In the process of dynamic mining of network sensitive data flow, the mining efficiency is reduced due to the restriction of mining rules, and a dynamic mining method of network sensitive data flow based on improved fuzzy clustering is proposed. The automatic sending and receiving behavior is taken as the classification criterion, and the network data flow is classified to obtain the network sensitive data flow. The dynamic mining rules of network sensitive data flow are formulated to limit the feature extraction process, and the feature parameters of sensitive data flow are obtained. According to the characteristic parameters of the sensitive data flow, the data flow is clustered, and the hidden information patterns among the data are mined by using the improved fuzzy clustering algorithm to realize the dynamic mining of the network sensitive data flow. The analysis of the experimental results shows that the proposed method has high mining efficiency and good application effect in dynamic mining of network sensitive data streams.
With Ipomoea batatas（L.） Lam as the main raw material and sensory score as the index, hazelnut, whey protein isolate, konjac powder and xylitol were added to obtain the optimal formula of meal substitute powder through single factor test and orthogonal test. The optimal formula was as follows: Ipomoea batatas（L.） Lam 45 g, hazelnut 4.5 g, whey protein isolate 18 g, konjac powder 2 g, and xylitol 1.5g. The meal substitute powder under this formula has Ipomoea batatas（L.） Lam aroma and milk flavor,smooth taste, uniform color and good palatability. The energy of meal substitute powder was 1056.81KJ, in which the energy provided by protein accounted for 25.59 % of the total energy, and the energy provided by fat accounted for 6.96 % of the total energy, which met the requirements of T/CNSS 0022019. Moreover, all the detection indexes of microbial detection of meal substitute powder were in line with the health standards.
Dry bran medium was used to simulate drought conditions in the laboratory. The virulence of25 Metarhizium brunneum strains from different altitudes（170～3100 m） of Gaoligong Mountain were tested with Tenebrio molitoras the hosts. The strains of M. brunneum with stronger drought resistance and insecticidal virulence were screened to lay a foundation for effectively using entomogenous fungi to control agroforestry pests. The results showed that the drought resistance and insecticide virulence of M. brunneum strains at different altitudes in Gaoligong Mountain were different（the corrected fatality rates being 12.5%～64.5%,the initial lethal time being 4 d～13 d）, but the influence of the altitude gradient on the virulence of M. brunneum strains was not significant（P＞0.05）. M. brunneum strains with higher virulence included BUM-170, BUM-600, BUM-1700, BUM-1800, BUM-2200, BUM-2300,BUM-2500（the corrected fatality rates ＞50%）, among which the strain BUM-2200 possessed the highest virulence（the corrected fatality rates being 64.50%） and had great biocontrol application potential in arid areas.
Conidia of 29 strains of Beauveria bassiana from different altitude areas of the Gaoligong Mountain（170 m～3100 m） were treated with the same intensity of UV radiation and diluted on PPDA plate medium. Conidial survival rate and UV fatality rate of each strain were calculated according to conidial number before and after treatment. The relationship between UV tolerance of B. bassiana and the habitat elevation was analyzed, and the excellent strains with strong UV tolerance were screened. The results showed that conidial survival rate of all strains was inhibited after UV treatment, and the influence on various strains were obviously different. There was a low positive correlation between conidial survival rate and habitat elevation, and there were significant differences in UV tolerance among the strains at low, middle and high altitudes. The UV tolerance of the strains at high altitudes was relatively strong. Four strains were screened with better UV tolerance（strain BUB-1500 from medium altitude and strain BUB-2200, BUB-2500, BUB-3100 from high altitude）, among which strain BUB-2200 had the best tolerance（conidial survival rate of 83.3%）.
In order to reduce VOC, free formaldehyde, heavy metals and other harmful substances contained in ordinary interior wall coatings, styrene acrylic lotion with low free formaldehyde content is used as the binder to prepare interior wall latex paint that meets the requirements by modifying nanoTiO 2 , pigments, fillers and additives. In the preparation process of latex paint, single factor analysis and response surface analysis were used to optimize the dosage of lotion, the ratio of styrene acrylic lotion and modified nano-TiO 2 and the number of coating layers, and seek the best process formula. The results show that the emulsion has a great influence on the quality of the coating film, and the modified nano-TiO 2 mainly affects the environmental protection performance of the coating. The optimal process formula of interior wall latex paint is that the amount of emulsion is 19.5%, the ratio of styrene-acrylic emulsion to modified nano-TiO 2 is 100∶3.90, and the number of coating layers is 2. The mechanical properties and environmental protection properties of latex paint are in line with national standards.
