检索结果-南通市图书馆

Salt/current-triggered stabilization of β-cyclodextrins encapsulated host-guest low-molecular-weight gels

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第2期31卷 369-372页

作者： Huan Xu chaoyu zhou Chuanjiang Jian Sunhai Yang Miaochang Liu Xiaobo Huang Wenxia Gao Huayue Wu College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325027China

Host-guest supramolecular gels were developed via the self-assembly of inclusion complexes(ICs) ofβ-cyclodextrins/phenylboronic acid gelator(PBA).Salts and current were involved in the self-assembly to stabilize the host-guest *** stability of the gels was greatly improved after salts were *** stable time of gels was extended from 2.5 h to 120 h with the addition of NH_4 NO_3 at the concentration of 2.5×10^(-2) g/*** morphology of the gel was affected by the concentrations of NH_4NO_*** images revealed that the gels were three-dimensional nanofibrous networks,the sizes of fibers decreased with decreasing NH_4NO_3 concentrations,which affected the stability of gels,further proved by the rheological properties of *** stable gels were obtained with current stimulation,the stable time of the gel was increased from 2.5 h to 55 h with current by adding NaBF_*** current also exhibited significant influence on the aggregation as the voltage varied(0-500 mV) with a constant concentration of *** result showed the self-assembly process of host-guest gel could be well controlled via the addition of salts and current to desired morphology and stability.

关键词： Supramolecular gel Inclusion complex Host-guest interaction Salt Current Stability

Sparse Reconstructive Evidential Clustering for Multi-View Data

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 459-473页

作者： chaoyu Gong Yang You School of Computing National University of SingaporeSingapore

Although many multi-view clustering(MVC) algorithms with acceptable performances have been presented, to the best of our knowledge, nearly all of them need to be fed with the correct number of clusters. In addition, these existing algorithms create only the hard and fuzzy partitions for multi-view objects,which are often located in highly-overlapping areas of multi-view feature space. The adoption of hard and fuzzy partition ignores the ambiguity and uncertainty in the assignment of objects, likely leading to performance degradation. To address these issues, we propose a novel sparse reconstructive multi-view evidential clustering algorithm(SRMVEC). Based on a sparse reconstructive procedure, SRMVEC learns a shared affinity matrix across views, and maps multi-view objects to a 2-dimensional humanreadable chart by calculating 2 newly defined mathematical metrics for each object. From this chart, users can detect the number of clusters and select several objects existing in the dataset as cluster centers. Then, SRMVEC derives a credal partition under the framework of evidence theory, improving the fault tolerance of clustering. Ablation studies show the benefits of adopting the sparse reconstructive procedure and evidence theory. Besides,SRMVEC delivers effectiveness on benchmark datasets by outperforming some state-of-the-art methods.

关键词： Evidence theory multi-view clustering(MVC) optimization sparse reconstruction

Catalytic transformation of 4-nitrophenol into 4-aminophenol over ZnO nanowire array-decorated Cu nanoparticles

在线全文

学校读者我要写书评

暂无评论

Green Chemical Engineering 2024年第2期5卷 205-212页

作者： Anlin Feng chaoyu Lin Huiqin zhou Weihong Jin Yidong Hu Dongyang Li Qingyang Li Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou510632China School of Chemical Engineering and Technology Hebei University of TechnologyTianjin300401China Department of Chemical and Materials Engineering University of AlbertaEdmontonT6G 2H5Canada

To realize economical and effective removal of hazardous 4-nitrophenol from the environment,we developed an easily recyclable ZnO nanowire array decorated with Cu *** salix argyracea-shaped structure not only provides a platform to achieve stable and good dispersion of Cu nanoparticles,but also offers a great deal of catalytically active *** density functional theory calculations reveal that ZnO and Cu have a very beneficial synergistic effect on their catalytic *** synergy is ascribed to the electronic localization occurring at ZnO/Cu interface,which helps improve Cu nanoparticle’s ability to adsorb electro-negatively 4-nitrophenolate ions and to capture hydrogen radicals,thereby accelerating the hydrogen transfer from metal hydride complex to *** from these characteristics,it exhibits high efficiency and reusability towards the catalytic reduction of waste 4-nitrophenol to valuable 4-aminophenol with a rate constant of 43.02×10^(-3)s^(-1)and an average conversion of 96.5%in 90 s during 10 *** activity is superior to that of most reported noble-or non-noble-metal powder,bulk,coating,and array catalysts,indicating its competitive advantages in cost and efficiency,as well as enticing application prospects.

关键词： ZnO nanowire Cu nanoparticle Nano-heterojunction 4-Nitrophenol catalytic reduction Density functional theory

Deciphering the high-carbonization-temperature triggered enzymatic activity of wool-derived N,S-co-doped carbon nanosheets

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第3期35卷 182-188页

作者： Jiachen Zhao Deshuai Yu Jianmin Chen Shihao Lin Yonghua Tang chaoyu Fan Dongfang zhou Youhui Lin Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchXiamen UniversityXiamen 361005China School of Pharmacy and Medical Technology Putian UniversityPutian 351100China Key Laboratory of Mental Health of the Ministry of Education NMPA Key Laboratory for Research and Evaluation of Drug Metabolism&Guangdong Provincial Key Laboratory of New Drug ScreeningSchool of Pharmaceutical SciencesSouthern Medical UniversityGuangzhou 510515China Key Laboratory of Pharmaceutical Analysis and Laboratory Medicine(Putian University) Fujian Province UniversityPutian 351100China

It is well-established that high carbonization temperature will trigger the enzyme-like activity of carbon-based ***,the catalytic mechanism is still ambiguous,which hinders the further rational design of nanomaterials as enzyme ***,N,S-rich carbonized wool nanosheets(CWs)were synthesized at different pyrolysis *** expected,only CWs treated with high-temperature possess intrinsic oxidase-and peroxidase-like ***,density functional theory(DFT)calculations demonstrate that graphitic nitrogen and the co-existence of nitrogen and sulfur in the carbon matrix serve as the active sites for the enzyme-like *** importantly,combining theoretical calculations and experimental observations,the high-temperature triggered catalytic mechanism can be ascribed to the fact that an appropriate high-temperature maximizes the graphitization degree to a certain extent,at which most of the catalytic active sites are well retained rather than ***,coupling with excellent photothermal conversion efficiency and catalytic performance,CWs can be applied to photothermal-catalytic cancer therapy under near-infrared region(NIR)light *** believe this work will contribute to understanding the catalytic mechanism of carbon-based nanozymes and promote the development of new biomedical and pharmaceutical applications.

关键词： Carbon-based nanozyme Catalytic mechanism Density functional theory High-temperature carbonization

Micro-flow structure at regime transition from bubbling to turbulent fluidization in a fluidized bed

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第6期89卷 117-130页

作者： chaoyu Yan Yue Yuan Xiaoyang Wei Jesse Zhu State Key Laboratory of Heavy Oil Processing Beijing Key Laboratory of Process Fluid Filtration and SeparationCollege of Mechanical and Transportation EngineeringChina University of PetroleumBeijing 102249China China Beacons Institute The University of NottinghamNingbo315100China Department of Chemical and Biochemical Engineering University of Western OntarioLondonOntarioN6A 5B9Canada

Gas-solid fluidized beds have found extensive utilization in frontline manufacturing,in particular as low-velocity *** fluidization status,the bubbling or turbulent flow regime and the transition in between,determine the system performance in practical *** the convoluted hydrodynamics are quantitively evaluated through numerous data-processing methodologies,none of them alone can reflect all the critical information to identify the transition from the bubbling to the turbulent ***,this study was to exploit a coupling data processing methodology,in the combination of standard deviation,power spectrum density,probability density function,wavelet transform,and wavelet multiresolution method,to jointly explain the micro-flow structure at the regime transition from bubbling to turbulent *** transient differential pressure fluctuation was measured for the evaluation in a fluidized bed(0.267 m i.d.×2.5 m height)with FCC catalysts(d_(p)=65μm,ρ_(p)=1780kg/m^(3))at different superficial gas velocities(0.02–1.4 m/s).The results show that the onset of turbulent fluidization starts earlier in the top section of the bed than in the bottom *** wavelet decomposition displays that the fluctuation of differential pressure mainly concentrates on the sub-signals with an intermediate frequency *** sub-signals could be synthesized into three types of scales(micro-scale,meso-scale,and macro-scale),representing the multi-scale hydrodynamics in the fluidized *** micro-scale signal has the characteristic information of bubbling fluidization,and the characteristic information of turbulent fluidization is mainly represented by the meso-scale *** work provides a systematic comprehension of fluidization status assessment and serves as an impetus for more coupling analysis in this sector.

关键词： Flow regime transition Bubbling fluidization Turbulent fluidization Micro-flow structure Differential pressure fluctuation

Microfluidics-derived microfibers in flexible bioelectronics

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

Materials Futures 2024年第3期3卷 54-70页

作者： chaoyu Yang Xingyu Hou Li Zhang Department of Mechanical and Automation Engineering The Chinese University of Hong KongShatinN.T.Hong Kong Special Administrative Region of China 999077People’s Republic of China

Flexible electronics have attracted extensive attention across a wide range of fields due to their potential for preventive medicine and early disease ***-based textiles,encountered in everyday life,have emerged as promising platforms with integrated sensing *** technology has been recognized as a promising avenue for the development of flexible conductive microfibers and has made significant *** this review,we provide a comprehensive overview of the state-of-the-art advancements in microfiber-based flexible electronics fabricated using microfluidic ***,the fundamental strategies of the microfluidic fabrication of conductive microfibers with different structures and morphologies are ***,attention is then directed towards the diverse applications of these microfibers in ***,we offer a forwardlooking perspective on the future challenges about microfluidic-derived microfibers in flexible bioelectronics.

关键词： microfluidics conductive microfibers sensing flexible bioelectronics

Proton‑Prompted Ligand Exchange to Achieve High‑Efficiency CsPbI_(3) Quantum Dot Light‑Emitting Diodes

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

Nano-Micro Letters 2024年第6期16卷 53-62页

作者： Yanming Li Ming Deng Xuanyu Zhang Lei Qian chaoyu Xiang Laboratory of Advanced Nano‑Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315300People’s Republic of China Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211ZhejiangPeople’s Republic of China University of Nottingham Ningbo China Ningbo 315100People’s Republic of China

CsPbI_(3)perovskite quantum dots(QDs)are ideal materials for the next generation of red light-emitting ***,the low phase stability of CsPbI_(3)QDs and long-chain insulating capping ligands hinder the improvement of device *** in-situ ligand replacement and ligand exchange after synthesis were often difficult to ***,we proposed a new ligand exchange strategy using a proton-prompted insitu exchange of short 5-aminopentanoic acid ligands with long-chain oleic acid and oleylamine ligands to obtain stable small-size CsPbI_(3)*** exchange strategy maintained the size and morphology of CsPbI_(3)QDs and improved the optical properties and the conductivity of CsPbI_(3)QDs *** a result,high-efficiency red QD-based light-emitting diodes with an emission wavelength of 645 nm demonstrated a record maximum external quantum efficiency of 24.45%and an operational half-life of 10.79 h.

关键词： CsPbI_(3) perovskite quantum dots Light-emitting diodes Ligand exchange Proton-prompted in-situ exchange

CWGAN-GP with residual network model for lithium-ion battery thermal image data expansion with quantitative metrics

在线全文

学校读者我要写书评

暂无评论

Energy and AI 2024年第2期16卷 14-23页

作者： Fengshuo Hu chaoyu Dong Luyu Tian Yunfei Mu Xiaodan Yu Hongjie Jia School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China Agency for Science Technology and ResearchNanyang Technological University639798Singapore

Lithium batteries find extensive applications in energy *** is a crucial indicator for assessing the state of lithium-ion batteries,and numerous experiments require thermal images of lithium-ion batteries for research ***,acquiring thermal imaging samples of lithium-ion battery faults is challenging due to factors such as high experimental costs and associated *** address this,our study proposes the utilization of a Conditional Wasserstein Generative Adversarial Network with Gradient Penalty and Residual Network(CWGAN-GP with Residual Network)to augment the dataset of thermal images depicting lithium-ion battery *** employ various evaluation metrics to quantitatively analyze and compare the generated thermal images of lithium-ion ***,the expanded dataset,comprising four types of thermal images depicting lithium-ion battery faults,is input into a Mask Region-based Convolutional Neural Network for *** results demonstrate that the proposed model surpasses both traditional Generative Adversarial Network and Wasserstein Generative Adversarial Network in terms of the quality of generated thermal images of lithium-ion ***,the augmentation of the dataset leads to an improvement in the fault diagnosis accuracy of the Mask Region-based Convolutional Neural Network.

关键词： Lithium-ion batteries Generative adversarial network CWGAN-GP

晚清山西商人与河北棉花贸易研究——以商业文书为中心

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

河北经贸大学学报 2022年第1期43卷 90-101页

作者：晏雪莲周超宇山西大学历史文化学院山西太原030006

清朝晚期,河北棉产区形成产地市场与中转集散市场两级市场体系,通过与外省棉花消费市场相连接,河北棉花得以大量外运。外运路线分东西南北四条,囊括华北大部以及西北、华中部分地区。山西花商在棉产地与消费市场广设花店,并凭托由制度... 详细信息

清朝晚期,河北棉产区形成产地市场与中转集散市场两级市场体系,通过与外省棉花消费市场相连接,河北棉花得以大量外运。外运路线分东西南北四条,囊括华北大部以及西北、华中部分地区。山西花商在棉产地与消费市场广设花店,并凭托由制度化的书信经营形成的信息网络和以资金融通、清算为内容的金融体系,构建了完整的棉花贸易体系,实现购销一体化。山西花商也因此成为晚清河北棉花贸易发展的重要内生性因素。河北棉花西运山西,成本由花价、脚费、包装费用、厘金、官税、店用与打用钱(银)等部分构成。在棉花贸易过程中,因各地棉平与货币不同,棉花运往目的地后需对货币和重量进行换算;与其他商品不同,棉花价格以重量表示,花商利润主要来源于棉花在买进卖出时计费重量之差。

关键词：晚清晋商史料集成河北棉花市场山西商人贸易体系

维普期刊数据库博看期刊