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30th International Symposium on Semiconductor Manufacturing, ISSM 2024

作者： Moriya, Kento Watanabe, Daiki Ogawa, Taiki Yamaguchi, Tomohiro Aikawa, Shinya Kogakuin University Electrical and Electronic Engineering Program Tokyo Japan Kogakuin University Dept. of Electrical and Electronic Engineering Tokyo Japan Kogakuin University Dept. of Applied Physics Tokyo Japan

ISBN: (纸本)9798331510589

SnSO4 has a layered structure and is a promising candidate as a p-type transparent semiconductor with a band gap of 3.9 eV and hole effective mass of 0.88, theoretically. However, there has been no report on experimental fabrication of the semiconductor thin films. Here, we attempt trying fabrication of SnSO4 thin films and investigating their electrical properties to clarify the possibility of SnSO4 thin films as p-type transparent semiconductors. © 2024 IEEE.

关键词： Layered semiconductors

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Adaptive Fault Detection Based on Neural Networks and Multiple Sampling Points for Distribution Networks and Microgrids

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Journal of Modern Power Systems and Clean Energy 2022年第6期10卷 1648-1657页

作者： J.Marín-Quintero C.Orozco-Henao A.S.Bretas J.C.Velez A.Herrada A.Barranco-Carlos W.S.Percybrooks Electric and Electronic Engineering Program Universidad Tecnológica de BolívarCartagenaColombia Electrical and Electronic Engineering Department Universidad del NorteBarranquillaColombia Distributed Systems Group Pacific Northwest National LaboratoryGainesvilleUSA

Smart networks such as active distribution network(ADN)and microgrid(MG)play an important role in power system *** design and implementation of appropriate protection systems for MG and ADN must be addressed,which imposes new technical *** paper presents the implementation and validation aspects of an adaptive fault detection strategy based on neural networks(NNs)and multiple sampling points for ADN and *** solution is implemented on an edge *** are used to derive a data-driven model that uses only local measurements to detect fault states of the network without the need for communication *** sampling points are used to derive a data-driven model,which allows the generalization considering the implementation in physical *** adaptive fault detector model is implemented on a Jetson Nano system,which is a single-board computer(SBC)with a small graphic processing unit(GPU)intended to run machine learning loads at the *** proposed method is tested in a physical,real-life,low-voltage network located at Universidad del Norte,*** testing network is based on the IEEE 13-node test feeder scaled down to 220 *** validation in a simulation environment shows the accuracy and dependability above 99.6%,while the real-time tests show the accuracy and dependability of 95.5%and 100%,*** hard-to-derive parameters,the easy-to-implement embedded model highlights the potential for real-life applications.

关键词： Distribution network microgrid adaptive protection intelligent electronic device machine learning

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Visualization of Methamphetamine-Contaminated Fingermarks on Glass Surfaces by Field Emission Scanning Electron Microscope for Forensic Investigation

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Journal of Forensic Science and Medicine 2023年第1期9卷 6-11页

作者： Sarah Aliah Amir Sarifudin Kah Haw Chang Bee Ee Khoo Ahmad Fahmi Lim Abdullah Forensic Science Program School of Health SciencesHealth CampusUniversiti Sains MalaysiaKelantanMalaysia Mechatronic Engineering Program School of Electrical and Electronic EngineeringEngineering CampusUniversiti Sains MalaysiaPenangMalaysia

Background:Fingermark is an individual’s primary identification *** is helpful in determining individuals involved in illegal activities and is frequently encountered in clandestine *** forensic investigation,the critical question to be answered is whether a fingermark was left on a surface before or after the initiation of an unlawful *** and Objectives:This study aimed to investigate the visualization of methamphetamine-contaminated fingermarks on glass surfaces and estimate the immediacy of their *** and Methods:In this study,the prior-deposition contaminated fingermarks,i.e.,fingermarks deposited a surface priorly contaminated by methamphetamine,and the postdeposition contaminated fingermarks,i.e.,fingermarks deposited on a clean surface but subsequently contaminated with methamphetamine were visualized and compared using Field Emission Scanning Electron Microscope(FESEM).Results:Under FESEM,the latent fingermarks and the crystalline structure of methamphetamine were clearly *** postdeposition contaminated fingermarks appeared in smudge conditions in all the three replicate samples,where the ridge and nonridge areas could not be *** the contrary,the prior-deposition contaminated fingermark demonstrated distinct separations between ridges and ***,the application of fingerprint powders reduced the possibility to determine the immediacy of ***:To conclude,both prior-deposition contaminated fingermarks and postdeposition contaminated fingermarks can be discriminated,providing information on the instance when a fingermark was left on a surface.

关键词： Fingermark methamphetamine scanning electron microscope visualization powder

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Unveiling the size effect of nitrogen-doped carbon-supported copper-based catalysts on nitrate-to-ammonia electroreduction

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Nano Research 2024年第4期17卷 2438-2443页

作者： Ran Li Taotao Gao Wenxi Qiu Minghao Xie Zhaoyu Jin Panpan Li College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Institute for Advanced Study Chengdu UniversityChengdu 610106China Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at AustinAustinTexas 78712USA Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

The electrocatalytic nitrate reduction reaction(NitRR)represents a promising approach toward achieving economically and environmentally sustainable ***,it remains a challenge to regulate the size effect of electrocatalysts to optimize the catalytic activity and ammonia ***,the Cu-based catalysts were tailored at the atomic level to exhibit a size gradient ranging from single-atom catalysts(SACs,0.15–0.35 nm)to single-cluster catalysts(SCCs,1.0–2.8 nm)and nanoparticles(NPs,20–30 nm),with the aim of studying the size effect for the NO_(3)^(-)-to-NH_(3) reduction ***,the Cu SCCs exhibit enhanced metal–substrate and metal–metal interactions by taking advantageous features of Cu SACs and Cu ***,Cu SCCs achieve exceptional electrocatalytic performance for the NitRR with a maximum Faradaic efficiency of ca.96%NH_(3)and the largest yield rate of ca.1.99 mg·h^(-1)·cm^(-2) at-0.5 V *** hydrogen electrode(RHE).The theoretical calculation further reveals the size effect and coordination environment on the high catalytic activity and selectivity for the *** work provides a promising various size-controlled design strategy for aerogel-based catalysts effectively applied in various electrocatalytic reactions.

关键词： nitrate electroreduction ammonia electrosynthesis size effect single-cluster catalyst

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Accuracy-, Delay- and Area-Driven Evaluation of Lower-Part Approximate Parallel Prefix Adder 30

Accuracy-, Delay- and Area-Driven Evaluation of Lower-Part A...

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30th IEEE International Conference on electronics, Circuits and Systems, ICECS 2023

作者： Rosa, Morgana M. A. Costa, Eduardo Soares, Rafael Bampi, Sergio Pelotas Brazil Graduate Program on Electronic Engineering and Computing Pelotas Brazil Porto Alegre Brazil

ISBN: (纸本)9798350326499

This work proposes an accuracy-driven evaluation model of an approximate adder (AxA) called an approximate parallel prefix adder (AxPPA). It explores the significance of approximate computing (AxC) in optimizing performance and energy efficiency in computer systems by accepting minor accuracy trade-offs. We examine the AxPPA through a meticulous error analysis model and an automated analysis framework that comprehensively evaluates area and delay based on the fundamental equations of parallel prefix adders (PPAs). Additionally, it emphasizes the importance of lower-part approximation in adders, effectively addressing the elongation of carry chains and enhancing overall efficiency. The choice of approximation method directly impacts computational accuracy, resulting in variations in the number of approximated bits and carry chain length for a given tolerance level. Conducting a thorough comparison of accuracy trade-offs requires a unique design and simulation for each unit and approximation level, which can be time-consuming, particularly in larger circuits. Therefore, the proposed approach facilitates the exploration of larger circuit design space encompassing multiple AxAs, significantly minimizing time investment. In our experiments, the accuracy-driven evaluation of the lower part approximation method in AxA took 71.268 milliseconds for 1 million random inputs, with a K -bits approximation ranging from 1 to 16. The results indicate that AxPPA exhibits a minor error magnitude among the explored literature AxAs, being approximately 50.97% more accurate on average. © 2023 IEEE.

关键词： Adders

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Performance Evaluation of KNIME Low Code Platform in Deep Learning Study and Optimal Hyperparameter Tuning

Performance Evaluation of KNIME Low Code Platform in Deep Le...

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2024 IEEE Region 10 Conference, TENCON 2024

作者： Thongkhome, Pornpawee Yonezawa, Takuro Kawaguchi, Nobuo G30 International Program in Electrical Electronic and Information Engineering School of Engineering Nagoya University Aichi Japan Graduate School of Engineering Nagoya University Aichi Japan

ISBN: (纸本)9798350350821

A low-code platform is a software development environment that allows for the creation of applications through graphical user interfaces and configuration instead of traditional hand-coded computer programming. In this study, the application to classify a dataset of traffic sign images using the KNIME low-code deep learning development platform will be discussed to represents this software performance especial in term of model optimization processes. By creates the workflow to perform image preprocessing, create the CNN layer under KERAS sequential API and finding the best set of key hyperparameters among traditional KNIME build-in optimization algorithm including Brute force, Hill climbing, random search, Bayesian Optimization and black-box optimizer Optuna optimization algorithm under 3 types CNN architecture as simple CNN, Resnet-50 and VGG16 to classify traffic sign images. The result demonstrates that both grid search and random search optimization can be effective, while both Optuna and Bayesian optimization stands out as a powerful method due to its ability to efficiently explore the hyperparameter space and achieve superior results to meet 99% accuracy under simple CNN environment, but Optuna is significantly improve optimization times than Bayesian about 7 - 8 times. The KNIME low-code platform provides a user-friendly environment for developing and fine-tuning models to contribute the ongoing progress in machine learning and deep learning research development. © 2024 IEEE.

关键词： Graphical user interfaces

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TaxDiff: taxonomic-guided diffusion model for protein sequence generation

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Science China(Information Sciences) 2025年第4期68卷 385-386页

作者： Zongying LIN Hao LI Liuzhenghao LV Yu WANG Bin LIN Junwu ZHANG Zijun CHEN Calvin Yu-Chian CHEN Li YUAN Yonghong TIAN School of Electronic and Computer Engineering Peking University AI for Science (AI4S)-Preferred Program Peking University Shenzhen Graduate School Peng Cheng Laboratory School of Chemical Biology and Biotechnology Peking University

Protein design aims to generate protein variants with targeted biological functions, which is significant in multiple biological areas, including enzyme reaction catalysis, vaccine design, and fluorescence intensity. Protein design contains two paradigms: sequence generation and structure generation. Recently, EvoDiff [1] proposed a universal designing paradigm, combining structure and sequence generation using the diffusion framework, which improves the protein design efficiency.

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Battery Energy Storage System Supporting Frequency Regulation of Power System with High Renewable Penetration 13

Battery Energy Storage System Supporting Frequency Regulatio...

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13th International Conference on Power, Energy and Electrical engineering, CPEEE 2023

作者： Nzimande, Nomvelo Noro, Yasuhiro Kogakuin University Electrical Engineering and Electronics Program Tokyo Japan Kogakuin University Department of Electrical and Electronic Engineering Tokyo Japan

ISBN: (纸本)9781665490146

The utilization of renewable energy (RE) has increased worldwide because it is one of the effective ways to minimize greenhouse gases. The power outputs of photovoltaic (PV) and wind farms depend on weather conditions. High penetration of intermittent renewable energy (IRE) will put pressure on frequency regulation, and frequency fluctuation will increase because IRE does not participate in frequency regulation. This study evaluated the role of battery energy storage systems (BESS) in the frequency regulation of a grid with large-scale IRE. The simulations were conducted in the MATLAB-Simulink environment, taking into consideration the operating conditions of the Republic of South Africa (RSA) power system, such as frequency deviation limits. Eskom's (the RSA utility company) policy requires its operators to keep the system frequency between 49.85 Hz and 50.15 Hz 95% of the time. The BESS was integrated into the load frequency control (LFC) model to assist with frequency regulation and maintain the frequency between 49.85 Hz and 50.15 Hz. © 2023 IEEE.

关键词： Battery storage

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PV and Battery Sizing and Cost Study for Small Remote Islands Considering Load Demand Peak Shift 13

PV and Battery Sizing and Cost Study for Small Remote Island...

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13th International Conference on Power, Energy and Electrical engineering, CPEEE 2023

作者： Kitalong, Clarence Noro, Yasuhiro Electrical Engineering and Electronics Program Kogakuin University Tokyo Japan Kogakuin University Department of Electrical and Electronic Engineering Tokyo Japan

ISBN: (纸本)9781665490146

This paper discusses energy and cost comparison for 9 different combinations of Photovoltaic (PV) and Lithium-Ion Battery Energy Storage System (BESS) sizes with load demand peak changes for the Kayangel Power System (KPS). 9 PV and BESS combinations were modeled with the existing 90kW Diesel Generator (DG) and simulated while analyzing the kWh energy values of DG operation, PV curtailment and battery power flow energy values. A comparative cost analysis was then conducted on these 3 energies using Installation Costs (IC), diesel fuel costs and energy charge costs. Following this, the study was expanded to a 20-year time period for more complete system lifetime cost estimations. Simulated energy losses and system costs showed mostly favorable values during increased PV and BESS sizes and shifted load demand peak. Simulation results also identified combinations where increased sizing and shifted load demand peak made little difference. © 2023 IEEE.

关键词： Energy dissipation

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A Location Estimation Algorithm Combined with TDOA and TOA Considering Repeaters 14

A Location Estimation Algorithm Combined with TDOA and TOA C...

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14th International Conference on Ubiquitous and Future Networks, ICUFN 2023

作者： Jeon, Seul-Bi Park, Heui-Seon Jo, Tae-Ho Hwang, Suk-Seung Chosun University Interdisciplinary Program in IT-Bio Convergence System Department of Electronic Engineering Gwangju Korea Republic of

ISBN: (纸本)9798350335385

Location Detection Technology (LDT), which accurately estimates the location of a mobile station (MS), is one of core techniques for the modern communication system. Among various LDTs, Time of arrival (TOA) and Time Difference of Arrival (TDOA) are the most commonly employed method, which calculates the location of MS based on at least three signals from base stations (BSs). In the urban environment, many repeaters have been installed for overcoming the radio shadow area problem of a receiver, but they cause the serious errors of the location estimation when we utilize signals passed through repeaters. In order to enhance this problem, in this paper, we introduce the combined location estimation approach with TDOA and TOA considering the repeater, based on signals from two repeaters and one BS. © 2023 IEEE.

关键词： Time difference of arrival

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