نتایج جستجو برای: linear inversion procedure

تعداد نتایج: 1106266  

Journal: :فیزیک زمین و فضا 0
b habibian dehkordi department of earth physics, institute of geophysics, university of tehran, iran b oskooi department of earth physics, institute of geophysics, university of tehran, iran

the main goal of the present study is to identify characteristics of the inter-station horizontal magnetic responses and the vertical magnetic data, as two types of magnetotelluric transfer functions, in the modeling procedure. through consideration of model responses and two-dimensional inversion of synthetic data, sensitivity of the data components in detecting different geophysical structure...

Journal: :IACR Cryptology ePrint Archive 2015
Jeremy Maitin-Shepard

Field inversion in F2m dominates the cost of modern software implementations of certain elliptic curve cryptographic operations, such as point encoding/hashing into elliptic curves. [7, 6, 2] Itoh–Tsujii inversion using a polynomial basis and precomputed table-based multi-squaring has been demonstrated to be highly effective for software implementations [19, 14, 2], but the performance and memo...

1998
Lam Hui

We propose a method for recovering the shape of the mass power spectrum on large scales from the transmission fluctuations of the Lyman-alpha forest, which takes into account directly redshift-space distortions. The procedure, in discretized form, involves the inversion of a triangular matrix which projects the mass power spectrum in 3-D real-space to the transmission power spectrum in 1-D reds...

Journal: :فیزیک زمین و فضا 0
عسل رحیمی زینال دانشجوی کارشناسی ارشد ژئوفیزیک، گروه فیزیک زمین، مؤسسة ژئوفیزیک دانشگاه تهران، ایران محمدعلی ریاحی دانشیار، گروه فیزیک زمین، مؤسسة ژئوفیزیک دانشگاه تهران، ایران

this paper describes a methodology for the integration of well logs and a series of grid-based attributes extracted from interpreted seismic data for prediction of porosity distributions. the studied area is located in the southwest iran. before finding a relationship between the target logs and predicted logs from 3d seismic data, we have interpreted the 3d seismic data in the studied area. al...

2003
Vasco Brattka

Given a program of a linear bounded and bijective operator T , does there exist a program for the inverse operator T−1? And if this is the case, does there exist a general algorithm to transfer a program of T into a program of T−1? This is the inversion problem for computable linear operators on Banach spaces in its non-uniform and uniform formulation, respectively. We study this problem from t...

2004
B. L. N. Kennett

S U M M A R Y A disadvantage of fully non-linear methods of inversion, through exploitation of the properties of model space, is the absence of a well-developed framework for error assessment. To rectify this problem an auxiliary weighting function for ensemble properties is introduced that can be used with suitable thresholds to define consistency regions of suitable models. This approach requ...

Journal: :Biometrics 2002
Wensheng Guo

In this article, a new class of functional models in which smoothing splines are used to model fixed effects as well as random effects is introduced. The linear mixed effects models are extended to nonparametric mixed effects models by introducing functional random effects, which are modeled as realizations of zero-mean stochastic processes. The fixed functional effects and the random functiona...

2008

Weight reduction is becoming increasingly important in products that undergo cyclic loading, such as cars, aeroplanes, wind turbines, etc. The novelty of these dramatic design changes will cause material fatigue to become one of the key design drivers in the development of cars, aeroplanes, wind turbines and require tools to accurately predict the life time of a construction. The life time can ...

1999
Pierre COMON Olivier GRELLIER

Static linear mixtures with fewer sensors than sources are considered They are encountered for instance in downlink radio communications if the spectral e ciency is attempted to be improved The blind source extraction problem is addressed by forming virtual sen sor measurements in order to make it possible to invert linearly the observation model Virtual measurements are a non linear function o...

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