检索结果-南通市图书馆

Data driven reduced modeling for fluidized bed with immersed tubes based on PCA and Bi-LSTM neural networksAuthor links open overlay panel

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第8期91卷 1-18页

作者： Jiabin Fang Wenkai Cu Huang Liu Huixin Zhang Hanqing Liu Jinjia Wei Xiang Ma Nan Zheng school of Chemical Engineering and technology Xi'an Jiaotong UniversityXi'anShaanxi 710049China

The fast and accurate reduced-order modeling of fluidized beds is a challenging task in the field of fluid dynamics,owing to their high dimensionality and nonlinear dynamic *** this study,a nonintrusive reduced order modeling method,the reduced order model based on principal component analysis and bidirectional long short-term memory networks(PBLSTM ROM),was developed to capture complex spatio-temporal dynamics of fluidized *** combining principal component analysis and Bidirectional long-short-term memory networks,the PBLSTM ROM effectively extracted dynamic evolution information without any prior knowledge of governing equations,enabling reduced-order modeling of unsteady flow *** PBLSTM ROM was validated using the solid volume fraction and gas velocity flow fields of a fluidized bed with immersed tubes,showing superior performance over both the PLSTM and PANN ROMs in accurately capturing temporal changes in the fluidization fields,especially in the region near immersed tubes where severe fluctuations ***,the PBLSTM ROM improved the simulation speed by five orders of magnitude compared to traditional computational fluid dynamics *** findings suggest that the PBLSTM ROM presents a promising approach for analyzing the complex fluid flows in engineering practice.

关键词： Reduced order modeling Fluidized bed Deep learning Bi-LSTM

Exploring the Effect of Plasticity on the Phase Imaging of TM-AFM Through Molecular Dynamics Simulations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Solida Sinica 2024年第2期37卷 297-304页

作者： Guolin Liu Yu Zeng Yaxin Chen Zheng Wei school of Mechanical and Electrical Engineering Beijing University of Chemical TechnologyBeijing100029China

In the tapping-mode atomic force microscope(TM-AFM),the probe tip continuously taps the sample surface,which may cause plastic deformation of the sample and result in energy *** energy dissipation of the probe is closely related to the scanned phase *** quantify the energy dissipation due to plastic indentations of the sample,this study utilized a combination of molecular dynamics(MD)simulations and experiments on single-crystal copper samples,including multiple nano-indentation *** energy dissipation of the probe due to the plastic deformation of the sample was calculated by integrating the hysteresis curve of the indentation depth versus the force applied to the *** simulation results are in good agreement with the experimental *** sets of results have demonstrated that the plastic energy dissipation decreases as the number of indentations increases,and eventually the energy of the probe tends to *** equilibrium energy dissipation is associated with other dissipation ***,it was observed that,after hundreds of taps,the dissipated energy of plastic deformation could be ignored,implying that the scanned image may not reflect the plasticity information of the sample after multiple taps of the probe on the sample surface for scanning.

关键词： Atomic force microscopy Force-distance curves Nano-indentations Plasticity Molecular dynamics

Novel strategy of multidimensional information encryption via multi-color carbon dots aggregation-induced emission

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 Research 2024年第6期17卷 5680-5687页

作者： Liu Ding Xilang Jin Yuchong Gao Shouwang Kang Haiyan Bai Xuehao Ma Taotao Ai Hongwei Zhou Weixing Chen Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices Engineering Research Center of Light Stabilizers for Polymer Materials Universities of Shaanxi Province School of Materials and Chemical EngineeringXi’an Technological UniversityXi’an 710021China school of Material science and Engineering Shaanxi University of TechnologyHanzhong 723000China Department of Materials science and Engineering University of PennsylvaniaPhiladelphia 19104USA

Carbon dots(CDs)with aggregation-induced emission(AIE)have sparked significant interest in multidimensional anti-counterfeiting due to their exceptional fluorescence ***,the preparation of AIE CDs with multicolor solid-state fluorescence remains a formidable challenge due to its complicated *** the present work,a novel class of multicolor AIE CDs(M-CDs)were fabricated using selected precursor(salicylic acid,thiosalicylic acid,and 2,2'-dithiodibenzoic acid),with an eco-friendly,low-cost one-pot solvothermal *** the dilute organic solution,M-CDs manifested blue emission,but upon aggregation in the presence of water,the red,yellow,green,and blue emissions were displayed due to the AIE *** analysis,coupled with theoretical calculations,revealed that the increase in the size of sp2 domains would lower the Eg and cause a red-shift emission ***,the continuous emission of M-CDs from blue to red can be utilized as ink for multimode printing,enabling the creation of a variety of school badges and quick response *** findings hold promising implications for multi-information encryption applications.

关键词： aggregation-induced emission(AIE) luminescence mechanism multi-color emission information encryption.

China's 100 Technical Achievements Teenagers Should Know

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Book International 2024年第2期 120-121页

作者： Ben De Chinese Academy of Engineering school of Electronic and information Engineering of Nanjing University of Aeronautics and Astronautics Jinling University of science and technology

*** De,an academician of the Chinese Academy of Engineering,selected 100 essential achievements in the field of science and technology in *** book fully demonstrates the scientifc and technological progress of contemporary *** each scientific and technical achievement,relevant professional authors were invited to *** by professional illustrations,this book vividly shows the science and technology of the country to young readers.

关键词： illustration professional contemporary

Visibility restoration for real-world hazy images via improved physical model and Gaussian total variation

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer science 2024年第1期18卷 267-269页

作者： Chuan LI Enping HU Xinyu ZHANG Hao ZHOU Hailing XIONG Yun LIU College of Computer and information science Southwest UniversityChongqing 400715China school of Big Data and Intelligent Engineering Chongqing College of International Business and EconomicsChongqing 401520China College of Artificial Intelligence Southwest UniversityChongqing 400715China College of Electronic and information Engineering Southwest UniversityChongqing 400715China

1 Introduction Under real-world haze conditions,the existence of haze particles in the atmosphere reduces the visibility of captured ***,the noise is inevitably introduced into the degraded image,which further deteriorates the visual quality of the *** enhance the visibility and quality of outdoor real-world hazy images,numerous algorithms have been proposed to remove haze from a single input *** existing methods are broadly lumped into two categories:prior-based methods[1,2]and learning-based methods[3–6].Unfortunately,the widely used atmospheric scattering model and the corresponding haze removal methods fail to take the noise interference into account,which may result in poor visibility restoration performance.

关键词： visibility remove noise

Interface optimization and defects suppression via Na F introduction enable efficient flexible Sb_(2)Se_(3) thin-film solar cells

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 Energy Chemistry 2024年第3期90卷 165-175,I0006页

作者： Mingdong Chen Muhammad Ishaq Donglou Ren Hongli Ma Zhenghua Su Ping Fan David Le Coq Xianghua Zhang Guangxing Liang Shuo Chen Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004GuangxiChina CNRS ISCR(Institut des Sciences Chimiques de Rennes)UMR 6226Universitéde RennesRennes F-35000France

Sb_(2)Se_(3) with unique one-dimensional(1D) crystal structure exhibits exceptional deformation tolerance,demonstrating great application potential in flexible ***,the power conversion efficiency(PCE) of flexible Sb_(2)Se_(3) photovoltaic devices is temporarily limited by the complicated intrinsic defects and the undesirable contact ***,a high-quality Sb_(2)Se_(3) absorber layer with large crystal grains and benign [hkl] growth orientation can be first prepared on a Mo foil *** NaF intermediate layer is introduced between Mo and Sb_(2)Se_(3),which can further optimize the growth of Sb_(2)Se_(3)thin ***,positive Na ion diffusion enables it to dramatically lower barrier height at the back contact interface and passivate harmful defects at both bulk and *** a result,the champion substrate structured Mo-foil/Mo/NaF/Sb_(2)Se_(3)/CdS/ITO/Ag flexible thin-film solar cell delivers an obviously higher efficiency of 8.03% and a record open-circuit voltage(V_(OC)) of 0.492 *** flexible Sb_(2)Se_(3) device also exhibits excellent stability and flexibility to stand large bending radius and multiple bending times,as well as superior weak light photo-response with derived efficiency of 12.60%.This work presents an effective strategy to enhance the flexible Sb_(2)Se_(3) device performance and expand its potential photovoltaic applications.

关键词： Sb_(2)Se_(3) Flexible solar cells NaF intermediate layer Interface optimization Defects suppression

Investigation of Adhesive Perception Based on Friction and Brain Activation

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2024年第4期21卷 1862-1877页

作者： Xingxing Fang Wei Tang Shousheng Zhang Tengfei Zhuang school of Mechatronic Engineering China University of Mining and TechnologyXuzhou221116JiangsuChina

The enhancement of adhesive perception is crucial to maintaining a stable and comfortable grip of the skin-touch *** study the tactile perception of adhesive surfaces,subjective evaluation,skin friction and vibrations,and neurophysiological response of the brain activity were investigated *** materials,which are commonly used for bionic materials and skin-touch products,were chosen for the tactile *** results showed that with the increasing of surface adhesion,the dominant friction transferred from a combination of adhesive friction and deformation friction to adhesive *** friction coefficient and vibration amplitude had strong correlations with the perceived adhesion of *** parietal lobe and occipital lobe were involved in adhesive perceptions,and the area and intensity of brain activation increased with the increasing surface *** with larger adhesion tended to excite a high P300 amplitude and short latency,indicating that the judgment was faster and that more attentional resources were involved in adhesive ***,the electroencephalograph signals of the adhesive perception were simulated by the neural mass *** demonstrated that the excitability and intensity of brain activity,and the connectivity strength between two neural masses increased with the increasing surface *** study is meaningful to understand the role of surface adhesion in tactile friction and the cognitive mechanism in adhesive perception to improve the tactile experience of adhesive materials.

关键词： Surface adhesion Tactile perception Friction Brain activation Neural mass model

Excessive manure application stimulates nitrogen cycling but only weakly promotes crop yields in an acidic Ultisol:Results from a 20-year field experiment

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 Integrative Agriculture 2024年第7期23卷 2434-2445页

作者： Song Wan Yongxin Lin Hangwei Hu Milin Deng Jianbo Fan Jizheng He Key Laboratory for Humid Subtropical Eco-geographical Processes of Ministry of Education School of Geographical Sciences/School of Carbon Neutrality Future TechnologyFujian Normal UniversityFuzhou 350007China school of Agriculture and Food Faculty of ScienceThe University of MelbourneParkvilleVictoria 3010Australia State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China

Population growth and growing demand for livestock products produce large amounts of manure,which can be harnessed to maintain soil sustainability and crop ***,the impacts of excessive manure application on crop yields,nitrogen(N)-cycling processes and microorganisms remain ***,we explored the effects of 20-year of excessive rates(18 and 27 Mg ha^(–1)yr^(–1))of pig manure application on peanut crop yields,soil nutrient contents,N-cycling processes and the abundance of N-cycling microorganisms in an acidic Ultisol in summer and winter,compared with none and a regular rate(9 Mg ha^(–1)yr^(–1))of pig manure ***-term excessive pig manure application,especially at the high-rate,significantly increased soil nutrient contents,the abundance of N-cycling functional genes,potential nitrification and denitrification activity,while it had a weaker effect on peanut yield and plant *** with manure application,seasonality had a much weaker effect on N-cycling gene *** forest analysis showed that available phosphorus(AP)content was the primary predictor for N-cycling gene abundance,with significant and positive associations with all tested N-cycling *** study clearly illustrated that excessive manure application would increase N-cycling gene abundance and potential N loss with relatively weak promotion of crop yields,providing significant implications for sustainable agriculture in the acidic Ultisols.

关键词： denitrification manure amendment nitrification N-cycling functional genes peanut yields

在线全文

学校读者我要写书评

暂无评论

双功能添加剂策略制备高效钙钛矿太阳电池

science China Materials 2024年第8期67卷 2628-2636页

作者：吴炯桦杭陈旺王仁杰郑巧邓辉张彩霞王伟煌李冬梅李一明程树英 College of Physics and information Engineering Institute of Micro-Nano Devices and Solar CellsFuzhou UniversityFuzhou 350108China Fujian science&technology Innovation Laboratory for optoelectronic information of China Fuzhou 350108China Jiangsu Collaborative Innovation Center of Photovoltaic science and Engineering Changzhou 213164China Key Laboratory for Renewable Energy Chinese Academy of sciences Beijing Key Laboratory for New Energy Materials and DevicesInstitute of PhysicsChinese Academy of SciencesBeijing 100190China

目前针对提高钙钛矿太阳能电池(PSCs)效率的研究发展迅速,效率已经达到26%.然而,在制备高效率PSCs时经常会使用过量PbI_(2),过量的PbI_(2)会导致电池的稳定性缺陷.为了解决这一问题,我们引入了阴阳离子共同作用的双功能添加剂苯乙胺三... 详细信息

目前针对提高钙钛矿太阳能电池(PSCs)效率的研究发展迅速,效率已经达到26%.然而,在制备高效率PSCs时经常会使用过量PbI_(2),过量的PbI_(2)会导致电池的稳定性缺陷.为了解决这一问题,我们引入了阴阳离子共同作用的双功能添加剂苯乙胺三氟乙酸盐(PEATFA),来钝化钙钛矿薄膜中的缺陷和过量的PbI_(2),以协同钝化钙钛矿太阳能电池.PEA^(+)阳离子促进二维钙钛矿生成,而TFA^(-)阴离子钝化未配位的Pb_(2+)离子和碘空位,从而提高了钙钛矿晶体质量.此外,PEATFA的引入优化了钙钛矿与空穴传输层之间的能级匹配,从而提高了其电荷传输和抽取能力.最终,我们成功实现了PSCs 24.05%的光电转换效率,同时PSCs表现出最小的滞后现象和良好的稳定性.

关键词：钙钛矿太阳能电池光电转换效率钙钛矿太阳电池功能添加剂滞后现象钙钛矿薄膜晶体质量能级匹配