Industrial Metrology最新文献_第3页

Global Sensitivity Analysis and Uncertainty Quantification for Simulated Atrial Electrocardiograms 模拟心房心电图的全局敏感性分析和不确定性量化

Industrial Metrology Pub Date : 2022-12-26 DOI: 10.3390/metrology3010001

Benjamin Winkler, C. Nagel, N. Farchmin, S. Heidenreich, A. Loewe, O. Dössel, M. Bär

{"title":"Global Sensitivity Analysis and Uncertainty Quantification for Simulated Atrial Electrocardiograms","authors":"Benjamin Winkler, C. Nagel, N. Farchmin, S. Heidenreich, A. Loewe, O. Dössel, M. Bär","doi":"10.3390/metrology3010001","DOIUrl":"https://doi.org/10.3390/metrology3010001","url":null,"abstract":"The numerical modeling of cardiac electrophysiology has reached a mature and advanced state that allows for quantitative modeling of many clinically relevant processes. As a result, complex computational tasks such as the creation of a variety of electrocardiograms (ECGs) from virtual cohorts of models representing biological variation are within reach. This requires a correct representation of the variability of a population by suitable distributions of a number of input parameters. Hence, the assessment of the dependence and variation of model outputs by sensitivity analysis and uncertainty quantification become crucial. Since the standard metrological approach of using Monte–Carlo simulations is computationally prohibitive, we use a nonintrusive polynomial chaos-based approximation of the forward model used for obtaining the atrial contribution to a realistic electrocardiogram. The surrogate increases the speed of computations for varying parameters by orders of magnitude and thereby greatly enhances the versatility of uncertainty quantification. It further allows for the quantification of parameter influences via Sobol indices for the time series of 12 lead ECGs and provides bounds for the accuracy of the obtained sensitivities derived from an estimation of the surrogate approximation error. Thus, it is capable of supporting and improving the creation of synthetic databases of ECGs from a virtual cohort mapping a representative sample of the human population based on physiologically and anatomically realistic three-dimensional models.","PeriodicalId":100666,"journal":{"name":"Industrial Metrology","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73405142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

New Frontiers in Measurement Uncertainty 测量不确定度的新领域

Industrial Metrology Pub Date : 2022-12-12 DOI: 10.3390/metrology2040029

S. Salicone

引用次数: 1

Uncertainty-Based Autonomous Path Planning for Laser Line Scanners 基于不确定性的激光直线扫描器自主路径规划

Industrial Metrology Pub Date : 2022-12-06 DOI: 10.3390/metrology2040028

M. Vlaeyen, H Han Haitjema, W. Dewulf

引用次数: 1

In Situ Validation Methodology for Weighing Methods Used in Preparing of Standardized Sources for Radionuclide Metrology 用于放射性核素计量标准源制备的称重方法的原位验证方法学

Industrial Metrology Pub Date : 2022-11-04 DOI: 10.3390/metrology2040027

F. Cacais, J. U. Delgado, V. Loayza, J. Rangel

{"title":"In Situ Validation Methodology for Weighing Methods Used in Preparing of Standardized Sources for Radionuclide Metrology","authors":"F. Cacais, J. U. Delgado, V. Loayza, J. Rangel","doi":"10.3390/metrology2040027","DOIUrl":"https://doi.org/10.3390/metrology2040027","url":null,"abstract":"High-accuracy source standards preparation in radionuclide metrology is based on a properly described and reliable weighing procedure able to achieve relative standard uncertainties below 0.1%. However, the results of uncertainty budget comparison CCRI(II)-S7 put in check the ability of the former pycnometer and substitution weighing methods to attain this goal. As a result, a question arises about the validation of mass measurements performed from the elimination weighing method when appropriate uncertainties are required. In order to address this problem, a comprehensive in situ validation methodology is proposed for the results of the pycnometer, substitution, elimination and modified elimination (MEM) methods. Mass comparisons are applied to evaluate the compatibility between weighing methods’ results. It is possible due to a developed weighing sequence, which allows for the performing of all methods by only one drop deposition in the range of mass from 10 mg to 200 mg. As a result, the high degree of compatibility between the MEM and elimination method for uncertainties below 0.1% has been achieved, as well as for higher uncertainties to pycnometer and substitution methods. Numerical simulations indicate that the validation results remain valid on improved technical implementations for these last two methods.","PeriodicalId":100666,"journal":{"name":"Industrial Metrology","volume":"122 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77097127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of an Aeronautical Product Assembly Process Driven by a Metrology Aided Virtual Approach 基于计量辅助虚拟方法的航空产品装配过程仿真

Industrial Metrology Pub Date : 2022-10-06 DOI: 10.3390/metrology2040026

G. Kortaberria, U. Mutilba, Jon Eguskiza, Joel Martins

{"title":"Simulation of an Aeronautical Product Assembly Process Driven by a Metrology Aided Virtual Approach","authors":"G. Kortaberria, U. Mutilba, Jon Eguskiza, Joel Martins","doi":"10.3390/metrology2040026","DOIUrl":"https://doi.org/10.3390/metrology2040026","url":null,"abstract":"Major aircraft manufacturers are expecting the commercial aircraft market to overcome the pre-COVID levels by 2025, which demands an increase in the production rate. However, aeronautical product assembly processes are still mainly manually performed with a low level of automation. Moreover, the current industry digitalization trend offers the possibility to develop faster, smarter and more flexible manufacturing processes, aiming at a higher production rate and product customization. Here, the integration of metrology within the manufacturing processes offers the possibility to supply reliable data to constantly adjust the assembly process parameters aiming at zero-defect, more digital and a higher level of automation manufacturing processes. In this context, this article introduces the virtual metrology as an assistant of the assembly process of the Advanced Rear-End fuselage component. It describes how the assembly process CAD model is used by simulation tools to design, set up and perform the virtual commissioning of the new metrology-driven assembly methods, moving from a dedicated tooling approach to a more flexible and reconfigurable metrology-aided design. Preliminary results show that portable metrology solutions are fit-to-purpose even for hardly accessible geometries and fulfil the current accuracy demands. Moreover, the simulation environment ensures a user-friendly assembly process interaction providing further set-up time reduction.","PeriodicalId":100666,"journal":{"name":"Industrial Metrology","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86875601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bayesian Measurement of Diagnostic Accuracy of the RT-PCR Test for COVID-19 RT-PCR检测新冠肺炎诊断准确性的贝叶斯度量

Industrial Metrology Pub Date : 2022-09-29 DOI: 10.3390/metrology2040025

N. Padhye

{"title":"Bayesian Measurement of Diagnostic Accuracy of the RT-PCR Test for COVID-19","authors":"N. Padhye","doi":"10.3390/metrology2040025","DOIUrl":"https://doi.org/10.3390/metrology2040025","url":null,"abstract":"Reverse transcription polymerase chain reaction (RT-PCR) targeting select genes of the SARS-CoV-2 RNA has been the main diagnostic tool in the global response to the COVID-19 pandemic. It took several months after the development of these molecular tests to assess their diagnostic performance in the population. The objective of this study is to demonstrate that it was possible to measure the diagnostic accuracy of the RT-PCR test at an early stage of the pandemic despite the absence of a gold standard. The study design is a secondary analysis of published data on 1014 patients in Wuhan, China, of whom 59.3% tested positive for COVID-19 in RT-PCR tests and 87.6% tested positive in chest computerized tomography (CT) exams. Previously ignored expert opinions in the form of verbal probability classifications of patients with conflicting test results have been utilized here to derive the informative prior distribution of the infected proportion. A Bayesian implementation of the Dawid-Skene model, typically used in the context of crowd-sourced data, was used to reconstruct the sensitivity and specificity of the diagnostic tests without the need for specifying a gold standard. The sensitivity of the RT-PCR diagnostic test developed by China CDC was estimated to be 0.707 (95% Cr I: 0.664, 0.753), while the specificity was 0.861 (95% Cr I: 0.781, 0.956). In contrast, chest CT was found to have high sensitivity (95% Cr I: 0.969, 1.000) but low specificity (95% Cr I: 0.477, 0.742). This estimate is similar to estimates that were found later in studies designed specifically for measuring the diagnostic performance of the RT-PCR test. The developed methods could be applied to assess diagnostic accuracy of new variants of SARS-CoV-2 in the future.","PeriodicalId":100666,"journal":{"name":"Industrial Metrology","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81815174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Three-Dimensional Point Cloud Task-Specific Uncertainty Assessment based on ISO 15530-3 and ISO 15530-4 Technical Specifications and Model-Based Definition Strategy 基于ISO 15530-3和ISO 15530-4技术规范和基于模型的定义策略的三维点云任务特定不确定性评估

Industrial Metrology Pub Date : 2022-09-27 DOI: 10.3390/metrology2040024

G. Kortaberria, U. Mutilba, Sergio Gomez, Brahim Ahmed

{"title":"Three-Dimensional Point Cloud Task-Specific Uncertainty Assessment based on ISO 15530-3 and ISO 15530-4 Technical Specifications and Model-Based Definition Strategy","authors":"G. Kortaberria, U. Mutilba, Sergio Gomez, Brahim Ahmed","doi":"10.3390/metrology2040024","DOIUrl":"https://doi.org/10.3390/metrology2040024","url":null,"abstract":"Data-driven manufacturing in Industry 4.0 demands digital metrology not only to drive the in-process quality assurance of manufactured products but also to supply reliable data to constantly adjust the manufacturing process parameters for zero-defect manufacturing processes. Better quality, improved productivity, and increased flexibility of manufacturing processes are obtained by combining intelligent production systems and advanced information technologies where in-process metrology plays a significant role. While traditional coordinate measurement machines offer strengths in performance, accuracy, and precision, they are not the most appropriate in-process measurement solutions when fast, non-contact and fully automated metrology is needed. In this way, non-contact optical 3D metrology tackles these limitations and offers some additional key advantages to deploying fully integrated 3D metrology capability to collect reliable data for their use in intelligent decision-making. However, the full adoption of 3D optical metrology in the manufacturing process depends on the establishment of metrological traceability. Thus, this article presents a practical approach to the task-specific uncertainty assessment realisation of a dense point cloud data type of measurement. Finally, it introduces an experimental exercise in which data-driven 3D point cloud automatic data acquisition and evaluation are performed through a model-based definition measurement strategy.","PeriodicalId":100666,"journal":{"name":"Industrial Metrology","volume":"17 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72581058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Doric Foot and Metrological Implications of the Ancient Theatre of Makyneia, Western Greece 希腊西部马基尼亚古代剧院的多利安脚和计量意义

Industrial Metrology Pub Date : 2022-08-19 DOI: 10.3390/metrology2030023

S. Stiros

引用次数: 0

Functional and Metrological Issues in Arterial Simulators for Biomedical Testing Applications: A Review 动脉模拟器在生物医学测试中的功能和计量问题:综述

Industrial Metrology Pub Date : 2022-08-18 DOI: 10.3390/metrology2030022

Fabio Fuiano, A. Scorza, S. Sciuto

引用次数: 1

Simulation Uncertainty for a Virtual Ultrasonic Flow Meter 虚拟超声流量计的仿真不确定度

Industrial Metrology Pub Date : 2022-07-18 DOI: 10.3390/metrology2030021

M. Straka, A. Weissenbrunner, C. Koglin, Christian Höhne, S. Schmelter

{"title":"Simulation Uncertainty for a Virtual Ultrasonic Flow Meter","authors":"M. Straka, A. Weissenbrunner, C. Koglin, Christian Höhne, S. Schmelter","doi":"10.3390/metrology2030021","DOIUrl":"https://doi.org/10.3390/metrology2030021","url":null,"abstract":"Ultrasonic clamp-on meters have become an established technology for non-invasive flow measurements. Under disturbed flow conditions, their measurement values must be adjusted with corresponding fluid mechanical calibration factors. Due to the variety of flow disturbances and installation positions, the experimental determination of these factors often needs to be complemented by computational fluid dynamics (CFD) simulations. From a metrological perspective, substituting experiments with simulation results raises the question of how confidence in a so-called virtual measurement can be ensured. While there are well-established methods to estimate errors in CFD predictions in general, strategies to meet metrological requirements for CFD-based virtual meters have yet to be developed. In this paper, a framework for assessing the overall uncertainty of a virtual flow meter is proposed. In analogy to the evaluation of measurement uncertainty, the approach is based on the utilization of an expanded simulation uncertainty representing the entirety of the computational domain. The study was conducted using the example of an ultrasonic clamp-on meter downstream of a double bend out-of-plane. Nevertheless, the proposed method applies to other flow disturbances and different types of virtual meters. The comparison between laboratory experiments and simulation results with different turbulence modeling approaches demonstrates a clear superiority of hybrid RANS-LES models over the industry standard RANS. With an expanded simulation uncertainty of 1.44e-2, the virtual measurement obtained with a hybrid model allows for a continuous determination of calibration factors applicable to the relevant mounting positions of a real meter at a satisfactory level of confidence.","PeriodicalId":100666,"journal":{"name":"Industrial Metrology","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82607927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1