检索结果-内蒙古大学图书馆

2022 International Symposium on Antennas and Propagation (ISAP)

作者： Hiroto Sakaguchi Keisuke Noguchi Graduate Program in Electrical Engineering and Electronics Nonoichi Ishikawa Japan. Department of Electrical and Electronic Engineering Nonoichi Ishikawa Japan

ISBN: (数字)9781665479622

ISBN: (纸本)9781665479639

Highly efficient rectenna is demanded for wireless power transfer systems. We develop high-impedance wire-loop antennas in order to obtain high rectification efficiency in mm-wave band. We propose magnetic coupling with excited loop and wire so that the wire has role of efficient radiator. In the paper, simulations of a wire-loop antenna on an Alumina substrate are conducted. To get higher impedance and efficiency, we analyze the effects of antenna parameters on the antenna characteristics. Consequently, we designed the antenna with high resistance of 1280.6 $\Omega$ and radiation efficiency of 95.1%.

关键词： Resistance Couplings Rectennas Wires Wireless power transfer Information and communication technology Impedance

来源：评论

学校读者我要写书评

暂无评论

Investigation of Different Membrane Materials Effects in CMUT Membrane Behaviour

Investigation of Different Membrane Materials Effects in CMU...

引用

International Symposium on Multidisciplinary Studies and Innovative Technologies (ISMSIT)

作者： Abdullah İrfan YAŞAR Fikret YILDIZ Biomedical Engineering Graduate Program TOBB University Ankara Turkey Electrical and Electronics Engineering Department Hakkari University Hakkari Turkey

Research on Capacitive Micromachined Ultrasonic Transducers (CMUT), which is MEMS-based new transducer technology compared to piezoelectric in ultrasound applications, has recently increased. It is an important fact that micro and nano technologies provide convenience in many areas. CMUT technology has many advantages, such as its small size, the ease of integration with electronic materials and its compatibility with 2-dimensional geometries. In this study, the effect of different membrane material properties on displacement and output pressure of the CMUT membrane was investigated by assuming that it works in CMUT transmission mode and in the water media. SiC, Si, diamond, Si 3 N 4 , and polysilicon were used as membrane material. The membrane radius and thickness were selected as 60 μm and 2.6 μm, respectively. Collapse voltage and impedance values were calculated according to the structural properties of these materials. In addition, the mechanical structure of CMUT was taken into consideration and modeling was performed. Using this model created in the SIMULINK, the displacement and output pressure of CMUT membrane under various DC and AC voltages were analyzed. Under the same DC voltage, silicon membrane had the highest displacement and diamond membrane had the lowest displacement. Square shape wave was used as the AC excitation signal because the square wave was more efficient than the others. Some properties of the AC signal were changed and their effects were investigated. The most suitable material and working environment were tried to be found. Moreover, Si 3 Ni 4 membrane behavior also investigated under different electric field to understand effects of electrode size using same model in air. As a result, this study aims to contribute to efficient CMUT design and determination of optimum parameters and membrane material selection for various applications in the immersion and air.

关键词： Electrodes Acoustics Silicon Ultrasonic transducers Diamond Atmospheric modeling Biomembranes

来源：评论

学校读者我要写书评

暂无评论

Propagation Prediction Based on Time Domain Electric Field Integral Equation for Smoothly Irregular Terrains

Propagation Prediction Based on Time Domain Electric Field I...

引用

European Conference on Antennas and Propagation

作者： Rua Luz Barbosa Fernando Jose da Silva Moreira Electrical Engineering Graduate Program UFMG Belo Horizonte Brazil Dept. Electronics Engineering UFMG Belo Horizonte Brazil

This paper proposes a formulation to predict the propagation of a vertically polarized electromagnetic wave in the time domain using the Electric Field Integral Equation over an irregular terrain for a near grazing incidence. The results show good agreement when compared with the ones obtained from the Magnetic Field Integral Equation and the Uniform Theory of Diffraction, both in the time domain.

关键词：

来源：评论

学校读者我要写书评

暂无评论

First Demonstration of HZO-LNOI Integrated Ferroelectric Electro-Optic Modulator and Memory to Enable Reconfigurable Photonic Systems

First Demonstration of HZO-LNOI Integrated Ferroelectric Ele...

引用

2023 International Electron Devices Meeting, IEDM 2023

作者： Xu, Zefeng Chen, Chun-Kuei Lin, Hong-Lin Gao, Yuan Ke, Wei Xu, Baochang Dmitriev, Pavel Arbiz, Carlan Zamburg, Evgeny Touzard, Steven Cai, Xinlun Lee, James Venkatesan, Suresh Danner, Aaron Thean, Aaron Voon-Yew Department of Electrical and Computer Engineering Singapore Nus Graduate School Integrative Sciences and Engineering Program Singapore 117583 Singapore School of Electronics and Information Technology 117583 Singapore Centre for Quantum Technologies Nus Singapore Poet Technologies Canada Sun Yat-Sen University 510275 China

ISBN: (纸本)9798350327670

We have successfully demonstrated, for the first time, an innovative back-end-of-line (BEOL) compatible electro-optic modulator and memory (EOMM) based on Lithium Niobate on Insulator (LNOI) micro-ring resonator (MRR) integrated with Ferroelectric Hafnium Zirconate Hf0.5Zr0.5O (HZO) non-volatile analog memory. High non-volatile memory and modulation performances are both achieved in a single compact device, exhibiting high extinction ratio of 13.3 dB, excellent efficiency of 66pm/V, stable nine-state switching, record-high endurance exceeding 109 cycles. This is accomplished by utilizing Pockels effect in LNOI, induced by electric-field effect from remnant HZO ferroelectric polarization. We studied the system implementation of reconfigurable chiplet-interposer photonic interconnect, enabled by the EOMM and EOMM with hybrid thermal-optical modulation. Our model shows a potential 70% energy efficiency improvement over conventional electrical interposer interconnect. We have also tested the integration of the EOMM with POET technologies' 400G Tx/Rx optical interposer chip and studied a limited scale demonstration of the EOMM device. © 2023 IEEE.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Contamination-free cell lysis microfluidic device using cell cross over

Contamination-free cell lysis microfluidic device using cell...

引用

13th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2009

作者： Mun, Byung Phil Jung, Seung Mo Yoon, Sang Youl Lee, Jong Hyun Yang, Sung School of Information and Mechatronics Gwangju Institute of Science and Technology Korea Republic of Graduate Program of Medical System Engineering Gwangju Institute of Science and Technology Korea Republic of Department of Nanobio Materials and Electronics Gwangju Institute of Science and Technology Korea Republic of

ISBN: (纸本)9780979806421

Complicated and time-consuming cell purification processes prevent a micro cell lysis device from integrating with LOC (Lab-on-a-chip) or μ-TAS (μ-Total Analysis System) devices for cell analysis. In this paper, we present a microfluidic cell lysis device using a contamination-free cell cross over method in order to minimize the cell pretreatment procedure. © 2009 CBMS.

关键词： Microfluidics

来源：评论

学校读者我要写书评

暂无评论

Development of Computer-aided Diagnosis System for Gastric Disease based on Deep Learning and Visualization using Grad-CAM

引用

Transactions of the Korean Institute of Electrical Engineers 2023年第2期72卷 234-240页

作者： Lee, Han-Sung Cho, Hyun-Chong Dept. of Electronics Engineering and Interdisciplinary Graduate Program for BIT Medical Convergence Kangwon National University Korea Republic of Dept. of Interdisciplinary Graduate Program for BIT Medical Convergence Kangwon National University Korea Republic of

Gastric cancer ranked first in the incidence of cancer in Korea from 2015 to 2018, and it is a trend that many people suffer from regardless of gender. Because the cause of gastric cancer is not clear and early gastric cancer has no specific symptoms, patients often miss the appropriate treatment time. Gastric endoscopy is the most effective method for diagnosing gastric cancer, but early gastric cancer accompany only subtle changes that are difficult to distinguish with the naked eye, and the diagnosis accuracy may vary depending on the proficiency of the specialist. Therefore, we proposed an EfficientNetV2-L-based Computer-assisted Diagnosis (CADx) system for gastric diseases in this paper. EfficientNetV2 is a network that can have high classification performance for gastric diseases even with a small number of parameters as a model designed using the Training-NAS method. In general, the diversity of data affects the performance of deep learning models. So, we augmented data using Cifar10 augmented policy. Through this method, sensitivity was improved from 0.878 to 0.966 in early gastric cancer and normal classification, and from 0.690 to 0.817 in abnormal and normal classification. In addition, we tried to visualize the region of interest of the model for the location of the lesion by applying Grad-CAM. Copyright ©The Korean Institute of Electrical Engineers.

关键词： Diseases

来源：评论

学校读者我要写书评

暂无评论

Solar Cell Defect Detection System through Image Augmentation with Filtering

引用

Transactions of the Korean Institute of Electrical Engineers 2023年第3期72卷 428-433页

作者： Kim, Tae-Kyeong Cho, Hyun-Chong Dept. of Electronics Engineering and Interdisciplinary Graduate Program for BIT Medical Convergence Kangwon National University Korea Republic of Dept. of Interdisciplinary Graduate Program for BIT Medical Convergence Kangwon National University Korea Republic of

The need for renewable energy is increasing due to problems such as environmental pollution and resource depletion. Solar energy is the largest type of renewable energy and is increasing. However, when a micro-crack is formed in a solar cell, it greatly affects the photovoltaic power generation system. This degrades the performance of the solar power system and can be easily damaged. In this paper, solar cell defects were detected through Electroluminescent (EL) images. The Vision Transformer-Huge model was used to extract solar cell defect features. In addition, the CIFAR-10 augmentation policy and Imagenet augmentation policy included in Auto-augment were used to increase the performance of the model for the small dataset. When using the augmentation policy, the characteristics of the solar cell defect may disappear from the data, so filtering was performed with the model learned from the original data. For filtering, only images with a prediction probability of 70% or more of augmented images through the Soft-max function were used. When comparing the performance of the proposed methods and the method learned with the original data, it showed excellent performance. As a result, the proposed model showed a performance improvement of about 5% based on accuracy, and a recall value of about 93% was obtained. Copyright © The Korean Institute of Electrical Engineers.

关键词： Solar cells

来源：评论

学校读者我要写书评

暂无评论

A Study on the Computer Aided Diagnosis System for Early Gastric Cancer Lesion Based on EfficientNetV2-L through Data Filtering

引用

Transactions of the Korean Institute of Electrical Engineers 2022年第9期71卷 1259-1265页

作者： Lee, Han-Sung Cho, Hyun-Chong Dept. of Electronics Engineering Interdisciplinary Graduate Program for BIT Medical Convergence Kangwon National University Korea Republic of Dept. of Interdisciplinary Graduate Program for BIT Medical Convergence Kangwon National University Korea Republic of

Gastric cancer is a common cancer worldwide, especially in Korea. Early diagnosis is very important to increase the full recovery rate. However, early gastric cancer has no special symptoms and is a disease that even experts find difficult to diagnose in gastroscopy. Therefore, in this paper proposed a computer-aided diagnosis(CADx) for early gastric cancer diagnosis using EfficientNetV2-L. Due to the nature of medical data, it is difficult to collect a large amount of data. The data used for training was augmented using Cifar10 policy of the Google's AutoAugment. Additionally, the augmented image was used as an input to the model trained with the original dataset and filtered according to the classification threshold. EfficientNetV2 is a classification network designed Training-NAS that can learn the feature of lesions with a small number of parameters. As a result, EfficientNetV2 set to the threshold value of 0.9 achieved the performance of accuracy 0.943 for early gastric cancer and abnormal image classification. The AUC value also increases from 0.972 to 0.991, showing that the data filtering method of this study was effective for improvement of classification performance. © 2022 Korean Institute of Electrical Engineers. All rights reserved.

关键词： Computer aided diagnosis

来源：评论

学校读者我要写书评

暂无评论

Comparison between wire and wireless EEG acquisition systems based on SSVEP in an Independent-BCI

Comparison between wire and wireless EEG acquisition systems...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Richard M. G. Tello Sandra M. T. Müller Teodiano Bastos-Filho Andre Ferreira Post-Graduate Program of Electrical Engineering (PPGEE). UFES Vitoria Brazil Department of Computer and Electronics (CEUNES) Brazil

This paper presents a comparison between two different technologies of acquisition systems (BrainNet36 and Emotiv Epoc) for an Independent-BCI based on Steady-State Visual Evoked Potential (SSVEP). Two stimuli separat... 详细信息

关键词： Visualization Electrodes Indexes Accuracy Brain-computer interfaces Synchronization Feature extraction

来源：评论

学校读者我要写书评

暂无评论

Application of deep learning-based image segmentation algorithm for Korean cattle weight estimation

引用

Transactions of the Korean Institute of Electrical Engineers 2021年第9期70卷 1336-1344页

作者： Lee, Chang-Bok Cho, Hyun-Chong Dept. of Electronics Engineering and Interdisciplinary Graduate Program for BIT Medical Convergence Kangwon National University Korea Republic of Dept. of Interdisciplinary Graduate Program for BIT Medical Convergence Kangwon National University Korea Republic of

Image-based weight measurement is a novel approach for reducing the manpower consumption of Korean cattle farms without causing stress to animals. In this paper, the weight was predicted by measuring the area of Korean cattle and estimating the weight correlation factors. Using the histogram sum from the acquired image data, repeated data was removed and learning efficiency was improved, and the Mask R-CNN model was trained with the selected data. Mask R-CNN uses RoIAlign and is a model capable of precise segmentation by replacing the Softmax activation function of FCN with sigmoid. The result of territorial division of Korean cattle in the background of an actual barn reached an average precision of 0.88 with confidence standards of average IoU 0.88 and 0.85. The size of the mask obtained as a result of segmentation had a maximum correlation of 0.88 with the body weight, and the minor axis length and major axis length of the optimal ellipse calculated through the mask had a correlation of 0.35 and 0.56, respectively. The weighted average of the error rate of the weight prediction results using these three weight correlation factors was 0.07. Copyright © The Korean Institute of Electrical Engineers.

关键词： Image segmentation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：