检索结果-内蒙古大学图书馆

CsPbBr3 perovskite quantum-dot paper exhibiting a highest 3 dB bandwidth and realizing a flexible white-light system for visible-light communication

引用

Photonics Research 2021年第12期9卷 2341-2350页

作者： KONTHOUJAM JAMES SINGH XIAOTONG FAN ANNADA SANKAR SADHU CHUN-HO LIN FANG-JYUN LIOU TINGZHU WU YU-JUNG LU JR-HAU HE ZHONG CHEN TOM WU HAO-CHUNG KUO Department of Photonics&Institute of Electro-Optical Engineering College of Electrical and Computer EngineeringNational Yang Ming Chiao Tung UniversityHsinchu 30010Taiwan International Ph.D.Program in Photonics(UST) College of Electrical and Computer EngineeringNational Yang Ming Chiao Tung UniversityHsinchu 30010Taiwan Department of Electronic Science Fujian Engineering Research Center for Solid-State LightingXiamen UniversityXiamen 361005China School of Materials Science and Engineering University of New South WalesSydneyNSW 2052Australia Research Center for Applied Sciences Academia SinicaTaipei 11529Taiwan Department of Materials Science and Engineering City University of Hong KongKowloon TongHong KongChina

We propose a flexible white-light system for high-speed visible-light communication(VLC)applications,which consists of a semipolar blue InGaN/GaN single-quantum-well micro-light-emitting diode(LED)on a flexible substrate pumping green CsPbBr3 perovskite quantum-dot(PQD)paper in nanostructure form and red CdSe QD *** highest bandwidth for CsPbBr3 PQD paper,229 MHz,is achieved with a blue micro-LED pumping source and a high data transmission rate of 400 Mbps;this is very promising for VLC *** 817 MHz maximum bandwidth and a 1.5 Gbps transmission speed are attained by the proposed semipolar blue *** proposed flexible white light system and the high-bandwidth PQD paper could pave the way for VLC wearable devices.

关键词： pumping communication quantum

来源：评论

学校读者我要写书评

暂无评论

Optical IRS for Visible Light Communication: Modeling, Design, and Open Issues

arXiv

引用

arXiv 2024年

作者： Sun, Shiyuan Yang, Fang Mei, Weidong Song, Jian Han, Zhu Zhang, Rui The Department of Electronic Engineering Tsinghua University Beijing100084 China The National Key Laboratory of Wireless Communications University of Electronic Science and Technology of China Chengdu611731 China The Shenzhen International Graduate School Tsinghua University Shenzhen518055 China The Department of Electrical and Computer Engineering The University of Houston HoustonTX77004 United States The Department of Computer Science and Engineering Kyung Hee University Seoul446-701 Korea Republic of School of Science and Engineering Shenzhen Research Institute of Big Data The Chinese University of Hong Kong Guangdong Shenzhen518172 China The Department of Electrical and Computer Engineering National University of Singapore Singapore117583 Singapore

Optical intelligent reflecting surface (OIRS) offers a new and effective approach to resolving the line-of-sight blockage issue in visible light communication (VLC) by enabling redirection of light to bypass obstacles, thereby dramatically enhancing indoor VLC coverage and reliability. This article provides a comprehensive overview of OIRS for VLC, including channel modeling, design techniques, and open issues. First, we present the characteristics of OIRS-reflected channels and introduce two practical models, namely, optics model and association model, which are then compared in terms of applicable conditions, configuration methods, and channel parameters. Next, under the more practically appealing association model, we discuss the main design techniques for OIRS-aided VLC systems, including beam alignment, channel estimation, and OIRS reflection optimization. Finally, open issues are identified to stimulate future research in this area. Copyright © 2024, The Authors. All rights reserved.

关键词： Visible light communication

来源：评论

学校读者我要写书评

暂无评论

Real-time temperature correction for magnetoresistive biosensors integrated with temperature modulator

引用

Biosensors and Bioelectronics: X 2023年 14卷 100356页

作者： Kim, Songeun Wang, Shan X. Lee, Jung-Rok Division of Mechanical and Biomedical Engineering Ewha Womans University Seoul03760 Korea Republic of Graduate Program in Smart Factory Ewha Womans University Seoul03760 Korea Republic of Department of Materials Science and Engineering Stanford University StanfordCA93405 United States Department of Electrical Engineering Stanford University StanfordCA93405 United States

Magnetoresistance-based biosensors utilize changes in electrical resistance upon varying magnetic fields to measure biological molecules or events involved with magnetic tags. However, electrical resistance fluctuates with temperature. To decouple unwanted temperature-dependent signals from the signal of interest, various methods have been proposed to correct signals from magnetoresistance-based biosensors. Yet, there is still a need for a temperature correction method capable of instantaneously correcting signals from all sensors in an array, as multiple biomarkers need to be detected simultaneously with a group of sensors in a central laboratory or point-of-care setting. Here we report a giant magnetoresistive biosensor system that enables real-time temperature correction for individual sensors using temperature correction coefficients obtained through a temperature sweep generated by an integrated temperature modulator. The algorithm with individual temperature correction coefficients obviously outperformed that using the average temperature correction coefficient. Further, temperature regulation did not eliminate temperature-dependent signals completely. To demonstrate that the method can be used in biomedical applications where large temperature variations are involved, binding kinetics experiments and melting curve analysis were conducted with the temperature correction method. The method successfully removed all temperature-dependent artifacts and thus produced more precise kinetic parameters and melting temperatures of DNA hybrids. © 2023 The Authors

关键词： Kinetics

来源：评论

学校读者我要写书评

暂无评论

Assistive technology with device for self-inflating bag in neonatology

引用

Research on Biomedical engineering 2025年第2期41卷

作者： Marcelino, Ana Carolina Rodovanski, Giovana Pascoali Bonetti, Karoline Panes, Caio Rabinovich de Almeida Martins, Fernando Moran, Cristiane Aparecida Araranguá Brazil Graduate Program in Neurosciences and Behavior Department of Experimental Psychology of the Institute of Psychology-University of São Paulo Sao Paulo Brazil Araranguá Brazil Computer Engineering Instituto Mauá de Tecnologia São Caetano do Sul Brazil Electronic Engineering and Computing with Emphasis on Electronic Devices and Systems at Instituto Tecnológico de Aeronáutica–ITA São Caetano do Sul Brazil Department of Physiotheraphy and at the Postgraduate Program in Rehabilitation Science of the Federal University of Santa Catarina-UFCS Ararangua Brazil

Purpose: The objectives of this study were to create a device with technological development of the self-inflating bag (SIB) equipment to measure the variables tidal volume, peak inspiratory pressure, and inspiratory flow and to evaluate the knowledge of undergraduate students in handling the SIB. To reduce the risks of mortality, length of hospital stay, and infections, SIB is a resource used to ventilate the patient through the inflation of the device, but it is not capable of measuring the ventilatory parameters. Excess ventilation and incorrect handling of the bag can cause lung injury in newborns. Therefore, measuring these parameters can prevent lung injury resulting from inadequate ventilation. Method: This is a cross-sectional and experimental study, with the development of a device SIB that allows the evaluation of variables of neonatal respiratory mechanics that were tested with an artificial lung. It was approved by the Research Ethics Committee and the research was developed in three stages: the first represents the search for scientific articles for the consensus of neonatal ventilatory variables for the construction of the SIB parameters;the second stage depicts the technological development of a device capable of monitoring such variables through the SIB. In the third stage, the content validation of the device with the handling of the SIB was carried out by students of medicine and physiotherapy courses of Brazil. Results: In this work, a device that analyzes the values of the main ventilatory parameters in neonatology was developed and to generate a safety range for the use of the device, curves with a tolerance of 10% up and down were created. All electronic components were coupled to the equipment, with a display that transmits the parameter values. The web page can be used on a cell phone, tablet, computer, or SmartTv, as long as it is connected to the "RespiratorIoT_AP" network. Among the 29 participants in the study, 8 said they were familiar w

关键词： Students

来源：评论

学校读者我要写书评

暂无评论

Semipolar micro-LED for full-color display and visible light communication

Semipolar micro-LED for full-color display and visible light...

引用

International Conference on Display Technology, ICDT 2021

作者： Lin, Wansheng Huang, Yu-Ming Konthoujam, James Singh Lin, Yue Lu, Yijun Chen, Zhong Wu, Tingzhu Kuo, Hao-Chung School of Electronic Science and Engineering Fujian Engineering Research Center for Solid‐State Lighting Xiamen University Xiamen361005 China Department of Photonics and Graduate Institute of Electro-Optical Engineering College of Electrical and Computer Engineering National Chiao Tung University Hsinchu30010 Taiwan

Micro-LEDs (μ-LEDs) are well known to have a thriving future in the next-generation display field. However, conventional μ-LEDs grown on c-plane GaN have a severe wavelength shift due to the quantum confined Stark effect (QCSE), which seriously affects the color quality of μ-LEDs display. In order to fundamentally solve this problem, we grown blue μ-LED with a 30 μm diameter on the (20-21) semipolar GaN combined with perovskite quantum dots (PQDs) color conversion layer, to achieve high-quality full-color μ-LED, realizing a wide color gamut with 99.2% National Television Standards Committee (NTSC) space and 93.0% Rec. 2020 in the CIE 1931, and the peak wavelength hardly shifts, indicating an excellent inhibitory on QCSE. Meanwhile, the semipolar blue μ-LED excitation light can achieve a wide 3-dB bandwidth of 652 MHz due to the faster carrier recombination rate, making semipolar LEDs more attractive in the high-speed visible light communication (VLC). © 2021, John Wiley and Sons Inc. All rights reserved.

关键词： Perovskite

来源：评论

学校读者我要写书评

暂无评论

Field Implementation of a Plc-Controlled Single-Axis Sun Tracker in Commercial Pv Systems

SSRN

引用

SSRN 2024年

作者： de Almeida, Eduardo Santos Cupertino, Allan Fagner Mendes, Victor Flores Pereira, Heverton Augusto Souza, Silas Brito, Erick Matheus da Silveira Gusman, Lucas Soares Department of Electrical Energy UFJF MG Juiz de Fora Brazil Department of Electrical Engineering UFMG MG Belo Horizonte Brazil Institute of Exact and Technological Sciences UFV MG Viçosa Florestal Brazil Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais Av. Antônio Carlos 6627 MG Belo Horizonte31270-901 Brazil

Photovoltaic generation emerges as a promising solution in the transition towards more sustainable energy sources. Various configurations of solar power plants, ranging from fixed, single-axis to dual-axis orientations of photovoltaic modules, offer different efficiencies in solar capture. This study aims to introduce a single-axis solar tracker controlled by a programmable Logic Controller (PLC). By applying well-established equations from the literature, the algorithm estimates the daily solar position, adjusting to the specified latitude through a human-machine interface (HMI). The system is further enhanced with sensors to protect its physical structure, including limit switches and wind speed monitors. Beyond the hardware solution, this work also delves into the development of Python algorithms to assess the theoretical ideal performance of photovoltaic plants under various configurations (fixed, single, and dual-axis) and latitudes, and to compare the effectiveness of different solar tracker adjustment methodologies throughout the day. The results suggest that, depending on the axis configuration and latitude, the adoption of tracking systems can increase energy production by 20\% to 35\%. The practical implementation of the proposed tracker, tested over a year in Divinópolis, MG, Brazil, demonstrated an average increase of 25.23\% in energy production, compared to the fixed system, for plants in the range of 100 k$W_p$ capacity. Thus, this research validates the effectiveness of the PLC-controlled single-axis solar tracker in optimizing photovoltaic energy generation and contributes by providing a theoretical comparison between different solar tracking technologies. © 2024, The Authors. All rights reserved.

关键词： programmable logic controllers

来源：评论

学校读者我要写书评

暂无评论

Curriculum-Based Reinforcement Learning for an Effective Multi-Agent Path Planning Algorithm in Warehouse Scenarios

Curriculum-Based Reinforcement Learning for an Effective Mul...

引用

IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Iure Rosa L. De Oliveira Kevin B. De Carvalho Alexandre S. Brandão Graduate Program in Computer Science Universidade Federal de Viçosa Viçosa Brazil Electrical Engineering Department Universidade Federal de Vicosa Viçosa Brazil

Multi-robot systems can provide substantial increase in efficiency and/or flexibility in different scenarios. Applications in various settings have been studied in the literature, such as disaster management, surveillance, object transportation as well as search-and-rescue. A particular case that can highly benefit from the employment of multiple agents is the logistics in a warehouse scenario. This work proposes an multi-agent Q-learning based algorithm with curriculum learning and transfer learning to perform the path planning process. With progressively more complex stages of training as well as knowledge transfer from one stage to another, the algorithm is capable of achieve high success rates. In order to validate the proposed method, simulations were done to compare it to other combinations of the used techniques, as well as using Q-learning only. Scalability tests were also performed. The proposed method achieved up to 94% success rate after training.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Supercapacitor Portable System for Automatic Acquire of electrical Signals, Characterization and electrical Schematic Modeling for Microelectronic Device Application

Supercapacitor Portable System for Automatic Acquire of Elec...

引用

International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT)

作者： Mariana Da Silva Campos Gustavo Alves Dourado Arnaldo Kokke de Brito Rodrigo Lassarote Lavall Luciana Pedrosa Salles Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais Belo Horizonte Brazil Electrical Engineering Departament Universidade Federal de Minas Gerais Belo Horizonte Brazil Chemistry Department Universidade Federal de Minas Gerais Belo Horizonte Brazil

In this paper, new functionalities are presented for the Portable System for Automatic Acquire of electrical Signals for Supercapacitor Characterization (SAAES SC ) [1]. These supercapacitors can be used in low consumption electro-electronic devices, energy harvesting and Internet of Things (IoT) applications [2] [3] [4]. In addition to self-discharge test of supercapacitors, functions for testing galvanostatic charge and discharge cycling, automatic extraction of electrical parameters, supercapacitors circuit models and definition of test methodology were implemented. To validate the SAAES SC , it is used two supercapacitors to obtain measurements with both SAAES SC and VMP3 Multichannel Potentiostat from BioLogic [5]. Those measurements were compared, showing a mean percentage error of 0,23%.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Limitations Of the Derived Respiratory Variation Measurements Used in Functional Magnetic Resonance Imaging

Limitations Of the Derived Respiratory Variation Measurement...

引用

IEEE International Symposium on Biomedical Imaging

作者： Abdoljalil Addeh Karen Ardila Fernando Vega Ali Golestani M. Ethan MacDonald Department of Biomedical Engineering Department of Electrical & Software Engineering Department of Radiology Hotchkiss Brain Institute University of Calgary Calgary Canada Department of Electronic and Automation Biomedical Engineering Universidad Autónoma de Manizales Manizales Colombia Mitacs Globalink Research Internship Program Canada Department of Medical Physics Alberta Heath Services Canada

Among different physiological sources of noise in blood oxygenation level-dependent functional magnetic resonance imaging (BOLD-fMRI), low-frequency fluctuation in arterial carbon dioxide (CO 2 ) constitutes the strongest modulator of the BOLD signal. In this paper, the performance of respiration variation (RV) and respiratory volume per time (RVT) in identifying abnormal but prominent respiratory patterns are studied. We used Human Connectome Project in the Developmental dataset, as children are a challenging cohort in fMRI studies and have irregular breathing. According to our findings, there is no guarantee that a given respiratory event evident in the abdominal respiratory belt transducer timeseries, such as a deep breath or pause in breathing, will be detectable in both RVT and RV. In addition, RVT and RV do not show similar behavior during some respiratory events, especially when the subject breathes deeply at a low rate, while they use almost similar respiratory response functions.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Lesion-symptom mapping with NIHSS sub-scores in ischemic stroke patients

引用

Stroke & Vascular Neurology 2022年第2期7卷 124-131页

作者： Deepthi Rajashekar Matthias Wilms M Ethan MacDonald Serena Schimert Michael D Hill Andrew Demchuk Mayank Goyal Sean P Dukelow Nils Daniel Forkert Biomedical Engineering Graduate Program Hotchkiss Brain InstituteUniversity of CalgaryCalgaryAlbertaCanada Department of Radiology Cumming School of MedicineUniversity of CalgaryCalgaryAlbertaCanada Hotchkiss Brain Institute University of CalgaryCalgaryAlbertaCanada Department of Clinical Neurosciences University of CalgaryCalgaryAlbertaCanada Department of Electrical and Computer Engineering University of CalgaryCalgaryAlbertaCanada Department of Community Health Sciences Cumming School of MedicineUniversity of CalgaryCalgaryAlbertaCanada Department of Medicine Cumming School of MedicineUniversity of CalgaryCalgaryAlbertaCanada Alberta Children's Hospital Research Institute University of CalgaryCalgaryABCanada

Background Lesion-symptom mapping(LSM)is a statistical technique to investigate the population-specific relationship between structural integrity and post-stroke clinical *** clinical practice,patients are commonly evaluated using the National Institutes of Health Stroke Scale(NIHSS),an 11-domain clinical score to quantitate neurological deficits due to *** far,LSM studies have mostly used the total NIHSS score for analysis,which might not uncover subtle structure–function relationships associated with the specific sub-domains of the NIHSS ***,the aim of this work was to investigate the feasibility to perform LSM analyses with sub-score information to reveal category-specific structure–function relationships that a total score may not *** Employing a multivariate technique,LSM analyses were conducted using a sample of 180 patients with NIHSS assessment at 48-hour post-stroke from the ESCAPE *** NIHSS domains were grouped into six categories using two *** was conducted for each category of the two groupings and the total NIHSS *** Sub-score LSMs not only identify most of the brain regions that are identified as critical by the total NIHSS score but also reveal additional brain regions critical to each function category of the NIHSS assessment without requiring extensive,specialised *** These findings show that widely available sub-scores of clinical outcome assessments can be used to investigate more specific structure–function relationships,which may improve predictive modelling of stroke outcomes in the context of modern clinical stroke assessments and neuroimaging.

关键词： patients score category

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：