检索结果-南通市图书馆

Porous Organic Polymer Nanoparticles for Sensing of Unsaturated Hydrocarbons

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2018年第6期34卷 1035-1040页

作者： LIU Zhi xu feifan ZHAO Zhijie HE Yuhua ZHANG Hongxing ZOU Guangtian LI Yangxue Key Lab of Groundwater Resources and Environment Ministry of Education Jilin University Changchun 130021 P. R. China State Key Laboratory of Superhard Mataterials Jilin University Changchun 130012 P. R. China International Joint Research Laboratory of Nano-micro Architecture Institute of Theoretical Chemistry Jilin University Changehun 130021 P. R. China

The design and synthesis of porous organic polymers for the potential application in chemical sensors remains a huge challenge nowadays. Herein, a porous organic polymer possessing tetrazole groups（TTZ-3） was synthe-sized via simple Schiff base chemical reaction. Thermogravimetric analysis（TGA）, Fourier transform infrared spec- trometer（FTIR）, solid-state 13C cross polarization/magic angle spinning nuclear magnetic resonance（CP/MAS NMR）, transmission electron microscopies（TEM） and field-scanning electron microscopies（FE-SEM） were adopted to cha- racterize the structure and morphology in detail. Significantly, the formed polymers exhibited special detection of unsaturated hydrocarbons through fluorescence enhancement based on photoactivatable 1,3-dipolar cycloaddition reactions. Furthermore, the reaction activity of different unsaturated hydrocarbons towards the polymers was investigated. This work highlights the great potential of porous organic polymers as chemical sensors in realizing environmental pollution monitoring and reducing the incidence of disease, such as chronic obstructive pulmonary disease.

关键词： Chronic obstructive pulmonary disease Porous organic polymer 1,3-Dipolar cycloaddition Air pollution Unsaturated hydrocarbons detection

Hot Mixing Behavior and Curing Process of Epoxy Asphalt

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2020年第3期35卷 605-610页

作者： LI Huawei WEI Wei ZHANG Chao xu feifan LI Xin JING Peng ZHU Quanyao DING Qingjun YAN Boxiang School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Department of Physics Changji UniversityChangji 831100China State Key Laboratory of Sil-icate Engineering Center Wuhan University of TechnologyWuhan 430070China

A new hot mixed epoxy asphalt system was developed. The reaction process of epoxy resin was characterized by Fourier transform infrared spectroscopy (FTIR). The viscosity was investigated by Brinell viscometer when epoxy resin was mixed with asphalt. The glass transition temperature (Tg), homogeneity, thermal stability and viscoelasticity of epoxy asphalt were analyzed by differential scanning calorimetry (DSC), metallographic microscope, thermogravimetric (TG) and dynamic mechanical analysis (DMA). The results showed that the viscosity of epoxy resin modified asphalt reached 1000 mPa·s for more than 180 minutes at 180 ℃, while the best construction process is mixing at 180 ℃ for 2 hours and curing at 60 ℃ for 4 days. The particle size of asphalt is less than 50 μm. In addition, the mechanical properties of the materials are uniform within the specified pavement thickness.

关键词： epoxy asphalt FTIR curing process viscosity dispersed

Regulation of interlayer channels of graphene oxide nanosheets in ultra-thin Pebax mixed-matrix membranes for CO_(2) capture

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第3期67卷 257-267页

作者： feifan Yang Yuanhang Jin Jiangying Liu Haipeng Zhu Rong xu Fenjuan Xiangli Gongping Liu Wanqin Jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Shandong Production and Research Long Membrane Technology Development Co. Ltd.Yantai Economic Development ZoneYantai 265505China

For the application of carbon capture by membrane process,it is crucial to develop a highly permeable CO_(2)-selective *** this work,we reported an ultra-thin polyether-block-amide(Pebax)mixedmatrix membranes(MMMs)incorporated by graphene oxide(GO),in which the interlayer channels were regulated to optimize the CO_(2)/N_(2) separation *** membrane preparation conditions were systematically investigated on the influence of the membrane structure and separation performance,including the lateral size of GO nanosheets,GO loading,thermal reduction temperature,and *** results demonstrated that the precisely regulated interlayer channel of GO nanosheets can rapidly provide CO_(2)-selective transport channels due to the synergetic effects of size sieving and preferential *** GO/Pebax ultra-thin MMMs exhibited CO_(2)/N_(2) selectivity of 72 and CO_(2) permeance of 400 GPU(1 GPU=106 cm^(3)(STP)·cm^(2)·s^(-1)·cmHg^(-1)),providing a promising candidate for CO_(2) capture.

关键词： Mixed-matrix membrane Ultra-thin membrane Pebax Graphene oxide CO_(2) capture

Characterization of cerebrovascular changes in Alzheimer's disease mice by photoacoustic imaging

在线全文

学校读者我要写书评

暂无评论

Journal of Innovative Optical Health Sciences 2024年第6期17卷 29-40页

作者： Xi Li Zhongyang Zhang Hua Shi feifan Zhou Key Laboratory of Biomedical Engineering of Hainan Province School of Biomedical Engineering Hainan University Sanya 572025P.R.China

The cerebral vasculature plays a significant role in the development of Alzheimer's disease(AD),however,the specific association between them remains *** this paper,based on the benefits of photoacoustic imaging(PAI),including label-free,high-resolution,in vivo imaging of vessels,we investigated the structural changes of cerebral vascular in wild-type(WT)mice and AD mice at different ages,analyzed the characteristics of the vascular in different brain regions,and correlated vascular characteristics with cognitive *** results showed that vascular density and vascular branching index in the cortical and frontal regions of both WT and AD mice decreased with ***,vascular lacunarity increased with age,and the changes in vascular structure were more pronounced in AD *** trend of vascular dysfunction aligns with the worsening cognitive dysfunction as the disease ***,we utilized in vivo PAI to analyze the changes in vascular structure during the progression of AD,elucidating the spatial and temporal correlation with cognitive impairment,which will provide more intuitive data for the study of the correlation between cerebrovascular and the development of AD.

关键词： Photoacoustic imaging Alzheimer's disease cerebrovascular vascular network cognitive impairment.

Performance Enhancement of Single-Phase Immersion Liquid-Cooled Data Center Servers

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2024年第5期33卷 1757-1772页

作者： GE Junlei XIA feifan ZHANG Chengbin HUANG Yongping School of Energy and Environment Southeast UniversityNanjing 210096China Wuhan Digital Engineering Research Institute Wuhan 430205China

As the promising cooling method for the next generation of data centers,the internal heat transport mechanism and enhancement mechanism of single-phase immersion liquid-cooled(SPILC)systems are not yet well *** address this,a steady-state three-dimensional numerical model is constructed herein to analyze flow and thermal transport capacities in servers using SPILC and traditional air-cooling ***,this paper emphasizes the influence of component positioning,and underscores the benefits of optimizing coolant flow distribution using *** results indicate that the SPILC system outperforms the traditional air-cooling approach at the same inlet Reynolds number(Re).When Re=10000,the SPILC method reduces the maximum temperature by up to 70.13%,increases the average convective heat transfer coefficient by287.5%,and provides better overall thermal uniformity in data center ***,placing devices downstream of high-power components creates"thermal barriers"and degrades thermal transport for upstream devices due to increased flow *** spacing between high-power devices can lead to the formation of bypass channels,further deteriorating heat ***,the addition of baffles in the inlet section of SPILC systems effectively enhances heat dissipation *** maximize the heat dissipation capacity,minimizing bypass channels and optimizing the flow distribution of coolants are crucial.

关键词： single-phase immersion liquid-cooled performance enhancement data center

High performance Ga N-based hybrid white micro-LEDs integrated with quantum-dots

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2020年第3期41卷 32-35页

作者： feifan xu xu Cen Bin Liu Danbei Wang Tao Tao Ting Zhi Qi Wang Zili Xie Yugang Zhou Youdou Zheng Rong Zhang Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210023China Nanjing National Laboratory of Microstructures Nanjing UniversityNanjing 210023China College of Electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023China Xiamen University Xiamen 316005China

Hybrid white micro-pillar structure light emitting diodes(LEDs)have been manufacture utilizing blue micro-LEDs arrays integrated with 580 nm CIS((CuInS2-ZnS)/ZnS)core/shell quantum *** fabricated hybrid white micro-LEDs have good electrical properties,which are manifested in relatively low turn-on voltage and reverse leakage ***-quality hybrid white light emission has been demonstrated by the hybrid white micro-LEDs after a systemic optimization,in which the corresponding color coordinates are calculated to be(0.3303,0.3501)and the calculated color temperature is 5596 *** result indicates an effective way to achieve high-performance white LEDs and shows great promise in a large range of applications in the future including micro-displays,bioinstrumentation and visible light communication.

关键词： GaN hybrid white micro-LEDs quantum dots

On the Polygonal Wear Evolution of Heavy-Haul Locomotive Wheels due to Wheel/Rail Flexibility and Its Mitigation Measures

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2024年第1期37卷 40-61页

作者： Yunfan Yang feifan Chai Pengfei Liu Liang Ling Kaiyun Wang Wanming Zhai State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu 610031China

Wheel polygonal wear can immensely worsen wheel/rail interactions and vibration performances of the train and track,and ultimately,lead to the shortening of service life of railway *** present,wheel/rail medium-or high-frequency frictional interactions are perceived as an essential reason of the high-order polygonal wear of railway wheels,which are potentially resulted by the flexible deformations of the train/track system or other external *** this work,the effect of wheel/rail flexibility on polygonal wear evolution of heavy-haul locomotive wheels is explored with aid of the long-term wheel polygonal wear evolution simulations,in which different flexible modeling of the heavy-haul wheel/rail coupled system is ***,the mitigation measures for the polygonal wear of heavy-haul locomotive wheels are *** results point out that the evolution of polygonal wear of heavy-haul locomotive wheels can be veritably simulated with consideration of the flexible effect of both wheelset and *** of mixed-line operation of heavy-haul trains and application of multicut wheel re-profiling can effectively reduce the development of wheel polygonal *** research can provide a deep-going understanding of polygonal wear evolution mechanism of heavy-haul locomotive wheels and its mitigation measures.

关键词： Heavy-haul locomotive Wheel polygonal wear Wheel/rail flexibility Long-term polygonal wear evolution Mitigation measures

Stimuli-responsive coordination polymers toward next-generation smart materials and devices

在线全文

学校读者我要写书评

暂无评论

eScience 2024年第3期4卷 1-31页

作者： feifan Lang Jiandong Pang Xian-He Bu School of Materials Science and Engineering Smart Sensing Interdisciplinary Science CenterTKL of Metal and Molecule-Based Material ChemistryCollaborative Innovation Center of Chemical Science and EngineeringNankai UniversityTianjin 300350China State Key Laboratory of Elemento-Organic Chemistry College of ChemistryNankai UniversityTianjin 300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China

Stimuli-responsive coordination polymers(CPs)are among one of the most prolific research areas in developing the next-generation functional *** capability of being accurately excited by particular external changes with pre-determined and observable/characterizable behaviors correspond,are the so called“stimuli”and“responsive”.Abundant types of CP compounds,especially metal-organic frameworks(MOFs),are of rocketing interest owing to their compositional diversity,structural tunability,and in essence their highly engineerable *** present review is aimed to sketch several common types of stimulation and the corresponding responses for CPs,accompanied with the broad logic and mechanisms *** further from the aspect of material revolution,some representative progresses together with the latest advances of CP-based materials in various fields are covered in attempt to display a broader picture towards the possible prospects of this topic.

关键词： Coordinationpolymers Metal-organicframeworks Stimuli-responsive Smart materials

Acculturation and translation:Modern architectural heritage of Zhongshan Park in Xiamen from typological perspective

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Architectural Research 2024年第3期13卷 613-624页

作者： xufang Li Xiangpin Zhou feifan Weng Fanzhuo Ding Zhenxin Yi Department of Landscape Architecture College of Architecture&Urban PlanningTongji UniversityShanghai 200092China Department of Landscape Architecture College of Landscape Architecture&ArtFujian Agriculture and Forestry UniversityFuzhou 350002China Academy of Art&Design Tsinghua UniversityBeijing 100084China Graduate School of Techno Design Kookmin UniversitySeoulRepublic of Korea

The modern architectural heritage is the core carrier of city’s historical inheritance and *** value is related to the spatial and temporal evolution of the urban landscape,along with the collective memory of society and transformation in public *** contradiction between high-speed urban construction and architectural heritage preservation has proliferated,and the problems of loss of heritage culture and fading of relics are very significant,but there is a lack of research on modern architectural *** study analysed indepth the artistic archetypes and evolutionary characteristics of the architecture of Zhongshan Park in Xiamen through field research and historical data collation,adopting the theory method of architectural ***,we analysed the architectural typology of Zhongshan Park in Xiamen and the process of acculturation and translation with foreign cultures,explored the motives of its formation and the cultural meanings of the public space embodied in *** on this,we proposed a sustainable development heritage approach for the modern architectural heritage of Zhongshan Park in *** results indicate that modern architectural art has inherited classical Chinese historical and cultural traditions and ideological *** unique characteristics reflect the spirit of the times and result from the gradual development of Western ***,it embodies a strong sense of national *** findings enrich the academic research on the cultural interaction between Chinese and Western architecture,offering valuable insights for the conservation and living heritage of modern architectural heritage in other regions.

关键词： Modern architectural heritage Acculturation translation Architectural typology Sun Yat-sen culture Xiamen Zhongshan Park