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2019 12th International Conference on Measurement最新文献

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A Comparison of Multiple-Use Confidence Regions for Multivariate Calibration 多元校准中多用途置信区域的比较
2019 12th International Conference on Measurement Pub Date : 2019-05-27 DOI: 10.23919/MEASUREMENT47340.2019.8779940
M. Chvosteková
{"title":"A Comparison of Multiple-Use Confidence Regions for Multivariate Calibration","authors":"M. Chvosteková","doi":"10.23919/MEASUREMENT47340.2019.8779940","DOIUrl":"https://doi.org/10.23919/MEASUREMENT47340.2019.8779940","url":null,"abstract":"Multivariate calibration problem in this paper deals with the construction of multiple use confidence regions for unknown values of an explanatory variable corresponding to a sequence of values of a multivariate normally distributed response variable, related to the explanatory variable through a multivariate linear model. It is required that at least γ of the constructed multiple use confidence regions will contain the corresponding true value of the explanatory variable with confidence 1 - α. We provide a numerical comparison of the multiple use confidence regions derived by Mathew and Zha (1997), based on the classical estimator for the unknown value of the explanatory variable, and the proposed multiple-use confidence regions constructed by inverting a tolerance region according to the confidence level and the size. Although the estimated confidence of the proposed multiple-use confidence regions is satisfactorily close to the prescribed level in our comparison study, the conservative multiple use confidence regions derived by Mathew and Zha (1997) are narrower in all considered cases in our study and we recommend them for the multivariate calibration task.","PeriodicalId":129350,"journal":{"name":"2019 12th International Conference on Measurement","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121571119","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
Two-Dimensional Linear Comparative Calibration and Measurement Uncertainty 二维线性比较校准与测量不确定度
2019 12th International Conference on Measurement Pub Date : 2019-05-27 DOI: 10.23919/MEASUREMENT47340.2019.8779887
G. Wimmer, V. Witkovský
{"title":"Two-Dimensional Linear Comparative Calibration and Measurement Uncertainty","authors":"G. Wimmer, V. Witkovský","doi":"10.23919/MEASUREMENT47340.2019.8779887","DOIUrl":"https://doi.org/10.23919/MEASUREMENT47340.2019.8779887","url":null,"abstract":"We propose a new comparative calibration model with linear calibration function, suggested for comparison of two measurement devices, each measuring two-dimensional signals (measurements), based on using metrological approach to the expression of uncertainty in measurement. The considered errors-in-variables (EIV) model is nonlinear in its parameters. However, after proper linearization, the calibration parameters can be appropriately evaluated by using the optimum statistical estimation techniques suggested for linear regression models with type II restrictions on the model parameters. Based on that, we propose an iterative algorithm for estimating the parameters of the linear calibration function and also a method for evaluation of the uncertainty in measurement with using the calibrated device.","PeriodicalId":129350,"journal":{"name":"2019 12th International Conference on Measurement","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114055199","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
The Experimental Setup for T2* Mapping in Achilles tendon and Enthesis 跟腱和髋端T2*定位的实验装置
2019 12th International Conference on Measurement Pub Date : 2019-05-27 DOI: 10.23919/MEASUREMENT47340.2019.8779934
P. Latta, V. Juras, M. Kojan, Z. Starčuk, X. Deligianni, O. Bieri, P. Szomolanyi, I. Frollo, S. Trattnig
{"title":"The Experimental Setup for T2* Mapping in Achilles tendon and Enthesis","authors":"P. Latta, V. Juras, M. Kojan, Z. Starčuk, X. Deligianni, O. Bieri, P. Szomolanyi, I. Frollo, S. Trattnig","doi":"10.23919/MEASUREMENT47340.2019.8779934","DOIUrl":"https://doi.org/10.23919/MEASUREMENT47340.2019.8779934","url":null,"abstract":"The experimental setup for accurate T2 * mapping of Achilles tendon and enthesis was developed. The setup consists of a specially designed MR compatible RF coil holder and custom-made ultrashort echo time (UTE) pulse sequence. The performance of the UTE sequence was tested and compared with data obtained by variable echo time (vTE) sequence. The results showed that T2* values calculated with vTE are overestimated in comparison to UTE, however, the clinical adaptation of vTE might be easier, since it provides more slices with reduced blurring and lower scan times.","PeriodicalId":129350,"journal":{"name":"2019 12th International Conference on Measurement","volume":"641 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131657654","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
Gradient Offset Calibration Used for B0Homogeneity 梯度偏移校准用于b0均匀性
2019 12th International Conference on Measurement Pub Date : 2019-05-27 DOI: 10.23919/MEASUREMENT47340.2019.8779908
D. Gogola, P. Szomolanyi, L. Baciak, I. Frollo
{"title":"Gradient Offset Calibration Used for B0Homogeneity","authors":"D. Gogola, P. Szomolanyi, L. Baciak, I. Frollo","doi":"10.23919/MEASUREMENT47340.2019.8779908","DOIUrl":"https://doi.org/10.23919/MEASUREMENT47340.2019.8779908","url":null,"abstract":"Correct operation of the magnetic resonance (MR) scanner requires a main static magnetic field to be as homogeneous as possible. This is important in both, magnetic resonance imaging (MRI) and also in magnetic resonance spectroscopy (MRS). GRCalculation of sequence parameters as well as the calibration method with experimental verification of the results are described.","PeriodicalId":129350,"journal":{"name":"2019 12th International Conference on Measurement","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114722951","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
Evaluation of Activation Times in Ventricular Model with Realistic Geometry and Conduction System 用真实几何和传导系统评价心室模型的激活次数
2019 12th International Conference on Measurement Pub Date : 2019-05-27 DOI: 10.23919/MEASUREMENT47340.2019.8779956
E. Cocherová, J. Svehlíková, M. Tysler
{"title":"Evaluation of Activation Times in Ventricular Model with Realistic Geometry and Conduction System","authors":"E. Cocherová, J. Svehlíková, M. Tysler","doi":"10.23919/MEASUREMENT47340.2019.8779956","DOIUrl":"https://doi.org/10.23919/MEASUREMENT47340.2019.8779956","url":null,"abstract":"The goal of the article was to design a model of ventricles with a realistic patient geometry and with a proper representation of the conduction system of ventricles that enables to reach the total activation time of the whole ventricles in the physiological range of about 80 to 120 ms. Electrical activation was started in one region or in nine starting regions. The conduction system (branches and Purkinje fibers) was modeled as an endocardial layer with higher conductivity and a set of nine starting regions representing the earliest activated areas. The monodomain model of electrical activation propagation with the local tissue properties defined by modified FitzHugh-Nagumo equations was numerically solved in Comsol Multiphysics environment. The total activation time of the whole ventricles was evaluated for all models. Pathological total activation times of the whole ventricles higher than 120 ms were obtained for models with activation starting only in one region (ectopic beats). Realistic total activation time was obtained for model incorporating an endocardial conducting layer with nine starting regions representing the conduction system.","PeriodicalId":129350,"journal":{"name":"2019 12th International Conference on Measurement","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122781659","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
Multichannel Wireless Bioelectric Potential Measurement: State of the Art and Applicability for BSP Mapping 多通道无线生物电势测量:BSP测绘的技术现状和适用性
2019 12th International Conference on Measurement Pub Date : 2019-05-27 DOI: 10.23919/MEASUREMENT47340.2019.8779993
Miroslav Haška, M. Tysler
{"title":"Multichannel Wireless Bioelectric Potential Measurement: State of the Art and Applicability for BSP Mapping","authors":"Miroslav Haška, M. Tysler","doi":"10.23919/MEASUREMENT47340.2019.8779993","DOIUrl":"https://doi.org/10.23919/MEASUREMENT47340.2019.8779993","url":null,"abstract":"High-resolution multichannel bioelectric potential measurement is required for diagnostic methods of various cardiac and brain diseases. The systems previously developed in our lab are streaming measured data to PC over an optical USB cable. Disadvantages of these systems are that the personnel should be careful when manipulating with the cables and difficulty of mounting the electrodes on the patients. New wireless standards enable high data rate transmission. The newest wireless Bluetooth and Wi-Fi standards were studied and specifications of these standards were evaluated for possible usage in multichannel battery powered measuring systems.","PeriodicalId":129350,"journal":{"name":"2019 12th International Conference on Measurement","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131467441","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
Functional Connectivity Biomarkers Based on Resting-State EEG for Stroke Recovery 基于静息状态脑电图的脑卒中恢复功能连接生物标志物研究
2019 12th International Conference on Measurement Pub Date : 2019-05-01 DOI: 10.23919/MEASUREMENT47340.2019.8779964
M. F. Issa, Adam Gyulai, G. Kozmann, Z. Nagy, Z. Juhasz
{"title":"Functional Connectivity Biomarkers Based on Resting-State EEG for Stroke Recovery","authors":"M. F. Issa, Adam Gyulai, G. Kozmann, Z. Nagy, Z. Juhasz","doi":"10.23919/MEASUREMENT47340.2019.8779964","DOIUrl":"https://doi.org/10.23919/MEASUREMENT47340.2019.8779964","url":null,"abstract":"Closed eye resting-state EEG measurement was performed for healthy volunteers and stroke patients. Functional connectivity graphs were created using the debiased weighted Phase Lag Index as an association measure. Thresholded graphs of the delta, theta, alpha, and beta frequency bands were used for comparing connectivity measures between patients and control group as well as between the start and end of the stroke rehabilitation interval. Differences were found in the graph degree, clustering coefficient, global and local efficiency, which correlate with brain plasticity changes during stroke recovery and might be used as biomarkers to quantify stroke severity and outcome of recovery.","PeriodicalId":129350,"journal":{"name":"2019 12th International Conference on Measurement","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114992731","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
The GUM Revision: Where do We Stand? A Personal View 口香糖修订版:我们站在哪里?个人观点
2019 12th International Conference on Measurement Pub Date : 2019-05-01 DOI: 10.23919/MEASUREMENT47340.2019.8779968
I. Lira
{"title":"The GUM Revision: Where do We Stand? A Personal View","authors":"I. Lira","doi":"10.23919/MEASUREMENT47340.2019.8779968","DOIUrl":"https://doi.org/10.23919/MEASUREMENT47340.2019.8779968","url":null,"abstract":"The ‘Guide to the Expression of Uncertainty in Measurement’ (GUM) has been in use for more than 20 years, serving its purposes worldwide at all levels of metrology, from scientific to industrial and commercial applications. However, because it presents some inconsistencies, both internally and with respect to its two later Supplements, the Joint Committee for Guides in Metrology, which is responsible for this document, decided that a major revision of the GUM should be undertaken. In the present contribution, I present the motives for revising the GUM and the reasons why a draft of the revision was not well received by the metrological community.","PeriodicalId":129350,"journal":{"name":"2019 12th International Conference on Measurement","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115669952","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
A New Method of Measuring the Physical Quantities 测量物理量的新方法
2019 12th International Conference on Measurement Pub Date : 2019-05-01 DOI: 10.23919/MEASUREMENT47340.2019.8779951
R. Hart'anský, M. Mierka
{"title":"A New Method of Measuring the Physical Quantities","authors":"R. Hart'anský, M. Mierka","doi":"10.23919/MEASUREMENT47340.2019.8779951","DOIUrl":"https://doi.org/10.23919/MEASUREMENT47340.2019.8779951","url":null,"abstract":"The article deals with the design of a new method and apparatus for measuring mechanical quantities, in particular force and pressure, without electrical connection of the sensing element to the evaluation device. Information on the applied mechanical magnitude is transmitted only by changes in the electromagnetic field generated around the sensor.","PeriodicalId":129350,"journal":{"name":"2019 12th International Conference on Measurement","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127094563","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
Designing a Triaxial Gaussmeter for Magnetic Impedance Tomography 磁阻抗层析成像三轴高斯计的设计
2019 12th International Conference on Measurement Pub Date : 2019-05-01 DOI: 10.23919/MEASUREMENT47340.2019.8780074
Z. Roubal, T. Hejtmánek, T. Kríz
{"title":"Designing a Triaxial Gaussmeter for Magnetic Impedance Tomography","authors":"Z. Roubal, T. Hejtmánek, T. Kríz","doi":"10.23919/MEASUREMENT47340.2019.8780074","DOIUrl":"https://doi.org/10.23919/MEASUREMENT47340.2019.8780074","url":null,"abstract":"Magnetic impedance tomography is an image reconstruction method exploiting the conductivity distribution on the surface of the investigated sample. To facilitate the actual reconstruction, we have to map the magnetic field on the given surface; however, none of the commercially available Gaussmeters enables the user to employ an external signal for synchronous detection, meaning that our device is unique in this respect. The applicability of the proposed design in practical measurement is demonstrated within the paper.","PeriodicalId":129350,"journal":{"name":"2019 12th International Conference on Measurement","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114521888","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
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