For the improvement of the ability in detecting small calcifications using Ultrasonography (US) we propose a novel indicator of calcifications in an ultrasound B-mode image without decrease in frame rate. Since the waveform of an ultrasound pulse changes at a calcification position, the decorrelation of adjacent scan lines occurs behind a calcification. Therefore, we employ the decorrelation of...

Direction of arrival estimation in coherent multipath environment by using the superresolution technique often requires decorrelation techniques. Spatial smoothing preprocessings are the most popular scheme as the techniques. In mobile environment, position change of the target/transmitter often brings us decorrelation effect. Multiple transmitting signals by an antenna array like a MIMO transm...

XQuery, the defacto XML query language, is typically composed of highly nested expressions. Iterative execution of such expressions tends to be intuitive but inefficient. Instead, decorrelation of nested XQuery expressions opens up the opportunity for significant query optimization. Although several algorithms have been proposed to optimize nested XQueries, these works pay little attention to t...

In this paper we present and compare two different spatio-temporal decorrelation learning algorithms for updating the weights of a linear feedforward network with FIR synapses (MIMO FIR filter). Both standard gradient and the natural gradient are employed to derive the spatio-temporal decorrelation algorithms. These two algorithms are applied to multichannel blind deconvolution task and their p...

The introduction of the Global Positioning System (GPS) ushered in a new era of affordable precise navigation. Differential GPS (DGPS) corrections have reduced positioning errors from about 100 meters to roughly 1 meter, which has led to their proposed use in aircraft precision approach. However, the accuracy of differential corrections is somewhat limited by spatial and temporal decorrelation ...

Proof: Consider a source v with a hop-count η = |p(v, u)| to the destination u. Nodes in p(v, u) randomly select their transmission times within an interval T . Let the randomly selected transmission times be denoted by t1, t2, . . . , tη. We compute the average number of hops (H) traversed over T by a packet m originating at v1, using a combinatorial approach. The value of H depends on the arr...

The authors investigate whether data representing medical image sequences can be compressed more efficiently by taking into account the temporal correlation between the sequence frames. The standard of comparison is intraframe HINT, the best-known reversible decorrelation method for 2-D images. In interframe decorrelation, a distinction is made between extrapolation- and interpolation-based met...