نتایج جستجو برای: space model

تعداد نتایج: 2488565  

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 1995

صالحی, طیبه, علوی, سید علی‌اصغر,

First, singlet dark matter annihilation into pair charged fermions and pair  bosons was studied to the first order of non-commutativity parameter in perturbative model. Our results are different from the results reported in some previous studies. Then the problem is formulated in -exact non-commutative space-time and non-perturbative model, then the exact results are presented

2016
Mark L. Taper José M. Ponciano

A reviewer of the manuscript challenged us to do two things. First, to move beyond simple likelihood ratio examples and show how evidential ideas are used in the practice of science. And, second to solve some deep problem in ecology using this framework. To answer the first challenge, we discuss information criteria differences as a natural extension of the likelihood ratio that overcomes many ...

Introdution: The aim of this study was to evaluate and benchmark EGSnrc code in the simulation of 18 MV photon beam produced by Siemens Oncor® linear accelerator. Methods: This study was conducted in a comparative and simulation based on experience method. The Beamnrc code was used to model the accelerator head and generate phase space files. The phase space files were obtained with the fo...

2012
Charles H. Smith Megan Derr

In this analysis natural systems are posed to subsystemize in a manner facilitating both structured information/energy sharing and an entropy maximization process projecting a three-dimensional, spatial, outcome. Numerical simulations were first carried out to determine whether n × n input-output matrices could, once entropy-maximized, project a three-dimensional Euclidean metric. Only 4 × 4 ma...

Journal: :نشریه دانشکده فنی 0
مصطفی تقوی مرکز تحقیقات سیاست علمی کشور سیده پریسا موسوی طباطبایی مطالعات علم و فنّاوری دانشگاه وبرجینیا تک

design process is one of the main processes practiced in engineering. in this paper, after demonstrating the place of engineering among the topics discussed about technology, design process is studied from the perspective of three different models. the first model, vincenti’s model, provides an abstract explanation of the design process; the second model, bucciarelli’s model, has a sociological...

2005
Huazhong Wang Guojian Shan

Under operator, matrix and inverse theory, seismic-wave imaging can be considered a unified process—mapping from data space to model space. The main topics in seismic-wave imaging include (1) seismic-data interpolation, regularization and redatuming, which mainly decrease the imaging noise; (2) seismic-wave illumination analysis, which predicts whether a target reflector can be imaged and evalu...

2001
James Rickett

Illumination problems caused by finite-recording aperture and lateral velocity lensing can lead to amplitude fluctuations in migrated images. I calculate both model and data-space weighting functions that compensate for these illumination problems in recursive depth migration results based on downward-contination. These weighting functions can either be applied directly with migration to mitiga...

Journal: :CoRR 2017
Barathi Ganesh H. B. M. Anand Kumar K. P. Soman

In this era of digitization, knowing the user’s sociolect aspects have become essential features to build the user specific recommendation systems. These sociolect aspects could be found by mining the user’s language sharing in the form of text in social media and reviews. This paper describes about the experiment that was performed in PAN Author Profiling 2017 shared task. The objective of the...

2012
Chunlin Tang Xuegang Wang

Abstract The performance of Space-Based Radar (SBR) to detect air or ground moving targets is influenced by earth clutter, so an effective algorithm to suppressing clutter can be designed if knowing the power and distribution of earth clutter. In this paper, the clutter model of SBR is deduced. Besides, the earth's rotation effect is taken into account and the modification to Doppler frequency ...

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