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Portable FBAR based E-nose for cold chain real-time bananas shelf time detection

Nanotechnology and Precision Engineering 2023年第1期6卷 32-39页

作者： Chen Wu Jiuyan Li Frontier Science Center for Smart Materials College of Chemical EngineeringDalian University of TechnologyDalian 116024China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai Economic and Technological Development Zone300 Changjiang RoadYantaiChina

Being cheap,nondestructive,and easy to use,gas sensors play important roles in the food ***,most gas sensors are suitable more for laboratory-quality fast testing rather than for cold-chain continuous and cumulative ***,an ideal electronic nose(E-nose)in a cold chain should be stable to its surroundings and remain highly accurate and *** this work,a portable film bulk acoustic resonator(FBAR)-based E-nose was built for real-time measurement of banana shelf *** sensor chamber to contain the portable circuit of the E-nose is as small as a smartphone,and by introducing an air-tight FBAR as a reference,the E-nose can avoid most of the drift caused by *** the help of porous layer by layer(LBL)coating of the FBAR,the sensitivity of the E-nose is 5 ppm to ethylene and 0.5 ppm to isoamyl acetate and isoamyl butyrate,while the detection range is large enough to cover a relative humidity of *** this regard,the E-nose can easily discriminate between yellow bananas with green necks and entirely yellow bananas while allowing the bananas to maintain their biological activities in their normal storage state,thereby showing the possibility of real-time shelf time *** portable FBAR-based E-nose has a large testing scale,high sensitivity,good humidity tolerance,and low frequency drift to its surroundings,thereby meeting the needs of cold-chain usage.

关键词： Film bulk acoustic resonator(FBAR) Portable E-nose Real-time detection Layer by layer

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Unravelling precipitation behavior and mechanical properties of Al-Zn-Mg-Cu alloy

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Journal of Materials Science & technology 2025年第1期204卷 177-189页

作者： Sang-Hwa Lee Tae-Young Ahn Sung-Il Baik David NSeidman Seok-Jae Lee Young-Kook Lee Kwangjun Euh Jae-Gil Jung Division of Advanced Materials Engineering Jeonbuk National UniversityJeonju54896Republic of Korea Advanced Metals Division Korea Institute of Materials ScienceChangwon51508Republic of Korea Department of Materials Science and Engineering Yonsei UniversitySeoul03722Republic of Korea Materials Safety Research Division Korea Atomic Energy Research InstituteDaejeon34057Republic of Korea Department of Materials Science and Engineering Northwestern UniversityEvanstonIL60208USA Northwestern University Center for Atom-probe Tomography EvanstonIL60208USA Research Center for Advanced Materials Development Jeonbuk National UniversityJeonju54896Republic of Korea Graduate Institute of Ferrous&Eco Materials Technology Pohang University of Science and TechnologyPohang37673Republic of Korea

We investigate the effect of aging temperature on precipitation behavior and mechanical properties of an Al-7.6Zn-2.7Mg-2.0Cu-0.1Zr-0.07Ti(wt.%)alloy by evaluating the matrix’s microhardness,electrical resistivity,and tensile properties:additionally,employing X-ray diffraction(XRD),differential scanning calorimetry(DSC),transmission electron microscopy(TEM),and atom-probe tomography(APT)to charac-terize this *** nanoprecipitates forming under peak-aging conditions vary with aging temperature,forming coherent GPI zones at 80℃,GPII zones with minorη’at 120-150℃,andη’/ηwith minor GP zones at 180-220℃.GPI and GPII zones forming at 80-150℃ contain similar concentrations of solute atoms(11Zn-9Mg-(<1.0)Cu(at.%)),whereas theη’/ηnanoprecipitates forming at 180℃ contain larger concentrations of solute atoms(28Zn-24Mg-3.4Cu(at.%)).The strength of the peak-aged alloy decreases with increasing aging temperature owing to the increasing size and decreasing number density of the *** peak-aging conditions,precipitation strengthening originates mainly from dislo-cation shearing at 80-150℃ and from Orowan bypassing at temperatures above 180℃.The shearable to non-shearable transition of the nanoprecipitates at 180℃ reduces the strain hardening rate,thereby decreasing the alloy’s ductility.

关键词： Aluminum alloys Precipitation Tensile properties Transmission electron microscopy Atom probe tomography

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New horizons for therapeutic applications of nanozymes in oral infection

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Particuology 2023年第9期80卷 61-73页

作者： Yanting Cai Yue Li Jin Zhang Nan Tang Xingfu Bao Zhen Liu Department of Orthodontics Jilin Provincial Key Laboratory of Tooth Development and Bone RemodelingSchool and Hospital of StomatologyJilinUniversityChangchun130021China Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Life Science and TechnologyBeijing University of ChemicalTechnologyBeijing100029China

As a category of nanomaterials with excellent catalytic efficiency,great substrate specificity,and highrecovery efficiency,nanozymes have attracted increasing attention in various biomedical ***,numbers of nanozyme-assisted strategies have been well developed for the theranostics ofvarious diseases by taking advantages of their multienzyme-like characteristics,low cost,and *** the most prevalent oral diseases,oral infection poses a global hazard to human health,andcurrent therapeutic options are insufficient to resolve all the clinical *** on their admirableactivity,nanozymes can be frequently employed in the identification and treatment of various oral infectious ***,we provide a brief review focused on the classification of nanozymes,analysesof nanozyme-based antibacterial mechanism,research progress in oral bacterial control,and representative studies of nanozyme-assisted oral inflammatory ***,major challenges andpotential opportunities regarding the use of nanozymes in oral infectious diseases are also highlightedand *** review not only summarizes the recent studies of nanozymes in oral infection butalso promotes the further development of enzyme-mimetic strategies towards various oral diseases.

关键词： Nanozymes Oral infection Antibacterial therapy Anti-inflammatory therapy

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NiMo-MMO catalyst derived from LDHs precursors toward the deep hydrogenation of pyrene

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Chinese Journal of Chemical Engineering 2024年第12期76卷 201-210页

作者： Yongliang Jia Boyang Bai Jing Wang Yueyi Wang Zheng Wang Xiaoxun Ma School of Chemical Engineering Northwest UniversityXi'an 710069China International Scientific and Technological Cooperation Base of the Ministry of Science and Technology(MOST)for Clean Utilization of Hydrocarbon Resources Xi'an 710069China Chemical Engineering Research Center of the Ministry of Education(MOE)for Advanced Use Technology of Shanbei Energy Xi'an 710069China Shaanxi Research Center of Engineering Technology for Clean Coal Conversion Xi'an 710069China Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi Xi'an 710069China College of Chemistry and Materials Science Weinan Normal UniversityWeinan 714000China

A series of Ni-based catalysts were prepared via structural topological transformation from the Ni@Al_(2)O_(3)layered double hydroxides(LDHs)precursors,and applied for the deep catalytic hydrogenation saturation of pyrene in a high-pressure *** pore structures,active species dispersion,surface morphology,amount and type of acid of the prepared catalysts were characterized by BET,XRD,SEM,TEM,XPS,SEM,NH_(3)-TPD and *** studied the influence of physicochemical properties of Ni-based catalysts on the regularity and mechanism of deep hydrogenation of ***,the synergy between Ni and Mo,and the interaction between active metals and support were discussed to further reveal the constitutive relationship during the hydrogenation reaction of *** results of the evaluation of the catalytic hydrogenation of pyrene show that the as-prepared NiMo mixed metal oxide(MMO)catalyst showed excellent catalytic activity:~95%pyrene conversion,90.12%for the selectivity of deep hydrogenation products(hexahydropyrene,decahydropyrene and hexadecahydropyrene).It was expected that the successfully preparation and utilization of NiMo-MMO catalyst could provide a theoretical basis for the design of this kind of catalysts for deep catalytic hydrogenation of polycyclic aromatic hydrocarbons(PAHs).

关键词： Ni@Al_(2)O_(3)LDHs Structural topological transformation method NiMo-MMO catalyst Pyrene deep hydrogenation

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Machine Learning-Based Classification of VOCs for Breath Analyzer Linked to Different Chronic Diseases

Machine Learning-Based Classification of VOCs for Breath Ana...

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2024 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2024

作者： Karmakar, Gairik Kar, Deblina Mondal, Monojit Tripathy, Srijeet Das Mondal, Shyamal Kumar Bhattacharyya, Tarun Kanti Indian Institute of Technology Kharagpur Department of Electronics and Electrical Communication Engineering Kharagpur India Indian Institute of Technology Kharagpur Department of Advanced Technology Development Center Kharagpur India Indian Institute of Technology Kharagpur Department of Electronics and Communication Engineering Kharagpur India

ISBN: (纸本)9798350386226

This study compares machine learning frameworks for detecting and classifying gas mixtures of ammonia, acetone, and formaldehyde using L-Ascorbic acid-reduced graphene oxide (LAA-rGO) in a Field Effect Transistor (FET) sensor optimized by gate voltage. As real-time gas monitoring becomes essential in environmental, health and industrial applications. This research addresses the identification of volatile organic compounds (VOCs) linked to chronic kidney disease, lung cancer, and diabetes. The framework leverages the enhanced properties of LAA-rGO to improve sensor sensitivity and selectivity, employing algorithms like Support Vector Machines (SVM), Naïve Bayes (NB), and Decision Tree (DT). The DT demonstrating the highest accuracy. Experimental validation confirms the framework's effectiveness in differentiating similar gases overcoming challenges like cross-sensitivity and non-linearity. Results indicate that integrating LAA-rGO with machine learning significantly boosts detection accuracy and response times, paving the way for future applications in real-time monitoring and emphasizing the benefits of combining advanced materials with data analysis for enhanced health safety and quality control. © 2024 IEEE.

关键词： Decision trees

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A Multimodal Simultaneous Interpretation Prototype: Who Said What 15

A Multimodal Simultaneous Interpretation Prototype: Who Said...

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15th Conference of the Association for Machine Translation in the Americas, AMTA 2022

作者： Wang, Xiaolin Utiyama, Masao Sumita, Eiichiro Advanced Translation Research and Development Promotion Center National Institute of Information and Communications Technology Japan

"Who said what" is essential for human users to understand video streams that have more than one speaker, but conventional simultaneous interpretation (SI) systems merely present "what was said" in the form of subtitles. Because translations unavoidably have delays and errors, users often find it difficult to trace the subtitles back to speakers. Therefore, we propose a multimodal SI system that explicitly presents users "who said what" - translation annotated with the textual tags and face icons of speakers. Speaker recognition requires heavy computation which poses a big challenge to implementing our proposed system especially given the real-time characteristics of SI. We integrate multimodal speaker recognition with online sentence-based SI to meet this challenge as follows. First, our system employs automated speech recognition and online sentence segmenter to segment video streams into video clips each of which contains one sentence. Next, our system recognizes the speaker in each video clip using active speaker detection, voice embeddings and face embeddings;in the meantime, it translates the sentence into target language in the meantime. In the end, our system presents users both the translation and the speaker of each sentence. Our method has two major merits. First, speaker recognition is performed per video clip, so GPUs can have enough input data to produce large batches and run efficiently. Second, speaker recognition is synchronized with machine translation, so no extra latency is introduced. As a result, our demo system is capable of interpreting video streams in real-time on a single desktop equipped with two Quadro RTX 4000 GPUs. In addition, we full respect the privacy of users. Our system aims at distinguishing different speakers appearing in a video stream rather than figuring out the real name or identity of speakers in the physical world. As a side merit, our system requires no prior knowledge of speakers. © AMTA 2022 - 15th Conference of the As

关键词： Speech recognition

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Human Robot Collaboration in Industrial Applications 9

Human Robot Collaboration in Industrial Applications

引用

9th International Conference on Virtual Reality, ICVR 2023

作者： Yang, Yuyi Wang, Yanzhang Cao, Yilin Zhao, Zhiyang Liu, Xinpeng Wang, Yihong Zhang, Haiyang Pan, Yushan Xi'an Jiaotong-Liverpool University School of Advanced Technology Suzhou China Hangzhou Xu Fei Net Technology Co. Ltd Research and Development Center Hangzhou China

ISBN: (纸本)9798350345810

Nowadays, in many modern factories, the transport of products and the assembly of parts are carried out by robots. These robots increase production efficiency and save labor and money. However, getting the robotic arms to correctly identify the required parts and transport the products to the right place is still a challenge. To solve this problem, we conducted a user-centered design iteratively. Ideally, the user can specify specific inputs and outputs (i.e., different colors correspond to different exits). And people are also part of the system supervision system so as to give full play to the advantages of humans compared to robots in terms of the subjective initiative. Our system solves real-world classification problems by combining the strengths of machines in repetitive tasks with humans. And use this as an experimental basis to create a questionnaire. We analyzed the questionnaire data and found that our system can better achieve classification through human-robot interaction. © 2023 IEEE.

关键词： Production efficiency

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Unveiling the roles of initial phase constituents and phase metastability in hydrogen embrittlement of TRIP-assisted VCrCoFeNi medium-entropy alloys

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材料科学技术（英文版） 2025年第4期207卷 160-176页

作者： Sang Yoon Song Dae Cheol Yang Han-Jin Kim Sang-In Lee Hyeon-Seok Do Byeong-Joo Lee Alireza Zargaran Seok Su Sohn Department of Materials Science and Engineering Korea University 02841 SeoulRepublic of Korea Green Energy Materials Research Team Hyundai Motor Company Uiwang R&D Center 16082 UiwangRepublic of Korea Institue of Advanced Technology Development Hyundai Motor Group 13529 SeongnamRepublic of Korea Department of Materials Science and Engineering Pohang University of Science and Technology 37673 PohangRepublic of Korea Graduate Institute of Ferrous & Energy Materials Technology Pohang University of Science and Technology37673 PohangRepublic of Korea

Medium-entropy alloys(MEAs)that exhibit transformation-induced plasticity(TRIP)from face-centered cubic(FCC)to body-centered cubic(BCC)are considered promising for liquid hydrogen environments due to their remarkable cryogenic ***,studies on hydrogen embrittlement(HE)in BCC-TRIP MEAs have not been conducted,although the TRIP effect and consequent BCC martensite usually deteri-orate HE *** these alloys,initial as-quenched martensite alters hydrogen diffusion and trap behavior,and deformation-induced martensitic transformation(DIMT)provides preferred crack propaga-tion sites,which critically affects HE ***,this study aims to investigate the HE behav-ior of BCC-TRIP MEAs by designing four V10Cr10Co30Fe50-xNix(x=0,1,2,and 3 at％)MEAs,adjusting both the initial phase constituent and phase metastability.A decreased Ni content leads to a reduced fraction and mechanical stability of FCC,which in turn increases HE susceptibility,as determined through electro-chemical hydrogen pre-charging and slow-strain rate tests The permeation test and thermal desorption analysis reveal that the hydrogen diffusivity and content are affected by initial BCC fraction,interconnec-tivity of BCC,and refined *** these initial phase constituents differ between the alloys with FCC-and BCC-dominant initial phase,microstructural factors affecting HE are unveiled discretely among these al-loy groups by correlation of hydrogen-induced crack behavior with hydrogen diffusion and trap *** alloys with an FCC-dominant initial phase,the initial BCC fraction and DIMT initiation rate emerge as critical factors,rather than the extent of *** BCC-dominant alloys,the primary contributor is an increase in the initial BCC fraction,rather than the extent or rate of *** unraveled roles of microstructural factors provide insights into designing HE-resistant BCC-TRIP MEAs.

关键词： Medium-entropy alloys(MEAs) Transformation-induced plasticity(TRIP) Hydrogen embrittlement Hydrogen-induced crack Hydrogen diffusion and trapping

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THE QUESTIONNAIRE SURVEY ON IMPROVING WORKABILITY OF HIGH-STRENGTH CONCRETE FOR CONSTRUCTOR

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AIJ Journal of technology and Design 2023年第71期29卷 13-18页

作者： Kajita, Hideyuki Kasai, Hiroshi Urakawa, Kazuya Kojima, Masaro ICI General Center Advanced Technology Center Maeda Corporation Japan Building Construction and Materials Group KAJIMA Technical Research Institute Kajima Corporation Japan Building Research Department Technology Centre Sato Kogyo Co. Ltd Japan Construction Material Group Construction Technology Research Dept. Research & Development Institute Takenaka Corporation Japan

High-strength concrete has been put into practical use by technological development of air-entraining and high-range water-reducing admixture and low-heat type cement, and has become widespread mainly in high-rise RC buildings. However, high-strength concrete with a low water-cement ratio and a large amount of cement has a high viscosity, so construction problems such as pumpability and finishability have emerged with its widespread use. Therefore, we conducted a questionnaire survey on the specific details of defects and how to improve them by modifying the mix-proportions, for construction problems such as transportation of high-strength concrete, placing and compaction, and finishing. © 2023 Architectural Institute of Japan. All rights reserved.

关键词： Cements

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Extending the Power-Cycling Lifetime of SiC Modules Operating at 225°C

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Journal of Japan Institute of Electronics Packaging 2023年第3期26卷 275-282页

作者： Tanaka, So Shinkai, Jiro Hozoji, Hiroshi Kato, Fumiki Ikegawa, Masato Sato, Hiroshi Kurashima, Hiromi Advanced Power Electronics Research Center National Institute of Advanced Industrial Science and Technology 16-1 Onogawa Ibaraki Tsukuba305-8569 Japan Power Device Development Division Sumitomo Electric Industries Ltd. 1-1-3 Shimaya Konohana Osaka554-0024 Japan

This paper reports on the development of a SiC power device packaging technology that extends the power-cycling lifetime to 300, 000 cycles at temperatures above 200°C, which is the criterion for high-reliability applications. By mounting a buffer layer with an adjusted coefficient of thermal expansion (CTE) less than that of SiC, the creep-fatigue of the aluminum chip electrode is suppressed and lifetimes of 472, 000 cycles at 65 to 200°C and 425, 000 cycles at 65 to 225°C are achieved. In addition, the mechanism of the lifetime extension is discussed using cross-sectional structural observation, transient thermal resistance analysis, and stress-strain simulation utilizing the finite element method. Copyright © The Japan Institute of Electronics Packaging.

关键词： Silicon carbide

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