دانلود رایگان مقاله لاتین سرعت موج پالس در داخل بدن از سایت الزویر
عنوان فارسی مقاله:
تکنیک افست مرحله آماری جدید برای محاسبه سرعت موج پالس در داخل بدن
عنوان انگلیسی مقاله:
A new statistical phase offset technique for the calculation of in vivo pulse wave velocity
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Pulse wave velocity (PWV) is the most important surrogate to assess arterial stiffness, an important indicator of increased cardio-vascular disease risk.14 There are many techniques currently used to determine PWV in vitro and in vivo, however there is still no “gold standard” for calculating PWV from in vivo measurements as many of the existing techniques are unsatisfactory due to inconsistent results or excessive implementation complexity.1,4,13,21 The anatomical location of the vessel from which blood pressure is being collected effects the technique of data collection and analysis techniques that can be used. The pulmonary artery lies deep within the thorax making surface measurements extremely difficult and requiring the need for an in vivo data collection and PWV calculation techniques. The blood pressure in the pulmonary artery is also affected by the respiration of the horse making techniques that require numerous cardiac cycles more difficult to employ. The cyclic blood pressure in the pulmonary artery is elevated during expiration and decreased during inspiration.19 The effect of this on the arterial pulse pressure waveform is an extended diastolic phase which limits the number of consecutive cardiac cycles that can be easily used for pulse wave velocity calculation to approximately 2-6.19 Pressure pulse waveform shape is also different between the pulmonary and systemic systems. Common to all in vivo PWV calculation techniques is the use of pulse wave transit time. Therefore, an accurate calculation of transit time is important in generating reliable PWV values. Transit time is described as the time it takes for a pulse pressure waveform to travel between two known sensor locations. PWV is then determined using
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کلمات کلیدی:
A new technique for calculation of maximum achievable gain and ... ieeexplore.ieee.org/document/4433865/ by N Bayhan - 2007 - Cited by 6 - Related articles In this paper, a new method is suggested to compute maximum achievable gain and phase margins that can be achieved using a proportional controller. [PDF]A Phase-Offset Estimation Method for InSAR DEM Generation Based ... www.mdpi.com/2072-4292/4/3/745/pdf by JC Mura - 2012 - Cited by 14 - Related articles Mar 20, 2012 - The method is validated against traditional phase offset estimation ..... height interval, [hmin, hmax], one can combine them creating a new ..... Phase-offset error between the two phase-offset estimation methods. Statistics. Advances in Nonlinear Speech Processing: 5th International ... https://books.google.com/books?isbn=3642250203 Carlos M. Travieso-González, Jesús Alonso-Hernández - 2011 - Computers Besides, efficient techniques of glottal analysis require to process pitch ... An error on its determination results in a severe impact on the reliability and accuracy performance. ... This paper proposes a new approach for the automatic detection of speech polarity which is based on the phase shift between two oscillating ... Progress in Applied Mathematical Modeling https://books.google.com/books?isbn=1600219764 Fengshan Yang - 2008 - Mathematics ... a small (0.2;r) phase shift between the first and the second functions, which results in ... It is shown that the new method is capable of extracting the correlation ... to statistical errors in calculating the variances of the involved random variables ... Third-Generation Neuroimaging: Translating Research into Clinical ... https://books.google.com/books?isbn=2889450449 André Schmidt, Stefan Borgwardt - 2016 There is greater statistical reliability with shorter time series than measures that make ... is often calculated using Welch's modified periodogram averaging method (80). ... As the phase shift, θ, progresses from 0 to π 2, the zero-lag correlation ... IJPHM Special Issue on Wind Turbine PHM (Color) https://books.google.com/books?isbn=1936263092 PHM Society It only reflects the shift of the current signal, however, it does not exactly show how much the phase shift is with respect to the corresponding voltage signal. ... Hence, a new CM criterion, , is designed as: (1) where (2) refers to the frequency of ... It is based on a statistical calculation of the generator stator line current and the ...
