background : suicide is a global public health problem. deliberate self-poisoning (dsp) is one of the most common methods of suicide in many countries. this study was designed to identify the trends and characteristics of dsp in gorgan. methods: the study was carried out retrospectively in 5 azar hospital. it included 549 patients who were hospitalized in the hospital due to dsp from march 2008...

The last two decades have seen tremendous effort on the development of high-level synthesis algorithms for efficient realization of the multiplication of a variable by a set of constants using only addition, subtraction, and shift operations. These algorithms generally target the minimization of the number of adders and subtractors, assuming that shifts are realized using only wires due to the ...

The Fast Fourier Transform (FFT) is widely used in various digital signal processing applications. The performance requirements for FFT in modern real-time applications has increased dramatically due to the high demand on capacity and performance of modern telecommunication systems, where FFT plays a major role. Software implementations of FFT running on a general purpose computer can no longer...

In this paper a parallel implementation of the SVD{updating algorithm using approximate rotations is presented. In its original form the SVD{updating algorithm had numerical problems if no reorthogonalization steps were applied. Representing the orthogonal matrix V (right singular vectors) using its parameterization in terms of the rotation angles of n(n?1)=2 plane rotations these reorthogonali...

This paper presents a new efficient parallel adder (PA) based design for the one-dimensional (1-D) anylength discrete Fourier transform (DFT). Using the Chirp-Z transform, the author develops an algorithm which can formulate the 1-D any-length DFT as cyclic convolutions. This algorithm exhibits higher flexibility in the transform length as compared with the existing approaches to prime length D...

A fast and accurate quantization noise estimator aiming at fixed-point implementations of Digital Signal Processing (DSP) algorithms is presented. The estimator enables significant reduction in the computation time required to perform complex wordlength optimizations. The proposed estimator is based on the use of Affine Arithmetic (AA) and it is presented in two versions: (i) a general version ...

Digital signal processing (DSP) applications are nowadays widely used and their complexity is ever growing. The design of dedicated hardware accelerators is thus still needed in system-on-chip and embedded systems. Realistic hardware implementation requires first to convert the floating-point data of the initial specification into arbitrary length data (finite-precision) while keeping an accept...

The second order allpass section is the fundamental design unit for filters. In Figures 1 and 2 of [1], it was shown how to realise it with two-port adaptors. Such a realisation, to a certain view, minimises the use of computational resources, having one multiplier per filter order. For VLSI, complexity will in general depend on the number and wordlength of the arithmetic operations involved in...