نتایج جستجو برای: geometrical method

تعداد نتایج: 1651412  

2009
Bo Li John Lowengrub Andreas Rätz Axel Voigt

Geometrical evolution laws are widely used in continuum modeling of surface and interface motion in materials science. In this article, we first give a brief review of various kinds of geometrical evolution laws and their variational derivations, with an emphasis on strong anisotropy. We then survey some of the finite element based numerical methods for simulating the motion of interfaces focus...

In this paper, the non-linear dynamic response of rectangular atomic force microscopy in tapping mode is considered. The effect of cantilever’s geometrical parameters (e.g., cantilever length, width, thickness, tip length and the angle between the cantilever and the sample's surface in liquid environment has been studied by taking into account the interaction forces. Results indicate that the r...

1975
V. Gallo

T h e o r g a n i z a t i o n o f a p r o g r a m f o r l i n g u i s t i c a n a l y s i s o f g e o m e t r i c a l p a t t e r n s i s d e s c r i b e d . T h e p r o g r a m b e l o n g s t o t h e s y s t e m o f p a t t e r n r e c o g n i t i o n f o r i n d u s t r i a l d r a w i n g s a n d o b j e c t s [ 1 , 2 , 7 ] W e s t a r t e d f r o m t h e f o r m a l i s m s u g g e s t e d...

Journal: :iranian journal of medical physics 0
payam samadi miandoab department of electrical and computer engineering, medical radiation group, graduate university of advanced technology, haft bagh highway, knowledge paradise, kerman, iran. ahmad esmaili torshabi department of electrical and computer engineering, medical radiation group, graduate university of advanced technology, haft bagh highway, knowledge paradise, kerman, iran. saber nankali department of electrical and computer engineering, medical radiation group, graduate university of advanced technology, haft bagh highway, knowledge paradise, kerman, iran. mohammad reza rezaie department of electrical and computer engineering, medical radiation group, graduate university of advanced technology, haft bagh highway, knowledge paradise, kerman, iran.

introduction patient set-up optimization is required in radiotherapy to fill the accuracy gap between personalized treatment planning and uncertainties in the irradiation set-up. in this study, we aimed to develop a new method based on neural network to estimate patient geometrical setup using 4-dimensional (4d) xcat anthropomorphic phantom. materials and methods to access 4d modeling of motion...

2014
Nikola VITKOVIĆ Jelena MILOVANOVIĆ Miroslav TRAJANOVIĆ Nikola KORUNOVIĆ Miloš STOJKOVIĆ Aleksandra Medvedeva

Primljeno (Received): 2011-10-10 Prihvaćeno (Accepted): 2012-02-28 Original scientific paper In today's medicine, especially in the field of orthopedic surgery, it is very important to use geometrically accurate and anatomically correct geometrical models of human bones for the pre-operative planning and implants creation. In order to create such models, two new methods for geometrical modeling...

2010
Khairy Elsayed Chris Lacor

A Response surface design of experiment has been performed based on the Muschelknautz method of modeling (MM) for 64 test cases using Box-Behnken design to study the effect of seven geometrical cyclone dimensions on the pressure drop and cut-off diameter. It is found that the most significant geometrical parameters are, the vortex finder diameter, the inlet section width and height, and the cyc...

2017
Gaël Ecorchard Reimund Neugebauer Patrick Maurine

Redundantly actuated Parallel Kinematic Machines (PKMs) offer a number of advantages compared to classical non-redundant PKMs. Particularly, they show a better stiffness thanks to singularity avoidance and they have an improved repeatability due to a better behavior against backlashes. The main problem with the calibration of these machines is that the redundancy leads to some mechanical strain...

Journal: :CoRR 2003
Lili Ma Yangquan Chen Kevin L. Moore

The commonly used radial distortion model for camera calibration is in fact an assumption or a restriction. In practice, camera distortion could happen in a general geometrical manner that is not limited to the radial sense. This paper proposes a simplified geometrical distortion modeling method by using two different radial distortion functions in the two image axes. A family of simplified geo...

Journal: :research in pharmaceutical sciences 0
r sabet a fassihi b moeinifard

quantitative structure-activity relationship (qsar) studies of a series of substituted 3-hydroxy-pyridine-4-ones and 3-hydroxy-pyran-4-ones as antibacterial and antifungal agents against a variety of microorganisms were performed. multiple linear regression approach was used as variable selection method. the antimicrobial activities of these compounds against staphylococcus aureus, aspergilus n...

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