Abstrac t This paper presents a procedure for wind speed measurement using ultrasonic transducers based on short-time Fourier transform (STFT). The measurement of wind speed was performed by estimating the ultrasonic transit-time (ToF). For this purpose the estimated ToF was used the technique of digital signal processing, based on the STFT. The ultrasonic signal detection was performed by sett...

Introduction: One of the major problems in the development of nuclear medicine images is the presence of noise. The noise level in nuclear medicine images is usually reduced by the analysis of imaging data in a Fourier transform environment. The main drawback of this environment belongs to low signal to noise ratio in high frequencies because removing noise frequencies may remove data and times...

myocardial perfusion spect imaging with tc99m-sestamibi is the most accurate non-invasive means of detecting coronary artery disease and assessing the severity of perfusion abnormalities in the patients with coronary stenosis. though simple and straight forward the results produced by the technique is very much affected by the details being used. one of the main problems with the test, which ha...

The camera mapping can be seen in two ways. The classic approach is to emphasize the projective nature of the camera. But also the re-projective nature can be taken into account: Every point in the image plane determines a viewing ray. Both mappings can be described by the same set of parameters. In fact the re-projective camera mapping can be seen as the inversion of the projective camera mapp...

Using the wideband indoor channel measurements data at 2.4, 4.75 and 11.5 GHz of [1], a statistical Ultra Wide Band (UWB) channel model is determined. Employing different windows (i.e. Rectangular, Hanning and Blackman-Harris), the impulse response model for the UWB channel is obtained and accordingly, major channel parameters such as path loss exponent, shadowing, root mean square (rms) delay ...

Effects of the windowing process, widely investigated by the scientific literature for narrow–band components embedded in white noise, is not sufficiently detailed when signals are corrupted by colored noise. Such a phenomenon can heavily affect the spectral parameters estimation of the noisy signal. In this paper effects of the windowing on the output of analog–to–digital converters with ∆Σ to...

In order to enhance automatic speech recognition performance in adverse conditions, localized spectro-temporal features (LSTF) are investigated, which are motivated by physiological measurements in the primary auditory cortex. In the Aurora2 experimental setup, Gabor-shaped LSTFs combined with a Tandem system yield robust performance with a feature set size of 30. If computational constraints a...