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Huzhou, China

Mei Z.,Huzhou University | Korotkova O.,University of Miami
Optics Letters | Year: 2015

We establish a sufficient condition under which the alternation series of cross-spectral densities (CSD) constitutes a valid CSD. Using such a condition, we introduce a novel class of multi-sinc Schell-model sources with circular and Cartesian symmetries. It is demonstrated that far fields produced by the new sources carry interesting characteristics, being adjustable multi-rings and lattice patterns. © 2015 Optical Society of America.

Korotkova O.,University of Miami | Mei Z.,Huzhou University
Optics Letters | Year: 2015

The electromagnetic Schell-model beams whose cross-spectral matrices have elements belonging to different families of functions are considered for the first time. The spatial distributions of polarization properties of such beams are shown to be made completely or partially different from that of the average intensity. © 2015 Optical Society of America.

Korotkova O.,University of Miami | Mei Z.,Huzhou University
Optics Letters | Year: 2015

The conditions under which convolution of two degrees of coherence represents a novel legitimate degree of coherence are established for wide-sense statistically stationary Schellmodel beam-like optical fields. Several examples are given to illustrate how convolution can be used for generation of a far field being a modulated version of another one. Practically, the convolutions of the degrees of coherence can be achieved by programming the liquid crystal spatial light modulators. © 2015 Optical Society of America.

Mei Z.,Huzhou University | Mao Y.,Zhejiang University of Technology
Optics Express | Year: 2014

A class of electromagnetic sources with sinc Schell-model correlations is introduced. The conditions on source parameters guaranteeing that the source generates a physical beam are derived. The evolution behaviors of statistical properties for the electromagnetic stochastic beams generated by this new source on propagating in free space and in atmosphere turbulence are investigated with the help of the weighted superposition method and by numerical simulations. It is demonstrated that the intensity distributions of such beams exhibit unique features on propagating in free space and produce a double-layer flat-top profile of being shape-invariant in the far field. This feature makes this new beam particularly suitable for some special laser processing applications. The influences of the atmosphere turbulence with a non-Kolmogorov power spectrum on statistical properties of the new beams are analyzed in detail. ©2014 Optical Society of America.

Meng Y.,Zhejiang University | Shao C.,Huzhou University | Chen M.,Zhejiang University
Briefings in Bioinformatics | Year: 2011

Current achievements in plant microRNA (miRNA) research area are inspiring. Molecular cloning and functional elucidation have greatly advanced our understanding of this small RNA species. As one of the ultimate goals, many research efforts devoted to draw a comprehensive view of miRNA-mediated gene regulatory networks in plants. Numerous bioinformatics tools competent for network analysis have been available. However, the most important point for network construction is to obtain reliable analytical results based on sufficient experimental data. Here, we introduced a general workflow to retrieve and analyze the desired data sets that serve as the cornerstones for network construction. For the upstream analyses of miRNA genes, the sequence feature of miRNA promoters should be characterized. And, regulatory relationships between transcription factors (TFs) and miRNA genes need to be investigated. For the downstream part, we emphasized that the high-throughput degradome sequencing data were especially useful for genuine miRNA- target pair identification. Functional characterization of the miRNA targets is essential to provide deep biological insights into certain miRNA-mediated pathways. FormiRNAs themselves, studies on their organ- or tissue-specific expression patterns and the mechanism of self-regulation were discussed. Besides, exhaustive literature mining is required to further support or improve the established networks. It is desired that the introduced framework for miRNA-mediated network construction is timely and useful and could inspire more research efforts in the miRNA research area. © The Author 2011. Published by Oxford University Press.

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