检索结果-南通市图书馆

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

新媒体时代高校教师媒介素养提升探索

成才之路 2024年第11期 49-52页

作者：王同明吴晓光衡水学院文学与传播学院河北衡水053000

信息技术的日益普及和社交媒体的兴起使得信息传播更加广泛且迅速,这对高校教育提出了新的要求。媒介素养的提升成为高校教师适应信息化教学环境的必然需求,有助于高校教师更好地利用新媒体工具开展教学与育人工作。媒介素养不仅包括对... 详细信息

信息技术的日益普及和社交媒体的兴起使得信息传播更加广泛且迅速,这对高校教育提出了新的要求。媒介素养的提升成为高校教师适应信息化教学环境的必然需求,有助于高校教师更好地利用新媒体工具开展教学与育人工作。媒介素养不仅包括对媒体工具的熟练运用,更强调对信息的批判性思考、伦理道德的把控和媒介素材的创造性整合。高校教师应始终保持学习状态,形成良好的媒介传播意识,转变教学理念,充分利用新媒体技术创新教学方法,推动高等教育向更开放、灵活、创新的方向发展,进而提高育人质量。

关键词：新媒体高校教师媒介素养提升构成要素

同方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

无人机拍摄在衡水湖环境素材采集中的应用

衡水学院学报 2024年第1期26卷 1-4页

作者：邹捷王同明耿博超王立明孟令辉衡水学院文学与传播学院河北衡水053000 衡水学院现代教育技术管理中心河北衡水053000 衡水学院电子信息工程学院河北衡水053000

随着科技的快速发展,无人机应用于素材拍摄逐渐成为趋势。采用无人机拍摄衡水湖周边水体、静态植物、鸟类、人文景观等影像具有一定的优势。对水体的拍摄,可以深入了解衡水湖水质的动态变化和水体中污染物的浓度;对静态植物的拍摄,有助... 详细信息

随着科技的快速发展,无人机应用于素材拍摄逐渐成为趋势。采用无人机拍摄衡水湖周边水体、静态植物、鸟类、人文景观等影像具有一定的优势。对水体的拍摄,可以深入了解衡水湖水质的动态变化和水体中污染物的浓度;对静态植物的拍摄,有助于追踪湖泊周边地区生态系统的健康状态,并检测植被覆盖率的变化;对鸟类的拍摄,有助于记录鸟类的迁徙、繁殖和栖息地使用的情况;对人文景观的拍摄,可以为城市规划和可持续发展提供珍贵文化遗产的可视化证据。

关键词：无人机拍摄衡水湖素材采集

A refined deviatoric hardening plastic model for sand

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2813-2821页

作者： Min wang tongming Qu Yuntian Feng Teng Liang Liangtong Zhan MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Zhejiang UniversityHangzhou310058China Department of Civil and Environmental Engineering Hong Kong University of Science and TechnologyKowloon999077Hong KongChina Zienkiewicz Centre for Computational Engineering College of EngineeringSwansea UniversitySwanseaWalesSA18EPUK Center for Hypergravity Experimental and Interdisciplinary Research Zhejiang UniversityHangzhou310058China

The classical deviatoric hardening models are capable of characterizing the mechanical response of granular materials for a broad range of degrees of *** work finds that it has limitations in accurately predicting the volumetric deformation characteristics under a wide range of confining/consolidation *** issue stems from the pressure independent hardening law in the classical deviatoric hardening *** overcome this problem,we propose a refined deviatoric hardening model in which a pressure-dependent hardening law is developed based on experimental *** between numerical results and laboratory triaxial tests indicate that the improved model succeeds in capturing the volumetric deformation behavior under various confining/consolidation pressure conditions for both dense and loose ***,to examine the importance of the improved deviatoric hardening model,it is combined with the bounding surface plasticity theory to investigate the mechanical response of loose sand under complex cyclic loadings and different initial consolidation *** is proved that the proposed pressure-dependent deviatoric hardening law is capable of predicting the volumetric deformation characteristics to a satisfactory degree and plays an important role in the simulation of complex deformations for granular geomaterials.

关键词： Elasto-plastic deformation Isotropic hardening Deviatoric plastic strain Granular material Kinematic hardening Bounding surface

Experimental study on workability and permeability of sandy soils conditioned with thickened foam

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 Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 532-544页

作者： Zhiyao Feng Shuying wang tongming Qu Xiangcou Zheng Fanlin Ling School of Civil Engineering Central South UniversityChangsha410075China Tunnel and Underground Engineering Research Center Central South UniversityChangsha410075China Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyClearwater BayKowloon999077Hong KongChina Geo-Engineering Section Delft University of TechnologyDelft999025Netherlands

Water spewing and muck plugging often occur during earth pressure balance(EPB)shield machines tunnelling in water-rich sandy strata,even though the conventional foam has been employed to condition sandy *** this study,a novel thickened foaming agent suitable for EPB shield tunnelling in water-rich sandy strata is *** contrast to conventional foam-conditioned sands,the thickened foam-conditioned sand has a low permeability due to the consistent filling of soil pores with the thickened foam,and the initial permeability coefficient decreases by approximately two orders of *** also exhibits a suitable workability,which is attributed to the enhanced capability of the thickened foam to condition sandy *** addition,the effect of concentration on the stability of the foam is explained by the Gibbs-Marangoni effect,and conditioning mechanisms for the thickened foam on sands are discussed from the evolution of foam bubbles.

关键词： Earth pressure balance(EPB)shield Thickened foam Foam-conditioned sand Permeability Workability

Multi-layer perceptron-based data-driven multiscale modelling of granular materials with a novel Frobenius norm-based internal variable

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 Rock Mechanics and Geotechnical Engineering 2024年第6期16卷 2198-2218页

作者： Mengqi wang Y.T.Feng Shaoheng Guan tongming Qu Zienkiewicz Centre for Computational Engineering Faculty of Science and EngineeringSwansea UniversitySwanseaWalesSA18EPUK Institute of Theoretical and Computational Physics Graz University of TechnologyGraz8010Austria Department of Civil and Environmental Engineering Hong Kong University of Science and TechnologyClearwater BayKowloonHong KongChina

One objective of developing machine learning(ML)-based material models is to integrate them with well-established numerical methods to solve boundary value problems(BVPs).In the family of ML models,recurrent neural networks(RNNs)have been extensively applied to capture history-dependent constitutive responses of granular materials,but these multiple-step-based neural networks are neither sufficiently efficient nor aligned with the standard finite element method(FEM).Single-step-based neural networks like the multi-layer perceptron(MLP)are an alternative to bypass the above issues but have to introduce some internal variables to encode complex loading *** this work,one novel Frobenius norm-based internal variable,together with the Fourier layer and residual architectureenhanced MLP model,is crafted to replicate the history-dependent constitutive features of representative volume element(RVE)for granular *** obtained ML models are then seamlessly embedded into the FEM to solve the BVP of a biaxial compression case and a rigid strip footing *** obtained solutions are comparable to results from the FEM-DEM multiscale modelling but achieve significantly improved *** results demonstrate the applicability of the proposed internal variable in enabling MLP to capture highly nonlinear constitutive responses of granular materials.

关键词： Granular materials History-dependence Multi-layer perceptron(MLP) Discrete element method FEM-DEM Machine learning

Excellent strength-ductility combination of Cr_(26)Mn_(20)Fe_(20)Co20Ni_(14) high-entropy alloy at cryogenic temperatures

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 Materials Science & Technology 2023年第23期154卷 166-177页

作者： Xuzhou Gao Wei Jiang Yiping Lu Zhigang Ding Jizi Liu Wei Liu Gang Sha tongming wang Tingju Li Isaac T.H.Chang Yonghao Zhao Nano and Heterogeneous Materials Center School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province) School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China Herbert Gleiter Institute of Nanoscience Nanjing University of Science and Technology Nanjing 210094 China Metallurgy and Head of Liquid Metal Engineering (LiME) Doctoral Training Centre Brunel Centre for Advanced Solidification Technology (BCAST) Brunel University London Uxbridge UB8 3PH UK

In the present study,a face-centered cubic non-equiatomic Cr_(26)Mn_(20)Fe_(20)Co20Ni_(14) high-entropy alloy(HEA)with a low stacking fault energy of 17.6 mJ m^(−2) was prepared by vacuum induction melting,forging and annealing *** recrystallized sample is revealed to exhibit an excellent combination of strength and ductility over a wide temperature range of 4.2–293 *** decreasing temperature from 293 to 77 K,the ductility and ultimate tensile strength(UTS)gradually increase by 30% to 95% and 137% to 1020 MPa,*** the lowest temperature of 4.2 K,the ductility keeps 65% and the UTS increases by 200% to 1300 MPa,which exceed those published in the literature,including conventional 300 series stainless *** microstructural analyses of this alloy reveal a change of deformation mechanisms from dislocation slip and nano-twinning at 293 K to nano-phase transformation at 4.2 *** cooperation and competition of multiple nano-twinning and nano-phase transformation are responsible for the superior tensile properties at cryogenic *** study provides experimental evidence for potential cryogenic applications of HEAs.

关键词： High-entropy alloys Strength and ductility Cryogenic temperature Twinning Phase transformation

磁共振3 D-pCASL成像技术在急性缺血性脑卒中临床诊断中的应用价值

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

辽宁医学杂志 2024年第4期38卷 16-18页

作者：李倩王同明刘新爱胡明辉杨达易慧洋河南省中医院(河南中医药大学第二附属医院) 河南郑州450002

目的研究在急性缺血性脑卒中患者临床诊断中应用磁共振3D-pCASL成像技术起到的作用。方法选取2021年10月至2022年10月期间在本院收治的50例急性缺血性脑卒中患者为观察对象,50例患者均进行常规磁共振检查和磁共振3D-pCASL检查,检查后通... 详细信息

目的研究在急性缺血性脑卒中患者临床诊断中应用磁共振3D-pCASL成像技术起到的作用。方法选取2021年10月至2022年10月期间在本院收治的50例急性缺血性脑卒中患者为观察对象,50例患者均进行常规磁共振检查和磁共振3D-pCASL检查,检查后通过对患者基本资料分析了解不同检查方式的效能。结果磁共振3D-pCASL检查方式应用中诊断符合率为98%,高于常规磁共振检查方式诊断率92%。结论在急性缺血性脑卒中患者诊断中使用磁共振3D-pCASL检查成像能够保障检查结果的精确性,且检查方式的特异性以及敏感性都较高,所以应用中能为患者的临床治疗提供可靠的参考依据。

关键词：磁共振3D-pCASL 成像技术急性缺血性脑卒中临床诊断

Role of catalyst surface-active sites in the hydrogenation ofα,β-unsaturated aldehyde

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2024年第6期18卷 41-69页

作者： Haixiang Shi tongming Su Zuzeng Qin Hongbing Ji School of Chemistry and Chemical Engineering Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification TechnologyGuangxi UniversityNanning 530004China Zhejiang Green Petrochemical and Light Hydrocarbon Transformation Research Institute Zhejiang University of TechnologyHangzhou 310014China

As an important technology in fine chemical production,the selective hydrogenation ofα,β-unsaturated aldehydes has attracted much attention in recent *** the process ofα,β-unsaturated aldehyde hydrogenation,a conjugated system is formed between>C=CC=O,leading to hydrogenation at both ends of the conjugated system,which competes with each other and results in more complex ***,improving the reaction selectivity is also difficult in industrial ***,many researchers have reported that surface-active sites on catalysts play a crucial role inα,β-unsaturated aldehyde *** review attempts to summarize recent advances in understanding the effects of surface-active sites(SASs)over metal catalysts for enhancing the process of *** construction strategies and roles of SASs for hydrogenation catalysts are *** attention has been given to the adsorption configuration and transformation mechanism ofα,β-unsaturated aldehydes on catalysts,which contributes to understanding the relationship between SASs and hydrogenation *** addition,recent advances in metal-supported catalysts for the selective hydrogenation ofα,β-unsaturated aldehydes to understand the role of SASs in hydrogenation are briefly ***,the opportunities and challenges will be highlighted for the future development of the precise construction of SASs.

关键词： α,β-unsaturatedd aldehydes hydrogenation active site cinnamaldehyde

An MPI parallel DEM-IMB-LBM framework for simulating fluid-solid interaction problems

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 Rock Mechanics and Geotechnical Engineering 2024年第6期16卷 2219-2231页

作者： Ming Xia Liuhong Deng Fengqiang Gong tongming Qu Y.T.Feng Jin Yu Hunan Key Laboratory of Geomechanics and Engineering Safety Xiangtan UniversityXiangtan411105China School of Civil Engineering Southeast UniversityNanjing211189China Department of Civil and Environmental Engineering Hong Kong University of Science and TechnologyHong KongChina Zienkiewicz Centre for Computational Engineering Swansea UniversitySwanseaSA18ENUK Fujian Research Center for Tunneling and Urban Underground Space Engineering Huaqiao UniversityXiamen361021China

The high-resolution DEM-IMB-LBM model can accurately describe pore-scale fluid-solid interactions,but its potential for use in geotechnical engineering analysis has not been fully unleashed due to its prohibitive computational *** overcome this limitation,a message passing interface(MPI)parallel DEM-IMB-LBM framework is proposed aimed at enhancing computation *** framework utilises a static domain decomposition scheme,with the entire computation domain being decomposed into multiple subdomains according to predefined processors.A detailed parallel strategy is employed for both contact detection and hydrodynamic force *** particular,a particle ID re-numbering scheme is proposed to handle particle transitions across sub-domain *** benchmarks are conducted to validate the accuracy and overall performance of the proposed ***,the framework is applied to simulate scenarios involving multi-particle sedimentation and submarine *** numerical examples effectively demonstrate the robustness and applicability of the MPI parallel DEM-IMB-LBM framework.

关键词： Discrete element method(DEM) Lattice Boltzmann method(LBM) Immersed moving boundary(IMB) Multi-cores parallelization Message passing interface(MPI) CPU Submarine landslides