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Journal of Responsible Production and Consumption 2024年第2期2卷 1-42页

作者： Kartika Nur Alfina R.M. Chandima Ratnayake Dermawan Wibisono Nur Budi Mulyono Mursyid Basri School of Business and Management Bandung Institute of Technology Bandung Indonesia and Department of Mechanical and Structural Engineering and Material Science University of Stavanger Stavanger Norway Department of Mechanical and Structural Engineering and Material Science University of Stavanger Stavanger Norway School of Business and Management Bandung Institute of Technology Bandung Indonesia

Purpose The purpose of this study is to explore the integration of risk management and circular economy (CE) principles within the healthcare sector to promote sustainability and resilience. Specifically, the study aims to demonstrate how risk management can support the transition to a circular economy in healthcare supply chains. By integrating risk management practices with CE principles, healthcare organizations can identify potential risks and opportunities associated with circular initiatives. Design/methodology/approach This study adopts a qualitative research approach, using a case study methodology with semi-structured interviews conducted at primary care facilities to understand the application of CE principles in practice. The study uses fuzzy logic methods to assess and mitigate risks associated with strategies promoting CE principles. Additionally, key performance indicators are identified to evaluate the effectiveness and enhance the resilience of these strategies within healthcare supply chains. Findings The study highlights the critical role of robust risk management strategies in facilitating the transition to a circular economy within healthcare organizations. Primary care facilities, which are critical to frontline healthcare delivery, are particularly vulnerable to product shortages due to supply risks. This study focuses on critical protective equipment, specifically latex gloves and assesses operational risks, including supply, demand and environmental risks, using a fuzzy logic-based model. Import delays were found to be a moderate risk, typically occurring once a year. The research highlights critical KPIs for a successful CE transition within healthcare supply chains, such as on-time delivery and service quality, which are directly related to the risk of supply chain disruption. In addition, the study highlights the significant impact of other CE strategies on healthcare supply chains, including localized production and manufacturi

关键词： Circular economy Fuzzy-logic based model Healthcare supply chain Performance Resilience Risk assessment

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Effect of Overload and Underload on Subsequent Deformation Behavior during Cyclic Deformation

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Zairyo/Journal of the Society of materials science, Japan 2022年第2期71卷 159-166页

作者： Kondou, Ryouji Yama, Katsunari Energy and Environmental Program School of Engineering Faculty of Engineering University of the Ryukyus Nishihara-cho Nakagami-gun Okinawa903-0213 Japan Department of Mechanical Systems Engineering Graduate School of Engineering and Science University of the Ryukyus Nishihara-cho Nakagami-gun Okinawa903-0213 Japan

A multi-scale analysis of elasto-plastic deformation and dislocation movement and accumulation of tricrystalline models during cyclic deformation was performed. The accumulation of dislocations in geometrically necessary dislocations (GNDs) and statistically stored dislocations (SSDs) was investigated in detail. Experimental observations have shown that fatigue life and fatigue crack propagation are also deteriorated when the material is subjected to overload or underload. However, in the microscopic and mesoscopic regions, where the effects of the crack tip shape change are not related to the size of the crack tip, a different phenomenon is essentially occurring. In this paper, the effects of overload and underload are investigated using a simple model without a crack. From the analysis results, it was found that the dislocation structure generated in the material subjected to overload or underload affects the subsequent deformation behavior. However, even though the absolute values are the same, the effects of overloading and underloading on the subsequent deformation are different, and underloading increases the non-uniformity of the subsequent deformation, which is on the dangerous side, while overloading decreases with increasing the number of repetitions. ©2022 The Society of materials science, Japan

关键词： Crack tips

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Field-Tested Drone Spraying System for Precision Agricultural Applications in Sri Lanka: A Case Study in Paddy Fields 10

Field-Tested Drone Spraying System for Precision Agricultura...

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10th International Multidisciplinary engineering Research Conference on Moratuwa engineering Research, MERCon 2024

作者： Kodagoda, Gayantha Perera, G.A.S.U. Lakshitha, M.G.D. Senadhilankara, K.D.P. Shyam Kularathna, A.H.T. Dulantha Lalitharatne, Thilina University of Sri Jayewardenepura Dept. of Interdisciplinary Studies Nugegoda Sri Lanka University of Sri Jayewardenepura Dept. of Electrical & Electronics Engineering Nugegoda Sri Lanka University of Moratuwa Dept. of Mechanical Engineering Moratuwa Sri Lanka Queen Mary University of London School of Engineering and Material Science London United Kingdom

ISBN: (纸本)9798331529048

The study addresses a pressing need of mechanizing and improving the selective chemical spraying process in the agricultural sector in developing countries which is essential for ensuring the food security while maintaining economic efficiency and health of the farmers and consumers. Reducing the manual chemical spraying has become very important in Sri Lanka due to overreliance of pesticides, weedicides, and inorganic fertilizers that has caused severe health and economic impact. Even though there are advanced technologies already developed for such requirements, developing nations like Sri Lanka face challenges in adopting such technologies due to factors like cost and technical knowledge, prompting the development and field testing of a low-cost semi-automated selective chemical spraying mechanism using drones. The project integrates GPS technology for area identification for farmer-friendly coordination. Design considerations for the drone and spraying mechanism are detailed, emphasizing payload capacity, component selection, and structural materials. Validation of optimum design specifications through field testing confirms the efficacy of the developed drone in terms of GPS accuracy, altitude optimization, and spraying performance. Results indicate the feasibility and practicality of the semi-automated drone solution for agricultural needs in Sri Lanka, offering a cost-effective and efficient alternative to manual and fully automated methods. © 2024 IEEE.

关键词： Herbicides

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Physicochemical properties of lard oil and rubber seed oil blends and their comprehensive characterization

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Chinese Journal of Chemical engineering 2024年第11期75卷 1-13页

作者： Amonrat Thangthong Wuttichai Roschat Phongsakorn Pholsupho Aekkaphon Thammayod Sunti Phewphong Tappagorn Leelatam Preecha Moonsin Boonyawan Yoosuk Pathompong Janetaisong Vinich Promarak Program of Environment Science Faculty of Science and TechnologySakon Nakhon Rajabhat UniversityMueang DistrictSakon Nakhon 47000Thailand Biomass Energy Research Laboratory Center of Excellence on Alternative EnergyResearch and Development InstitutionSakon Nakhon Rajabhat UniversityMueang DistrictSakon Nakhon 47000Thailand Program of Chemistry Faculty of Science and TechnologySakon Nakhon Rajabhat UniversityMueang DistrictSakon Nakhon 47000Thailand Innovation in Chemistry for Community Research Unit Faculty of Science and TechnologySakon Nakhon Rajabhat UniversityMueang DistrictSakon Nakhon 47000Thailand Appropriated Technology Center Faculty of Science and TechnologySakon Nakhon Rajabhat UniversityMueang DistrictSakon Nakhon 47000Thailand Program of Chemistry Faculty of ScienceUbon Ratchathani Rajabhat UniversityMueang DistrictUbon Ratchathani 34000Thailand National Energy Technology Center(ENTEC) 114 Thailand Science ParkPhahonyothin RoadKlong LuangPathumthani 12120Thailand Department of Material Science and Engineering School of Molecular Science&EngineeringVidyasirimedhi Institute of Science and TechnologyWangchanRayong 21210Thailand

This research investigates the potential of blending complementary lard oil with rubber seed oil as feedstock for biodiesel *** seed oil,obtained through hexane extraction using the Soxhlet method,contains the major fatty acids of oleic acid(C_(18:1)),palmitic acid(C_(16:0)),linoleic acid(C_(18:2)),and stearic acid(C_(18:0)),while rubber seed oil primarily consists of linoleic acid(C_(18:2)),oleic acid(C_(18:1)),linolenic acid(C_(18:3)),palmitic acid(C_(16:0)),and stearic acid(C_(18:0)).The least acid value of lard oil(0.55 mg KOH/g)can benefit of reducing soap formation of rubber seed oil during transesterification process in biodiesel production due to its substantial-high acid value(16.28 mg KOH/g).Blending at ratios below 80:20 volume ratio produced biodiesel exceeding 85%,utilizing CaO as a *** oil demonstrated a higher reaction rate constant(11.88×10^(-3)min^(-1))than rubber seed oil(2.11×10^(-3)min^(-1)),indicating a significant difference in *** acid value and free fatty acids in rubber seed oil correlated with lower reaction *** a mixture ratio below 80:20 volume ratio optimized reaction rates during biodiesel *** obtained from blends below 80:20 volume ratio met ASTM D6751 and EN 14214 standards,demonstrating suitability for bio-auto *** drawbacks of using rubber seed oil as a raw material for biodiesel production are overcome by blending with lard oil,giving rise to expanding renewable energy options for rural communities,community enterprises,and large-scale biodiesel production.

关键词： Biodiesel oil Rubber seed oil Lard oil High free fatty acid Physicochemical properties Liquid biofuels

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Automated classification of big X-ray diffraction data using deep learning models

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npj Computational materials 2023年第1期9卷 169-180页

作者： Jerardo E.Salgado Samuel Lerman Zhaotong Du Chenliang Xu Niaz Abdolrahim Materials Science program University of RochesterRochesterNew York 14627USA Department of Computer Science University of RochesterRochesterNew York 14627USA Department of Mechanical Engineering University of RochesterRochesterNew York 14627USA Laboratory for Laser Energetics University of RochesterRochesterNew York 14627USA

In current in situ X-ray diffraction(XRD)techniques,data generation surpasses human analytical capabilities,potentially leading to the loss of *** techniques require human intervention,and lack the performance and adaptability required for material *** the critical need for high-throughput automated XRD pattern analysis,we present a generalized deep learning model to classify a diverse set of materials’crystal systems and space *** our approach,we generate training data with a holistic representation of patterns that emerge from varying experimental conditions and crystal *** also employ an expedited learning technique to refine our model’s expertise to experimental *** addition,we optimize model architecture to elicit classification based on Bragg’s Law and use evaluation data to interpret our model’s *** evaluate our models using experimental data,materials unseen in training,and altered cubic crystals,where we observe state-of-the-art performance and even greater advances in space group classification.

关键词： Automate classify cubic

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Enhanced Composite Design Through Incorporation of Tribological Considerations in Micromechanical Models

Enhanced Composite Design Through Incorporation of Tribologi...

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2023 IEEE International Workshop on Sport, Technology and Research, STAR 2023

作者： Jalali, S. Kamal Pugno, Nicola Universita di Trento Laboratory for Bioinspired Bionic Nano Meta Materials and Mechanics Department of Civil Environmental and Mechanical Engineering Trento Italy School of Engineering and Material Science Queen Mary University of London London United Kingdom

ISBN: (纸本)9798350316056

This paper proposes a micromechanical framework for predicting the frictional behavior of composite surfaces. A numerical lattice-based model consisting of a block-spring network with the statistical distribution of local friction coefficient is introduced to determine the friction coefficients of the composite surface. Then, an analytical micromechanical model based on the Halpin-Tsai equation whose fitting parameter is related to the volume fraction of the components is developed to capture the high degree of non-proportionality of the friction coefficient to the volume fraction. The fitting parameter is calibrated to the numerical simulations and experimental data from the literature. The model is then used to predict the mechanical and frictional properties of hybrid carbon-glass-epoxy composites, and it is demonstrated how surface texturing can tune the friction coefficient. This research provides an efficient guide for designing composite parts subject to simultaneous mechanical loading and surface contacting, which are commonly encountered in sports applications. The findings of this study are significant for enhancing the design of composite materials for sports equipment and related industries. © 2023 IEEE.

关键词： Volume fraction

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Construction and Praxis of Six Sigma DMAIC for Bearing Manufacturing Process

Construction and Praxis of Six Sigma DMAIC for Bearing Manuf...

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作者： Kulkarni, Trishul Toksha, Bhagwan Shirsath, Sagar Pankade, Sandeep Autee, Arun T. Department of Mechanical Engineering Maharashtra Institute of Technology MS Aurangaba431010 India Maharashtra Institute of Technology Aurangabad431010 India School of Material Science and Engineering The University of New South Wales KensingtonNSW2052 Australia

The process capability improvement of a bearing manufacturing process using the Six Sigma-DMAIC approach was performed. A progressive method was adopted by the utilization of statistical techniques such as design of experiments for optimizing process capability. We report the draconian improvement in process capability with present approach. This has led to a diminution in high resource spoilage and rework. In the Define-phase, rejection data was used to identify the critical factors responsible for rejection. Process capability indices were used to evaluate the process performance in the Measure-phase. In the Analyze-phase, the vital root causes responsible for low process capability were identified. Using the Taguchi robust design technique, the Improve-phase focuses on optimizing the critical root causes. Analysis of variance was used to examine the results of the experiment. In the control-phase, Cp and Cpk values were improved from 1.170 and 0.976 to 2.780 and 2.230. © 2023

关键词： Six sigma

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Multi-objective Energy Storage Power Allocation Strategy based on GA-APSO Algorithm

IAENG International Journal of Computer Science

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IAENG International Journal of Computer science 2025年第6期52卷 1784-1794页

作者： Li, Hongyan Wu, Jiajing Zhao, Long Wang, Weifeng Sun, Jing Engineer of Electrical and Control Engineering Xi’an University of Science and Technology Xi’an710054 China Electrical and Control Engineering Xi’an University of Science and Technology Xi’an710054 China School of Mechanical and Material Engineering Xi’an University Xi’an710065 China

In order to address the challenge of grid stability posed by the integration of renewable energy sources such as wind and photovoltaic, a multi-objective fusion energy storage power allocation strategy based on the GA-APSO algorithm is proposed as a potential solution. The initial step is to construct a multi-objective fusion model that incorporates the total profit of the energy storage system, the loss rate, and the consistency of the battery charge state. Subsequently, the GA-APSO algorithm is employed to resolve the multi-objective fusion model, with the objective of enhancing the operational efficiency of the energy storage system. Finally, the enhanced allocation strategy is implemented in two arithmetic scenarios for simulation, and the power allocation strategy under the traditional algorithm is evaluated. The results of the simulation demonstrate that the strategy is an effective means of reducing the loss of energy in the VRB energy storage system, reducing the number of charging and discharging cycles of the system, and improving the overall operational efficiency of the system. © (2025), (International Association of Engineers). All rights reserved.

关键词： Multiobjective optimization

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Frontiers in high entropy alloys and high entropy functional materials

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Rare Metals 2024年第10期43卷 4639-4776页

作者： Wen-Tao Zhang Xue-Qian Wang Feng-Qi Zhang Xiao-Ya Cui Bing-Bing Fan Jia-Ming Guo Zhi-Min Guo Rui Huang Wen Huang Xu-Bo Li Meng-Ru Li Yan Ma Zhi-Hua Shen Yong-Gang Sun De-Zhuang Wang Fei-Yang Wang Li-Qiang Wang Nan Wang Tian-Li Wang Wei Wang Xiao-Yang Wang Yi-Han Wang Fu-Jie Yu Yu-Zhen Yin Ling-Kun Zhang Yi Zhang Jian-Yang Zhang Qi Zhao Yu-Ping Zhao Xin-Dong Zhu Yasir Sohail Ya-Nan Chen Tao Feng Qi-Long Gao Hai-Yan He Yong-Jiang Huang Zeng-Bao Jiao Hua Ji Yao Jiang Qiang Li Xiao-Ming Li Wei-Bing Liao Huai-Jun Lin Hui Liu Qi Liu Qing-Feng Liu Wei-Di Liu Xiong-Jun Liu Yang Lu Yi-Ping Lu Wen Ma Xue-Fei Miao Jie Pan Qing Wang Hong-Hui Wu Yuan Wu Tao Yang Wei-Ming Yang Qian Yu Jin-Yu Zhang Zhi-Gang Chen Liang Mao Yang Ren Bao-Long Shen Xun-Li Wang Zhe Jia He Zhu Zhen-Duo Wu Si Lan School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China Jiangsu Key Laboratory for Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China Department of Physics City University of Hong KongHongKong 999077China School of Materials Science and Engineering Tianjin UniversityTianjin 300072China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Department of Mechanical Engineering Research Institute for Advanced ManufacturingThe Hong Kong Polytechnic UniversityHong Kong 100872China Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Institute of Advanced Wear&Corrosion Resistance and Functional Materials Jinan UniversityGuangzhou 510632China School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou 221116China School of Physical Sciences Great Bay UniversityDongguan 523000China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Beijing Advanced Innovation Center for Materials Genome Engineering Research Institute for Carbon NeutralityUniversity of Science and Technology BeijingBeijing 100083China Department of Mechanical Engineering The University of Hong KongHong Kong 999077China School of Computing Macquarie UniversitySydney 2113Australia Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China State Key Laborato

Owing to their exceptional properties,high-entropy alloys(HEAs)and high-entropy materials have emerged as promising research areas and shown diverse ***,the recent advances in the field are comprehensively reviewed,organized into five *** first section introduces the background of HEAs,covering their definition,significance,application prospects,basic properties,design principles,and *** subsequent section focuses on cutting-edge high-entropy structural materials,highlighting developments such as nanostructured alloys,grain boundary engineering,eutectic systems,cryogenic alloys,thin films,micro-nano-lattice structures,additive manufacturing,high entropy metallic glasses,nano-precipitate strengthened alloys,composition modulation,alloy fibers,and refractory *** the following section,the emphasis shifts to functional materials,exploring HEAs as catalysts,magneto-caloric materials,corrosion-resistant alloys,radiation-resistant alloys,hydrogen storage systems,and materials for ***,the review encompasses functional high-entropy materials outside the realm of alloys,including thermoelectric,quantum dots,nanooxide catalysts,energy storage materials,negative thermal expansion ceramics,and high-entropy wave absorption *** paper concludes with an outlook,discussing future directions and potential growth areas in the *** this comprehensive review,researchers,engineers,and scientists may gain valuable insights into the recent progress and opportunities for further exploration in the exciting domains of high-entropy alloys and functional materials.

关键词： High entropy alloys Cutting-edge structural materials Cutting-edgefunctional materials

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Zero Thermal Expansion Metamaterial Designs for Space Structures

Zero Thermal Expansion Metamaterial Designs for Space Struct...

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AIAA science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Lu, Wei-Chun Oudghiri-Idrissi, Othman Poli, Andrea Arruda, Ellen M. Tol, Serife Department of Mechanical Engineering University of Michigan 2350 Hayward St Ann ArborMI48109 United States Fariborz Maseeh Department of Civil Architectural and Environmental Engineering The University of Texas at Austin 301 E. Dean Keeton St AustinTX78712 United States Department of Mechanical Engineering Macromolecular Science and Engineering Program University of Michigan 2350 Hayward St Ann ArborMI48109 United States

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

The precision of space structures is sensitive to high-temperature variation during on-orbit operations. This work develops zero thermal expansion (ZTE) metamaterials that can be integrated into space structures to restrict large thermal deformation under precision requirements. The proposed bi-material ZTE metamaterial beams show extremely low coefficients of thermal expansion (CTE) for a wide temperature variation. Static and dynamic analyses are conducted on the designed metamaterials for performance evaluation. The proposed ZTE beam elements are integrated into a 48-meter rib of a space RF antenna to enhance its thermal precision over a wide temperature range. Further, experimental validation of the ZTE truss beam design is conducted in a thermal chamber to demonstrate its low thermal deformation compared to a reference aluminum truss beam. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Trusses

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