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β-Cyclodextrin polymer networks stabilized gold nanoparticle with superior catalytic activities

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Nano Research 2021年第4期14卷 1018-1025页

作者： Yong Zhang Bing Hu Xiao-Mei Cao Liang Luo Yu Xiong Zhi-Peng Wang Xin Hong san-yuan ding Key Laboratory of Organo-pharmaceutical Chemistry Gannan Normal UniversityCollege of Chemistry and Chemical EngineeringGanzhou 341000China State Key Laboratory of Applied Organic Chemistryy College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou 730000China Department of Chemistry Tsinghua UniversityBeijing 100084China

Support materials play a significant role in heterogeneous *** this work,β-cyclodextrin(β-CD)was used directly as a monomer to construct polymer networks for gold nanoparticles(Au NPs)*** the simple nucleophilic substitution reaction,β-CD based polymer networks(β-CDP-N andβ-CDP-C)were successfully *** toβ-CDP-C,the hydroxyl groups and N atoms inβ-CDP-N played a synergistic role in immobilizing smaller Au NPs,thus leading to high catalytic ***,the apparent rate constant(Kapp)value for Au@β-CDP-N in the reduction of 4-nitrophenol to 4-aminophenol is 14.15×10^(-2)s^(-1),which shows a significant improvement over all previously reported Au NPs with solid supports under similar *** the negligible porosity of theβ-CDP-N support,we purposed a"capture-catalysis-release"model to explain the high catalytic activity of Au@β-*** explanation is supported by the guest-responsive properties ofβ-***,the Au@β-CDP-N is easily recycled and maintained its high catalytic efficiency after seven successful cycles.

关键词： β-cyclodextrin polymer Au nanoparticles superior catalytic activity 4-nitrophenol reduction

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构筑未来:框架化学的研究前沿与产业化展望

中国科学：化学 2024年第6期54卷 815-821页

作者：岳衎丁三元雷浩卜显和陈小明付雪峰国家自然科学基金委员会化学科学部北京100085 华南理工大学前沿软物质学院广州510640 兰州大学功能有机分子化学国家重点实验室化学化工学院兰州730000 暨南大学广东省功能配位超分子材料及应用重点实验室化学与材料学院广州510632 南开大学材料科学与工程学院天津300350 中山大学化学学院广州510275

基于“框架化学的基础及应用研究”研讨会,本文阐述了“框架化学”的科学内涵,从框架结构的设计合成、精确表征、高性能化和产业应用四个方面综述了框架化学领域的主要研究进展,凝练了该领域的关键科学问题,并提出了面向国家需求和产业... 详细信息

基于“框架化学的基础及应用研究”研讨会,本文阐述了“框架化学”的科学内涵,从框架结构的设计合成、精确表征、高性能化和产业应用四个方面综述了框架化学领域的主要研究进展,凝练了该领域的关键科学问题,并提出了面向国家需求和产业发展的重点发展方向.

关键词：框架化学多孔材料金属-有机框架共价有机框架超分子有机框架

Flower solid modeling based on sketches

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第4期9卷 481-488页

作者： Zhan ding Shu-chang XU Xiu-zi YE Yin ZHANG san-yuan ZHANG State Key Lab of CAD ＆ CG School of Computer Science Zhejiang University Hangzhou 310027 China

In this paper we propose a method to model flowers of solid shape. Based on (Ijiri et al., 2005)’s method, we separate individual flower modeling and inflorescence modeling procedures into structure and geometry modeling. We incorporate interactive editing gestures to allow the user to edit structure parameters freely onto structure diagram. Furthermore, we use free-hand sketching techniques to allow users to create and edit 3D geometrical elements freely and easily. The final step is to automatically merge all independent 3D geometrical elements into a single waterproof mesh. Our experiments show that this solid modeling approach is promising. Using our approach, novice users can create vivid flower models easily and freely. The generated flower model is waterproof. It can have applications in visualization, animation, gaming, and toys and decorations if printed out on 3D rapid prototyping devices.

关键词： Solid modeling Floral diagram Inflorescence Gesture Constrained Delauny triangulation (CDT) Freehand sketching

Advances in ethnopharmacology,phytochemistry and pharmacology of Erigerontis Herba and its Chinese medicine prescriptions

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Traditional Medicine Research 2025年第1期10卷 44-61页

作者： Yang Zhou yuan-Yan Huang ding-Yue Shang Ying Chen Meng Tian Cheng-Yu Jin Xin Lu Bing-Chun Yan Han-Qing Pang Institute of Translational Medicine School of MedicineYangzhou UniversityYangzhou 225009China Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases Yangzhou UniversityYangzhou 225009China School of Medicine Nanjing University of Chinese MedicineNanjing 210023China State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Guangxi Normal UniversityGuiling 541004China.

Erigerontis Herba(EH),the dried whole plant of Erigeron breviscapus,is well-known for circulating blood,activating meridians to alleviate pain,expelling wind,and clearing away *** has been extensively utilized in southern China for the treatment of stroke hemiplegia,chest stuffiness and pains,rheumatic arthralgia,headache,and *** review focuses on the botany,ethnopharmacology,phytochemistry,pharmacology and toxicity of EH and its related prescriptions to offer new insights for prospective research of *** information about EH was retrieved from ancient records and books,PubMed,China National Knowledge Infrastructure,Chinese Pharmacopoeia,Web of Science,Doctoral and Master’s Theses,and various electronic *** is a member of Compositae family and is mainly grown in southern *** Chinese medicine records that EH has the effects of circulating blood and removing blood stasis,expelling wind,and removing cold,as well as relieving rigidity of muscle and relieving *** now,nearly 200 ingredients have been characterized from EH,including flavonoids,caffeoyls,aromatic acids,coumarins,pentacyclic terpenoids,volatile oil and other *** extracts,EH related prescriptions(Dengzhan Xixin injection,Dengzhan Shengmai capsules,etc.)or compounds(scutellarin,scutellarein,etc.)possessed obvious therapeutic effects of ischemic stroke,cerebral hemorrhage,myocardial infarction,Alzheimer’s disease,diabetes and its complications,gastric cancer,bone,and joint degenerative ***,the major active compound of EH,has been used as a quality *** no obvious toxicity of EH has been *** to its traditional applications,ethnopharmacology,phytochemistry,pharmacology,and toxicity,EH was applied as a valuable herb for clinical application in food and medicine *** several compounds have been shown to possess diverse biological activities,the underlying mechanisms of their actions remain *** fully exploi

关键词： Erigeron breviscapus traditional applications ethnopharmacology phytochemistry pharmacology

Signature of high-order azimuthal MHD body modes in sunspot's low atmosphere

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Research in Astronomy and Astrophysics 2015年第9期15卷 1449-1454页

作者： ding yuan Centre for mathematical Plasma Astrophysics Department of Mathematics

The five-minute oscillations inside sunspots appear to be the absorption of the solar p-mode. It is a potential tool to probe a sunspot＇s sub-structure. We studied the collective properties of five-minute oscillations in the power and phase distribution at the sunspot＇s umbra-penumbra boundary. The azimuthal distributions of the power and phase of five-minute oscillations enclosing a sunspot＇s umbra were obtained with images taken with the Solar Dynamics Observatory/Atmospheric Imaging Assembly （SDO/AIA）. The azimuthal modes were quantified with periodogram analysis and justified with significance tests. The azimuthal nodal structures in an approximately ax- ially symmetric sunspot AR 11131 （2010 Dec 08） were investigated. Mode numbers ra = 2, 3, 4, 7, 10 were obtained in both 1700 A and 1600A bandpasses. The 1600A channel also revealed an extra mode at m = 9. In the upper atmosphere （304 A）, fewer modes were detected at m = 3, 4, 7. The azimuthal modes in the sunspot＇s low atmo- sphere could be interpreted as high-order azimuthal MHD body modes. They were detected in the power and phase of the five-minute oscillations in sunspot AR 11131 with SDO/AIA data. Fewer modes were detected in the sunspot＇s upper atmosphere.

关键词： Sun atmosphere - Sun UV radiation -- Sun sunspots

Aerodynamic design on high-speed trains

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Acta Mechanica Sinica 2016年第2期32卷 215-232页

作者： san-san ding Qiang Li Ai-Qin Tian Jian Du Jia-Li Liu School of Mechanical Electronic and Control EngineeringBeijing Jiaotong University CSR Qingdao Sifang Locomotive & Rolling Stock Co. Ltd.

Compared with the traditional train,the operational speed of the high-speed train has largely improved,and thedynamicenvironmentofthetrainhaschangedfromoneof mechanical domination to one of aerodynamic *** aerodynamic problem has become the key technological challenge of high-speed trains and significantl affects the economy,environment,safety,and *** this paper,the relationships among the aerodynamic design principle,aerodynamic performance indexes,and design variables are firs studied,and the research methods of train aerodynamics are proposed,including numerical simulation,a reducedscale test,and a full-scale *** schemes of train aerodynamics involve the optimization design of the streamlined head and the smooth design of the body *** design of the streamlined head includes conception design,project design,numerical simulation,and a reduced-scale *** design of the body surface is mainly used for the key parts,such as electric-current collecting system,wheel truck compartment,and *** aerodynamic design method established in this paper has been successfully applied to various high-speed trains（CRH380A,CRH380 AM,CRH6,CRH2 G,and the Standard electric multiple unit（EMU）） that have met expected design *** research results can provide an effective guideline for the aerodynamic design of high-speed trains.

关键词： High-speed train Aerodynamic design Optimization design Smooth design

Efficacy of Yiqiyangxin Chinese medicine compound combined with cognitive therapy in the treatment of generalized anxiety disorders

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Asian Pacific Journal of Tropical Medicine 2012年第10期5卷 818-822页

作者： Ting Wang Jing-yuan ding Guang-Xing Xu Yu Zeng san-Rong Xiao School of Psychology and Cognitive Science East China Normal University East China sanatorium Department of Management Hainan Medical University

Objective:To observe the clinical efficacy of Yiqiyangxin Chinese medicine compound combined with cognitive therapy on generalized anxiety ***:A total of 202 generalized anxiety disorders patients were randomly allocated to a control condition(Paroxetine combined with cognitive therapy) or a treatment condition(Yiqiyangxin Chinese medicine compound combined with cognitive therapy).Subsequently,scores of Hamilton Anxiety Scale(HAMA), Zung Self-rating Anxiety Scale(SAS) and blood routine,urine routine,liver function,renal function,electrocardiogram were detected before treatment,3 months,6 months after treatment and 6 months after medicine withdrawal,***:HAMA and SAS scores were significantly reduced in two groups(P0.05).HAMA and SAS scores were significantly increased in two groups(P<0.05) after medicine withdrawal,and there were significant differences in HAMA and SAS scores,recurrent disease and adverse reaction(P<0.001). The incidence of recurrent disease and adverse reaction in treatment group was *** two groups showed no apparent abnormality in blood routine,urine routine,liver and renal function, and ***:Yiqiyangxin Chinese medicine compound combined with cognitive therapy can significantly reduce the recurrence after medicine withdrawal and is effective on generalized anxiety ***,the incidence of adverse reactions is low. The treatment program is worthy clinic application in the further.

关键词： Yiqiyangxin Chinese medicine Compound Cognitive therapy Generalized anxiety disorder

Proximal-Based Pre-correction Decomposition Methods for Structured Convex Minimization Problems

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Journal of the Operations Research Society of China 2014年第2期2卷 223-235页

作者： yuan-yuan Huang san-Yang Liu School of Mathematics and Statistics Xidian UniversityXi’an 710071China

This paper presents two proximal-based pre-correction decomposition methods for convex minimization problems with separable *** methods,derived from Chen and Teboulle’s proximal-based decomposition method and He’s parallel splitting augmented Lagrangian method,remain the nice convergence property of the proximal point method and could compute variables in parallel like He’s method under the prediction-correction *** results are established without additional *** the efficiency of the proposed methods is illustrated by some preliminary numerical experiments.

关键词： Structured convex programming Parallel splitting Proximal point method Augmented Lagrangian Prediction-correction method

Abrupt Flood–Drought Alternation in Southern China during Summer 2019

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Journal of Meteorological Research 2021年第6期35卷 998-1011页

作者： yuan yuan Hui GAO Ting ding National Climate Center China Meteorological AdministrationBeijing 100081

We investigated the abrupt alternation from flood to drought in southern China during summer 2019 using multiple *** anomalies of precipitation occurred in southern China in the summer of 2019 and the daily precipitation in the south of the middle and lower reaches of the Yangtze River valley showed an abrupt change from flood to drought conditions around *** highest precipitation in 39 yr was recorded between 1 June and 14 July *** circulation systems affecting this high precipitation included a persistent deepened East Asian trough,the southward location of the western Pacific subtropical high,an intensified East Asian subtropical jet,an anomalous low-level cyclone from southern Japan to southern China,and extremely strong positive vorticity over the Jiangnan *** different atmospheric circulation anomalies from 15 July to 31 August caused continuously high temperatures,below-normal precipitation,and severe drought in Jiangnan *** investigations showed that the sudden change in atmospheric circulation around mid-July started in the mid and lower troposphere and was influenced by the northward track of Tropical Cyclone Danas in the northwestern Pacific.

关键词： abrupt changes summer precipitation East Asian trough western Pacific subtropical high tropical cyclone