检索结果-南通市图书馆

ON THE TRAIN WITH wang FUCHUN--Capturing the evolution of Chinese rail travel

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China Report ASEAN 2019年第9期4卷 30-33页

作者： wang fengjuan 不详

On an early autumn afternoon, wang Fuchun sits at his desk looking through a heavy picture album adorned with a dozen pale-green sticky notes. Titled The Chinese and Their Lives, it is another of wang’s documentary p... 详细信息

关键词： TRAIN Chinese rail travel wang Fuchun

wang OF THE MUQAM An art lover dedicated to collecting,recording,and preserving the traditional Uygur art form of Twelve Muqam

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China Report ASEAN 2021年第6期6卷 12-15页

作者： wang fengjuan 不详

Upon arriving back in Urumqi after a 500-kilometer trek across Xinjiang from Hami,wang Jiangjiang immediately began sorting the materials he collected on the trip:audio and video recordings from more than 30 Muqam ***... 详细信息

关键词： recording QAM sorting

Development of a High Early Strength Non-fuorine and Non-alkaline Flash Setting Admixture and Flash Mechanism

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Journal of Wuhan University of Technology(Materials Science) 2024年第6期39卷 1518-1527页

作者： SUN Guowen YANG Xinyu wang fengjuan wang Jinshuo LIU Zhiyong College of Materials Science and Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043China College of Materials Science and Engineering Southeast UniversityNanjing 211189China

To solve the problems of high rebound rate and strength reversion of shotcrete,a non-fluorine and non-alkaline liquid flash setting admixture(FSN)with low rebound and high early strength was synthesized under 60-65℃water bath environment through orthogonal test design and taking setting time and compressive strength as *** experimental results show that the optimum mass ratio of FSN is aluminum sulfate:diethanolamine:triethanolamine:pseudo-boehmite:lithium carbonate:water=57%:8%:0.05%:2%:2%:31%.When FSN is added with 7%of the mass of portland cement,the cement paste can be initially set in 3 min and finally set in 5 *** compressive strength of mortar is 1.2 MPa at 6 h,18.0 MPa at 1 d,and more than 100%at 28 days;The microscopic analysis shows that the rapid release of Li^(+),NH^(4+),and CO_(3)^(2-)ions by FSN in the paste solution effectively shortens the induction period of high C_(3)S content in Portland cement,directly forms early coagulation AFt crystals in FSN and CH dominated by Al_(2)(SO_(4))_(3),and forms a large number of C-S-H gels in the later stage,so that the cement can quickly coagulate and harden,and the strength in the later stage is not retracted.

关键词： shotcrete flash setting admixture aluminum sulfate high early strength flash mechanism

Design of Eco-friendly Ultra-high Performance Concrete with Supplementary Cementitious Materials and Coarse Aggregate

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Journal of Wuhan University of Technology(Materials Science) 2019年第6期34卷 1350-1359页

作者： JIANG Jinyang ZHOU Wenjing CHU Hongyan wang fengjuan wang Liguo FENG Taotao GUO Dong School of Materials Science and Engineering Southeast UniversityNanjing 211189China College of Civil Engineering Nanjing Forestry UniversityNanjing 210037China Naval Institute of Engmeering Design and Research PLABeijing 100070China

Aiming to investigate the mix design of eco-friendly UHPC with supplementary cementitious materials and coarser aggregates, we comprehensively studied the workability, microstructure, porosity, compressive strength, flexural strength, and Young’s modulus of UHPC. Relationship between compressive strength and Young’s modulus was obtained eventually. It is found that the compressive strength, flexural strength, and Young’s modulus of UHPC increase by 19.01%, 10.81%, and 5.99%, respectively, when 40 wt% cement is replaced with supplementary cementitious materials. The relationship between compressive strength and Young’s modulus of UHPC is an exponential form.

关键词： ultra-high perform ance concrete eco-friendly porosity compressive strength flexural strength Young’s modulus

Design and Synthesis of 1-Glycosyl-4-{N-[（2＇-morpholinethoxy）- phenyl] aminomethyl}- 1H- 1,2,3-triazoles as Calcium Activators

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Chemical Research in Chinese Universities 2015年第6期31卷 952-957页

作者： LI Yuxin DI fengjuan wang Duoyi CHEN Wei WAN Yingying LI Zhengming State Key Laboratory of Elemento-Organie Chemistry Institute of Elemento-Organic Chemistry Nankai University Tianjin 300071 P. R. China

A series of novel l-glycosyl-4-{N-[（2＇-morpholinethoxy）phenyl]aminomethyl}-1H-1,2,*** was designed and synthesized through a simple and efficient multistep synthetic method in good yields. The 1,2,3-triazole moiety acted as a single disubstituted ring and a linker between carbohydrates（D-glucose, D-galactose, maltose and lactose） and morpholine. The compounds were characterized by ^1H NMR, ^13C NMR and mass spectra（MS）. Two dif- ferent deprotection methods were discussed. The effects of compounds 5a, 5c and 6e on the intracellular calcium ion concentration（[Ca^2＋]i） in the central neurons of S. exigua were well investigated by calcium imaging technique. The results demonstrated that compound 6e could elevate the calcium concentration in the glial cells, not in the neurons.

关键词： Calcium channel Click chemistry Glial cell Glycosyl Triazole

Spontaneous hierarchical surface engineering of minerals through coupled dissolution-precipitation chemistry

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Aggregate 2024年第1期5卷 460-472页

作者： Jinyang Jiang Jiawen Zhang Lanxin wang Zeyu Lu fengjuan wang Zhiyong Liu Hongbo Zeng Jiangsu Key Laboratory of Construction Materials School of Materials Science and EngineeringSoutheast UniversityNanjingChinal 2Chemical and Materials EngineeringUniversity of AlbertaEdmontonAlbertaCanada

Peculiar hierarchical microstructures in creatures inspire modern material design with distinct *** can effortlessly construct sophisticated yet long-range ordered microstructure across bio-membrane through ion secretion and ***,microstructure biomimicry in current technology generally requires elaborate,point-by-point ***,a spontaneous yet controllable strategy is developed to achieve surface microstructure engineering through a natural surface phenomenon similar to ion secretion-precipitation,that is,coupled dissolution-precipitation.A series of hierarchical microstructures on mineral surfaces in fluids with tunable morphology,orientation,dimension,and spatial distribution are achieved by simply controlling initial dissolution and fluid *** seawater,long-range ordered film of vertically aligned brucite flakes forms through interfacial dissolution,nucleation,and confinement-induced orientation of flakes with vertically grown{110}plane,on the edge of which,fusiform aragonite epitaxially *** negligible initial surface dissolution,prismatic aragonite epitaxially grows on a calcite polyhedron-packed *** tuning fluid chemistry,closely packed calcite polyhedron and loosely packed calcite micro-pillars are engineered through rapid and retarded precipitation,***,the spontaneously grown microstructures resemble those deliberately created by human or found in nature,and tremendously modulate surface *** findings open new possibilities for facile and customizable engineering of microstructural surfaces,hierarchical heterostructures,and biomimetic materials.

关键词： directional crystallization dissolution-precipitation chemistry hierarchical microstructures spontaneous growth surface engineering

OVERCOMING TOGETHER ASEAN countries are working with China to fight the novel coronavirus epidemic

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中国东盟报道(英文版) 2020年第Z1期 48-49页

作者： wang fengjuan

The outbreak of illness caused by a novel coronavirus （COVID-19） has resulted in social panic and even some hard feelings against the Chinese people in some countries. Singaporean Prime Minister Lee Hsien Loong believes such reactions are stupid and illogical.'This epidemic is a problem to be addressed by all nations together,'declared Prime Minister Lee in a speech

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HANDS IN HANDS——THANLYIN： A BRIDGE TO TOMORROW CHINA MAKES RAPID PROGRESS IN BRIDGE BUILDING

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China Report ASEAN 2018年第12期3卷 34-37页

作者： wang fengjuan 不详

"The Chinese economy is not a pond,but an ocean,"declared Chinese President Xi Jinping at the opening ceremony of the first-ever China International Import Expo(CIIE)in Shanghai on November 5."Having experienced numer... 详细信息

关键词：改革开放中国文化合作发展现状

FRIENDSHIP ACROSS GENERATIONS:Recollection on Premier Zhou Enlai's bonds with Myanmar

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China Report ASEAN 2020年第8期5卷 52-55页

作者： wang fengjuan 不详

On a mid-summer afternoon,we met Madam Zhou Bingde,niece of late Premier Zhou Enlai,at h er apartment in downtown *** in her seventies,Zhou was welcoming with all smiles,courteously offering everyone a seat on the couch.

关键词： everyone offering Premier