排序方式: 共有22条查询结果,搜索用时 15 毫秒
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Release of masking for speech through interaural time delay 总被引:1,自引:0,他引:1
R Carhart T W Tillman K R Johnson 《The Journal of the Acoustical Society of America》1967,42(1):124-138
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An extended energy cascade theory is presented, which correctly predicts the Reynolds number dependence of centerline turbulence intensities in the self-preserving region of fully turbulent free shear flows, shown clearly by the experimental measurements. The model indicates that below Re = 106 too few stages exist to completely erase the cascade's “memory” of initial conditions. 相似文献
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A generator of chemical structures (CONGEN) has been utilized to investigate two aspects of the structural isomerism of mono- and sesquiterpenoid skeletons: (1) the scope of possible isomers under various structural constraints; and (2) the scope of possible isomers based on a mechanistic model which allows interactive exploration of reactions of formation and interconversion. The possibilities, even under severe constraints, are many more than the structural types commonly encountered in natural. These results indicate the potential danger of structural assignment based in part on biogenic grounds. 相似文献
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Adaptive phase-distortion correction based on parallel gradient-descent optimization 总被引:13,自引:0,他引:13
We describe an adaptive wave-front control technique based on a parallel stochastic perturbation method that can be applied to a general class of adaptive-optical system. The efficiency of this approach is analyzed numerically and experimentally by use of a white-light adaptive-imaging system with an extended source. To create and compensate for static phase distortions, we use 127-element liquid-crystal phase modulators. Results demonstrate that adaptive wave-front correction by a parallel-perturbation technique can significantly improve image quality. 相似文献
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We introduce a synthetic-imaging technique that can be applied to correct anisoplanatic images degraded by atmospheric turbulence. This method is based on local image-quality analysis applied to a large set of short-exposure images and can be considered a generalization of the frame-selection technique. Experimental results obtained for atmospheric data demonstrate the efficiency of the synthetic-imaging technique in improving image quality. 相似文献
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Perceptual masking in multiple sound backgrounds 总被引:3,自引:0,他引:3
R Carhart T W Tillman E S Greetis 《The Journal of the Acoustical Society of America》1969,45(3):694-703
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