Digital breast tomosynthesis (DBT) images of a novel anthropomorphic breast phantom (UPenn phantom) acquired on two breast tomosynthesis systems were analyzed in terms of their power spectra (PS). The β and κ power law coefficients were estimated from 2D planar, tomosynthesis projection images and reconstructed planes. These data were compared to the PS characteristics as retrieved from a group...

{ The leaky LMS adaptive lter can be implemented either directly or by adding random white noise to the input signal of the LMS adaptive lter. In this paper, we analyze and compare the mean-square performances of these two adaptive lter implementations for system identiication tasks with zero mean i.i.d. input signals. Our results indicate that the performance of the direct implementation is su...

This paper presents computer simulation of the influence of the operator's body on the performance of a portable radio in mobile environments. Due to the human body blocking and absorption effects, the antenna pattern is significantly changed and a strong cross-polarized field is induced. An approach called modified Doppler power spectrum (MDPS) method is proposed to study the influence by an o...

The diagnosis of gearbox faults based on the Fourier analysis of the vibration signal produced from a gear reductor system has proved its limitations in terms of spectral resolution. In this paper, we propose a method for the fault diagnosis of a gear reductor made of two toothed wheels operating at constant conditions. This technique is based on Prony method. The good performances of the propo...

Heterogeneous networks (HetNets) are likely to provide a ubiquitous access to the mobile broadband services as they involve various small cells, each targeting a different environment in the network. However, the application of the advanced resource allocation techniques is highly needed in order to handle the inter-cell interference and fully exploit the benefits of such networks. In this stud...

We outline a general framework to use coordinated multi-point (CoMP) transmission technology in downlink multicell non-orthogonal multiple access (NOMA) systems considering distributed power allocation at each cell. In this framework, CoMP transmission is used for users experiencing strong receivesignals from multiple cells while each cell adopts NOMA for resource allocation to its active users...

A hyperspectral image can be considered as an image cube where the third dimension is the spectral domain represented by hundreds of spectral wavelengths. As a result, a hyperspectral image pixel is actually a column vector with dimension equal to the number of spectral bands and contains valuable spectral information that can be used to account for pixel variability, similarity, and discrimina...

The possibility of assembling through welding is one of the major features of thermoplastic composites and it positively contributes to their cost-effectiveness in manufacturing. This paper presents a comparative evaluation of ultrasonic, induction and resistance welding of individual CF/PPS thermoplastic composite samples that comprises an analysis of the static and dynamic mechanical behaviou...

There are many modulation methods suitable for optical wireless communication. OOK, PPM are adopted widely in optical wireless communication for its high average-power-efficiency. DPPM, DPIM and DH-PIM are three new modulation methods for optical wireless communication, which may be the substitutes of PPM because of their better performance in power efficiency and bandwidth efficiency. In this ...

Fourier analyzer concept that generalize the waveform communications to include chaotic carriers can be used to discuss and optimize detection problems. Using this new description it is possible to develop new detector configurations with improved performance for chaotic communications that may be used in ultra-wideband radio (UWB). Radio communications via channels already occupied by traditio...