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Compacted decision tables based attribute reduction
TLDR
This paper first points out that the reducts obtained from a simplified decision table are different from those obtained from its original version, and from a compacted decision table, we cannot obtain the reduCTs in the sense of entropies. Expand
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Noise reduction in image amplification in photorefractive BaTiO3
Abstract Based on the feature that a signal grating has faster formation rate than noise gratings, we have demonstrated that in the presence of a beam with a frequency different from that of the pumpExpand
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Saturation effect in nondegenerate two-wave mixing
Abstract Saturation effects in nondegenerate two-wave mixing are analyzed theoretically for saturable absorbers. A gain saturation effect in the process of energy transfer has been observed. The factExpand
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Fourth-order coherence-function theory of laser-induced molecular reorientational grating and population grating
We have employed fourth-order coherence-function theory to study the influence of the partial-coherence properties of pump beams on the laser-induced gratings. First, we examine the formation ofExpand
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Ultrafast modulation spectroscopy in cascading three-level and four-level systems
We study theoretically ultrafast modulation spectroscopy in Doppler-broadened cascading three-level and four-level systems. The pump beams consist of two frequency components that drive two-pathwayExpand
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Field-correlation effects in Rayleigh-type nondegenerate four-wave mixing: suppression of thermal background
We make an extensive theoretical study of the field-correlation effects on Rayleigh-type nondegenerate four-wave mixing (NFWM), which have been employed for the measurement of ultrafast longitudinalExpand
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Study of Time-Delayed Four-Wave Mixing with Incoherent Light in the absorption band of ruby
Abstract Time-delayed four-wave mixing with incoherent light in the absorption band 4T2 of ruby has been studied experimentally. Dephasing times have been obtained formally by analysing theExpand
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Ultrafast Modulation Spectroscopy in Four-Level System
Based on the interference between two two-photon processes, we reported a four-level ultrafast modulation spectroscopy in Na vapor, where 3S, 3P, 5S, and 4D formed a four-level system. We studied theExpand
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Beam-size effect in time-delayed laser-induced double gratings
We have studied theoretically the effect of the probe-beam size on time-delayed laser-induced double gratings by assuming that the probe beam is described as a Gaussian beam. LettingEs1 andEs2 be theExpand
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