نتایج جستجو برای: wave velocity for applying avo technique

تعداد نتایج: 10629470  

2010
R. S. Wadhwa N. Ghosh Ch. Subba Rao

In situ shear wave velocity is one of the most important parameters for evaluating dynamic elastic moduli and needs special energy sources for generation and receivers for detection. Identification of shear wave phase on a seismic record needs skill as it is not the first wave to arrive and is usually embedded in surface waves. To estimate shear wave velocity for site characterization and for p...

Journal: :iranian journal of public health 0
suyan bian hongyang guo ping ye leiming luo hongmei wu wenkai xiao

background: both increased arterial stiffness and hyperuricaemia are associated with elevated cardiovascular risks. little is known about the relations of serum uric acid (ua) level to regional arterial stiffness and wave reflection. the aim of the study was to investigate the gender-specific association of serum ua and indices of arterial function in a community-based investigation in china. m...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تحصیلات تکمیلی علوم پایه زنجان - دانشکده فیزیک 1392

in the first part of this thesis we explored wetting and its dynamics for small droplets. first, we showed how a simple feature of water droplets on a surface, i.e. laplace pressure, can be exploited to build a micropump. we investigated capillary pumping in microchannels both experimentally and numerically. putting two droplets of different sizes at the in/outlet of a microchannel, will ge...

Anwar Hussain S. Nadeem Safia Akram,,

This paper describes the effects of induced magnetic field and partial slip on the peristaltic flow of a couple stress fluids in an asymmetric channel. The two dimensional equation of couple stress fluid are simplified by making the assumptions of long wave length and low Reynolds number. The exact solutions of reduced momentum equation and magnetic force function have been computed in wave...

Journal: :Journal of biomechanics 2016
Ricardo J Andrade Antoine Nordez François Hug Filiz Ates Michel W Coppieters Pedro Pezarat-Correia Sandro R Freitas

Peripheral nerves are exposed to mechanical stress during movement. However the in vivo mechanical properties of nerves remain largely unexplored. The primary aim of this study was to characterize the effect of passive dorsiflexion on sciatic nerve shear wave velocity (an index of stiffness) when the knee was in 90° flexion (knee 90°) or extended (knee 180°). The secondary aim was to determine ...

Fereydoun Sahabi Gholam Hossain Norouzi, Roohollah Parvizi

AVO as a known methodology is used to identify fluid type and reservoir lithology in subsurface exploration. Method discussed in this paper, consists of three stages, including: Direct modeling, Inverse modeling and Cross plot interpretation. By direct modeling we can clarify lithology or fluid dependent attributes. Analysis performed using both P-P and P-Sv attributes. Inverse modeling deals w...

2007
Grigol Gogoberidze Stefaan Poedts

The possibility of velocity shear-induced linear transformations of different magnetohydrodynamic waves in the solar wind is studied both analytically and numerically. A quantitative analysis of the wave transformation processes for all possible plasma-β regimes is performed. By applying the obtained criteria for effective wave coupling to the solar wind parameters, we show that velocity sheari...

ژورنال: :پژوهش نفت 0
صادق رحیم بختیاری دانشکده مهندسی معدن، دانشگاه صنعتی سهند تبریز احسان فرح بخش دانشکده مهندسی معدن، پردیس دانشکده های فنی، دانشگاه تهران رسول حمیدزاده مقدم دانشکده مهندسی معدن، دانشگاه صنعتی سهند تبریز

نتایج بررسی تغییرات دامنه بازتاب امواج لرزه ای در برابر دورافت می تواند در استخراج خصوصیات کشسانی و در نتیجه تعیین سنگ شناسی و محتوای سیالی مخازن در صنعت نفت به کار رود. یکی از روش های مطالعه کمی داده های لرزه ای، تحلیل avo می باشد که بر روی داده های پیش بر انبارش صورت می گیرد. پیش از انجام مطالعات تحلیلی avo باید از صحت مراحل پردازش اطمینان حاصل شود، به طوری که تغییرات دامنه بازتاب تنها مربوط ...

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