نتایج جستجو برای: signal saturation correction filter
تعداد نتایج: 720932 فیلتر نتایج به سال:
The aim of this paper is to introduce procedural steps for extension of the 1Dhomodyne phase correction for k-space truncation in all gradient encodingdirections. Compared to the existing method applied to 2D partial k-space,signal losses introduced by the phase correction filter is observed to beminimal for the extended approach. In addition, the modified form of phasecorre...
DS-CDMA can achieve good bit error rate (BER) performance in a severe frequency-selective fading channel by using frequency-domain equalization (FDE) based on MMSE criterion instead of rake combining. FDE requires accurate channel estimation (CE). Recently, a decision feedback (DF)MMSE-CE using a fixed DF filter coefficient has been proposed. The DF filter coefficient is an important design par...
The vortex of low speed flows is difficult to measure resulted in that the output signal of vortex flowmeter appears the spectral line splitting and frequency offset in the low SNR and causes the frequency resolution to be decreased. In the paper, it first conducted the multi-scale wavelet decomposition to the vortex signal with noise, then removed the noise spectrum and carried on power spectr...
The paper presents a novel Modulated Power Filter and Compensator (MPFC) scheme for voltage stability, energy conservation, loss reduction, power factor correction, and power quality enhancement for electric distribution systems based on Multi-Objective Particle Swarm Optimisation (MOPSO). The MPFC scheme was developed by the first author to vary the shunt power filter equivalent admittance, mo...
Introduction: Chemical Exchange Saturation Transfer (CEST) is a versatile contrast enhancement mechanism for MR imaging [1,2]. The CEST effect depends on the molecular group that provides the exchanging proton(s). One application of the CEST contrast is cartilage vitality imaging, where the CEST contrast is generated by protons of glykosaminoglykans (gagCEST [3]). However, CEST imaging has not ...
Inverse Z-spectrum analysis for clean NOE and amide CEST-MRI – application to human glioma Moritz Zaiss, Johannes Windschuh, Jan-Eric Meissner, Daniel Paech, Alexander Radbruch, and Peter Bachert Dept. Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, Dept. of Neuroradiology, University of Heidelberg, Heidelberg, Germany, Section Neuro–oncologic Imaging, G...
* Corresponding author ** This study is supported by the ‘Ministère Luxembourgeois de la Culture, de l’Enseignement Supérieur et de la Recherche’ and the French Space Agency (CNES) Abstract –Owing to the non-linearity of the rainfallinfiltration-runoff relationship, soil water content in the river basin represents a key parameter to be monitored for flood management purposes. Remote sensing obs...
The common conviction about FIR (finite impulse response) digital filters is that the number of necessary taps, to reach the same performance as provided by IIR (infinite impulse response) digital filters, is usually too large. Moreover, the standard FIR filter design algorithm (Remez exchange) allows the design of linear-phase filters only. Therefore, IIR filters are often preferred over FIR o...
Introduction: Functional MRI methods have been used to study sensorimotor processing in the Spinal cord. However, these techniques confront unwanted contributions to the measured signal from the physiological fluctuations. For the spinal cord imaging, most of the challenges are consequences of cardiac and respiratory movement artifacts that are considered as significant sources of noise, especi...
A topological multiple testing scheme for one-dimensional domains is proposed where, rather than testing every spatial or temporal location for the presence of a signal, tests are performed only at the local maxima of the smoothed observed sequence. Assuming unimodal true peaks with finite support and Gaussian stationary ergodic noise, it is shown that the algorithm with Bonferroni or Benjamini...
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