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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 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-02-08 DOI: 10.1002/ecj.12388
Masaru Kamano, Kosuke Hironaka, Yuji Kawakami, Takanori Kozai, Takeshi Fujihara, Tao Zheng, Tomoya Konishi
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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 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-02-08 DOI: 10.1002/ecj.12394
Masashi Matsuda, Akira Hiroki

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.

本文利用量子漂移扩散(QDD)模型分析了纳米片MOSFET中的量子约束效应。QDD模型是一种器件模拟器,它允许模拟高级MOSFET的反转层中的量子限制效应。通过比较量子点散射和漂移扩散(DD)模型的模拟结果,分析了纳米片中的量子约束效应。DD与QDD的漏极电流比在VG=0.5V时为250.1%,在VG=0 V时为180.1%。当DD的最大电子密度存在于绝缘体和硅片之间的界面时,QDD的最大电子浓度接近硅片的中心。DD与QDD的电子面密度比在硅片的10nm宽度方向上为118.3%,在4nm宽度方向为176.9%。
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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 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-02-07 DOI: 10.1002/ecj.12385
Toshihiro Shimada, Hiroki Takehana, Ichiro Yamane

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.

通过实验和计算研究了金刚石表面与碱金属的相互作用。在600°C以上,Li与金刚石反应,观察到(100)表面的显著蚀刻。尝试将这种蚀刻反应应用于金刚石工具的放电加工。
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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 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2022-10-19 DOI: 10.1002/ecj.12380
Takuya Kinoshita, Haruka Kano, Toru Yamamoto

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 c into the learning algorithm. Furthermore, a control system is designed in which the estimated value using the soft sensor is fed back.

在工业中,很难测量产品质量等物理量。为了对其进行估计,提出了软传感器。近年来,准时制(JIT)方法引起了人们的关注。根据该方法,通过从数据库中提取与当前情况相似的数据来估计输出。另一方面,提出了一种数据库驱动的控制系统,其中JIT配备了学习算法。该方法利用数据库计算控制参数,并具有学习控制参数的方案,使控制误差最小化。本文提出了一种基于数据库驱动的软传感器设计方法。具体而言,本文提出了一种在不修改存储的过去数据的情况下提高估计精度的方法,该方法通过在学习算法中引入新的修饰符c来提高估计精度。在此基础上,设计了一种利用软传感器反馈估计值的控制系统。
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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 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2022-10-17 DOI: 10.1002/ecj.12383
Shu Morita, Yuki Okura, Chiaki Kojima

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.

在本文中,我们提出了一种有效的基于覆盖控制的人类密集躲避方法。我们的动机是从制度和控制理论出发,在新冠疫情的当前情况下,避免车站、政府机关等公共设施拥挤,避免人员密集。在本文中,人类和机器人分别被建模为异质和同质智能体,它们根据自身的局部信息做出决策。我们假设由于人类自身的内在动力,人类之间的交会造成了密集的情况。作为主要结果,我们提出了一种针对多人分布式运动的覆盖控制。我们还根据描述代理互连强度的增益,以及与代理相关的Voronoi区域的中心,分析地表征了驻点。此外,我们从工程的角度验证了密集回避表征的意义。最后,通过数值仿真验证了该方法的有效性。
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引用次数: 0
Attenuation band impedance matched BRF for measurements of electromagnetic noise 衰减带阻抗匹配BRF测量电磁噪声
IF 0.3 4区 工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2022-10-17 DOI: 10.1002/ecj.12378
Jun Hayashi, Yoshio Nikawa

Wireless communication devices such as wireless LANs and RFIDs are essential for smart home appliances and IoT (Internet of Things) devices in Smart Cities. When measuring the high-frequency noise generated by devices, wireless signals of wireless communication devices and high-frequency noise are measured at the same time. As a result, spectrum analyzers have insufficient dynamic range, or the excess signal from wireless communication devices causes harmonic distortion of the mixer inside the receiver, resulting in inaccurate measurements. Accordingly, a band rejection filter (BRF) is required to attenuate the radio signal. CISPR 16-2-3:2016+A1: 2019 assumes that impedances are matched for measurement, so if the impedance mismatch is large, the expanded uncertainty specified in CISPR 16-4-2:2011+A1:2014+A2:2018 increases. In this study, we propose a new BRF with impedance matching in the attenuation range and show its principle. As a result, the extended uncertainty could be reduced to 3.96 dB for the BRF of this study compared to 10.63 dB for the conventional BRF. In addition, the method comparison of CISPR 16-2-3:2016+A1: 2019 and vector network analyzer shows that the difference in attenuation of the conventional BRF was about −0.8 to 3.3 dB, whereas the BRF in this study were about −0.2 to 0.3 dB. The reduction of the expanded uncertainty and the good measurement results confirm the high usefulness of the CISPR 16-2-3 measurement system for the measurement of weak electromagnetic noise.

无线局域网和rfid等无线通信设备对于智慧城市中的智能家电和物联网设备至关重要。在测量设备产生的高频噪声时,要同时测量无线通信设备的无线信号和高频噪声。因此,频谱分析仪的动态范围不足,或者来自无线通信设备的过量信号导致接收机内部混频器的谐波失真,从而导致测量不准确。因此,需要带阻滤波器(BRF)来衰减无线电信号。CISPR 16-2-3:2016+A1: 2019假设测量阻抗匹配,因此如果阻抗不匹配很大,CISPR 16-4-2:2011+A1:2014+A2:2018中规定的扩展不确定度增加。在本研究中,我们提出了一种新的在衰减范围内阻抗匹配的BRF,并阐述了其原理。因此,与传统BRF的10.63 dB相比,该研究的BRF的扩展不确定性可以降低到3.96 dB。此外,CISPR 16-2-3:2016+A1: 2019与矢量网络分析仪的方法比较表明,传统BRF的衰减差异约为−0.8 ~ 3.3 dB,而本研究的BRF约为−0.2 ~ 0.3 dB。扩展不确定度的减小和良好的测量结果证实了CISPR 16-2-3测量系统对弱电磁噪声测量的高实用性。
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引用次数: 0
Evaluation of potential for peak demand reduction of residential buildings by household appliances with demand response 用有需求响应的家用电器来评估减少住宅高峰需求的潜力
IF 0.3 4区 工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2022-10-17 DOI: 10.1002/ecj.12379
Tetsushi Ono, Aya Hagishima, Jun Tanimoto

Residential appliances remotely controlled by IoT for demand response has attracted much attention for effective peak demand reduction of the uncertainty of consumers’ behaviors. To promote the technology development of such appliances, estimation of the potential for peak demand reduction according to the type of appliances is strongly needed. With this background, the authors conducted a data analysis of demand curves of not only the entire household but also the branches acquired at 496 dwellings in Osaka. Based on this analysis, the potential of peak reduction of aggregated demand of various groups with different dwelling size were quantified for major five appliances, namely air conditioners, microwave ovens, refrigerators, washing machines, and dish washers.

通过物联网远程控制的家用电器需求响应,有效降低了消费者行为的不确定性,引起了人们的广泛关注。为了促进这类电器的技术发展,迫切需要根据电器的类型估计高峰需求减少的潜力。在此背景下,作者对大阪496个住宅的整个家庭和分支机构的需求曲线进行了数据分析。在此基础上,对空调、微波炉、冰箱、洗衣机和洗碗机等五大家电的总需求峰值减少潜力进行了量化。
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引用次数: 0
Assist control for human-robot cooperative transportation systems using nonlinear disturbance observer 基于非线性扰动观测器的人-机器人协同运输系统辅助控制
IF 0.3 4区 工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2022-10-17 DOI: 10.1002/ecj.12382
Yuki Okura, Tomohiro Nakada, Chiaki Kojima

In this paper, we investigate an assist control for a system in which a human and a robot cooperate to transport an object toward a designated position and angle. We consider a situation where the force due to the human to the object cannot be measured directly. In order to tackle this situation, an assist control with a nonlinear disturbance observer is proposed. By using the observer, we estimate the control input due to the human from position and angle of the object. Moreover, we design the control input by the robot to assist the human input based on the estimates by the disturbance observer. The effectiveness of the proposed method is discussed by numerical simulations for the minimum jerk model.

在本文中,我们研究了一个辅助控制系统,其中一个人与机器人合作,以运送一个物体到一个指定的位置和角度。我们考虑一种情况,人对物体的力不能直接测量。为了解决这种情况,提出了一种带有非线性扰动观测器的辅助控制方法。通过使用观测器,我们从物体的位置和角度估计由于人的控制输入。此外,基于干扰观测器的估计,我们设计了机器人的控制输入来辅助人类的输入。通过最小扰动模型的数值模拟,讨论了该方法的有效性。
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引用次数: 0
Enhancement of photocatalytic degradation by combination of light illumination and bias voltages toward anti-virus coating applications 光照明和偏置电压相结合增强光催化降解对抗病毒涂层应用的影响
IF 0.3 4区 工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2022-10-14 DOI: 10.1002/ecj.12381
Keita Shimakura, Sho Saeki, Yuta Segawa, Taizo Kobayashi

In this work, oxidative decomposition reaction of organic reactant on TiO2 surface was investigated under soaking conditions by combination of applying voltages and light illumination. Since carriers of TiO2 thin films originate from point defects such as oxygen vacancies, reactive carriers possibly exist on TiO2 thin films even under room light illuminating condition and dark condition. Thus, enhancement degrees of photooxidation by applying bias voltages onto TiO2 thin films were compared under dark, visible light illumination and UV illumination conditions. Bias voltages were applied to localize the photogenerated carriers at the vicinity of TiO2 surface for enhancing photooxidation. Sol-gel derived TiO2 thin films with porous nano structure exhibited a stronger oxidative decomposition reaction than sputter-deposited TiO2 thin films.

本文通过施加电压和光照相结合的方法,研究了有机反应物在TiO2表面的氧化分解反应。由于TiO2薄膜的载流子来源于氧空位等点缺陷,因此即使在室内光照条件和黑暗条件下,TiO2薄膜上也可能存在活性载流子。因此,比较了在黑暗、可见光和紫外线照射条件下施加偏置电压对TiO2薄膜的光氧化增强程度。施加偏置电压使光生载流子定位在TiO2表面附近,以增强光氧化作用。溶胶凝胶法制备的多孔纳米TiO2薄膜比溅射法制备的TiO2薄膜表现出更强的氧化分解反应。
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引用次数: 0
Examination of insulation diagnosis in substation by neural network with phase-resolved partial discharge pattern reconstruction 基于相位分解局部放电模式重构的神经网络在变电站绝缘诊断中的应用
IF 0.3 4区 工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2022-09-20 DOI: 10.1002/ecj.12360
Shunya Fujioka, Hideaki Kawano, Masahiro Kozako, Masayuki Hikita, Osamu Eda, Shuhei Yaguchi, Yasuharu Shiina

Several studies for partial discharge (PD) pattern recognition using artificial neural network (ANN) were reported in the early 1990s. Usually, in an actual field such as a substation, data on partial discharge is scarcely available, or even rare. In many cases, the power supply phase required for the PRPD pattern cannot be easily obtained. We propose an ANN method that shifts the phase in which the maximum signal intensity detected with PD sensors is generated and used it as training and input data, even for the few phases resolved PD data available in the field. This ANN method was applied to the PRPD pattern obtained in a practical field. As a result, it was shown that the discrimination rate between PD and noise was improved, and therefore the proposed ANN method was found to be effective.

20世纪90年代初,人们对局部放电模式识别进行了一些人工神经网络(ANN)研究。通常,在变电站等实际现场,局部放电的数据很少,甚至很少。在许多情况下,PRPD模式所需的电源相位不能轻易获得。我们提出了一种人工神经网络方法,该方法将PD传感器检测到的最大信号强度产生的相位进行移位,并将其用作训练和输入数据,即使对于现场可用的少数相位已分解的PD数据也是如此。将该方法应用于实际领域中得到的PRPD模式。结果表明,该方法提高了PD和噪声的识别率,证明了该方法的有效性。
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引用次数: 0
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Electronics and Communications in Japan
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