发布求助
文献互助 智能选刊 最新文献

Electronics and Communications in Japan最新文献

筛选
英文 中文
Analysis of terahertz double dielectric structure patch antenna using nitride semiconductors 氮化物半导体太赫兹双介质结构贴片天线的分析
IF 0.3 4区 工程技术
Electronics and Communications in Japan Pub Date : 2023-02-11 DOI: 10.1002/ecj.12390
Shin Miura, Kenta Kurahashi, Keishiro Goshima, Masanori Nagase
{"title":"Analysis of terahertz double dielectric structure patch antenna using nitride semiconductors","authors":"Shin Miura,&nbsp;Kenta Kurahashi,&nbsp;Keishiro Goshima,&nbsp;Masanori Nagase","doi":"10.1002/ecj.12390","DOIUrl":"https://doi.org/10.1002/ecj.12390","url":null,"abstract":"<p>Recently, gallium arsenide (GaAs)-based resonant tunneling diode (RTD) oscillators and indium phosphorus (InP)-based Schottky barrier diode (SBD) receivers have been studied in the terahertz (THz) band. The THz devices for practical use should operate at room temperature, be small in size, and have high output power. Therefore, this study was focused on gallium nitride (GaN), which possesses excellent material properties, such as wide bandgap characteristics and heteroepitaxy on Si substrates. The GaN-based oscillators and receivers are expected to be compact, operate at room-temperature, and act as a high-power device for the THz-band devices. However, GaN has crystal defects, which can cause instability in device operations. A double dielectric structure patch antenna composed of Silicon Nitride (SiN) and Benzo Cyclo Butene (BCB) with different dielectric constants was proposed to realize a GaN-based THz transmitter and receiver. The antenna characteristics were investigated using the Finite Difference Time Domain (FDTD) method. The results showed that the SiN has little effect on the radiation, whereas the BCB is strongly responsible for the radiation. Comparing the absolute gain between the double dielectric structure and the conventional structure using the SiN, it was confirmed that the double dielectric structure can improve the absolute gain.</p>","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50128529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Three-phase wireless power supply system using a matrix converter 采用矩阵变换器的三相无线供电系统
IF 0.3 4区 工程技术
Electronics and Communications in Japan Pub Date : 2023-02-11 DOI: 10.1002/ecj.12389
Koki Yamanokuchi, Keisuke Kusaka, Jun-Ichi Itoh
{"title":"Three-phase wireless power supply system using a matrix converter","authors":"Koki Yamanokuchi,&nbsp;Keisuke Kusaka,&nbsp;Jun-Ichi Itoh","doi":"10.1002/ecj.12389","DOIUrl":"https://doi.org/10.1002/ecj.12389","url":null,"abstract":"<p>This paper proposes a three-phase wireless power transfer (WPT) system with a three-phase-to-three-phase matrix converter. The proposed system directly converts power from an AC grid to high-frequency AC for WPT. The three-phase WPT system with the matrix converter is effectively expands the lifetime of the WPT system. A novel hybrid commutation method, which is suitable for the WPT system with a resonant characteristic, is proposed to avoid the commutation failure of the matrix converter. The strategy of the proposed hybrid commutation is based on an estimation of the current direction considering the resonant characteristics and elimination of commutation in the critical area. The proposed commutation method achieves an AC input-current total harmonic distortion (THD) of 4.7% with the resonant three-phase load without a current sensor on the high-frequency side. Furthermore, the proposed WPT system achieves a system efficiency of 88.2% at a load of 4 kW.</p>","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50128530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of platinum buffer layer on the fabrication process of flexible ferroelectric epitaxial thin films 铂缓冲层对柔性铁电外延薄膜制备工艺的影响
IF 0.3 4区 工程技术
Electronics and Communications in Japan Pub Date : 2023-02-09 DOI: 10.1002/ecj.12386
Tomofumi Mizuyama, Hiroaki Nishikawa
{"title":"Effect of platinum buffer layer on the fabrication process of flexible ferroelectric epitaxial thin films","authors":"Tomofumi Mizuyama,&nbsp;Hiroaki Nishikawa","doi":"10.1002/ecj.12386","DOIUrl":"https://doi.org/10.1002/ecj.12386","url":null,"abstract":"<p>Epitaxial thin films of a ferroelectric perovskite-type oxide grown on single-crystalline SrTiO<sub>3</sub> (100) were transferred onto a flexible printed circuit (FPC). In the case that the thin films were directly adhered onto FPC using a copper foil double-coated conductive adhesive tape (Cu double-sided tape), serious cracking and exfoliation occurred during the transfer process. To avoid these damages, we have tried to insert a metal buffer layer with excellent ductility between the ferroelectric oxide thin film and the Cu double-sided tape. The platinum buffer layer was found to be appropriate to establish a crack- and exfoliation-free transfer process.</p>","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50126084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Discrimination of clothing materials from smartphone camera images 从智能手机摄像头图像中辨别服装材料
IF 0.3 4区 工程技术
Electronics and Communications in Japan Pub Date : 2023-02-09 DOI: 10.1002/ecj.12391
Ryohei Koike, Keiichi Yamada
{"title":"Discrimination of clothing materials from smartphone camera images","authors":"Ryohei Koike,&nbsp;Keiichi Yamada","doi":"10.1002/ecj.12391","DOIUrl":"https://doi.org/10.1002/ecj.12391","url":null,"abstract":"<p>Information on fabric material is necessary in washing and ironing clothing. However, indication on a care tag may peel off or the tag may come off due to deterioration over time. Discrimination of the material from the fabric itself is not easy for a general person. Estimating the material of an object is one of the challenging tasks in computer vision. This paper deals with the identification of cloth materials using computer vision. We studied a method to discriminate the fabric material from the image of clothing taken by a smartphone camera. First, we investigated the relationship between image resolution and discrimination accuracy using a convolutional neural network (CNN). As a result, we observed that the accuracy changes with resolution and that the resolution at which the accuracy is highest differs depending on the material. Based on these results, we proposed a fabric material discrimination method using multi-resolution images by combining two CNNs. As a result of the evaluation experiment, the proposed method discriminated six kinds of fabric materials with 87.1% accuracy, and the accuracy was significantly higher than that of the comparison method without using multi-resolution images.</p>","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50126085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microfluidic device for differentiation induction of iPS cells derived embryoid bodies with local chemical stimulation 局部化学刺激诱导iPS细胞胚胎体分化的微流控装置
IF 0.3 4区 工程技术
Electronics and Communications in Japan Pub Date : 2023-02-08 DOI: 10.1002/ecj.12393
Naoto Kusunoki, Shuhei Konagaya, Mitsunori Nishida, Shigehiro Sato, Hidekuni Takao, Fusao Shimokawa, Kyohei Terao
{"title":"Microfluidic device for differentiation induction of iPS cells derived embryoid bodies with local chemical stimulation","authors":"Naoto Kusunoki,&nbsp;Shuhei Konagaya,&nbsp;Mitsunori Nishida,&nbsp;Shigehiro Sato,&nbsp;Hidekuni Takao,&nbsp;Fusao Shimokawa,&nbsp;Kyohei Terao","doi":"10.1002/ecj.12393","DOIUrl":"https://doi.org/10.1002/ecj.12393","url":null,"abstract":"<p>This paper reports a microfluidic device that allows us to measure the effect of local differentiation stimulation on embryoid bodies for the purpose of elucidating the role of the cell-cell interaction of iPS cells in differentiation induction. We developed the local stimulation device having two chambers separated by thin polydimethyl siloxane (PDMS) membrane with through-holes of the diameter smaller than single cell. Embryoid bodies of iPS cells are formed on the membrane and seal the holes, separating the aqueous environments of two chambers without leakage. This configuration brings localized exposure to chemicals for differentiation induction at the area defined by the holes. In this paper, we demonstrated the function of local stimulation using fluorescent solution.</p>","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50124681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Parasteatoda tepidariorum phototaxis to LED illumination Parasteatoda tepidiriorum对LED照明的趋光性
IF 0.3 4区 工程技术
Electronics and Communications in Japan Pub Date : 2023-02-08 DOI: 10.1002/ecj.12388
Masaru Kamano, Kosuke Hironaka, Yuji Kawakami, Takanori Kozai, Takeshi Fujihara, Tao Zheng, Tomoya Konishi
{"title":"Parasteatoda tepidariorum phototaxis to LED illumination","authors":"Masaru Kamano,&nbsp;Kosuke Hironaka,&nbsp;Yuji Kawakami,&nbsp;Takanori Kozai,&nbsp;Takeshi Fujihara,&nbsp;Tao Zheng,&nbsp;Tomoya Konishi","doi":"10.1002/ecj.12388","DOIUrl":"https://doi.org/10.1002/ecj.12388","url":null,"abstract":"","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50124678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of quantum confinement in nanosheet FETs by using a quantum drift diffusion model 用量子漂移扩散模型分析纳米片FET中的量子约束
IF 0.3 4区 工程技术
Electronics and Communications in Japan Pub Date : 2023-02-08 DOI: 10.1002/ecj.12394
Masashi Matsuda, Akira Hiroki
{"title":"Analysis of quantum confinement in nanosheet FETs by using a quantum drift diffusion model","authors":"Masashi Matsuda,&nbsp;Akira Hiroki","doi":"10.1002/ecj.12394","DOIUrl":"https://doi.org/10.1002/ecj.12394","url":null,"abstract":"<p>In this paper, we have analyzed quantum confinement effects in nanosheet MOSFETs by using a quantum drift-diffusion (QDD) model. The QDD model is a device simulator which allows to simulate quantum confinement effects in the inversion layer for advanced MOSFETs. The quantum confinement effects in nanosheets have been analyzed by comparing the simulation results by QDD and drift-diffusion (DD) model. The drain current ratio of DD to QDD is 250.1% at VG = 0.5 V and 180.1% at VG = 0 V. While the maximum electron density of DD exists at the interface between the insulator and the silicon sheet, that of QDD goes to near the center of the silicon sheet. The electron areal density ratio of DD to QDD is 118.3% in the direction of the 10 nm width of the silicon sheet and 176.9% in the direction of the 4 nm width.</p>","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50124679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interaction between diamond and alkali metals and its application to machining of diamond 金刚石与碱金属的相互作用及其在金刚石加工中的应用
IF 0.3 4区 工程技术
Electronics and Communications in Japan Pub Date : 2023-02-07 DOI: 10.1002/ecj.12385
Toshihiro Shimada, Hiroki Takehana, Ichiro Yamane
{"title":"Interaction between diamond and alkali metals and its application to machining of diamond","authors":"Toshihiro Shimada,&nbsp;Hiroki Takehana,&nbsp;Ichiro Yamane","doi":"10.1002/ecj.12385","DOIUrl":"https://doi.org/10.1002/ecj.12385","url":null,"abstract":"<p>The interaction between diamond surfaces and alkali metals was studied experimentally and computationally. Li reacted with diamond above 600°C and significant etching of (100) surface was observed. An attempt was made to apply this etching reaction for electrical discharge machining of diamond tools.</p>","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 2","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50123735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of a database-driven soft-sensor and its application to a control system 数据库驱动软传感器的设计及其在控制系统中的应用
IF 0.3 4区 工程技术
Electronics and Communications in Japan Pub Date : 2022-10-19 DOI: 10.1002/ecj.12380
Takuya Kinoshita, Haruka Kano, Toru Yamamoto
{"title":"Design of a database-driven soft-sensor and its application to a control system","authors":"Takuya Kinoshita,&nbsp;Haruka Kano,&nbsp;Toru Yamamoto","doi":"10.1002/ecj.12380","DOIUrl":"https://doi.org/10.1002/ecj.12380","url":null,"abstract":"<p>In industries, it is difficult to measure physical quantities such as product quality. In order to estimate it, soft sensors have been proposed. In recent years, the Just-In-Time (JIT) method has attracted attention. According to this method, the output is estimated by extracting data from the database similar to the current situation. On the other hand, a database-driven control system has been proposed in which the JIT is equipped with a learning algorithm. This method calculates the control parameters using a database and has the scheme to learn the control parameters to minimize the control error. This paper proposes a new design method for soft sensors which uses a database-driven approach. Specifically, this paper proposes a method to improve the estimation accuracy without modifying the stored past data by introducing a new modifier <i>c</i> into the learning algorithm. Furthermore, a control system is designed in which the estimated value using the soft sensor is fed back.</p>","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"105 4","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137863934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Human dense avoidance based on a coverage control through robots 基于机器人覆盖控制的人类密集躲避
IF 0.3 4区 工程技术
Electronics and Communications in Japan Pub Date : 2022-10-17 DOI: 10.1002/ecj.12383
Shu Morita, Yuki Okura, Chiaki Kojima
{"title":"Human dense avoidance based on a coverage control through robots","authors":"Shu Morita,&nbsp;Yuki Okura,&nbsp;Chiaki Kojima","doi":"10.1002/ecj.12383","DOIUrl":"https://doi.org/10.1002/ecj.12383","url":null,"abstract":"<p>In this paper, we propose an efficient method for human dense avoidance based on a coverage control. Our motivation is to avoid crowding in public facilities such as stations and government offices, and human dense in the current situation of COVID-19 from system and control theory. In this paper, humans and robots are modeled as heterogeneous and homogeneous agents, respectively, which make decisions based on their local information. We suppose a dense situation caused by the rendezvous among humans due to their own inherent dynamics. As a main result, we propose a coverage control for a distributed movement of multiple humans. We also characterize the stationary point analytically in terms of the gains that describe a strength of the interconnection of the agents, and the centers of the Voronoi regions related to the agents. Moreover, we verify the meaning of the characterization from an engineering viewpoint of the dense avoidance. Finally, we show the efficiency of the method based on a numerical simulation.</p>","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"105 4","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137692555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信