نتایج جستجو برای: spectral decomposition

تعداد نتایج: 258739  

Journal: :ACM Transactions on Graphics 2020

Journal: :iranian journal of radiology 0
yanhong xu department of radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china an xiao department of interventional radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china jia yang department of radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china zaixian zhang department of radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china guixiang zhang department of radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china; department of radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china. tel: +86-2163240090, fax: +86-2163240825

conclusion the study data highlighted good value of iodine-based material decomposition images of spectral ct in assessment of both lipiodol deposition and residual cancer for follow-up of hcc patients previously treated with tace. background it is critical to follow up hepatocellular carcinoma (hcc) after transcatheter arterial chemoembolization (tace) in clinical practice. computed tomography...

2017
Jiajun Han Brian Russell

Spectral decomposition is a powerful analysis tool used to identify the frequency content of seismic data. Many spectral decomposition techniques have been developed, each with their own advantages and disadvantages. The basis pursuit technique produces a high time frequency resolution map through formulating the problem as an inversion scheme. This techniques differs from conventional spectral...

2013
Kiran Khonde Richa Rastogi

This paper presents a review of spectral decomposition of seismic data, since it's inception nearly in 1997. It discusses various techniques and applications of spectral decomposition in seismic data processing and interpretation. It is also known as timefrequency analysis consists of transforming non stationary signal in time/space from time/space domain to time/space vs frequency domain. The ...

Journal: :فیزیک زمین و فضا 0
مهدی صادقی دانشجوی کارشناسی ارشد ژئوفیزیک (لرزه شناسی)، دانشگاه صنعتی شاهرود، ایران امین روشندل کاهو استادیار، دانشکده معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، ایران حمیدرضا سیاه کوهی استاد، گروه فیزیک زمین، موسسه ژئوفیزیک دانشگاه تهران، ایران علیرضا حیدریان دانشجوی دکتری ژئوفیزیک، موسسه ژئوفیزیک، دانشگاه تهران، ایران

spectral decomposition of time series has a significant role in seismic data processing and interpretation. since the earth acts as a low-pass filter, it changes frequency content of passing seismic waves. conventional representing methods of signals in time domain and frequency domain cannot show time and frequency information simultaneously. time-frequency transforms upgraded spectral decompo...

Journal: :Journal of Geophysics and Engineering 2019

Journal: :Journal of High Energy Physics 2012

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