Electronics and Communications in Japan最新文献_第5页

Gas pressure dependence of optical and mechanical properties in a SiCO thin film for optical waveguide by reactive sputtering method 反应溅射法光学波导用 SiCO 薄膜的光学和机械特性与气体压力的关系

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2023-12-06 DOI: 10.1002/ecj.12435

Hiroyuki Nikkuni, Hiroshi Ito, Yu Takatsuka

引用次数: 0

Analytical method of DC input impedance for stability analysis of IPM motor drive system 用于IPM电机驱动系统稳定性分析的直流输入阻抗分析方法

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2023-12-05 DOI: 10.1002/ecj.12437

Takaya Karino, Toshiji Kato, Kaoru Inoue

引用次数: 0

Study of humidity sensor using α-Fe2O3 as a humidity-sensitive material 以α-Fe2O3为湿度敏感材料的湿度传感器的研究

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2023-12-02 DOI: 10.1002/ecj.12439

Kosuke Naito, Kyohei Sasaki, Noriaki Ikenaga

引用次数: 0

Development and practice of learning materials for an engineering oriented circuit design workshop for elementary school student 面向工程的小学电路设计工作坊教材的开发与实践

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2023-12-02 DOI: 10.1002/ecj.12436

Tadashi Ishibashi, Jun Moriyama

{"title":"Development and practice of learning materials for an engineering oriented circuit design workshop for elementary school student","authors":"Tadashi Ishibashi, Jun Moriyama","doi":"10.1002/ecj.12436","DOIUrl":"10.1002/ecj.12436","url":null,"abstract":"This study aimed to develop teaching materials for circuit design and fabrication for elementary school students, and conduct workshops oriented to engineering. First, the content of the circuit design workshop was discussed and it was determined that a connection-focused design would be appropriate. Second, we examined the issue of existing teaching materials. Many of the existing kit materials were not suitable for learning circuit design as it was already completed. In addition, many of them required soldering work, which was too difficult for elementary school students. Hands-on materials that allow students to construct circuits through trial and error were suitable for learning circuit design. Therefore, we developed design and fabrication support materials using a 3D printer and conductive tape. Next, we provided workshop opportunities using developed material, with the theme of “making light-up cards,” wherein elementary school students worked on designing the layout of the components and fabrication. Consequently, students’ conceptual understanding of the connection was improved. All students were able to complete the circuit, with high self-evaluations of satisfaction and understanding suggesting that the activity was engineering-oriented.","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"107 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138543008","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

Autonomous configuration establishment method of wireless network on condition monitoring for coupling and decoupling of railway vehicles 铁道车辆耦合解耦状态监测无线网络自主组态建立方法

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2023-11-13 DOI: 10.1002/ecj.12433

Nagateru Iwasawa, Yuta Hosokawa, Akio Hada, Shogo Mamada, Shuji Harashima, Yasushi Fuwa

引用次数: 0

Terahertz radiation from shockwave front irradiated with femtosecond optical pulses 用飞秒光脉冲照射冲击波前的太赫兹辐射

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2023-11-08 DOI: 10.1002/ecj.12432

Takeshi Nagashima, Hsinhui Huang, Koji Hatanaka

引用次数: 0

A study on MMG sensor using piezoelectric polymer nanofibers by electrospinning 压电聚合物纳米纤维静电纺丝MMG传感器的研究

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2023-11-06 DOI: 10.1002/ecj.12434

Rintaro Abe, Koa Yasuda, Takefumi Kanda, Shuichi Wakimoto, Hisao Oka

{"title":"A study on MMG sensor using piezoelectric polymer nanofibers by electrospinning","authors":"Rintaro Abe, Koa Yasuda, Takefumi Kanda, Shuichi Wakimoto, Hisao Oka","doi":"10.1002/ecj.12434","DOIUrl":"10.1002/ecj.12434","url":null,"abstract":"In the fields of medical and sports science, it is required to evaluate muscle activity qualitatively and quantitatively. Currently, mechanomyogram (MMG) that can reflect the mechanical activity of muscle fibers is attracting attention. The purpose of this study is to develop a sensor that can measure MMG during exercise. In this study, a small and flexible MMG sensor using P(VDF/TrFE), which is a piezoelectric polymer material, spun into nanofibers by the electrospinning method has been fabricated and evaluated. By the fabricated electrospinning equipment and the obtained fabrication conditions of the nanofibers MMG sensor has been fabricated by using piezoelectric polymer fibers. By using nanofiber nonwoven fabric for the sensor element, the flexible sensor has been realized. In a sound wave reception experiment assuming MMG measurement, the P(VDF/TrFE) nonwoven fabric element showed that the element detected the sound pressure. Additionally, MMG during isometric contraction and pedaling motion has been measured using the fabricated sensor. The results show that the proposed sensor is effective for measuring MMG during exercise.","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 4","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637273","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

Modeling framework for batch-dependent dynamics of reaction process by combining first principles and machine learning 结合第一性原理和机器学习的批依赖反应动力学建模框架

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2023-10-23 DOI: 10.1002/ecj.12428

Taichi Ishitobi, Yohei Kono, Yoshinori Mochizuki

{"title":"Modeling framework for batch-dependent dynamics of reaction process by combining first principles and machine learning","authors":"Taichi Ishitobi, Yohei Kono, Yoshinori Mochizuki","doi":"10.1002/ecj.12428","DOIUrl":"10.1002/ecj.12428","url":null,"abstract":"We propose a modeling framework for automating batch processes operation. Batch processes are often controlled by PID controllers, where engineers manually regulate their parameters and temporal patterns of reference signals. Therefore, it takes a long time for optimizing these parameters and temporal patterns. A possible solution for this is to apply so-called Model Predictive Control (MPC) technology to the tuning. Here, batch process dynamics depend on the types of products and of equipment, thereby forcing engineers to construct and maintain multiple models that correspond to the number of combinations of product types and equipment types. Thus, batch process modeling is a time-consuming and complicated task. To solve this problem, we propose a modeling framework; about a modeling target, the part applying commonly and parameters can be decided in advance are constructed by mathematical models, and the part that required experimentation for designing or tuning are constructed by machine learning models. We expect this framework can improve estimation accuracy and suppressing the number of model construction by separating model construction and combining the mathematical and machine learning models. In our simulation, we confirmed that our proposed model can suppress prediction error (RMSE) of reactor temperature under 1 K. Furthermore, an optimization algorithm with our model can find a temporal pattern of a reference signal so as to reduce control error of reactor temperature under 1.99 K.","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 4","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135367024","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

Estimating the Ballast bed shape using Camcorder video 使用摄像机视频估计镇流器床的形状

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2023-10-18 DOI: 10.1002/ecj.12430

Riho Maeda, Nozomi Nagamine, Yosuke Tsubokawa, Wataru Goda

引用次数: 0

Development of a stand-alone portable respiratory rate monitor using a Doppler radar 使用多普勒雷达的独立式便携式呼吸速率监测仪的研制

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2023-10-09 DOI: 10.1002/ecj.12427

Miyu Katoh, Takeru Kanazawa, Yoshifusa Abe, Guanghao Sun, Takemi Matsui

{"title":"Development of a stand-alone portable respiratory rate monitor using a Doppler radar","authors":"Miyu Katoh, Takeru Kanazawa, Yoshifusa Abe, Guanghao Sun, Takemi Matsui","doi":"10.1002/ecj.12427","DOIUrl":"10.1002/ecj.12427","url":null,"abstract":"Respiratory rate (RR) is known to be a more accurate predictor of clinical deterioration than other vital signs. However, there were few respiration measurement devices certified as medical devices that could be used in daily clinical settings. Therefore, using a bult-in microcontroller (72×57×12 mm) instead of a personal computer, we developed a portable stand-alone respiration measurement device with minimum workload in computing that can be used for non-contact measurement in 30 s using a Doppler radar. In this study, the problems of respiration measurement using a Doppler radar, such as miscounting of respiratory peaks were clarified, and proposed device with respiratory peaks miscount prevention algorithm achieved high accuracy RR measurement. Clinical testing was conducted on pediatric outpatients of Children's Medical Center, Showa University Koto Toyosu Hospital. The measurement accuracy of the system was confirmed to be comparable to the respiration measurement accuracy of stationary certified medical devices used in hospital, such as capnometers and the chest wall impedance method used in bedside monitors.","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"106 4","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135147293","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