نتایج جستجو برای: core samples

تعداد نتایج: 627977  

1998
Chris Simpson

We investigate the recent claim by Qin et al. that the observed correlations (or lack thereof) between the core dominance parameter and the core and extended powers of samples of lobeand core-dominated quasars is in contradiction with beaming models. Contrary to their conclusion, we find that their results are in perfect agreement with such models, and support this assertion with Monte Carlo si...

2008
Tamy Boubekeur Christophe Schlick

(a) (b) (c) (d) Figure 1: (a) General framework for interactive out-of-core texturing. (b) Initial untextured out-of-core mesh (8M polygons). (c) Interactive texturing of an in-core point-sampled approximated geometry (150k samples). (d) Point-sampled texture applied on the initial full-size mesh.

Journal: :IEEE transactions on image processing : a publication of the IEEE Signal Processing Society 1999
Ali Bilgin Philip J. Sementilli Michael W. Marcellin

In this work, we present coding techniques that enable progressive transmission when trellis coded quantization (TCQ) is applied to wavelet coefficients. A method for approximately inverting TCQ in the absence of least significant bits is developed. Results are presented using different rate allocation strategies and different entropy coders. The proposed wavelet-TCQ coder yields excellent codi...

2009
Çagatay Dikici Christine Guillemot Caroline Fontaine Khalid Idrissi Atilla Baskurt

This paper considers the joint problem of dirty-paper and Wyner-Ziv coding with partial host information at the receiver. The rate-distortion and the capacity expressions have been derived for the Gaussian case. It is shown that the availability of the partial host information to the receiver has positive effects to the compression performance and the overall capacity. Moreover, a practical cod...

2002
E. Schuman George F. Vance

Concentrations of dissolved selenium (Se) as large as 330 pg L-' have been detected in water samples &om bacW aquifers in the southern Powder River Basin (PRB) of northeastern Wyoming. During d a c e coal mining, rock mstwial overiymg the coal is redistributed in relation to its original stratigraphic position; exposure of the prewiously buried material to surface oxidizing conditions decreases...

Journal: :فیزیک زمین و فضا 0
مریم روستایی دانش آموخته کارشناسی ارشد ژئوفیزیک، گروه فیزیک زمین، مؤسسة ژئوفیزیک دانشگاه تهران مجید نبی بیدهندی استاد، گروه فیزیک زمین، مؤسسة ژئوفیزیک دانشگاه تهران مهدی تدینی کارشناس ارشد ژئوفیزیک، شرکت ملی نفت ایران، تهران سیاوش ترابی دانشجوی دکتری ژئوفیزیک، گروه فیزیک زمین، مؤسسة ژئوفیزیک دانشگاه تهران

permeability is a property of porous medium that quantifies rock capacity to transmit fluids. frequently, core based permeability data are not available either because of the borehole conditions or due to the high cost of coring. for these reasons, over the years attempts have been made to estimate permeability by alternative ways. permeability is an elusive parameter in hydrocarbon reservoirs ...

Journal: :iranian journal of oil & gas science and technology 2012
sajjad gholinezhad mohsen masihi

the prediction of porosity is achieved by using available core and log data; however, the estimationof permeability is limited to the scare core data. hence, porosity and saturation data through theframework of flow units can be used to make an estimation of reservoir permeability. the purposeof this study is to predict the permeability of a carbonate gas reservoir by using physical-basedempiri...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زنجان - دانشکده مهندسی برق و الکترونیک 1390

جهت انتقال داده ها در شبکه های کنونی، به طور گسترده از شبکه های مبتنی بر ip استفاده می شود. عیب استفاده از این نوع شبکه ها این است که سرویس دهی به در خواست ها در آنها، بر اساس طبقه بندی داده ها صورت نمی گیرد. از طرف دیگر، تکنولوژی های سوییچینگ نظیر atm وframe relay این مزیت را دارند که کیفیت سرویس تضمین شده را همراه با یک تکنولوژی ارسال سریعتر داده فراهم می کنند. به منظور استفاده از مزایای هر ...

سبحانی, وحید, مظلوم, وحید,

Background[G1]  and Objective: Posterolateral hip musculature weakness and impaired knee joint proprioception can be seen in patients with patellofemoral pain syndrome (PFPS). The aim of this study was to investigate core muscle strength and dynamic balance in such patients and to compare them with healthy individuals. Materials and Methods: Thirty-two individuals (Mean ± SD: Age 25.3±3.9 yr...

In many reservoirs, after water flooding, a large volume of oil is still left behind. Hot water injection is the most basic type of thermal recovery which increase recovery by improved sweep efficiency and thermal expansion of crude.In the present work, the effects of injection rate and the temperature of the injected water were surveyed by using core flooding apparatus. Water flooding was perf...

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