Language anxiety is one of the most common elements that influence language learning.Based on a questionnaire investigation,university students'trait anxiety and environmental anxiety in English classes will be an...Language anxiety is one of the most common elements that influence language learning.Based on a questionnaire investigation,university students'trait anxiety and environmental anxiety in English classes will be analyzed and discussed.The two types of anxiety are positively correlated with each other and negatively correlated with the students'oral English ability.Results of this analysis will help promote the teachers'understanding of the classroom environment and create a favorable teaching circumstance.展开更多
In order to investigate the effect of sintering temperature on aging properties and mechanical properties of 3Y-TZP dental ceramic in simulated oral environment, 3Y-TZP nanopowder compacts were pressurelessly sintered...In order to investigate the effect of sintering temperature on aging properties and mechanical properties of 3Y-TZP dental ceramic in simulated oral environment, 3Y-TZP nanopowder compacts were pressurelessly sintered at 1 350℃, 1 400 ℃, 1 450 ℃,1 500 ℃, respectively, then were treated by soaking in artificial saliva （65 ℃, pH=7） for two months. The treated specimens sintered at 1 350 ℃ showed there was no phase transformation but whose strength and toughnesswere significantly improved （P〈0.05）, while those sintered at 1 400 ℃- 1 500 ℃ revealed a small amount of phase transformation and insignificant mechanical reinforcement （P〉0.05）. No microcracks were detected but increment in lattice volume was found in all specimens. Lowering sintering temperature favors aging resistance and mechanical reinforcement of 3Y-TZP in a simulated oral environment.展开更多
文摘Language anxiety is one of the most common elements that influence language learning.Based on a questionnaire investigation,university students'trait anxiety and environmental anxiety in English classes will be analyzed and discussed.The two types of anxiety are positively correlated with each other and negatively correlated with the students'oral English ability.Results of this analysis will help promote the teachers'understanding of the classroom environment and create a favorable teaching circumstance.
基金Funded by the National High Technology Research and Development Program of China (No.2006AA03Z440)
文摘In order to investigate the effect of sintering temperature on aging properties and mechanical properties of 3Y-TZP dental ceramic in simulated oral environment, 3Y-TZP nanopowder compacts were pressurelessly sintered at 1 350℃, 1 400 ℃, 1 450 ℃,1 500 ℃, respectively, then were treated by soaking in artificial saliva （65 ℃, pH=7） for two months. The treated specimens sintered at 1 350 ℃ showed there was no phase transformation but whose strength and toughnesswere significantly improved （P〈0.05）, while those sintered at 1 400 ℃- 1 500 ℃ revealed a small amount of phase transformation and insignificant mechanical reinforcement （P〉0.05）. No microcracks were detected but increment in lattice volume was found in all specimens. Lowering sintering temperature favors aging resistance and mechanical reinforcement of 3Y-TZP in a simulated oral environment.
