Qiongshan, China

Hainan Normal University

Qiongshan, China

Hainan Normal University , is located in Haikou city and is the province's oldest institution for higher learning. Over 20,000 students are enrolled, including about 200 foreigners.The 3,347 sq. metre campus is also home to The Secondary School Teacher’s Continuation Education Centre of Hainan and the Training Centre for Higher Learning Institution are also located on the campus. In 2008, a new campus opened in Guilinyang Town, several kilometres southeast of Haikou. Wikipedia.

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Yan K.,Hainan Normal University
Journal of Computational and Theoretical Nanoscience | Year: 2016

With the development of computer application technology, corpus which based on linguistics and computer science has been attached great importance. In this paper, the author analyzes the construction and application of the corpus system in primary school English classroom, and taking Hainan province as an example. Through the analysis of corpus application in the primary school English classroom, the result shows that corpus can be used to measure the frequency of English vocabulary. So that, by using corpus teachers can analyze the teaching content and adjust the teaching difficulty, at the same time, we can also construct English teaching resources based corpus. As an effective complement to English teaching resources, corpus can widen the acquisition channels of English learning resources, make up the deficiency of traditional learning resources, and drive learners to learn English. Copyright © 2016 American Scientific Publishers All rights reserved.

Liang W.,Hainan Normal University | Moller A.P.,University Paris - Sud
Journal of Avian Biology | Year: 2015

Hosts of brood parasites defend their nests against parasitism by aggression and subsequently, if parasitized, by rejection of the parasite egg or nestling. Cuckoos have evolved plumage mimicry with convergence towards the phenotype of Accipiter hawks that are common predators of cuckoo hosts. Here we tested two alternative hypotheses 1) whether barn swallows Hirundo rustica have evolved less aggressive behavior towards cuckoos in areas of sympatry with more abundant Accipiter hawks; and 2) whether barn swallows have evolved more aggressive anti-parasite behavior in areas with a single species of cuckoo. We presented dummies of common cuckoo Cuculus canorus, sparrowhawk Accipiter nisus and Oriental turtledove Streptopelia orientalis (a benign control) at the nests of barn swallows during breeding, while recording intensity of response and proximity of barn swallows to the dummy. We demonstrated that cuckoos moved away when attacked aggressively and approached more closely by barn swallows showing that barn swallow behavior was efficient at driving away cuckoos. Barn swallows were significantly more aggressive and approached cuckoo and sparrowhawk dummies more closely in Denmark than in China, despite sparrowhawks being relatively more common in Denmark. Responses towards cuckoo dummies differed from responses towards sparrowhawk dummies, showing that barn swallows distinguished between the two different causes of danger. These findings are inconsistent with a less aggressive response towards cuckoo dummies in areas of sympatry with more abundant Accipiter hawks, but consistent with the alternative hypothesis that barn swallows have evolved more aggressive behavior towards cuckoos in areas with a single species of brood parasite, but not in areas with multiple species of parasites, where it is harder for hosts to tell the difference. © 2014 The Authors.

Xu J.,Hainan University | Xu J.,Nanjing University | Yang X.,Hainan University | Lin Q.,Hainan Normal University
Fungal Diversity | Year: 2014

Species within the fungal genus Pestalotiopsis have become a topic of research in many microbial-chemical and pharmacological laboratories because they contain structurally complex, biologically active metabolites. This article is a follow-up to a previous review (Xu, Ebada, and Proksch, Fungal Divers 44:15-31, 2010). It focuses particularly on new findings concerning the chemistry and bioactivity of Pestalotiopsis sp., covering a period ranging from August 2010 to August 2013. Some 160 metabolites were isolated from Pestalotiopsis species during this period and their structures are reported within a biogenetic context. Bioassays showed antitumor, antifungal, and antimicrobial activities to be the most notable bioactivities of secondary metabolites isolated from this genus. The biogenetic pathways associated with the alkaloids, sesquiterpenes, quinines, xanthones, and lactones covered in this review are highlighted. © 2014 Mushroom Research Foundation.

Moller A.P.,University Paris - Sud | Liang W.,Hainan Normal University
Behavioral Ecology | Year: 2013

The life history of tropical birds differs from that of their temperate counterparts by late start of reproduction, small clutch sizes, and high rates of adult survival. Thus, tropical species should have greater residual reproductive value than temperate species. Therefore, tropical birds can be predicted to take smaller risks than closely related temperate birds in order not to jeopardize their prospects of survival, which is the single most important component of fitness, and which is greater in tropical than in temperate species. We estimated flight distances as a measure of risk-taking behavior of common species of birds for populations living in tropical areas in China (mainly Hainan) and in temperate Europe (mainly Denmark and France), predicting that flight distances should be longer in tropical than in temperate populations, and that the difference in flight distance between these 2 environments should be positively correlated with the difference in clutch size. Mean flight distance was more than twice as large in tropical compared with temperate populations for 25 pairs of taxa. The difference in flight distance between tropical and temperate taxa decreased with the difference in clutch size between the 2 environments. These findings are consistent with the hypothesis that tropical birds take smaller risks than closely related temperate taxa to minimize the risk of early death due to predation. © 2012 The Author.

Li N.,Hainan Normal University | Zhao H.,Central China Normal University | Sun J.,University of Missouri
Statistics in Medicine | Year: 2013

The statistical analysis of panel count data has recently attracted a great deal of attention, and a number of approaches have been developed. However, most of these approaches are for situations where the observation and follow-up processes are independent of the underlying recurrent event process unconditional or conditional on covariates. In this paper, we discuss a more general situation where both the observation and the follow-up processes may be related with the recurrent event process of interest. For regression analysis, we present a class of semiparametric transformation models and develop some estimating equations for estimation of regression parameters. Numerical studies under different settings conducted for assessing the proposed methodology suggest that it works well for practical situations, and the approach is applied to a skin cancer study that motivated the study. © 2013 John Wiley & Sons, Ltd..

Cui S.-L.,Beijing University of Technology | Cui S.-L.,Hainan Normal University | Xue Z.,Beijing University of Technology
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2013

In this paper, using matching method in the probe limit, we investigate some properties of a holographic superconductor in Gauss-Bonnet gravity with Born-Infeld electrodynamics. We discuss the effects of the Gauss-Bonnet coupling α and the Born-Infeld parameter b on the critical temperature and condensate. We find that both α and b make the critical temperature decrease, which makes it more difficult for the condensate to form. Moreover we study the magnetic effect on the holographic superconductor and obtain that the ratio between the critical magnetic field and the square of the critical temperature increases from zero as the temperature is lowered below the critical value Tc, which agrees well with previous results. We also find that the critical magnetic field is indeed affected by the Gauss-Bonnet coupling, but not by the Born-Infeld parameter. © 2013 American Physical Society.

Wang J.C.,Hainan Normal University
Dong wu xue yan jiu = Zoological research / "Dong wu xue yan jiu" bian ji wei yuan hui bian ji | Year: 2013

In this study,spectra analysis was conducted to investigate the sexual dichromatism and relationship between body color and quality of the red-eared slider turtle (Trachemys scripta). Visual modeling revealed that the differences of the hues of body colors' ultraviolet (UV) components between male and female were significant. Moreover, the visible(VIS)components of the hues of forelimbs were correlated with body qualities of male but not of female. Our results indicated that UV might act as a signal for sexual cognition in red-eared slider turtles, and female might evaluate male by the VIS components of the hues of forelimbs. These findings provided preliminary results and perspectives to the sexual dichromatism and sexual selection behaviors of red-eared slider turtles.

Yang C.C.,Hainan Normal University
Dong wu xue yan jiu = Zoological research / "Dong wu xue yan jiu" bian ji wei yuan hui bian ji | Year: 2013

Animal coloration has many adaptive functions and plays an important role in signal communication both among intra- and interspecies. For example, it has been widely used in mate choice, intrasexual competition, and as aposematic or cryptic coloration in predator avoidance. Many colors and pigments also function in microbial resistance, structural support, photoprotection, and thermoregulation. Differing from human vision, based on RGB system, many other animals have tetrachromatic vision system, which includes the ultraviolet (UV) range that is undetectable by human eyes. Previous studies showed that ultraviolet is important in some species' social signaling and communication. Moreover, cone inner segments of most classes of vertebrate contain an oil droplet, which acts as a cut-off filter absorbing wavelengths below a critical value, and transmitting longer wavelengths. Animal and human vision is significantly different in that the classification of color by human standards may be a misleading for measuring animal coloration. Here, we illuminate how to use fiber spectrophotometer to quantify animal coloration, and analyze it by spectra analysis and visual modeling. As an example, we obtained plumage reflectance spectra from male and female scarlet minivets (Pericrocotus flammeus). This bird species is sexually dimorphic that the males have plumage color in black and red, while the females have grey and yellow accordingly. These plumage colors are typically generated from melanin and carotenoid pigments, which have an effect on antioxidant activity. Analysis of spectra segments provides hue, chroma, brightness and relative brightness of each wave range. Visual modeling maps color patches on tetrahedral color space and Robinson projection, meanwhile, calculates color span and color space volume which describe the color contrast and color diversity, respectively. In visual modeling, ambient light irradiance and spectral sensitivity of animal retinas are included, which provides an objective evaluation of coloration of animal vision.

Li D.,Hainan Normal University
Journal of Computational and Theoretical Nanoscience | Year: 2013

DNA sequences are composed of four nucleotides, which usually defined over the alphabet {A, G, C, T}. Generally, analysis of DNA sequences should be considered not only the strings' structures but also their chemical structures. In terms of classifications of the four bases, (0, 1)- characteristic sequences of a DNA sequence can be obtained, which can reveal its different functions. Three models are constructed based on the conditional LZ complexity measure which takes chemical properties as its side information to analyze the similarities among different species. This method does not require sequence alignment and is totally automatic. Reasonable results are obtained by three models, which are largely in agreement with previously published results based on the analysis of identical data sets. Copyright © 2013 American Scientific Publishers.

Wang S.-Q.,Hainan Normal University
Pakistan Journal of Botany | Year: 2013

Chromosomal meiotic behavior in pollen mother cells (PMCs) of Paeonia emodi, an endangered species, was investigated in natural population represented by nine individuals. The results showed that: (1) Mean chromosome configuration was 2n = 10 = 0.20 I + 4.90 II at metaphase. Most of the chromosomes were ring bivalents, but some were rod bivalents or univalents. The existence of rod bivalent and univalent indicated the differentiation between the homologous chromosomes, most probably due to chromosomal structural heterozygosity. (2) All individuals studied were chromosomal structural heterozygotes, i.e., inversion, as indicated by bridge and/or fragment. (3) There were some variations among individuals in size of fragments, which indicated that different inversions existed in this species, i.e., paracentric inversion polymorphisms. Chromosomal structural heterozygosity is a common phenomenon in Paeonia. Further research is necessary to probe into the reasons that structural heterozygosity exists widely, and whether there is relationship between heterozygosity and ecological adaptation in this species.

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