نتایج جستجو برای: suppression
تعداد نتایج: 106032 فیلتر نتایج به سال:
I discuss quarkonium suppression in equilibrated strongly interacting matter. After a brief review of basic features of quarkonium production I discuss the application of recent lattice data on the heavy quark potential to the problem of quarkonium dissociation as well as the problem of direct lattice determination of quarkonium properties in finite temperature lattice QCD.
Percutaneous nephrolithotomy has revolutionized the ability of the urologist to remove large burdens of renal stones over the last 15 years. In the United States, it has largely replaced open stone surgery for the treatment of large sized stones. One of the key factors in optimizing outcomes for this procedure is accurate percutaneous renal access. The guiding principles for effective renal acc...
Loudness density is the distribution of loudness across dimensions of time and frequency. A computational model of loudness density is described that reproduces equal-loudness level contours from time-domain representations of tones. The model also demonstrates increase in loudness as the bandwidth of a multi-tone complex increases, an observation that is consistent with psychophysical measurem...
This paper presents a method to simultaneously perform 20 dB acoustic echo cancellation and 15-20 dB speech enhancement using an adaptive microphone array combined with spectral subtraction. Primarily intended for handsfree telephones in automobiles, the microphone array system simultaneously emphasizes the near-end talker and suppresses the handsfree loudspeaker and the broadband car noise. Th...
This paper proposes a stereo acoustic echo suppression method for duplex stereo teleconferencing. Firstly the stereo signals are combined in the frequency domain to build a single-channel signal. Secondly, with the single-channel signal model, an optimal Linearly Constrained Minimum Variance (LCMV) filter based on the Widely Linear theory is derived, which is applied on microphone signal direct...
Activation of group I metabotropic glutamate receptors (mGluRs) leads to a concerted modulation of spike afterpotentials in guinea pig hippocampal neurons including a suppression of both medium and slow afterhyperpolarizations (AHPs). Suppression of AHPs may be long-lasting, in that it persists after washout of the agonist. Here, we show that persistent AHP suppression differs from short-term, ...
BACKGROUND Although their eyes are pointing in different directions, people with long-standing strabismic amblyopia typically do not experience double-vision or indeed any visual symptoms arising from their condition. It is generally believed that the phenomenon of suppression plays a major role in dealing with the consequences of amblyopia and strabismus, by preventing images from the weaker/d...
When conflicting images are presented to the corresponding regions of the two eyes, only one image may be consciously perceived. In binocular rivalry (BR), two images alternate in phenomenal visibility; even a salient image is eventually suppressed by an image of low saliency. Recently, N. Tsuchiya and C. Koch (2005) reported a technique called continuous flash suppression (CFS), extending the ...
Cortical visual neurons in the cat and monkey are inhibited by stimuli surrounding their receptive fields (surround suppression) or presented within their receptive fields (cross-orientation or overlay suppression). We show that human contrast sensitivity is similarly affected by two distinct suppression mechanisms. In agreement with the animal studies, human surround suppression is tightly tun...
In this paper, we propose a novel residual echo suppression (RES) algorithm constructed in the acoustic echo canceller. In the proposed approach, we introduce a statistical model to detect the signal components of the output signal and the state of signal is classified into four distinct hypothesis depending on the activity of near-end signal and residual echo. For hypothesis testing, the conve...
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