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China Foundry 2024年第2期21卷 168-174页

作者： Zhi-yong Zhang Jiao-jiao Cheng Jia-qi Xie Shi-bing liu Kun Shi Jun Zhao Shenyang Research Institute of Foundry Co. Ltd.CAMShenyang 110022China National Key Laboratory of Advanced Casting Technologies Shenyang 110022China

Titanium matrix composites reinforced with ceramic particles are considered a promising engineering material due to their combination of high specific strength,low density,and high *** this study,the TA15-based composites reinforced with a volume fraction of 10% to 25%(TiB+TiC)were prepared using powder metallurgy and casting *** characterization and phase constitution were examined using optical microscopy(OM),scanning electron microscopy(SEM),and X-ray diffraction(XRD).In addition,the microhardness,room temperature(RT)and high temperature(HT)tensile properties of the composites were *** revealed that the reinforcements are distributed uniformly even in the composites with a high volume of TiB and ***,as the volume fraction exceeds 15%,TiB and TiC particles become coarsening and exhibit rod-like and dendritic-like *** increases gradually from 321.2 HV for the base alloy to a maximum of 473.3 HV as the reinforcement increases to 25vol.%.Tensile test results indicate that a reinforcement volume fraction above 20% is beneficial for enhancing tensile strength and yield strength at high temperatures,but it has an adverse effect on room temperature ***,if the reinforcement volume fraction is below 20%,it can improve high-temperature elongation when the temperature exceeds 600℃.

关键词： titanium matrix composites microstucture microhardness tensile properties in-situ synthesis

双边投资协定在非领土水域的适用问题研究——以涉海投资保障为主要视角

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上海对外经贸大学学报 2024年第1期31卷 79-96页

作者：刘子珩段星伊中国政法大学国际法学院北京100088 大连海事大学法学院辽宁大连116026

因《联合国海洋法公约》的出台及国际社会在海洋法层面实践活动的不断丰富,越来越多的双边投资协定通过“领土定义条款”的形式将领土以外的水域纳入适用范围。但因双边投资协定碎片化的特征,不同双边投资协定的领土定义条款存在显著差... 详细信息

因《联合国海洋法公约》的出台及国际社会在海洋法层面实践活动的不断丰富,越来越多的双边投资协定通过“领土定义条款”的形式将领土以外的水域纳入适用范围。但因双边投资协定碎片化的特征,不同双边投资协定的领土定义条款存在显著差异。此外,国家在不同水域所享有的主权性权利、管辖权的类型和范围亦有较大差异,使得特定双边投资协定能否在专属经济区、大陆架、公海、国际海底区域、其他国家管辖水域等非领土水域的适用,以及能够对哪些具体的涉海投资实现保障都需要单独加以判断。作为国际投资领域和海洋法领域具有广泛影响力的大国,中国应重视双边投资协定和海洋法之间的联动关系,以两者之间的互动为契机,尽快使更多双边投资协定能够实现在非领土水域的适用,并通过海洋法实践进一步扩大双边投资协定的适用范围,从而追求涉海投资保障以及有效参与全球海洋治理目标的共同实现。

关键词：双边投资协定联合国海洋法公约领土定义条款管辖权涉海投资保障

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压缩感知提频技术在莺琼盆地W1井区地震资料处理中的应用

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地质学报 2024年第6期98卷 1918-1927页

作者：李雷王祥春刘梦灵廖仪张国栋中海石油(中国)有限公司海南分公司研究院海南海口570300 中国地质大学(北京)地球物理与信息技术学院北京100083

针对莺琼盆地W1井区地震资料分辨率低、砂体展布及叠置关系复杂的问题,综合莺琼盆地W1井区三个年份的原始资料,设计了一套包括预处理、去噪处理、偏移以及偏后处理的整套资料处理流程。在偏后处理中将压缩感知提频技术应用于叠前深度偏... 详细信息

针对莺琼盆地W1井区地震资料分辨率低、砂体展布及叠置关系复杂的问题,综合莺琼盆地W1井区三个年份的原始资料,设计了一套包括预处理、去噪处理、偏移以及偏后处理的整套资料处理流程。在偏后处理中将压缩感知提频技术应用于叠前深度偏移剖面上,并与蓝色滤波提频技术、零相位反褶积提频技术进行了对比,体现了压缩感知提频技术的优势;运用压缩感知提频技术解决了莺琼盆地W1井区目前存在的地质问题,证明其在莺琼盆地W1井区后续开发实施上的合理性。结果表明:相较于其他两种提频技术,采用压缩感知提频技术可以保护主频以下可靠的低频信息,拓展高频,提高了资料的分辨率。通过压缩感知提频后的地震数据,气水关系更加清晰,砂体的叠置特征得以真实呈现,验证了其对后续油气勘探的指示意义。压缩感知提频技术作为一种新的地震资料处理技术,能够较好地解决地震资料分辨率低、砂体展布及叠置关系复杂等问题,值得在实际地震资料处理中推广应用。

关键词：压缩感知砂体叠置气水关系地震资料处理莺琼盆地

Water structures and anisotropic dynamics at Pt(211)/water interface revealed by machine learning molecular dynamics

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Materials Futures 2024年第4期3卷 1-10页

作者： Fei-Teng Wang Xiandong liu Jun Cheng State Key Laboratory of Physical Chemistry of Solid Surfaces iChEMCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005People’s Republic of China State Key Laboratory for Mineral Deposits Research School of Earth Sciences and EngineeringNanjing UniversityNanjingJiangsu 210023People’s Republic of China Frontiers Science Center for Critical Earth Material Cycling Nanjing UniversityNanjingJiangsu 210023People’s Republic of China Laboratory of AI for Electrochemistry(AI4EC) IKKEMXiamen 361005People’s Republic of China Institute of Artificial Intelligence Xiamen UniversityXiamen 361005People’s Republic of China

Water molecules at solid–liquid interfaces play a pivotal role in governing interfacial phenomena that underpin electrochemical and catalytic *** organization and behavior of these interfacial water molecules can significantly influence the solvation of ions,the adsorption of reactants,and the kinetics of electrochemical *** stepped structure of Pt surfaces can alter the properties of the interfacial water,thereby modulating the interfacial environment and the resulting surface *** the in situ details of water structures at these stepped Pt/water interfaces is crucial for understanding the fundamental mechanisms that drive diverse applications in energy conversion and material *** this work,we have developed a machine learning potential for the Pt(211)/water interface and performed machine learning molecular dynamics *** findings reveal distinct types of chemisorbed and physisorbed water molecules within the adsorbed ***,we identified three unique water pairs that were not observed in the basal plane/water interfaces,which may serve as key precursors for water *** interfacial water structures contribute to the anisotropic dynamics of the adsorbed water *** study provides molecular-level insights into the anisotropic nature of water behavior at stepped Pt/water interfaces,which can influence the reorientation and distribution of intermediates,molecules,and ions—crucial aspects for understanding electrochemical and catalytic processes.

关键词： machine learning molecular dynamics stepped Pt/water interfaces anisotropic water dynamics

高中化学实验教学中批判性思维培养的困境与破解路径

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化学教育（中英文） 2024年第7期45卷 9-15页

作者：刘玉荣吴沂蒙河南师范大学化学化工学院河南新乡453007

在高中化学实验教学中培养学生批判性思维能力有利于学生对知识的深度理解及综合能力的提高。但现行高中化学实验教学中面临以下困境:教学目标的设计缺失批判性思维要素,实验教学情境的诱思、激疑功能常被忽略,实验前后缺乏有挑战性的问... 详细信息

在高中化学实验教学中培养学生批判性思维能力有利于学生对知识的深度理解及综合能力的提高。但现行高中化学实验教学中面临以下困境:教学目标的设计缺失批判性思维要素,实验教学情境的诱思、激疑功能常被忽略,实验前后缺乏有挑战性的问题,实验探究缺乏质疑论证,忽视化学实验的反思评价。针对这些问题,提出了相应的破解路径并通过案例进行论证,以培养学生的批判性思维能力。破解路径主要包括以下几个方面:制定蕴含批判性思维的教学目标、创设“有矛盾”的实验教学情境,提出探究问题并引导思考,引导学生获取证据并谨慎推理,引导学生在综合判断中反思评价。

关键词：批判性思维高中化学实验教学

Targeting N4-acetylcytidine suppresses hepatocellular carcinoma progression by repressing eEF2-mediated HMGB2 mRNA translation

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Cancer Communications 2024年第9期44卷 1018-1041页

作者： Hailing liu Lei Xu Shiwei Yue Hongfei Su Xing Chen Qiumeng liu Hui Li Huifang Liang Xiaoping Chen Jiefeng He Zeyang Ding Bixiang Zhang Hepatic Surgery Center Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubeiP.R.China Hubei Key Laboratory of Hepato‑Pancreatic‑Biliary Diseases Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubeiP.R.China Department of Hepatopancreatobiliary Surgery Zhejiang Cancer HospitalHangzhou Institute of Medicine(HIM)Chinese Academy of SciencesHangzhouZhejiangP.R.China Department of Hepatobiliary Pancreatic Tumor Center Chongqing University Cancer HospitalSchool of MedicineChongqing UniversityChongqingP.R.China Key Laboratory of Organ Transplantation Ministry of EducationWuhanHubeiP.R.China Department of Hepatobiliary Surgery Key Laboratory of Hepatobiliary and Pancreatic Diseases of Shanxi Province(Preparatory)Shanxi Bethune HospitalShanxi Academy of Medical SciencesShanxi Medical UniversityTaiyuanShanxiP.R.China

Background:N4-acetylcytidine(ac4C)represents a novel messenger RNA(mRNA)modification,and its associated acetyltransferaseN-acetyltransferase 10(NAT10)plays a crucial role in the initiation and progression of tumors by regulating mRNA ***,its role in hepatocellular carcinoma(HCC)development and prognosis is largely *** study aimed to elucidate the role of NAT10-mediated ac4C in HCC progression and provide a promising therapeutic ***:The ac4C levels were evaluated by dot blot and ultra-performance liquid chromatography-tandem mass spectrometry with harvested HCC *** expression of NAT10 was investigated using quantitative real-time polymerase chain reaction,western blotting,and immunohistochemical staining across 91 cohorts of HCC *** explore the underlying mechanisms of NAT10-ac4C in HCC,we employed a comprehensive approach integrating acetylated RNA immunoprecipitation and sequencing,RNA sequencing and ribosome profiling analyses,along with RNA immunoprecipitation,RNA pulldown,mass spectrometry,and site-specific mutation *** drug affinity responsive targets stability,cellular thermal shift assay,and surface plasmon resonance assays were performed to assess the specific binding of NAT10 and ***,the efficacy of targeting NAT10-ac4C for HCC treatment was elucidated through in vitro experiments using HCC cells and in vivo HCCmouse ***:Our investigation revealed a significant increase in both the ac4C RNA level and NAT10 expression in ***,elevated NAT10 expression was associated with poor outcomes in HCC ***,silencing NAT10 suppressed HCC proliferation and metastasis in vitro and in ***,NAT10 stimulates the ac4C modification within the coding sequence(CDS)of high mobility group protein B2(HMGB2),which subsequently enhances HMGB2 translation by facilitating eukaryotic elongation factor 2(eEF2)binding to the ac4C sites on HMGB2 mRNA’s C

关键词： N4-acetylcytidine N-acetyltransferase 10 hepatocellular carcinoma mRNA translation targeted therapy

Unraveling role of double-exchange interaction in electrochemical water oxidation by external magnetic field

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Rare Metals 2024年第1期43卷 289-297页

作者： Jun Li Jun-Ming Li Hong Hong Dong-Xue liu Qing-Qi Cao Dun-Hui Wang National Laboratory of Solid State Microstructures and Jiangsu Provincial Key Laboratory for Nanotechnology Nanjing UniversityNanjing 210093China School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China

Double-exchange(DE) interaction plays an important role in electrocatalytic oxygen evolution reaction(OER).However,precise achievement of DE interaction often requires foreign dopants or vacancy engineering,leading to destabilization of the catalysts and deterioration of *** contrast,the utilization of environmentally friendly,contactless,and continuously adjustable magnetic fields to study the OER process is profitable to avoid aforementioned interference factors and further elucidate the direct relationship_(0.5)between DE interaction and OER ***,by using cobalt hydroxide carbonate(Co(OH)(CO_(3))·xH_(2)O,CoHC) nanostructures as a proof-of-concept study,external magnetic fields are carefully implemented to verify the role of DE interaction during water oxidation *** studies reveal that external magnetic fields effectively enhance the reaction rate of the catalyst,the overpotential decreases from 386 to 355 mV(100 mA·cm^(-2)),while Tafel slopes drastically decline from 93 to 67 mV·dec^(-1)(1.0 T).Moreover,magnetic field increment exhibits robust *** in situ Raman and impedance measurements under external field,it can be found that magnetic field promotes the electron migration between Co^(2+) and Co^(3+) in the CoHC catalysts with the assistance of DE interactions,thus boosting the OER efficiency.

关键词： Magnetic field Double-exchange(DE)interaction Electrocatalysis Oxygen evolution reaction(OER) Cobalt hydroxide carbonate

基于LSTM循环神经网络的船舶运动极短期预报

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船舶工程 2024年第5期46卷 33-40,55页

作者：张怡孟帅刘震封培元上海交通大学海洋工程国家重点实验室上海200240 中国船舶及海洋工程设计研究院上海200011

长短期记忆(LSTM)循环神经网络对于预报非线性时间序列有优势,尝试将LSTM网络应用于船舶运动极短期预报。利用某破冰船在北冰洋航行时两段典型海况下的横摇和纵摇运动实测数据,探究LSTM神经网络模型的预报精度和有效时长。研究发现,LST... 详细信息

长短期记忆(LSTM)循环神经网络对于预报非线性时间序列有优势,尝试将LSTM网络应用于船舶运动极短期预报。利用某破冰船在北冰洋航行时两段典型海况下的横摇和纵摇运动实测数据,探究LSTM神经网络模型的预报精度和有效时长。研究发现,LSTM神经网络模型在海况良好、船舶的运动周期性强且主导频率突出时可以取得满意预报效果。但随着时长的增加,误差会不断累积,精确度逐步降低。在编码器-解码器逐步迭代框架基础上利用多层感知机提出直接多步预报改进模型。研究发现,改进模型可以有效减少误差积累、提高预报精度和延长有效时间,尤其在恶劣海况下预报结果改善更为显著。研究成果可以为基于神经网络开发高效准确的船舶运动极短期预报方法提供参考。

关键词：极短期预报长短期记忆循环神经网络直接多步预报误差积累

社会—生态系统的事件解释框架及其合理性辩护

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系统科学学报 2024年第1期32卷 1-5,23页

作者：刘益宇许辰佳华南师范大学科学技术与社会研究院系统科学与系统管理研究中心广东广州510006

社会—生态系统(SES)概念是当前国际可持续发展领域中韧性研究的重要问题之一。实体解释是关于社会—生态系统概念及其分析框架的主流解释范式,这种解释路径基于主观-客观二分法,将社会—生态系统分解为社会实体和生态实体,例如安德列斯... 详细信息

社会—生态系统(SES)概念是当前国际可持续发展领域中韧性研究的重要问题之一。实体解释是关于社会—生态系统概念及其分析框架的主流解释范式,这种解释路径基于主观-客观二分法,将社会—生态系统分解为社会实体和生态实体,例如安德列斯-奥斯特罗姆的“诊断型”社会—生态系统分析框架。然而,实体解释路径的困境在于无法描述社会—生态系统的持续变化和互相缠绕等动力学特征。事件解释框架则基于一种新自然哲学,以事件延展和流变分析上述动力学特征,更加强调构建生态系统与社会系统的互动联结过程,以不断促进社会—生态韧性的知识转变,而且可以进一步建构具有可操作性的复杂适应系统框架分析。同时,溯因推理可以为事件解释框架的发现功能提供合理性辩护。

关键词：社会—生态系统事件解释框架韧性研究自然哲学动力学特征

Electricity-Heat-Based Integrated Demand Response Considering Double Auction Energy Market with Multi-Energy Storage for Interconnected Areas

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1688-1700页

作者： Dan Wang Deyu Huang Qing'e Hu Hongjie Jia Bo liu Yang Lei Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China Key Laboratory of Smart Energy&Information Technology of Tianjin Municipality Tianjin 30072China

With development of integrated energy systems and energy markets,transactive energy has received increasing attention from society and academia,and realization of energy distribution and integrated demand response through market transactions has become a current research *** on optimized operation of a distributed energy station as a regional energy supply center is of great significance for improving flexibility and reliability of the *** on retail-side energy trading market,this study first establishes a framework of combined electric and heating energy markets and analyses a double auction market mechanism model of interconnected distributed energy *** study establishes a mechanism model of energy market participants,and establishes the electric heating combined market-clearing model to maximize global surplus considering multi-energy ***,in the case study,a typical user energy consumption scenario in winter is selected,showing market-clearing results and demand response effects on a typical *** of transmission line constraints,energy supply equipment capacity,and other factors on clearing results and global surplus are compared and analyzed,verifying the effects of the proposed method on improving global surplus,enhancing interests of market participants and realizing coordination and optimal allocation of both supply and demand resources through energy complementarity between regions.

关键词： Double auction energy market integrated energy system interconnected energy stations multi-energy storage