Tools
Sorted by:
Try your query at:
 |
 |
 |
 |
 |
 |
Results 1 - 10
of
687
The relative performance of Bayesian and parsimony approaches when Sampling Characters . . .
, 2006
"... We tested whether it is beneficial for the accuracy of phylogenetic inference to sample characters that are evolving under different sets of parameters, using both Bayesian MCMC (Markov chain Monte Carlo) and parsimony approaches. We examined differential rates of evolution among characters, differe ..."
Abstract
-
Cited by 3 (0 self)
- Add to MetaCart
, differential character-state frequencies and character-state space, and differential relative branch lengths among characters. We also compared the relative performance of parsimony and Bayesian analyses by progressively incorporating more of these heterogeneous parameters and progressively increasing
Bayesian inference on phylogeny and its impact on evolutionary biology.
- Science
, 2001
"... 1 As a discipline, phylogenetics is becoming transformed by a flood of molecular data. These data allow broad questions to be asked about the history of life, but also present difficult statistical and computational problems. Bayesian inference of phylogeny brings a new perspective to a number of o ..."
Abstract
-
Cited by 235 (10 self)
- Add to MetaCart
)]. MCMC has revolutionized Bayesian inference, with recent applications to Bayesian phylogenetic inference (1-3) as well as many other problems in evolutionary biology (5-7). The basic idea is to construct a Markov chain that has as its state space the parameters of the statistical model and a stationary
Fast Regular Expression Matching using FPGAs
, 2001
"... This paper presents an efficient method for finding matches to a given regular expression in given text using FPGAs. To match a regular expression of length n, a serial machine requires O(2 ) memory and takes O(1) time per text character. The proposed approach requires only O(n 2) space and still pr ..."
Abstract
-
Cited by 191 (16 self)
- Add to MetaCart
This paper presents an efficient method for finding matches to a given regular expression in given text using FPGAs. To match a regular expression of length n, a serial machine requires O(2 ) memory and takes O(1) time per text character. The proposed approach requires only O(n 2) space and still
The emergence of classical properties through interaction with the environment. Zeitschrift fr Physik
- B
, 1985
"... The dependence of macroscoprc systems upor-r their environmertt is studied under the assumption that quantum theory is univcrsally valid. ln particular scattering of photons antl molecules turns out to be essential even in intergalactic space in restricting the observable properties by locally destr ..."
Abstract
-
Cited by 154 (3 self)
- Add to MetaCart
destroying tl.re corresponding phase relations. The remain ing coherence determines the 'c lass ical 'propert ies of the macroscopic systems ' ln this way iocal ciassical properties have their origin in the nonlocal character of quan-tum states. The effect of the interaction depends
Handwritten Character Recognition Using PCA of State Space Point Distribution
"... Abstract—In this paper, we investigate the utility of a feature set derived using the principles of non-linear dynamics applied to gray scale images for handwritten character recognition. The feature set is derived using the principles of non-linear dynamics from the state-space-map (SSM) generated ..."
Abstract
- Add to MetaCart
Abstract—In this paper, we investigate the utility of a feature set derived using the principles of non-linear dynamics applied to gray scale images for handwritten character recognition. The feature set is derived using the principles of non-linear dynamics from the state-space-map (SSM) generated
Tree Reconstruction From Multi-State Characters
- Advances in Applied Mathematics 28
, 2002
"... In evolutionary biology, a character is a function # from a set X of present-day species into a finite set of states. Suppose the species in X have evolved according to a bifurcating tree T . Biologists would like to use characters to infer this tree. Assume that # is the result of an evolution ..."
Abstract
-
Cited by 11 (6 self)
- Add to MetaCart
that T can be correctly reconstructed. We first establish lower bounds showing that, when the number of states is bounded, the number of homoplasy-free characters required to reconstruct T grows (at least) linearly with the size of X.In contrast, our main result shows that, when the state space is su
Geometry of Coherent States : Some Examples of Calculations of Chern Characters
"... First we make a brief review of coherent states and prove that the resolution of unity can be obtained by the 1–st Chern character of some bundle. Next we define a Grassmann manifold for a set of coherent states and construct the pull–back bundle making use of a projector from the parameter space to ..."
Abstract
-
Cited by 3 (3 self)
- Add to MetaCart
First we make a brief review of coherent states and prove that the resolution of unity can be obtained by the 1–st Chern character of some bundle. Next we define a Grassmann manifold for a set of coherent states and construct the pull–back bundle making use of a projector from the parameter space
Materials for an exploratory theory of the network society.
- The British Journal of Sociology
, 2000
"... ABSTRACT This article aims at proposing some elements for a grounded theor y of the network society. The network society is the social structure characteristic of the Information Age, as tentatively identi ed by empirical, cross-cultural investigation. It permeates most societies in the world, in v ..."
Abstract
-
Cited by 122 (0 self)
- Add to MetaCart
the construction of an analytical framework that could inform, and better organize, further research. However, given the dif culty of the task, and the necessarily collective character of this endeavour, what is presented here should be considered, literally, as materials to be used in the building of a
Geometry of Generalized Coherent States : Some Calculations of Chern Characters
"... This is a continuation of the preceding paper (hep–ph/0108219). First of all we make a brief review of generalized coherent states based on Lie algebra su(1,1) and prove that the resolution of unity can be obtained by the curvature form of some bundle. Next for a set of generalized coherent states w ..."
Abstract
-
Cited by 2 (2 self)
- Add to MetaCart
we define a universal bundle over the infinite–dimensional Grassmann manifold and construct the pull–back bundle making use of a projector from the parameter space to this Grassmann one. We mainly study Chern characters of these bundles. Although the Chern characters in the infinite–dimensional case
Continuity and discontinuity of behavioral inhibition and exuberance: Psychophysiological and behavioral influences across the first four years of life.
- Child Development,
, 2001
"... Abstract: Four-month-old infants were screened (N = 433) for temperamental patterns thought to predict behavioral inhibition, including motor reactivity and the expression of negative affect. Those selected (N = 153) were assessed at multiple age points across the first 4 years of life for behavior ..."
Abstract
-
Cited by 124 (47 self)
- Add to MetaCart
to specific affective states, Fox and his colleagues have found relations between EEG asymmetry and shyness in adults and reticence in children. Specifically, adults who rated themselves as high in shyness displayed right frontal EEG asymmetry The following study reports on two cohorts of infants, some
Results 1 - 10
of
687
