Selecting appropriate environmental variables is a key step in ecology. Terrain attributes (e.g. slope, rugosity) are routinely used as abiotic surrogates of species distribution and to produce habitat maps that can be used in decision-making for conservation or management. Selecting appropriate terrain attributes for ecological studies may be a challenging process that can lead users to select...

BACKGROUND For visualizing large-scale biochemical network maps, it is important to calculate the coordinates of molecular nodes quickly and to enhance the understanding or traceability of them. The grid layout is effective in drawing compact, orderly, balanced network maps with node label spaces, but existing grid layout algorithms often require a high computational cost because they have to c...

This paper studies the reliance of a Gaussian Mixture Model (GMM) based closed-set Speaker Identification system on model convergence and describes methods to improve this convergence. It shows that the reason why the Vector Quantisation GMMs (VQGMMs) outperform a simple GMM is mainly due to decreasing the complexity of the data during training. In addition, it is shown that the VQGMM system is...

We show that equilibria derived for certain multi-period nonatomic games (NGs) can be used by their large finite counterparts to achieve near-equilibrium performances. In these games, the evolution of a player’s state is influenced by his own action as well as other players’ states and actions. Also, both random state transitions and players’ random actions are driven by independently generated...

In this paper a hazard detection and landing site selection algorithm, based on a single, visible light, camera acquisition, processed by Artificial Neural Networks (ANNs), is presented. The system is sufficiently light to run onboard a spacecraft during the landing phase of a planetary exploration mission. Unsafe terrain items are detected and arranged in a hazard map, exploited to select the ...

This paper discusses quantitative evaluation of information in remote sensing and GIS data. The formula for calculating information contents of remote sensing imagery are developed, taking into account of signal-noise-ratio (SNR), inter-pixel and cross-band correlations, while information amounts in GIS data are calculated by referring to geometric position, attributes, and the equivocation in ...

Methods of deformable appearance models are useful for realistically modelling shapes and textures of visual objects for reconstruction. A first application can be the fine analysis of face gestures and expressions from videos, as deformable appearance models make it possible to automatically and robustly locate several points of interest in face images. That opens development prospects of tech...

Creating realistic models and animations of human faces with adequate level of detail is very challenging due to the high complexity of facial deformations and the sensitivity of the human visual system to human faces. One way to overcome this challenge is using face scans captured from real facial performances. However, capturing the required level of detail is only possible with high-end syst...

In this paper, a reduced complexity Log-MAP algorithm based on a non-recursive approximation of the max∗ operator is presented and studied for turbo trellis-coded modulation (TTCM) systems. In the algorithm, denoted as AvN Log-MAP, the max∗ operation is generalized and performed on n ≥ 2 arguments. The approximation is derived from the Jensen inequality. The non-recursive form of the max∗ calcu...