ETRI Journal最新文献_第4页

XEM: Tensor accelerator for AB21 supercomputing artificial intelligence processor XEM：用于 AB21 超级计算人工智能处理器的张量加速器

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-10-12 DOI: 10.4218/etrij.2024-0141

Won Jeon, Mi Young Lee, Joo Hyun Lee, Chun-Gi Lyuh

引用次数: 0

Quantum electrodynamical formulation of photochemical acid generation and its implications on optical lithography 光化学酸生成的量子电动力学公式及其对光学光刻技术的影响

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-10-12 DOI: 10.4218/etrij.2024-0127

Seungjin Lee

引用次数: 0

Performance improvement of microLED-to-microLED visible light communication using reverse bias 利用反向偏置改进微led到微led可见光通信的性能

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-10-12 DOI: 10.4218/etrij.2023-0484

Bo-Guen Kim, Sung-Man Kim

引用次数: 0

Mixed-mode SNN crossbar array with embedded dummy switch and mid-node pre-charge scheme 采用嵌入式假开关和中节点预充电方案的混合模式 SNN 横杆阵列

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-10-12 DOI: 10.4218/etrij.2024-0120

Kwang-Il Oh, Hyuk Kim, Taewook Kang, Sung-Eun Kim, Jae-Jin Lee, Byung-Do Yang

引用次数: 0

Trends in quantum reinforcement learning: State-of-the-arts and the road ahead 量子强化学习的趋势：艺术现状与未来之路

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-10-03 DOI: 10.4218/etrij.2024-0153

Soohyun Park, Joongheon Kim

引用次数: 0

A compact dual-band bandpass filter based on coupled stub-loaded square ring resonators by using transversal signal-interaction concepts 利用横向信号相互作用的概念，设计了一种基于耦合短桩负载方形环形谐振器的紧凑双带带通滤波器

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-09-30 DOI: 10.4218/etrij.2023-0338

Dong-sheng Xu, Li-tian Wang, Li-rong Qian, Cui-ping Li, Ya-hui Tian, Hong-lang Li, Xuan Chen, Yu-qi Li

{"title":"A compact dual-band bandpass filter based on coupled stub-loaded square ring resonators by using transversal signal-interaction concepts","authors":"Dong-sheng Xu, Li-tian Wang, Li-rong Qian, Cui-ping Li, Ya-hui Tian, Hong-lang Li, Xuan Chen, Yu-qi Li","doi":"10.4218/etrij.2023-0338","DOIUrl":"https://doi.org/10.4218/etrij.2023-0338","url":null,"abstract":"In this paper, a novel dual-band wideband bandpass filter (BPF) based on transversal signal-interaction concepts with a wide upper stopband is proposed and investigated. The designed specification of two passbands can be managed and satisfied based on the independent controllable fractional bandwidth of the two passbands and the centered frequencies. The centered frequencies of dual-band BPF are, respectively, 0.79 GHz (ƒ1) and 1.24 GHz (ƒ2) with 3 dB fraction bandwidths of 26.54% and 11.3%. Two transmission paths consisting of coupled stub-loaded square ring resonators and anti-coupled shorted lines are used to realize signal cancellation of multiple transmission path signal transmission from Port 1 to Port 2. Eleven transmission zeros (TZs) modify harmonic suppression up to 10 ƒ1 with stopband rejection higher than 15 dB. Butterworth lumped notch network and step impedance resonator (SIR) are also utilized to improve the selectivity and harmonic suppression. A compact filter with a circuit size of 0.08λg × 0.08λg is implemented and tested. Good agreement between simulation and measured results verifies the reliability of the designing scheme.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"46 6","pages":"1113-1124"},"PeriodicalIF":1.3,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0338","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement of eye socket recognition performance using inverse histogram fusion images and the Gabor transform 利用反直方图融合图像和Gabor变换增强眼窝识别性能

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-09-30 DOI: 10.4218/etrij.2023-0395

Harisu Abdullahi Shehu, Ibrahim Furkan Ince, Faruk Bulut

{"title":"Enhancement of eye socket recognition performance using inverse histogram fusion images and the Gabor transform","authors":"Harisu Abdullahi Shehu, Ibrahim Furkan Ince, Faruk Bulut","doi":"10.4218/etrij.2023-0395","DOIUrl":"https://doi.org/10.4218/etrij.2023-0395","url":null,"abstract":"The eye socket is a cavity in the skull that encloses the eyeball and its surrounding muscles. It has unique shapes in individuals. This study proposes a new recognition method that relies on the eye socket shape and region. This method involves the utilization of an inverse histogram fusion image to generate Gabor features from the identified eye socket regions. These Gabor features are subsequently transformed into Gabor images and employed for recognition by utilizing both traditional methods and deep-learning models. Four distinct benchmark datasets (Flickr30, BioID, Masked AT & T, and CK+) were used to evaluate the method's performance. These datasets encompass a range of perspectives, including variations in eye shape, covering, and angles. Experimental results and comparative studies indicate that the proposed method achieved a significantly (\u0000<math>\u0000 <mi>p</mi>\u0000 <mo><</mo>\u0000 <mn>0.001</mn></math>) higher accuracy (average value greater than 92.18%) than that of the relevant identity recognition method and state-of-the-art deep networks (average value less than 78%). We conclude that this improved generalization has significant implications for advancing the methodologies employed for identity recognition.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"47 1","pages":"123-133"},"PeriodicalIF":1.3,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0395","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143497166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Precharge switch based on metal–oxide–semiconductor-controlled thyristor for power relay assembly of battery electric vehicles 基于金属氧化物-半导体控制晶闸管的纯电动汽车功率继电器组件预充开关

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-09-30 DOI: 10.4218/etrij.2023-0482

Dong Yun Jung, Kun Sik Park, Sang In Kim, Hyun Gyu Jang, Jongil Won, Yong Ha Lee, Jong-Won Lim

{"title":"Precharge switch based on metal–oxide–semiconductor-controlled thyristor for power relay assembly of battery electric vehicles","authors":"Dong Yun Jung, Kun Sik Park, Sang In Kim, Hyun Gyu Jang, Jongil Won, Yong Ha Lee, Jong-Won Lim","doi":"10.4218/etrij.2023-0482","DOIUrl":"https://doi.org/10.4218/etrij.2023-0482","url":null,"abstract":"The power relay assembly (PRA) is an essential component to ensure the safety of an electric vehicle. We propose a semiconductor-based precharge switch to overcome the shortcomings of the conventional mechanical relay, which is currently used as the precharge switch in the PRA. The gate-driving circuit uses a photocoupler instead of a gate-driving integrated circuit to reduce complexity and cost. Five devices, namely, two insulated-gate bipolar transistors (IGBTs), two silicon carbide metal–oxide–semiconductor field-effect transistors (SiC MOSFETs), and one metal–oxide–semiconductor-controlled thyristor (MCT) are tested as candidate precharge switches. Each device is analyzed under varying battery voltage and fixed measurement conditions. The IGBT and SiC MOSFET burn below 600 V, while the MCT exhibits normal operation up to 800 V. The MCT precharge switch can solve shortcomings of the conventional mechanical relay and increase the performance with a simple gate-driving circuit. Furthermore, the PRA with an MCT precharge switch can reduce the volume, weight, and cost while improving reliability.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"47 2","pages":"326-337"},"PeriodicalIF":1.3,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0482","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143836384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An enhanced companding algorithm for universal filtered multicarrier system 通用滤波多载波系统的增强型压缩算法

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-09-18 DOI: 10.4218/etrij.2023-0516

Vijaya Durga Chintala, Shri Ramtej Kondamuri, Subba Rao Suddapalli, Anuradha Sundru

{"title":"An enhanced companding algorithm for universal filtered multicarrier system","authors":"Vijaya Durga Chintala, Shri Ramtej Kondamuri, Subba Rao Suddapalli, Anuradha Sundru","doi":"10.4218/etrij.2023-0516","DOIUrl":"https://doi.org/10.4218/etrij.2023-0516","url":null,"abstract":"This paper proposes a new companding scheme called three \u0000<math>\u0000 <mi>μ</mi></math>-law companding to reduce the peak-to-average power ratio (PAPR) in a universal filtered multicarrier system. The proposed scheme is more flexible and provides better PAPR reduction and bit error rate (BER) through the selection of the three companding parameters. However, the proposed scheme suffers from high side lobes and increases the power of the companded signal. Hence, an enhanced three \u0000<math>\u0000 <mi>μ</mi></math>-law, which overcomes these limitations, is proposed. Unlike the first scheme, the enhanced scheme does not change the mean power of the companding signal because it incorporates power-level normalization. Simulation results show that, compared with other companding transforms, the proposed enhanced three \u0000<math>\u0000 <mi>μ</mi></math>-law scheme offers better BER characteristics and side-lobe level suppression. It also provides better PAPR reduction of 7.4 dB and net gain of 6.3 dB. The proposed enhanced three \u0000<math>\u0000 <mi>μ</mi></math>-law was evaluated over a multipath fading channel and was more robust than other companding techniques. Finally, the proposed enhanced algorithm was verified in real time using the Wireless Open-Access Research Platform.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"47 2","pages":"244-255"},"PeriodicalIF":1.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0516","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143836356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mitigating jamming attacks in underwater sensor networks using M-Qubed-based opportunistic routing protocol 基于m - qubed的机会路由协议缓解水下传感器网络中的干扰攻击

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-09-10 DOI: 10.4218/etrij.2023-0526

Joonsu Ryu, Sungwook Kim

{"title":"Mitigating jamming attacks in underwater sensor networks using M-Qubed-based opportunistic routing protocol","authors":"Joonsu Ryu, Sungwook Kim","doi":"10.4218/etrij.2023-0526","DOIUrl":"https://doi.org/10.4218/etrij.2023-0526","url":null,"abstract":"Routing in underwater sensor networks (UWSNs) is highly challenging because of harsh underwater conditions, such as deep water, high pressure, and rapid ocean currents. Furthermore, UWSNs are vulnerable to jamming attacks because of their limited bandwidth and battery capacity. Advancements in machine learning enable numerous routing methods to address these problems. Accordingly, we propose a novel max or minimax Q-learning (M-Qubed)-based opportunistic routing method for UWSNs. The method uses an opportunistic routing protocol, in which nodes dynamically select the next relay node by considering the status of their neighbors. Moreover, M-Qubed can maximize the benefits for both players in a two-player repeated game through reinforcement learning. Hence, it can reduce the energy loss caused by jamming attacks during routing, thereby increasing the routing efficiency in UWSNs. Simulation results reveal that the proposed routing scheme is less affected by jamming attacks than existing state-of-the-art routing methods. In addition, it can balance energy consumption across the nodes in a UWSN.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"47 3","pages":"559-571"},"PeriodicalIF":1.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0526","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0