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arXiv 2025年

作者： Schreyer, W. Max Anderson, Christopher Thompson, Reid F. Computational Biology Program Oregon Health & Science University PortlandOR United States Department of Biomedical Engineering Oregon Health & Science University PortlandOR United States Portland VA Research Foundation PortlandOR United States Department of Radiation Medicine Oregon Health & Science University PortlandOR United States Department of Medical Informatics and Clinical Epidemiology Oregon Health & Science University PortlandOR United States Division of Hospital and Specialty Medicine VA Portland Healthcare System PortlandOR United States

Failure of machine learning models to generalize to new data is a core problem limiting the reliability of AI systems, partly due to the lack of simple and robust methods for comparing new data to the original training dataset. We propose a standardized approach for assessing data similarity in a model-agnostic manner by constructing a supervised autoencoder for generalizability estimation (SAGE). We compare points in a low-dimensional embedded latent space, defining empirical probability measures for k-Nearest Neighbors (kNN) distance, reconstruction of inputs and task-based performance. As proof of concept for classification tasks, we use MNIST and CIFAR-10 to demonstrate how an ensemble output probability score can separate deformed images from a mixture of typical test examples, and how this SAGE score is robust to transformations of increasing severity. As further proof of concept, we extend this approach to a regression task using non-imaging data (UCI Abalone). In all cases, we show that out-of-the-box model performance increases after SAGE score filtering, even when applied to data from the model’s own training and test datasets. Our out-of-distribution scoring method can be introduced during several steps of model construction and assessment, leading to future improvements in responsible deep learning implementation. Copyright © 2025, The Authors. All rights reserved.

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Waste reduction in production for plasma cutting process by applying the MES system 8

Waste reduction in production for plasma cutting process by ...

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8th International Conference on engineering and Emerging Technologies, ICEET 2022

作者： Pimpetch, Khwanchanok Srithorn, Jongkol School of Industrial Engineering Institute of Engineering Suranaree University of Technology System Engineering Program Nakhon Ratchasima Province Thailand

ISBN: (纸本)9781665491068

This research aims to improve the plasma cutting process to increase the efficiency of the process by applying the MES system (Manufacturing Execution systems). This study focused on increasing efficiency in the plasma cutting process for supporting future customers' needs, reducing the cost of waste in the plasma cutting process, and creating a more standardized production process. The MES system directly linked pc and PLC (programmable Logic Controller) to increase operational efficiency. The system allows auto-input of all parameters needed for the plasma cutting process through the connection. Furthermore, this system enables the robot to receive the cutting program command based on the customer's command data in the MES Server by creating conditions from the Kepware application. The experimental results show that improvement by the application of the MES system can reduce the production time by %07.55. The amount of waste caused by the plasma cutting process due to cutting errors by %100. Furthermore, it allows the company to reduce the cost of repairing time and reduce the cost of producing new parts to replace the scrap. © 2022 IEEE.

关键词： Industrial research

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Beamspace AIC & MDL Algorithm for Based on Concentric Circular Array Antenna 13

Beamspace AIC & MDL Algorithm for Based on Concentric Circul...

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Joint 13th International Conference on Soft Computing and Intelligent systems and 25th International Symposium on Advanced Intelligent systems, SCIS and ISIS 2024

作者： Park, Heui-Seon Hwang, Suk-Seung Chosun University Interdisciplinary Program in IT-Bio Convergence System Department of Electronic Engineering Gwangju Korea Republic of School of Electronic Engineering Chosun University Interdisciplinary Program in IT-Bio Convergence System Gwangju Korea Republic of

ISBN: (纸本)9798350373332

In modern wireless communication systems using multiple antenna elements, accurately identifying the signals contained in the received signal is very important. Conventional signal number estimation algorithms operate for the entire set of antenna elements, resulting in high computational complexity. In order to enhance this high computational complexity problem, this paper proposes beamspace based Akaike Information Criterion (AIC) and Minimum Description Length (MDL) algorithms based on a concentric circular array (CCA) antenna for efficient signal number estimation. In addition, computer simulation results are presented to evaluate the signal-number estimation performance of the proposed algorithm. © 2024 IEEE.

关键词： Akaike information criteria Beam space Concentric circular array antenna Minimum description length

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Structural analysis for jacket type support structure of offshore wind turbine under local environmental conditions in Taiwan 26

Structural analysis for jacket type support structure of off...

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26th Annual International Ocean and Polar engineering Conference, ISOPE 2016

作者： Lin, Chin-Yu Lin, Jia-Hong Chu, Tung-Liang Huang, Chin-Cheng Mechanical and System Engineering Program Institute of Nuclear Energy Research Taoyuan City Taiwan

ISBN: (纸本)9781880653883

This paper is to perform the structural analysis for support structure of offshore wind turbine under Taiwan's local environmental conditions such as earthquake and site specific soil properties. The analyzed support structure including tower, transition piece, jacket substructure, and pile foundation is modeled in SAP2000 for a specific offshore wind demonstration site with water depth of 30 m. The forces and moments are first calculated by the NREL FAST software which is primarily employed to analyze the dynamic responses of the entire offshore wind turbine (OWT) structure designed against severe design load cases. Subsequently, the calculated forces and moments are applied to the tower top and the limiting strengths of structural members are thus evaluated using the API RP 2A-WSD standard. In this paper, the extreme external conditions of wind, wave, sea current and 0.31g of design earthquake based on local seismic design requirement are taken into account. Also, the effects of pile-soil interaction associated with different boundary conditions of fixed end and soil springs are considered in the simulation models. The present results show that the analyzed support structure of offshore wind turbine can be fully in compliance with the requirements of API standard when taking the available local environmental conditions into account. This paper will be helpful for the safe and reliable operation of offshore wind turbine in Taiwan in the near future. © Copyright 2016 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Offshore wind turbines

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Numerical Fatigue Analysis for Jacket-type Substructure of Offshore Wind Turbines under Local Environmental Conditions in Taiwan 28

Numerical Fatigue Analysis for Jacket-type Substructure of O...

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28th International Ocean and Polar engineering Conference, ISOPE 2018

作者： Fan, Ting-Yu Lin, Chin-Yu Huang, Chin-Cheng Chu, Tung-Liang Mechanical and System Engineering Program Institute of Nuclear Energy Research Taoyuan City Taiwan

ISBN: (纸本)9781880653876

This paper is to perform a series of fatigue analyses for reference offshore wind turbine (OWT) under Taiwan local environmental conditions to investigate the potential design load cases (DLCs) which could affect the overall calculation procedure and improve the design calculation efficiency. Based on sequentially coupled approaches, NREL FAST and ANSYS software are employed to analyze the dynamic responses of offshore wind turbine system and jacket-type substructure under various DLCs defined in the international standard IEC 61400-3. The stress distributions around the intersection of tubular joints under the axial, in-plane and out-of-plane loads are computed to determine the stress concentration factors. Using conventional Rainflow counting algorithm, the cumulative fatigue damage (CFD) factors for tubular joints can be thus calculated with S-N curves and Palmgren-Miner's rule. The computed results show fatigue damage caused by power production design scenario is more dominant and accounting for the ratio of total cumulative fatigue damage up to 90%. This work with more efficient load calculation procedure (LCP) in preliminary design will be helpful for cost assessment and selection of adequate types of substructures to be utilized in future offshore wind farms in Taiwan. Copyright © 2018 by the International Society of Offshore and Polar Engineers (ISOPE)

关键词： Offshore wind turbines

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Fatigue analysis for jacket-type support structure of offshore wind turbine under local environmental conditions in Taiwan 27

Fatigue analysis for jacket-type support structure of offsho...

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27th International Ocean and Polar engineering Conference, ISOPE 2017

作者： Fan, Ting-Yu Huang, Chin-Cheng Chu, Tung-Liang Mechanical and System Engineering Program Institute of Nuclear Energy Research Taoyuan City Taiwan

ISBN: (纸本)9781880653975

This paper is to perform fatigue analysis of the jacket-type support structure for NREL 5MW reference offshore wind turbine (OWT). As a successive work to the preceding support structure design of the NREL 5MW offshore wind turbine subjected to Taiwan local environments, this paper presents a practical and efficient approach for fatigue analysis of the jacket-type support structure under wind, wave loads and their combinations. The effects of wind directions on high cycle fatigue of the jacket-type support structure are also taken into account in this work. Using the separate global and local analyses, the NREL FAST software is first employed to analyze the dynamic response of integrated offshore wind turbine and support structure under various design load cases defined in the GL guidelines. The obtained shear forces, axial forces and bending moments at tower top are then used to perform subsequent local analysis of fatigue in time domain with ANSYS software. Using Rainflow counting algorithm, stress amplitudes and corresponding numbers of cycles can be further obtained. The cumulative fatigue damage factors can be thus calculated with S-N curves and Palmgren-Miner's rule. The computed results show higher fatigue damage factors at some locations near tower top and bottom of the jacket-type support structure, and it is also found that wind load is more dominant. Further, the effects of wave loads and the combination of wave and wind loads are also noted. Accounting for the local environments in Taiwan, the engineering study on fatigue analysis will be helpful to ensure the long term operation safety of offshore wind turbine and support structures in the future. Copyright © 2017 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Offshore wind turbines

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Dynamic load analysis for offshore wind turbine with flexible bottom condition under earthquake loading 26

Dynamic load analysis for offshore wind turbine with flexibl...

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26th Annual International Ocean and Polar engineering Conference, ISOPE 2016

作者： Lai, Wen-Jeng Su, Wei-Nian Huang, Chin-Cheng Mechanical and System Engineering Program Institute of Nuclear Energy Research Taoyuan City Taiwan

ISBN: (纸本)9781880653883

Some offshore wind turbines might be constructed in seismically active regions, the impact of earthquake loading on design and operation of offshore wind turbines has to be taken into consideration. Site-specific environmental conditions such as earthquake and soil are crucial for the performance and structural integrity of offshore wind turbines. This work is to present dynamic load analyses for the NREL 5MW reference offshore wind turbine with monopile support structure subjected to earthquake loadings. The horizontal earthquake loadings are applied to the reference offshore wind turbine at different operation conditions. The FAST code is chosen as the analysis tool and is further recompiled to study the earthquake and soil effects. The computed results show the importance of flexibility of support structure bottom on the optimization of offshore wind turbine and support structure design. The dynamic load analyses performed in this study will provide the insights into the local offshore wind turbine and support structure design. © Copyright 2016 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Dynamic loads

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Project SEXTANT 29

Project SEXTANT

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29th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2016

作者： Villahermosa, Randy Haddad, Ranwa Research and Program Development Office United States GPS System Engineering United States

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A comparative study of the API and NORSOK standards apply to design analysis for an offshore wind turbine with jacket support structure 25

A comparative study of the API and NORSOK standards apply to...

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25th International Ocean and Polar engineering Conference, ISOPE 2015

作者： Lin, C.Y. Huang, C.C. Wu, T.Y. Institute of Nuclear Energy Research Mechanical and System Engineering Program Taoyuan City Taiwan

ISBN: (纸本)9781880653890

This paper is to perform the Jacket support structure design analysis for a 5MW reference offshore wind turbine of IEA OC4 project using API RP 2A-WSD and NORSOK N-004 design standards. The analysis is conducted by a global-local structural analysis scheme. In global analysis, the NREL FAST code is employed to analyze the dynamic responses of entire OWT structure under severe design load cases of IEC 61400-3. The tower base forces and moments are thus calculated and then used as the input of SAP2000 to conduct the Jacket support structural analysis, and then the member and joint strength checks are performed using the API and NORSOK standards, respectively. Totally 9 severe design load cases are considered in this work. The results show that the analyzed Jacket structure is fully in compliance with the requirements of API and NORSOK standards. In addition, it reveals that the NORSOK standard provides slightly more safety margin than API. Copyright © 2015 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Offshore wind turbines

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Measurement of surface stress-strain distribution inside a grain of carbon steel via optical microscope

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Measurement 2025年 255卷

作者： I Dewa Made Oka Dharmawan Jinyi Lee Department of Control Instrumentation and Robot Engineering Graduate School of Chosun University Gwangju 61452 Republic of Korea Interdisciplinary Program in IT-BIO Convergence System Chosun University Gwangju 61452 Republic of Korea Department of Electronic Engineering Chosun University Gwangju 61452 Republic of Korea

The advancement of alloys and steel in engineering highlights the critical need for robust methods to ensure structural integrity. While traditional Non-Destructive Testing and Evaluation (NDT/E) techniques provide valuable insights, they often fail to detect pre-existing stress conditions that contribute to fatigue cracks. Recent approaches have addressed this limitation by analyzing stress and strain at the grain level using advanced measurement systems—often based on diffraction techniques—integrated with Finite Element Method (FEM) and Digital Image Correlation (DIC) platforms. However, the application of these techniques for in-service inspections remains limited by challenges in accessibility, cost, and scalability. To overcome these issues, an integrated 2D surface system combining optical microscopy with DIC and grain-level analysis within the FEM framework is proposed. This method enables efficient visualization of grain-level deformation and stress distribution, thereby providing deeper insights into the microstructural behavior of polycrystalline materials under external loads. The proposed methodology is theoretically outlined and validated through simulations and experimental analyses, demonstrating its potential as a practical solution for in-service inspections. Ultimately, this approach is expected to advance inspection techniques by offering an accessible and scalable tool for monitoring microstructural behavior and identifying potential failure mechanisms through surface analysis.

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