منابع مشابه
Comparing shapes, understanding evolution.
T he study of shape has intrigued some of the brightest minds of humanity, from Leonardo Da Vinci and Carl Friedrich Gauss to some of the top scientists of the modern era. The mathematics to analyze shapes are both beautiful and challenging, covering a variety of tools, from topology (1), to metric and differential geometry (2, 3), to statistics (4). The applications are very diverse and potent...
متن کاملRepresenting and comparing shapes using shape polynomials
We address the problem of multiresolution 2D and 3D shape representation. Shape is defined as a probability measure with compact support. Both object representations, typically sets of curves and/or surface patches, and observations, sets of scattered data, can be represented in this way. Global properties of shapes are defined as expectations (statistical averages) of certain functions. In par...
متن کاملDynamical evolution of bulge shapes
Figure rotation substantially increases the fraction of stochastic orbits in triaxial systems. This increase is most dramatic in systems with shallow cusps showing that it is not a direct consequence of scattering by a central density cusp or black hole. In a recent study of stationary triaxial potentials (Valluri & Merritt 1998) it was found that the most important elements that define the str...
متن کاملHow cognition shapes cognitive evolution
The tools we use shape the way we construct our world. When cognitive scientists began to model the evolution of cognition, one tool they found readily available was the genetic algorithm--a software system for artificially evolving solutions to problems that were specified by an explicit fitness function [1]. This fixed fitness function took a potential solution as input, and returned the good...
متن کاملThe Evolution of Social Cognition: Goal Familiarity Shapes Monkeys' Action Understanding
What is the evolutionary origin of the human ability to understand and predict the behavior of others? Recent studies suggest that human infants' early capacity for understanding others' goal-directed actions relies on nonmentalistic strategies [1-8]. However, there is no consensus about the nature of the mechanisms underpinning these strategies and their evolutionary history. Comparative studi...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2011
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1114928108