Time-stretch microscopy based on time-wavelength sequence reconstruction from wideband incoherent source

Time-stretch microscopy based on time-wavelength sequence reconstruction from wideband incoherent source

Time-dependent source reconstruction from EEG-data

Among the different approaches to the bioelectromagnetic inverse problem, the currentdensity reconstruction methods (CDR) provide the most general solutions. Since the inverse problem does not have a unique solution, model assumptions have to be taken into account. Multi-channel measurements contain not only spatial, but also temporal information about the sources, so a naturally extension to e...

On Stolt stretch time migration

We implement Stolt-stretch time migration with an analytical formulation for the optimal stretch parameter and show how it improves the quality of imaging. By a cascaded f-k migration approach with this algorithm, we manage to obtain time migration results on real data comparable to Gazdag’s phase-shift method, with a high accuracy for steeply deeping events at a computational cost dramatically...

Reconstruction of Continuous-time Chaotic Trajectory from Symbolic Sequence

z y x − − = & ay x y + = & x b z ( − + = & (1) z c) Abstract – It is shown that symbolic sequence can be used to reconstruct a trajectory of a chaotic system with high precision. Examples of construction of symbolic sequence and trajectory reconstruction are given. A method that demonstrates exponential increase in precision with the length of processing is developed. Microtriode generator is d...

A Wideband digital Beamforming Method Based on Stretch Processing

The calculation of wideband digital beamforming using traditonal methods is so large that it is hard to realize in project. This paper describes a wideband digital beamforming method on the base of stretch processing for linear frequency modulated (LFM) waveforms. This method offers advantages that are moderate data rate for wideband signal processing by reducing the signal bandwidth greatly. I...