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Articles by Jian Xiao
Total Records ( 2 ) for Jian Xiao
  Weiping Deng , Jianzhong Zhou , Qiang Zou , Jian Xiao , Yongchuan Zhang and Weihua Hua
  Support vector machine is adopted in this paper to construct flood disaster evaluation model, which can be indicated as a comprehensively nonlinear classification issue. In this article, kernel function of SVM is optimized by kernel transformation and kernel parameters optimization. In order to discriminate the flood disaster evaluation indexes and really reflect their classification contributions, kernel function is weighted to promote classification performance and reduce the error influence by weak features. Further more, after analyzing the over learning issue of traditional grid search, an improved grid search is proposed to optimize the kernel parameters. The new search method illustrates it is more reasonable to make second search around some suboptimal solutions. By this search method, the final solution obtains high accuracy in testing samples and reduces the value of penalty factor. The experiment results show the promotion of classification precision by the dual optimization model and identify it could be a good choice for other classification issues.
  Jian Xiao , Jideng Ma , Long Jin , Xuewei Li , Mingzhou Li and An-An Jiang
  The liver is a vital organ that plays a major role in metabolism and other functions in the body. In this study, researchers used microarray analyses to investigate the gene expression profile during the development of the liver in pigs (Suss crofa). Researchers identified various differentially expressed genes in the liver between the prenatal and postnatal stages. The upregulated genes in the prenatal liver were related to the cell cycle and developmental process. The genes that were upregulated in the postnatal liver were active in the immunological process. The study presented gene expression profiles of the porcine liver during the pre and post-natal stages which contribute to the understanding porcine liver development.
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