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Integrating of metal-organic framework UiO-66-NH2 and cellulose nanofibers mat for high-performance adsorption of dye rose bengal

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Frontiers of Chemical Science and Engineering 2022年第9期16卷 1387-1398页

作者： Yuyao Han Lei Xia Xupin Zhuang yuxia liang State Key Laboratory of Separation Membranes and Membrane Processes National Center for International Joint Research on Separation MembranesTiangong UniversityTianjin 300387China School of Textile Science and Engineering Tiangong UniversityTianjin 300387China School of Mathematical Sciences Tianjin Normal UniversityTianjin 300387China

UiO-66-NH2 is an efficient material for removing pollutants from wastewater due to its high specific surface area,high porosity and water ***,recycling them from wastewater is *** this study,the cellulose nanofibers mat deacetylated from cellulose acetate nanofibers were used to combine with UiO-66-NH_(2)by the method of in-situ growth to remove the toxic dye,rose *** to previous work,the prepared composite could not only provide ease of separation of UiO-66-NH_(2)from the water after adsorption but also demonstrate better adsorption capacity(683 mg∙g‒1(T=25°C,pH=3))than that of the simple UiO-66-NH_(2)(309.6 mg∙g^(‒1)(T=25℃,pH=3)).Through the analysis of adsorption kinetics and isotherms,the adsorption for rose bengal is mainly suitable for the pseudo-second-order kinetic model and Freundlich ***,the relevant research revealed that the main adsorption mechanism of the composite was electrostatic interaction,hydrogen bonding andπ–π***,the approach depicts an efficient model for integrating metal-organic frameworks on cellulose nanofibers to improve metal-organic framework recovery performance with potentially broad applications.

关键词： UiO-66-NH_(2) cellulose nanofibers rose bengal adsorption mechanism

Nearly invariant subspaces for shift semigroups

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Science China Mathematics 2022年第9期65卷 1895-1908页

作者： yuxia liang Jonathan R.Partington School of Mathematical Sciences Tianjin Normal UniversityTianjin 300387China School of Mathematics University of LeedsLeeds LS 29JTUK

Let{T(t)}_(t≥0) be a C_(0)-semigroupon an infinite-dimensional separable Hilbert space;a suitable definition of near{T(t)^(*)}_(t≥0) invariance of a subspace is presented in this paper.A series of prototypical examples for minimal nearly{S(t)^(*)}_(t≥0) invariant subspaces for the shift semigroup{S(t)}_(t≥0) on L^(2)(0,∞)are demonstrated,which have close links with near T_(θ)^(*)invariance on Hardy spaces of the unit disk for an inner functionθ.Especially,the corresponding subspaces on Hardy spaces of the right half-plane and the unit disk are related to model *** work further includes a discussion on the structure of the closure of certain subspaces related to model spaces in Hardy spaces.

关键词： nearly invariant subspace C_(0)-semigroup shift semigroup model space

Numerical Range of the Linear Combination of Volterra Operator and Its Adjoint

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Journal of Mathematical Research with Applications 2023年第2期43卷 234-240页

作者： Jinxian WANG yuxia liang School of Mathematical Science Tianjin Normal University

The classical Volterra operator V and its adjoint operator V*play important roles in the complex space L2[0, 1]. As to the properties of linear combination of V and V*, we present the equivalent condition ensuring z1V +z2V*（z1, z2∈ C） satisfies the accretive property. Then an accurate representation of the numerical range of（u+iv）I +mV +n V*（u, v, m, n ∈ R, m+n ≥ 0）is described in this paper.

关键词： Volterra operator the adjoint operator numerical range

Estimating Changes in Contact Patterns in China Over the First Year of the COVID-19 Pandemic:Implications for SARS-CoV-2 Spread—Four Cities,China,2020

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China CDC weekly 2023年第5期5卷 113-119,I0012-I0017页

作者： yuxia liang Cheng Peng Qian You Maria Litvinova Marco Ajelli Juanjuan Zhang Hongjie Yu School of Public Health Fudan UniversityKey Laboratory of Public Health SafetyMinistry of EducationShanghai MunicipalityChina Laboratory for Computational Epidemiology and Public Health Department of Epidemiology and BiostatisticsIndiana University School of Public HealthBloomingtonINUSA Shanghai Institute of Infectious Disease and Biosecurity Fudan UniversityShanghai MunicipalityChina

Introduction:Previous studies have demonstrated significant changes in social contacts during the firstwave coronavirus disease 2019(COVID-19)in Chinese *** purpose of this study was to quantify the time-varying contact patterns by age in Chinese mainland in 2020 and evaluate their impact on the transmission of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).Methods:Diary-based contact surveys were performed for four periods:baseline(prior to 2020),outbreak(February 2020),post-lockdown(March–May 2020),and post-epidemic(September–November 2020).We built a Susceptible-Infected-Recovered(SIR)model to evaluate the effect of reducing contacts on ***:During the post-epidemic period,daily contacts resumed to 26.7%,14.8%,46.8%,and 44.2%of the pre-COVID levels in Wuhan,Shanghai,Shenzhen,and Changsha,*** suggests a moderate risk of resurgence in Changsha,Shenzhen,and Wuhan,and a low risk in *** closure alone was not enough to interrupt transmission of SARS-CoV-2 Omicron BA.5,but with the addition of a 75%reduction of contacts at the workplace,it could lead to a 16.8%reduction of the attack *** control an outbreak,concerted strategies that target schools,workplaces,and community contacts are ***:Monitoring contact patterns by age is key to quantifying the risk of COVID-19 outbreaks and evaluating the impact of intervention strategies.

关键词： mainland resume contacts

Differences of Weighted Composition Operators from Mixed-Norm Spaces to Weighted-Type Spaces

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Journal of Mathematical Research with Applications 2012年第5期32卷 615-625页

作者： Xianhao ZHAO,yuxia liang Department of Mathematics,Tianjin University,Tianjin 300072,P.R.China Department of Mathematics Tianjin University Tianjin 300072

In this paper,we study the boundedness and estimate the essential norm of the differences of weighted composition operators from mixed-norm spaces to weighted-type spaces on the unit ball of CN.

关键词： weighted composition operator mixed-norm spaces weighted-type space essential norm difference.

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从戏剧结构看《牡丹亭》杜宝形象的复杂性

江苏大学学报（社会科学版） 2009年第6期11卷 57-60页

作者：梁瑜霞西安文理学院文学院陕西西安710068

从戏剧结构上看,《牡丹亭》属于复线结构。主线描写杜丽娘和柳梦梅的爱情故事,围绕主线展开的戏剧冲突,表达了作者对"情欲"和"礼教"关系的倾向性。副线描写南宋王朝的抗金斗争,在家国矛盾中,作者在以杜宝这个身份特殊的人物,将主线和副... 详细信息

从戏剧结构上看,《牡丹亭》属于复线结构。主线描写杜丽娘和柳梦梅的爱情故事,围绕主线展开的戏剧冲突,表达了作者对"情欲"和"礼教"关系的倾向性。副线描写南宋王朝的抗金斗争,在家国矛盾中,作者在以杜宝这个身份特殊的人物,将主线和副线有机地糅合在一起的同时,也赋予杜宝这个人物形象以复杂性和矛盾性:他既是封建礼教的维护者、执行者,又是作者理想的"修身、齐家、治国、平天下"的正派官吏形象;同时,杜宝身上还隐约渗透了作者的自我形象。

关键词：汤显祖《牡丹亭》复线结构杜宝复杂性

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提升检察职能履行效果评估研究

中国刑事法杂志 2010年第12期12卷 94-97页

作者：梁玉霞方明暨南大学法学院广东省珠海市人民检察院

社会各界评估检察职能履行情况,依据的是检察机关的工作信息。这些信息如果不准确、不真实、不全面,就必然会影响评估的正确性。提升检察职能履行效果评估,应依法履行法律监督职能,提高检察机关的地位,阳光检察,优化作风,顺畅沟通。

关键词：检察职能履行效果公共表达实证评估

Cu^+/I_2共同催化的Blaise反应

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有机化学 2017年第1期37卷 209-212页

作者：王嫘梁玉霞张宝冯亚青天津大学化工学院天津300072 天津大学天津化工协同创新中心天津300072 天津市功能精细化学品技术工程中心天津300072

以(S)-4-氯-3-三甲基硅氧基丁腈和溴乙酸叔丁酯锌试剂为原料,Cu^+或I_2单独催化的Blaise反应收率与不使用催化剂的反应相比最高提高了约20%,而两者共同催化下的Blaise反应收率由无催化剂的72.1%提高至97.0%,从机理上对结果进行了合理解... 详细信息

以(S)-4-氯-3-三甲基硅氧基丁腈和溴乙酸叔丁酯锌试剂为原料,Cu^+或I_2单独催化的Blaise反应收率与不使用催化剂的反应相比最高提高了约20%,而两者共同催化下的Blaise反应收率由无催化剂的72.1%提高至97.0%,从机理上对结果进行了合理解释.该项研究为Blaise反应的广泛应用提供了一个高效的方法,为他汀类药物关键中间体尤其是瑞舒伐他汀和阿托伐他汀侧链的合成开发了一条收率高、操作简单的路线,同时为构建C—C键的反应提供了新的参考点.

关键词： Blaise反应催化瑞舒伐他汀侧链

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Fock型空间上的广义不确定原理

数学物理学报（A辑） 2020年第6期40卷 1409-1419页

作者：吴海桂梁玉霞天津师范大学数学科学学院天津300387

该文利用单边加权移位算子构造了广泛的自伴算子对,进而给出了Fock型空间上广义不确定原理的表达式及其等号成立的条件.该结果推广了依赖于求导算子和乘法算子的不确定原理表达形式,可为解决量子力学等前沿学科的相关热点问题提供理论依据.

关键词： Fock型空间不确定原理自伴算子单边加权移位算子