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Changzhi, China

To study the relationship between plasma riboflavin levels and esophageal squamous cell carcinoma. We detected and compared plasma concentrations of riboflavin in patients with esophageal squamous cell carcinoma (ESCC) and immigrants of Linzhou living in Changzhi. Plasma riboflavin levels were quantified in 445 ESCC patients, 689 healthy control subjects and 347 immigrants of Linzhou living in Changzhi by using enzyme-linked immunosorbent assay. The plasma riboflavin levels in patients with ESCC were significantly lower than those in the healthy controls and immigrants of Linzhou living in Changzhi [(731.69 ± 330.67) μg/L vs (1090.43 ± 445.08) μg/L, (731.69 ± 330.67) μg/L vs (897.58 ± 177.78) μg/L, respectively, all P < 0.05], and the plasma riboflavin levels of the healthy controls were higher than those in the immigrants of Linzhou living in Changzhi (P < 0.05). Patients with ESCC have decreased plasma riboflavin levels as compared with the healthy controls and immigrants of Linzhou living in Changzhi, there exists a lack of riboflavin in ESCC patients, but the specific mechanism needs further study. Source

Lian W.,Changzhi University
Electronics Letters

To address feature matching problem where there is only partial overlap between the two feature sets, minimisation of an energy function consisting of feature matching costs and a concave regularisation term capable of handling partial overlaps is proposed. To improve robustness to disturbances, a path following strategy for minimisation which dynamically combines weights of the two terms is adopted. Experimental results verify better performance of the method over several state-of-the-art methods. © The Institution of Engineering and Technology 2015. Source

In this paper, we present the (1+1)-dimensional inhomogeneous nonlinear Schrödinger (NLS) equation that describes the propagation of optical waves in nonlinear optical systems exhibiting optical lattice, inhomogeneous nonlinearity and varying diffraction at the same time. A series of interesting properties of spatial solitons are found from the numerical calculations, such as the stable propagation in the a nonperiodic optical lattice induced by periodic diffraction variations and periodic nonlinearity variations. Finally, the interaction of neighboring spatial solitons in a nonperiodic optical lattice is discussed, and the results reveal that two spatial solitons can propagate periodically and separately in the optical lattice without interaction. © 2010 Elsevier Ltd. All rights reserved. Source

Zhang J.-T.,Beijing Normal University | Ru W.,Changzhi University
Population Ecology

The conservation of the endemic, endangered, and first-class protected tree species, Taxus chinensis var. mairei (Lem. & H. Lev.) W. C. Cheng & L. K. Fu, is urgent in China. To assist the protection of this important medicinal plant species, the biological and ecological characteristics of its populations were investigated and analyzed in Shanxi. The study area, southeastern Shanxi, is a special region suitable for this species growth and development. The floristic composition, life form spectrum, and species diversity of T. chinensis var. mairei forests reflected the features of both warm-temperate and subtropical regions. Size classes in DBH and static life table analysis showed that the population structure of T. chinensis var. mairei was of the increase-type. Plant density, survivorship, and mortality decreased with increase in age. Distribution patterns of individuals were basically clumped and saplings tended to be distributed randomly. Disturbance from collection of leaves, branches, and stems for medicine was an important factor affecting population structure, dynamics, and distribution. The sex ratio of female/male and the efficiency of sexual reproduction were very low. The main way of reproduction for this species is vegetative propagation. Based on these characteristics, some suggestions, such as establishing nature reserves, improving population structure by cultivation and transplantation, developing seed gardens, and plantations, etc., for the conservation management of T. chinensis var. mairei and its forests in Shanxi are discussed. © 2010 The Society of Population Ecology and Springer. Source

In this paper, we present the (1 + 1)-dimensional inhomogeneous nonlinear Schrödinger (NLS) equation, which describes the propagation of light in optical lattice with nonlinear double-well structure. A series of interesting properties of light beam are presented in the optical systems numerically, such as the regular splitting process and stationary localized mode induced by the varying diffraction, the inhomogeneity, and the nonlinear double-well structure.© 2011 Elsevier B.V. All rights reserved. Source

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