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Preliminary geological interpretation of long-wavelength magnetic anomalies over China and surrounding regions

Earth and Planetary Physics 2024年第3期8卷 445-458页

作者： Jie Wang YanYan Yang ZhiMa Zeren Jian Wang Xin Wang yuxin luo XuHui Shen National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China Key Laboratory of Compound and Chained Natural Hazards Dynamics Ministry of Emergency Management of ChinaBeijing 100085China School of Emergency Management Science and Engineering University of Chinese Academy of SciencesBeijing 100049China National Space Science Center Chinese Academy of SciencesBeijing 100190China

Long-wavelength(>500 km)magnetic anomalies originating in the lithosphere were first found in satellite magnetic surveys.Compared to the striking magnetic anomalies around the world,the long-wavelength magnetic anomalies in China and surrounding regions are relatively weak.Specialized research on each of these anomalies has been quite inadequate;their geological origins remain unclear,in particular their connection to tectonic activity in the Chinese and surrounding regions.We focus on six magnetic high anomalies over the(1)Tarim Basin,(2)Sichuan Basin(3)Great Xing’an Range,(4)Barmer Basin,(5)Central Myanmar Basin,and(6)Sunda and Banda Arcs,and a striking magnetic low anomaly along the southern part of the Himalayan-Tibetan Plateau.We have analyzed their geological origins by reviewing related research and by detailed comparison with geological results.The tectonic backgrounds for these anomalies belong to two cases:either ancient basin basement,or subduction-collision zone.However,the geological origins of large-scale regional magnetic anomalies are always subject to dispute,mainly because of limited surface exposure of sources,later tectonic destruction,and superposition of multi-phase events.

关键词： long-wavelength magnetic anomaly lithospheric magnetic anomaly lithospheric magnetic field model satellite magnetic survey CSES

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Preparation of CeO_(2) abrasives by reducing atmosphere-assisted molten salt method for enhancing their chemical mechanical polishing performance on SiO_(2)substrates

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Journal of Rare Earths 2023年第10期41卷 1627-1635,I0006页

作者： Ning Xu Jiahui Ma Qi Liu yuxin luo Yongping Pu School of Material Science and Engineering Shaanxi University of Science&TechnologyXi'an710021China Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials Xi'an710021China

Ce^(3+)as the active site on the CeO_(2)abrasive surface is the key to enhancing the material removal rate(MRR).The CeO_(2)abrasives with high chemical activity were prepared by the molten salt method under a reducing atmosphere.The crystal structure and morphology of CeO_(2)abrasive s were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),Fourier transform infrared spectroscopy(FT-IR),ultraviolet—visible diffuse reflectance spectroscopy(UV-Vis DRS),and X-ray photoelectron spectroscopy(XPS).The CeO_(2)abrasives were obtained under different atmospheres(Air,Ar,and Ar/H_(2)).With the enhancement of the reducing atmosphere,the morphology of the abrasives transforms from spherical to octahedral,while more oxygen vacancies and Ce^(3+)are generated on the surface of CeO_(2)abrasives.The CMP experiments show that the MRRs of the CeO_(2)-Air,CeO_(2)-Ar,and CeO_(2)-Ar/H_(2)abrasives on SiO_(2)substrates are 337.60,578.74,and 691.28 nm/min,respectively.Moreover,as confirmed by atomic force microscopy(AFM),the substrate surfaces exhibit low roughness(20.5 nm)after being polished using all of the prepared samples.Especially,the MRR of CeO_(2)-Ar/H_(2)abrasives is increased by 104.76%compared with CeO_(2)-air abrasives.The improved CMP performance is attributed to the increased Ce^(3+)concentration and the octahedral morphology of the abrasives enhancing the chemical reaction and mechanical removal at the abrasive-substrate interface.

关键词： CeO_(2) Chemical mechanical polishing(CMP) Reducing atmosphere Material removal rate(MRR) Molten salt method Rare earths

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Connotation and Strategies of High-quality Development of Farmers' Cooperatives in Ethnic Minority Areas : A Case Study of Guizhou Province

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Asian Agricultural Research 2023年第2期15卷 1-5,10页

作者： yuxin luo School of Foreign Languages Qiannan Normal University for NationalitiesGuizhou 558000China

During the "14^(th) Five-Year Plan" period, consolidating the achievements of poverty alleviation, promoting rural revitalization and the high-quality development of farmers' cooperatives will overlap at the same time in the spatial field of ethnic minority areas, and they have consistency in content and commonality in value. The high-quality development of farmers' cooperatives in ethnic minority areas is an important organizational way to realize the modernization of agricultural industry, and it is also the key to consolidating the achievements of poverty alleviation and promoting rural revitalization at this stage. Because there is a gap between ethnic minority areas and developed areas in key factors of production such as capital, market, labor and technology, the development of farmers' cooperatives in ethnic minority areas faces more difficulties. This paper takes the development status and outstanding problems of farmers' cooperatives in Guizhou Province as the research object, discusses the connotation and significance of the high-quality development of farmers' cooperatives, and puts forward some strategies and suggestions on the governance of hollowing cooperatives, the allocation of key production factors, and the improvement of the quality of cooperatives.

关键词： Farmers'cooperatives High-quality development Strategies

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文学“小史”与历史“大事”——“新史学”与胡适《谈新诗》的批评理路

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武汉大学学报（哲学社会科学版） 2024年第3期77卷 125-132页

作者：罗义华骆羽芯中南民族大学文学与新闻传播学院湖北武汉430074

胡适兼具新史学家与新文学家的身份,他的新诗批评彰显了“以史入文”和“以文入史”的辩证法。一方面,他取径“新史学”的核心观念与方法,将“进化”史观、科学实证等融进《谈新诗》一文,使其呈现历史和科学的双重维度,依循着一条“以... 详细信息

胡适兼具新史学家与新文学家的身份,他的新诗批评彰显了“以史入文”和“以文入史”的辩证法。一方面,他取径“新史学”的核心观念与方法,将“进化”史观、科学实证等融进《谈新诗》一文,使其呈现历史和科学的双重维度,依循着一条“以史入文”的批评理路。另一方面,他以《谈新诗》一文参与新诗史的建构又折射出其以新诗批评进入历史的文学诉求,体现了“以文入史”的批评意图。在文史互动视域下钩沉“新史学”与《谈新诗》的互动渊源与路径,为窥见“新史学”在胡适文学观念中的位置与功能、辨析“新史学”与“新文学”之间的隐秘联系,提供了一个具体而微的佐证。

关键词：胡适新史学《谈新诗》新诗批评新文学文史互动

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锈蚀钢筋混凝土黏结滑移本构模型及数值模拟应用

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哈尔滨工业大学学报 2024年第1期56卷 139-150页

作者：杨路郑山锁郑跃罗雨欣西安建筑科技大学土木工程学院西安710055 结构工程与抗震教育部重点实验室(西安建筑科技大学) 西安710055

为研究纵筋与箍筋共同锈蚀对钢筋混凝土黏结性能的影响,采用电渗—恒电流—干湿循环的加速锈蚀方法对25个钢筋混凝土(RC)试件进行锈蚀,进而对其进行拉拔试验,研究了纵筋锈蚀、箍筋锈蚀、保护层厚度和箍筋间距等参数对黏结性能的影响规... 详细信息

为研究纵筋与箍筋共同锈蚀对钢筋混凝土黏结性能的影响,采用电渗—恒电流—干湿循环的加速锈蚀方法对25个钢筋混凝土(RC)试件进行锈蚀,进而对其进行拉拔试验,研究了纵筋锈蚀、箍筋锈蚀、保护层厚度和箍筋间距等参数对黏结性能的影响规律。分析了锈蚀对混凝土与钢筋界面间黏结力的影响,将黏结性能退化归因于材料性能退化和约束效应退化,基于试验数据,建立并验证了一个考虑设计参数、纵筋及箍筋共同锈蚀的修正黏结滑移本构模型。结合所提本构模型及微元算法建立了锈蚀纵筋应力-滑移模型,基于OpenSees平台,将所建模型应用于零长度截面单元中,通过串联纤维梁柱单元与零长度截面单元建立了考虑黏结滑移变形的锈蚀RC构件数值模型,根据锈蚀RC柱拟静力试验数据对该模型的准确性进行验证,并采用仅考虑锈蚀损伤的纤维模型进行辅助验证。结果表明:混凝土与钢筋界面间黏结力随锈蚀程度的增加呈先上升后下降的趋势,增加保护层厚度可略微增加黏结强度,而箍筋加密对黏结强度提升明显;与纤维模型相比,所建锈蚀RC纤维模型承载力、累计耗能和极限位移误差分别降低12.8%、23.5%和14.2%,表明所建模型可合理计算钢筋滑移的贡献且准确预测锈蚀RC柱地震整体响应。

关键词：钢筋混凝土纵筋锈蚀箍筋锈蚀黏结滑移模型纤维模型

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Coherent control of spin tunneling in a driven spin–orbit coupled bosonic triple well

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Communications in Theoretical Physics 2022年第5期74卷 45-50页

作者： yuxin luo Jia Yi Wenjuan Li Xin Xie Yunrong luo Wenhua Hai Key Laboratory for Matter Microstructure and Function of Hunan Province and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of EducationSchool of Physics and ElectronicsHunan Normal UniversityChangsha 410081 China School of Management Hunan University of Information TechnologyChangsha 410151 China

We investigate the coherent control of spin tunneling for a spin–orbit(SO)coupled boson trapped in a driven triple well.In the high-frequency limit,the quasienergies of the system are obtained analytically and the fine energy band structures are shown.By regulating the driving parameters,we reveal that the directed spin-flipping or spin-conserving tunneling of an SOcoupled boson occurs along different pathways and in different directions.The analytical results are demonstrated by numerical simulations and good agreements are found.Further,an interesting scheme of quantum spin tunneling switch with or without spin-flipping is presented.The results may have potential applications in the design of spintronic devices.

关键词： coherent control spin tunneling spin-orbit coupling triple well

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高铁列车乘务作业视频YOLOv4算法分析应用研究

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铁道运输与经济 2024年第4期46卷 101-108,118页

作者：杨光罗雨欣万琛中国铁路上海局集团有限公司物资部上海200071 中国铁路上海局集团有限公司客运部上海200071 同济大学上海市轨道交通结构耐久与系统安全重点实验室上海201804

高速铁路列车视频记录仪摄录乘务班组值乘作业的主要过程,并作为工作质量标准评价的主要依据。传统的作业视频人工分析,缺乏有效的技术支撑和评价管理体系,导致监督不力,乘务作业标准执行不到位。研究通过基于机器学习的人工智能算法,应... 详细信息

高速铁路列车视频记录仪摄录乘务班组值乘作业的主要过程,并作为工作质量标准评价的主要依据。传统的作业视频人工分析,缺乏有效的技术支撑和评价管理体系,导致监督不力,乘务作业标准执行不到位。研究通过基于机器学习的人工智能算法,应用YOLOv4神经网络模型,提出一种高速铁路列车乘务作业视频分析方法,可以自动地识别列车内外作业要素,全面覆盖乘务组值乘周期,量化作业质量。该系统在算法结构上成熟稳定,满足各客运段多样化的训练需求和部署运行条件,具有配置灵活、荷载量大、评价准确的特点。现场应用以来,客运段高铁车队结合作业场景,横向内容分类,纵向流程梳理,形成作业规范闭环,在推进面向标准化、专业化、智能化的高速铁路客运乘务管理上取得了突破。

关键词：视频分析神经网络实时识别乘务评价智慧客运

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后疫情时代文旅产业的数字化创新与实践研究——以湖北荆门圣境花谷项目为例

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艺术科技 2024年第5期37卷 94-96,111页

作者：王敏罗雨欣湖北工业大学艺术设计学院湖北武汉430068

目的:认清后疫情时代文旅面临转型升级、产业供需失衡的问题,要紧跟国家战略导向,积极拥抱数字技术、创新消费场景、培育数字品牌新业态,以促进文旅创新发展。方法:文章总结后疫情时代文旅产业的现状,把控当下文旅市场的发展趋势,以湖... 详细信息

目的:认清后疫情时代文旅面临转型升级、产业供需失衡的问题,要紧跟国家战略导向,积极拥抱数字技术、创新消费场景、培育数字品牌新业态,以促进文旅创新发展。方法:文章总结后疫情时代文旅产业的现状,把控当下文旅市场的发展趋势,以湖北为例,梳理其在政策、资源、环境方面的文旅数字化创新基础与痛点。结果:立足湖北荆门的文旅项目实践,归纳形成具有应用性和可复制性的文旅数字化创新策略。结论:基于项目实践,提出发展“数字+”文旅产品多元变现模式、塑造“数字+”特色化文旅IP形象、打造“数字+”沉浸式文旅体验场景三点对策。

关键词：文旅产业文旅数字化后疫情时代数字化创新

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