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International Conference on Software engineering Research, Management and Applications (SERA)

作者： Yangyang Qian Koki Hayakawa Seiji Nishifuji Shenglin Mu Shota Nakashima Department of Electrical and Electronic Engineering Yamaguchi University Ube Yamaguchi Japan Graduate School of Science and Engineering Ehime University Matsuyama Ehime Japan

ISBN: (数字)9798350391343

ISBN: (纸本)9798350391350

People with severe upper limb disabilities need assistance from caregivers when eating, which becomes a burden for caregivers. Our laboratory has developed meal assistance robots that use image recognition and voice recognition to solve this problem. In a previous study, we proposed a region segmentation method using color and texture differences derived from input images as an image recognition method. However, this method was less effective because lighting and shadows affected the selection of appropriate features in the calculation of differences. In this study, we introduce a method for calculating the degree of difference between color segmented regions based on the HSV color space and texture obtained from color information. Furthermore, we propose a method that uses the HSV color space based on saturation and texture weight optimization to calculate differences to perform environment-independent region segmentation. A validation experiment was conducted to properly divide the food area of boxed lunch to confirm the effectiveness of the proposed method. The results showed that the accuracy exceeded 90% for all boxed lunch. Therefore, the proposed method can accurately identify food areas, regardless of the environment.

关键词： Image segmentation Accuracy Image color analysis Shape Lighting Speech recognition Robots

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PV and Battery Sizing and Cost Study for Small Remote Islands Considering Load Demand Peak Shift

PV and Battery Sizing and Cost Study for Small Remote Island...

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Power, Energy and electrical engineering (CPEEE), International Conference on

作者： Clarence Kitalong Yasuhiro Noro Electrical Engineering and Electronics Program Kogakuin University Tokyo Japan Department of Electrical and Electronic Engineering Kogakuin University Tokyo Japan

This paper discusses energy and cost comparison for 9 different combinations of Photovoltaic (PV) and Lithium-Ion Battery Energy Storage System (BESS) sizes with load demand peak changes for the Kayangel Power System (KPS). 9 PV and BESS combinations were modeled with the existing 90kW Diesel Generator (DG) and simulated while analyzing the kWh energy values of DG operation, PV curtailment and battery power flow energy values. A comparative cost analysis was then conducted on these 3 energies using Installation Costs (IC), diesel fuel costs and energy charge costs. Following this, the study was expanded to a 20-year time period for more complete system lifetime cost estimations. Simulated energy losses and system costs showed mostly favorable values during increased PV and BESS sizes and shifted load demand peak. Simulation results also identified combinations where increased sizing and shifted load demand peak made little difference.

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300-Gbit/s/λ 8-Level Pulse-Amplitude-Modulation (PAM8) with a silicon microring modulator utilizing long short term memory regression and deep neural network classification

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Optics and Laser Technology 2024年 171卷

作者： Hung, Tun-Yao Chan, David W.U. Peng, Ching-Wei Chow, Chi-Wai Tsang, Hon Ki Department of Photonics & Graduate Institute of Electro-Optical Engineering College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu30010 Taiwan Department of Photonics & Graduate Institute of Electro-Optical Engineering College of Electrical and Computer Engineering National Chiao Tung University Hsinchu30010 Taiwan Department of Electronic Engineering The Chinese University of Hong Kong Shatin Hong Kong

We present the first experimental demonstration up the authors' knowledge a high-capacity short-reach optical communication link which employs a long-short-term-memory (LSTM) and deep-neural-network (DNN) for enabling 300-Gbit/s (100 Gbaud) 8-level pulse amplitude modulation (PAM8) generated by a single 55-GHz bandwidth silicon microring modulator (SiMRM) with a driving voltage of 1.8-Vpp. As PAM8 modulation has a lower average level-to-level transition energy when compared with that in PAM4, it could be possible to achieve higher energy efficiency when utilizing PAM8 at the same driving voltage. To recover the PAM8 modulation, LSTM and DNN are utilized for regression and classification respectively. The LSTM contains memory cells for dealing with signal time domain dependencies, and has the ability to store, read, and reject data passing through the neural network. The subsequent DNN performs the classification of the 8 levels. Experimental results show that 300 Gbit/s PAM8 modulation is achieved at back-to-back (B2B) and 270 Gbit/s PAM8 is achieved after 1 km standard single-mode-fiber (SSMF) transmission satisfying the soft-decision forward error correction (SD-FEC) bit-error-rate requirement (BER) of 2.4 × 10-2. © 2023 Elsevier Ltd

关键词： Deep neural networks

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AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes With Varied Thickness of Sidewall Passivation via Atomic Layer Deposition

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IEEE Transactions on Electron Devices 2023年第11期70卷 5727-5731页

作者： Peng, Kangwei Lai, Shouqiang Shen, Mengchun Li, Saijun Zheng, Lijie Dai, Yurong Chen, Jilan Zhu, Lihong Chen, Guolong Wang, Shuli Kuo, Hao-Chun Lu, Yijun Chen, Zhong Wu, Tingzhu Xiamen University Fujian Engineering Research Center for Solid-State Lighting Department of Electronic Science Xiamen361005 China Sanan Optoelectronics Company Ltd. Xiamen361005 China National Yang Ming Chiao Tung University College of Electrical and Computer Engineering Department of Photonics and Graduate Institute of Electro-Optical Engineering Hsinchu30010 Taiwan Hon Hai Research Institute Semiconductor Research Center Taipei11492 Taiwan Xiamen361005 China

In this study, we fabricated deep-ultraviolet light-emitting diodes (DUV-LEDs) with Al2O3 films of 0-, 130-, and 255-nm via atomic layer deposition (ALD). In addition, the effects of the passivation layers on the DUV-LEDs were systematically investigated. The current-voltage characteristics of these samples revealed the passivating effect of the Al2O3 ALD films on the DUV-LEDs. By analyzing the external quantum efficiency (EQE) at room temperature using the ABC + f,(n) model, the differences in the physical mechanisms of the Al2O3 ALD film on DUV-LEDs were determined. The measurements of the electroluminescence (EL) and far-field radiation patterns (EQE, light output power (LOP), and radiation patterns) showed that ALD can enhance the performance of DUV-LEDs, particularly DUV-LEDs with a 130-nm Al2O3 ALD passivation layer. Moreover, the aging test and failure ratio of these DUV-LEDs under humidity exposure (85 °C/85% RH) indicated the specific effect of these Al2O3 ALD films on the reliability of DUV-LEDs. © 1963-2012 IEEE.

关键词： Light emitting diodes

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Fast Learning in Spike-Timing-Dependent-Plasticity Using Ga-Sn-O Thin Film 31

Fast Learning in Spike-Timing-Dependent-Plasticity Using Ga-...

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31st International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2024

作者： Kita, Hidehito Horiuchi, Atsushi Matsuda, Tokiyoshi Kawanishi, Hidenori Kimura, Mutsumi Graduate School of Advanced Science and Technology Ryukoku University Seta Shiga Otsu520-2194 Japan Kindai University Department of Electrical and Electronic Communication Engineering Osaka577-8502 Japan Graduate School of Science and Technology Nara Institute of Science and Technology Ikoma Takayama630-0192 Japan

ISBN: (纸本)9784991216961

In this study, spike-timing-dependent-plasticity (STDP) was reproduced in devices fabricated using GTO (Ga-Sn-O). GTO was fabricated by sputtering, and the performance of the device was confirmed by I-V characteristics. The previous experiments were performed with a 1Hz voltage waveform, but this time, a 1kHz voltage waveform was used to investigate the possibility of high-speed learning. The experimental results showed a symmetric STDP, indicating the possibility of high-speed learning. © 2024 FTFMD.

关键词： Tin alloys

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Condition Assessment of Underground Cable System Using Fuzzy Logic and Scoring and Weighting Average Methods

Condition Assessment of Underground Cable System Using Fuzzy...

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2023 International Conference on Power, Energy and Innovations, ICPEI 2023

作者： Romphoyen, Dineenath Panmala, Nattapon Suwanasri, Thanapong Suwanasri, Cattareeya King Mongkut's University of Technology North Bangkok The Sirindhorn International Thai-German Graduate School of Engineering EPE Program Bangsue Bangkok Thailand King Mongkut's University of Technology North Bangkok Faculty of Technical Education Department of Teacher Training in Electrical Engineering Bangsue Bangkok Thailand King Mongkut's University of Technology North Bangkok Faculty of Engineering Department of Electrical and Computer Engineering Bangsue Bangkok Thailand

ISBN: (纸本)9798350344585

In this paper, the overall health index of underground cable system is determined using Fuzzy Logic and Scoring and Weighting Average methods. The relevant data of 73 feeders has been collected in the prepared evaluation forms, divided into five major component groups: cable, joint, termination, manhole, and ductbank. In each component, various testing methods and diagnostic techniques are applied, and then the numerical score is determined according to the technical criteria for condition assessment. Subsequently, the obtained overall health index is multiplied with the conditional factor to incorporate the differences in installation type and configuration as well as the operating and environmental conditions. Finally, the overall health index based on these two methods is compared to verify the accuracy of the obtained results to properly plan the preventive and condition-based maintenance and to improve the reliability of the underground cable system. © 2023 IEEE.

关键词： Fuzzy logic

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Adaptive K-Repetition Transmission Employing Site Diversity Reception for 5G NR Uplink Grant-Free URLLC

Adaptive K-Repetition Transmission Employing Site Diversity ...

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IEEE Conference on Vehicular Technology (VTC)

作者： Arif Dataesatu Kosuke Sanada Hiroyuki Hatano Kazuo Mori Pisit Boonsrimuang Department of Electrical and Electronic Engineering Graduate School of Engineering Mie University Mie Japan Department of Telecommunication Engineering School of Engineering KMITL Bangkok Thailand

The Internet of Things (IoT) is currently being employed for wireless real-time interactive systems with ultra-reliable and low-latency communications (URLLC) that provide high service quality for the fifth generation (5G) new radio (NR) standard. Grant-free (GF) transmission with K-Repetition (K-Rep) is a transmission technique that aims to meet the URLLC requirements. However, the K-Rep increases the number of packet transmissions, which may cause severe interference and substantial energy consumption. This paper employs site diversity reception to the GF K-Rep scheme and proposes its adaptive control mechanism to decrease the number of repeated transmissions in order to improve communication reliability and energy consumption for IoT URLLC users. According to our simulation results, the proposed site diversity reception for the K-Rep scheme can significantly improve the reliability compared with the conventional K-Rep under single-cell reception. Additionally, the proposed adaptive K-Rep control scheme can reduce the transmission energy consumption greatly, hence saving battery resource of IoT URLLC users.

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Plasmonic BICs as Biosensors with Better Detectivity

Plasmonic BICs as Biosensors with Better Detectivity

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Li, Zhichao Prasad, Ciril S. Wang, Xielin Naik, Gururaj V. Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States

Plasmonic sensors exhibit high sensitivity due to enhanced local fields. But, their detectivity is poor because of their poor Q-factors. Using a plasmonic BIC, we experimentally demonstrate enhanced Q-factors in a pla... 详细信息

ISBN: (纸本)9781957171258

关键词： Q factor measurement

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Enhancing the Performance of E-Mode AlGaN/GaN HEMTs With Recessed Gates Through Low-Damage Neutral Beam Etching and Post-Metallization Annealing

IEEE Open Journal of Nanotechnology

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IEEE Open Journal of Nanotechnology 2023年 4卷 150-155页

作者： Chen, Yi-Ho Ohori, Daisuke Aslam, Muhammad Lee, Yao-Jen Li, Yiming Samukawa, Seiji National Yang Ming Chiao Tung University Parallel and Scientific Computing Laboratory Graduate Degree Program of College of Electrical and Computer Engineering Hsinchu300093 Taiwan Tohoku University Institute of Fluid Science Sendai980-8577 Japan National Yang Ming Chiao Tung University Parallel and Scientific Computing Laboratory Electrical Engineering and Computer Science International Graduate Program Hsinchu300093 Taiwan National Yang Ming Chiao Tung University Institute of Pioneer Semiconductor Innovation Hsinchu300093 Taiwan National Yang Ming Chiao Tung University Parallel and Scientific Computing Laboratory Institute of Communications Engineering Institute of Biomedical Engineering Hsinchu300093 Taiwan National Yang Ming Chiao Tung University Department of Electronics and Electrical Engineering Hsinchu300093 Taiwan National Yang Ming Chiao Tung University Institute of Communications Engineering Hsinchu300093 Taiwan

This study investigated the electrical properties of AlGaN/GaN high-electron-mobility transistors (HEMTs) with varied recess depths under the gate electrode. We demonstrated a recess depth of approximately 6 nm, which was achieved through neutral beam etching (NBE) technique with a low etch rate of 1.8 nm/min, resulting in device enhancement-mode (E-mode) behavior with threshold voltage (Vth) of 0.49 V. The effects of post-metallization annealing (PMA) on the device performance were also examined. The results revealed that PMA treatment improves the DC characteristics of the devices, including maximum drain current (IDMAX), transconductance (gm), subthreshold swing (SS), on-off ratio, and off-state leakage current, with maximum enhancement percentage of 18.3% for IDMAX, 3758% for on-off ratio, and 54.3% for SS. Moreover, this study compared the recess depths of metal-insulator-semiconductor high-electron-mobility transistors (MIS-HEMTs) with the SiN dielectric layer. The results showed that MIS-HEMTs exhibit more negative Vth values, which can be attributed to the controlled surface states achieved through passivation. © 2020 IEEE.

关键词： Etching

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Investigation of Lightning Overvoltage on 220 kV Transmission Lines in Bhutan Using ATP-EMTP

Investigation of Lightning Overvoltage on 220 kV Transmissio...

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2023 International Conference on Power, Energy and Innovations, ICPEI 2023

作者： Samten Suwanasri, Thanapong Suwanasri, Cattareeya Panmala, Nattapon King Mongkut's University of Technology North Bangkok The Sirindhorn International Thai-German Graduate School of Engineering EPE Program Bangsue Bangkok Thailand King Mongkut's University of Technology North Bangkok Faculty of Engineering Department of Electrical and Computer Engineering Bangsue Bangkok Thailand King Mongkut's University of Technology North Bangkok Faculty of Technical Education Department of Teacher Training in Electrical Engineering Bangsue Bangkok Thailand

ISBN: (纸本)9798350344585

This paper provides an examination of the impact of lightning strikes on a 220 kV double circuit (D/C) high voltage transmission line in Bhutan. The study employs the ATP-EMTP software to identify the leading causes of transmission line faults, which are primarily attributed to lightning strikes. Since the transmission lines run through areas in Bhutan that are prone to severe weather conditions and lightning strikes, they are vulnerable to damage, leading to an unreliable power supply. To address this issue, the author proposes several solutions, such as enhancing the tower footing resistance and installing line surge arresters. The author also created models of different transmission towers and analyzed an 18 km stretch of the transmission line that is highly susceptible to lightning strikes. © 2023 IEEE.

关键词： Electric lines

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