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ACS Sustainable Resource Management 2024年第11期1卷 2334-2337页

作者： Haihui Pu Jinrui Zhang Chao Liang Mark C. Hersam Stuart J. Rowan Wei Chen Santanu Chaudhuri Elizabeth A. Ainsworth DoKyoung Lee Jonathan Claussen Yuxin Chen Rebecca Willett Jennifer B. Dunn Junhong Chen Pritzker School of Molecular Engineering University of Chicago Chicago Illinois 60637 United States Chemical Sciences and Engineering Division Physical Sciences and Engineering Directorate Argonne National Laboratory Lemont Illinois 60439 United States Department of Chemical and Biological Engineering Northwestern University Evanston Illinois 60208 United States Institute for Sustainability and Energy at Northwestern Northwestern University Evanston Illinois 60208 United States Department of Materials Science and Engineering Department of Chemistry and Department of Electrical and Computer Engineering Northwestern University Evanston Illinois 60208 United States Department of Chemistry University of Chicago Chicago Illinois 60637 United States Department of Mechanical Engineering Northwestern University 2145 Sheridan Road Evanston Illinois 60208 United States Department of Civil Materials and Environmental Engineering Chemical Engineering and Department of Chemistry University of Illinois Chicago Chicago Illinois 60439 United States USDA Agricultural Research Service Global Change and Photosynthesis Research Unit Urbana Illinois 61801 United States Department of Crop Sciences and Institute for Sustainability Energy & Environment University of Illinois at Urbana-Champaign Champaign Illinois 61801 United States Department of Mechanical Engineering Iowa State University Ames Iowa 50011 United States Department of Computer Science University of Chicago Chicago Illinois 60637 United States Department of Statistics University of Chicago Chicago Illinois 60637 United States

Adopting a holistic approach to manufacturing that strikes a balance between economic, ecological, and social viability and well-being has the potential to address the grand challenge of climate ch...

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Review and outlook of aluminum matrix composites 4th

Review and outlook of aluminum matrix composites

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4th International Seminar on Advances in materials science and engineering, ISAMSE 2019

作者： Wanbo, Zhu Zhenggui, Zhang Haonan, Chen Tie, Xiao Department of Materials Science School of Mechanical Engineering Shenyang University China

ISBN: (纸本)9783035716290

In the past 20 years, the development of aluminum matrix composites (AMCs) has made a qualitative leap. This article comprehensively introduces the performance characteristics and the preparation methods of aluminum matrix composites. The powder metallurgy method (P/M) is elaborated in detail. And the applications of aluminum matrix composites in aerospace, automobile and other fields are described. Finally, the future development of aluminum matrix composites is prospected. © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Aluminum

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Bluetooth Based Home Automation Using Android Phone

Bluetooth Based Home Automation Using Android Phone

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Sustainable Emerging Innovations in engineering and Technology (ICSEIET), International Conference on

作者： Priyanka Bhardwaj Manidipa Roy Sanjay Kumar Singh Vanshika Jain Mega Novita Agus Mukhtar Yuris Setyoadi ABES Engineering College Ghaziabad U.P India Postgraduate Program of Science Education Universitas PGRI Semarang Semarang Central Java Indonesia Department of Mechanical Engineering Faculty of Engineering and Informatics Universitas PGRI Semarang Semarang Central Java Indonesia

Electronic devices and appliances are increasingly becoming a quintessential part of every household with the recent development and innovations in the field of technology affecting the day-to-day lives of individuals. Automation has caught the fame as people struggle to keep up with the demands of work, making it an easy solution to operate devices and machines to meet the individual needs. The paper describes the creation and execution of an affordable, versatile, and safe home automation system that is controlled through a mobile phone. The system relies on an independent Arduino BT board, which is connected to home appliances via relays attached to its input/output ports. Wireless communication is used to connect the mobile phone and the Arduino BT board. The system is designed to be both economical and expandable, allowing for control of a range of devices with minimal changes to its basic structure. The focus of the paper is to explain how to manage and regulate electronic devices using Android smartphones. The paper also outlines a home automation system that prioritizes security and safeguards user privacy. This system is designed to be affordable and flexible, making it possible to control various devices with minimalchanges to its core structure. Additionally, the appliances in the system are protected by passwords to ensure that only authorized users can access them.

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Quantitative Investigation on the {10-12} Twinning-Detwinning Behavior and Twin Transfer of an Extruded Mg-2.8y Sheet During Compression-Tension Loading Via Quasi-in-Situ Ebsd Observation

SSRN

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SSRN 2023年

作者： Li, Tianjiao Zheng, Jiang Gupta, Manoj He, Liuyong Xia, Lihong Jiang, Bin College of Materials Science and Engineering Chongqing University Chongqing400044 China Department of Mechanical Engineering National University of Singapore Singapore117578 Singapore Shenyang National Laboratory for Materials Science Chongqing University Chongqing400044 China College of Mechanical Engineering Chongqing Technology and Business University Chongqing400067 China National Engineering Research Center for Magnesium Alloys Chongqing University Chongqing400044 China 174 Shazheng Street Shapingba District Chongqing China

Abundant {10-12} twins appeared in an extruded Mg-2.8Y (wt. %) sheet with rare-earth (RE) texture under compression along the transverse direction (TD). Twinning-detwinning behavior during compression-tension loading was quantitatively investigated via quasi-in-situ EBSD observation. The evolution of deformation mechanisms was quantitatively studied by calculation of the plastic strain fraction of twinning, detwinning, and dislocation slip. Twining and detwinning were the dominant deformation modes in compression and reverse tension, respectively, owing to their relatively higher Schmid factor (SF) and lowest activation stress (τ). Twin variants with SF ranking 1st and 2nd were activated preferentially while detwinning with low SF ranking showed high activation. The impact of texture and load path on variant selection was systematically discussed. Moreover, short twin chains only passing through two or three grains caused by twin transfer were observed. Grain boundary misorientation angle (GBMA) and geometric compatibility factor (m’) were introduced to analyze the crystallographic characteristics of twin transfer. GBMA ≤ 34.5° or m’ ≥ 0.80 is a necessary condition for most twin transfer events. RE texture as well as the nearly uniform distribution of GBMA gave rise to short twin chains and restricted the formation of long twin bands. The relationship between GBMA and m’ was also discussed. © 2023, The Authors. All rights reserved.

关键词： Textures

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Correction: Integrated adsorption and photocatalytic degradation of VOCs using a TiO 2 /diatomite composite: effects of relative humidity and reaction atmosphere

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Catalysis science & Technology 2024年第1期15卷 219-220页

作者： Guangxin Zhang Arman Peyravi Zaher Hashisho Zhiming Sun Yangyu Liu Shuilin Zheng Lexuan Zhong School of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 PR China gxzhang2019@*** School of Chemical and Environmental Engineering China University of Mining & Technology (Beijing) Beijing 100083 PR China zhimingsun@*** Department of Civil and Environmental Engineering University of Alberta Edmonton AB T6G 2W2 Canada hashisho@ualberta.ca Department of Mechanical Engineering University of Alberta Edmonton AB T6G 1H9 Canada

Correction for ‘Integrated adsorption and photocatalytic degradation of VOCs using a TiO 2 /diatomite composite: effects of relative humidity and reaction atmosphere’ by Guangxin Zhang et al., Catal. Sci. Technol. ,...

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ORIENTATION RECONSTRUCTION OF TRANSFORMATION α TITANIUM ALLOYS VIA POLARIZED LIGHT MICROSCOPY: METHODOLOGY AND ASSESSMENT

arXiv

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arXiv 2024年

作者： Singh, Amit Obstalecki, Mark Pagan, Darren C. Glavicic, Michael Kasemer, Matthew Department of Mechanical Engineering The University of Alabama TuscaloosaAL35487 United States Air Force Research Laboratory Materials and Manufacturing Directorate Wright Patterson AFB OH45433 United States Department of Materials Science and Engineering The Pennsylvania State University University ParkPA16802 United States Rolls-Royce Corporation IndianapolisIN46225 United States

Emerging microstructural characterization methods have received increased attention owing to their promise of relatively inexpensive and rapid measurement of polycrystalline surface morphology and crystallographic orientations. Among these nascent methods, polarized light microscopy (PLM) is attractive for characterizing alloys comprised of hexagonal crystals, but is hindered by its inability to measure complete crystal orientations. In this study, we explore the potential to reconstruct quasi-deterministic orientations for titanium microstructures characterized via PLM by considering the Burgers orientation relationship between the room temperature α (HCP) phase fibers measured via PLM, and the β (BCC) phase orientations of the parent grains present above the transus temperature. We describe this method—which is capable of narrowing down the orientations to one of four possibilities—and demonstrate its abilities on idealized computational samples in which the parent β microstructure is fully, unambiguously known. We further utilize this method to inform the instantiation of samples for crystal plasticity simulations, and demonstrate the significant improvement in deformation field predictions when utilizing this reconstruction method compared to using results from traditional PLM. © 2024, CC BY-NC-ND.

关键词： Titanium alloys

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Human Perception-Inspired Grain Segmentation Refinement Using Conditional Random Fields

arXiv

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arXiv 2023年

作者： Aksoy, Doruk Xin, Huolin L. Rupert, Timothy J. Bowman, William J. Department of Materials Science and Engineering University of California IrvineCA92697 United States Department of Physics and Astronomy University of California IrvineCA92697 United States Department of Mechanical and Aerospace Engineering University of California IrvineCA92697 United States

Accurate segmentation of interconnected line networks, such as grain boundaries in polycrystalline material microstructures, poses a significant challenge due to the fragmented masks produced by conventional computer vision algorithms, including convolutional neural networks. These algorithms struggle with thin masks, often necessitating intricate post-processing for effective contour closure and continuity. Addressing this issue, this paper introduces a fast, high-fidelity post-processing technique, leveraging domain knowledge about grain boundary connectivity and employing conditional random fields and perceptual grouping rules. This approach significantly enhances segmentation mask accuracy, achieving a 79% segment identification accuracy in validation with a U-Net model on electron microscopy images of a polycrystalline oxide. Additionally, a novel grain alignment metric is introduced, showing a 51% improvement in grain alignment, providing a more detailed assessment of segmentation performance for complex microstructures. This method not only enables rapid and accurate segmentation but also facilitates an unprecedented level of data analysis, significantly improving the statistical representation of grain boundary networks, making it suitable for a range of disciplines where precise segmentation of interconnected line networks is essential. Copyright © 2023, The Authors. All rights reserved.

关键词： Microstructure

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Nanograins on Ti-25Nb-3Mo-2Sn-3Zr alloy facilitate fabricating biological surface through dual-ion implantation to concurrently modulate the osteogenic functions of mesenchymal stem cells and kill bacteria

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Journal of materials science & Technology 2021年第14期73卷 31-44页

作者： Run Huang Lei Liu Bo Li Liang Qin Lei Huang Kelvin W.K.Yeung Yong Han School of Materials Science and Engineering Anhui University of Science and TechnologyHuainan232001China Department of Orthopaedics and Traumatology The University of Hong KongHong KongChina State-key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi'an710049China Department of Gastrointestinal Surgery Hubei Cancer HospitalWuhan430060China Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma The University of Hong Kong Shenzhen HospitalShenzhen518053China

Surface mechanical attrition treatment(SMAT)method is an effective way to generate nanograined(NG)surface on Ti-25 Nb-3 Mo-2 Sn-3 Zr(wt.%)(named as TLM),a kind ofβ-type titanium alloy,and the achieved nanocrystalline surface was proved to promote positive functions of osteoblastic *** this work,to further endow the NG TLM alloy with both good osteogenic and antibacterial properties,magnesium(Mg),silver(Ag)ion or both were introduced onto the NG TLM surface by ion implantation process,as a comparison,the Mg and Ag ions were also co-implanted onto coarsegrained(CG)TLM *** obtained results show that subsequent ion implantation does not remarkably induce the surface roughness and topography alteration of the SMAT-treated layers,and it also has little impact on the microstructure of the SMAT-derivedβ-Ti *** addition,the implanted Mg and Ag ions are observed to exist as MgO and metallic Ag na noparticles(NPs)embedding tightly in theβ-Ti matrix with grain size of about 15 and 7 nm,*** cell adhesion and functions(including proliferation,osteo-differentiation and extracellular matrix mineralization)of rabbit bone marrow mesenchymal stem cells(rBMMSCs)and the bacterial colonization of Staphylococcus aureus(***)on the different surfaces were *** in-vitro experimental results reveal that the Mg and Ag single-ion implanted NG surface either significantly promotes the rBMMSCs response or inhibits the growth ***,whereas the Mg/Ag coimplanted NG surface could concurrently enhance the rBMMSCs functions as well as inhibit the bacterial growth compared to the NG surface,and this efficacy is more pronounced as compared to the Mg/Ag co-implantation in the CG *** SMAT-achieved nanograins in the TLM surface layer are identified to not only play a leading role in determining the fate of rBMMSCs but also facilitate fabricating dualfunctio nal surface with both good osteogenic and antibacterial activities through co-imp

关键词： β-Type titanium Nanograined surface Ion implantation Stem cells Antibacterial property

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Multifunctional Wound Dressing Patch for Advanced Wound Care

Multifunctional Wound Dressing Patch for Advanced Wound Care

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International Conference on Solid State Sensors and Actuators (TRANSDUCERS)

作者： Ji-Hwan Ha Junseong Ahn Yongrok Jeong Byeongmin Kang Jun-Ho Jeong Inkyu Park Department of Mechanical Engineering Korea Advanced Institute of Science and Technology Daejeon Republic of Korea Department of Nano-Manufacturing Technology Korea Institute of Machinery and Materials Daejeon Korea Korea Advanced Institute of Science and Technology (KAIST)

In this study, we developed a multifunctional wound dressing patch (MWDP) that helps to heal, protect, and monitor the wounds. The MWDP was fabricated by combining two layers namely wound healing support (WHS) layer and wound protection/monitoring (WP/M) layer. Each layer comprised micro- and nano-fibers fabricated via electrospinning. The WHS layer consisted of hyaluronic acid (HA), gelatin (GE), and dexpanthenol (DP), and designed to swifter heal the wound by each components: they can help to regeneration of extracellular matrix (ECM) and fibroblast cell. Furthermore, the WP/M layer consisted of curcumin-contained polycaprolactone (C-PCL), and designed to protect and monitor the wound: C-PCL protects the wound against microbial influence. C-PCL mange wound state, by monitoring pH of wound lesion by color change. The synergy of these functions shows swift wound healing results (in 12 days), superior antimicrobial properties, and wound monitoring for advanced wound care. The multifunctional wound dressing patch is expected to promote wound healing and to monitor wound state, facilitating convenient wound management for the patients.

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Learning of Nash Equilibria in Risk-Averse Games

arXiv

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arXiv 2024年

作者： Wang, Zifan Shen, Yi Zavlanos, Michael M. Johansson, Karl H. Division of Decision and Control Systems School of Electrical Enginnering and Computer Science KTH Royal Institute of Technology Digital Futures StockholmSE-10044 Sweden The Department of Mechanical Engineering and Materials Science Duke University DurhamNC United States

This paper considers risk-averse learning in convex games involving multiple agents that aim to minimize their individual risk of incurring significantly high costs. Specifically, the agents adopt the conditional value at risk (CVaR) as a risk measure with possibly different risk levels. To solve this problem, we propose a first-order risk-averse leaning algorithm, in which the CVaR gradient estimate depends on an estimate of the Value at Risk (VaR) value combined with the gradient of the stochastic cost function. Although estimation of the CVaR gradients using finitely many samples is generally biased, we show that the accumulated error of the CVaR gradient estimates is bounded with high probability. Moreover, assuming that the risk-averse game is strongly monotone, we show that the proposed algorithm converges to the risk-averse Nash equilibrium. We present numerical experiments on a Cournot game example to illustrate the performance of the proposed method. Copyright © 2024, The Authors. All rights reserved.

关键词： Risk assessment

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