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International Youth Conference on Radio Electronics, Electrical and Power engineering (REEPE)

作者： A. Abu Zaid Ibrahim Abdelsalam M. I. Marei Electrical Power Systems Department College of Engineering & Technology Arab Academy for Science Technology & Maritime Transport Cairo Egypt Electrical and Control Department College of Engineering & Technology Arab Academy for Science Technology & Maritime Transport Cairo Egypt Electrical Power and Machines Department Faculty of Engineering Ain Shams University Cairo Egypt

This paper introduces a design for a photovoltaic (PV) pumping system that incorporates battery bank storage. A three-port DC-DC converter (TPC) is employed to integrate the PV, battery bank, and induction motor drive (IMD) based pumping system. The purpose of the battery bank is to provide support to the pump during shading conditions to prevent frequent suspension and down-thrust situations. Additionally, the proposed system aims to maintain the free-floating impeller operating range by imposing rotational speed limits on the pump. The input ports of the TPC consist of the PV port, which is controlled to harvest the maximum power point (MPP) using the perturb and observe technique, and the battery port. The output port is linked to a DC bus using passive rectifier to supply power to the variable speed V/F IMD. The battery port is regulated to sustain the DC bus voltage in a desired voltage range that ensures the impeller operation under free-floating conditions. The proposed system is simulated using MATLAB/Simulink software. The simulation results are discussed to evaluate the dynamic performance.

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Effect of Particle Size Distribution on the Transmission Efficiency of Atomized Water to the Tracheal Tube

SSRN

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SSRN 2023年

作者： Asakura, Takumi Yoshioka, Keisuke Ogawa, Ami Kurashina, Yuta School of Mechanical Engineering Graduate School of Science and Technology Tokyo University of Science Japan Department of System Design Engineering Faculty of Science and Technology Keio University Yokohama Japan Division of Advanced Mechanical Systems Engineering Institute of Engineering Tokyo University of Agriculture and Technology Japan

Ultrasonic atomization is a widely used technology. As the atomization device, lead zirconate titanate (PZT) and lithium niobate (LN) are comparatively investigated through experimental and numerical schemes. However, knowledge on a profitable scheme by which to efficiently deliver the atomized particles into the tracheal tube remains unclear. In this study, the physical difference of the transmission efficiency of water particles atomized by PZT and LN devices was measured. The water particles atomized by PZT and LN were injected into a human airway model including a nasal cavity and bronchial tube. The distribution of the amount of transmitted particles deposited at each of the monitoring positions was then estimated using the results of image analysis of color intensity. As a result, the atomized particles of the PZT device, which produced larger particles than the LN device, were more strongly affected by inertia and tended to be deposited at the area closer to the entrance of the nasal cavity. In contrast, the particles produced by the LN device tended to be transmitted deeper into the trachea. The experimental results indicated that the particle size distribution of PZT and LN, which have quite different maximum sizes of particles, largely influences the spatial distribution characteristics of particle deposition along the airway from the nasal cavity to the trachea. © 2023, The Authors. All rights reserved.

关键词： Particle size analysis

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advanced UAV photogrammetry for precision 3D modeling in GPS denied inaccessible tunnels

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Safety in Extreme Environments 2024年第4期6卷 269-287页

作者： Ikeda, Hajime Bibish, Baterdene Fissha, Yewuhalashet Sinaice, Brian Bino Toriya, Hisatoshi Adachi, Tsuyoshi Kawamura, Youhei Department of Systems Control and Information Engineering National Institute of Technology Asahikawa College 2-2-1-6 Syunkodai Hokkaido Asahikawa-city 0718142 Japan Graduate School of International Resources Akita University 1-1 Tegatagakuen Machi Akita Akita-City 0108502 Japan Faculty of Engineering Division of Sustainable Resources Hokkaido University 13jyounishi8 Kita-ku Hokkaido Sapporo-City 0608628 Japan North China Institute of Science and Technology Hebei Langfang 065201 China

Unmanned Aerial Vehicles (UAVs) have evolved into potent tools for both researchers and professionals. Their use has expanded significantly in recent years across diverse fields of research and engineering, primarily owing to their image-capturing capabilities. These capabilities offer benefits such as time efficiency, cost-effectiveness, minimal fieldwork, and high precision. This study focuses on harnessing UAVs’ photogrammetric technology to create a reliable and accurate 3D modeling process. By doing so, we assess the feasibility of modeling and mapping hard-to-access tunnels using imagery acquired from UAVs combined with photogrammetry. This approach consistently provided a faithful representation of the environment under study. Three distinct experiments underpin this research. The first aims to construct a 3D model using a singular directional light source, evaluating its precision in a concrete tunnel setting. The second experiment involves crafting a 3D model of an underground sewer tunnel using both unidirectional and omnidirectional light sources. The final experiment leverages the insights from the preceding tests to create a 3D model via a specially-designed UAV system, gauging the accuracy of this 3D photogrammetric model within what is termed in this study as a "pedestrian tunnel." However, there are inherent challenges to this approach. For instance, augmenting a drone with additional equipment changes its weight distribution, potentially compromising its stability. An improperly balanced payload could result in uneven flight patterns, rendering the UAV harder to manage. © The Author(s) 2024.

关键词： Inaccessible tunnel mapping Payload balance challenges Photogrammetric analysis Subterranean 3D modeling Unmanned Aerial Vehicles (UAVs)

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Efficacy of Local Cache for Performance Improvement of Reliable Data Transmission in Aggregated Robot Processing Architecture

Efficacy of Local Cache for Performance Improvement of Relia...

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International Conference on control, Automation and systems ( ICCAS)

作者： Abdul Jalil Jun Kobayashi Department of Computer Science and Systems Engineering Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka Japan Department of Intelligent and Control Systems Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka Japan

This study aims to improve the performance of message data transmission in Aggregated Robot Processing (ARP) architecture where the RELIABLE option of the RELIABILITY QoS (Quality of Service) policy is applied to a ROS 2 (Robot Operating System 2) node communication. Basically, the RELIABLE option guarantees that a publisher properly send all message data to a subscriber. However, the publisher could fail to transmit some message data to the subscriber even in the RELIABLE QoS option unless the buffer size of the publisher is enough. We introduce local cache to a sensing component to alleviate the issue in the case that the sensors output the same value in a row. The experimental results showed that the local cache improved the latency and reduced the message loss in node communication.

关键词： Performance evaluation Operating systems Process control Quality of service Robot sensing systems control systems Sensors

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Target-oriented Reference Construction for supervised cell type identification in scRNA-seq

Target-oriented Reference Construction for supervised cell t...

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IEEE International Conference on Bioinformatics and Biomedicine (BIBM)

作者： Xin Wei Wenjing Ma Zhijin Wu Hao Wu Department of Biostatistics Brown University Department of Biostatistics University of Michigan Ann Arbor Faculty of Computer Science and Control Engineering Shenzhen University of Advanced Technology Shenzhen China Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China

ISBN: (数字)9798350386226

ISBN: (纸本)9798350386233

Cell type identification is a crucial step in single-cell RNA-seq (scRNA-seq) data analysis. The supervised cell type identification method is a preferred solution due to its accuracy and efficiency. The performance of such methods highly depends on the quality of the reference data. Although there are many supervised cell type identification tools, no method currently exists for constructing reference data. Here, we develop Target-Oriented Reference Construction (TORC), a widely applicable strategy for constructing references based on target datasets in scRNA-seq supervised cell type identification. TORC focuses on alleviating differences in cell type composition between the reference and target sets. Extensive benchmarks on simulated and real data analyses demonstrate consistent improvements in cell type identification with TORC.

关键词： Accuracy Data analysis Neural networks Benchmark testing Classification algorithms Complexity theory Bioinformatics

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On the Existence and Uniqueness of Steady State Solutions of a Class of Dynamic Hydraulic Networks via Actuator Placement

On the Existence and Uniqueness of Steady State Solutions of...

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IEEE Conference on Decision and control

作者： Mark Jeeninga Juan E. Machado Michele Cucuzzella Giacomo Como Jacquelien Scherpen Department of Automatic Control Lund University Lund Sweden Chair of Control Systems and Network Control Technology Faculty 3 Mechanical Engineering Electrical and Energy Systems Brandenburg University of Technology Cottbus - Senftenberg Cottbus Germany Department of Electrical Computer Science and Biomedical Engineering Univeristy of Pavia Pavia Italy Department of Mathematical Science “G.L. Lagrange” Politecnico di Torino Torino Italy Department of Automatic Control Lund University Faculty of Science and Engineering Jan C. Willems Center for Systems and Control ENTEG University of Groningen Groningen the Netherlands

In this paper, using tools from graph theory we provide verifiable necessary and sufficient conditions for the existence of a unique hydraulic equilibrium in district heating systems of meshed topology and containing multiple heat sources. Even though numerous publications have addressed the design of efficient algorithms for numerically finding hydraulic equilibria in the general context of water distribution networks, this is not the case for the analysis of existence and uniqueness. Moreover, most of the existing work dealing with these aspects exploit the equivalence between the nonlinear algebraic equations describing the hydraulic equilibria and the KKT conditions of a suitably defined nonlinear convex optimization problem. Differently, this paper proposes necessary and sufficient graph-theoretic conditions on the actuator placement for the existence and uniqueness of a hydraulic equilibrium, independent of the actuators' control objective. An example based on a representative district heating network is considered to illustrate the key aspects of our contribution, and an explicit formulation of the steady state solution is given for the case in which pressure drops through pipes are linear with respect to the flow rate.

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The missing base molecules in atmospheric acid-base nucleation

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National science Review 2022年第10期9卷 196-208页

作者： Runlong Cai Rujing Yin Chao Yan Dongsen Yang Chenjuan Deng Lubna Dada Juha Kangasluoma Jenni Kontkanen Roope Halonen Yan Ma Xiuhui Zhang Pauli Paasonen Tuukka Pet?j? Veli-Matti Kerminen Yongchun Liu Federico Bianchi Jun Zheng Lin Wang Jiming Hao James N.Smith Neil M. Donahue Markku Kulmala Douglas R.Worsnop Jingkun Jiang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Institute for Atmospheric and Earth System Research/Physics Faculty of Science University of Helsinki Aerosol and Haze Laboratory Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science and Technology Laboratory of Atmospheric Chemistry Paul Scherrer Institute Center for Joint Quantum Studies and Department of Physics School of Science Tianjin University Key Laboratory of Cluster Science Ministry of Education of China School of Chemistry and Chemical Engineering Beijing Institute of Technology Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Department of Environmental Science and Engineering Fudan University Chemistry Department University of California Center for Atmospheric Particle Studies Carnegie Mellon University Department of Chemistry Carnegie Mellon University Aerodyne Research Inc.

Transformation of low-volatility gaseous precursors to new particles affects aerosol number concentration,cloud formation and hence the *** clustering of acid and base molecules is a major mechanism driving fast nucleation and initial growth of new particles in the ***,the acid-base cluster composition,measured using state-of-the-art mass spectrometers,cannot explain the measured high formation rate of new *** we present strong evidence for the existence of base molecules such as amines in the smallest atmospheric sulfuric acid clusters prior to their detection by mass *** demonstrate that forming（H2SO4）1（amine）1is the rate-limiting step in atmospheric H2SO4-amine nucleation and the uptake of（H2SO4）1（amine）1is a major pathway for the initial growth of *** proposed mechanism is very consistent with measured new particle formation in urban Beijing,in which dimethylamine is the key base for H2SO4nucleation while other bases such as ammonia may contribute to the growth of larger *** findings further underline the fact that strong amines,even at low concentrations and when undetected in the smallest clusters,can be crucial to particle formation in the planetary boundary layer.

关键词： new particle formation acid-base nucleation aerosol polluted urban environment

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Ambient ammonia production via electrocatalytic nitrite reduction catalyzed by a CoP nanoarray

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Nano Research 2022年第2期15卷 972-977页

作者： Guilai Wen Jie Liang Qian Liu Tingshuai Li Xuguang An Fang Zhang Abdulmohsen Ali Alshehri Khalid Ahmed Alzahrani Yonglan Luo Qingquan Kong Xuping Sun Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province School of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Institute for Advanced Study Chengdu UniversityChengdu 610106China National Engineering Research Center for Nanotechnology No.28 East Jiang Chuan RoadShanghai 200241China Chemistry Department Faculty of ScienceKing Abdulaziz UniversityP.O.Box 80203Jeddah21589Saudi Arabia

Industrial-scale ammonia(NH_(3))production mainly relies on the energy-intensive and environmentally unfriendly Haber-Bosch *** issue can be avoided by electrocatalytic N_(2) reduction which however suffers from limited current efficiency and NH3 ***,we demonstrate ambient NH_(3) production via electrochemical nitrite(NO_(2)^(-))reduction catalyzed by a CoP nanoarray on titanium mesh(CoP NA/TM).When tested in 0.1 M PBS(pH=7)containing 500 ppm N0_(2)^(-),such CoP NA/TM is capable of affording a large NH_(3) yield of 2,260.7±51.5μg·h^(-1)·cm^(-2) and a high Faradaic efficiency of 90.0±2.3%at-0.2 V vs.a reversible hydrogen *** functional theory calculations reveal that the potential-determining step for NO_(2)^(-)reduction over CoP(112)is*NO2→*NO_(2)H.

关键词： CoP nanoarray NO_(2)^(-)reduction reaction ambient NH_(3)synthesis electrocatalysis density functional theory

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Stochastic Optimal Investment Strategy for Net-Zero Energy Houses

arXiv

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arXiv 2023年

作者： Li, Mengmou Tanaka, Taichi Carnerero, A. Daniel Wasa, Yasuaki Hirata, Kenji Fujisaki, Yasumasa Ushifusa, Yoshiaki Hatanaka, Takeshi Department of Systems and Control Engineering School of Engineering Tokyo Institute of Technology Tokyo152-8550 Japan Department of Electrical Engineering and Bioscience School of Advanced Science and Engineering Faculty of Science and Engineering Waseda University Tokyo169-8555 Japan Department of Electrical and Electronic Engineering School of Engineering University of Toyama Toyama930-8555 Japan Department of Information and Physical Sciences Graduate School of Information Science and Technology Osaka University Osaka565 0871 Japan Faculty of Economics and Business Administration The University of Kitakyushu Fukuoka802-8577 Japan

In this research, we investigate Net-Zero Energy Houses (ZEH), which harness regionally produced electricity from photovoltaic (PV) panels and fuel cells, integrating them into a local power system in pursuit of achieving carbon neutrality. This paper examines the impact of electricity sharing among users who are working towards attaining ZEH status through the integration of PV panels and battery storage devices. We propose two potential scenarios: the first assumes that all users individually invest in storage devices, hence minimizing their costs on a local level without energy sharing;the second envisions cost minimization through the collective use of a shared storage device, managed by a central manager. These two scenarios are formulated as a stochastic convex optimization and a cooperative game, respectively. To tackle the stochastic challenges posed by multiple random variables, we apply the Monte Carlo sample average approximation (SAA) to the problems. To demonstrate the practical applicability of these models, we implement the proposed scenarios in the Jono neighborhood in Kitakyushu, Japan. Copyright © 2023, The Authors. All rights reserved.

关键词： Stochastic systems

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ACES: Evaluating Automated Audio Captioning Models on the Semantics of Sounds

arXiv

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arXiv 2024年

作者： Wijngaard, Gijs Formisano, Elia Giordano, Bruno L. Dumontier, Michel Department of Advanced Computing Sciences Faculty of Science and Engineering Maastricht University Netherlands Department of Cognitive Neuroscience Faculty of Psychology and Neuroscience Maastricht Centre for Systems Biology Faculty of Science and Engineering Brightlands Institute for Smart Society Maastricht University Netherlands Institut des Neurosciences de La Timone UMR 7289 CNRS Université Aix-Marseille France

Automated Audio Captioning is a multimodal task that aims to convert audio content into natural language. The assessment of audio captioning systems is typically based on quantitative metrics applied to text data. Previous studies have employed metrics derived from machine translation and image captioning to evaluate the quality of generated audio captions. Drawing inspiration from auditory cognitive neuroscience research, we introduce a novel metric approach – Audio Captioning Evaluation on Semantics of Sound (ACES). ACES takes into account how human listeners parse semantic information from sounds, providing a novel and comprehensive evaluation perspective for automated audio captioning systems. ACES combines semantic similarities and semantic entity labeling. ACES outperforms similar automated audio captioning metrics on the Clotho-Eval FENSE benchmark in two evaluation categories. © 2024, CC BY.

关键词： Semantics

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