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Mechanical properties of tissues in terms of elasticity and viscosity provide us useful information which may be used in detecting tumors. These parameters can be estimated from the measurement of particle velocities of shear wave propagation which is generated by a vibrating needle at a certain frequency. For the heterogeneous medium, the finite difference time domain (FDTD) is an effective method...
This paper introduces a new PARAFAC algorithm for a class of third-order tensors. Particularly, the proposed algorithm is based on subspace estimation and solving a non-symmetrical joint diagonalization problem. To deal with large scale problem, a procedure for overcoming scale and permutation ambiguities is proposed in a parallel computing scheme leading to a significant cost reduction of our method...
In this paper, we consider the cross-layer design of a cooperative medium access control (MAC) protocol for wireless ad hoc networks. In particular, we propose a cooperative MAC protocol which can work either in the cooperative transmission mode for unidirectional traffic or physical-layer network coding (PNC) mode for bidirectional traffic. By designing a suitable control frame exchange the proposed...
Magnetic Resonance (MR) imaging is useful for medical diagnosis. However, MR images are often corrupted by Rician noise, leading to undesirable visual quality. Based on the fact that many images can be acquired at nearly the same location, this paper proposes a novel learning method for the reduction of Rician noise using nonlinear ridge regression with a training set established from a set of given...
This paper concerns the deterministic and structured designs of the measurement matrix in compressed sensing (CS). The deterministic design is approached using chaotic sequences while the structured one is with a spread-spectrum technique using chirp modulation. We propose to combine these two approaches to take advantage of the simple hardware implementation of chaotic sequences, and of reduced the...
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