检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Wang, Renda Daghbouj, Nabil Yu, Ping Li, Peng Meng, Fanping Cammarata, Antonio Li, Bingsheng Polcar, Tomas Zhang, Xinghang Huang, Qing Ge, Fangfang Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Technická 2 Prague 6160 00 Czech Republic School of Electronics and Information Engineering Ningbo University of Technology Ningbo315211 China University of Chinese Academy of Sciences Beijing100049 China Advanced Energy Science and Technology Guangdong Laboratory Huizhou516000 China State Key Laboratory for Environment-friendly Energy Materials Southwest University of Science and Technology Mianyang621010 China School of Materials Engineering Purdue University West LafayetteIN47907 United States

advanced materials capable of withstanding high radiation levels at elevated temperatures are essential for the development of next-generation fission and future fusion energy technologies. However, current structural materials, despite their potential, deteriorate under the harsh radiation environment, leading to irreversible microstructure degradation. In this context, we have designed CrAlSiN, which features a vein-like nanochannel structure embedded within amorphous layers. We subjected this material to helium (He) irradiation, followed by annealing and oxidation processes. Under extreme conditions, this composition demonstrates the absence of bubble formation, negligible hardening, exceptional thermal stability, and oxidation resistance. Through density functional theory (DFT) simulations, we have clarified that the improved radiation tolerance is primarily attributed to the presence of nitrogen (N) atoms. These N atoms facilitate a significant rearrangement of ions surrounding vacancies, leading to the formation of new bonds with N atoms. This phenomenon preserves the vein-like structure and results in the elimination of vacancies. Consequently, this mechanism prevents the formation of sites that could trap He atoms. These findings provide the groundwork for a conceptual framework that paves the way for designing the next generation of structural alloys engineered to exhibit enhanced radiation tolerance. © 2023, The Authors. All rights reserved.

关键词： Oxidation resistance

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Decentralized temperature and storage volume control in multi-producer district heating

arXiv

引用

arXiv 2022年

作者： Martinez, Juan Eduardo Machado Ferguson, Joel Cucuzzella, Michele Scherpen, Jacquelien M.A. The Jan C. Willems Center for Systems and Control ENTEG Faculty of Science and Engineering University of Groningen Nijenborgh 4 Groningen9747 AG Netherlands The School of Engineering The University of Newcastle Australia The Department of Electrical Computer and Biomedical Engineering University of Pavia via Ferrata 5 Pavia27100 Italy

Modern district heating technologies have a great potential to make the energy sector more flexible and sustainable due to their capabilities to use energy sources of varied nature and to efficiently store energy for subsequent use. Central control tasks within these systems for the efficient and safe distribution of heat refer to the stabilization of overall system temperatures and the regulation of storage units state of charge. These are challenging goals when the networked and nonlinear nature of district heating system models is taken into consideration. In this letter, for district heating systems with multiple, distributed heat producers, we propose a decentralized control scheme to provably meet said tasks stably. Copyright © 2022, The Authors. All rights reserved.

关键词： District heating

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Updates of the surface detector array of the TAx4 experiment 38

Updates of the surface detector array of the TAx4 experiment

引用

38th International Cosmic Ray Conference, ICRC 2023

作者： Kido, Eiji Abbasi, R.U. Abe, Y. Abu-Zayyad, T. Allen, M. Arai, Y. Arimura, R. Barcikowski, E. Belz, J.W. Bergman, D.R. Blake, S.A. Buckland, I. Cheon, B.G. Chikawa, M. Fedynitch, A. Fujii, T. Fujisue, K. Fujita, K. Fujiwara, R. Fukushima, M. Furlich, G. Gerber, Z. Globus, N. Hanlon, W. Hayashida, N. He, H. Hibi, R. Hibino, K. Higuchi, R. Honda, K. Ikeda, D. Inoue, N. Ishii, T. Ito, H. Ivanov, D. Iwasaki, A. Jeong, H.M. Jeong, S. Jui, C.C.H. Kadota, K. Kakimoto, F. Kalashev, O. Kasahara, K. Kasami, S. Kawakami, S. Kawata, K. Kharuk, I. Kido, E. Kim, H.B. Kim, J.H. Kim, J.H. Kim, S.W. Kimura, Y. Komae, I. Komori, K. Kusumori, Y. Kuznetsov, M. Kwon, Y.J. Lee, K.H. Lee, M.J. Lubsandorzhiev, B. Lundquist, J.P. Matsuyama, T. Matthews, J.A. Matthews, J.N. Mayta, R. Miyashita, K. Mizuno, K. Mori, M. Murakami, M. Myers, I. Nagataki, S. Nakai, K. Nakamura, T. Nishio, E. Nonaka, T. Ogio, S. Ohoka, H. Okazaki, N. Oku, Y. Okuda, T. Omura, Y. Onishi, M. Ono, M. Oshima, A. Oshima, H. Ozawa, S. Park, I.H. Park, K.Y. Potts, M. Pshirkov, M.S. Remington, J. Rodriguez, D.C. Rott, C. Rubtsov, G.I. Ryu, D. Sagawa, H. Saito, R. Sakaki, N. Sako, T. Sakurai, N. Sato, D. Sato, K. Sato, S. Sekino, K. Shah, P.D. Shibata, N. Shibata, T. Shikita, J. Shimodaira, H. Shin, B.K. Shin, H.S. Shinto, D. Smith, J.D. Sokolsky, P. Stokes, B.T. Stroman, T.A. Takagi, Y. Takahashi, K. Takamura, M. Takeda, M. Takeishi, R. Taketa, A. Takita, M. Tameda, Y. Tanaka, K. Tanaka, M. Thomas, S.B. Thomson, G.B. Tinyakov, P. Tkachev, I. Tokuno, H. Tomida, T. Troitsky, S. Tsuda, R. Tsunesada, Y. Udo, S. Urban, F. Vaiman, I.A. Warren, D. Wong, T. Yamazaki, K. Yashiro, K. Yoshida, F. Zhezher, Y. Zundel, Z. Department of Physics Loyola University Chicago ChicagoIL60660 United States Academic Assembly School of Science and Technology Institute of Engineering Shinshu University Nagano Nagano380-8554 Japan High Energy Astrophysics Institute Department of Physics and Astronomy University of Utah Salt Lake CityUT84112-0830 United States Graduate School of Science Osaka Metropolitan University Sugimoto Sumiyoshi Osaka558-8585 Japan Department of Physics The Research Institute of Natural Science Hanyang University Seongdong-gu Seoul426-791 Korea Republic of Institute for Cosmic Ray Research University of Tokyo Kashiwa Chiba277-8582 Japan Institute of Physics Academia Sinica Taipei City115201 Taiwan Nambu Yoichiro Institute of Theoretical and Experimental Physics Osaka Metropolitan University Sugimoto Sumiyoshi Osaka558-8585 Japan Astrophysical Big Bang Laboratory RIKEN Wako Saitama351-0198 Japan Faculty of Engineering Kanagawa University Yokohama Kanagawa221-8686 Japan Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi Yamanashi Kofu400-8511 Japan The Graduate School of Science and Engineering Saitama University Saitama Saitama338-8570 Japan Department of Physics SungKyunKwan University Jang-an-gu Suwon16419 Korea Republic of Department of Physics Tokyo City University Setagaya-ku Tokyo158-8557 Japan Institute for Nuclear Research The Russian Academy of Sciences Moscow117312 Russia Faculty of Systems Engineering and Science Shibaura Institute of Technology Minato-ku Tokyo337-8570 Japan Graduate School of Engineering Osaka Electro-Communication University Neyagawa-shi Osaka572-8530 Japan Service de Physique Théorique Université Libre de Bruxelles Brussels1050 Belgium Department of Physics Yonsei University Seodaemun-gu Seoul120-749 Korea Republic of Center for Astrophysics and Cosmology University of Nova Gorica Nova Gorica5297 Slovenia Faculty of Science Kochi University Kochi Kochi7

The TAx4 experiment plans to realize an Ultra High Energy Cosmic Rays (UHECR) detection area four times larger than that of the TA experiment. TAx4 will include five hundreds new surface detectors (SD) spaced at 2.08 km and two new fluorescence detectors (FD), which provides hybrid observation of UHECRs. We deployed 257 SDs in 2019 and completed building 2 FD stations in 2020, all operating stably. The data acquisition of the SDs is made via six communication towers, and inter-tower triggers have been recently implemented. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmology

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Oxalamide-Functionalized Metal Organic Frameworks for CO₂Adsorption

引用

ACS Applied Materials and Interfaces 2021年第28期13卷 33188-33198页

作者： Güçlü, Yunus Erer, Hakan Demiral, Hakan Altintas, Cigdem Keskin, Seda Tumanov, Nikolay Su, Bao-Lian Semerci, Fatih Department of Energy Systems Engineering Faculty of Technology Klrklareli University Klrklareli 39000 Turkey Department of Chemistry Faculty of Science and Letters Eskişehir Osmangazi University Eskişehir 26040 Turkey Department of Chemical Engineering Faculty of Engineering and Architecture Eskişehir Osmangazi University Eskişehir 26040 Turkey Department of Chemical and Biological Engineering Koç University Rumelifeneri Yolu Istanbul Sarlyer 34450 Turkey Chemistry Department University of Namur Rue de Bruxelles 61 Namur 5000 Belgium Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 Rue de Bruxelles Namur 5000 Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Hubei Wuhan 430070 China

Metal-organic frameworks (MOFs) have received great attention in recent years as potential adsorbents for CO2 capture due to their unique properties. However, the high cost and their tedious synthesis procedures impede their industrial application. A series of new CO2-philic oxalamide-functionalized MOFs have been solvothermally synthesized: {[Zn3(μ8-OATA)1.5(H2O)2(DMF)]·5/2H2O·5DMF}n (Zn-OATA), {[NH2(CH3)2][Cd(μ4-HOATA)]·H2O·DMF}n (Cd-OATA), and {[Co2(μ7-OATA)(H2O)(DMF)2]·2H2O·3DMF}n (Co-OATA) (H4OATA = N,N′-bis(3,5-dicarboxyphenyl)oxalamide). In Zn-OATA, the [Zn2(CO2)4] SBUs are connected by OATA4- ligands into a 3D framework with 4-connected NbO topology. In Cd-OATA, two anionic frameworks with a dia topology interpenetrated each other to form a porous structure. In Co-OATA, [Co2(CO2)4] units are linked by four OATA4- to form a 3D framework with binodal 4,4-connected 42·84 PtS-type topology. Very interestingly, Cu-OATA can be prepared from Zn-OATA by a facile metal ions exchange procedure without damaging the structure while the CO2 adsorption ability can be largely enhanced when Zn(II) metal ions are exchanged to Cu(II). These new MOFs possess channels decorated by the CO2-philic oxalamide groups and accessible open metal sites, suitable for highly selective CO2 adsorption. Cu-OATA exhibits a significant CO2 adsorption capacity of 25.35 wt % (138.85 cm3/g) at 273 K and 9.84 wt % (50.08 cm3/g) at 298 K under 1 bar with isosteric heat of adsorption (Qst) of about 25 kJ/mol. Cu-OATA presents a very high selectivity of 5.5 for CO2/CH4 and 43.8 for CO2/N2 separation at 0.1 bar, 298 K. Cd-OATA exhibits a CO2 sorption isotherm with hysteresis that can be originated from structural rearrangements. Cd-OATA adsorbs CO2 up to 11.90 wt % (60.58 cm3/g) at 273 K and 2.26 wt % (11.40 cm3/g) at 298 K under 1 bar. Moreover, these new MOFs exhibit high stability in various organic solvents, water, and acidic or basic media. The present work opens a new opportunity in the developm

关键词： CO2adsorption gas separation metal organic frameworks oxalamide-functionalization water stability

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Fault Analysis of Microgrids with Inverter Interfaced Resources in Grid-Connected and Islanded Modes

Fault Analysis of Microgrids with Inverter Interfaced Resour...

引用

On-Line Conference (ONCON), Industrial Electronics Society Annual

作者： Jigyesh Sharma Kushan Tharuka Lulbadda Anindita Golder Tarlochan Sidhu Sheldon S. Williamson Department of Electrical and Computer Engineering Advanced Storage Systems and Electric Transportation (ASSET) Laboratory Ontario Tech-Automotive Center of Excellence (ACE) Faculty of Engineering and Applied Science Smart Transportation Electrification and Energy Research (STEER) Group Ontario Tech University Oshawa ON Canada

The increasing penetration of inverter-based generation such as solar, wind and battery energy storage systems (BESS) has an impact on the fault currents in a microgrid. Also, if the microgrid is grid-connected or islanded affects the fault current. As such, it is important to conduct fault analysis of microgrids in grid-connected and islanded modes with different penetration levels of inverter-based generation sources to understand the impact of increasing levels of renewable energy on the fault currents. Different types of faults in a microgrid with inverter-based resources are simulated and the results are discussed and analyzed in this paper.

关键词： Wind energy generation Industrial electronics Renewable energy sources Wind energy Microgrids Inverters Batteries

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Roles of superabsorbent polymers (SAPs) and palm oil fuel ash (POFA) on the strength, cost analysis and CO₂ emission of lightweight concrete: Comparison with aluminum-based aerated concrete

引用

Heliyon 2024年第23期10卷 e40305页

作者： Kunchariyakun, Kittipong Sinyoung, Suthatip MacKenzie, Kenneth J.D. Chaiprapat, Sumate School of Engineering and Technology Walailak University Nakhonsithammarat Thailand Center of Excellence in Sustainable Disaster Management Walailak University Nakhonsithammarat Thailand Department of Civil and Environmental Engineering Faculty of Engineering Prince of Songkla University Songkhla Thailand MacDiarmid Institute for Advanced Materials and Nanotechnology School of Chemical and Physical Science Victoria University of Wellington Wellington New Zealand PSU Energy Systems Research Institute Prince of Songkla University Songkhla Thailand

This work investigated the effects of superabsorbent polymers (SAPs) as pore-forming agent and palm oil fuel ash (POFA) as sand replacement (0–100 % by weight) on the strength, economic feasibility, and CO₂ emissions for lightweight concrete production. The product properties were compared with the traditional aerated concrete (with aluminum powder), which aimed to shed light on the use of SAPs and POFA for manufacturing a more sustainable lightweight concrete. The use of POFA to replace sand increased the cost of production by approximately 1–7% and CO₂ emissions by approximately 3–12 % due primarily to the transportation of the POFA from the oil palm fuel power plant, which could be avoided if produced on site of or near the power plant. The use of SAPs in the preparation of the lightweight concrete led to a reduced compressive strength compared to the aerated concrete, especially in the autoclaved samples, calculated as 15–33 % for 28 days and 44–56 % for autoclaved curing, possibly due to a collapse of the porous structure under high temperature and pressure. These drawbacks could be eliminated if the natural SAPs in the form of fine particle size were treated with Ca²⁺ in agro-waste ash so as to facilitate and enhance the pozzolanic reaction during the curing phase. The fossil-based SAPs could then be replaced with the organic-based ones, which would be a more sustainable construction material for a lower-carbon society. However, further investigations into other aspects of these materials should be conducted. © 2024 The Authors

关键词： Lightweight concrete Palm oil fuel ash Superabsorbent polymers

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Highlights from the Telescope Array Experiment 38

Highlights from the Telescope Array Experiment

引用

38th International Cosmic Ray Conference, ICRC 2023

作者： Kim, Jihyun Abbasi, R.U. Abe, Y. Abu-Zayyad, T. Allen, M. Arai, Y. Arimura, R. Barcikowski, E. Belz, J.W. Bergman, D.R. Blake, S.A. Buckland, I. Cheon, B.G. Chikawa, M. Fedynitch, A. Fujii, T. Fujisue, K. Fujita, K. Fujiwara, R. Fukushima, M. Furlich, G. Gerber, Z. Globus, N. Hanlon, W. Hayashida, N. He, H. Hibi, R. Hibino, K. Higuchi, R. Honda, K. Ikeda, D. Inoue, N. Ishii, T. Ito, H. Ivanov, D. Iwasaki, A. Jeong, H.M. Jeong, S. Jui, C.C.H. Kadota, K. Kakimoto, F. Kalashev, O. Kasahara, K. Kasami, S. Kawakami, S. Kawata, K. Kharuk, I. Kido, E. Kim, H.B. Kim, J.H. Kim, J.H. Kim, S.W. Kimura, Y. Komae, I. Komori, K. Kusumori, Y. Kuznetsov, M. Kwon, Y.J. Lee, K.H. Lee, M.J. Lubsandorzhiev, B. Lundquist, J.P. Matsuyama, T. Matthews, J.A. Matthews, J.N. Mayta, R. Miyashita, K. Mizuno, K. Mori, M. Murakami, M. Myers, I. Nagataki, S. Nakai, K. Nakamura, T. Nishio, E. Nonaka, T. Ogio, S. Ohoka, H. Okazaki, N. Oku, Y. Okuda, T. Omura, Y. Onishi, M. Ono, M. Oshima, A. Oshima, H. Ozawa, S. Park, I.H. Park, K.Y. Potts, M. Pshirkov, M.S. Remington, J. Rodriguez, D.C. Rott, C. Rubtsov, G.I. Ryu, D. Sagawa, H. Saito, R. Sakaki, N. Sako, T. Sakurai, N. Sato, D. Sato, K. Sato, S. Sekino, K. Shah, P.D. Shibata, N. Shibata, T. Shikita, J. Shimodaira, H. Shin, B.K. Shin, H.S. Shinto, D. Smith, J.D. Sokolsky, P. Stokes, B.T. Stroman, T.A. Takagi, Y. Takahashi, K. Takamura, M. Takeda, M. Takeishi, R. Taketa, A. Takita, M. Tameda, Y. Tanaka, K. Tanaka, M. Thomas, S.B. Thomson, G.B. Tinyakov, P. Tkachev, I. Tokuno, H. Tomida, T. Troitsky, S. Tsuda, R. Tsunesada, Y. Udo, S. Urban, F. Vaiman, I.A. Warren, D. Wong, T. Yamazaki, K. Yashiro, K. Yoshida, F. Zhezher, Y. Zundel, Z. High Energy Astrophysics Institute Department of Physics and Astronomy University of Utah Salt Lake CityUT84112-0830 United States Department of Physics Loyola University Chicago ChicagoIL60660 United States Academic Assembly School of Science and Technology Institute of Engineering Shinshu University Nagano Nagano380-8554 Japan Graduate School of Science Osaka Metropolitan University Sugimoto Sumiyoshi Osaka 558-8585 Japan Department of Physics The Research Institute of Natural Science Hanyang University Seongdong-gu Seoul426-791 Korea Republic of Institute for Cosmic Ray Research University of Tokyo Chiba Kashiwa277-8582 Japan Institute of Physics Academia Sinica Taipei City115201 Taiwan Nambu Yoichiro Institute of Theoretical and Experimental Physics Osaka Metropolitan University Sugimoto Sumiyoshi Osaka558-8585 Japan Astrophysical Big Bang Laboratory RIKEN Saitama Wako351-0198 Japan Faculty of Engineering Kanagawa University Kanagawa Yokohama221-8686 Japan Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi Yamanashi Kofu400-8511 Japan The Graduate School of Science and Engineering Saitama University Saitama Saitama338-8570 Japan Department of Physics SungKyunKwan University Jang-an-gu Suwon16419 Korea Republic of Department of Physics Tokyo City University Setagaya-ku Tokyo158-8557 Japan Institute for Nuclear Research The Russian Academy of Sciences Moscow117312 Russia Faculty of Systems Engineering and Science Shibaura Institute of Technology Minato-ku Tokyo337-8570 Japan Graduate School of Engineering Osaka Electro-Communication University Neyagawa-shi Osaka572-8530 Japan Service de Physique Théorique Université Libre de Bruxelles Brussels1050 Belgium Department of Physics Yonsei University Seodaemun-gu Seoul120-749 Korea Republic of Center for Astrophysics and Cosmology University of Nova Gorica Nova Gorica5297 Slovenia Faculty of Science Kochi University Kochi Kochi

The Telescope Array (TA) is the largest ultra-high energy cosmic ray (UHECR) observatory in the Northern Hemisphere. Together with the TA Low Energy Extension (TALE), TA×4, and TALE infill detector, the TA measures the properties of UHECR-induced extensive air showers (EAS) in the energy region from 1015 eV to over 1020 eV. Each of these uses a hybrid system with an array of scintillators to sample the footprint of the EAS at the Earth’s surface along with telescopes that measure the fluorescence and Cherenkov light from the EAS. The statistics at the highest energies are being enhanced with the TA×4 detector, half completed but still under construction, which will quadruple the surface detector area with telescopes. The TALE infill surface detectors were recently deployed to further lower the hybrid energy threshold of TALE. We present the status of the experiment and recent results on the energy spectrum, mass composition, and anisotropy, including new features in the energy spectrum at about 1019.2 eV and in the UHECR arrival direction anisotropy. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmic rays

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ARE BIOPOLYMERS THE WEAPON AGAINST POLLUTION DUE TO DISPOSABLE PACKAGING? NEW BIOBASED EDIBLE MATERIALS FOR PACKAGING FOOD SUPPLEMENTS 21

ARE BIOPOLYMERS THE WEAPON AGAINST POLLUTION DUE TO DISPOSAB...

引用

21st International Multidisciplinary Scientific Geoconference: Ecology, Economics, Education and Legislation, SGEM 2021

作者： Gheorghita, Roxana Gutt, Gheorghe Department of Human and Health Development Stefan cel Mare University of Suceava Romania Integrated Center for Research Development and Innovation in Advanced Materials Nanotechnologies and Distributed Systems for Fabrication and Control Stefan cel Mare University of Suceava Romania Faculty of Food Engineering Stefan cel Mare University of Suceava Romania

ISBN: (纸本)9786197603361

Nowadays, the food supplement industry has grown considerably, mainly due to the orientation of consumers towards more natural products. In Romania, the Institute of Food Bioresources notified over 900 food supplements in 2020 and over 1500 in 2019. Unfortunately, the use of these supplements, although healthy, is problematic due to environmental pollution. The packaging used, often disposable, is highly polluting, multilayer, difficult to sort and impossible to recycle. This paper presents a viable option for packaging food supplements: completely edible materials, obtained from biopolymers, with rosemary, thyme and oregano essential oils addition. Agar, sodium alginate, and glycerol were used to obtain the films. The essential oils were added in different volumes. The samples were tested in order to evaluate the physical and optical characteristics and to determine solubility. The solubility characteristics are important in this sense as these films are recommended as packaging for food supplements and can be consumed with them, by dissolving in liquids with a temperature of about 30 degrees. The addition of essential oil has improved the physical characteristics of the films. Thus, they presented a more pleasant smell, taste and color, improved transmittance, and reduced roughness. The films were also tested microbiologically, and no microorganisms such as bacteria, yeasts and molds developed on the samples. The addition of essential oil increased the values of the film transmittance (from 4.22% in the case of the control sample, to 15.98% in the case of the sample with 25 microliters of oregano essential oil). Similarly, the opacity values decreased with the addition of essential oils (from 28.254 to 17.24 for the sample with a lower volume of oregano essential oil in the composition). According to microstructure images and micro topographies, films with the addition of oregano essential oil are more homogeneous, more uniform and with lower roughness values. The

关键词： Packaging

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THE IMPORTANCE OF STARCH SOURCE IN THE DEVELOPMENT OF EDIBLE MATERIALS FOR FOOD PACKAGING 21

THE IMPORTANCE OF STARCH SOURCE IN THE DEVELOPMENT OF EDIBLE...

引用

21st International Multidisciplinary Scientific Geoconference: Nano, Bio and Green - Technologies for a Sustainable Future, SGEM 2021

ISBN: (纸本)9786197603361

The packaging of a food product is an extremely important step in its path from development to the final consumer. The packaging has important functions: preservation and protection of packaged products, handling, storage and transport, as well as promotion. Most consumers choose a product based on its packaging, so we can say that it is the business card of a product. But because the consumer has refined his preferences and become more and more attentive to what he buys, the industry is looking for solutions to create new, biodegradable or compostable materials, that can bring benefits for the producer, trader and, especially, the consumer. The present study focused at developing new materials that can be used for packaging products and food supplements, being obtained entirely from starch from various sources, and plasticizer. In this sense, three types of starch were used;derived from corn, wheat and potatoes, 12 films with different concentrations of starch (50-100%) and glycerol (0-50%) were obtained. After development, the films were tested in order to establish some characteristics such as: microstructure, thickness, retraction ratio, color, transmittance, opacity, water activity index, moisture and water solubility. The results indicate that the final properties of the materials are influenced by the type of starch used. Thus, the films obtained from wheat starch and potatoes, plasticized with 50% glycerol are self-adhesive, with high solubility, and can be used for packaging products with low moisture content, and which are completely solubilized when consumed (food supplements, candies, raw sausages dried sliced etc.). The films obtained from potato starch with the addition of 10, respectively 25% plasticizer, are finer, with higher transmittance, but insoluble, which do not allow multiple bending, and with high fracturability, unlike films obtained from wheat starch, that were softer, finer, flexible and with higher solubility. The films obtained with cor

关键词： Starch

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Decentralized Nonconvex Robust Optimization over Unsafe Multiagent systems: System Modeling, Utility, Resilience, and Privacy Analysis

arXiv

引用

arXiv 2024年

作者： Hu, Jinhui Chen, Guo Li, Huaqing Cheng, Huqiang Guo, Xiaoyu Huang, Tingwen School of Automation Central South University Changsha410083 China Department of Biomedical Engineering City University of Hong Kong Kowloon Hong Kong School of Electrical Engineering and Telecommunications University of New South Wales SydneyNSW2052 Australia Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing College of Electronic and Information Engineering Southwest University Chongqing400715 China Key Laboratory of Dependable Services Computing in Cyber Physical Society Ministry of Education College of Computer Science Chongqing University Chongqing400044 China Faculty of Computer Science and Control Engineering Shenzhen University of Advanced Technology Shenzhen518055 China

Privacy leakage and Byzantine failures are two adverse factors to the intelligent decision-making process of multiagent systems (MASs). Considering an unsafe MAS with these two issues, this paper targets the resolution of a class of nonconvex optimization problems under the Polyak-Lojasiewicz (P-L) condition. To address this problem, we first identify and construct the unsafe MAS model. Under this kind of unfavorable MASs, we mask the local gradients with Gaussian noises and adopt a resilient aggregation method self-centered clipping (SCC) to design a differentially private (DP) decentralized Byzantine-resilient algorithm, namely DP-SCC-PL, which simultaneously achieves differential privacy and Byzantine resilience. The convergence analysis of DP-SCC-PL is challenging since the convergence error can be contributed jointly by privacy-preserving and Byzantine-resilient mechanisms, as well as the nonconvex relaxation, which is addressed via seeking the contraction relationships among the disagreement measure of reliable agents before and after SCC aggregation, together with the optimal gap. Theoretical results reveal that DP-SCC-PL achieves consensus among all reliable agents and sublinear (inexact) convergence with well-designed step-sizes. It has also been proved that if there are no privacy issues and Byzantine agents, then the asymptotic exact convergence can be recovered. Numerical experiments verify the utility, resilience, and differential privacy of DP-SCC-PL by tackling a nonconvex optimization problem satisfying the P-L condition under various Byzantine attacks. Copyright © 2024, The Authors. All rights reserved.

关键词： Differential privacy

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