نتایج جستجو برای: time frequency domain

تعداد نتایج: 2571320  

Journal: :Journal of Synchrotron Radiation 2015

Journal: :International Journal of Computer Applications 2013

Fereidoun Nowshiravan-Rahatabad, Omid Khayat,

Purpose: The aim of this study was to characterize prolonged standing and its effect on postural control in elderly individuals in comparison to adults.Materials and Methods: The elderly individuals’ behavior during standing and how demanding such a task is for them, is still unknown. We recorded the center of pressure (COP) position of 12 elder and 15 young participants while they were standin...

Journal: :فیزیک زمین و فضا 0
ایمان گنجی دانشجوی دکتری ژئوفیزیک، گروه ژئوفیزیک، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات حمیدرضا سیاهکوهی دانشیار، گروه فیزیک زمین، مؤسسة ژئوفیزیک دانشگاه

seismic waves travelling through inelastic media are attenuated by the conversion of elastic energy into heat. upon being attenuated, the travelling wave changes: amplitude is reduced, travelling waveform is modified due to high-frequency content absorption, and phase is delayed. attenuation is usually quantified through the quality factor q: the ratio between the energy stored and lost in each...

Journal: :Processes 2021

The prediction of epileptic seizures is crucial to aid patients in gaining early warning and taking effective intervention. Several features have been explored predict the onset via electroencephalography signals, which are typically non-stationary, dynamic, varying from person-to-person. In former literature, applied classification shared similar contributions all patients. Therefore, this pap...

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