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12 results on '"SUN Yi-zhen"'

3. Analysis of Influencing Factors of Rural Living Environment Pollution in Shandong Province Based on ISM Model

Author

SUN Yi-zhen and ZHENG Jun

Subjects
lcsh:GE1-350, ISM model, Shandong Province, influence factors, lcsh:Agriculture (General), lcsh:S1-972, lcsh:Environmental sciences, rural domestic pollution
Abstract

The influencing factors of rural living environment pollution are complex and diverse. Through the field research, 11 specific factors that affect rural domestic pollution in Shandong Province were identified from four aspects, namely, domestic sewage, living garbage, living energy and rural toilets. On this basis, the ISM model was used to analyze the influencing factors and the hierarchical relationship between rural domestic pollution in Shandong Province. The results showed that the 11 influencing factors were interrelated and formed a hierarchical structure of 5 levels, in which health knowledge and environmental awareness were the direct influence factors of the surface. Household education level, family economic level, the village's emphasis on environmental protection, non-agricultural employment experience, government investment and infrastructure investment were the middle of indirect factors; Age, urbanization and population density were the underlying factors.

Published
2017

12. Numerical simulation research on pullout strength of grouted bolt foundation in jointed rock masses for transmission lines.

Author

SUN Yi-zhen, YANG Yue-feng, ZHENG Wei-feng, and LIANG Zheng-zhao

Subjects
SIMULATION methods & models, ELECTRIC lines, ROCK density, ELASTICITY, GROUT (Mortar)
Abstract

The influence of rock mass and grouted material on the pullout strength of grouted bolt foundation in jointed rock masses is analyzed by the orthogonal numerical simulation. The numerical models focus on the following five factors: elasticity modulus of rock, elasticity modulus of mortar, trace lengths and joint inclination angle in rock mass, embedding depth of the bolt in the rock mass on four different levels of every factor. The experimental results reveal that the embedding depth of the bolt in the rock mass is the most important and sensitive factor influencing the pullout strength of grouted bolt foundation, and the factors next are elasticity modulus of mortar, elasticity modulus of rock, trace lengths and joint inclination angle in rock mass. The elasticity modulus and strength of mortar are more significant than those of rock mass in improvement of the pullout strength of the grouted bolt foundation, but the extent of the improvement is limited. [ABSTRACT FROM AUTHOR]

Published
2011

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