The strong fluctuation theory is applied to the study of the atmospheric snowfall which is modeled as a layer of random discretescatterers edium. As functions of size distribution, fractional volume, ...and radius of scatterers, we illustrate the relationship between the reflectivity factor and precipitation rate, the attenuation of the centimeter and millimeter waves, and the line-of-sight transmission of coherent and incoherent wave components. The theoretical results are shown to match favorably with experimental data.
A new steganographic method resisting statistical attack Xiangwei Kong; Chang Liu; Xingang You ...
Proceedings 7th International Conference on Signal Processing, 2004. Proceedings. ICSP '04. 2004,
2004, Letnik:
2
Conference Proceeding
In this paper we present a new steganographic method for JPEG images that can resist both chi-square attack and Fridrich's "Breaking the F5" statistical attack. A key element in our method is a ...compensatory strategy that keeps the first-order statistical property of DCT coefficients in the stego-image almost identical with that in the cover-image, thus the statistical attacks are defeated. Unlike the correcting transform adopted in OutGuess that modifies steganographically usable coefficients to correct the statistical deviations caused by the embedding process leading to a relatively small steganographic capacity, the compensatory scheme in our method uses steganographically unusable coefficients (coefficients with absolute value equal to zero) to compensate the distortion of the first-order statistical property of the stego-image induced by the embedding process. Therefore both the steganographic capacity and the quality of the stego-image remain high. Experimental results based on a large set of test images demonstrate the performance of our method in the aspects of both security and capacity issue.
A Genetic Heterogeneity of Renpenning Syndrome Mapped to Chromosome Xq21-Xqter Cui, Bin (Chinese Academy of Sciences and Shanghai Second Medical University, Shanghai, China); Sun, Yuming (Xinxiang County People Hospital, Xinxiang, China); Sun, Yuqin (Xinxiang City Central Hospital, Xinxiang, China) ...
Korean Journal of Genetics,
(Mar 2004), Letnik:
26, Številka:
1
Journal Article
Renpenning syndrome is an X-linked mental retardation associated with short stature, moderate microcephaly, unremarkable facies, and no other neurological abnormality. Renpenning first reported this ...disorder in a Mennonite family, and using this family, Renpenning Syndrome(RENS) has been mapped to Xp11.2-p11.4. Xu Cs found a Chinese family with an X-linked hereditary disease, and the clinical phenotype is similar to RENS.
