Abstract– In this paper, vibration suppression and control of a smart flexible satellite maneuvering in a circular orbit are studied. The satellite is considered as a rigid hub and two flexible appendages with PZT (lead zirconate titanate) layers attached on them as sensors and actuators. Flexible satellite governing equations of motion are obtained using Lagrange-RayleighRitz technique and ass...

ABSTRACT Common motion compensated hybrid video coding standards such as H.263, MPEG-1, MPEG-2, MPEG-4 are based on a fractional-pel displacement vector resolution of 1/2-pel. Recent approaches like MPEG-4 ACE and H.26L (TML5) use a 1/4-pel displacement vector resolution. In order to estimate and compensate fractional-pel displacements, the image signal has to be interpolated. Therefore differe...

A hybrid 3D compression scheme which combines fractal coding with neighbourhood vector quantisation for video and volume data is reported. While fractal coding exploits the redundancy present in different scales, neighbourhood vector quantisation, as a generalisation of translational motion compensation, is a useful method for removing both intraand interframe coherences. The hybrid coder outpe...

 A drift reduction method which consists of Wiener filtering and overlapped block motion compensation is evaluated for the base layer performance in a multiresolution hybrid coding scheme. At constant bit rates average gains in PSNR of 1.9–2.4 dB have been achieved for critical test signals compared to MPEG–2 compatible coding. This corresponds to a bit rate reduction of 33%. The drift reducti...

Bio-hybrid devices, which integrate biological cells with synthetic components, have opened a new path in miniaturized systems with the potential to provide actuation and control for systems down to a few microns in size. Here, we address the challenge of remotely controlling bio-hybrid microswimmers propelled by multiple bacterial cells. These devices have been proposed as a viable method for ...

This paper evaluates performances of an adaptive noise cancelling (ANC) based target detection algorithm on a set of real test data supported by the Defense Evaluation Research Agency (DERA UK) for multi-target wideband active sonar echolocation system. The hybrid algorithm proposed is a combination of an adaptive ANC neuro-fuzzy scheme in the first instance and followed by an iterative optimum...

This paper presents robot programming by demonstration using hybrid dynamic system modelling. A hybrid dynamic system has been identified as a good way to model tasks involving contacts and constrained motion. We propose a framework where mappings required within the hybrid dynamic system model are extracted from a demonstration. In this paper we concentrate on extracting a mapping for the Even...

Switching Diffusion processes can be represented as pathwise unique solutions of SDE’s in a hybrid state space that are driven by Brownian motion and Poisson random measure. This paper extends these SDE’s to switching jumpdiffusions, the jumps of which i) happen simultaneously with mode switching, and ii) depend on the mode after the switching. Jumps satisfying both i) and ii) are referred to a...

This paper presents a new hybrid bronchoscope tracking method that uses an electromagnetic position sensor, a sequential Monte Carlo sampler, and its evaluation on a dynamic motion phantom. Since airway deformation resulting from patient movement, respiratory motion, and coughing can significantly affect the rigid registration between electromagnetic tracking and computed tomography (CT) coordi...

A rate-distortion framework is used to de ne a very low bit rate coding scheme based on quadtree segmentation and optimized selection of motion estimators. This technique achieves maximum reconstructed image quality under the constraint of a target bitrate for the coding of the vector eld and segmentation information . First, a complete scheme is proposed for hybrid 2D and 3D motion estimation ...