Results 231 to 240 of about 2,235,965 (245)

Ultrasound echo evaluation by K-distribution

1993 Proceedings IEEE Ultrasonics Symposium, 1993
The ultrasonic echo backscattered from tissues is modeled using non-Rayleigh statistics, namely the K distribution. Through simulation using a one dimensional discrete scattering model, the properties of statistics governing the echo envelope are investigated.
Molthen, Robert C., Narayanan, V. Manjo, Shankar, P. M., Reid, J. M., Genis, V., Vergara, L.   +5 more
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Na and K distribution in agpaitic pegmatites☆

Lithos, 2007
Abstract Composition and zoning of amphibole in agpaitic pegmatites of the 1.16 Ga Ilimaussaq complex, South Greenland record the chemical evolution of the final stages of an already extremely fractionated melt. Our results show that the general differentiation trends found in the earlier rocks of the complex are continued in the pegmatites, albeit ...
Daniel Müller-Lorch, Michael A.W. Marks, Gregor Markl   +2 more
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Some extensions of the K distribution

2013
In this chapter we have seen how the relatively simple theoretical ideas underlying the K distribution model of sea clutter that were discussed in Chapters 6 and 7 can be extended, both in terms of their physical content and of the mathematical techniques used in their analysis.
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Comparison of parameter estimators for K-distribution

IEE Proceedings - Radar, Sonar and Navigation, 1994
Parameter estimation forms an essential part of many signal- and image-processing tasks. In particular, in the analysis of coherent imagery, such as that provided by synthetic aperture radar (SAR), parameter estimation is required to characterise the statistical properties of homogeneous regions for use in segmentation and target detection algorithms ...
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CFAR detection in K-distributed clutter

ICSP '98. 1998 Fourth International Conference on Signal Processing (Cat. No.98TH8344), 2002
CFAR detection in K-distributed clutter is addressed. First, we discuss the compound K-distribution model, correlated K-distribution model and the simulation of K-distributed clutter, and then summarize the methods of CFAR detection in K-distributed clutter.
null Guan Jian, null He You, null Peng Ying-Ning   +2 more
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Estimating the correlation properties of k-distributed SAR clutter

IEE Proceedings - Radar, Sonar and Navigation, 1995
The authors extend previous analysis of the texture properties of k-distributed SAR clutter by including spatial correlation properties. Throughout they compare operating in the intensity domain with using its logarithm or square root (amplitude).
LOMBARDO, Pierfrancesco, OLIVER C. J.
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Lidoflazine and Na and K distribution in normo- and hypokalaemic rats

European Journal of Pharmacology, 1975
The effects of lidoplazine on K-metabolism were investigated in two types of experiments. (1) K and Na concentrations were measured in plasma, heart, diaphragm and erythrocytes in normo- and hypokalaemic rats with or without chronic (1 month) lidoplazine treatment.
E, Carmeliet, R, Xhonneux, R S, Reneman
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Correlated K-distributed Clutter Models

Optica Acta: International Journal of Optics, 1985
In this paper we examine the way in which a correlated K-distributed clutter model may be applied in the study of coherent-imaging systems. The theoretical background behind the model is discussed and various different correlated gamma-distributed surface models are analysed.
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Roth 401(k) Distribution Confusion

Compensation & Benefits Review, 2007
Now that Roth 401(k) contributions are permanent, many employers may revise their plans, resulting in an increase in Roth contributions and distributions.
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Special functions associated with the K distribution

2013
In this chapter, we discuss the special functions associated with the K distribution. These functions are gamma function, K distribution PDF, Bessel function, Laguerre polynomial and Hermite polynomial.
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