To improve the achievable rate for the MIMO channels, we propose a hybrid transmission (HT) scheme that mixes half-duplex decode-and-forward cooperative relaying transmission (DFRH)with direct transmission (DT). In the HT scheme, the source message is divided into two parts: one is transmitted by DFRH scheme and another is transmitted by DT scheme. Precoding and decoding are considered to conve...

A horizontal-vertical partition scheme modification for fractal and hybrid image compression and an algorithm of its optimization are proposed. The proposed partition scheme efficiency analysis for two test images is carried out. The advantages of the proposed partition scheme in comparison to conventional horizontal vertical partition scheme and to Quadtree partition scheme are shown.

This paper introduces a new computer-aided classification system for detection of prostate cancer in Transrectal Ultrasound images (TRUS). To increase the efficiency of the computer aided classification process, an intensity adjustment process is applied first, based on the Pulse Coupled Neural Network (PCNN) with a median filter. This is followed by applying a PCNN-based segmentation algorithm...

This paper describes an efficient lifting based hybrid image coding (LB-HIC) scheme. The proposed scheme is based on using the lifting transform (LT) in conjunction with the discrete cosine transform (DCT) to provide coding performance superior to the popular image coders. The proposed method uses combination of the DCT coding and the high performance of the set partitioning in hierarchical tre...

Systems as asymmetric multiprocessor platforms are considered power-efficient multiprocessor architectures, efficient task partitioning (assignment) and play a crucial role in achieving more energy efficiency at these multiprocessor platforms. This paper addresses the problem of energy-aware static partitioning of periodic real time tasks on heterogeneous multiprocessor platforms. A hybrid appr...

We introduce a simulation scheme for Brownian semistationary processes, which is based on discretizing the stochastic integral representation of the process in the time domain. We assume that the kernel function of the process is regularly varying at zero. The novel feature of the scheme is to approximate the kernel function by a power function near zero and by a step function elsewhere. The re...

Kinetic simulation of plasmas in which equilibrium occurs over ion timescales poses a computational challenge due to the disparate timescales of the electron plasma frequency ( 10), the ion plasma frequency ( 10), ion transit frequency ( 10), and the ionization frequency ( 10). To investigate long time scale, low frequency phenomenon a hybrid electrostatic PIC algorithm is presented in which th...

We study the problem of estimating the number of triangles in a graph stream. No streaming algorithm can get sublinear space on all graphs, so methods in this area bound the space in terms of parameters of the input graph such as the maximum number of triangles sharing a single edge. We give a sampling algorithm that is additionally parameterized by the maximum number of triangles sharing a sin...