نتایج جستجو برای: coherence
تعداد نتایج: 71691 فیلتر نتایج به سال:
INTRODUCTION AND OBJECTIVES The clinical benefits of optical coherence tomography-guided percutaneous coronary intervention are unclear. Therefore, in this study we sought to evaluate the impact of optical coherence tomography guidance on stent strut coverage following drug-eluting stent implantation. METHODS A total of 101 patients in 105 lesions were randomly assigned to receive percutaneou...
Coherence is a fundamental tool in the analysis of neuronal data and for studying multiscale interactions of single and multiunit spikes with local field potentials. However, when the coherence is used to estimate rhythmic synchrony between spiking and any other time series, the magnitude of the coherence is dependent upon the spike rate. This property is not a statistical bias, but a feature o...
PURPOSE This study was undertaken to test the hypothesis that patients with epilepsy have abnormal imaginary coherence compared with control subjects. METHODS Thirty patients with seizures underwent magnetoencephalography (MEG) recording using a whole cortex MEG system. Conventional equivalent current dipoles (ECDs) and synthetic aperture magnetometry (SAM) were used to analyze MEG data. Neur...
COMMOS1 is an operating system architecture developed to support shared persistent data objects in distributed systems. This paper describes its support for flexible coherence. The approach is based on a microkernel, typed memory objects and integrated coherence control. The coherence server is clearly separated from the external pager. This separation makes it easier to provide multiple cohere...
Spike train coherence is used to characterize common inputs that drive motor unit synchronization. However, data segmentation, overlap, and taper can affect coherence magnitude, thereby influencing the incidence at which significant coherence is detected. Also, the effect of spike train firing rate and common input variability on the detection of significant coherence is unknown. We used a pool...
as the form and appearance of a literature work inevitably affect thestructure and shape ofthatwork, theyplay animportant role in its permanence.in this study, factors and elementsaffecting the cohesion, coherence, form and structure of allegories and debates in parvin'scollection were analyzed using a systematic method. the results of the study can becategorizedin four groups. first, in p...
Text processing requires inferences for establishing coherence between successive sentences. In neuropsychological studies and brain imaging studies, these coherence-building processes have been ascribed to the right hemisphere. On the other hand, there is evidence for prefrontal brain damage causing non-aphasic language disorders, in which text level processes are impaired. In this study, we u...
the entanglement between a ?-type three-level atom and its spontaneous emission fields is investigated. the effect of spontaneously generated coherence (sgc) on entanglement between the atom and its spontaneous emission fields is then discussed. we find that in the presence of sgc the entanglement between the atom and its spontaneous emission fields is completely phase dependent, while in absen...
This paper reviews the brightness and coherence properties of radiation from storage rings and free electron lasers (FELs). Starting from the statistical optics and using mutual coherence function of the radiation field, we define the transverse and temporal coherence and modes. Spectral brightness can be represented in radiation phase-space via the Wigner function which is the Fourier transfor...
The paper presents a new form of polarimetric interferometric information visualization: polarimetric coherence signatures. These signatures combine the idea of conventional polarization signatures and the concept of interferometric coherence. The polarimetric coherence signature plot shows the magnitude of the interferometric coherence as a function of the polarization ellipse parameters (elli...
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