نتایج جستجو برای: dynamic magnification factors

تعداد نتایج: 1465648  

2008
Fion C. H. Lee Alan H. S. Chan

The variable visual acuity nature of human vision across fovea and periphery prompted the need to study the differential magnification method as compared with the traditional linear magnification. With differential magnification, outer-area objects were magnified at a level higher than the inner-area objects. An application software was specially developed by the authors previously for the exam...

2007
M. S. T. Carpendale M. Tigges D. J. Cowperthwaite F. D. Fracchia

Some recent developments in the area of multi-scale viewing have concerned the creation of such views from magnification factors as input. We present an algorithm in which magnification factors are used directly to control the creation of a multiscale view in a 3D based distortion viewing. Our algorithm relies on the basic geometry of a perspective view volume, the properties of which provide a...

1997
Christopher M. Bishop Markus Svensén Christopher K. I. Williams

The Generative Topographic Mapping (GTM) algorithm of Bishop, Svensén, and Williams (1998) has been introduced as a principled alternative to the SelfOrganizing Map (SOM). As well as avoiding a number of deficiencies in the SOM, the GTM algorithm has the key property that the smoothness properties of the model are decoupled from the reference vectors, and are described by a continuous mapping f...

Journal: :Neuron 2003
Robert O. Duncan Geoffrey M. Boynton

We measured linear cortical magnification factors in V1 with fMRI, and we measured visual acuity (Vernier and grating) in the same observers. The cortical representation of both Vernier and grating acuity thresholds in V1 was found to be roughly constant across all eccentricities. We also found a within-observer correlation between cortical magnification and Vernier acuity, further supporting c...

This study is investigated the optimum parameters for a tuned mass damper (TMD) under the seismic excitation. Shuffled complex evolution (SCE) is a meta-heuristic optimization method which is used to find the optimum damping and tuning frequency ratio for a TMD. The efficiency of the TMD is evaluated by decreasing the structural displacement dynamic magnification factor (DDMF) and acceleration ...

2004
Gham Hur Yoon Joon Hwang Soon Joo Cha Yong Hoon Kim

Purpose: To determine whether magnified digital mammography using a computed radiography system can produce better spatial resolution by reducing the focus-object distance, and to define the optimal magnification factor when a large x-ray tube focal spot is used for digital mammography using a CR system. Materials and Methods: Digital images obtained using computed radiography of a breast phant...

Journal: :Advances in Water Resources 2021

Abstract Detection and attribution of trends in individual at-site series hydrological extremes is routinely undertaken using simple linear regression-based models. However, the available records are often too short to allow a consistent assessment across different stations region. The theoretical developments presented this paper propose new method for estimating regional regression slope para...

Journal: :International Journal Of Engineering & Applied Sciences 2014

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