Artificial metamaterials have attracted widespread attention of research communities due to their anomalous physical properties compared to those of conventional materials.In this study,we designed a three-dimensiona...Artificial metamaterials have attracted widespread attention of research communities due to their anomalous physical properties compared to those of conventional materials.In this study,we designed a three-dimensional(3D)lightweight metaarchitecture consisting of 6-connected anti-chiral honeycombs.The mechanical properties(e.g.Young’s modulus,compression strength,and Poisson’s ratio)of the proposed meta-architecture could be programmed by adjusting a series of geometric parameters,as shown through numerical simulations.Moreover,an optically sensitive polymer-based 3D meta-architecture with 6-connected anti-chiral features was constructed by the stereolithography method.Owing to the regulation of the negative Poisson’s ratio,3D meta-architecture achieved a greater ductility under compression than those of traditional truss structures while retaining a relatively high strength and low density.Compression experiments validated the excellent tunability of the mechanical properties of the proposed 3D 6-connected antichiral structure.The results suggest the promising applications of this structure in lightweight aircraft,vibration isolation,and mechanical sensors.展开更多
为了解海洋生物修复的发展趋势与研究前沿,本研究以Web of Science核心数据库近17年(1996-2022)的文献为研究对象,运用CiteSpace软件进行文献计量分析与可视化知识图谱分析。研究发现,近年来我国海洋生物修复领域快速发展,发文量位列第...为了解海洋生物修复的发展趋势与研究前沿,本研究以Web of Science核心数据库近17年(1996-2022)的文献为研究对象,运用CiteSpace软件进行文献计量分析与可视化知识图谱分析。研究发现,近年来我国海洋生物修复领域快速发展,发文量位列第一;该领域主要研究内容为海洋污染物、海洋污染治理技术和海洋环境,研究热点集中在“生物降解”和“原油污染生物修复”;国际间的学术合作呈现出“大分散、小集中”的特征,研究机构之间交流较少,跨地区合作亟待加强;当前研究聚焦于海洋生物修复技术的开发与优化,国内外学者应该加强学术交流与合作,突破技术难关,加快恢复海洋生态环境。展开更多
基金financially supported by the National Natural Science Foundation of China(Grant No.52073132),Science Fund for Distinguished Young Scholars of Gansu Province(Grant No.18JR3RA263),the Fundamental Research Funds for the Central Universities(Grant No.lzujbky-2020-ct05),the Talent Innovation and Entrepreneurship Project of Lanzhou(Grant No:2019-RC-42),and the 2019 Civil-Military Integration Project of Lanzhou(Grant No:GF-2019-ZA-QT-05)。
文摘Artificial metamaterials have attracted widespread attention of research communities due to their anomalous physical properties compared to those of conventional materials.In this study,we designed a three-dimensional(3D)lightweight metaarchitecture consisting of 6-connected anti-chiral honeycombs.The mechanical properties(e.g.Young’s modulus,compression strength,and Poisson’s ratio)of the proposed meta-architecture could be programmed by adjusting a series of geometric parameters,as shown through numerical simulations.Moreover,an optically sensitive polymer-based 3D meta-architecture with 6-connected anti-chiral features was constructed by the stereolithography method.Owing to the regulation of the negative Poisson’s ratio,3D meta-architecture achieved a greater ductility under compression than those of traditional truss structures while retaining a relatively high strength and low density.Compression experiments validated the excellent tunability of the mechanical properties of the proposed 3D 6-connected antichiral structure.The results suggest the promising applications of this structure in lightweight aircraft,vibration isolation,and mechanical sensors.
文摘为了解海洋生物修复的发展趋势与研究前沿,本研究以Web of Science核心数据库近17年(1996-2022)的文献为研究对象,运用CiteSpace软件进行文献计量分析与可视化知识图谱分析。研究发现,近年来我国海洋生物修复领域快速发展,发文量位列第一;该领域主要研究内容为海洋污染物、海洋污染治理技术和海洋环境,研究热点集中在“生物降解”和“原油污染生物修复”;国际间的学术合作呈现出“大分散、小集中”的特征,研究机构之间交流较少,跨地区合作亟待加强;当前研究聚焦于海洋生物修复技术的开发与优化,国内外学者应该加强学术交流与合作,突破技术难关,加快恢复海洋生态环境。
