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As a non-invasive technique applied for the functional mapping of human brain, Magnetoencephalography (MEG) can acquire the neural activity with high temporal resolution and moderate spatial resolution. However, when reading a MEG record, for research or clinical reference, the investigator face the signals from non-cerebral sources like eye movements, heart beat and muscle activity always appear...
Digital radiographs play very important role in medical imaging. However, the image quality has weakness with lower contrast and some noises owing to various reasons. So it is necessary to enhance these images to facilitate the postprocessing or diagnosis. In this paper, our method utilized wavelet transform to decompose the image, removed the noise using wavelet threshold method, and modified the...
In this paper, a novel blind source separation method based on the array-averaged Fractional Fourier Transform is proposed. This method can decrease the noise levels, and suppress the interactions of the source signals, which lead to better separation performance. Compared with the previous blind source separation techniques based on the time-frequency distributions, this proposed method produces...
Silicon nanowires (SiNWs) fabricated by MEMS technology and its DC response to antigen (HBsAg) was demonstrated in this paper. Anisotropic self-stop etching was employed to ensure low cost batch production. Electrical characterization revealed that, field effect of such device, with SiNWs' width and thickness in the order of 10 nm, guaranteed linear resistance modulation in a wide range, which made...
Severe noise and interference on the upstream channel in the HFC system and noise funneling effects are very hard. These noise and interference abstract as narrow band interference and take a nonlinear suppression measure from the point of signal processing. High efficient nonlinear suppression arithmetic MLMS/MRLS/MFTF can be applied in the narrow band interference suppression. The SNR improvement...
This paper aims to analyze the dynamic characteristics of the postural sway measurements, the curves of the velocity and acceleration of the postural sway measurements were used. The curves of smoothed velocity and acceleration were got through the filter of Haar wavelet packet decomposing function. At the increasing of age, the velocity and acceleration of the postural sway measurements are increasing,...
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