نتایج جستجو برای: peak wave period

تعداد نتایج: 819965  

Journal: :Han-gug hae-an hae-yang gonghaghoe nonmunjib 2022

In this study, a smoothing method was applied to improve the accuracy of peak wave period estimation using water surface elevation observed from Oceanographic and Meteorological Observation Tower located on west coast Korean Peninsula. Validation application performed variance total amount energy, then effect analyzed. As result analysis, correlation coefficient between energy 0.9994, confirmin...

2010
Paul A. Hwang Mark A. Sletten Jakov V. Toporkov

[1] The technique for extracting wave period and wave direction from radar backscattering intensity is well developed, but the determination of spectral density or wave height is hindered by the complex nature of the modulation transfer function. In contrast to backscattering intensity, the Doppler signal of a coherent radar is originated from the radial velocity of the scattering objects. Its ...

2010
Jian Sun Changlong Guan Lin Mu

In this study, we present an approach to retrieve wave period, phase speed at the peak of the spectrum and thus the wave age from SAR image mode precision image (PRI) data around the coast of Japan. The in-situ NOWPHAS wave gauge data is used for matching up the SAR images and for validation. The wind speed at 10m height is acquired by inverting the relationship between the radar cross section ...

2016
Arvydas Ambrozaitis Daiva Radzišauskienė Kęstutis Žagminas Nerija Kuprevičienė Stefan Gravenstein Ligita Jančorienė

The objective of this study is to describe the clinical and epidemiological characteristics of patients hospitalized in Lithuania who are infected with influenza A(H1N1)pdm09 and to compare pandemic A(H1N1) pdm09 infection with postpandemic. In total, 146 subjects hospitalized with influenza A(H1N1) pdm09 were identified from 2009-2011. There were 53 during the initial pandemic wave in the summ...

Journal: مهندسی دریا 2010
Amir Etemad-Shahidi, Mohammad Saeed Najafi,

Wave diffraction is a very important phenomenon in marine engineering and several models have been developed for its simulation. The new version of SWAN, a third generation spectral model, includes an approximation to wave diffraction. The approximation is based on the mild-slope equation for refraction and diffraction, omitting phase information. The objective this paper is to evaluate the per...

2016
Nizar Abcha

(i) To have more confidence in claims’ authors, it should be more useful to use frequency spectra of the surface elevation, namely to demonstrate quantitatively the period doubling and edge wave suppression. We have added a new Figure 3, where we show two frequency spectra. The first spectrum (Figure 3 a) is in absence of the breaking waves, where the first peak indicates the edge wave frequenc...

ژورنال: ژئوفیزیک ایران 2019

There are valuable investigations on the amplification effects of the topography on the seismic response in the frequency domain; however, a question is that how one can estimate the amplification of time domain peak ground acceleration (PGA), peak ground velocity (PGV), and peak ground displacement (PGD) over the topographic structures. In this study, the numerical approach has been used for t...

Journal: :Remote Sensing 2016
Giovanni Ludeno Carmelo Nasello Francesco Raffa Giuseppe Ciraolo Francesco Soldovieri Francesco Serafino

This paper deals with exploitation of the wave radar system for sea surface current estimation in a coastal zone. In particular, we present the results of the processing of the radar data collected by an X-band marine radar installed in Capo Granitola site, which is located in the south-west part of Sicily, on 15 May 2015. The effectiveness of the data processing is analyzed by comparing the wa...

Journal: :the journal of tehran university heart center 0
maryam esmaeilzadeh echocardiography research center, rajaie cardiovascular, medical and research center, iran university of medical sciences, tehran, iran. mohammadtaghi salehi-omran roohani hospital, babol university of medical sciences, babol, iran. majid maleki echocardiography research center, rajaie cardiovascular, medical and research center, iran university of medical sciences, tehran, iran. majid haghjoo echocardiography research center, rajaie cardiovascular, medical and research center, iran university of medical sciences, tehran, iran. feridoun noohi echocardiography research center, rajaie cardiovascular, medical and research center, iran university of medical sciences, tehran, iran. zahra ojaghi-haghighi echocardiography research center, rajaie cardiovascular, medical and research center, iran university of medical sciences, tehran, iran.

background: noninvasive techniques for the localization of the accessory pathways (aps) might help guide mapping procedures and ablation techniques. we sought to examine the diagnostic accuracy of strain imaging for the localization of the aps in wolff-parkinson-white syndrome. methods: w e prospectively studied 25 patients (mean age = 32 ± 17 years, 58.3% men) with evidence of pre-excitation o...

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