4.1 Common projection schemes A projection method can be viewed as application of a “lossy” compression to a system’s state, and re-writing equations for the state’s dynamics in terms of a compressed representation. Depending on a system and model class (linear vs. non-linear, state-space vs. input/output, time-varying vs. time-invariant, etc.), different implementations of this approach become...

in this study, the stability problem of a circular orthotropic cylindrical shell under the effect of anaxial compression varying with a power function of time is considered. at first, the modified donnell typedynamic stability and compatibility equations are obtained using love’s shell theory. applying the galerkinmethod and rayleigh-ritz variational techniques to these equations and taking the...

An image consists of large data and requires more space in the memory. The large data results in more transmission time from transmitter to receiver. The time consumption can be reduced by using data compression techniques. In this technique, it is possible to eliminate the redundant data contained in an image. The compressed image requires less memory space and less time to transmit in the for...

A practical scheme for maintaining an index for a sliding window in optimal time and space, by use of a suffix tree, is presented. The index supports location of the longest matching substring in time proportional to the length of the match. The total time for build and update operations is proportional to the size of the input. The algorithm, which is simple and straightforward, is presented i...

Wavelet transformation is one of the most practical mathematical transformations in the field of image processing, especially image and signal processing. Depending on the nature of the multiresolution analysis, Wavelet transformation become more accessible and powerful tools. In this paper, we refer to the mathematical foundations of this transformation.   Introduction: The...

Current spaceborne NASA hyperspectral imaging instruments either avoid onboard compression or make use of only limited lossless image compression techniques during transmission. For example, the current state-of-practice for low-complexity space-qualified lossless compression hardware is to use the Universal Source Encoder for Space (USES) chip [1]. The USES chip implements the onedimensional R...