spectral decomposition is a powerful tool for analysis of seismic data. fourier transform determines the frequency contents of a signal. but for analysis of non-stationary signals, 1-d transform to frequency domain is not sufficient. in early years, transforming of seismic traces into time and frequency domain was done via windowed fourier transform, called a short time fourier transform (stft)...

in today's dynamic and uncertain environment, knowledge is a strategic source for organizations to gain the competitive advantage and innovation. in this research, we have investigated mediating role of knowledge management between environmental uncertainty and organizational innovation. data was collected through questionnaire from 89 large and medium sized manufacturing companies in suburb ma...

entropy as a measure of uncertainty was used to represent the results of the wavelet technique in electrochemical noise analysis. the experimental signals were obtained by recording the electrochemical potential and current noise of 7075 aluminum alloy in 3.5% nacl solution. the electrochemical potential and current noise were decomposed into 16 levels using daubechies wavelets. wavelet output ...

A b stract The work to be presented here concerns the ordering of alternatives in the Multra Machine Translation System. The Multra MT system is a fundamental part of the Multra prototype, modeling a translation work bench with user-controlled mixed mode of mechanical and human translation. The Multra system is based on transfer and unification. It includes three main modules, responsible for a...

in this paper,the molecular geometry for three tautomers of uracil and four tautomers of cytosine has been analyzed. vibrational ir spectra of the tautomers were   investigated at hf and b3lyp level using the ab initio 6-31g* and lanl2dz basis sets from the program package gaussian 98 (a.7 public domain version). the physico-chemical and biochemical properties of uracil and cytosine are one of...

The Pech Merle spotted horses have been one of the key lines of evidence put forward in support of the notion Upper Palaeolithic cave depictions relate to a concern for the supernatural. Recent findings from genetics has cast doubt on this notion in confirming that such horses actually existed during the Upper Palaeolithic in Europe and therefore it is possible real, rather than fictitious, hor...

The well-known and powerful proof principle by well-founded induction says that for verifying 8x : P(x) for some property P it suuces to show 8x : 8y < x : P(y)] =) P(x)] , provided < is a well-founded partial ordering on the domain of interest. Here we investigate a more general formulation of this proof principle which allows for a kind of parameterized partial orderings < x which naturally a...

Yager [14] discussed the issue of weighted min and max aggregations and provided for a formalization of the process of importance weighted transformation. Generalizing Yager’s principle we suggest the use of fuzzy implication operators for importance weighted transformation.

We describe the current status of the Ca optical frequency standards with laser-cooled neutral atoms realized in two different laboratories for the purpose of developing a possible future optical atomic clock. Frequency measurements performed at the Physikalisch-Technische Bundesanstalt (PTB) and the National Institute of Standards and Technology (NIST) make the frequency of the clock transitio...

The high-order ambiguity function (HAF) was introduced for the estimation of polynomial-phase signals (PPS) embedded in noise. Since the HAF is a nonlinear operator, it suffers from noise-masking effects and from the appearance of undesired crossterms whenmulticomponents PPS are analyzed. In order to improve the performances of the HAF, the multi-lag HAF concept was proposed. Based on this appr...