منابع مشابه
Optimal encoding of non-stationary sources
The usual assumption for proofs of the optimality of lossless encoding is a stationary ergodic source. Dynamic sources with non-stationary probability distributions occur in many practical situations where the data source is formed from a composition of distinct sources, for example, a document with multiple authors, a multimedia document, or the composition of distinct packets sent over a comm...
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The goal of environmental regulation is to protect public health by reducing the presence of certain pollutants. The health and environmental damages caused by a specific concentration of a given pollutant in a given location at a given point in time are the same regardless of its source. For political and practical reasons, however, environmental regulations have treated point source polluters...
متن کاملCSEM WP 181 Sacred Cars? Optimal Regulation of Stationary and Non-stationary Pollution Sources
For political and practical reasons, environmental regulations sometimes treat point source polluters, such as power plants, di¤erently from mobile source polluters, such as vehicles. This paper measures the extent of this regulatory asymmetry in the case of nitrogen oxides (NOx), the criteria air pollutant that has proven to be the most recalcitrant in the United States. We nd signi cant di¤e...
متن کاملBlind Separation of Jointly Stationary Correlated Sources
The separation of unobserved sources from mixed observed data is a fundamental signal processing problem. Most of the proposed techniques for solving this problem rely on independence or at least uncorrelation assumption for source signals. This paper introduces a technique for cases that source signals are correlated with each other. The method uses Wold decomposition principle for extracting ...
متن کاملSeparation of Non Stationary Sources; Achievable Performance
We consider the blind separation of an instantaneous mixture of non stationary source signals, possibly normally distributed. The asymptotic Cramér-Rao bound is exhibited in the case of known source distributions: it reveals how non stationarity and non Gaussianity jointly governs the achievable performance via an index of non stationarity and an index of non Gaussianity.
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ژورنال
عنوان ژورنال: Information Sciences
سال: 2001
ISSN: 0020-0255
DOI: 10.1016/s0020-0255(01)00103-7