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A Performance Optimization of Quantum Computing Simulation using FPGA 19

A Performance Optimization of Quantum Computing Simulation u...

19th International Conference on Electrical engineering/Electronics, computer, Telecommunications and Information Technology, ECTI-CON 2022

作者： Jungjarassub, Yaninee Piromsopa, Krerk Chulalongkorn University Computer Science Program Department of Computer Engineering Faculty of Engineering Bangkok Thailand

ISBN: (纸本)9781665485845

We use FPGA to optimize the simulation of quantum computing in two aspects. (a) The if-else state is used in place of tensor product calculation. This allows the tensor product of each quantum operator to be generated in a single clock cycle. (b) The pre-calculated lookup ROM is used for estimating the sine and cosine values. This facilitates the computation of quantum gates that are related to angle. To validate our work, we implement our design in VerilogHDL. The performance is evaluated using an FPGA simulator. The result shows a dramatic improvement in the simulation process comparing to those of simulation on classical computers. © 2022 IEEE.

关键词： Field programmable gate arrays (FPGA)

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Rumination as a within-person indirect pathway between daily negative life events and suicidal ideation in recently hospitalized adults

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Journal of Psychiatric Research 2025年 188卷 153-161页

作者： Gemma T. Wallace Melanie L. Bozzay Leslie A. Brick Ivan W. Miller Emily Mower Provost Heather T. Schatten Department of Psychiatry and Human Behavior Alpert Medical School of Brown University 700 Butler Drive Providence RI 02906 United States Psychosocial Research Program Butler Hospital 345 Blackstone Blvd Providence RI 02906 United States The Ohio State University Wexner Medical Center 1960 Kenny Rd. Columbus OH 43215 United States Computer Science and Engineering University of Michigan 2260 Hayward St. Ann Arbor MI 48109 United States

Negative life events are often implicated as a near-term risk factor for suicidal ideation (SI); however ruminative processes may play a critical role in amplifying the distress following experiences of negative life events, ultimately leading to greater suicide risk. In the present work, we examined whether rumination indirectly impacted the association between negative events and SI intensity in a day-level ecological momentary assessment (EMA) study. Participants ( N = 107; M age = 35.9 years, 65% female, 81% white) completed an EMA protocol for 65 days following psychiatric hospitalization. We used dynamic structural equation modeling to test a day-level, within-persons model of direct and indirect effects between negative events, rumination, and SI intensity. After fitting the model across all people, we derived person-specific estimates to examine heterogeneity in the model parameters (i.e., while the indirect effect may be significant in the full sample, effect sizes may vary across individuals). Results indicated that the indirect effect of rumination was significant in the full sample (unstandardized estimate = 0.026) and represented 38.058% of the total effect. Moreover, results for the person-specific examination indicated that the indirect effect was present for nearly all participants who reported SI at any point in their EMA data. Thus, in addition to highlighting the critical role that rumination can play in SI, this study also highlights the value in conducting person-specific research to understand the complexity and heterogeneity of psychological processes involved in suicide risk.

关键词： Suicidal ideation Rumination Stressful event Psychiatric inpatient Ecological momentary assessment Post-discharge Heterogeneity

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Nonsaturated large magnetoresistance and transport dynamics in a n-doped cryogenic WSe2 field-effect device

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Physical Review B 2025年第12期111卷 125307-125307页

作者： Wei-Chen Lin Ching-Chen Yeh Jia-Zhu Zou Nhat Anh Nguyen Phan Inayat Uddin Hai Yen Le Thi Kenji Watanabe Takashi Taniguchi Gil-Ho Kim Department of Engineering and System Science National Tsing Hua University Hsinchu 300 Taiwan Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan Department of Physics National Taiwan University Taipei 106 Taiwan Department of Electrical and Computer Engineering Sungkyunkwan University (SKKU) Suwon 164 Republic of Korea Sungkyunkwan Advanced Institute of Nano Technology (SAINT) Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea Research Center for Electronic and Optical Materials National Institute for Materials Science 1-1 Namiki Tsukuba 305-0044 Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science 1-1 Namiki Tsukuba 305-0044 Japan

Interest in the two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDs) continues to intensify, driven by their suitable band gaps to supplant silicon as next-generation semiconductor materials. Among various TMDs, tungsten diselenide (WSe2) is renowned for its superior electrical properties in carrier density and mobility under ambient conditions. Despite its notable attributes, the behavior of monolayer WSe2 in the electron-doped regime under cryogenic conditions remains largely uncharted, particularly concerning its magnetotransport properties. In this study, we reveal the transport mechanisms of monolayer WSe2 from high temperatures down to the cryogenic regime. As evident by Efros–Shklovskii variable-range hopping (E-S VRH) in the cryogenic regime, strong Coulomb interactions arise between electrons. Above 8 K, an uncommon nonsaturated quadratic large magnetoresistance (MR) can be explained by the wave-function shrinkage model, which is consistent with the E-S VRH transport mechanism. Notably, the nonsaturated quadratic large MR shows a magnitude up to 1740% at 13 T. These findings underscore the potential applications for monolayer WSe2 in cryogenic field-effect devices, magnetic sensors, and memory devices and mark a significant advance in magnetotransport research.

关键词： Monolayers

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ON DECOMPOSITION-THEORY - DUALITY

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IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS 1983年第2期13卷 215-221页

作者： NAYLOR, AW Graduate Program in Computer Information and Control Engineering and theDepartment of Electrical and Computer Engineering University of Michigan Ann Arbor MI USA Industrial Technology Institute Ann Arbor MI USA

Decomposition theory is concerned with the structures that arise in the decomposition of systems. It states from the premise that any method of system decomposition is based, either explicitly or implicitly, on some concept of dependence. The formal setting of decomposition theory is the dependence, an ordered-triple ( E , M , D ), where E is a nonempty set, M is a collection of subsets of E , and D is a relation from nonempty subsets of M to subsets of M . If ( A , B )∈ D , it is said that ` A depends on B '. Duality is considered here. In particular, given a dependence ( E , M , D ), its dual is a dependence ( E , M , D '). Duality plays a role here similar to duality in other formal systems such as graphs, matroids, lattices, circuits, control systems, and so forth. It deepens our understanding of dependence by pairing seemingly different concepts.

关键词： Bismuth Cybernetics computers Random variables Lattices Control systems Missiles

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Moisture-driven phase transition for improved perovskite solar cells with reduced trap-state density

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Nano Research 2017年第4期10卷 1413-1422页

作者： Swaminathan Venkatesan Fang Hao Junyoung Kim Yaoguang Rong Zhuan Zhu Yanliang Liang Jiming Bao Yan Yao Department of Electrical and Computer Engineering and Materials Science and Engineering Program University of Houston Houston Texas 77204 USA Texas Center for Superconductivity at the University of Houston Houston Texas 77204 USA

We report a mechanistic understanding of a moisture-driven intermediate-phase transition that improves the quality of perovskite thin films based on a lead-acetate precursor, improving the power-conversion effidency. We clarify the composition of the intermediate phase and attribute the transition of this phase to the hygroscopic nature of the organic product, i.e., methylammonium acetate. Thermal annealing aids in the coarsening of the grains. These decoupled processes result in better crystal formation with a lower spatial and energetic distribution of traps. Thermal annealing of the films without exposure to air results in a faster intermediate-phase transition and grain coarsening, which occur simultaneously, leading to disorder in the films and a higher deep trap-state density. Our results indicate the need for a humid environment for the growth of high-quality perovskite films and provide insight into intermediate-phase dissociation and conversion kinetics. Thus, they are useful for the large-scale production of effident solution-processed perovskite solar cells.

关键词： perovskite solar cells phase transition moisture treatment film growth

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OPRLM: A Web Tool and a Database for Positioning and Simulations of Proteins in Realistic Lipid Membranes

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Journal of Molecular Biology 2025年 168966页

作者： Park, Sang-Jun Schnitzer, Kyle A. Kovalenko, Alexey Cherepanov, Stanislav Patro, L. Ponoop Prasad Song, Zigang Pogozheva, Irina D. Lomize, Andrei L. Im, Wonpil Department of Computer Science and Engineering Lehigh University 111 Research Drive Bethlehem 18015 PA United States Department of Electrical Engineering and Computer Science College of Engineering University of Michigan 1221 Beal Ave Ann Arbor 48109-2102 MI United States Department of Computer Science College of Literature Science and the Arts University of Michigan 2260 Hayward Street Ann Arbor 48109-2121 MI United States Biophysics Program University of Michigan 930 N. University Avenue Ann Arbor 48109-1065 MI United States Department of Biological Sciences Lehigh University 111 Research Drive Bethlehem 18015 PA United States Department of Medicinal Chemistry College of Pharmacy University of Michigan 428 Church St. Ann Arbor 48109-1065 MI United States

Molecular dynamics (MD) simulations in explicit lipid bilayers enable modeling of protein-lipid interactions essential for membrane protein functions and regulation. The newly developed computational web tool, OPRLM (Orientations of Proteins in Realistic Lipid Membranes), automates the assembly of membrane protein structures with explicit lipids corresponding to 18 biological membrane types with symmetric or asymmetric lipid distributions, as well as 5 types of two-component lipid bilayers with varying cholesterol content. Built upon the CHARMM-GUI toolset and the PPM method, OPRLM simplifies the setup of complex simulation system involving integral and/or peripheral membrane proteins with explicit lipid mixtures and generates all necessary files for subsequent all-atom MD simulations. OPRLM has successfully generated protein-membrane systems for 286 tested protein structures in various biomembranes, including 138 structures containing ligands. The OPRLM database, an advanced successor of the OPM database, includes explicit protein-lipid systems for tested proteins in their native biomembranes. It provides coordinates of integral and peripheral membrane proteins from the Protein Data Bank embedded in planar or curved implicit lipid bilayers. Additionally, it includes the classification of proteins into types, superfamilies, and families, along with the information on intracellular localizations and membrane topology and visualization options. The OPRLM web tool and the database are publicly accessible at https://***. © 2025 The Authors

关键词： biomembrane explicit lipid lipid bilayer peripheral membrane protein transmembrane

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Computational design of serine hydrolases

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Science (New York, N.Y.) 2025年第6744期388卷 eadu2454页

作者： Lauko, Anna Pellock, Samuel J. Sumida, Kiera H. Anishchenko, Ivan Juergens, David Ahern, Woody Jeung, Jihun Shida, Alexander F. Hunt, Andrew Kalvet, Indrek Norn, Christoffer Humphreys, Ian R. Jamieson, Cooper Krishna, Rohith Kipnis, Yakov Kang, Alex Brackenbrough, Evans Bera, Asim K. Sankaran, Banumathi Houk, K.N. Baker, David Department of Biochemistry University of Washington Seattle WA United States Institute for Protein Design University of Washington Seattle WA United States Graduate Program in Biological Physics Structure and Design University of Washington Seattle WA United States Department of Chemistry University of Washington Seattle WA United States Graduate Program in Molecular Engineering University of Washington Seattle WA United States Paul G. Allen School of Computer Science and Engineering University of Washington Seattle WA United States Medical Scientist Training Program University of Washington Seattle WA United States Howard Hughes Medical Institute University of Washington Seattle WA United States Department of Chemistry and Biochemistry University of California Los Angeles CA United States

The design of enzymes with complex active sites that mediate multistep reactions remains an outstanding challenge. With serine hydrolases as a model system, we combined the generative capabilities of RFdiffusion with an ensemble generation method for assessing active site preorganization at each step in the reaction to design enzymes starting from minimal active site descriptions. Experimental characterization revealed catalytic efficiencies (kcat/Km) up to 2.2 × 105 M-1 s-1 and crystal structures that closely match the design models (Cα root mean square deviations <1 angstrom). Selection for structural compatibility across the reaction coordinate enabled identification of new catalysts remove with five different folds distinct from those of natural serine hydrolases. Our de novo approach provides insight into the geometric basis of catalysis and a roadmap for designing enzymes that catalyze multistep transformations.

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HARMONIC CHARACTERISTICS AND IMPACT OF UTILITY-INTERACTIVE PHOTOVOLTAIC PROTOTYPES ON THE NUSU DISTRIBUTION FEEDER

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IEEE TRANSACTIONS ON POWER DELIVERY 1986年第2期1卷 121-128页

作者： RANADE, SJ Electric Utility Management Program Department of Electrical and Computer Engineering New Mexico State University Las Cruces NM USA

Nonsimultaneous measurements of voltage and current harmonics associated with the distribution and utility-interactive photovoltaic systems at the Southwest Residential Experiment Station are summarized in this paper. A qualitative analysis of the data is presented. The harmonic impacts of the prototypes-on the distribution system appear to be minimal. Needs in the area of measurement and analysis of harmonic propagation in general systems are identified.

关键词： Photovoltaic systems Solar power generation Prototypes Power harmonic filters Power system harmonics Voltage Data analysis Harmonic analysis Large-scale systems Economies of scale

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Convolutional Neural Network Classification of Coleoptera through Keras and TensorFlow 24

Convolutional Neural Network Classification of Coleoptera th...

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10th International Conference on Computing and Artificial Intelligence, ICCAI 2024

作者： Angelia, Randy Echavez Torres, John Louie B. Cagadas, Cristelle Ann G. Manigo, Annalee Computer Engineering Program College of Engineering Education University of Mindanao Philippines

ISBN: (纸本)9798400717055

An application was developed to address the time-consuming and subjective nature of physical examination and human judgment to classify the diverse families of Coleoptera more efficiently. Specifically focusing on the Coleoptera families in the Philippines, the application utilizes a Convolutional Neural Network (CNN)-based model as its classification architecture. To enhance the accuracy of the CNN model, researchers gathered images of Coleoptera from various families. The program achieves an impressive 94.44% accuracy rate and has demonstrated successful results in classifying Coleoptera families. This application offers a more streamlined and reliable approach to Coleoptera classification, benefiting researchers and enthusiasts. © 2024 ACM.

关键词： Convolutional neural networks

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PacECG-Net: A Multi-modal Approach Integrating LLMs and ECG for LVSD Classification in Pacemaker Patients 25

PacECG-Net: A Multi-modal Approach Integrating LLMs and ECG ...

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Proceedings of the 40th ACM/SIGAPP Symposium on Applied Computing

作者： Wonkyeong Shim Namjun Park Donggeun Ko San Kim Hye Bin Gwag Young Jun Park Seung-Jung Park Jaekwang Kim Department of Computer Science and Engineering Sungkyunkwan University Suwon Republic of Korea Aim Future AI Seoul Republic of Korea Sungkyunkwan University Suwon Republic of Korea Samsung Changwon Hospital Changwon Republic of Korea Wonju Severance Christian Hospital Wonju Republic of Korea Samsung Medical Center Seoul Republic of Korea School of Convergence / Convergence Program for Social Innovation Sungkyunkwan University Seoul Republic of Korea

ISBN: (纸本)9798400706295

This study presents an AI-based model using ECG signals to predict left ventricular systolic dysfunction (LVSD) in pacemaker patients. A 1D convolutional neural network (CNN) combined with large language models processed both sequential ECG data and nonsequential clinical metadata. The model achieved an AUROC of 0.97 on both general and pacemaker-specific datasets, demonstrating its high accuracy. This approach offers a fast, cost-effective alternative to traditional echocardiography, improving LVSD detection in patients with pacemakers.

关键词： pacemaker

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