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ABSTRACTA kind of fusion algorithm of infrared and visible images based on frame difference detection technology and area feature was proposed to increase the fusion quality of the infrared image and reduce complexity. Firstly, frame difference method was designed to complete detection on objectives in infrared images so as to conduct objective clustering and image segmentation; information among frames is used to complete accurate locating of objective; then different fusion rules were designed to complement effective information of visible light and infrared images as possible and complete image fusion according to features of objective area. The complexity of fusion algorithm in this thesis was analyzed theoretically. Meanwhile, fusion experiment was executed on two conditions of unmovable and observable objective in image of visible light and infrared light and movable and observable objective in image of visible light and infrared light; experiment result indicates that proposed technology has higher fusion quality and the fusion image can accurately reflect objective and background compared with current image fusion technology.

Lactiplantibacillus plantarumis an important probiotic bacterium and extensively applied to functional food. Its survival is strongly affected by the heat-shock process during manufacture. Acclimation is thought to be able to enhance bacteria resistance to heat stress. In this study, the results of transcriptomics and bioinformatics analysis showed that alcohol dehydrogenase adhE-like, phosphoribose-ATP pyrophosphatase hisE, flavodoxin ykuN, and dihydropterin aldolase folB might be related with heat resistance of L. plantarumCGMCC8198. Furthermore, after these genes were expressed in Escherichia coli, survival rate, hydrophobicity and membrane integrity of the recombinant bacteria under high temperature were also significantly improved. Besides, by screening the strains after multiple rounds of acclimation, a strain (XH) with better heat tolerance was obtained, and the results of qRT-PCR showed that these four genes, especially hisE, were upregulated in the acclimated strain when it was treated with high temperature. These findings indicated that adhE-likeand some other potential genes could improve the heat resistance of lactic acid bacteria, and might be used as indicators for screening of heat-tolerant probiotics strains.

The joint optimization problem of product schedule and preventive maintenace in the flow shop is NP hard. In this paper, a joint optimization model was firstly established by abstracting the tobacco production process into a equivalent two-machine flow shop. And then a simplified method was proposed to solve the model according to the characteristic of the problem. Finally, a case was used to verify the validity of the model and the effectiveness of the method.