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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Doumani, Jacques Lou, Minhan Dewey, Oliver Hong, Nina Fan, Jichao Baydin, Andrey Pasquali, Matteo Yomogida, Yohei Yanagi, Kazuhiro Saito, Riichiro Kono, Junichiro Gao, Weilu Department of Electrical and Computer Engineering Rice University HoustonTX United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX United States Department of Electrical and Computer Engineering The University of Utah Salt Lake CityUT United States Carbon Hub Rice University HoustonTX United States Department of Chemical and Biomolecular Engineering Rice University HoustonTX United States J.A. Woollam Co. LincolnNE United States The Smalley-Curl Institute Rice University HoustonTX United States Department of Chemistry Rice University HoustonTX United States Department of Materials Science and NanoEngineering Rice University HoustonTX United States Department of Physics and Astronomy Tokyo Metropolitan University Tokyo Japan Department Physics Tohoku University Sendai Japan Department Physics and Astronomy Rice University HoustonTX United States

We demonstrate tunable, giant, and structure-induced deep-ultraviolet circular dichroism in macroscopically chiral assemblies of racemic carbon nanotubes prepared using two approaches: mechanical-rotation-assisted vac... 详细信息

ISBN: (纸本)9781957171258

关键词： Dichroism

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Improved Gain-Scheduled Control Design for Rational Nonlinear Discrete-Time Systems with Input Saturation

Improved Gain-Scheduled Control Design for Rational Nonlinea...

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European Control Conference (ECC)

作者： Gabriela L. Reis Rodrigo F. Araú jo Leonardo A. B. Tô rres Reinaldo M. Palhares Department of Technological Education Graduate Program in Electrical Engineering Federal University of Minas Gerais Federal Institute of Southeast Minas Gerais Minas Gerais Brasil Department of Control and Automation Engineering Amazonas State University Amazonas Brazil Department of Aerospace Engineering California Polytechnic State University CA USA Department of Electronics Engineering Federal University of Minas Gerais Minas Gerais Brazil

ISBN: (数字)9783907144077

ISBN: (纸本)9781665497336

An improved method of control design for rational nonlinear discrete-time systems with input saturation is proposed in this paper. Using Difference-Algebraic Representation (DAR) and parameter-dependent Lyapunov functions, a novel regional stabilization condition in terms of Linear Matrix Inequalities (LMI) is presented. Two optimization problems are addressed to either obtain the largest estimated Domain of Attraction (DoA) or minimize the $\ell_{2}$ -gain from the energy-bounded disturbance input to the performance output. Numerical examples illustrate the potential of the proposed approach.

关键词： Discrete-time systems Direction-of-arrival estimation Control design Finance Europe Estimation Linear matrix inequalities

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Impact of CLAHE-based image enhancement for diabetic retinopathy classification through deep learning 7

Impact of CLAHE-based image enhancement for diabetic retinop...

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7th International Conference on Computer Science and Computational Intelligence, CSCI 2022

作者： Hayati, Mira Muchtar, Kahlil Roslidar Maulina, Novi Syamsuddin, Irfan Elwirehardja, Gregorius Natanael Pardamean, Bens Department of Electrical and Computer Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Universitas Syiah Kuala Banda Aceh23111 Indonesia Faculty of Medicine Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Computer and Networking Engineering Politeknik Negeri Ujung Pandang Makassar90245 Indonesia Bioinformatics and Data Science Research Center Bina Nusantara University Jakarta 11480 Indonesia Computer Science Department BINUS Graduate Program-Master of Computer Science Program Bina Nusantara University Jakarta 11480 Indonesia

Diabetic retinopathy (DR) is a type of diabetes mellitus that attacks the retina of the eye. DR will cause patients to experience blindness slowly. Generally, DR can be detected by using a special instrument called an ophthalmoscope to view the inside of the eyeball. However, in conditions where there is a very small difference between the normal image and the DR image, computer-based assistance is needed for maximizing image reading value. In this research, a method of image quality improvement will be carried out which will then be integrated with a classification algorithm based on deep learning. The results of image improvement using Contrast Limited Adaptive Histogram Equalization (CLAHE) shows that the average accuracy of the method on several models is very competitive, 91% for the VGG16 model, 95% for InceptionV3, and 97% for EfficientNet compared to the results original image which only has an accuracy of 87% for VGG16 model, 90% for InceptionV3 model, and 95% for EfficientNet. However, in ResNet34 better accuracy is obtained in the original image with an accuracy of 95% while in the CLAHE image the accuracy value is only 84%. The results of this comprehensive evaluation and recommendation of famous backbone networks can be useful in the computer-Aided diagnosis of diabetic retinopathy. © 2022 Elsevier B.V.. All rights reserved.

关键词： Image enhancement

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FMCW Radar-Based Enhancing Moving Target Positioning Accuracy in Spectrogram Mapping

FMCW Radar-Based Enhancing Moving Target Positioning Accurac...

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International Conference on electrical engineering/electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： Nattakarn Shutimarrungson Seksan Eiadkaew Akkarat Boonpoonga Krit Athikulwongse Suramate Chalermwisutkul Department of Business Computer Mahasarakham Business School Mahasarakham University Maha Sarakham Thailand Department of Electrical and Computer Engineering Faculty of Engineering King Mongkut's University of Technology North Bangkok Bangkok Thailand Department of Electrical and Computer Engineering Faculty of Engineering Research Center of Innovation Digital and Electromagnetic Technology (iDEMT) King Mongkut's University of Technology North Bangkok Bangkok Thailand National Electronics and Computer Technology Center National Science and Technology Development Agency Pathumthani Thailand Communication and Smart System Engineering The Sirindhorn International Thai- German Graduate School of Engineering King Mongkut's University of Technology North Bangkok Bangkok Thailand

ISBN: (数字)9798350381559

ISBN: (纸本)9798350381566

In this paper, we propose a methodology aimed to enhancing the accuracy of moving target positioning using FMCW radar within spectrogram mapping. Utilizing a 10 GHz operating frequency, the FMCW radar effectively detects moving targets. However, the interpretation of intermediate frequency (IF) signals posed challenges due to multiple reflections and resulting ambiguous distances between objects. For solving this problem, we propose two steps of solution: employing an enveloping method and normalization of the IF signal. This process can extract maximum amplitude peaks specific to the target. Experimental validation involved detecting a drone moving away from the radar. Comparative analysis pre and post signal processing in spectrogram terms demonstrate the efficacy of our technique. Furthermore, verification of the detection range of radar was conducted using the GSM-015 GNSS speed meter. Results confirm the accuracy of the positioning capabilities of radar, emphasizing the effectiveness of the proposed approach.

关键词： Visualization Accuracy Refining Radar detection Radar Radar antennas Reflection

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Decentralized Multi-robot Collision-free Path Following Based on Time-varying Artificial Vector Fields and MPC-ORCA

Decentralized Multi-robot Collision-free Path Following Base...

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IEEE Latin American Robotics Symposium, LARS

作者： Elias J. R. Freitas Arthur Da C. Vangasse Guilherme V. Raffo Luciano C. A. Pimenta Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais UFMG Av. Antônio Carlos 6627 Belo Horizonte MG Brazil Federal Institute of Minas Gerais IFMG Department of Electronic Engineering Universidade Federal de Minas Gerais UFMG

This work focuses on the solution for multi-agent, collision-free, time-varying path-following problems in 3D spaces. The proposed solution is based on using time-varying artificial vector fields to generate velocity references for single agents. A distributed Model Predictive Control (MPC) scheme is employed, taking into account the system’s dynamics and collision avoidance features, enabling the multi-robot system to follow the dynamic field without collisions and providing great computational efficiency. More specifically, Optimal Reciprocal Collision Avoidance (ORCA) algorithm is used to set constraints, yielding a novel MPC-ORCA approach, for efficient collision avoidance in the multi-agent scenario. Simulation scenarios are used to validate and compare the proposed approach with traditional methods, highlighting its improvements.

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Highly responsive nonlinear sensor by tracking a Hamiltonian hopping point

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Photonics Research 2024年第10期12卷 2235-2241页

作者： ZHU LIU YIKUAN DENG XI TIAN ZHIPENG LI Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory of Physics and Devices in Post-Moore EraCollege of Hunan ProvinceSchool of Physics and ElectronicsHunan Normal UniversityChangsha 410081China Tsinghua-Berkeley Shenzhen Institute Institute of Data and InformationShenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore

Responsivity is a critical parameter for sensors utilized in industrial miniaturized sensors and biomedical implants,which is typically constrained by the size and the coupling with external reader,hindering their widespread applications in our daily ***,we propose a highly-responsive sensing method based on Hamiltonian hopping,achieving the responsivity enhancement by 40 folds in microscale sensor detection compared to the standard *** implement this sensing method in a nonlinear system with a pair of coupled resonators,one of which has a nonlinear ***,our method surpasses the sensing performance at an exceptional point(EP)—simultaneous coalescence of both eigenvalues and *** responsivity of our method is notably enhanced thanks to the large frequency response at a Hamiltonian hopping point(HHP)in the strong coupling,far from the *** study also reveals a linear HHP shift under different perturbations and demonstrates the detection capabilities down to sub-picofarad(<1 pF)of the microscale pressure sensors,highlighting their potential applications in biomedical implants.

关键词： Hamiltonian nonlinear point

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A Multi-objective Physiological Control for Continuous Flow Left Ventricular Assist Devices: Comparison of Estimator versus Sensor-based Feedback *

A Multi-objective Physiological Control for Continuous Flow ...

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

作者： Bruno Santos Idágene Cestari Biomedical Engineering Graduate Program Polythecnic School of Engineering University of Sao Paulo Av. Prof. Luciano Gualberto Sao Paulo Brazil Department of Electrical in Federal Institute of Sao Paulo and Department of Information Technology Universidade São Judas Tadeu Sao Paulo Brazil Bioengineering Laboratory Instituto do Coração InCor Hospital das Clínicas HCFMUSP Sao Paulo Brazil Biomedical Engineering Graduate Program Polytechnic School of Engineering University of Sao Paulo Sao Paulo Brazil

Left Ventricular Assist Devices have been successfully used for the treatment of Congestive Heart failure in patients who are not eligible for heart transplantation. This paper describes the implementation and comparison of the performance of a pressure sensor-based feedback controller. The strategies were tested on a mock loop of the systemic circulation. The results show that the use of pressure sensors generated a more accurate response of the controller compared to the use of *** Relevance— The study describes the integration of a LVAD physiological controller to a dynamic wireless monitoring system.

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Terahertz Time-Domain Imaging for Radiotherapy Treatment Monitoring in Pancreatic Ductal Adenocarcinoma

Terahertz Time-Domain Imaging for Radiotherapy Treatment Mon...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Debamitra Chakraborty Bradley N. Mills Jing Cheng Ivan Komissarov Scott Gerber Roman Sobolewski Materials Science Graduate Program University of Rochester Rochester New York Laboratory for Laser Energetics University of Rochester Rochester New York Department of Surgery University of Rochester Medical Center Rochester New York Department of Electrical and Computer Engineering University of Rochester Rochester New York

ISBN: (纸本)9798350369311

Terahertz time-domain imaging was performed of stereotactic body radiotherapy-treated murine pancreatic ductal adenocarcinoma (PDAC) with a high spatial resolution. To generate 2D maps of the tissue samples, the refractive index and absorption coefficient were used as imaging markers extracted with the maximum a-posteriori probability (MAP) estimation algorithm. The results were then compared with the terahertz maps of untreated murine PDAC tissue samples and demonstrated that terahertz imaging can probe physical changes with high sensitivity in the tissue post treatment.

关键词： Maximum a posteriori estimation Terahertz wave imaging Laser theory Sensitivity Refractive index Radiation therapy Time-domain analysis Spatial resolution Probes Monitoring

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Non-Hermitian metasurface with non-trivial topology

Non-Hermitian metasurface with non-trivial topology

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CLEO: QELS_Fundamental Science, QELS 2022

作者： Prasad, Ciril S. Yang, Frank Li, Weijian Lach, Rosemary Everitt, Henry O. Naik, Gururaj V. Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States U.S. Army DEVCOM Army Research Laboratory-South HoustonTX United States

The synergy between topology and non-Hermiticity in photonics holds potential for optical devices that are robust against defects. We demonstrate a non-Hermitian plasmonic-dielectric metasurface in the visible with no... 详细信息

ISBN: (纸本)9781557528209

关键词： Topology

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Need Analysis of Interactive Multimedia Development for Virtual Learning in Pandemic 4

Need Analysis of Interactive Multimedia Development for Virt...

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4th International Conference on electrical, electronics, Informatics, and Vocational Education, ICE-ELINVO 2021

作者： Lempas, J.F. Soenarto, S. Barahama, A.D. Instructional Technology Post-Graduate Program Universitas Negeri Yogyakarta Jalan Colombo 01 Daerah Istimewa Yogyakarta 55281 Indonesia Department of Electronics and Informatics Engineering Education Post-Graduate Program Universitas Negeri Yogyakarta Jalan Colombo 01 Daerah Istimewa Yogyakarta 55281 Indonesia

The pandemic that has not ended has an impact on changing the educational paradigm. Existing conditions demand to continue to use virtual learning. During the epidemic, this study will examine students' demand for interactive multimedia in virtual learning. The interviews reveal that the media that teachers provide in virtual learning during this pandemic has limits. Data was gathered through interviews and questionnaires given to teachers and students. The student requirements questionnaire reveals that interactive multimedia is the most effective instructional medium for pupils. This study is part of a larger investigation of the evolution of multimedia learning during a pandemic. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Students

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