Accuracy of measurement

The purpose of Measurement, Instrumentation, and Sensors Handbook CRCnetBase 1999 is to provide a reference that is both concise and useful for engineers in industry, scientists, designers, managers, research personnel and students, as well as many others who have measurement problems. The CD-ROM covers an extensive range of topics that comprise the subject of measurement, instrumentation, and sensors. The CD-ROM describes the use of instruments and techniques for practical measurements required in engineering, physics, chemistry, and the life sciences.

0p camchuong_1 04-12-2012 96 25   Download

I have been associated with uncertainty calculations for quite sometime. Asia Metrology Program (APMP) took interest in unification of expressing the measurement results along with uncertainty. In those days the uncertainty components were divided according to source of errors. The errors were named as random and systematic errors. Hence components of uncertainty were named random uncertainty and systematic uncertainty. Around 1980, BIPM took initiative by circulating questioners to the countries who were members of Metre Convention.

342p camchuong_1 04-12-2012 33 3   Download

In a structured light system, calibration is an important step for estimating the intrinsic and extrinsic parameters of the camera and projector. System calibration errors directly affect the measurement errors. Therefore, the accurate calibration is the main prerequisite for a successful and accurate surface reconstruction. In this paper, the effect of checker size and checkerboard angle on the accurate calibration for a structured light system is presented.

6p trangcham1896 10-12-2018 5 0   Download

Every day we make measurements, yet, do we consider the accuracy of that measurement? If you are a provider of service or product then this publication will help you to take your quality systems to levels that can save you time and money, improving your methodology and giving you a clearer understanding on how to measure up. In many cases measurements are made as a guide for approximating, therefore...

42p namde04 03-05-2013 48 7   Download

In particular, we examine whether the discourse coherence found in an essay, as de ned by a measure of relative proportion of Rough-Shift transitions, might be a signi cant contributor to the accuracy of computer-generated essay scores. Our positive nding validates the role of the Rough-Shift transition and suggests a route for exploring Centering Theory's practical applicability to writing evaluation and instruction.

8p bunrieu_1 18-04-2013 29 3   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài:Measuring the accuracy of genome-size multiple alignments...

11p thulanh19 05-11-2011 32 2   Download

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Accuracy of biplane x-ray imaging combined with model-based tracking for measuring in-vivo patellofemoral joint motion

8p panasonic10 13-01-2012 27 2   Download

In this paper, we study different centrality measures being used in predicting noun phrases appearing in the abstracts of scientific articles. Our experimental results show that centrality measures improve the accuracy of the prediction in terms of both precision and recall. We also found that the method of constructing Noun Phrase Network significantly influences the accuracy when using the centrality heuristics itself, but is negligible when it is used together with other text features in decision trees. ...

6p bunbo_1 17-04-2013 30 2   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Correlating measurements across samples improves accuracy of large-scale expression profile experiments...

0p thulanh21 15-11-2011 28 1   Download

When one considers the criteria according to which an analytical procedure is selected, precision and accuracy are usually the first time to come to mind. Precision and accuracy together determine the error of an individual determination. They are among the most important criteria for judging analytical procedures by their results. Precision refers to the reproducibility of measurement within a set, that is, to the scatter of dispersion of a set about its central values. The term ‘set’ is defined as referring to a number (n) of independent replicate measurements of some property.

204p kmkmkmkmkm 06-09-2012 23 1   Download

Accurate log processing by harvesters during bucking is of great importance if round timber is to be fully exploited for maximum value recovery. Logs that exceed the target length can cause difficulties in further processing (e.g., in the pulp industry), while logs which are too short may not be of further use (e.g., boards for pallets).

6p danhdanh11 11-01-2019 4 0   Download

This weighting method based on statistical estimation of the importance of a word for an SMS categorization problem. The experiments reported in the paper shows that this weighting method improves significantly the classification accuracy as measured on many categorization tasks.

6p girlsseek 27-02-2019 9 0   Download

In this paper, the effect of checker size and checkerboard angle on the accurate calibration for a structured light system is presented. Relations between calibration error and checker size, fitting plane error and checkerboard angle are also studied.

6p visasuke2711 25-04-2019 1 0   Download

Our interest in the measurement of air and water flow is timeless. Knowledge of the direction and velocity of air flow was essential information for all ancient navigators, and the ability to measure water flow was necessary for the fair distribution of water through the aqueducts of such early communities as the Sumerian cities of Ur, Kish, and Mari near the Tigris and Euphrates Rivers around 5,000 B.C. Even today, the distribution of water among the rice patties of Bali is the sacred duty of authorities designated the ÒWater Priests.Ó...

100p thai_ngh 24-06-2010 90 23   Download

The findings, interpretations, and conclusions expressed in this book are entirely those of the authors and should not be attributed in any manner to the World Bank, to its affiliated organizations, or to members of its Board of Executive Directors or the countries they represent. The World Bank does not guarantee the accuracy of the data included in this publication and accepts no responsibility for any consequence of their use.

88p minhhai20789 25-04-2011 60 14   Download

For the reflection or describing, with accuracy, an appearance (substance, quantity); material or psychological status of the research subject, are needed to measure them as definite standards. The measurement is not only the definite size of physical dimension but also whatever concepts, which can be compared each other.

36p chucung 13-01-2011 65 9   Download

The aim of this work is to provide an introduction into nanotechnology for the scientifically interested. However, such an enterprise requires a balance between comprehensibility and scientific accuracy. In case of doubt, preference is given to the latter. Much more than in microtechnology – whose fundamentals we assume to be known – a certain range of engineering and natural sciences are interwoven in nanotechnology.

260p ktcn_1 17-07-2012 27 6   Download

The accuracy of a machined part depends on the precision motion delivered by a machine tool under static, dynamic, and thermal loads. The accuracy is evaluated by measuring the discrepancy between the desired part dimensions identified on a part drawing and the actual part achieved after machining operations.

13p phuphong 10-12-2009 68 5   Download

State-of-the-art statistical machine translation (MT) systems have made significant progress towards producing user-acceptable translation output. However, there is still no efficient way for MT systems to inform users which words are likely translated correctly and how confident it is about the whole sentence. We propose a novel framework to predict wordlevel and sentence-level MT errors with a large number of novel features. Experimental results show that the MT error prediction accuracy is increased from 69.1 to 72.2 in F-score. ...

9p hongdo_1 12-04-2013 29 4   Download

In this paper we focus on the recent Spanish credit cycle which largely explains the banking problems in this country and, in particular, the episodes of financial instability and uncertainty that the Spanish banking sector suffered during 2009 and 2010. These episodes gave, in turn, rise to the implementation of banking restructuring plans in 2010 and early 2011.

68p enterroi 01-02-2013 23 3   Download