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Congress on Evolutionary Computation

作者： Tomohiro Harada Kei Murano Ruck Thawonmas Faculty of System Design Tokyo Metropolitan University Tokyo Japan Graduate School of Information Science and Engineering Ritsumeikan University Shiga Japan College of Information Science and Engineering Ritsumeikan University Shiga Japan

ISBN: (数字)9781728169293

ISBN: (纸本)9781728169309

Multimodal program optimizations (MMPOs) have been studied in recent years. MMPOs aims at obtaining multiple optimal programs with different structures simultaneously. This paper proposes novel MMPO benchmark problems to evaluate the performance of the multimodal program search algorithms. In particular, we propose five MMPOs, which have different characteristics, the similarity between optimal programs, the complexity of optimal programs, and the number of local optimal programs. We apply multimodal genetic programming (MMGP) proposed in our previous work to the proposed MMPOs to verify their difficulty and effectiveness, and evaluate the performance of MMGP. The experimental results reveal that the proposed MMPOs are difficult and complex to obtain the global and local optimal programs simultaneously as compared to the conventional benchmark. In addition, the experimental results clarify mechanisms to improve the performance of MMGP.

关键词： Benchmark testing Optimization Genetic programming Clustering algorithms Sociology Statistics Complexity theory

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A stopping rule for multi-agent consensus with bounded noise in measurements

A stopping rule for multi-agent consensus with bounded noise...

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SICE International Symposium on Control systems (ISCS)

作者： Kenta Hanada Takayuki Wada Izumi Masubuchi Toru Asai Yasumasa Fujisaki Graduate School of Information Science and Technology Osaka University Suita Japan Graduate School of System Informatics Kobe University Kobe Japan Graduate School of Engineering Nagoya University Nagoya Japan

ISBN: (数字)9784907764647

A multi-agent based averaging consensus algorithm is investigated over noisy undirected connected graphs. It is assumed that each agent can know measurements of the neighbors' state with bounded errors. A rigorous stopping rule which reveals an explicit relation between the number of iterations and the closeness of the agreement with a probabilistic guarantee is established based on a matrix Bernstein inequality. The result is illustrated through a numerical example.

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Hospital Admission Risks and Excess Costs for Neurological Symptoms Attributable to Long-Term Exposure to Fine Particulate Matter in New York State, USA

SSRN

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SSRN 2023年

作者： Min, Jieun Lee, Whanhee Bell, Michelle L. Kim, Yijun Heo, Seulkee Kim, Ga Eun Kim, Jee Hyun Yun, Ji Young Kim, Soo In Schwartz, Joel Ha, Eunhee Department of Environmental Medicine School of Medicine Ewha Womans University Seoul Korea Republic of Graduate Program in System Health Science and Engineering College of Medicine Ewha Womans University Seoul Korea Republic of Ewha Womans University College of Medicine Seoul Korea Republic of School of Biomedical Convergence Engineering College of Information and Biomedical Engineering Pusan National University Yangsan Korea Republic of Yale School of the Environment Yale University New HavenCT United States Department of Psychiatry Ewha Womans University Mokdong Hospital Ewha Womans University College of Medicine Seoul Korea Republic of Department of Neurology Ewha Womans University Seoul Hospital Ewha Womans University College of Medicine Seoul Korea Republic of Department of Environmental Health Harvard T H Chan School of Public Health BostonMA United States Department of Medical Science Ewha Womans University School of Medicine Ewha Medical Research Institute Seoul Korea Republic of

Background: Although emerging evidence suggests that PM2.5 is linked to neurological symptoms (NSs) via neuroinflammation, relevant studies are scarce. This study aimed to investigate the risks and excess costs of hospital admission for five NSs—fatigue, headache, dizziness, convulsion, and paralysis—attributable to long-term exposure to PM2.5 in New York State, ***: We analyzed the New York Statewide Planning and Research Cooperative system (SPARCS) from 2010 to 2016. A Bayesian hierarchical model with integrated nested Laplace approximations was performed to estimate the risks and excess costs of hospital admission for NSs due to long-term exposure to PM2.5 at the county ***: A 1 µg/m3 increase in lag 0–1 years PM2.5 was associated with an increased risk of headache and convulsion by 1.06 (1.01, 1.11) and 1.04 (1.01, 1.06), respectively. The excess hospital admission cost for five NSs attributable to lag 0–1 years PM2.5 above the new World Health Organization guideline (annual standard: 5 µg/m3) was $200.24 (95% CI: 6.00, 376.96) million during 2011–2016, recording the highest for convulsion ($153.73 [95% CI: 63.61, 244.19] million).Conclusions: This study provides quantitative estimates of risks and excess costs for NSs attributable to long-term PM2.5 and suggests that policies that reduce long-term PM2.5 concentration in accordance with the new WHO air quality guidelines can yield substantial health and economic benefits related to NSs in the New York State population. © 2023, The Authors. All rights reserved.

关键词： Hierarchical systems

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Self-Organized Criticality Explains Readiness Potential

arXiv

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arXiv 2022年

作者： Kagaya, Katsushi Kubota, Tomoyuki Nakajima, Kohei Faculty of Engineering National University Corporation Hokkaido Higher Education and Research System Kitami Institute of Technology 165 Koen-cho Kitami Hokkaido Japan The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-8656 Japan Graduate School of Information Science and Technology The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-8656 Japan

Readiness potential is a widely observed brain activity in several species including crayfish before the spontaneous behavioral initiation. However, it is poorly understood how this spontaneous activity is generated. The hypothesis that some specific, dedicated site is responsible for the spontaneity has been questioned. Here, by using intracellular recording and staining of the brain neurons in crayfish and modeling using the sandpile, which is the original model of self-organized criticality (SOC), we show that readiness potential can emerge everywhere in the brain because it is a SOC system. Despite the diversity in neurons and their morphology, brain neurons showed signatures of criticality and readiness potential. We find that the previously known readiness potential in a neuron is a consequence of the critical behavior of the entire network. Indeed, seemingly unrelated membrane potential activity in neurons in different animals can shape readiness potential when its time series are averaged after their alignment with respect to the spontaneous behavioral initiation. We show that the sandpile model not made for the potential, can form the premovement buildup activity similar to readiness potential. Scaling properties of the synaptic avalanches are in line with those of vertebrate species;thus, not only is the critical brain hypothesis supported in crayfish, but our findings might also provide a unified view of the basis of spontaneity in animal behavior. © 2022, CC BY.

关键词： Invertebrates

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Evaluation of Five Atmospheric Correction Algorithms for Multispectral Remote Sensing Data Over Plateau Lakes

SSRN

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SSRN 2024年

作者： Wang, Dong Tang, Bo-Hui Li, Zhao-Liang Faculty of Land Resources Engineering Kunming University of Science and Technology Kunming650093 China Key Laboratory of Plateau Remote Sensing Department of Education of Yunnan Province Kunming China Southwest United Graduate School Kunming China State Key Lab of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China Key Laboratory of Agricultural Remote Sensing Ministry of Agriculture and Rural Affairs Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China

Comparing atmospheric correction (AC) algorithms in remote sensing image processing and assessing their accuracy and suitability for water atmospheric correction are essential steps for acquiring inland water color remote sensing (WCRS) data. Data acquired from Sentinel-2 Multi Spectral Imager (MSI) and Sentinel-3 Ocean and Land Color Instrument (OLCI) sensors were used to compare the effects of five algorithms: the Acolite, the Case 2 Regional Coast Color (C2RCC), the Fast Line-of-sight Atmospheric Analysis of Hypercubes (FLAASH), the Image correction for atmospheric effects (iCOR), and the Level 2 generator (L2gen), across different spectral bands. In-situ measurements at Erhai Lake in the Plateau Lakes (PL) validate that the Acolite algorithm excels in the red band of MSI sensor, while C2RCC algorithm differs notably in blue and green bands. FLAASH performs better in OLCI sensors than MSI, but iCOR is affected by higher resolution images, causing over-correction on lower spatial resolution OLCI sensors. L2gen yields concentrated data amplitude in correction results. The optimal algorithm types in the four visible wavelengths are shown through the radar map. In addition, the influence of field sampling time difference on the spectrum is verified through the experiment of satellite-ground synchronization. For the same sensor, the influence of time difference on the atmospheric correction spectrum is about 3%. These findings are crucial for selecting appropriate correction methods, enhancing the accuracy of remote sensing in PL, especially in water monitoring and environmental research. They also aid in establishing quantitative relationships between varying spatial resolutions in remote sensing images. © 2024, The Authors. All rights reserved.

关键词： Lakes

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Piggy-back Network to enable Beyond 5G Society supported by Autonomous Mobilities: : Evaluation of End-to-End Throughput on Optimized Piggy-back Networks

Piggy-back Network to enable Beyond 5G Society supported by ...

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International Symposium on Wireless Personal Multimedia Communications (WPMC)

作者： Kazuki Kuwata Yozo Shoji Mikio Hasegawa Yusuke Ito Yoshito Watanabe Aohan Li So Hasegawa Graduate School of Engineering Tokyo University of Science 6-3-1 Niijuku Katsushika-Ku Tokyo Japan Social-ICT System Laboratory National Institute of Information and Communications Technology 4-2-1 Nukui-Kitamachi Koganei Tokyo Japan

ISBN: (纸本)9781665427616

As one of the technologies to enable Beyond 5G society, a Piggy-back Network has been proposed as a communication system based on Store-Carry-Forwarding with high-speed millimeter-wave links. In this paper, we evaluate the end-to-end throughput of optimized Piggy-back Networks. We formulate optimization of the data transfer route in the Piggy-back Network as a pickup and delivery problem and apply a heuristic optimization algorithm to the formulated problem. The results show that the optimized Piggy-back Network enables high throughput even for long-distance communication.

关键词： Wireless communication 5G mobile communication Simulation Millimeter wave technology Throughput Resource management Multimedia communication

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Carrier conversion from terahertz wave to dual-wavelength near-infrared light injection-locking to optical comb using asynchronous nonpolarimetric electro-optic downconversion with electro-optic polymer modulator

arXiv

引用

arXiv 2023年

作者： Matsumura, Yudai Tokizane, Yu Hase, Eiji Kuse, Naoya Minamikawa, Takeo Fujikata, Jun-Ichi Kishikawa, Hiroki Haraguchi, Masanobu Okamura, Yasuhiro Kaji, Takahiro Otomo, Akira Morohashi, Isao Kanno, Atsushi Hisatake, Shintaro Yasui, Takeshi Graduate School of Sciences and Technology for Innovation Tokushima University Tokushima Tokushima770-8506 Japan Tokushima University Tokushima Tokushima770-8506 Japan PRESTO Japan Science and Technology Agency Saitama Kawaguchi332-0012 Japan Center for Higher Education and Digital Transformation University of Yamanashi Yamanashi Kofu400-8510 Japan National Institute of Information and Communications Technology Koganei Tokyo184-8795 Japan Department of Electrical and Mechanical Engineering Nagoya Institute of Technology Aichi Nagoya466-8555 Japan Electrical and Energy System Engineering Division Gifu University Gifu Gifu501-1193 Japan

THz waves are promising wireless carriers for next-generation wireless communications, where a seamless connection from wireless to optical communication is required. In this study, we demonstrate carrier conversion from THz waves to dual-wavelength NIR light injection-locking to an optical frequency comb using asynchronous nonpolarimetric electro-optic downconversion with an electro-optic polymer modulator. THz wave in the W band was obtained as a stable photonic RF beat signal of 1 GHz with a signal-to-noise ratio of 25 dB via the proposed THz-to-NIR carrier conversion. In addition, the results imply the potential of the photonic detection of THz waves for wireless-to-optical seamless communication. © 2023, CC BY.

关键词： Terahertz waves

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Plasma preparation method and tribological properties of diamond-like carbon coating on magnesium alloy AZ31 substrate

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science China(Technological sciences) 2019年第11期62卷 1939-1947页

作者： HAN BeiBei JU DongYing SATO Susumu ZHAO HuiJun Department of Electronic Engineering Graduate School of EngineeringSaitama Institute of TechnologyFukaya 369-0293Japan Advanced Science Institute Saitama Institute of TechnologyFukaya 369-0293Japan Ningbo Institute of Materials Industry Innovation Ningbo 315033China School of Mechanical Engineering Hangzhou Dianzi UniversityHangzhou 310018China Department of Information System Saitama Institute of TechnologyFukaya 369-0293Japan

Magnesium alloys are light weight and exhibit good recyclability but suffer from low hardness and wear *** this study,the hardness and wear resistance of AZ31 magnesium alloy were improved by depositing diamond-like carbon(DLC)films as hard protective coatings using ion-beam-enhanced deposition with various CH4/H2 ratio,gas flow rates and accelerating *** supporting effect of the magnesium alloy was enhanced by the production of a graded interfacial layer which is composed of film atoms and substrate *** composition and mechanical properties of the DLC coatings were characterized using scanning electron microscopy(SEM),Raman spectroscopy,Rockwell test and *** tribological properties of the coating were also investigated using a frictional surface microscope with an in situ observation system and friction force *** DLC films were characterized by a lower intensity ratio of the D-peak to G-peak(ID/IG),higher hardness,and improved tribological properties when deposited at a lower accelerating voltage(6 kV).At the CH4/H2 ratio of 1:99 and 6 sccm/6 kV,minimum ID/IG values of 0.62,relatively low friction force value of 0.12 N,and a maximum hardness of 4056HV were attained *** addition,the DLC film exhibited improved wear resistance and a shallower wear track at this condition.

关键词： DLC film magnesium alloy plasma preparation hardness wear resistance

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Fluctuating risk of acute kidney injury-related mortality for four weeks after exposure to air pollution: A multi-country time-series study in 6 countries

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Environment International 2024年 183卷 108367页

作者： Min, Jieun Kang, Duk-Hee Kang, Cinoo Bell, Michelle L. Kim, Ho Yang, Juyeon Gasparrini, Antonio Lavigne, Eric Hashizume, Masahiro Kim, Yoonhee Fook Sheng Ng, Chris Honda, Yasushi das Neves Pereira da Silva, Susana Madureira, Joana Leon Guo, Yue Pan, Shih-Chun Armstrong, Ben Sera, Francesco Masselot, Pierre Schwartz, Joel Maria Vicedo-Cabrera, Ana Pyo Lee, Jung Al-Aly, Ziyad Won Lee, Jung Kwag, Youngrin Ha, Eunhee Lee, Whanhee Department of Environmental Medicine College of Medicine Ewha Womans University Seoul Korea Republic of Graduate Program in System Health Science and Engineering College of Medicine Ewha Womans University Seoul Korea Republic of Division of Nephrology Department of Internal Medicine Ewha Womans University School of Medicine Ewha Medical Research Center Seoul Korea Republic of Department of Public Health Sciences Graduate School of Public Health Seoul National University Seoul Korea Republic of Yale School of the Environment Yale University New HavenCT United States Biostatistics Collaboration Unit Yonsei University College of Medicine Seoul Korea Republic of Lab Department of Public Health Environments and Society London School of Hygiene & Tropical Medicine London United Kingdom School of Epidemiology & Public Health Faculty of Medicine University of Ottawa Ottawa Canada Department of Global Health Policy Graduate School of Medicine The University of Tokyo Tokyo Japan Department of Global Environmental Health Graduate School of Medicine University of Tokyo Tokyo Japan School of Tropical Medicine and Global Health Nagasaki University Nagasaki Japan Center for Climate Change Adaptation National Institute for Environmental Studies Tsukuba Japan Department of Epidemiology Instituto Nacional de Saúde Dr. Ricardo Jorge Lisbon Portugal EPIUnit-Institute of Public Health University of Porto Porto Portugal Porto Portugal College of Medicine and NTU Hospital Taipei Taiwan National Institute of Environmental Health Science National Health Research Institutes Zhunan Taiwan Department of Public Health Environments and Society London School of Hygiene & Tropical Medicine London United Kingdom Department of Statistics Computer Science and Applications "G. Parenti" University of Florence Florence Italy Department of Environmental Health Harvard T.H. Chan School of Public Health BostonMA United States Institute of Social and Preventive Medicine Universi

Background: Recent studies have reported that air pollution is related to kidney diseases. However, the global evidence on the risk of death from acute kidney injury (AKI) owing to air pollution is limited. Therefore, we investigated the association between short-term exposure to air pollution—particulate matter ≤ 2.5 μm (PM2.5), ozone (O3), and nitrogen dioxide (NO2)—and AKI-related mortality using a multi-country dataset. Methods: This study included 41,379 AKI-related deaths in 136 locations in six countries during 1987–2018. A novel case time-series design was applied to each air pollutant during 0–28 lag days to estimate the association between air pollution and AKI-related deaths. Moreover, we calculated AKI deaths attributable to non-compliance with the World Health Organization (WHO) air quality guidelines. Results: The relative risks (95% confidence interval) of AKI-related deaths are 1.052 (1.003, 1.103), 1.022 (0.994, 1.050), and 1.022 (0.982, 1.063) for 5, 10, and 10 µg/m3 increase in lag 0–28 days of PM2.5, warm-season O3, and NO2, respectively. The lag-distributed association showed that the risk appeared immediately on the day of exposure to air pollution, gradually decreased, and then increased again reaching the peak approximately 20 days after exposure to PM2.5 and O3. We also found that 1.9%, 6.3%, and 5.2% of AKI deaths were attributed to PM2.5, warm-season O3, and NO2 concentrations above the WHO guidelines. Conclusions: This study provides evidence that public health policies to reduce air pollution may alleviate the burden of death from AKI and suggests the need to investigate the several pathways between air pollution and AKI death. © 2023 The Author(s)

关键词： Air quality

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Room temperature charge-to-spin conversion from q-2DEG at SrTiO3-based interfaces

arXiv

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arXiv 2022年

作者： Shashank, Utkarsh Deka, Angshuman Fukuma, Yasuhiro Ye, Chen Wang, X. Renshaw Gupta, Surbhi Rawat, Rajdeep Singh Medwal, Rohit Asada, Hironori Department of Physics and Information Technology Faculty of Computer Science and System Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka820-8502 Japan Birck Nanotechnology Center School of Electrical and Computer Engineering Purdue University West LafayetteIN47907 United States Research Center for Neuromorphic AI hardware Kyushu Institute of Technology Kitakyushu808-0196 Japan School of Physical and Mathematical Sciences Nanyang Technological University 637616 Singapore School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore Natural Science and Science Education National Institute of Education Nanyang Technological University 637616 Singapore Department of Physics Indian Institute of Technology Kanpur Kanpur208016 India Graduate School of Sciences and Technology for Innovation Yamaguchi University 2-16-1 Tokiwadai Ube755-8611 Japan

Interfacial two-dimensional electron gas (2DEG), especially the SrTiO3-based ones at the unexpected interface of insulators, have emerged to be a promising candidate for efficient charge-spin current interconversion. In this article, to gain insight into the mechanism of the charge-spin current interconversion at the oxide-based 2DEG, we focused on conducting interfaces between insulating SrTiO3 and two types of aluminium-based amorphous insulators, namely SrTiO3/AlN and SrTiO3/Al2O3, and estimated their charge-spin conversion efficiency, θcs. The two types of amorphous insulators were selected to explicitly probe the overlooked contribution of oxygen vacancy to the θcs. We proposed a mechanism to explain results of spin-torque ferromagnetic resonance (ST-FMR) measurements and developed an analysis protocol to reliably estimate the θcs of the oxide based 2DEG. The resultant θcs/t, where t is the thickness of the 2DEG, were estimated to be 0.244 nm-1 and 0.101 nm-1 for the SrTiO3/AlN and SrTiO3/Al2O3, respectively, and they are strikingly comparable to their crystalline counterparts. Furthermore, we also observe a large direct current modulation of resonance linewidth in SrTiO3/AlN samples, confirming its high θcs and attesting an oxygen-vacancy-enabled charge-spin conversion. Our findings emphasize the defects' contribution to the charge-spin interconversion, especially in the oxide-based low dimensional systems, and provide a way to create and enhance charge-spin interconversion via defect engineering. Copyright © 2022, The Authors. All rights reserved.

关键词： Aluminum compounds

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