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International Conference on Intelligent and Fuzzy Systems, INFUS 2020

作者： Mercan, Öykü Berfin Kılıç, Volkan Electrical and Electronics Engineering Graduate Program Izmir Katip Celebi University Izmir Turkey

ISBN: (纸本)9783030511555

The recent advances in smartphone technology have led to the emergence of simple, low-cost and portable platforms that aim reliable qualitative and quantitative analysis of colored solutions. In this paper, we present a new approach based on fuzzy classification for quantitative detection of peroxide relying on color change due to concentration level. The proposed fuzzy classification algorithm was integrated with a smartphone via a cloud system. Our custom-designed Android application was developed with a user-friendly interface to allow the users to capture the image of peroxide strips and crop the region of interest on the image for quantification. Average RGB (Red-Green-Blue) values in the cropped region were calculated to transfer these values to our proposed fuzzy logic classifier via a cloud system to quantify the peroxide content. The proposed fuzzy classifier evaluates the concentration value based on RGB values and sends back to the Android application via the cloud system. Experimental investigations show the advantage of the proposed system for the quantification of peroxide. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Smartphones

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Enhancing Local Area Power Stability: Integrative Oscillation Damping with PV Systems and BESS

Enhancing Local Area Power Stability: Integrative Oscillatio...

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Technology and Policy in Energy and Electric Power (ICT-PEP), International Conference on

作者： Ilham Akbar Ariesa Budi Zakaria Eduard Muljadi Graduate Program PLN-ITB PLN Corporate University Auburn USA Electrical and Computer Engineering Auburn University Auburn USA

ISBN: (数字)9798331518646

ISBN: (纸本)9798331518653

This research delves into enhancing local area power stability by integrating battery energy storage systems (BESS) with photovoltaic (PV) systems to address and accelerate the damping of post-fault oscillations following short-circuit disturbances within power grids incorporating variable renewable energy sources. Focused on implementing a power oscillation damping (POD) mechanism within PV plants, this study aims to mitigate post-fault oscillations effectively within a specified timeframe. The proposed POD within the PV plant is strategically designed to augment the grid's resilience by supplying additional active and reactive power in response to system demands post-disturbance. The integration of a 25 MW BESS has demonstrated a significant enhancement in the system's recovery speed, reducing oscillation duration from 60 seconds to 45 seconds. Moreover, a configuration with double PV systems and a 50 MW BESS further reduced the oscillation duration to 42 seconds. Utilizing PSCAD software, this study presents an innovative approach to visualize the system's behavior post-short-circuit disturbances, confirming the efficacy of BESS integration in improving system stability and reliability. These results pave the way for further exploration of optimal BESS sizing and placement strategies to maximize grid resilience.

关键词： Damping Reactive power Battery energy storage system Simulation Power system stability Stability analysis Circuit stability Oscillators Frequency control Resilience

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Performance Evaluation of Coffee Bean Binary Classification Through Deep Learning Techniques 1

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International Conference on Innovative Technologies in Intelligent Systems and Industrial Applications, CITISIA 2022

作者： Islamy, Fajrul Muchtar, Kahlil Arnia, Fitri Dawood, Rahmad Febriana, Alifya Elwirehardja, Gregorius Natanael Pardamean, Bens Department of Electrical and Computer Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Bioinformatics and Data Science Research Center Bina Nusantara University Jakarta11480 Indonesia Computer Science Department Master of Computer Science Program BINUS Graduate Program Bina Nusantara University Jakarta11480 Indonesia

ISBN: (数字)9783031290787

ISBN: (纸本)9783031290770

Coffee beans are one of the high-value commodities in Indonesia, but the sorting method for the quality of coffee beans still uses visual methods and sieves with mechanical machines. This study aims to provide an alternative to classifying coffee beans using Deep Learning algorithms, such as the ResNet-18 and MobileNetV2. The dataset used is USK-COFFEE which consists of two classes, the normal coffee bean class, and the defect coffee bean class. The models were trained using the balanced and imbalanced datasets, meaning that two scenarios were performed. From the results of this study, the accuracy value for the ResNet-18 model was 91.50% when trained on the balanced dataset and 90.87% on the imbalanced dataset. It outperformed the MobileNetV2 architecture, which only achieved 0.8125 and 0.8112 accuracy scores when trained on the balanced and imbalanced datasets, respectively. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.

关键词： Computer vision

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Factors in the comfort of a vertical mouse and the recommended for Indonesian user 2

Factors in the comfort of a vertical mouse and the recommend...

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2nd International Conference on Biospheric Harmony Advanced Research, ICOBAR 2020

作者： Iswara, L. Prastitasari, D. Nabil, A. Perwira, S.B. Sahroni, T.R. Industrial Engineering Department BINUS Graduate Program Faculty of Engineering Bina Nusantara University Jakarta11480 Indonesia

In a traditional mouse, the design is usually made to position the arms and palms facing down so that the forearm muscles will be tenser, and posture or position is not ideal on the wrist which will be more at risk of disruption of the wrist nerve (median). The wrists carry out repetitive movements for long periods to type and hold the mouse which generally uses a combination of strength and repetition of movements of the fingers and hands over a long period. As a result of excessive use of these hands can be a trigger for the risk of Carpal Tunnel Syndrome (CTS). This syndrome occurs when the nerves in the wrist are squeezed or compressed, causing a condition that makes the fingers experience a tingling sensation, numbness, pain, or weakness. To avoid this problem, a vertical mouse is recommended to use. Vertical mouse factors include width, height, and button switch position. The aim of the research was to obtain information based on experiments of which factors most influenced user convenience and the proposed design vertical mouse with a size suitable for Indonesian. © Published under licence by IOP Publishing Ltd.

关键词： Mammals

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Elevated temperature-driven coordinative reconstruction of an unsaturated single-Ni-atom structure with low valency on a polymer-derived matrix for the electrolytic oxygen evolution reaction

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Nanoscale 2024年第15期16卷 7467-7479页

作者： Patil, Rahul Rajput, Anubha Matsagar, Babasaheb M. Chen, Norman C. R. Ujihara, Masaki Salunkhe, Rahul R. Yadav, Praveen Wu, Kevin C.-W. Chakraborty, Biswarup Dutta, Saikat Electrochemical Energy & Sensor Research Laboratory Amity Institute of Click Chemistry Research & Studies Amity University Noida India Department of Chemistry Indian Institute of Technology New Delhi India Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taiwan National Taiwan University Taiwan Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei Taiwan Materials Research Laboratory Department of Physics Indian Institute of Technology Jammu India Synchrotron X-ray Facility Raja Ramanna Centre for Advanced Technology Rajendra Nagar Madhya Pradesh 452013 Indore India

A high-temperature pyrolysis-controlled coordination reconstruction resulted in a single-Ni-atom structure with a Ni-Nx-C structural unit (x = N atom coordinated to Ni). Pyrolysis of Ni-phen@ZIF-8-RF at 700 °C resulted in NiNP-NC-700 with predominantly Ni nanoparticles. Upon elevating the pyrolysis temperature from 700 to 900 °C, a coordination reconstruction offers Ni-Nx atomic sites in NiSA-NC-900. A combined investigation with X-ray absorption spectroscopy, X-ray photoelectron spectroscopy, and soft X-ray L3-edge spectroscopy suggests the stabilization of low-valent Niδ+ (0 −2 was achieved. The cell potential recorded with Pt(−)/(+)NiSA-NC-900/NF was much lower than that obtained for other cells, i.e., Pt(−)/NF and NF(−)/(+)NF, which enhances the potentials of low-valent NiSAs for insightful understanding of the OER. At a constant applied potential of 1.61 V (vs. RHE) for 12 h, an small increase in current for initial 0.6 h followed by a constant current depicts the fair stability of catalyst for 12 h. Our results offer an insightful angle into the OER with a coordinatively reconstructed single-Ni-atom structure at lower valency ( © 2024 The Royal Society of Chemistry.

关键词： Reaction kinetics

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Vehicle Wheel Hub Recognition Method Based on HOG Feature Extraction and SVM Classifier 14

Vehicle Wheel Hub Recognition Method Based on HOG Feature Ex...

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14th International Conference on Information Technology and Electrical engineering, ICITEE 2022

作者： Wang, Bin Juanatas, Ronaldo Niguidula, Jasmin Anhui Technical College of Mechanical and Electrical Engineering Internet and Communications Department Wuhu China Technological University of the Philippines Graduate Program and External Studies Manila Philippines

ISBN: (数字)9781665460774

ISBN: (纸本)9781665460774

In order to avoid the problems of low accuracy of wheel hub recognition and classification and excessive dependence on template image quality in the process of automatic production of the automobile wheel hub, a vehicle wheel hub recognition method based on Histogram of Oriented Gradient (HOG) and Support Vector Machine (SVM) is proposed. Firstly, the wheel hub images under three different lighting conditions are collected, and the wheel hub images are processed in grayscale;Secondly, the positive and negative samples are made, and hog features are extracted, respectively;Finally, the extracted hog features are trained by SVM classifier, and the trained target classifier is used to recognize the wheel hub photos under three different lighting conditions. The experimental results show that this method has higher recognition accuracy than the traditional template matching method under different lighting conditions. © 2022 IEEE.

关键词： Support vector machines

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Comparison of Simulation, SDR Implementation and Commercial Device on LoRa Protocol

Comparison of Simulation, SDR Implementation and Commercial ...

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International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT)

作者： Vitor Carvalho Max Feldman Ivan Müller Marcelo Götz Graduate Program in Electrical Engineering Universidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brasil

ISBN: (数字)9798350350869

ISBN: (纸本)9798350350876

The LoRa protocol stands out for its applicability in remote sensing and the IoT. However, this protocol is proprietary and implemented directly on chips developed by its owner, which can hinder performance analysis. In this scenario, the use of Software Defined Radios (SDR) becomes apparent. Therefore, this study verifies the robustness of the LoRa protocol in a Gaussian noise environment using an implementation of the protocol in SDR previously developed for GNU Radio. To achieve this, this paper provides an extensive comparison of simulated, SDR-based, and commercial devices to perform a robustness evaluation. The results confirm the effectiveness of LoRa modulation in negative signal-to-noise ratios and the compatibility of the SDR LoRa implementation with commercial devices, although they reveal discrepancies with the proprietary implementation.

关键词： AWGN channels Flowcharts Protocols Transducers LoRa Modulation Data collection Robustness Signal to noise ratio Software radio

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Anomalous enhancement of Néel order in the S=12 square lattice Heisenberg model under fictitious magnetic field

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Physical Review B 2025年第6期111卷 064415-064415页

作者： Takayuki Yokoyama Yasuhiro Tada Quantum Matter Program Graduate School of Advanced Science and Engineering Hiroshima University Higashihiroshima Hiroshima 739-8530 Japan Institute for Solid State Physics University of Tokyo Kashiwa 277-8581 Japan

Fictitious magnetic fields can be introduced in quantum magnets by strain engineering and the Aharonov-Casher effect. Here, we study impacts of a uniform fictitious magnetic field and corresponding Landau quantization on the Néel order in the S=12 Heisenberg model on the square lattice as a prototypical system of quantum magnets. We first analyze the system by using the spin-wave approximation. It is found that the staggered magnetization is enhanced by the fictitious magnetic field and it shows a simple scaling behavior with respect to the magnetic length, in contrast with a naive expectation based on the Dzyaloshinskii-Moriya interaction. We also perform density-matrix-renormalization-group calculations to fully consider quantum effects and obtain quantitatively more accurate results. The enhancement is found to be anomalously strong, and it shows a nontrivial scaling behavior or a fluctuation induced discontinuity. These results are beyond the well-known understanding of correlated systems under magnetic fields called the magnetic catalysis.

关键词： Spin waves

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Four-phase Buck Converter Design and Thermal Modeling Using FEA Simulation 14

Four-phase Buck Converter Design and Thermal Modeling Using ...

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14th Seminar on Power Electronics and Control, SEPOC 2022

作者： Eckhardt, Gustavo Lenz, Joao Manoel An Electrical Engineering Undergrad with A Scientific Initiation Scholarship at Unijuí Brazil Unijúi Brazil Mathematical and Computational Modeling Graduate Program Unijúi Brazil Brazil

ISBN: (数字)9781665470896

ISBN: (纸本)9781665470896

Equipment with high efficiency, high power density, reduced size and low cost are in demand in the automotive industry. This work presents a method to design and model a high power-density four-phase DC-DC Buck converter for an automotive application and using the components operating temperature as a design criteria. A parameter sweep is done to select the operating point of the DC-DC converter combined with an iterative method to select part numbers, where preference is given to components that are AEC-Qxxx qualified. The converter is modeled and power losses are computed in SPICE considering the parasitic elements present in the PCB and the dynamic characteristics and non-idealities of the electronic components;thermal modeling is performed using Ansys Icepak. The results indicate that the design meets all electrical and thermal requirements for an automotive application. An efficiency of 95.97% is obtained in a four-phase DC-DC Buck converter that supplies a total of 800 W to 4 loads, in a space of 43.77 cm3, that is, an estimated power density of 18.28 W/cm3. © 2022 IEEE.

关键词： Buck converter

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Small-Signal Analysis of a Self-Adaptive Droop-Based Converter Control Method 15

Small-Signal Analysis of a Self-Adaptive Droop-Based Convert...

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15th IEEE International Conference on Industry Applications, INDUSCON 2023

作者： Teixeira, Lucas S. Oliveira, Gustavo C.M. Ferreira, Reginaldo V. Freitas, Leandro Silva, Sidelmo M. MG Belo Horizonte Brazil MG Betim Brazil Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais Av. Antônio Carlos 6627 MG Belo Horizonte31270-901 Brazil

ISBN: (纸本)9798350314182

Microgrids are an increasingly widespread approach to grid configuration that allow for more flexible integration of renewable energy into the power grid. For a microgrid to be able to operate in islanded mode, it must contain a minimum amount of grid-forming generators. While traditional synchronous machines are naturally grid-forming, most Distributed Energy Resources (DERs) are inverter-based and, commonly, grid-following. This situation presents a challenge for distribution systems, which are expected to become increasingly reliant on distributed and renewable sources. Self-adaptive droop is a control technique for inverter-based systems (especially electric Energy Storage systems) which allows an energy source to smoothly transition between grid-connected and islanded operation modes. Much like traditional droop, this control algorithm has non-linear elements. This paper presents a small-signal model for a self-adaptive droop controlled inverter. Based on this small-signal model, a stability study is conducted in order to better select the droop control gains (Kip and Kiq) in accordance to the desired dynamic response. © 2023 IEEE.

关键词： distributed generation droop control dynamic response Microgrids self-adaptive droop small-signal model

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