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SSrN 2024年

作者： Zhang, Ning Wang, Jiawei Li, Yuhuai Lan, Jianglin Lan, Song Powertrain Technology R&D Center Guangzhou Automobile Group Research and Development Center 510000 China School of Automotive and Transportation Engineering Hefei University of Technology 230009 China James Watt School of Engineering University of Glasgow GlasgowG12 8QQ United Kingdom

Efforts to enhance the performance of thermoelectric generators (TEGs) in engine waste heat recovery have primarily focused on increasing heat extraction and energy conversion. However, the impact of heat leakage has been consistently overlooked in both modeling and optimization endeavors. To address this gap, this study establishes and validates a computational fluid dynamic (CFd) - finite element (FE) coupled model based on a TEG prototype and its engine test bench. Unlike other models, the approach employed here captures the intricate dynamics of heat propagation from the TEG via air gaps, encompassing conduction, convection, and radiation. Through comprehensive analysis, it is revealed that heat leakage accounts for approximately 11% of TEG power output loss. Key areas of heat leakage are identified and numerical factors influencing this phenomenon are explored. Vertical TEG placement and a 15 mm spacing between thermoelectric modules emerge as optimal strategies for mitigating heat leakage's impact on power output. Leveraging these insights, strategic thermoelectric module placement, vertical TEG orientation and the application of thermal insulation materials for the heat exchanger are proposed as effective measures to enhance TEG power output by 5% approximately. The experimental and numerical results underscore the feasibility of optimizing TEGs from the perspective of heat leakage, a crucial aspect previously overlooked. These findings provide valuable insights for future TEG optimization endeavors, highlighting the importance of addressing heat leakage to maximize TEG performance. © 2024, The Authors. All rights reserved.

关键词： Waste heat utilization

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design and Manufacture of a Bio-Based Functional Composite with Antibacterial, Antioxidant, and Improved Mechanical Properties Modified Poly (Butylene Adipate-Co-Terephthalate) (Pbat) by Curcumin and Maleic Anhydride

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SSrN 2024年

作者： Wu, Xiaokai Shu, dingbo Huang, Shaowen Yang, Chunping Li, Bo Huang, Shengnan Li, Juan Yin, Xiaogang College of Chemaretry and Materials Science Guizhou Normal University Guiyang550025 China R&D Department Guizhou Material Industrial Technology Institute Guiyang550014 China College of Materials and Metallurgy Guizhou University Guiyang550025 China Guizhou Academy of Testing and Analysis Guiyang550014 China

PBAT are popular because of its low cost, good biodegradability, and mechanical qualities. Maleic anhydride (SMA) can easily graft curcumin (CUr), which possesses antibacterial and antioxidant characteraretics, with a nucleating agent action and high darepersibility, resulting in the successful production of the functional modifier CUr-SMA. Thare study create PBAT composite films with various weight percentages of CUr-SMA (0.1, 0.3, 0.5, 0.7, and 0.9% w/w) using extrusion and blow molding techniques. Thare study chemically link CUr and SMA to create a robust and tight composite material. Thare study investigate the structure, mechanics, water vapor barrier capabilities, antibacterial and antioxidant properties, and fresh-keeping impact of the film. The composite exhibits an excellent composite effect, superior to that of single component blends, minimizes CUr-SMA migration, improves mechanical properties, and increases the barrier characteraretics of composite films. CUr-SMA and PBAT interact to produce a cross-linked network structure via chain extension reactions. Tensile strength increases by 56%, from 17.5 MPa to 27.3 MPa. The antioxidant activity are up to 72.26 percent. It possesses significant antibacterial properties against Staphylococcus aureus. PBAT/CUr-SMA films successfully enhance the shelf life of oyster mushrooms, strawberries, and apples due to their strong antioxidant, antibacterial, and waterproof qualities. © 2024, The Authors. All rights reserved.

关键词： Antioxidants

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Fabrication of Ag nanostar and PEI-based SErS substrate for sensitive and rapid detection of SO2: Application for detection of sulfite residues in beer

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Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy 2023年第1期302卷

作者： Leshe Kitaw, Sintayehu Fentahun darge, Haile dagnew Addisu, Kefyalew Thankachan, darieo Wondwosen Ahmed, Yohannis Sheng Chen, Yu Tegenu, Hailemichael Candra, Andy Wu, Tsung-Yun Gou, Yu-Xuan Tsai, Hsieh-Chih Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei 106 Taiwan Advanced Membrane Materials Center National Taiwan University of Science and Technology Taipei 106 Taiwan R&D Center for Membrane Technology Chung Yuan Christian University Taoyuan 320 Chungli Taiwan Department of Material Science and Engineering National Taiwan University of Science and Technology Taipei 106 Taiwan

Because of sulfite's potential toxicity, there is a growing concern about detecting and controlling its concentration in foods, alcoholic beverages, pharmaceuticals, and environmental samples to ensure public health. A branched polyethyleneimine-coated silver nano-star (AgNS@PEI) surface-enhanced raman scattering (SErS) substrate was synthesized in this study for use as a sensitive, simple, rapid, stable, and reproducible non-destructible sulfite detection analytical technique. The seed morphology of the nano-star was created by using hydroxylamine (NH2OH) solution as a primary reducing agent, followed by a slow secondary reduction by trisodium citrate dihydrate (HOC(COONa)(CH2COONa)2 2H2O), resulting in the complete growth of the silver nano-star. For extra stability and selective absorption of sulfur dioxide from the headspace extraction of SO2 from sulfites, the nano-stars were thin coated with branched polyethyleneimine (b-PEI). The results showed that the thin-coated plasmonic substrates selectively absorb sulfur dioxide molecules, allowing sulfites in beer samples to be detected with a detection limit of 0.48 mg/L. Furthermore, the PEI-coated silver nano-star demonstrated increased stability and reproducibility, allowing for longer use of the substrate. recovery experiments with recovery rates ranging from 95 to 112% and relative standard deviations ranging from 1.55 to 8.1% demonstrated that headspace extraction, selective SO2 absorption by the synthesized substrate, and subsequent SErS detections were reliable and valid for practical applications. Finally, this study developed an SO2-sensitive, selective, and robust Si@AgNS@PEI substrate for effective SErS detection and monitoring of sulfite levels in real-world environmental samples. © 2023

关键词： Surface scattering

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A Way of Making Smart Health Through Collaborating Machine Learning with the Bibliometrics 4

A Way of Making Smart Health Through Collaborating Machine L...

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4th IEEE International Conference on Advance Computing and Innovative Technologies in Engineering, ICACITE 2024

作者： Vignesh, T. Sruthi, P.S. Mohanraj, T. Kumar, Gaurav Varkale, Akshay Sheela, M.Sahaya Prince Shri Venkateshwara Padmavathy Engineering College Department of Computer Science and Engineering TN India Nehru Institute of Technology Department of Computer Science and Business System Tamil Nadu T.M. Palayam India Karpagam Academy of Higher Education Department of Computer Science Engineering India Chitkara University Chitkara Centre for Research and Development Himachal Pradesh India M.P Bhopal India Vel Tech Rangarajan Dr. Sagunthala R&d Institute of Science and Technology Department of Electronics and Communication Engineering Tamil Nadu Chennai India

ISBN: (纸本)9798350360165

It datasets are widely utilized, shared, and repurposed without providing enough context for understanding the decision-making processes that led to their creation. It is necessary to modify system creation and use procedures to handle the concrete effects of how knowledge for model building is envisioned and used in real-world applications as AI systems assume more and more important roles. documents are created at every phase of the data generation lifecycle to improve communication, aid in decision-making, and highlight the need of careful data work. By putting out this paradigm, we want to shed light on the choices and duties that are often disregarded while creating datasets, which is a crucial first step in bridging the duty of care gap in AI. This framework provides an essential and important resource for guaranteeing ethical AI activities, and it is in line with current developments in auditing procedures. © 2024 IEEE.

关键词： Adversarial machine learning

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Enhanced Energy Storage of Bi2s3 Supercapacitor by Two Step Hydrothermal Electrode Fabrication Process

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SSrN 2022年

作者： Sinha, Lichchhavi Kumar, Sarvesh Srivastava, Alok Kumar Jha, Shikhar Krishn Department of Material Science and Engineering Indian Institute of Technology Kanpur Uttar Pradesh Kanpur208016 India Defense Materials & Stores R&D Establishment DRDO Kanpur India

A facile binder-free electrode has been architectured by hydrothermal deposition of Bi2S3 over the Nickel (Ni) foam resulting in better adhesion and electrochemical functioning. The process-controlled morphologies led to an enhanced electrochemical activity obtained due to enhanced surface area (149.698 m2/g) and high binding of Bi2S3 and Ni foam. The electrochemical supercapacitor studies revealed its battery-type characteristics which show a semi-infinite diffusion-controlled faradaic process that occurs in the bulk of the nanomaterial. The material exhibits an enhanced capacity of 1906 A h g-1 at a constant high-discharging current density of 5 Ag-1. Furthermore, it provides a very high capacitive retention up to 97.22% till 2000 cycles owing to its unique structural and morphological stability. The novel method of electrode design and its morphological changes have enabled to surpass the electrochemical performance of many other previously reported Bi2S3-related materials. © 2022, The Authors. All rights reserved.

关键词： Supercapacitor

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Micro-Nano Polymer Microspheres as a Plugging Agent in Oil-Based drilling Fluid

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SSrN 2023年

作者： Zhao, Zhen Sun, Jinsheng Liu, Fan Cheng, rongchao Bai, Yingrui Wang, ren Wang, Jintang Geng, Yuan Jin, Yeliang Ma, Zhihu CNPC Engineering Technology R&D Company Limited Beijing102206 China Research Institute of Petroleum Exploration &Development Beijing100083 China China Department of Petroleum Engineering China University of Petroleum Beijing China

The wellbore instability of shale formations with micro fractures was mainly ascribed to drilling fluid invasion and pressure transmission during drilling using oil-based drilling fluids (OBdF). Nano-plugging agents or micro-plugging agents at present only match a narrow size range of nanopores or microcracks. Plugging agents with good suitability to multidimensional fractures used in OBdF are lacking. This paper synthesized micro-nano polymer microsphere dispersion (PMd) with a solid content of 30% through inverse emulsion polymerization. PMs had good wettability for water in the oil environment. The filtration of the emulsion with 4% PMd dropped the filtration through 0.1~3 μm filters to within 14 mL while the emulsion with 1% CaCO3 only plugged the filter with a pore size of 3 μm. Hydrophilic PMs with a wide size distribution have excellent suitability with multi-scale pores or cracks. PMs could reduce the filtration of OBdF after aging at 120 and 150℃ without significantly influencing their rheology and electrical stability. Based on darcy’s law, the HTHP mud cake permeability calculated decreased by half with the addition of PMd at 120 and 150℃. Moreover, the addition of PMd could decline the disc HTHP filtration by 100~50% when the disc diameter was 5~120 μm respectively. Compared with CaCO3, the PMd showed superior plugging performance and self-suitability when plugging 5~120 μm discs. Micro-nano PMs could interact with organic clays through hydrogen bonds to form thinner and denser mud cakes. They could also form hydrogen bonds with the formation surface. PMs could enter, aggregate and arrange tightly at multi-scale pores or cracks owing to their wide size distribution. In addition, they formed a dense plugging layer and prevent the filtration from invading the formation. The PMd with good compatibility, suitability and plugging performance has a promising application prospect in shale oil and gas exploration. © 2023, The Authors. All rights reserved.

关键词： Emulsification

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research on Off-design Performance Prediction Method of diagonal Compressor With Adjustable Guide Vane

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Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 2025年第3期46卷 777-789页

作者： Zhang, Yuxin Zuo, Zhitao Guo, Wenbin Li, Jingxin Chen, Haisheng Qin, Wei Institute of Engineering Thermophysics Chinese Academy of Science Beijing100190 China University of Chinese Academy of Science Beijing100049 China National Energy Large-scale Physical Energy Storage Technology R&D Center of Bijie High-Tech Industrial Development Zone Bijie551712 China Nanjing Institute of Future Energy System Institute of Engineering Thermophysics Chinese Academy of Science Nanjing211135 China

The diagonal compressor is one of the important types of combined compressors for large-scale compressed air energy storage system (CAES). The off-design performance prediction is crucial in the research and development of the diagonal compressor. It can not only quickly evaluate the initial design parameters, but also select the overall optimal parameters according to the characteristics of the off-design operation of the compressor in CAES. The accuracy of the performance prediction model is essential. In this paper, a one dimensional performance prediction program for the diagonal compressor of the developing large-scale CAES is established by programming, and the optimal selection result of the loss model combination of the program is given through the design point parameters. Then, the off-design loss model is modified by using the flow coefficient, and the results are verified by CFd. The results show that this method can effectively predict the off-design performance of the diagonal compressor under different guide vane openings. © 2025 Science Press. All rights reserved.

关键词： Compressed air energy storage

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Intelligent distribution Grid reliability Simplification Algorithm and Online Computing Implementation

Intelligent Distribution Grid Reliability Simplification Alg...

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New Energy and Power Engineering (ICNEPE), International Conference on

作者： Hongjun Wen Bowei Chen Zuxin Li Jiqiao Chen Zhi Nie Qian Wu Power Grid Development Department State Grid Zhejiang Electric Power Co. Ltd. Lishui Company Lishui China R&D Center T&D Power Research (Beijing) Technology Co. Ltd Beijing China

At present, reliability calculation is mostly focused on the calculation of current years, and the calculation of planned years is often carried out using fuzzy estimation. The calculation methods are complex and diverse, which is not conducive to the modular implementation of software. This article deeply analyzes the essence of reliability calculation based on the topology simplification model of power flow, and summarizes the parts related to the grid structure in its classic calculation formula as the grid coefficient. The parts related to the equipment are collected as the equipment coefficient, and the calculation is simplified based on practical applications. Then, based on the power grid resource business center and data center, a centralized (microservices/micro applications) + collaborative computing framework construction model is adopted, integrating basic data such as reliability facility ledger, topology, and graph model, and obtaining important parameters such as fault rate and average recovery time of distribution grid equipment components. Based on simplified calculation formulas, a power supply reliability online calculation micro application module is developed, The calculation results can provide convenient data support for reliability management and decision-making of distribution grids. This article also provides the specific implementation of software architecture design and interface display effects.

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Estimating Ground Conditions for Efficient Operation of robotic Lawn Mowers

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Journal of Japan Institute of Electronics Packaging 2022年第3期25卷 240-249页

作者： Zushida, Kazuki Zhang, Haohao Kojima, Masaki Motegi, Kazuhiro Shiraishi, Yoichi Shimamura, Hideaki Yamada, So Department of Mechanical Science and Technology Graduate School of Science and Technology Gunma University 29-1 Honcho Gunma Ota-shi373-0057 Japan Research and Development Division Nippon Mobility Inc. Maebashi Center Building15th floor C 2-13-11 Honcho Maebashi-shi Gunma371-0023 Japan Life Creation Center Honda R&D Co. Ltd. 3-15-1 Senzui Asaka-shi Saitama351-0024 Japan

The objective of this research is to estimate the length of the grass and the condition of the ground when a robotic lawn mower runs using the random Forest and Neural Network, and to change the running control according to the ground conditions for efficient lawn mowing. The main robotic lawn mowers currently on the market cannot recognize the length of the grass or the condition of the ground other than the lawn, such as bare soil. Therefore, the robotic lawn mower always rotates its blade at the maximum speed while running randomly over the specified area. In order to mow the lawn efficiently, we propose to estimate the length of the grass and the ground condition using sensors and machine learning, and to control the mower appropriately. In this study, we experimentally show that the system achieves a correct answer rate of more than 90% in estimating the ground conditions. Copyright© The Japan Institute of Electronics Packaging.

关键词： Lawn mowers

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Fluorine-Free Paraffin Binder-Based dry Thick Electrodes Toward Sustainable and Efficient Battery Manufacturing

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SSrN 2024年

作者： Kim, Min Kyung Yu, Taegyun Jang, Sungbin Lee, Juho Jang, Min Oh, Hyeseong Cha, Hyungyeon Lee, Huiyeol Kang, Joonhee Lee, Seung Min Shim, Hyeongseok Lee, Kwon-Hyung Song, Gyujin Jin, Wooyoung Kim, Tae-Hee Jeong, Kyeong-Min Han, Joong Tark Yoo, Jung-Keun Song, Sanghyun Park, Myoungkeon Seong, Jinwoo Kim, dongoh Choi, Hyunwoo Seong, Minjong Lim, Min Jin Hwang, Wook ryol Nam, Jieun Jo, Sanghoon Kim, Jinsoo Ulsan Advanced Energy Technology R&D Center Korea Institute of Energy Research Ulsan Korea Republic of Department of Nano Fusion Technology Pusan National University Busan Korea Republic of Department of Organic Material Science and Engineering Pusan National University Busan Korea Republic of Ulsan Korea Republic of Changwon Korea Republic of Changwon Korea Republic of Seoul Korea Republic of R&D Center Rechargeable Battery Division Hanwha Momentum Seongnam Korea Republic of School of Mechanical Engineering Gyeongsang National University Jinju Korea Republic of R&D Center Yunsung F&C Co. Ltd. Anseong Korea Republic of Multiphysics Digital Twin Lab Trinity Engineering Seoul Korea Republic of

dry electrodes are being actively developed for sustainable and efficient battery manufacturing. Currently, polytetrafluoroethylene (PTFE) binders dominate dry processes, yet their production contributes to significant CO2 emissions, and concerns persist regarding their high fluorine content, especially considering evolving per- and polyfluorinated substances (PFAS) restrictions. Moreover, the poor adhesion of bare current collectors necessitates a wet coating-based primer layer with this binder. In this study, we introduce an alternative dry processing concept based on a thermoplastic fluorine-free binder with low environmental impact and high productivity. Paraffin, a short-chain family of saturated hydrocarbons known as an n-alkane, is the most stable chemical species owing to its C-H covalent bonds and the wide gap between highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies. It also has a low melting temperature, allowing facile cohesion of the active materials to be interconnected by mild pressing activation. This novel dry electrode binder provides substantial electrochemical properties based on both NCM811 cathodes over 5 mAh cm−2 for 500 cycles. Furthermore, it implements true solvent-free adhesion without the wet-coating of primers on the current collector. This unique characteristic of paraffin can enable a powder-to-electrode manufacturing strategy with pattern coating, which alters the well-known PTFE-based freestanding electrode concept. This integrated approach bridges the gap between materials and processes, paving the way for sustainable advancements in battery electrode technology. © 2024, The Authors. All rights reserved.

关键词： Binders

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