نتایج جستجو برای: spatially variability
تعداد نتایج: 226288 فیلتر نتایج به سال:
A range of parameters thought to contribute to intra-specific variation in mercury levels were investigated using the feathers and blood of adult great skuas Catharacta skua from 2 northeast Atlantic colonies as sampling units. Different feather types and blood were taken to represent intake over different temporal scales Mercury concentrations and stable isotope signatures of these tissues wer...
Precision agriculture data consisting of crop yield and topographic features are examined with the objective of explaining yield variability as a function of topographic attributes in order to extrapolate this knowledge to unseen agricultural sites. It is demonstrated that random data partitioning into training, validation and test subsets is not appropriate when dealing with agricultural probl...
We have calculated the Tsallis entropy and Fisher information matrix (entropy) of spatially correlated nonextensive systems, by using an analytic non-Gaussian distribution obtained by the maximum entropy method. The effects of the correlated variability on the Fisher information matrix are shown to be different from those on the Tsallis entropy. The Fisher information is increased (decreased) b...
Traditionally, deep-sea ecosystems have been considered to be insulated from the effects of modern climate change, but with recognition importance food supply surface ocean and currents sustaining these systems, potential for rapid response benthic systems change is gaining increasing attention. However, very few ecological time-series exist deep covering twentieth century. Benthic responses pa...
Over the last decade, emergence and significant growth of home-sharing platforms, such as Airbnb, has coincided with rising housing unaffordability in many global cities. It is this context that we look to empirically assess impact Airbnb on prices Sydney—one least affordable cities world. Employing a hedonic property valuation model, our results indicate Airbnb’s overall effect positive. A 1% ...
This paper, the first in a series of two, applies the entropy (or information) theory to describe the spatial variability of synthetic data that can represent spatially correlated groundwater quality data. The application involves calculating information measures such as transinformation, the information transfer index and the correlation coefficient. These measures are calculated using discret...
The study was conducted to evaluate hydraulic conductivity functions in relation to some soil chemical properties in an oxisols of the tropics. Field and laboratory studies were carried out and data collected, subjected to statistical analytical procedure for computing coefficient of variability and correlation among soil properties. Results of the study showed that hydraulic conductivity funct...
Functional magnetic resonance imaging (fMRI) research often attributes blood oxygen level-dependent (BOLD) signal variance to measurement-related confounds. However, what is typically considered "noise" variance in data may be a vital feature of brain function. We examined fMRI signal variability during fixation baseline periods, and then compared SD- and mean-based spatial patterns and their r...
In this paper we derive a probabilistic model for recognition based on local descriptors and spatial relations between these descriptors. Our model takes into account the variability of local descriptors, their saliency as well as the probability of spatial conngura-tions. It is structured to clearly separate the probability of point-wise correspondences from the spatial coherence of sets of co...
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