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Efficient and selective recovery of Gd(Ⅲ)via polyethyleneimine modification of lanthanum-based metal-organic frameworks

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Journal of Rare Earths 2024年第1期42卷 210-219,I0007页

作者： Wenhao Li Lijinhong Huang Bin Xiao Xiaoguang Duan Haike Li Lang Li Wanfu Huang Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and TechnologyGanzhou341000China Innovation Center for Water Quality Security Technology at Ganjiang River Basin Jiangxi University of Science and TechnologyGanzhou341000China Faculty of Science and Engineering WA School of Mines:MineralsEnergy and Chemical EngineeringCurtin UniversityWAAustralia School of Architecture and Design Jiangxi University of Science and TechnologyGanzhou341000China School of Resources and Architectural Engineering Gannan University of Science and TechnologyGanzhou341000China School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaideSA5005Australia School of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou341000China

With the development of the economy and the increasing demand for environmental protection,the efficient and selective recovery of Gd(Ⅲ)from actual wastewater is of critical *** this work,lanthanum-based metal-organic framework(LaBDC)materials were prepared by a hydrothermal method,and then polyethyleneimine(PEI)and LaBDC were combined by an impregnation method to form a novel LaBDC@xPEI *** prepared materials were characterized using Fourier transfo rm infrared spectroscopy(FTIR),X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX),B runauer-Emmett-Teller(BET),thermogravimetric analysis(TGA)and X-ray photoelectron spectroscopy(XPS).Experiments show that LaBDC@50%PEI has the highest adsorption capacity(181.77 mg/g)among lanthanum-based MOFs with different PEI loadings at pH=5.5,which is about 5.1 times that of bare *** adsorption isotherm analysis shows that LaBDC@50%PEI follows the Langmuir *** addition,the adsorption kinetics of LaBDC@50%PEI follows a pseudo-second-order kinetic model,indicating that the adsorption process is chemical *** is worth noting that LaBDC@50%PEI maintains good adsorption performance and stability after three recycling tests,and exhibits excellent selectivity in cation interference ***,the LaBDC@50%PEI composites possess good stability and hold great promises in rapid recovery of Gd(Ⅲ)from practical aqueous environments.

关键词： Wet-impregnation method Polyethylene imine Metaleorganic frameworks Lanthanum Recovery of Gd(Ⅲ) Rare earths

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Evaluating different levels of information on the calibration of building energy simulation models

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Building Simulation 2024年第4期17卷 657-676页

作者： Siyu Cheng Zeynep Duygu Tekler Hongyuan Ji Wenxin Li Adrian Chong Department of the Built Environment College of Design and EngineeringNational University of Singapore4 Architecture DriveSingapore117566Singapore School of Civil Engineering and Architecture Chongqing University of Science and TechnologyChongqing401331China School of Energy and Environment Southeast UniversityNanjing210096China

A poorly calibrated model undermines confidence in the effectiveness of building energy simulation, impeding the widespread application of advanced energy conservation measures (ECMs). Striking a balance between information-gathering efforts and achieving sufficient model credibility is crucial but often obscured by ambiguities. To address this gap, we model and calibrate a test bed with different levels of information (LOI). Beginning with an initial model based on building geometry (LOI 1), we progressively introduce additional information, including nameplate information (LOI 2), envelope conductivity (LOI 3), zone infiltration rate (LOI 4), AHU fan power (LOI 5), and HVAC data (LOI 6). The models are evaluated for accuracy, consistency, and the robustness of their predictions. Our results indicate that adding more information for calibration leads to improved data fit. However, this improvement is not uniform across all observed outputs due to identifiability issues. Furthermore, for energy-saving analysis, adding more information can significantly affect the projected energy savings by up to two times. Nevertheless, for ECM ranking, models that did not meet ASHRAE 14 accuracy thresholds can yield correct retrofit decisions. These findings underscore equifinality in modeling complex building systems. Clearly, predictive accuracy is not synonymous with model credibility. Therefore, to balance efforts in information-gathering and model reliability, it is crucial to (1) determine the minimum level of information required for calibration compatible with its intended purpose and (2) calibrate models with information closely linked to all outputs of interest, particularly when simultaneous accuracy for multiple outputs is necessary.

关键词： calibration building energy simulation(BES) energy conservation measure(ECM) level of information field measurements

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MeshWGAN: Mesh-to-Mesh Wasserstein GAN with Multi-Task Gradient Penalty for 3D Facial Geometric Age Transformation

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IEEE Transactions on Visualization and Computer Graphics 2024年第8期30卷 4927-4940页

作者： Zhang, Jie Zhou, Kangneng Luximon, Yan Lee, Tong-Yee Li, Ping The Hong Kong Polytechnic University Department of Computing The School of Design Hong Kong University of Science and Technology Beijing School of Computer and Communication Engineering Beijing100083 China The Hong Kong Polytechnic University School of Design Hong Kong Laboratory for Artificial Intelligence in Design Hong Kong National Cheng-Kung University Department of Computer Science and Information Engineering Tainan70101 Taiwan

As the metaverse develops rapidly, 3D facial age transformation is attracting increasing attention, which may bring many potential benefits to a wide variety of users, e.g., 3D aging figures creation, 3D facial data augmentation and editing. Compared with 2D methods, 3D face aging is an underexplored problem. To fill this gap, we propose a new mesh-to-mesh Wasserstein generative adversarial network (MeshWGAN) with a multi-task gradient penalty to model a continuous bi-directional 3D facial geometric aging process. To the best of our knowledge, this is the first architecture to achieve 3D facial geometric age transformation via real 3D scans. As previous image-to-image translation methods cannot be directly applied to the 3D facial mesh, which is totally different from 2D images, we built a mesh encoder, decoder, and multi-task discriminator to facilitate mesh-to-mesh transformations. To mitigate the lack of 3D datasets containing children's faces, we collected scans from 765 subjects aged 5-17 in combination with existing 3D face databases, which provided a large training dataset. Experiments have shown that our architecture can predict 3D facial aging geometries with better identity preservation and age closeness compared to 3D trivial baselines. We also demonstrated the advantages of our approach via various 3D face-related graphics applications. © 1995-2012 IEEE.

关键词： Face recognition

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Effect of a static pedestrian as an exit obstacle on evacuation

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Chinese Physics B 2023年第1期32卷 615-625页

作者：胡杨慧毕钰帛张俊练丽萍宋卫国高伟 School of Chemical Engineering Dalian University of TechnologyDalian 116024China State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230027China School of Architectural Engineering Shenzhen PolytechnicShenzhen 518055China School of Urban Planning and Design Peking University Shenzhen Graduate SchoolShenzhen 518055China

Building exit as a bottleneck structure is the last and the most congested stage in building *** is well known that obstacles at the exit affect the evacuation process,but few researchers pay attention to the effect of stationary pedestrians(the elderly with slow speed,the injured,and the static evacuation guide)as obstacles at the exit on the evacuation *** paper explores the influence of the presence of a stationary pedestrian as an obstacle at the exit on the evacuation from experiments and *** use a software,Pathfinder,based on the agent-based model to study the effect of ratios of exit width(D)to distance(d)between the static pedestrian and the exit,the asymmetric structure by shifting the static pedestrian upward,and types of obstacles on *** show that the evacuation time of scenes with a static pedestrian is longer than that of scenes with an obstacle due to the unexpected hindering effect of the static *** ratios of D/d have different effects on evacuation *** the five D/d ratios in this paper,the evacuation efficiency is the largest when d is equal to 0.75D,and the existence of the static pedestrian has a positive impact on evacuation in this *** influence of the asymmetric structure of the static pedestrian on evacuation efficiency is affected by D/*** study can provide a theoretical basis for crowd management and evacuation plan near the exit of complex buildings and facilities.

关键词： evacuation exit obstacle static pedestrian pathfinder simulation

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Evaluation of sand subgrade seepage erosion caused by buried pipeline leakage

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Proceedings of the Institution of Civil Engineers: Geotechnical engineering 2025年第2期178卷 257-271页

作者： Chen, Wenxin Chen, Yekai Su, Zhihang Zhao, Liyuan Chen, Xianghua School of Civil Engineering and Transportation South China University of Technology Guangdong Guangzhou China School of Civil Engineering and Transportation South China University of Technology Guangdong Guangzhou China Guangzhou traffic design and Research Institute Co. Ltd. Guangdong Guangzhou China

Leakage from buried pipelines can lead to an increase in the water content of the subgrade soils and a rise in the water table, leading to soil loosening, erosion and ultimately the formation of hidden voids and roadway collapses. This study presents a discrete-element method and validates its accuracy by utilising cavity data from model experiments. It investigates the mechanism of seepage erosion resulting from pipe leakage and analyses the development of the soil arch effect. Furthermore, it discusses the influence of sand void ratio and particle size on sand seepage erosion. The results indicate that the erosion area is primarily affected by the void ratio and particle size. In comparison to soil particles ranging from 0.1 to 5 mm and from 2 to 5 mm, those with sizes between 0.1 mm and 2 mm generate areas of erosion and loosening that are approximately 40% larger. The proposed model offers a precise analysis of the developmental process and the extent of seepage erosion, thereby contributing to the prediction of potential road cavity areas based on dynamic changes in key factors such as subgrade soil type and groundwater level. © 2025 Emerald Publishing Limited: All rights reserved.

关键词： Sand

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Precipitating thermally reinforcement phase in aluminum alloys for enhanced strength at 400℃

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Journal of Materials Science & technology 2024年第5期172卷 71-82页

作者： Xiang Su Yuan Lei Yang Chen Hongjie Qu Zhixiang Qi Gong Zheng Xu Liu Henggao Xiang Guang Chen National Key Laboratory of Advanced Casting Technologies MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials TechnologyEngineering Research Center of Materials Behavior and DesignMinistry of EducationNanjing University of Science and TechnologyNanjing 210094China School of Aviation and Mechanical Engineering Changzhou Institute of TechnologyChangzhou 213032China

Heat-resistant aluminum alloys are widely used in aerospace and automotive fields for manufacturing hot components due to their advantages in lightweight design and energy ***,the high-temperature strength of existing cast aluminum alloys is always limited to about 100 MPa at 350℃due to coarsening and transformation of strengthening ***,we reveal that the yield strength and ultimate tensile strength of the T6 state Al-8.4Cu-2.3Ce-1.0Mn-0.5Ni-0.2Zr alloy at 400◦C increase by 34%and 44%after re-aging at 300℃for 100 h,and its thermal strength exhibits distinguished ad-vantage over traditional heat-resistant aluminum *** enhanced elevated-temperature strength is attributed to the reprecipitation of the Ni-bearing T-Al_(20)Cu_(2)Mn_(3)phase,whose number density increases over one *** significant segregation of Ni,Ce,and Zr elements at the interfaces helps improve the thermal stability of the T *** thermostable T phase effectively strengthens the matrix by in-hibiting dislocation ***,a highly interconnected 3D intermetallic network along the grain boundaries can still remain after long-term re-aging at 300℃,which is conducive to imposing a drag on the grain boundaries at high *** finding offers a viable route for enhancing the elevated-temperature strength of heat-resistant aluminum alloys,which could provide expanded opportunities for higher-temperature applications.

关键词： Aluminum alloys Precipitation Thermally reinforcement phase Re-aging treatment High-temperature strength

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Low volume production layout optimization - An intelligent enabler based model

Low volume production layout optimization - An intelligent e...

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2024 IEEE Conference on engineering Informatics, ICEI 2024

作者： Dcoutho, John Frederick Eisenbart, Boris Yadla, Venkata Kulkarni, Ambarish Swinburne University of Technology School of Engineering HawthornVIC Australia Swinburne University of Technology School of Design HawthornVIC Australia

ISBN: (纸本)9798331505776

The manufacturing industry is witnessing an increase in demand for low volume individualized composite products. However, integrating this process intensive composite manufacturing into the traditional materials based production line requires an adaptive and dynamic factory layout planning. Isolated simulation models cannot address the complexities involved in seamless integration of distinct products to existing production lines. Hence, this paper proposes a transformative technology enabled Digital Twin (DT) integrated system that leverages data, based on appropriate level of abstraction to simplify the system. The model leverages a combination of Discrete Event Simulation (DES) and Agent Based Modeling (ABM) to accurately represent a carbon fiber production facility. The proposed model analyzed both independent and correlated variables and identified key enablers that influence layout planning decisions. The integrated model revealed that the Double Diaphragm Preforming workstation experienced ∼65% idle time. The correlated variables led to locating targeted iterations through Pearson's correlation coefficient analysis and identified strong interdependencies of 0.9967 between press tool and trimming workstations. This novel technique provided insights on machine interactions and optimize complex systems using hybrid simulation and an immersive environment. The proposed framework established flexibility through targeted parameter adjustments and improved responsiveness towards the dynamic production landscape. © 2024 IEEE.

关键词： Smart manufacturing

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Virtual Simulation Experimental Teaching Method and Practice Based on BOPPPS Teaching Model: An Example of Virtual Simulation Experiment Platform of Jiajiang Bamboo Paper Making Skills

Virtual Simulation Experimental Teaching Method and Practice...

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2023 International Symposium on design Studies and Intelligence engineering, DSIE 2023

作者： Li, Fangyu Li, Jiayi Li, Yefei School of Design Southwest Jiaotong University China Art Design Dept Engineering & Technical College Chengdu University of Technology China School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China China

ISBN: (纸本)9781643684888

Based on the research of intangible cultural heritage, this study summarizes and organizes the non-heritage knowledge of the bamboo paper making techniques of the JIJIANG River, takes the characteristics of virtual simulation experiment into reasonable consideration, and carries out the design of the virtual simulation experiment platform of the bamboo paper making techniques of the JIANG River based on the BOPPPS teaching model and task-driven teaching method. The platform includes the integration of the theoretical basic knowledge of the technique of making bamboo paper and the establishment of a 3D virtual scene of the paper-making workshop one by one. By combining the techniques of paper making with virtual simulation technology, students can be highly immersed in the "experiment" and motivated and motivated to learn. At the same time, it enriches the way of preserving and passing on the craft, leading users to explore it actively and enhancing their sense of participation. It also provides a reference for the preservation and transmission of other intangible cultural heritage, especially traditional crafts, in the virtual simulation experiment environment. © 2024 The Authors.

关键词： Bamboo

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Preface to the Special Issue "Fundamentals and Application Technologies for Microstructural Control of Hot-dip Galvanized Coatings for Creating New Functionalities"

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Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2025年第6期111卷 273-274页

作者： Takata, Naoki Ueda, Mitsutoshi Department of Materials Design Innovation Engineering Nagoya University Japan Division of Materials Science and Engineering Faculty of Engineering Hokkaido University Japan School of Materials and Chemical Technology Institute of Science Tokyo Japan

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Drone rotor performance under icing conditions

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CEAS Aeronautical Journal 2025年 1-10页

作者： Gupta, Avani Gahlot, Aishwerya Singh Sankar, Lakshmi N. Turbomachinery Manufacturing and Design Linde Inc. TonawandaNY United States School of Aerospace Engineering Georgia Institute of Technology AtlantaGA United States

Low- and high-fidelity physics-based models for assessing the aerodynamic performance of drone and eVTOL rotors under icing conditions are examined. The low fidelity model in this work makes use of a lifting line model of the rotor with a prescribed inflow coupled to an ice accretion solver for modeling ice growth, and an interactive boundary layer model for the generation of airfoil drag polars. The higher fidelity model employed in this study uses a 3-D unsteady Navier–Stokes analysis with a tightly coupled water droplet transport model for modeling the collection of liquid droplets over the rotor. The rotor shape is periodically updated to account for the ice formation. Low fidelity calculations for an 81% scaled-down version of the Bell APT70 drone rotor tested at Université du Québec à Montréal provide reasonable estimates of the loss in thrust and rise in power during the initial stages of ice growth. Higher fidelity models are found to be better suited for multirotor configurations with nonlinear wake interactions, while eliminating the needs for airfoil drag polars, tip loss models, and empirical compressibility corrections. © Deutsches Zentrum für Luft- und Raumfahrt e.V. 2025.

关键词： Boundary layers

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