The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
R D Throne - One of the best experts on this subject based on the ideXlab platform.
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Scatter Diagram analysis for distinguishing sinus rhythm from monomorphic ventricular tachycardia
Computers in Cardiology 1995, 1995Co-Authors: R D ThroneAbstract:The author has recently developed Scatter Diagram Analysis (SDA), a very computationally efficient technique for determining whether signals measured from two sites have a repeatable temporal relationship. In this paper, SDA is extended to distinguish between signals which have regular though different temporal relationships between signals measured at two sites. Two such signals are sinus rhythm and monomorphic ventricular tachycardia.
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Scatter Diagram analysis a new technique for discriminating ventricular tachyarrhythmias
Pacing and Clinical Electrophysiology, 1994Co-Authors: R D Throne, John R Windle, Arthur R Easley, Brian Olshansky, David J WilberAbstract:: With the increasing flexibility allowed by implantable cardioverter defibrillators that use tiered therapy, it is important to match the therapy with the arrhythmia. In this article we present Scatter Diagram analysis, a new computationally efficient two-channel algorithm for distinguishing monomorphic ventricular tachycardia (VT) from polymorphic ventricular tachycardia and ventricular fibrillation (VF). Scatter Diagram analysis plots the amplitude from one channel versus the amplitude from another channel on a graph with a 15 x 15 grid. The fraction (percentage) of the 225 grid blocks occupied by at least one sample point is then determined. We found that monomorphic VT traces nearly the same path in space and occupies a smaller percentage of the graph than a nonregular rhythm such as polymorphic VT or VF. Scatter Diagram analysis was tested on 27 patients undergoing intraoperative implantable cardioverter defibrillator testing. Passages of 4.096 seconds were obtained from rate (bipolar epicardial) and morphology (patch) leads, and digitized at 125 Hz. Scatter Diagram analysis distinguished 13 episodes of monomorphic VT (28.6% +/- 4.0%) from 27 episodes of polymorphic VT or VF (48.0% +/- 8.2%) with P < 0.0005. There was overlap in only one monomorphic VT episode and one polymorphic VT or VF episode.
Fei Wang - One of the best experts on this subject based on the ideXlab platform.
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Investigation on relevance between test score and cultural background
2010 The 2nd International Conference on Industrial Mechatronics and Automation, 2010Co-Authors: Chengcheng Zhang, Fei WangAbstract:Cultural background refers to the material culture and spiritual cultural environment which have impact on people's physical and mental development and character formation. There are some relationship within college english learning and student's cultural background. To figure out the relevance between college english course test score and cultural background, an investigation about these two factors based on linear regression analysis is presented in this paper. Linear regression analysis is introduced and the figures of correlation between test score and cultural background are ploted following the test score records and cultural background index. The Scatter Diagram and linear regression analysis of four classes indicate that the college english course test score tightly related to the cultural background.
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Investigation on relevance between CET-4 and College English course test score
2010 The 2nd International Conference on Industrial Mechatronics and Automation, 2010Co-Authors: Chengcheng Zhang, Fei WangAbstract:English is an important compulsory course for students of non-English majors. College english test band 4 (CET-4) is a large-scale standardized test designed and developed by the National College English Testing Committee (NCETC), and it were directed and supervised by the Department of Higher Education of the Ministry of Education. CET-4 is very important for college students and teachers. The relevance between college english course test score and CET-4 score is explored based on linear regression analysis in this paper. Linear regression analysis is introduced and the figures of correlation between college english course test score and CET-4 score are ploted as Scatter Diagram and linear regression analysis model. Base on the data of eight classes, it is indicate that the CET-4 score is tightly related to the college english course test score.
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Research on correlation analysis between test score and classroom attendance based on linear regression model
2010 The 2nd International Conference on Industrial Mechatronics and Automation, 2010Co-Authors: Chengcheng Zhang, Fei WangAbstract:Test score is the main criteria to measure the learning effort of students. There are many factors may improve or lower the test score or examination results, such as classroom attendance, home work, communication and interaction, teaching methods, self-learning, review, discussion, etc. It is very important to teachers and students to figure out the inherent correlation between test score and these factors. In this paper, a research on correlation analysis between test score and classroom attendance based on linear regression model is presented. Regression analysis is introduced and the curves of correlation between test score and classroom attendance are ploted based on the test score and classroom attendance records during two years. The Scatter Diagram and linear regression model of three courses indicate that the test score or examination results closely related to the classroom attendance.
O Durand - One of the best experts on this subject based on the ideXlab platform.
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application of the Scatter Diagram technique to the scanning electron microscope preliminary results from diamond
Scanning, 2006Co-Authors: J M Patat, J Cazaux, P Lehuede, O DurandAbstract:Summary: Using primary beam energies E 0 ranging from 0.2 to 15 keV and an in-lens detector, a series of images of the same region of an artificial microstructured diamond sample have been acquired in scanning electron microscopy. Next, the images were analysed by using a Scatter Diagram technique to underline the topographic contrast change and contrast reversal. The results obtained from 0.5 to 15 keV are discussed with the help of an expression derived from the constant loss model for the secondary electron yield δ of diamond, but including the respective roles of the angle of incidence, i, and of the angle of detection, α. More surprising is the quality of images obtained at a beam energy as low as 0.2 keV, and more difficult to explain is the significant contrast change between 0.2 keV and 0.5 keV. For the first time, Scatter Diagrams are used as a diagnostic tool in scanning electron microscopy, and after some improvements it is hoped that the experimental approach followed here may lead to quantitative estimates of the local tilts of a specimen surface.
Xavier Savatier - One of the best experts on this subject based on the ideXlab platform.
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IMU/LIDAR based positioning of a gangway for maintenance operations on wind farms
IEEE International Conference on Intelligent Robots and Systems, 2014Co-Authors: Pierre Merriaux, Perrine Vasseur, Rémi Boutteau, Xavier SavatierAbstract:This article studies the feasibility of an exteroceptive system for the contactless control of a motion-compensated gangway which can be used for maintenance operations on offshore wind farms. Our study shows that current systems based only on inertial systems are not accurate enough to ensure the gangway is held in place without being secured mechanically. Using measurements from a 2D LIDAR system, we propose a method for the real-time monitoring of the position of the gangway in relation to the offshore wind turbine. Our algorithm involves detecting and estimating the position of the wind turbine pile in a 2D Scatter Diagram using robust approaches. To evaluate our method, we have installed a real-time 3D simulation chain fed with data from actual measurements. We obtain a measurement accuracy of the order of a centimeter, in real time, in representative sea state scenarios.
R Burrows - One of the best experts on this subject based on the ideXlab platform.
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wave predictions based on Scatter Diagram data a computer program package
Advances in Engineering Software, 1995Co-Authors: R Capitao, R BurrowsAbstract:Abstract This paper describes a user-friendly computer program package containing an approach for the prediction of extreme waves based on the extrapolation of the Scatter Diagram of significant wave height Hs and mean zero-upcrossing period Tz. Following the validity tests of data input, the computer program takes into account the existence of missing data and calms and includes routines for the treatment of various theoretical descriptions of Hs. Sensitivity studies have been completed to appraise the changes in wave predictions due to missing data considered either as calms or instrument failure and due to inadequacies of measurement systems to record low Tz values. The possible influence of currents on extreme wave height predictions has also been taken into account. For example purposes, the computer program is used for the prediction of extreme wave heights in a location (Morecambe Bay, UK) where wave data (Scatter Diagrams) are available.
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wave predictions based on Scatter Diagram data a review
Advances in Engineering Software, 1995Co-Authors: R Capitao, R BurrowsAbstract:This paper reviews some of the methods available to the engineer for the prediction of extreme waves. It then focuses on the long-term individual wave height method in detail. Comments on the errors likely to occur during either collection or analysis of wave data are emphasized since large errors can arise from defective data. In particular, the problem of dependence of data values constituting a sample, statistical assumptions and data limitations are discussed.
