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Frontiers of Mathematics in China 2022年第5期17卷 943-960页

作者： Hongcai MA yunxiang bai Aiping DENG Department of Applied Mathematics Donghua UniversityShanghai 201620China Institute for Nonlinear Sciences Donghua UniversityShanghai 201620China

The(2+1)-dimensional generalized Bogoyavlensky-Konopelchenko equation is a significant physical model.By using the long wave limit method and confining the conjugation conditions on the interrelated solitons,the general M-lump,high-order breather,and localized interaction hybrid solutions are investigated,respectively.Then we implement the numerical simulations to research their dynamical behaviors,which indicate that different parameters have very different dynamic properties and propagation modes of the waves.The method involved can be validly employed to get high-order waves and study their propagation phenomena of many nonlinear equations.

关键词： Bogoyavlensky-Konopelchenko equation long wave limit M-lump solution hybrid solution

Failure-analysis of carbon nanotubes and their extreme applications

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Nano Research 2023年第11期16卷 12364-12383页

作者： Mingquan Zhu yunxiang bai Runyi Gao Yajing Liu Peng Zhang Hui Zhang Luqi Liu Zhong Zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China

The study of material failure is crucial for the design of engineering applications,as it can have significant social and economic impacts.Carbon nanotubes(CNTs),with their exceptional electrical,mechanical,and thermal properties,hold immense potential for a wide range of cutting-edge applications such as superstrong fiber,lightning strike protector,and even space elevator.This review provides an overview of the advancement in understanding the mechanical and electrical failure study of CNTs and their assemblies,serving as a comprehensive reference for utilizing CNTs in various forms.To begin,we emphasize the importance of studying material failure and provide a brief introduction to CNTs.Subsequently,we explore the mechanical and electrical failure characteristics of CNTs and their assemblies,along with notable examples of applications that utilize their failure-resistant properties,such as flywheel energy storage and lightning strike protection.Lastly,we present perspectives associated with analyzing CNT failure and its implications for extreme applications.

关键词： carbon nanotubes failure-analysis flywheel energy storage lightning strike protection

Controlled growth of crossed ultralong carbon nanotubes by gas flow

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Nano Research 2020年第7期13卷 1988-1995页

作者： Zhenxing Zhu yunxiang bai Nan Wei Jun Gao Silei Sun Chenxi Zhang Fei Wei Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Nano Materials Group Department of Applied Physics and Center for New MaterialsSchool of ScienceAalto UniversityPO Box 15100Fl-00076 AaltoFinland

Carbon nanotubes(CNTs)work as the promising components of miniature electromechanical systems due to their ecellent performances from individual to bundle scales.But it's challenging to achieve precise patterning at nanoscale resolution with controlled position and orientation.Here,we demonstrate a fluidic strategy to interlace one-dimensional(1D)ultralong CNTs into the crossed pattern in a one-step in-situ process.Semi-circular substrates of different diameters were placed in front of the growth substrate to change the path and momentum of gas flow.Such flow perturbation caused by substrates could be markedly reflected within a micro-channel reactor,which led to formation of crossed utralong CNTs at definite positions.Furthermore,precise control over the crossing angle as well as the diameter distribution of CNTs was achieved by varying the CNT length and diameter of semi-circular substrates.Our strategy has offered a feasible route for production of crossed ultralong CNTs and will contribute to multidimensional fluidic assembly of flexible nanomaterals.

关键词： crossed ultralong carbon nanotubes nanoscale patterning controlled synthesis fluidic assembly

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黑格尔论家庭伦理对自由实现的意义及限度

高校马克思主义理论研究 2024年第1期10卷 117-125页

作者：白云翔南开大学马克思主义学院

在黑格尔看来,真实的自由是在普遍伦理秩序与个体意志之间达至一种内在的和谐。其中,普遍伦理秩序囊括现实世界中具有必然性的伦理生活,家庭是其中兼具始点与终点意义的重要环节;此外,家庭伦理形态同古希腊社会模式具有一致性,它是人类... 详细信息

在黑格尔看来,真实的自由是在普遍伦理秩序与个体意志之间达至一种内在的和谐。其中,普遍伦理秩序囊括现实世界中具有必然性的伦理生活,家庭是其中兼具始点与终点意义的重要环节;此外,家庭伦理形态同古希腊社会模式具有一致性,它是人类社会发展一个阶段的缩影,这是家庭与自由实现产生联系的历史原因。从合乎人的需要出发,黑格尔认为爱是家庭伦理的精神,它体现自由的本质,自由在家庭里的实现即爱现实化自身的过程。黑格尔通过思辨逻辑进一步揭示出:家庭作为伦理的最初形态,其在活动范围和理性参与等维度存在局限,这推动伦理向其他环节过渡以追求更高形态的自由,而后续自由的实现又依赖于家庭伦理对个体整体意识的最初培养。

关键词：黑格尔家庭伦理自由实现伦理秩序整体意识

Mechanical Behavior of Single and Bundled Defect-Free Carbon Nanotubes

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Accounts of Materials Research 2021年第11期2卷 998-1009页

作者： yunxiang bai Hongjie Yue Rufan Zhang Weizhong Qian Zhong Zhang Fei Wei Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication and CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China

CONSPECTUS:Superstrong materials can be utilized in many fields such as bulletproof vests,airframes,suspension bridges,flywheel energy storage,etc.As one of the strongest materials,carbon nanotubes(CNTs)can potentially be used to fabricate superstrong fibers.However,the tensile strength of CNTs is impaired a lot by defects,and the CNT fibers prepared so far have strengths much lower than that of a single CNT,showing a“size effect”.The conventional study of solid mechanics is usually based on the assumption that materials contain defects.Defect-free ultralong CNTs can hopefully help us avoid the“size effect”of nanomaterials and produce superstrong CNT fibers.They would also provide a system for the study of the mechanical behavior of ideal solids with a nonlocalized“quantum stress singularity”.In this Account,we discuss our recent studies on the mechanical behavior of defect-free single CNTs and CNT bundles.First,we introduce the defect-free structure of ultralong CNTs,which is one type of ideal solid.Second,we review the investigation of the static tensile properties and dynamic fatigue resistance and their temperature-dependence of single centimeters long defect-free CNTs.The results showed that defect-free CNTs have superior comprehensive mechanical properties,including superstrength,-toughness,and-durability.Different from traditional materials,the fatigue lifetime and fracture of CNTs are dominated by the first single-bond-sized defect(quantum stress singularity),showing“superbrittleness”.Third,by using a gas flow focusing in situ synthesis method as well as a synchronous tightening and relaxing strengthening strategy,we successfully fabricated CNT bundles with tensile strengths approaching that of single CNTs and showed that the“size effect”can be avoided.In addition,the advantages and promising future of using CNTs in flywheel energy storage are discussed.Finally,we provide our perspectives on the challenges and future directions in this field.

关键词： singularity fatigue Bundle

量子点纳滤膜制备及染料去除性能实验教学设计

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实验室研究与探索 2024年第2期43卷 140-145页

作者：白云翔陈鑫董亮亮张春芳江南大学合成与生物胶体教育部重点实验室化学与材料工程学院江苏无锡214122

将膜分离实验与科学研究有机融合,设计了量子点复合纳滤膜制备及染料去除性能研究性实验。通过低温固相法合成氮化碳量子点,并以其为水相单体制备量子点复合纳滤膜。利用红外光谱、扫描电镜等对膜结构和形貌进行表征分析。氮化碳量子点... 详细信息

将膜分离实验与科学研究有机融合,设计了量子点复合纳滤膜制备及染料去除性能研究性实验。通过低温固相法合成氮化碳量子点,并以其为水相单体制备量子点复合纳滤膜。利用红外光谱、扫描电镜等对膜结构和形貌进行表征分析。氮化碳量子点与异氰酸酯发生反应,形成致密无缺陷的聚脲分离层。染料去除性能测试表明,制备的量子点纳滤膜可以有效去除水中的刚果红、甲基蓝、溴百里酚蓝钠盐、甲基红等负电性染料;随着氮化碳量子点浓度增加,复合纳滤膜水通量逐渐增大,甲基蓝去除率则呈现先升高后降低的趋势。实验涵盖了文献调研、材料制备、结构表征和性能测试,可使学生掌握多种实验技能,充分激发创新潜能,从而提高学生的自主学习能力、科学探究能力和创新实践能力。

关键词：量子点纳滤膜染料去除性能实验设计

PVDF催化膜的制备及去除水中盐酸四环素性能研究

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化工新型材料 2024年第6期52卷 195-200页

作者：陈禄荣智超刘贝贝董亮亮白云翔张春芳江南大学化学与材料工程学院合成与生物胶体教育部重点实验室无锡214122

将具有芬顿催化活性的普鲁士蓝类似物Fe-Co PBA负载到聚偏氟乙烯(PVDF)膜内,采用浸没沉淀相转化法制备了一种新型PVDF催化膜,用于去除水中盐酸四环素污染物。结果表明:负载Fe-Co PBA纳米粒子既能提高PVDF膜表面亲水性、孔隙率和水通量,... 详细信息

将具有芬顿催化活性的普鲁士蓝类似物Fe-Co PBA负载到聚偏氟乙烯(PVDF)膜内,采用浸没沉淀相转化法制备了一种新型PVDF催化膜,用于去除水中盐酸四环素污染物。结果表明:负载Fe-Co PBA纳米粒子既能提高PVDF膜表面亲水性、孔隙率和水通量,又能赋予PVDF膜催化活性;当Fe-Co PBA负载量为10%(质量分数)时,PVDF催化膜的纯水通量达到418.47L/(m^(2)·h),与纯PVDF膜相比提高了3.24倍。PVDF催化膜具有优异的抗生素去除性能和催化稳定性,当H_(2)O_(2)浓度为400mmol/L时,基于芬顿反应的PVDF催化膜对质量浓度20mg/L盐酸四环素的去除率达到90%;重复使用10次后,PVDF催化膜对盐酸四环素去除率仍保持在85%以上。

关键词：普鲁士蓝类似物催化膜聚偏氟乙烯抗生素

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低渗油藏降压增注体系研究

石化技术 2024年第2期31卷 152-154页

作者：刘恒宋健白云翔张亮穆蒙中石化胜利油田石油工程技术研究院山东东营257000

我国低渗油藏油气储量丰富,探明储量为141亿吨,占全国油气总储量的49.2%,胜利油田的低渗油藏探明储量占总储量20%。随着油气储存总量的逐步下降,低渗油藏的战略意义日渐提高,高效开发低渗油藏对稳定和发展我国石油工业具有重要意义。“... 详细信息

我国低渗油藏油气储量丰富,探明储量为141亿吨,占全国油气总储量的49.2%,胜利油田的低渗油藏探明储量占总储量20%。随着油气储存总量的逐步下降,低渗油藏的战略意义日渐提高,高效开发低渗油藏对稳定和发展我国石油工业具有重要意义。“水井功能性减阻增注补能”技术、有效解决了低渗油藏难注入、有效期短的问题,实现低渗油藏水驱大幅度提高采收率的目的,为油田开发提采增效保驾护航。

关键词：降压现场应用低渗油藏

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汉代模块化生产的考古学观察

考古 2022年第11期 107-120,F0002页

作者：白云翔山东大学历史文化学院济南市250100

模块化生产方式指将复杂的生产进行多块的简单分解,再由分解后的各个模块集成生产。巫山麦沱汉墓出土的陶俑是汉代模块化生产的一个典型例证。模块化生产方式在汉代的官府和民营手工业中都较流行,产品既有丧葬用品也有实用器具。反映出... 详细信息

模块化生产方式指将复杂的生产进行多块的简单分解,再由分解后的各个模块集成生产。巫山麦沱汉墓出土的陶俑是汉代模块化生产的一个典型例证。模块化生产方式在汉代的官府和民营手工业中都较流行,产品既有丧葬用品也有实用器具。反映出“古典式模块化生产”在汉代已趋于成熟,成为近现代工业生产中模块化生产的先声。

关键词：汉代手工业模块化生产考古学

汉代中韩交流的最新实物例证——韩国庆山阳地里汉镜及相关问题

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文物 2022年第1期 43-51页

作者：白云翔山东大学历史文化学院

汉代作为中国历史上封建帝国时代的第一个发展高峰期,不仅物质文明和精神文明空前发达,而且中外交流也空前高涨。伴随着汉王朝开启国门、走向世界的历史脚步,汉朝物产也随之向世界各地尤其是周边国家和地区传播,成为汉文化走向世界的重... 详细信息

汉代作为中国历史上封建帝国时代的第一个发展高峰期,不仅物质文明和精神文明空前发达,而且中外交流也空前高涨。伴随着汉王朝开启国门、走向世界的历史脚步,汉朝物产也随之向世界各地尤其是周边国家和地区传播,成为汉文化走向世界的重要物质载体[1]。在此过程中,铜镜作为汉朝的物产之一也随之大规模向域外传播,成为当时中外交流的重要"使者"。韩国庆山市阳地里墓群汉代铜镜的出土,作为韩国境内汉镜的最新发现,成为汉代中韩交流的最新实物例证。

关键词：汉王朝中韩交流走向世界汉镜帝国时代汉代铜镜中外交流域外传播