛋白3(PTBP3)基因、过表达PTBP3基因稳转的肠癌细胞;72只裸小鼠随机分为3组,各组分别通过腋下注射沉默PTBP3的稳转细胞、过表达PTBP3的稳转... 详细信息

目的探讨肠胃清治疗大肠癌的可能作用机制。方法选用HCT 116肠癌细胞株,制备沉默多聚嘧啶区结合蛋白3(PTBP3)基因、过表达PTBP3基因稳转的肠癌细胞;72只裸小鼠随机分为3组,各组分别通过腋下注射沉默PTBP3的稳转细胞、过表达PTBP3的稳转细胞、未转染的肠癌细胞,构建沉默模型、过表达模型、对照模型3种大肠癌细胞皮下移植瘤模型,每种模型24只。造模成功后将对照模型裸小鼠随机分为对照模型组、对照肠胃清组、对照奥沙利铂组,沉默模型裸小鼠随机分为沉默模型组、沉默肠胃清组、沉默奥沙利铂组,过表达模型裸小鼠随机分为过表达模型组、过表达肠胃清组、过表达奥沙利铂组,每组均为8只。各肠胃清组肠胃清口服液灌胃剂量为35.9625 g/kg,腹腔注射0.2 ml生理盐水;各模型组以0.5 ml生理盐水灌胃,腹腔注射0.2 ml生理盐水;各奥沙利铂组腹腔注射奥沙利铂5 mg/kg(0.2 ml),以0.5 ml生理盐水灌胃,各组均灌胃每日1次,腹腔注射每周3次。给药31天后检测各组皮下瘤瘤重并计算抑瘤率,免疫组化法检测增殖细胞核抗原Ki67表达水平、细胞凋亡水平;实时荧光定量法、Western Blot检测各组皮下瘤组织PTBP3、信号转导及转录活化因子3(STAT3)剪接异构体α(STAT3α)、STAT3剪接异构体β(STAT3β)、B细胞淋巴瘤/白血病2(Bcl-2)剪接异构体α(Bcl-2α)、Bcl-2剪接异构体β(Bcl-2β)的mRNA及蛋白表达。结果在对照模型、沉默模型和过表达模型中,各肠胃清组和奥沙利铂组皮下瘤瘤重、皮下瘤组织Ki67表达水平均低于各相应模型组,细胞凋亡水平均高于各相应模型组(P<0.05或P<0.01);沉默肠胃清组和过表达肠胃清组皮下瘤组织PTBP3、STAT3α、Bcl-2α的mRNA和蛋白表达水平均低于相应模型组,STAT3β、Bcl-2β的mRNA和蛋白表达水平均高于相应模型组(P<0.05或P<0.01)。沉默各组皮下瘤瘤重、皮下瘤组织Ki67表达水平及皮下瘤组织中PTBP3、STAT3α、Bcl-2α的mRNA和蛋白表达水平均低于对照相应各组,细胞凋亡水平及皮下瘤组织STAT3β、Bcl-2β的mRNA和蛋白表达水平均高于对照相应各组;过表达各组皮下瘤瘤重、皮下瘤组织Ki67表达水平及皮下瘤组织中PTBP3、STAT3α、Bcl-2αmRNA和蛋白表达水平均高于对照相应各组,细胞凋亡水平及皮下瘤组织STAT3β、Bcl-2β的mRNA和蛋白表达水平均低于对照相应各组(P<0.05或P<0.01)。各奥沙利铂组抑瘤率分别高于各肠胃清组。与对照相应各组比较,沉默相应各组抑瘤率均为正值,过表达相应各组抑瘤率均为负值。结论PTBP3可促进肠癌细胞增殖、抑制细胞凋亡,上调肠癌细胞中STAT3α、Bcl-2α的表达,下调STAT3β、Bcl-2β的表达;肠胃清治疗大肠癌可能与其可抑制PTBP3,进而调控STAT3α、STAT3β、Bcl-2α、Bcl-2β表达作用相关。

关键词：大肠癌选择性剪接肠胃清多聚嘧啶区结合蛋白3 信号转导及转录活化因子3 B细胞淋巴瘤/白血病2

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