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FGAHOI: Fine-Grained Anchors for Human-Object Interaction detection

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arXiv

arXiv 2023年

作者： Ma, Shuailei Wang, Yuefeng Wang, Shanze Wei, Ying College of Information Science and Engineering Northeastern University Shenyang110819 China Changsha Hisense Intelligent System Research Institute Co. Ltd. and Information Technology R&D Innovation Center of Peking University Shaoxing China

Human-Object Interaction (HOI), as an important problem in computer vision, requires locating the human-object pair and identifying the interactive relationships between them. The HOI instance has a greater span in spatial, scale, and task than the individual object instance, making its detection more susceptible to noisy backgrounds. To alleviate the disturbance of noisy backgrounds on HOI detection, it is necessary to consider the input image information to generate fine-grained anchors which are then leveraged to guide the detection of HOI instances. However, it is challenging for the following reasons. i) how to extract pivotal features from the images with complex background information is still an open question. ii) how to semantically align the extracted features and query embeddings is also a difficult issue. In this paper, a novel end-to-end transformer-based framework (FGAHOI) is proposed to alleviate the above problems. FGAHOI comprises three dedicated components namely, multi-scale sampling (MSS), hierarchical spatial-aware merging (HSAM) and task-aware merging mechanism (TAM). MSS extracts features of humans, objects and interaction areas from noisy backgrounds for HOI instances of various scales. HSAM and TAM semantically align and merge the extracted features and query embeddings in the hierarchical spatial and task perspectives in turn. In the meanwhile, a novel training strategy Stage-wise Training Strategy is designed to reduce the training pressure caused by overly complex tasks done by FGAHOI. In addition, we propose two ways to measure the difficulty of HOI detection and a novel dataset, i.e., HOI-SdC for the two challenges (Uneven distributed Area in Human-Object Pairs and Long distance Visual Modeling of Human-Object Pairs) of HOI instances detection. Experiments are conducted on three benchmarks: HICO-dET, HOI-SdC and V-COCO. Our model outperforms the state-of-the-art HOI detection methods, and the extensive ablations reveal the merits of our

关键词： Anchors

Microstructural features and mechanical properties of 22MnB5 hot stamping steel in different heat treatment conditions

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JOUrNAL OF MATErIALS rESEArCH ANd technology-JMr&T 2020年第5期9卷 10901-10908页

作者： Cavusoglu, Onur Cavusoglu, Oktay Yilmazoglu, Ahmet Gurkan Uzel, Ugur Aydin, Hakan Gural, Ahmet Gazi University Faculty of Technology Department of Manufacturing Engineering Ankara Turkey TOFAŞ Turkish Automobile Factory R&D Center Bursa Turkey Bursa Uludağ University Faculty of Engineering Department of Mechanical Engineering Bursa Turkey Gazi University Faculty of Technology Department of Metallurgical and Materials Engineering Ankara Turkey

In this study, the microstructure and mechanical properties of the 22MnB5 steel sheet wereinvestigated in different heat treatment conditions. The steel sheet heated to 700 degrees C, 800 degrees C, and 900 degrees C was subjected to air cooling, water quenching, and water quenching + temperingprocedures. Microstructural properties post-heat treatment were analyzed under an opticalmicroscope. To determine the mechanical properties, uniaxial tensile tests, and hardnessmeasurements were performed. The highest mechanical properties were achieved with thewater quenching from 800 degrees C and 900 degrees C. The elongation value was ranged of 2-4% with thewater quenching. Also, the tempering process slightly increased the elongation value. (C) 2020 The Author(s). Published by Elsevier B.V.

关键词： Hot stamping 22MnB5 Heat treatment Quenching Mechanical properties

Analysis of Internal Flow Characteristics of Squirrel-Cage Fan with Multi-directional Air Intake Impeller

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SSrN 2023年

作者： Zhou, Hao Wang, Wei Jiang, Boyan Wang, Jun School of Energy and Power Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China Guangdong Sunwill Precision Plastic Co. Ltd. Basic Research of R&D Center Guangdong Foshan528305 China

The separate flow in the inlet region of the squirrel-cage fan, caused by airflow steering, hindered the further improvement of internal flow state and aerodynamic performance. This study proposed a multi-directional air intake design of the impeller to solve this problem. Specifically, a new parameter known as d* was introduced in this study to represent the axial air intake parameter of the impeller. Subsequently, the key parameters of the multi-directional air intake impeller (d*, entrance blade angle, exit blade angle) were optimally designed using an orthogonal experimental and CFd numerical simulation. These results were further validated through experimentation, demonstrating that a well-designed multi-directional air intake impeller could increase the fan's air volume, total pressure, and total efficiency by 27.3%, 12.6%, and 5.5%, respectively. Furthermore, it had been observed that the inclusion of an axial air intake in the impeller diminished the impact of the entrance blade angle on fan efficiency. When evaluating various radial parameters of the impeller, as well as different-sized models, the influence of the axial dimensionless parameter d* on the fan total efficiency showed a consistent pattern, which was important to note that the efficiency did not necessarily increase with higher values of d*, instead, the fan efficiency peaks when d* was approximately 0.5. The analysis of the flow field and entropy generation inside the fan revealed that the design could weaken the separation vortex at the inlet and shift the position of vortex core towards the impeller's leading edge, so as to eclectically enhance the uniformity of the impeller inlet and outlet, ultimately optimizing the aerodynamic characteristics within the fan. This study presented a novel approach to controlling the inlet separation flow of a squirrel-cage fan and provided a reference to elucidate the mechanism of internal flow evolution with the multi-directional air intake impeller. © 202

关键词： Air intakes

Lamellar Structured Go-Melamine Nanocomposite Membranes with Varying d-Spacing for Efficient Organic Solvent Nanofiltration (Osn)

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SSrN 2023年

作者： Hung, Wei-Song Abebe, Shalligito Habetamu Subrahmanya, T.M. Austria, Hannah Faye M. Nayak, Smrutiranjan Setiawan, Owen Huang, Tsung-Han Hu, Chien-Chieh Lee, Kueir-rarn Lai, Juin-Yih Advanced membrane materials research center Graduate Institute of Applied science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan R&D Center for Membrane Technology Chung Yuan University Chung-Li32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan32023 Taiwan

There is a lot of research being done on GO lamellar 2d membranes for separating organic solvents and dyes. These membranes are highly sought-after due to their exceptional characteristics. However, existing challenges include inadequate solvent permeability and limited dye rejection capacity due to swelling of membranes. In this study, we proposed a novel technique that employs low-pressure assisted filtration to fabricate nanocomposite membranes using GO and melamine. remarkably, these composite membranes exhibited outstanding separation performance for dyes (≥99.06 %) in organic solvents, regardless of their positive or negative charges or when present in mixtures. The optimum GO-M0.02 nanocomposite membrane exhibits impressive organic solvent flux, attaining a value as high as 50.8 L/m2h (acetone), which is 6.57 times greater than that of the pure GO membrane. Furthermore, these GO-Melamine nanocomposite membranes showed excellent durability against both common and harsh organic solvents, and the flux of solvents through the GO-M0.02 nanocomposite membrane remained almost unchanged even after being immersed in methanol for up to one week. Additionally, the membrane exhibited consistent solvent flux and rejection rates for methyl green during continuous filtration. These results highlight the exceptional stability and immense potential of GO-melamine nanocomposite membranes for real organic solvent nanofiltration. © 2023, The Authors. All rights reserved.

关键词： Nanofiltration

Investigation of space group effects of High-Voltage spinel LiNi0.5Mn1.5O4: Unveiling the influences of fluorinate benzimidazole salt additive

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Chemical engineering Journal 2024年 494卷

作者： Khotimah, Chusnul Yuwono, rio Akbar Wang, Fu-Ming Yang, Chun-Chen Wu, Nae-Lih dewi Sundari, Citra deliana Imawan, Arif Cahyo Chang, Ching-Kai Hsu, Ping-Hsuan Huang, Pin-Cheng Liu, Guan-Yi Tsai, Yi-de Haw, Shu-Chih Iskandar, Ferry Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei Taiwan Graduate Institute of Energy and Sustainability Technology National Taiwan University of Science and Technology Taipei Taiwan Department of Chemical Engineering Chung Yuan Christian University Taoyuan Taiwan R&D Center for Membrane Technology Chung Yuan Christian University Taoyuan Taiwan Department of Chemical Engineering Ming-Chi University of Technology New Taipei City Taiwan Department of Chemical Engineering National Taiwan University Taipei Taiwan Department of Chemistry Education UIN Sunan Gunung Djati Bandung Bandung Indonesia National Synchrotron Radiation Research Center Hsinchu Taiwan Research Center of Nanoscience and Nanotechnology Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia

Spinel LiNi0.5Mn1.5O4 (LNMO) is one of the attractive cathodes due to several advantages such as Co-free for low cost and high operating voltage (∼5 V). Normally, there are Fd3¯m and P4332 space group types of LNMOs. However, both LNMOs suffer phase segregation at intragranular side which affects the lithium diffusion pathway and structural degradation during cycles. On the other hand, Jahn-Teller distortion on Mn3+ as well as HF effects from electrolyte oxidation at high voltage window triggered lead Mn dissolution from LNMO that causes performance fade. In this work, a new salt is developed, lithium 1-fluoro benzimidazole (Li-1FB) for LNMO with two different space groups. Ex-situ Xrd results show the Li-1FB postpones the formation of intermediate phase transition on both LNMOs at different states of charge. In addition, 1H NMr analysis reveals the Li-1FB salt can prevent HF formation by the N-Li functional group of imidazole ring thus inhibits Mn dissolution on both LNMOs after cycling. Furthermore, the Li-1FB salt is suitable to improve cycle performance of both LNMOs in half-cell (Li metal as anode) and full cell (graphite as anode) applications. This new salt provides dramatic improvements, and it is suitable for further high-energy applications. © 2024

关键词： Lithium

2d MoS_(2) Helical Liquid Crystalline Fibers for Multifunctional Wearable Sensors

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Advanced Fiber Materials 2024年第6期6卷 1813-1824页

作者： Jun Hyun Park Jang Hwan Kim Su Eon Lee Hyokyeong Kim Heo Yeon Lim Ji Sung Park Taeyeong Yun Jinyong Lee Simon Kim Ho Jun Jin Kyeong Jun Park Heemin Kang Hoe Joon Kim Hyeong Min Jin Jiwoong Kim Sang Ouk Kim Bong Hoon Kim Department of Robotics and Mechatronics Engineering DGISTDaegu 42988Republic of Korea Present Address:Platform Technology R&D Center LG ChemistrySeoul 07795Republic of Korea Department of Materials Science and Engineering Soongsil UniversitySeoul 06978Republic of Korea Department of Organic Materials and Fiber Engineering Soongsil UniversitySeoul 06978Republic of Korea Nano Convergence Technology Research Center Korea Electronics Technology Institute(KETI)Gyeonggi‑do 13509Republic of Korea Department of Green Chemistry and Materials Engineering Soongsil UniversitySeoul 06978Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea Department of Materials Science and Engineering National Creative Research Initiative Center for Multi‑Dimensional Directed Nanoscale AssemblyKAIST Institute for NanocenturyKAISTDaejeon 34141Republic of Korea Department of Organic Materials Engineering Chungnam National UniversityDaejeon 34134Republic of Korea Department of Materials Science and Engineering Chungnam National University99 Daehak‑roYuseong‑guDaejeon 34134Republic of Korea

Fiber-based material systems are emerging as key elements for next-generation wearable devices due to their remarkable advantages,including large mechanical deformability,breathability,and high ***,greatly improved mechani-cal stability has been established in functional fiber systems by introducing atomic-thick two-dimensional(2d)*** development of intelligent fibers that can respond to various external stimuli is strongly needed for versatile *** this work,helical-shaped semiconductive fibers capable of multifunctional sensing are obtained by wet-spinning MoS_(2) liquid crystal(LC)*** mechanical properties of the MoS_(2) fibers were improved by exploiting high-purity LC dispersions consisting of uniformly-sized MoS_(2) ***,three-dimensional(3d)helical fibers with structural chirality were successfully constructed by controlling the wet-spinning process *** helical fibers exhibited multifunctional sensing characteristics,including(1)photodetection,(2)pH monitoring,(3)gas detection,and(4)3d strain sensing.2d materials with semiconducting properties as well as abundant surface reactive sites enable smart multifunctionalities in one-dimensional(1d)and helical fiber geometry,which is potentially useful for diverse applications such as wearable internet of things(IoT)devices and soft robotics.

关键词： Molybdenum disulfide(MoS_(2)) Liquid crystal(LC) Two-dimensional(2d)material Sensor Fiber

Enhancement of Quality and in Vitro Starch digestibility for Fried-Free Instant Noodles with rapid rehydration Using Sourdough Fermented by Exopolysaccharide-Producing Weissella Confusa

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SSrN 2024年

作者： Ji, Shengxin Li, Huipin Ai, Zhilu Li, Zhen Suo, Biao Fan, Minghui Yang, Yong College of Food Science and Technology Henan Agricultural University Zhengzhou450002 China Key Laboratory of Staple Grain Processing Ministry of Agriculture and Rural Affairs Zhengzhou450002 China National R&D Center for Frozen Rice & Wheat Products Processing Technology Zhengzhou450002 China Henan Engineering Research Center of Cold-Chain Food Zhengzhou450002 China

Fried-free instant noodles (FFNs) are associated with difficulty in rehydration and high cooking loss. In this study, the effect of sourdough fermented by exopolysaccharide (EPS)-producing Weissella confusa on the rehydration property, cooking qualities, and in vitro starch digestibility of FFNs and the improvement mechanisms were illustrated. The utilization of W. confusa fermented sourdough supplemented with 2% sucrose (Sd-Sucrose2) significantly improved the rehydration property, cooking qualities, and in vitro starch digestibility of FFNs. Compared with the control group, the rehydration time of FFNs prepared by Sd-Sucrose2 was reduced by 17.36% from 403 to 333 s, the cooking loss was decreased by 12.72%, and the digestible starch content was increased by 5.40%. The fermentation with W. confusa, which created acidic environment and produced EPS with strong hydrophilicity, significantly enhanced the rehydration property and cooking qualities of FFNs through improving the degree of gelatinization and reducing the relative crystallinity. © 2024, The Authors. All rights reserved.

关键词： Starch

Enhancement of the Corrosion Properties of Selective Laser Melted Co-Cr-Mo Alloy by Selective Oxidation Annealing

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SSrN 2022年

作者： Im, Hyeon-Tae Kim, dae Ha Kim, Young do Seo, Bosung Park, Jae-Young Park, Ki Beom Lee, da Hye Mo, Chan Bin Park, Kwangsuk Park, Hyung-Ki Functional Materials and Components R&D Group Korea Institute of Industrial Technology Gangneung25440 Korea Republic of Division of Materials Science and Engineering Hanyang University Seoul04763 Korea Republic of KONASOL R&D center KONASOL Dangjin31806 Korea Republic of

This study investigated the surface modification effect of the selective oxidation annealing (SOA) on the corrosion properties of cobalt-chromium-molybdenum (Co-Cr-Mo) alloy fabricated by selective laser melting (SLM). For the SOA, each element’s oxidation driving force was calculated, and the condition in which only Cr was selectively oxidized was thermodynamically analyzed. The oxidation potential was controlled by the partial pressure ratio of hydrogen gas and water vapor, and the alloy samples were annealed following the condition of the selective oxidation of Cr. The changes in the oxide layer and corrosion properties according to the SOA time were examined. On the as-built sample’s surface, a very thin native oxide film was formed. After the SOA, a dense chromium oxide (Cr 2 O 3 ) layer was formed on the surface, and its thickness increased along with the SOA time. These changes in the oxide layer had an impact on corrosion properties. Even though all samples before and after the SOA were under the passivation state, the corrosion performances in terms of corrosion potential and corrosion current density were improved by the SOA. The electrochemical impedance spectroscopy (EIS) results further confirmed that the improved corrosion resistance mainly came from the increased oxide layer resistance (r o ) because of the thickened oxide layer. © 2022, The Authors. All rights reserved.

关键词： Electrochemical impedance spectroscopy

Comprehensive Assessment of the Environmental Impact of Fused Filament Fabrication Products Produced Under Various Performance requirements

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Journal of The Institution of Engineers (India): Series C 2021年第1期102卷 59-73页

作者： Ma, Haopeng Zhang, Yixuan Jiao, Zhiwei Yang, Weimin He, Xuetao Xie, Guanghui Li, Haoyi College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing100029 China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing100029 China College of Agronomy and Biotechnology China Agricultural University Beijing100094 China National Energy R&D Center for Biomass China Agricultural University Beijing100094 China

Fused filament fabrication (FFF) is one of the most commonly used 3d printing technologies and has gradually become an important plastic processing technology. However, due to the variety of performance and application scenarios of FFF products, there is no research to comprehensively evaluate the environmental impact of the process. The environmental impact assessment method of FFF products under different performance requirements was proposed innovatively. Through the assessment, we found that the life cycle environmental impact of FFF products produced under various performance requirements can be up to several times different from each other and the FFF process can best reflect its environmentally friendly characteristics when manufacturing products do not require high strength and high surface quality. This paper aims to propose the rational application scenario and the positive solutions to reduce environmental impact for FFF, meanwhile provide future directions for the sustainable development of the FFF technology. © 2020, The Institution of Engineers (India).

关键词： Life cycle