Journal of Research of the National Institute of Standards and Technology最新文献_第9页

Forced Edges and Graph Structure. 强制边和图结构。

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2019-11-19 eCollection Date: 2019-01-01 DOI: 10.6028/jres.124.022

Brian Cloteaux

引用次数: 2

Influence of Isotopologue Dipole Moments on Precision Dielectric-Constant Measurements. 同位素偶极矩对精密介电常数测量的影响。

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2019-11-04 eCollection Date: 2019-01-01 DOI: 10.6028/jres.124.031

Allan H Harvey

引用次数: 0

Optical-Fiber Power Meter Comparison between NIST and LAMETRO. NIST与LAMETRO光纤功率计之比较。

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2019-11-01 eCollection Date: 2019-01-01 DOI: 10.6028/jres.124.030

I Vayshenker, J Jimenez, M P Ugalde, J H Lehman

引用次数: 0

Nestor: A Tool for Natural Language Annotation of Short Texts. 一种短文本自然语言注释工具。

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2019-11-01 eCollection Date: 2019-01-01 DOI: 10.6028/jres.124.029

Thurston B Sexton, Michael P Brundage

{"title":"Nestor: A Tool for Natural Language Annotation of Short Texts.","authors":"Thurston B Sexton, Michael P Brundage","doi":"10.6028/jres.124.029","DOIUrl":"https://doi.org/10.6028/jres.124.029","url":null,"abstract":"Nestor is a software tool that annotates natural language CSV (comma-separated\u0000 variable) files, with a UTF-8 (Unicode Transformation Format – 8-bit) encoding,\u0000 using a process called tagging [1]. The objective of Nestor is to help analysts make\u0000 their natural language data, which is often unstructured, filled with technical\u0000 content, jargon, mispellings, and abbreviations, computable to improve analysis. An\u0000 example of natural language data that could be input to Nestor and the subsequent\u0000 output data and the corresponding output is shown in Table 1. The annotated datasets\u0000 generated by Nestor (as either a CSV or .h5 file) can be used for different analysis\u0000 techniques, such as failure prediction, problem hot spot identification, and\u0000 maintenance technician expertise assessment, as shown in [2–10]. Currently, the\u0000 majority of use cases involve maintenance in the engineering domain (manufacturing,\u0000 mining, heating ventilation and air conditioning (HVAC)), however, any natural\u0000 language CSV file with UTF-8 encoding can be input to Nestor.","PeriodicalId":54766,"journal":{"name":"Journal of Research of the National Institute of Standards and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.6028/jres.124.029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39955059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

A Purely Algebraic Justification of the Kabsch-Umeyama Algorithm. Kabsch-Umeyama算法的纯代数证明。

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2019-10-09 eCollection Date: 2019-01-01 DOI: 10.6028/jres.124.028

Jim Lawrence, Javier Bernal, Christoph Witzgall

{"title":"A Purely Algebraic Justification of the Kabsch-Umeyama Algorithm.","authors":"Jim Lawrence, Javier Bernal, Christoph Witzgall","doi":"10.6028/jres.124.028","DOIUrl":"https://doi.org/10.6028/jres.124.028","url":null,"abstract":"The constrained orthogonal Procrustes problem is the least-squares problem that calls for a rotation matrix that optimally aligns two matrices of the same order. Over past decades, the algorithm of choice for solving this problem has been the Kabsch-Umeyama algorithm, which is effectively no more than the computation of the singular value decomposition of a particular matrix. Its justification, as presented separately by Kabsch and Umeyama, is not totally algebraic since it is based on solving the minimization problem via Lagrange multipliers. In order to provide a more transparent alternative, it is the main purpose of this paper to present a purely algebraic justification of the algorithm through the exclusive use of simple concepts from linear algebra. For the sake of completeness, a proof is also included of the well known and widely used fact that the orientation-preserving rigid motion problem, i.e., the least-squares problem that calls for an orientation-preserving rigid motion that optimally aligns two corresponding sets of points in d-dimensional Euclidean space, reduces to the constrained orthogonal Procrustes problem.","PeriodicalId":54766,"journal":{"name":"Journal of Research of the National Institute of Standards and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.6028/jres.124.028","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39578675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Calibration. 校准。

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2019-10-02 eCollection Date: 2019-01-01 DOI: 10.6028/jres.124.027

Lane C Sander

{"title":"Calibration.","authors":"Lane C Sander","doi":"10.6028/jres.124.027","DOIUrl":"https://doi.org/10.6028/jres.124.027","url":null,"abstract":"In the context of chemical metrology, calibration is the process of relating a\u0000 known quantity of an analyte to the corresponding measured instrumental response\u0000 through a mathematical relationship. Calibration permits the assignment of analyte\u0000 levels in unknown samples based on the known levels of the calibrants. Details of\u0000 the calibration model are important to achieve accurate results. Several common\u0000 approaches are used in calibrating methods. Most frequently, calibration models are\u0000 based on linear instrumental response, with mathematical models that include zero\u0000 intercept, fixed intercept, unconstrained (fitted), and bracketed models. When\u0000 instrumental response is nonlinear, a linear model may still provide accurate\u0000 results if the calibration range is sufficiently limited. This presentation will\u0000 provide an overview and application of various calibration models, with\u0000 recommendations of ways to improve measurement accuracy. Examples are presented that\u0000 illustrate advantages and disadvantages for each of these models as applied to low\u0000 level samples and to unknowns with levels that span several orders of\u0000 magnitude.","PeriodicalId":54766,"journal":{"name":"Journal of Research of the National Institute of Standards and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2019-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.6028/jres.124.027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39955050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Use of Correlated Binomial Distribution in Estimating Error Rates for Firearm Evidence Identification. 相关二项分布在枪支证据识别错误率估计中的应用。

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2019-10-02 eCollection Date: 2019-01-01 DOI: 10.6028/jres.124.026

Nien Fan Zhang

{"title":"The Use of Correlated Binomial Distribution in Estimating Error Rates for Firearm Evidence Identification.","authors":"Nien Fan Zhang","doi":"10.6028/jres.124.026","DOIUrl":"https://doi.org/10.6028/jres.124.026","url":null,"abstract":"In the branch of forensic science known as firearm evidence identification, estimating error rates is a fundamental challenge. Recently, a new quantitative approach known as the congruent matching cells (CMC) method was developed to improve the accuracy of ballistic identifications and provide a basis for estimating error rates. To estimate error rates, the key is to find an appropriate probability distribution for the relative frequency distribution of observed CMCs overlaid on a relevant measured firearm surface such as the breech face of a cartridge case. Several probability models based on the assumption of independence between cell pair comparisons have been proposed, but the assumption of independence among the cell pair comparisons from the CMC method may not be valid. This article proposes statistical models based on dependent Bernoulli trials, along with corresponding methodology for parameter estimation. To demonstrate the potential improvement from the use of the dependent Bernoulli trial model, the methodology is applied to an actual data set of fired cartridge cases.","PeriodicalId":54766,"journal":{"name":"Journal of Research of the National Institute of Standards and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2019-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.6028/jres.124.026","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39578668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Century of WWV. 一个世纪的世界大战。

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2019-09-24 eCollection Date: 2019-01-01 DOI: 10.6028/jres.124.025

Glenn K Nelson

引用次数: 2

Improving Reproducibility in Research: The Role of Measurement Science. 提高研究的可重复性:测量科学的作用。

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2019-09-18 eCollection Date: 2019-01-01 DOI: 10.6028/jres.124.024

Robert J Hanisch, Ian S Gilmore, Anne L Plant

引用次数: 6

Variation of Surface Topography in Laser Powder Bed Fusion Additive Manufacturing of Nickel Super Alloy 625. 625镍超级合金激光粉末床熔融增材加工中表面形貌的变化

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2019-09-10 eCollection Date: 2019-01-01 DOI: 10.6028/jres.124.023

Jason C Fox

引用次数: 7