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arXiv 2024年

作者： Turishcheva, Polina Fahey, Paul G. Vystrčilová, Michaela Hansel, Laura Froebe, Rachel Ponder, Kayla Qiu, Yongrong Willeke, Konstantin F. Bashiri, Mohammad Baikulov, Ruslan Zhu, Yu Ma, Lei Yu, Shan Huang, Tiejun Li, Bryan M. De Wulf, Wolf Kudryashova, Nina Hennig, Matthias H. Rochefort, Nathalie L. Onken, Arno Wang, Eric Ding, Zhiwei Tolias, Andreas S. Sinz, Fabian H. Ecker, Alexander S. Institute of Computer Science University of Göttingen Campus Institute Data Science Germany Department of Neuroscience Center for Neuroscience and Artificial Intelligence Baylor College of Medicine HoustonTX United States Department of Ophthalmology Byers Eye Institute Stanford University School of Medicine StanfordCA United States Stanford Bio-X Stanford University StanfordCA United States Wu Tsai Neurosciences Institute Stanford University StanfordCA United States International Max Planck Research School for Intelligent Systems Tübingen Germany Institute for Bioinformatics and Medical Informatics Tübingen University Germany lRomul Russia Institute of Automation Chinese Academy of Sciences China Beijing Academy of Artificial Intelligence China The Alan Turing Institute United Kingdom School of Informatics University of Edinburgh United Kingdom Centre for Discovery Brain Sciences University of Edinburgh United Kingdom Simons Initiative for the Developing Brain University of Edinburgh United Kingdom Department of Electrical Engineering Stanford University StanfordCA United States Max Planck Institute for Dynamics and Self-Organization Göttingen Germany

Understanding how biological visual systems process information is challenging because of the nonlinear relationship between visual input and neuronal responses. Artificial neural networks allow computational neuroscientists to create predictive models that connect biological and machine vision. Machine learning has benefited tremendously from benchmarks that compare different model on the same task under standardized conditions. However, there was no standardized benchmark to identify state-of-the-art dynamic models of the mouse visual system. To address this gap, we established the SENSORIUM 2023 Benchmark Competition with dynamic input, featuring a new large-scale dataset from the primary visual cortex of ten mice. This dataset includes responses from 78,853 neurons to 2 hours of dynamic stimuli per neuron, together with the behavioral measurements such as running speed, pupil dilation, and eye movements. The competition ranked models in two tracks based on predictive performance for neuronal responses on a held-out test set: one focusing on predicting in-domain natural stimuli and another on out-of-distribution (OOD) stimuli to assess model generalization. As part of the NeurIPS 2023 competition track, we received more than 160 model submissions from 22 teams. Several new architectures for predictive models were proposed, and the winning teams improved the previous state-of-the-art model by 50%. Access to the dataset as well as the benchmarking infrastructure will remain online at ***. © 2024, CC BY-NC-ND.

关键词： Neurons

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Radio-Frequency Pseudo-Null Induced by Light in an Ion Trap

arXiv

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arXiv 2025年

作者： Chung, Daun Cha, Yonghwan Shon, Hosung Park, Jeonghyun Lee, Woojun Lee, Kyungmin Cho, Beomgeun Choi, Kwangyeul Kim, Chiyoon Yoo, Seungwoo Kim, Suhan Jeong, Uihwan Kang, Jiyong You, Jaehun Kim, Taehyun Dept. of Computer Science and Engineering Seoul National University Seoul08826 Korea Republic of Automation and Systems Research Institute Seoul National University Seoul08826 Korea Republic of NextQuantum Seoul National University Seoul08826 Korea Republic of Institute of Computer Technology Seoul National University Seoul08826 Korea Republic of Inter-University Semiconductor Research Center Seoul National University Seoul08826 Korea Republic of Institute of Applied Physics Seoul National University Seoul08826 Korea Republic of

In a linear radio-frequency (rf) ion trap, the rf null is the point of zero electric field in the dynamic trapping potential where the ion motion is approximately harmonic. When displaced from the rf null, the ion is superimposed by fast oscillations known as micromotion, which can be probed through motion-sensitive light-atom interactions. In this work, we report on the emergence of the rf pseudo-null, a locus of points where the ion responds to light as if it were at the true rf null, despite being displaced from it. The phenomenon is fully explained by accounting for the general two-dimensional structure of micromotion and is experimentally verified under various potential configurations, with observations in great agreement with numerical simulations. The rf pseudo-null manifests as a line in a two-dimensional parameter space, determined by the geometry of the incident light and its overlap with the motional structure of the ion. The true rf null occurs uniquely at the concurrent point of the pseudo-null lines induced by different light sources. © 2025, CC BY.

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Renewable Energy Power System Frequency Control by using PID controller and Genetic Algorithm 12

Renewable Energy Power System Frequency Control by using PID...

引用

12th IEEE PES Asia-Pacific Power and Energy engineering Conference, APPEEC 2020

作者： Liu, Lei Senjyu, Tomonobu Kato, Takeyoshi Mandal, Paras Hemeida, Ashraf M. Howlader, Abdul Motin Faculty of Engineering University of the Ryukyus Okinawa903-0213 Japan Institute of Materials An Systems Sustainability Nagoya University Furo-cho Chikusa-ku Nagoya Japan University of Texas at Ei Paso Texas Department of Electrical and Computer Engineering TX79968 United States Faculty of Energy Engineering Aswan University Electrical Engineering Department Egypt Smart Grid Research Lab University of California RiversideCA92521 United States

ISBN: (纸本)9781728157481

This work proposed a frequency control approach in a hybrid power system, which include Wind Generation(WG), Photovoltaic Generation(PV), Diesel Generation and storage battery. Proportional Integral Derivative(PID) controller was designed for the blade pitch system of wind turbine to improve the system dynamic performance. In addition, to minimize the oscillation of system, (Super-conducting Magnetic Energy Storage(SMES) with first order lead-lag controller was implemented, it would supply and absorb active power quickly to reach power generation/demand balance and thereby control system frequency. Minimization issues of frequency and wind output power deviations are considered as two objective function of PID controller of wind turbine. Also, frequency and diesel output power deviations are present as two objective functions of lead-lag controller of SMES. modified version of Non-dominated Sorting Genetic Algorithm(NSGA-II), was used to tune the parameters of controller. The robustness and effectiveness of the proposed method was verified by simulation using \mathrm{M}\mathrm{a}\mathrm{t}\mathrm{l}\mathrm{a}\mathrm{b}^{\mathrm{o}}/\mathrm{S}\mathrm{i}\mathrm{m}\mathrm{u}\mathrm{l}\mathrm{i}\mathrm{n}\mathrm{k}^{\mathrm{o}} From simulation results we examined the ability of the controllers to damp all frequency and output powers fluctuations and enhance the stability and reliability of system. © 2020 IEEE.

关键词： Genetic algorithms

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Multi-criteria GIS-based approach for optimal site selection of solar and wind energy

Unconventional Resources

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Unconventional Resources 2025年 7卷

作者： Nassar, Ahmed K. Al-Dulaimi, Omer Fakhruldeen, Hassan Falah Sapaev, I.B. Jabbar, Feryal Ibrahim Dawood, Imad Ibrahim Khalaf, Doaa H. Algburi, Sameer Policy Planning and Development Program Department of International Affairs College of Arts and Sciences Qatar University Doha Qatar Electrical Technical College Al-Farahidi University Baghdad Iraq Computer Techniques Engineering Department Faculty of Information Technology Imam Ja'afar Al-Sadiq University Baghdad 10011 Iraq Tashkent Institute of Irrigation and Agricultural Mechanization Engineers” National Research University Tashkent Uzbekistan Medical Physics Department College of Sciences Al-Mustaqbal University Babil 51001 Iraq Mazaya University College Iraq Design Department Al-Turath University College Baghdad Iraq College of Engineering Al-Kitab University Kirkuk 36015 Iraq

This research introduces a comprehensive multi-criteria geographic information system-based approach designed to determine optimal locations for solar and wind energy development by integrating geographic information system, multi-criteria decision analysis, and the analytical hierarchy process. The methodology enables spatial analysis that considers a wide range of environmental, economic, and technical factors, producing suitability maps that prioritize locations for renewable energy infrastructure. Applied to the geographic and climatic context of Iraq, the approach addresses the countries’ growing energy demands and infrastructure constraints by identifying regions with high renewable energy potential. the analysis resulted in 38.33 % of the total study area being suitable for utility-scale solar photovoltaic installations, 12.44 % for large-scale wind farms, and 34.47 % for small-scale solar photovoltaic projects. site selection criteria included solar irradiance, wind speed, terrain slope, ambient temperature, land use, elevation, and proximity to infrastructure such as roads and power lines. the study demonstrates the critical role of spatial decision-making tools in promoting sustainable energy strategies, especially within developing countries experiencing energy deficits and environmental pressures. © 2025 The Authors

关键词： Multi-criteria geographic information system-based approach Renewable energy Site selection Solar and wind energy Sustainability planning

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Elucidating the role of SLC4A7 in glioma prognosis: A comprehensive approach combining bioinformatics, single-cell analysis, and tissue validation

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Journal of Medical Sciences (Taiwan) 2023年第5期43卷 202-211页

作者： Liu, Tung Liu, Nien-Tzu Huang, Yu-Chuan Hsu, Wei-Wen Lin, Yu-Chieh Li, Yao-Feng Department of Pathology Tri-Service General Hospital National Defense Medical Center Taipei Taiwan School of Pharmacy and Institute Pharmacy National Defense Medical Center Taipei Taiwan Department of Research and Development National Defense Medical Center Taipei Taiwan Department of Computer Science and Information Engineering National Taitung University Taitung Taiwan Department of Pathology and Laboratory Medicine Taoyuan Armed Forces General Hospital Taoyuan Taiwan Graduate Institute of Medical Sciences National Defense Medical Center Taipei Taiwan Graduate Institute of Life Sciences National Defense Medical Center Taipei Taiwan

Background: Gliomas, prevalent and lethal brain tumors, present limited treatment options despite advancements in understanding their molecular features. SLC4A7, an SLC4 family member and potential biomarker, is involved in acid-base regulation, affecting cancer cell growth. Targeting this mechanism may offer new therapeutic strategies. Aim: This study examines SLC4A7's role in gliomas and its potential as a therapeutic target. Methods: Genomic, whole exon sequencing, and single-cell sequencing datasets from glioma patients were processed and analyzed, followed by gene set enrichment analysis (GSEA). Cellular components and immune cell populations were investigated using 12-cell state and CIBERSORT analyses. Tissue microarray and immunohistochemistry were employed, with an automated semi-quantitative system scoring staining. ANOVA determined the significance of immunostaining scores related to clinical parameters. Results: Our data found increased SLC4A7 in tumor components correlated with higher tumor grading and poorer prognosis. Immunohistochemistry confirmed a relationship between SLC4A7 protein expression with tumor grade and the proliferation index. GSEA linked high SLC4A7 to cell proliferation and inflammation signaling. PIK3CAs were identified as a potential upstream in IDH mutant glioma but not in IDH wildtype. A positive correlation between heightened SLC4A7 expression and tumor mutation burden suggested genomic instability's role in SLC4A7 upregulation. Cellular heterogeneity analysis highlighted the importance of inflammatory cells, particularly macrophage M0. Conclusion: This study emphasizes SLC4A7's significance in adult gliomas, associating increased expression with high tumor grade, poor prognosis, enhanced proliferation, and inflammation. Investigating SLC4A7 may provide insights into cancer biology and contribute to developing innovative therapeutic targets for improved brain tumor treatments. © 2023 Journal of Medical Sciences | Published by Wolt

关键词： Chinese glioma genome atlas CIBERSORT gene set enrichment analysis glioblastoma microsatellite instability single-cell sequencing SLC4A7 the cancer genome atlas tumor mutation burden

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Effects of Sulfate Attack Under Wet and Dry Cycles on Strength and Durability of Cement-Stabilized Laterite

SSRN

引用

SSRN 2022年

作者： Chindaprasirt, Prinya Kampala, Apichit Jitsangiam, Peerapong Sakdinakorn, Ratchanon Daprom, Pattawitchaya Kroehong, Wunchock Sustainable Infrastructure Research and Development Center Department of Civil Engineering Faculty of Engineering KhonKaen University Thailand Academy of Science Royal Society of Thailand Bangkok10300 Thailand Rail Systems Institute of Rajamangala University of Technology Isan Rajamangala University of Technology Isan Nakhon Ratchasima30000 Thailand Center of Excellence in Natural Disaster Management Department of Civil Engineering Faculty of Engineering Chiang Mai University Chiang Mai50200 Thailand College of Innovative Skills Institute of Interdisciplinary Studies Rajamangala University of Technology Isan Nakhon Ratchasima30000 Thailand Department of Civil Engineering Faculty of Industry and Technology Rajamangala University of Technology Isan Sakon Nakhon Campus Sakon Nakhon47160 Thailand Department of Civil Engineering Faculty of Engineering and Architecture Rajamangala University of Technology Tawan-ok Bangkok10330 Thailand

The designed cement content for laterite soil cement base or subbase for road construction can be estimated from the unconfined compressive strength (UCS) of the compressed cement-stabilized laterite soil sample. However, at the actual construction site, several factors such as sulfate and flood adversely affect the strength and durability of the soil cement. Consequently, the cement content estimation under a normal circumstance may not be sufficient. This research aimed to investigate the effects of wetting and drying cycles (w-d cycles) and sulfate-soaked cycles on the strength and durability of cement-stabilized laterite. The result indicated that the 4% cement content is suitable for the laterite stabilized cement. After 12 w-d cycles, the strength loss of the sample soils soaked in water and in sulfate were 44% and 55% respectively. The durability index (ID) of both sample soils decreased with the increase in the w-d cycles. For soil cement base soaked in water and sulfate, the durability index should be lower than 0.88 or the weight loss should not exceed 12%. the results also indicated that for practical propose, the normalized strengths under wet and dry cycles were related by a linear relationship for the range of tested cement content, water content, and curing periods. This relationship is very useful for the calculation of the desired strength from the estimated optimal cement content for the soil cement base mainly focusing on the durability against the effects of w-d cycles soaked in water and sulfate at any repeated cycles. © 2022, The Authors. All rights reserved.

关键词： Durability

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引用

2nd Spring International Conference on Defence Technology, ICDT 2020

作者： Zhu, W. Zuo, Z. Li, D. Tian, X. Luo, M. Shang, J. Li, D. Ding, X. Sun, Y. Zhang, Z. Zhang, B. Zhang, Z. School of Mechanical Engineering and Automation Beihang University Beijing100191 China State Key Laboratory of Manufacturing Systems Engineering Xi'An Jiaotong University Xi'an Shaanxi710049 China State Key Laboratory of Aerodynamics China Aerodynamics Research and Development Center Mianyang Sichuan621000 China Department of Dynamics Beijing Aeronautical Science and Technology Institute of COMAC Beijing102211 China

Wind tunnel testing is a reliable means for R&D aerial vehicles of aerospace, e.g. aircraft, missiles, rockets etc. The wind tunnel models are the objects used in the tests, and stiffness-similar models are important for the structural and aerodynamic design of aerospace vehicles. The accuracy and economy of the model design and fabrication have a significant impact on the quality and cycle of vehicle R&D. The review will first give an overview introduction of the wind tunnel models with stiffness-similarity, and then detail design procedure and fabrication processing, which are developed by the author's group based on 3D printing. The review can provide new methods to design and fabricate stiffness-similar models for wind tunnel tests for designers and researchers concerning the structural and aerodynamic studies in the aerospace industry. © Published under licence by IOP Publishing Ltd.

关键词： Stiffness

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Adaptive Decoding Mechanisms for UAV-enabled Double-Uplink Coordinated NOMA

arXiv

引用

arXiv 2022年

作者： Nguyen, Thanh Luan Kaddoum, Georges Do, Tri Nhu da Costa, Daniel Benevides Haas, Zygmunt J. Université du Québec MontréalQCH3C 1K3 Canada Cyber Security Systems and Applied AI Research Center Lebanese American University Lebanon The Technology Innovation Institute Masdar City Abu Dhabi9639 United Arab Emirates The Department of Computer Science University of Texas at Dallas RichardsonTX75080 United States The School of Electrical and Computer Engineering Cornell University IthacaNY14853 United States

In this paper, we propose a novel adaptive decoding mechanism (ADM) for the unmanned aerial vehicle (UAV)enabled uplink (UL) non-orthogonal multiple access (NOMA) communications. Specifically, considering a harsh UAV environment, where ground-to-ground links are regularly unavailable, the proposed ADM overcomes the challenging problem of conventional UL-NOMA systems whose performance is sensitive to the transmitter's statistical channel state information and the receiver's decoding order. To evaluate the performance of the ADM, we derive closed-form expressions for the system outage probability (OP) and system throughput. In the performance analysis section, we provide novel expressions for practical air-to-ground and ground-to-air channels, while taking into account the practical implementation of imperfect successive interference cancellation (SIC) in UL-NOMA. Moreover, the obtained expression can be adopted to characterize the OP of various systems under a Mixture of Gamma (MG) distribution-based fading channels. Next, we propose a sub-optimal Gradient Descent-based algorithm to obtain the power allocation coefficients that result in maximum throughput with respect to each location on UAV's trajectory. To determine the significance of the proposed ADM in nonstationary environments, we consider the ground users and the UAV to move according to the Random Waypoint Mobility (RWM) and Reference Point Group Mobility (RPGM) models, respectively. Accurate formulas for the distance distributions are also provided. Numerical solutions demonstrate that the ADM-enhanced NOMA not only outperforms Orthogonal Multiple Access (OMA), but also improves the performance of UAV-enabled UL-NOMA even in mobile environments. © 2022, CC BY.

关键词： Optimization

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Modulation characteristics of uncooled graphene photodetectors

arXiv

引用

arXiv 2021年

作者： Ryzhii, V. Ryzhii, M. Otsuji, T. Leiman, V. Mitin, V. Shur, M.S. Research Institute of Electrical Communication Tohoku University Sendai980-8577 Japan Institute of Ultra High Frequency Semiconductor Electronics of RAS Moscow117105 Russia Department of Computer Science and Engineering University of Aizu Aizu-Wakamatsu965-8580 Japan Center for Photonics and Two-Dimensional Materials Moscow Institute of Physics and Technology Dolgoprudny141700 Russia Department of Electrical Engineering University at Buffalo SUNY BuffaloNY1460-192 United States Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute TroyNY12180 United States

We analyze the modulation characteristics of the uncooled terahertz (THz) and infrared (IR) detectors using the variation of the density and effective temperature of the two-dimensional electron-hole plasma in uniform graphene layers (GLs) and perforated graphene layers (PGLs) due to the absorption of THz and IR radiation. The performance of the photodetectors (both the GLphotoresistor and the PGL-based barrier photodiodes) are compared. Their characteristics are also compared with the GL reverse-biased photodiodes. The obtained results allow to evaluate the ultimate modulation frequencies of these photodetectors and can be used for their optimization. Copyright © 2021, The Authors. All rights reserved.

关键词： Photons

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Adaptability evaluation of pavement structure to replacement treatment subgrade of black cotton soil

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Transportation Safety and Environment 2020年第1期2卷 69-80页

作者： Yingcheng Luan Yuan Ma Weiguang Zhang Yuqing Zhang Tao Ma Jusang Lee School of Transportation Southeast University2#Southeast University RoadJiangning DistrictNanjing 211189China Qilu Transportation Development Group No.1 Lg’ao West RdLixia DistrictJinan 250000China National Engineering Laboratory of Highway Maintenance Technology Changsha University of Science&TechnologyChangsha 410114China Aston Institute of Materials Research Engineering Systems&Management GroupAston UniversityBirminghamB47ETUK Indiana Department of Transportation West LafayetteIN 47906USA

Aiming at the typical engineering problem of black cotton soil(BCS)subgrade under the alternation of dry and wet climate in the region of Nairobi,Kenya,this paper takes the pavement structure as the research object,and the numerical calculation model of BCS subgrade is established based on the consolidation coupling theory of unsaturated *** the modulus and thickness of the subbase as variables,the deformation characteristics and additional stresses of different pavement structures are *** the adaptability of different pavement structures to replacement treatment subgrade of BCS is evaluated by gray incidence decision analysis *** results show that whatever the pavement structure is,neither subgrade modulus nor thickness is sensitive to the pavement surface deformation,and the deformation differences between each pavement structure are more obvious in wet season;the additional stress at control layer bottom and pavement surface decreases with the increase of subbase modulus,whereas the stress may increase at subbase bottom;the additional stress at subbase bottom,control layer bottom and pavement surface all decreases with the increase of subbase thickness for pavement Structure I and *** pavement Structure III,the change of subbase thickness is not sensitive to the additional stress at the control layer bottom and pavement surface,whereas the stress at subbase bottom increases with the increase of subbase *** is concluded that the most adaptable structure is pavement Structure I,which can minimize the comprehensive level of pavement settlement and additional stress.

关键词： black cotton soil pavement structure numerical calculation deformation additional stress

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