نتایج جستجو برای: some tf seismic attributes are extracted the attributes include instantaneous amplitude

تعداد نتایج: 16303530  

2013
Sergey Fomel

Local seismic attributes measure seismic signal characteristics not instantaneously at each signal point and not globally across a data window but locally in the neighborhood of each point. I define local attributes with the help of regularized inversion and demonstrate their usefulness for measuring local frequencies of seismic signals and local similarity between different datasets. I use sha...

Journal: :پژوهش های قرآن و حدیث 0
معصومه مرزبان دانشجوی دکتری علوم قرآن و حدیث، دانشگاه علامۀ طباطبایی. مهدی احمدی استادیار گروه علوم قرآن و حدیث دانشگاه شیراز

the research argues that the ending divine attributes of the quranic verses are related semantically to the verses’ theme. according to the content of the quranic verses, supported by some commentators, the ending divine attributes of the verses have such a deep semantic relationship with the verse content that if we abandon the ending attributes, some disorder is made in the verse theme. this ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1374

we have devided the thesis in to five chapters. the first recollects facts from purely algebraic theory of jordan algebras and also basic properties of jb and jb* - algebras which are needed in the sequel. in the second chapter we extend to jb* - algebras, a classical result due to cleveland [8]. this result shows shows the weakness of jb* - norm topology on a jb* - algebera. in chapter three, ...

2004
Richard Baraniuk Mark Coates Philippe Steeghs

We present an efficient method for robustly calculating time-frequency attributes of a signal, including instantaneous mean frequency, bandwidth, and kurtosis. Most current approaches involve a costly intermediate step of computing a (highly oversampled) 2-d bilinear time-frequency representation (TFR), which is then collapsed to the I-d attribute. Using the principles of hybrid linearhilinear ...

Journal: :Computers & Geosciences 2013
Christoph Georg Eichkitz Johannes Amtmann Marcellus Gregor Schreilechner

Seismic interpretation can be supported by seismic attribute analysis. Common seismic attributes use mathematical relationships based on the geometry and the physical properties of the subsurface to reveal features of interest. But they are mostly not capable of describing the spatial arrangement of depositional facies or reservoir properties. Textural attributes such as the grey level co-occur...

2012
ALI C. BAKIR ROBERT L. NOWACK

Using seismic data from regional earthquakes in Tibet recorded by the Hi-CLIMB experiment, Pn attributes are used to constrain the velocity gradient and attenuation structure of the Tibetan lithosphere under the Hi-CLIMB array. Numerical modeling is performed using the spectral-element method (SEM) for laterally varying upper-mantle velocity and attenuation, and the seismic attributes considere...

Purpose: Library websites are valuable resources for the dissemination of information and provide easy access to scientific resources for users. In this study in which the websites of Iranian public libraries are compared with some public library websites from other countries we try to clarify the viewpoints of librarians regarding the importance of high frequent attributes of the websites. Me...

2017
Motaz Alfarraj Haibin Di Ghassan AlRegib

In this abstract, we propose a multiscale fusion technique to enhance seismic geometric attributes, such as dip and curvature, which are very sensitive to noise present in seismic data. For a give seismic section, first, we construct a Gaussian pyramid that allows us to generate the seismic attribute at different resolutions (scales). Then, all attributes at the different scales are fused toget...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و زبانهای خارجی 1390

the frame semantic theory is a nascent approach in the area of translation studies which goes beyond the linguistic barriers and helps us to incorporate cognitive and cultural factors to the study of translation. based on rojos analytical model (2002b), which centered in the frames or knowledge structures activated in the text, the present research explores the various translation problems that...

2015
Jianhua Cao Yang Yue Kunyu Zhang Jucheng Yang Xiankun Zhang

Color is the critical factor in seismic data interpretation and geological targets visualization. And recently, ideas of color blending have brought the enlightenment in attribute combinations for reservoir characterization in petroleum engineering. In this paper, we present this approach of color blending in different color modes and its application in subsurface channel detection by using sei...

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