the ministry of health, treatment and medical education of iran has recently announced an estimated figure of 200,000 injecting drug users (idus). the aim of this study was to pilot a national program using demographics, types of drug abuse and prevalence of blood-borne infections among idus.in order to elicit data on demographics, types of drug abuse and prevalence of blood-borne infections am...

This article presents a new subspace-based technique for reducing the noise of signals in time-series. In the proposed approach, the signal is initially represented as a data matrix. Then using Singular Value Decomposition (SVD), noisy data matrix is divided into signal subspace and noise subspace. In this subspace division, each derivative of the singular values with respect to rank order is u...

in this paper we introduce a simple, computationally inxepentsive, adaptive recursive structure for enhancing bandpass signals highly corrupted by broad-band noise. this adaptive algorithm, enhancing input signals, enables us to estimate the center frequency and the bandwidth of the input signal. in addition, an important feature of the proposed structure is that the conventional bias existing ...