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检索条件"丛书名=Lecture Notes in Mechanical Engineering"

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Establishment of Dynamic Cell Freezing Model and Influence of Intracellular Freezing Curve 14th

Establishment of Dynamic Cell Freezing Model and Influence o...

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14th International Conference on Computational Heat and Mass Transfer (ICCHMT)

作者： Ye, Zhenhong Zhang, Le Chen, Jiangping Shanghai Jiao Tong Univ Sch Mech Engn Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Sch Biomed Engn Shanghai 200240 Peoples R China

ISBN: (纸本)9783031672408;9783031672415

Pioneering advancements in cell cryobiology have led to the development of numerous biomedical applications, such as organ preservation. However, the mechanism of intracellular injury remains a subject of debate, and the influencing factors of cryoinjury continue to be elusive. Furthermore, research investigating the effects of varying freezing curves and the concentration of protective agents on cells, as well as their interactions with cells, is scant. This study delves into the rapid, controllable response of cell protectant concentration and cell freezing curve. We establish a thermodynamic model to explore the optimal freezing parameters of temperature, concentration, and flow rate during organ protection and regulation. By addressing the issue of insufficient constant freezing rate in existing studies, we obtain the optimal freezing strategy. The results indicate that effectively regulating the freezing curve significantly enhances cell preservation efficiency.

关键词： Thermodynamics Macro and Micro structure Functional analysis Cooling curve

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Application of Life Cycle Assessment (LCA) in the Fast-Moving Consumer Goods Sector 1

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8th International Scientific-Technical Conference (MANUFACTURING)

作者： Atarisharghi, Elahe Bataleblu, Ali Asghar Emer, Asja Golser, Michaela Rauch, Erwin Matt, Dominik T. Free Univ Bozen Bolzano Ind Engn & Automat IEA Bolzano Italy Fraunhofer Res Italia Innovat Engn Ctr Bolzano Italy

ISBN: (数字)9783031564741

ISBN: (纸本)9783031564765;9783031564741

This study focuses on the significant role of transportation in the supply chain and industrial sectors as a contributing factor to global warming. The goal of this study is to analyze the application of Life Cycle Assessment (LCA) software and modeling for minimizing emissions released during transportation and to compare various scenarios for a specific route. The study aims to assess both the environmental impact and cost considerations associated with different transportation modes by using a real case study example taken from a company in the Fast-Moving Consumer Goods industry. By employing LCA methodologies, the emissions and associated impacts are quantified, allowing for a comprehensive comparison of the transportation options. The study provides valuable insights into the sustainability implications of these choices and contributes to the understanding of how different transportation modes affect global warming. The findings highlight the importance of considering both environmental and economic factors when making decisions regarding transportation in the supply chain and industry to minimize emissions and mitigate the impact of global warming. Further, the findings show the potential of using LCA software and methodology in the FMCG industry.

关键词： Life Cycle Assessment Sustainability Fast Moving Consumer Goods Sustainable Manufacturing

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Objective and Subjective Factors Affecting Neurodiverse Inclusion in Manufacturing 8th

Objective and Subjective Factors Affecting Neurodiverse Incl...

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8th International Scientific-Technical Conference (MANUFACTURING)

作者： Antonelli, Dario Marina, Alessia Stadnicka, Dorota Litwin, Pawel Politecn Torino I-10129 Turin Italy Rzeszow Univ Technol Rzeszow Poland

ISBN: (纸本)9783031564581;9783031564567

The workplace inclusion of individuals with cognitive disabilities, or neurodiversity, is a multifaceted and intricate phenomenon that necessitates a comprehensive understanding of the factors that either facilitate or hinder it. Tools that can aid in achieving this understanding are the fuzzy cognitive maps, graphical representations of the mental models that individuals or groups possess regarding a particular topic. This paper employs cognitive maps to examine perceived barriers to inclusion among various stakeholders in enterprises, including managers, employees, and individuals with disabilities. Additionally, we analyze survey results from employees in enterprises of varying sizes and sectors to evaluate attitudes towards disabled individuals and the level of inclusion they experience. The comparison of the cognitive maps with the survey revealed several biases affecting the attitude of normal workers towards neurodiverse individuals. Analysis of these anomalies enabled the authors to propose recommendations for improving inclusion practices and policies in enterprises.

关键词： Workers with disabilities manufacturing inclusion Cognitive Maps

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Exploring Industry 5.0 for Remanufacturing of Lithium-Ion Batteries in Electric Vehicles 1

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7th International Workshop on Autonomous Remanufacturing (IWAR)

作者： Neri, Alessandro Butturi, Maria Angela da Silva, Leandro Tomasin Lolli, Francesco Gamberini, Rita Sellitto, Miguel Afonso Univ Bologna Dept Ind Engn Via Zamboni 33 I-40126 Bologna Italy Univ Modena & Reggio Emilia Dept Sci & Methods Engn Piazzale Europa 1 I-42100 Reggio Emilia Italy Univ Vale Rio dos Sinos Prod & Syst Engn Grad Program Ave Unisinos 950 BR-93022000 Sao Leopoldo Brazil Univ Modena & Reggio Emilia En&Tech Interdipartimental Ctr Via Amendola 2 I-42122 Reggio Emilia Italy Univ Modena & Reggio Emilia InterMech MORE Interdept Ctr Via Amendola 2 I-42122 Reggio Emilia Italy

ISBN: (数字)9783031526497

ISBN: (纸本)9783031526480;9783031526497

The growing demand for electric vehicles exacerbates concerns over the environmental implications of lithium-ion battery waste, which poses risks to both ecological systems and public health. While remanufacturing has been acknowledged as a viable, sustainable pathway for mitigating these issues, existing literature lacks a comprehensive investigation into the role of Industry 5.0 technologies in optimising this process. To achieve this goal, this study compares and evaluates the potential of different Industry 5.0 technologies and approaches to support the remanufacturing process of lithium-ion batteries. Specifically, we apply the AHP-PROMETHEE method to identify the most critical and influential Industry 5.0 prospects that should be prioritised for development and implementation. The novelty of our approach lies in the identification of critical Industry 5.0 imperatives that can enable efficient and effective remanufacturing processes. The analysis is supported by a comprehensive review of the relevant literature. The results of our study provide important implications for policymakers, battery manufacturers, and remanufacturing companies. By prioritising key Industry 5.0 technologies like digital twins, the Internet of Everything, and blockchain, this study shows that carmakers can significantly improve efficiency and sustainability in battery remanufacturing. This paper contributes to the emerging research on the integration of Industry 5.0 technologies in the remanufacturing process of lithium-ion batteries. Our next step is to explore the potential of the identified technologies in real-life applications and to evaluate their impact on the sustainability and efficiency of the remanufacturing process of lithium-ion batteries.

关键词： Lithium-ion batteries Remanufacturing Industry 5.0 Sustainability MCDM Automotive

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Modeling and Analysis of a Piezoelectric Bimorph Cantilevered Beam for Vibration Energy Harvesting 10th

Modeling and Analysis of a Piezoelectric Bimorph Cantilevere...

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10th International Conference on Design and Modeling of mechanical Systems (CMSM)

作者： Mhiri, Mohamed Taha Larbi, Walid Chouchane, Mnaouar Guerich, Mohamed Natl Engn Sch Monastir ENIM Ave Ibn Jazzar Monastir 5019 Tunisia Conservatoire Natl Arts & Metiers Cnam Lab Mecan Struct & Syst Couples LMSSC 2 Rue Conte F-75003 Paris France Leonard de Vinci Pole Univ Res Ctr F-92916 Paris France

ISBN: (纸本)9783031671517;9783031671524

This paper presents an extensive investigation into the modeling and analysis of a piezoelectric bimorph cantilevered beam designed for vibration energy harvesting. By employing finite element analysis (FEA), the study explores various beam models, encompassing 1D Euler-Bernoulli, 2D, and 3D representations, to determine the eigenfrequencies and electromechanical responses of the energy harvester. The research includes a comparative analysis, which contrasts the results obtained from the proposed FE models with the experimental findings of Erturk and Inman, as well as analytical solutions. The results reveal that the 3D model exhibits minimal error. Additionally, using the 3D model, this work investigates the influence of tip mass shape on the electromechanical response of the system, suggesting that a parallelepiped shape maximizes voltage output while maintaining a lower resonant frequency.

关键词： Energy harvesting Piezoelectric cantilever bimorph Finite element analysis

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Passive Air Injection Through Slots for Improving the Performance of a Hollow-Bladed Axial Fan: A Numerical Study 14th

Passive Air Injection Through Slots for Improving the Perfor...

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14th International Conference on Computational Heat and Mass Transfer (ICCHMT)

作者： Bouanik, Ayoub Larabi, Abderrahim Azzam, Tarik Mekadem, Mahmoud Abbasnezhad, Navideh Bakir, Farid Acad Mil Cherchell Lab Rech Energet Ecoulements & Transferts Bp 48 Cherchell Terre Cherchell 42067 Tipaza Algeria Ecole Mil Polytech Lab Mecan Fluides Bp 17 Algiers 16046 Algeria HESAM Univ Arts & Metiers Inst Technol LIFSE CNAM 151 Blvd Hop F-75013 Paris France

ISBN: (纸本)9783031666087;9783031666094

Currently, axial fans equipped with hollow blades are being increasingly adopted in various industrial applications owing to their lightweight design and low driving motor energy consumption. Consequently, there is a growing emphasis on enhancing their aerodynamic performances. In this study, we conducted a numerical investigation of the fan's performance, aiming to improve it, using a passive air blowing control through 4 mm dimension slot with various positions, as this passive control technique is preferred for its feasibility and efficiency. This approach consists in exploiting the hollow nature of the fan and the centrifugal effect to direct a portion of the main flow from the geometrically modified hub to the tip clearance zone via the hollow blades. The results indicate a significant enhancement in the fan's performance, with a 43% increase in aeraulic power for opened hub configuration, which is 11% higher than active control using the same fan geometry and operating conditions. Furthermore, incorporating a centrifugal fan into the hub increase the main flow by drawing in extra air, particularly at higher flow rates. This leads to a 12% increase in aeraulic power compared to the approach of opening the hub. Employing passive techniques can also enhance the fan's performance and diminish the leakage flow that contributes to noise emissions and performance decreasing. This is evident in the substantial modifications observed in the overall flow topology around the fan.

关键词： Axial Fan Hollow Blades Passive Control Slots

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Analysis of Multiaxial Tensile Stresses in Cold Forging Tools 14th

Analysis of Multiaxial Tensile Stresses in Cold Forging Tool...

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14th International Conference on Numerical Methods in Industrial Forming Processes (NUMIFORM)

作者： Killmann, Martin Merklein, Marion Friedrich Alexander Univ Erlangen Nurnberg Inst Mfg Technol Egerlandstr 13 D-91058 Erlangen Germany

ISBN: (纸本)9783031580086;9783031580062;9783031580055

Tools have a key role in cold forging as they directly influence part quality and process economics. High loads from the contact pressure exhibited by the workpiece are a major challenge regarding tool life. In complex geometries, tensile die stresses are concentrated in local areas and oriented both in axial and tangential directions. This superposition of loads leads to fatigue failure at the stress peaks. Since the interactions of multidirectional tensile stresses in cold forging tools have not been investigated in previous investigations, this paper aims to better understand the formation of local stress concentrations in axial and tensile directions as well as the possibilities to influence them. As tool loads in critical areas are difficult to measure during the process, simulation plays an important role in the evaluation of die stresses. Therefore, a model process with multiaxial tool stresses is simulated and the simulation results are compared to experimental values in order to validate the model. The simulation is then used to analyse the die load depending on the prestressing system.

关键词： Cold forming Die Stress

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Mesh Transformation Effects in Three-Dimensional Hydrodynamic Modelling of Gulf of Kachchh 23rd

Mesh Transformation Effects in Three-Dimensional Hydrodynami...

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2022 International Association for Hydraulic Environmental engineering and Research Asia Pacific Division

作者： Susmitha, Thankachan Sidharth, Kanakkassery Raju Saichenthur, Nandhakumar Murali, Kantharaj IIT Madras Natl Technol Ctr Ports Waterways & Coasts Chennai Tamil Nadu India IIT Madras Chennai Tamil Nadu India

ISBN: (纸本)9789819760084;9789819760091

In hydrodynamic studies, there are very abrupt changes in physical variables both spatially and temporally in a water column. For example, vertical velocity distribution, thermal and saline stratification, and so on. In this study, multiple mesh transformation techniques such as sigma (sigma) and z-star (z*) transformations are used to determine which is best for achieving efficient results when simulating. This study aims to figure out which method can improve the accuracy of the results without using an excessive number of layers and validating the current velocity and tidal range in the domain with the measured values. The selected domain for the study is the Kandla region in Gulf of Kachchh (GoK). The study area is a region with the highest potential of tidal energy and has the presence of estuaries and creeks that are characterized by higher velocities and tidal ranges. The study includes the comparison of computational time and the accuracy of the results while using different mesh transformation techniques. A statistical evaluation to study the accuracy of the mesh transformation techniques along with the computation stability and time are discussed in this paper.

关键词： Sigma (sigma) transformation z-star (z*) transformation

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Exploring the Impact of Geometric Model Fidelity on the Sim-to-Real Gap in Visual Robot Perception 1

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33rd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Tanz, Lukas Mueller, Julian Geng, Paul Daub, Ruediger Tech Univ Munich TUM Inst Machine Tools & Ind Management Iwb TUM Sch Engn & Design D-85748 Garching Germany Fraunhofer Inst Casting Composite & Proc Technol IGCV D-86159 Augsburg Germany

ISBN: (数字)9783031744853

ISBN: (纸本)9783031744846;9783031744853

In recent years, synthetic training data has proven its potential to overcome data scarcity as a major bottleneck in AI applications. Robotics benefits from this approach, as perceptual AI models can be trained safely and cost-effectively. However, it is impossible to fully reproduce reality, which results in a loss of performance when the models are applied to real-world data. To control the so-called sim-to-real gap, domain randomization is widely regarded as a solution. The variation of hard-to-control parameters, such as lighting conditions or object textures in the case of visual perception, forces models to focus on more robust shape-related information. Extensive research has been devoted to determining the appropriate level of randomization for computer vision models. Thereby, the availability of geometric object models is usually taken for granted. However, industrial practice shows that these models are often unavailable or incorrect. The effort required for geometric modelling correlates with model fidelity and can easily exceed the cost of actual synthetic data generation. To provide practical guidance, this paper investigates how the sim-to-real gap is influenced by model fidelity. In addition to conventional computer-aided design, 3D scans of real objects were considered as a cost-effective alternative for producing geometrically accurate models. The results indicate that high geometric model fidelity is not mandatory and that simplified models are a cost-effective alternative.

关键词： Applied AI Sim-to-Real Gap Domain Randomization Visual Servoing Computer Vision

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Use of Heterogeneous Microphone Triplets for Simplified Noise Apportionment in Pass-By Measurements 14th

Use of Heterogeneous Microphone Triplets for Simplified Nois...

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14th International Workshop on Railway Noise (IWRN)

作者： Sole, Jaume Huguenet, Pierre Ferrandiz, Mercedes Gutierrez SENER Ingn & Sistemas Noise & Vibrat Tech Off C Creu Casas I Sicart 86-88 Barcelona 08290 Spain UIC Int Union Railways Head Asset Management Infrastruct & Interfaces Ro 16 Rue Jean Rey F-75015 Paris France

ISBN: (纸本)9789819978519;9789819978526

Localization of different noise sources in a high-speed train has been endeavored in the past with reasonable success. In most cases, this localization has been achieved by means of microphone arrays and also with the help of fixed or removable barriers. However, these techniques had the drawback of needing complex post-processing and frequently have complicated set-ups. Also, very often the assessment obtained with these methods has been predominantly qualitative, and not quantitative. High speed railways have the distinctive feature (with respect to conventional railways) of emitting significant amounts of aerodynamic noise. Aerodynamical noise levels emitted by different high-speed units depend on a number of design details which can significantly change emission values. High speed railway lines are increasingly spreading in modern countries where, simultaneously, environmental concerns about noise levels are also on the rise. Therefore, a practical methodology for assessing and comparing aerodynamic noise levels coming from high speed units has been declared as desirable both by international railway organizations such as UIC and national railway network managers. This article presents a quite simplified methodology capable of achieving a quantitative apportionment of noise coming from different directions in a high-speed railway pass-by.

关键词： Railway noise prediction Pantograph Rolling noise

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