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基于功能化COFs材料的样品前处理技术在新兴污染物中的研究进展

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分析测试学报 2025年第1期44卷 12-24页

作者：潘自宇刘智敏许志刚昆明理工大学理学院云南昆明650500

新兴污染物因具有环境持久性、生物累积性、生物毒性以及在环境中痕量存在等特点而备受全球众多国家关注。因此,对环境、食品以及生物样品中的新兴污染物进行高灵敏检测至关重要。传统样品前处理技术存在耗时长、吸附剂用量大,以及对不... 详细信息

新兴污染物因具有环境持久性、生物累积性、生物毒性以及在环境中痕量存在等特点而备受全球众多国家关注。因此,对环境、食品以及生物样品中的新兴污染物进行高灵敏检测至关重要。传统样品前处理技术存在耗时长、吸附剂用量大,以及对不稳定污染物的分析准确性差等缺点,因此,亟需开发设计具有高选择性、高传质效率的新型材料作为前处理技术的吸附剂,以实现新兴污染物的高选择、高灵敏检测。共价有机骨架材料(COFs),特别是功能化的COFs材料,因具有比表面积大、结构可设计、稳定且构筑基元丰富等诸多优点而被广泛用于新兴污染物的富集。该文主要综述了近年来功能化COFs材料的合成策略及其作为样品前处理吸附剂在环境、食品和生物样品中新兴污染物中的分析应用,并对该类材料的未来发展趋势进行了展望。

关键词：新兴污染物功能化COFs材料样品前处理技术

从句子图到篇章图——基于抽象语义表示的篇章级共指标注体系研究

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外语学刊 2025年第1期 19-28页

作者：张艺璇李斌许智星南京师范大学文学院南京210097 南京师范大学语言大数据与计算人文研究中心南京210097

篇章级共指关系是语言学和计算语言学的研究难点之一。本文在梳理共指理论研究与趋势的基础上,回顾共指语料库的构建与自动解析方法,指出共指语料的构建主要存在以下两个问题:共指关系的标注较为粗疏,也基本不考虑与句子语义结构本身的... 详细信息

篇章级共指关系是语言学和计算语言学的研究难点之一。本文在梳理共指理论研究与趋势的基础上,回顾共指语料库的构建与自动解析方法,指出共指语料的构建主要存在以下两个问题:共指关系的标注较为粗疏,也基本不考虑与句子语义结构本身的关系。本文在句子级语义标注体系(中文抽象语义表示)的基础上,设计篇章共指的标注体系,以“概念同一性”为基本原则,从词形的异同和概念的表述角度区分9种篇章共指关系,标注了500个篇章的共指信息。与已完整标注的52种句内语义关系相结合,构建出带有篇章共指信息的篇章抽象语义图库。该语料库选自CTB新闻语料,体裁涵盖经济、体育及生活类,规模为6237句,16万词例。该语料库的构建为篇章级语义分析提供了新框架与数据资源。

关键词：篇章共指抽象语义表示概念同一性篇章语义结构语料库中文信息处理

Engineering lattice defects in 2D nanomaterials for enhancing biomedical performances

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Particuology 2022年第5期20卷 121-133页

作者： zhi Qi Li Li zhi Ping xu Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQLD 4072Australia

2D nanomaterials are widely investigated for biomedical applications,attributed to their large specific surface area,high therapeutic loading capacity,and unique optical,thermal,and/or electronic *** defects affect the theranostic performance of 2D nanomaterials significantly by altering their electronic properties and chemical *** investigations have shown that defect-rich 2D nanomaterials are capable of enhancing tumor treatment through efficient drug delivery,photothermal and photodynamic therapies(PTT and PDT),and improving diagnostics via computed tomography(CT),photoacoustic and magnetic resonance *** review summarizes recent progresses,including synthesis,characterization approach,and applications of defect-engineered 2D nanomaterials that are potentially useful in cancer *** expert opinions are also proposed as the conclusion.

关键词： 2D nanomaterials Engineering lattice defects Cancer theranostics Phototherapy

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屈原研究之我见

三峡大学学报（人文社会科学版） 2025年第1期47卷 13-17页

作者：徐志啸复旦大学中文系上海200433

历史上确有屈原其人,他创作的作品据《汉书·艺文志》记载共25篇,其中《离骚》是代表作,集中表现了屈原的人物形象、坎坷经历及其理想追求。屈原的初衷是当政治家、改革家,旨在振兴楚国,而不是要成为文学家和诗人。屈原的爱楚国,与今天... 详细信息

历史上确有屈原其人,他创作的作品据《汉书·艺文志》记载共25篇,其中《离骚》是代表作,集中表现了屈原的人物形象、坎坷经历及其理想追求。屈原的初衷是当政治家、改革家,旨在振兴楚国,而不是要成为文学家和诗人。屈原的爱楚国,与今天的爱国主义,不是同一概念。屈原属于堪与意大利但丁比肩的世界一流大诗人。从某种意义上可以说,楚辞姓“楚”,屈原姓“屈”。

关键词：屈原《离骚》改革家世界大诗人爱国主义

Exact mobility edges and topological phase transition in two-dimensional non-Hermitian quasicrystals

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Science China(Physics,Mechanics & Astronomy) 2022年第2期65卷 82-90页

作者： zhi-Hao xu xu Xia Shu Chen Institute of Theoretical Physics and State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi UniversityTaiyuan 030006China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Chern Institute of Mathematics and LPMC Nankai UniversityTianjin 300071China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Yangtze River Delta Physics Research Center Liyang 213300China

The emergence of the mobility edge(ME)has been recognized as an important characteristic of Anderson *** difficulty in understanding the physics of the MEs in three-dimensional(3 D)systems from a microscopic image encourages the development of models in lower-dimensional systems that have exact *** most of the previous studies are concerned with one-dimensional(1 D)quasiperiodic systems,the analytic results that allow for an accurate understanding of two-dimensional(2 D)cases are *** this work,we disclose an exactly solvable 2 D quasicrystal model with parity-time(PT)symmetry displaying exact *** the thermodynamic limit,we unveil that the extended-localized transition point,observed at the PT symmetry breaking point,is topologically characterized by a hidden winding number defined in the dual *** coupling waveguide platform can be used to realize the 2 D non-Hermitian quasicrystal model,and the excitation dynamics can be used to detect the localization features.

关键词： quasicrystals mobility edges non-Hermitian systems localization properties

Oscillation Theorems for Quasilinear Elliptic Differential Equations

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Acta Mathematica Sinica,English Series 2007年第7期23卷 1189-1198页

作者： zhi Ting xu School of Mathematical Sciences South China Normal University

By using vector Riccati transformation and averaging technique, some oscillation criteria for the quasilinear elliptic differential equation of second order,ΣNi,j=1Di[Ψ（y）Aij（x）｜Dy｜^p-2Djy]＋p（x）f（y）=0,are obtained. These theorems extend and include earlier results for the semilinear elliptic equation and PDE with p-Laplacian.

关键词： oscillation quasilinear elliptic equation second order vector Riccati transformation

Averaging Technique for the Oscillation of Second Order Damped Elliptic Equations

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Acta Mathematica Sinica,English Series 2008年第5期24卷 829-842页

作者： zhi Ting xu School of Mathematical Sciences South China Normal University Guangzhou 510631 P. R. China

By using the averaging technique, we establish some oscillation theorems for the second order damped elliptic differential equation N↑∑↓i,j=1 Di[AIY（x）Djy]＋N↑∑↓i=1 bi（x）Diy＋c（x）f（y）=0 which extend and... 详细信息

关键词： oscillation averaging technique second order elliptic differential equation damped

Oscillation Criteria for Second Order Mixed Nonlinear Elliptic Equations

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Acta Mathematicae Applicatae Sinica 2015年第4期31卷 1049-1060页

作者： zhi-ting xu School of Mathematical Sciences South China Normal University

By using the refinement of the standard integral averaging technique, we obtain some oscillation criteria for second order mixed nonlinear elliptic equations. The results established in this paper extend and improve s... 详细信息

关键词： oscillation elliptic equations mixed nonlinear integral averaging technique

Oscillation of Second Order Semilinear Elliptic Equations with Damping

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Acta Mathematica Sinica,English Series 2010年第11期26卷 2165-2178页

作者： zhi Ting xu School of Mathematical Sciences South China Normal University Guangzhou 510631 P. R. China

We obtain some new Kamenev-type oscillation theorems for the second order semilinear elliptic differential equation with damping N ∑i,j=1Di[aij（x）Djy]＋N∑i=1bi（x）Diy＋c（x）f（y）=0 under quite general assumptions. These results are extensions of the recent results of Sun [Sun, Y. G.： New Kamenev-type oscillation criteria of second order nonlinear differential equations with damping. J. Math. Anal. Appl., 291, 341-351 （2004）] in a natural way. In particular, we do not impose any additional conditions on the damped functions bi （x） except the continuity. Several examples are given to illustrate the main results.

关键词： Oscillation damped semilinear elliptic differential equations second order