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Limei Zhang,Lingjun Meng,Chuanwei Guo,Meixiang Gao,Dong Liu,Xueping Zhang 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.12
Maoer Mountain National Forest Ecological Station is located in Heilongjiang Province. By using the statistical spatial analysis method, which showed that the soil mites community and species richness of mites spatial heterogeneity. Also, which is illustrated that the spatial effect relationship with the environmental factors. The results of crossvariogram and simple Mantel test showed that positive relationships between soil mite communities, specific mite species and environmental factors were detected. Among the environmental factors, soil pH showed significant affects on spatial heterogeneity of soil mite species in both years. When considering the relationships between soil mite species, positive correlations and specific mite species were also observed. Spatial heterogeneities of soil mite communities and most of the soil mite species were regulated by structured factors, in which environmental variables might be important drivers. Thus, it is implied that abundances of soil mite community and most of the soil mite species showed aggregated spatially heterogeneity, and significant relationship between such heterogeneity and environmental factors were detected.
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Loss of strain energy in metal belt for continuously variable transmission (CVT) pulley
Wu Zhang,Wei Guo,Chuanwei Zhang,Farong Kou 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.7
Pulley SENE (Strain energy) losses affect the transmission efficiency of metal belt continuously variable transmissions. The presentresearch focuses on analysis of the SENE power loss. Mechanical and deformation models of the pulley have been developed. The pulleystress, strain and SENE analyses were performed using finite element method software. The results indicate that with an increase in thetransmission ratio, the SENE of the driving pulley decreases, while that of the driven pulley increases, and the SENE-induced total powerloss increases after initially decreasing; the minimum and maximum pulley SENE total power losses are 43.92 and 240.69 W respectively. The pulley working radius was also found to have a major impact on the stress, strain and SENE. Our conclusion that the SENEpower loss is at a minimum when the transmission ratio is 1 is consistent with the real behavior of these pulleys.
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