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Plasmonics in Biology and Medicine XXI 2024

作者： Cui, Guangjie Kim, Do Young Zu, Di Chai, Guanbo Lee, Somin Eunice Department of Electrical & Computer Engineering Biomedical Engineering Applied Physics Biointerfaces Institute Macromolecular Science & Engineering University of Michigan Ann ArborMI United States

ISBN: (纸本)9781510669796

Phase intensity nanoscope (PINE) is a new super-resolution method to further improve the resolution of existing techniques. PINE utilizes an integrated phase-intensity device to modulate phase differences between electric field components to distinguish nanoprobes within a diffraction-limited region. This phase-intensity separation enables continuous imaging without photobleaching. PINE achieved sub-10nm resolution of cellular structures through precise localization of populations of randomly distributed nanorod probes. The distribution of localized nanorods forms patterns of underlying structures. By defining features from probe distribution patterns and minimizing the distances of each probe to its feature projection, PINE extracts sub-10nm structural information. PINE will pave the way for new sub-10nm long-term investigations of previously unexplored material, chemical and biological dynamics. © 2024 SPIE.

关键词： Probes

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Interferometric phase-intensity nanoscopy 21

Interferometric phase-intensity nanoscopy

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Plasmonics in Biology and Medicine XXI 2024

作者： Kim, Do Young Cui, Guangjie Lee, Somin Eunice Department of Electrical & Computer Engineering Biomedical Engineering Applied Physics Biointerfaces Institute Macromolecular Science & Engineering University of Michigan Ann ArborMI United States

ISBN: (纸本)9781510669796

We present a novel approach, interferometric phase intensity nanoscopy, to clearly define nanometer-scale objects situated closely together, going beyond the traditional diffraction limits. Our approach capitalizes on the strengths of interferometric scattering, which we've found remarkably effective for detecting entities as minute as individual nanoparticles and proteins. We integrated multiphase analysis with enhanced sensitivity to reveal elliptical Airy patterns that directly correlate with the nanostructures we observe. A key aspect of our methodology is the use of circular polarized illumination, which is essential for differentiating nanometer-scale objects that are closely spaced and below the diffraction limit. This technique opens up new possibilities for prolonged observation of nanoscale dynamics in biology, biomedicine, and bioengineering. © 2024 SPIE.

关键词： Diffraction

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Determination of Spherical Coordinates of Sampled Cosmic Ray Flux Distribution using Principal Components Analysis and Deep Encoder-Decoder Network

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Machine Graphics and Vision 2024年第2期33卷 29-45页

作者： Hachaj, Tomasz Piekarczyk, Marcin Bibrzycki, Lukasz Wąs, Jaroslaw Faculty of Electrical Engineering Automatics AGH University of Krakow Kraków Poland Faculty of Physics and Applied Computer Science AGH University of Krakow Kraków Poland

In this paper we propose a novel algorithm based on the use of Principal Components Analysis for the determination of spherical coordinates of sampled cosmic ray flux distribution. We have also applied a deep neural network with encoder-decoder (E-D) architecture in order to filter-off variance noises introduced by sampling. We conducted a series of experiments testing the effectiveness of our estimations. The training set consisted of 92 250 images and validation set of 37 800 images. We have calculated mean absolute error (MAE) between real values and estimations. When E-D is applied, the number of cases (estimations) where MAE © 2024 Institute of Information Technology, Warsaw University of Life Sciences - SGGW. All rights reserved.

关键词： Cosmic rays

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Automatic solar tracking system: a review pertaining to advancements and challenges in the current scenario

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Clean Energy 2024年第6期8卷 237-262页

作者： Paramjeet Singh Paliyal Surajit Mondal Samar Layek Piyush Kuchhal Jitendra Kumar Pandey Department of Electrical and Electronics Engineering School of Advanced EngineeringUPESBidholiDehradunUttarakhand 248007India Department of Physics Applied Science ClusterSchool of Advanced EngineeringUPESBidholiDehradunUttarakhand 248007India HILL(Himalayan Institute for Learning and Leadership) UPESBidholiDehradunUttarakhand 248007India

An automatic solar tracking system is an approach for optimizing the generation of solar power and modifying the angles and direction of a solar panel by considering changes in the position and path of the *** performance status of an automatic solar tracking system depends on various factors,including its design,location,and maintenance or *** solar energy from the sun that the Earth intercepts is approximately 1.8×10^(11) MW,which is thousands of times greater than the intensity at which the Earth now uses all other commercially available energy sources ***,research into automatic solar trackers is on the rise,as solar energy is abundant in nature,but its use in a highly efficient way is still *** paper provides a detailed literature review and highlights some key advancements and challenges associated with state-of-the-art automatic solar tracking *** performance of the dual-axis photovoltaic tracking system outperforms that of the stationary systems by more than 27%based on the overall system *** diverse weather conditions,the efficiency of the scheduled-based solar tracking systems was enhanced by 4.2%compared with that of the light-dependent resistor-based solar trackers.

关键词： automatic solar tracking PV system solar collectors dual-axis tracking single-axis tracking

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A Single-Phase Reactive Power Compensator with Reduced-Size Film Capacitors and Active Power Decoupling Control 8

A Single-Phase Reactive Power Compensator with Reduced-Size ...

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8th IEEE Workshop on the Electronic Grid, eGRID 2023

作者： Serban, Ioan Musona, Ronald Transilvania University of Brasov Department of Electrical Engineering and Applied Physics Brasov Romania

ISBN: (纸本)9798350327007

Enhancing the reliability of power electronic systems poses a significant challenge, prompting intensive investigation into both control and hardware solutions. To address this, the paper proposes a single-phase reactive power compensator that integrates an H-bridge inverter with reduced-size film capacitors and an active power decoupling control. The proposed compensator offers a notable advantage by eliminating the necessity of electrolytic capacitors on the inverter DC-link, achieved through the adoption of a minimalist power decoupling solution. This technique relies exclusively on durable film-type capacitors of reduced size and requires no additional power semiconductors. The proposed system's performance was assessed through simulation results. © 2023 IEEE.

关键词： Electrolytic capacitors

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Study and Design of a Teaching electrical engineering System Based on Motion Sensors Using Arduino

Study and Design of a Teaching Electrical Engineering System...

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2023 International Conference on Electromechanical and Energy Systems, SIELMEN 2023

作者： Lelutiu, Laura-Mihaela Aciu, Lia Elena Transylvania University of Brasov Department of Electrical Engineering and Applied Physics Brasov Romania

ISBN: (纸本)9798350315240

The aim of the paper is a didactic one considering this work useful for the students of Transylvania University of Brasov-Faculty of electrical engineering and Computer Sciences, the Department of electrical engineering and applied physics, at the courses electrical Measurement and Data Acquisition. The disciplines are compulsory for our second-year students from the electrical engineering program from both, the Romanian and English language study programs of BA level. We start by covering a theoretical part including the principles of using measuring motion sensors, how they work and their role, as well as basic principles regarding the use of a servomotor and of the Arduino development board. After understanding the theory and practice of using the Arduino Board we present the actual experiment where 34 students were asked to answer a questionnaire highlighting how their learning and evaluation process was affected by the used method. The students were also asked to justify and explain their answers. We believe that by designing and implementing this method and application students will be able to put into practice the acquired theoretical knowledge, therefore the study could contribute to the improvement of the educational didactic process. © 2023 IEEE.

关键词： Students

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A Comparative Performance Analysis between the Buck and Boost Differential Single-Phase Inverters with Active Power Decoupling

A Comparative Performance Analysis between the Buck and Boos...

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2023 International Aegean Conference on electrical Machines and Power Electronics and 2023 International Conference on Optimization of electrical and Electronic Equipment, ACEMP-OPTIM 2023

作者： Musona, Ronald Serban, Ioan Transilvania University of Brasov Department of Electrical Engineering and Applied Physics Brasov Romania

ISBN: (纸本)9798350311495

Differential single-phase inverters offer the advantage of achieving active power decoupling without adding additional semiconductor devices. This paper presents a comparative performance analysis of two types of differential single-phase inverters with active power decoupling: a single stage differential boost topology and a two-stage differential buck topology. The targeted applications are small photovoltaic power plants, which typically require boosting the input voltage. The aim of this research is to evaluate the two topologies in terms of voltage and current stresses and losses, under various operating conditions, and taking as reference a conventional H-bridge inverter. The analysis includes the mathematical description of each topology, which is later used to implement the control and to establish the voltage and current limits. Between the two topologies, differential boost inverters can simultaneously achieve both DC input voltage boosting as well as generate output AC voltage waveforms using a single-stage topology. This offers the advantages of a low component count and high-power density. However, it experiences higher voltage and current stresses when compared to the differential buck inverter with an additional DC-DC input boost stage. These stresses ultimately impact efficiency, and as a result, the differential buck inverter exhibits a higher efficiency compared to the differential boost inverter. © 2023 IEEE.

关键词： Topology

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A New Pulse Skipping Control for Series Resonant Converter 3

A New Pulse Skipping Control for Series Resonant Converter

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3rd IEEE Industrial Electronics Society Annual On-Line Conference, ONCON 2024

作者： Bhowmick, Supratik Chakraborty, Soham Maiti, Suman Indian Institute of Technology Kharagpur Department of Electrical Engineering Kharagpur721302 India Calcutta University UG Program of Electrical Engineering Department of Applied Physics Kolkata700009 India

ISBN: (纸本)9798331540319

This paper proposes a pulse skipping based combined frequency and duty ratio control for a series resonant converter which is targeted for voltage regulator applications. The proposed pulse skipping control combines duty ratio based phase shifted control for maintaining output voltage at its reference value, along with frequency based control which assists in development of the pulse skipping algorithm. This algorithm is structured so that pulses are skipped in generated gate pulses for upper switching devices present in the converter whenever the output voltage tries to be higher than its specified maximum value or be lower than its specified minimum value. These maximum and minimum voltages are determined based on its reference voltage and allowable voltage ripple within which the oscillations in output voltage are desired to be in. The converter system with the proposed control method is simulated in MATLAB/Simulink environment to validate its performance under transient conditions e.g., variation in load resistance and output voltage reference. The system performance with proposed method is also compared with conventional method where the proposed control demonstrates its superiority by significantly minimizing the output voltage ripple. © 2024 IEEE.

关键词： Resonant converters

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Performance Optimization of Series Resonant Converter by Combined Frequency and Duty Ratio Control 3

Performance Optimization of Series Resonant Converter by Com...

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3rd IEEE Industrial Electronics Society Annual On-Line Conference, ONCON 2024

作者： Chakraborty, Soham Bhowmick, Supratik Maiti, Suman Calcutta University UG Program of Electrical Engineering Department of Applied Physics Kolkata700009 India Indian Institute of Technology Kharagpur Department of Electrical Engineering Kharagpur721302 India

ISBN: (纸本)9798331540319

Resonant converters are widely used for voltage regulator applications. The basic converters i.e., Series resonant Converter (SRC) and Parallel Resonant Converter (PRC) are having some merits and limitations. These are addressed in multi element topologies at the cost of adding extra elements. This work takes up the SRC and reports a combined frequency and duty ratio control for performance optimization of the SRC. The key issue of SRC is that the voltage cannot be controlled at a low Q (i.e. Quality factor) operation. For example, at no load Q becomes zero making the converter inert to frequency variation. This however can be eliminated by pulse width modulation technique. Duty ratio can be properly controlled to achieve the output voltage at an extended load range. The work further takes up challenge to make efficiency optimized. For this a combined control of duty ratio and frequency are proposed. Efficiency Optimization Control (EOC) requires two voltage sensors (one at the input side and another at the output) and a current sensor. Following this, a new minimum rms current algorithm is developed that only requires a current and a voltage sensor. All the proposed techniques are simulated and verified using MATLAB/Simulink. © 2024 IEEE.

关键词： Resonant converters

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physics-Constrained Adversarial Training for Neural Networks in Stochastic Power Grids

IEEE Transactions on Artificial Intelligence

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IEEE Transactions on Artificial Intelligence 2024年第3期5卷 1121-1131页

作者： Li, Wenting Deka, Deepjyoti Wang, Ren Paternina, Mario R. Arrieta LANL Applied Mathematics and Plasmas Physics Division Los AlamosNM87544 United States Illinois Institute of Technology Department of Electrical and Computer Engineering ChicagoIL60616 United States National Autonomous University of Mexico Department of Electrical Engineering Mexico City04510 Mexico

The growth in distributed energy resources (DERs) is an important step toward solving the global climate crisis. However, many DERs, such as wind and solar power, are random and intermittent, causing the data in power grids to be perturbed with high uncertainty. Such perturbations degrade the performance of data-driven algorithms introduced in power grids for sensing and control. Existing approaches can strengthen machine learning models against well-designed malicious attacks. However, such physics-agnostic efforts fail to ensure the robustness of natural perturbations in power grids, that occur due to varying loads and changes in control inputs. This article proposes a novel physics-constrained adversarial training method for robustifying neural networks for the crucial problem of locating edge-faults in power grids. Our approach relies on first deriving analytical physical laws that are satisfied by state perturbations in realistic grids and then using the descriptive sets during adversarial training. Compared to state-of-the-art methods, our perturbation-robust neural networks have higher robust accuracy as well as training efficiency. Also, we demonstrate that the proposed approach achieves a tighter upper bound of robust risks than traditional efforts. The numerical experimental results in the IEEE 68-bus benchmark system validate our adversarial training in two scenarios when loads and control inputs vary randomly. The proposed method shows superior performance in accuracy and efficiency for different perturbed datasets. In addition, we testify the influence of different inputs on the robustness. © 2023 IEEE.

关键词： Neural networks

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