检索结果-内蒙古大学图书馆

11th International Conference on Power Electronics - ECCE Asia, ICPE 2023-ECCE Asia

作者： Li, Zheqing Jin, Feng Zhao, Chunyang Hsieh, Eric Li, Qiang Virginia Polytechnic and State University Center for Power Electronic Systems Bradley Department of Electrical and Computer Engineering BlacksburgVA24061 United States

ISBN: (纸本)9788957083505

DC-DC converters are a critical component for the auxiliary power supplies in railway applications to regulate wide range input voltage. With the power consumption increasing, the momentum toward high-power high-density continues unbated. The key to shrink the converter size is high-frequency operation. The bottleneck is the magnetic component, especially for the high-power converters. With wide-band gap (WBG) devices, frequency can be hundreds of kilohertz level, which can reduce the transformer volume significantly. By adopting the shorting control for gain boost, only a small resonant inductance is required to handle the wide input voltage. The low inductance provides the opportunity to integrate the resonant inductor into the transformer to further reduce the size of magnetic components. In this paper, a novel transformer is proposed with the integration of additional leakage inductor for resonance with evenly distributed core loss, and no sacrifice the winding loss and. A 30-kW 100-kHz prototype with 2.4 kW/L power density is built to verify the feasibility of the proposed transformer, whose peak efficiency reaches 99.2%. © 2023 The Korean Institute of Power Electronics.

关键词： Energy gap

来源：评论

学校读者我要写书评

暂无评论

Performance Analysis of a Flexible HPTS-Based Carbon Dioxide Sensor for Transcutaneous Blood Gas Monitoring

Performance Analysis of a Flexible HPTS-Based Carbon Dioxide...

引用

2023 IEEE Biomedical Circuits and Systems Conference, BioCAS 2023

作者： Tufan, Tuna B. Golemi, Kleo Apinis, Evan Pano, Kosti Hetzler, Zach Wei, Qingshan Guler, Ulkuhan Worcester Polytechnic Institute Department of Electrical and Computer Engineering WorcesterMA United States North Carolina State University Department of Chemical and Biomolecular Engineering RaleighNC United States

ISBN: (纸本)9798350300260

Traditional transcutaneous carbon dioxide sensing methods often require frequent calibration and the replacement of measurement electrodes, often deployed in large devices. In our pursuit of developing an accurate and noninvasive method for transcutaneous carbon dioxide sensing, we have introduced the utilization of a carbon dioxide-sensitive flexible sensor patch consisted of 8-hydroxypyrene-1,3,6-trisulfonate. To assess its performance, we have designed custom circuitry and conducted various tests to evaluate the sensor's reactivity to changes in the partial pressure of carbon dioxide, as well as its response to external parameters, such as excitation intensity, measurement drift, humidity, and temperature. Through our testing, we implemented a ratiometric approach and discovered that the sensor exhibits a linear relationship between the luminescence ratio and changes in carbon dioxide partial pressure. Within the clinically relevant range, we successfully measured carbon dioxide partial pressure, showing a variation of less than 3.9% across different levels of excitation intensity. © 2023 IEEE.

关键词： HPTS-based Carbon Dioxide Sensor Noninvasive Blood Gas Measurement Physiological Monitoring Remote Monitoring Transcutaneous Carbon Dioxide Sensing Wearable Devices

来源：评论

学校读者我要写书评

暂无评论

Simulated deep CT characterization of liver metastases with high-resolution filtered back projection reconstruction

引用

Visual Computing for Industry,Biomedicine,and Art 2024年第1期7卷 257-271页

作者： Christopher Wiedeman Peter Lorraine Ge Wang Richard Do Amber Simpson Jacob Peoples Bruno De Man Department of Electrical and Computer Engineering Rensselaer Polytechnic InstituteTroyNY 12180USA GE Research-Healthcare NiskayunaNY 12309USA Department of Biomedical Engineering Rensselaer Polytechnic InstituteTroyNY 12180USA Department of Radiology Memorial Sloan Kettering Cancer CenterNew YorkNY 10065USA Biomedical Computing and Informatics Queen’s UniversityKingstonON K7L 3N6Canada

Early diagnosis and accurate prognosis of colorectal cancer is critical for determining optimal treatment plans and maximizing patient outcomes,especially as the disease progresses into liver *** tomography(CT)is a frontline tool for this task;however,the preservation of predictive radiomic features is highly dependent on the scanning protocol and reconstruction *** hypothesized that image reconstruction with a highfrequency kernel could result in a better characterization of liver metastases features via deep neural *** kernel produces images that appear noisier but preserve more sinogram information.A simulation pipeline was developed to study the effects of imaging parameters on the ability to characterize the features of liver *** pipeline utilizes a fractal approach to generate a diverse population of shapes representing virtual metastases,and then it superimposes them on a realistic CT liver region to perform a virtual CT scan using *** of 10,000 liver metastases were generated,scanned,and reconstructed using either standard or high-frequency *** data were used to train and validate deep neural networks to recover crafted metastases characteristics,such as internal heterogeneity,edge sharpness,and edge fractal *** the absence of noise,models scored,on average,12.2%(α=0.012)and 7.5%(α=0.049)lower squared error for characterizing edge sharpness and fractal dimension,respectively,when using high-frequency reconstructions compared to ***,the differences in performance were statistically insignificant when a typical level of CT noise was simulated in the clinical *** results suggest that high-frequency reconstruction kernels can better preserve information for downstream artificial intelligence-based radiomic characterization,provided that noise is *** work should investigate the informationpreserving kernels in datasets with clinical labels.

关键词： Radiomics Deep learning Computed tomography Colorectal liver metastases Virtual clinical trials Image reconstruction

来源：评论

学校读者我要写书评

暂无评论

Analysis of a Transformerless High Step-Down DC-DC Converter

Analysis of a Transformerless High Step-Down DC-DC Converter

引用

2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023

作者： Truong, Phan Nhat Anh Dung, Nguyen Liu, Yu-Chen Chiu, Huang-Jen National Taiwan University of Science and Technology Department of Electronic and Computer Engineering Taipei Taiwan Virginia Polytechnic Institute and State University Department of Electrical and Computer Engineering Blacksburg United States National Taipei University of Technology Department of Electrical Engineering Taipei Taiwan

ISBN: (纸本)9798350316445

The analysis and performance of a proposed high step-down DC-DC converter without employing transformers are discussed in this article. The operating principle of the control signals in this proposed converter is similar to the traditional two-phase interleaved buck converter, resulting in a simple controller. Moreover, the proposed converter has lower switches' voltage stress than the traditional buck converter. Therefore, the low voltage rating switches can be considered to achieve low losses, high efficiency, and low cost. Besides, the comparisons between the proposed converter and the previous high step-down topologies are presented to show the benefits of the proposed topology such as lower passive component count and higher effective duty cycle range. The experimental results of the 48W prototype have been provided to validate the theoretical analysis. © 2023 IEEE.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A Transformer Design with PCB Litz Wire Concept for Solid State Transformer

A Transformer Design with PCB Litz Wire Concept for Solid St...

引用

2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023

作者： Li, Zheqing Jin, Feng Lou, Xin Hsieh, Yi-Hsun Li, Qiang Lee, Fred C. Virginia Polytechnic and State University Center for Power Electronic Systems Bradley Department of Electrical and Computer Engineering BlacksburgVA24061 United States

ISBN: (纸本)9798350316445

Litz wire is known for its ability to minimize winding losses in high-frequency applications. However, its implementation in PCB winding poses significant challenges. This paper presents a novel PCB Litz wire concept aimed at minimizing winding loss in high-frequency applications, specifically in the design of a solid-state transformer using PCB-winding-based technology. The proposed PCB Litz wire is designed in a circular winding configuration with curved strands, optimizing its performance. The construction method and the turn-to-turn connection are demonstrated. Factors affecting the resistance of the PCB Litz wire, including the number of strands, their width, and section, are discussed. The results show that compared to traditional PCB winding, the PCB Litz wire achieves a 30% reduction in winding loss and significantly improves current distribution, leading to enhanced thermal performance. To validate the concept's effectiveness, a prototype of a 1.6/1.05kV, 190kHz, 30-kW CLLC converter is built, demonstrating an impressive 98.8% efficiency. © 2023 IEEE.

关键词： PCB Litz PCB winding Solid-state transformer (SST) Transformer design

来源：评论

学校读者我要写书评

暂无评论

Cyber Anomaly Detection Design for Microgrids using an Artificial Intelligent-Based Method

Cyber Anomaly Detection Design for Microgrids using an Artif...

引用

2022 North American Power Symposium, NAPS 2022

作者： Toker, Onur Khalghani, Mohammad Reza Florida Polytechnic University Department of Electrical and Computer Engineering LakelandFL33805 United States

ISBN: (纸本)9781665499217

Due to the heavy integration of cyber and communication networks to microgrids, cyber disruptions can more adversely impact the entire grid and distort the load supply. Therefore, this paper focuses on developing a cyber anomaly detection based on an autoencoder neural network that is an unsupervised learning approach. The autoencoder neural network is generally beneficial for microgrid applications since it can handle unwanted information, such as communication channel noises. The proposed cyber anomaly detection technique is implemented on a microgrid's load frequency control (LFC) subject to cyber intrusions on measurements. The simulation results prove the efficacy of the proposed detection method for an islanded microgrid. © 2022 IEEE.

关键词： Anomaly detection

来源：评论

学校读者我要写书评

暂无评论

Packaging of 15-kV Silicon Carbide Half-Bridge Module Enabled by a Nonlinear Resistive Polymer Nanocomposite Field-Grading Coating 10

Packaging of 15-kV Silicon Carbide Half-Bridge Module Enable...

引用

10th IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2023

作者： Zhang, Zichen Lu, Shengchang Nicholas, Carl Lynch, Justin Morgan, Adam Sung, Woongje Ngo, Khai D.T. Lu, Guo-Quan Virginia Tech Blacksburg CPES The Bradley Department of Electrical and Computer Engineering United States College of Nanoscale Science and Engineering SUNY Polytechnic Institute Albany United States

ISBN: (纸本)9798350337136

Emerging medium-voltage silicon carbide devices offer the potential to achieve more efficient and compact power electronics for grid-Tied applications. However, the lack of an effective insulation solution for packaging the devices has slowed their widespread adoption. In this work, a 15-kV silicon carbide MOSFET half-bridge module was designed and fabricated. The module was built by silver-sintering the device chips on an aluminum nitride direct-bond-copper substrate with 1.0-mm thick ceramic. The insulation of the module was enhanced by coating a nonlinear resistive polymer nanocomposite along the electrode edges on the substrate prior to silicone-gel encapsulation. The field-grading effect of the coating was tested on aluminum nitride direct-bond-copper substrates. The coated substrates showed an average partial discharge inception voltage of 20.2 kVpeak, which is 85% higher than the uncoated ones and 33% higher than the devices' rated voltage. Finally, prototypes of the modules with functional 15-kV dice were fabricated and tested. The blocking capability of the devices were unchanged after packaging. The fabricated modules in this work will serve as testbed for evaluating the coating's effectiveness under fast pulse-width modulation excitations during switching tests. © 2023 IEEE.

关键词： Substrates

来源：评论

学校读者我要写书评

暂无评论

Analysis of a PM-Assisted Synchronous Reluctance Machine for Electric Veihicles

Analysis of a PM-Assisted Synchronous Reluctance Machine for...

引用

2022 IEEE International Conference on "Power Electronics, Smart Grid, and Renewable Energy", PESGRE 2022

作者： Barman, Dwaipayan Chowdhury, Vikram Roy Iqbal, Mohammad Tauquir Barman, Debabrata Department of Electrical and Computer Engineering Concordia University Montreal Canada Department of Electrical and Computer Engineering Georgia Institute of Technology Atlanta United States School of Electrical and Electronic Engineering Nanyyang Tcehnological University Singapore Jalpaiguri Polytechnic Institute Department of Electrical Engineering India

ISBN: (纸本)9781665448376

although motors that use rare-earth permanent magnets (PM) typically provide high efficiency and power density, their cost is high. A high torque density ferrite permanent magnet assisted synchronous reluctance machine (PMASynRM) is presented to demonstrate its feasibility in electric vehicle (EV) applications considering productivity and a liquid cooling system is available. The performance of the proposed PMASynRM is evaluated based on finite element analysis (FEA). The parametric analysis of the PMASynRM is performed in terms of average torque and torque ripple by changing the web thickness and bridge thickness in the rotor. The performance of the PMASynRM is investigated with three different rotors and the rotor with sufficient average torque and lower torque ripple is selected as the best design. A high flux weakening range is achieved with a maximum speed of 9000 rpm. Also, a thermal analysis is performed. © 2022 IEEE

关键词： Thermoanalysis

来源：评论

学校读者我要写书评

暂无评论

DeePaGait: Motor Assessment of Parkinson's Disease Using a Multi-Layer 1D Convolutional Neural Network on Smartphone Gait Data

DeePaGait: Motor Assessment of Parkinson's Disease Using a M...

引用

2022 IEEE International Conference on Big Data, Big Data 2022

作者： Abujrida, Hamza Agu, Emmanuel Pahlavan, Kaveh Worcester Polytechnic Institute Department of Electrical and Computer Engineering WorcesterMA01609 United States

ISBN: (纸本)9781665480451

Nearly 1 million people in the USA and 10 million people worldwide are living with Parkinson's disease (PD) [1]. The progression of the disease can be inferred from the changes in the patients' gait to inform early intervention. Due to their near-ubiquitous ownership, smartphone sensing is a very effective, highly available way of assessing gait. Objectives: In this work, we explore the inference of PD gait, by analyzing the patient's walk data collected from a smartphone in the patients' homes, using Deep Learning (DL) methods. Specifically, we investigate DL models to classify the severity of the motor part of the UPDRS (MDS-UPDRS 2.10-2.13). Methodology: Using data from the mPower study [2], we selected 152 PD patients who recorded at least 3 walks before taking their medication. We extracted gait cycles from the accelerometer and gyroscope sensor records and fed them to DeePaGait;our DL multi-layer Conventional Neural Network (CNN). DeePaGait operates on 1Dimensional convolution filters to classify 30 seconds of walking data into one of five severity levels (Normal, Slight, Mild, Moderate, Severe). Results: Our DeePaGait DL network was able to Classify the PD Walking-Balance, Shaking/Tremor, and Freeze of Gait (FoG) symptoms, with an accuracy of: 99.1%,98.4%, and 98.2% respectively. Conclusion: Despite the challenges of working with a patient-labeled, crowdsourced dataset, we were able to demonstrate that gait classification based on smartphone sensor data is a viable approach to infer the severity of PD gait anomalies. © 2022 IEEE.

关键词： Smartphones

来源：评论

学校读者我要写书评

暂无评论

From Making Spaces to Making Change: The Future of Making in ECE 53

From Making Spaces to Making Change: The Future of Making in...

引用

53rd IEEE ASEE Frontiers in Education International Conference, FIE 2023

作者： Jordan, Shawn Cheville, Alan Smith, Casey The Polytechnic School Ira A. Fulton Schools of Engineering Arizona State University MesaAZ United States Bucknell University Department of Electrical & Computer Engineering LewisburgPA United States University of Illinois Urbana-Champaign Department of Electrical & Computer Engineering UrbanaIL United States

ISBN: (纸本)9798350336429

In this paper, we discuss the results and key findings of a daylong 'Making and Makerspaces in electrical and computer engineering' (ECE) workshop hosted in conjunction with the ECE department Heads Association Annual Conference in 2022. This workshop brought together thought leaders in making and makerspaces from across ECE, engineering education, and the broader maker community to discuss the current state of (change)making in ECE, making with purpose, and anti-racist engineering spaces in addition to live maker activities at lunch and an unconference to discuss community, partnerships, and ECE in mechanical engineering makerspaces. Broadly, a key finding from the conference was the need to shift the conversation from talking about making spaces (which tend to focus more on the equipment and facilities management) to ecosystems of making change, including culture, identity, community partnerships, shifting from labs to makerspaces, and shifting from spaces to makerspaces. Another key finding was an ecosystem view of possible touchpoints for making in an engineering program, including making in pre-college, making for recruitment, making in undergraduate design classes, making in extracurricular settings, making for fun, and making at home - all leading toward growing a thriving, diverse engineering workforce of the future. The themes that emerged from the workshop discussions were summarized and presented to department heads about how makerspaces connect to broader efforts in the ECE community such as how to become more equitable and inclusive, how to rebrand programs to attract new students, and promote best practices in educating 21st century learners. © 2023 IEEE.

关键词： DEI design ECE makerspace making

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：