Teaching evaluation is an indispensable part of the teaching system of junior high school.In order to inherit the excellent traditional Chinese culture and arts,traditional Chinese painting has been paid more and more...Teaching evaluation is an indispensable part of the teaching system of junior high school.In order to inherit the excellent traditional Chinese culture and arts,traditional Chinese painting has been paid more and more attention to in the fine arts curriculum of rural junior high school.This paper takes the classroom teaching evaluation of traditional Chinese painting as a form of fine arts in rural junior high school as the research object,and analyzes the problems existing in the classroom teaching evaluation of traditional Chinese painting in rural junior high school.This paper puts forward the corresponding improvement measures from the aspects of comprehensive evaluation object,concrete evaluation content,flexible evaluation language and diversified evaluation subjects,in order to improve the evaluation level of fine arts teachers'classroom teaching,improve students'aesthetic cognition and learning interest in traditional Chinese painting,and cultivate students'innovative thinking and spirit.展开更多
Gaseous reduction kinetics of the high phosphorus iron ore fines from Hubei in China and effect of microwave pretreatment on the gaseous reduction behavior were studied. Gaseous reduction kinetics were investigated by...Gaseous reduction kinetics of the high phosphorus iron ore fines from Hubei in China and effect of microwave pretreatment on the gaseous reduction behavior were studied. Gaseous reduction kinetics were investigated by TG （Thermogravimetric） methods using LINSEIS STA PT 1600 thermal analysis equipment. Microwave pretreatments to the ore fines with four power levels were performed using a high temperature microwave reactor. Its effect was examined by TG methods and its mechanism was analyzed by SEM （scanning electron microscope） and EDS （energy dispersive spectrometer）. Gaseous reduction tests were carried out using a tubular furnace. Results of kinetic study indicate that controlling step of the gaseous reduction of the ore fines is a mixing control of gas internal diffusion and interface chemical reaction when reduction fraction is less than 0.8 and is solid state diffusion when reduction fraction is more than 0.8. Microwave pretreatment of the ore fines could change the pore structure of the oolitic unit to generate cracks, fissures and loose zones, which promotes reduction in the early stage and delays the occurrence of sintering. Gaseous reduction tests show in the condition that the ore fines are pretreated with a microwave power of 450 W for 4 min and reduced under temperature of 1 273 K, the gaseous reduction of the ore fines could be apparently intensified. Using CO or H2 as a reductant and ore fines being reduced for 1.5 to 2 h , increase of metallization rate of the ore fines is 10% to 13%.展开更多
基金Research Project on Degree and Postgraduate Education and Teaching Reform of Jiangxi Normal University(YJG201804).
文摘Teaching evaluation is an indispensable part of the teaching system of junior high school.In order to inherit the excellent traditional Chinese culture and arts,traditional Chinese painting has been paid more and more attention to in the fine arts curriculum of rural junior high school.This paper takes the classroom teaching evaluation of traditional Chinese painting as a form of fine arts in rural junior high school as the research object,and analyzes the problems existing in the classroom teaching evaluation of traditional Chinese painting in rural junior high school.This paper puts forward the corresponding improvement measures from the aspects of comprehensive evaluation object,concrete evaluation content,flexible evaluation language and diversified evaluation subjects,in order to improve the evaluation level of fine arts teachers'classroom teaching,improve students'aesthetic cognition and learning interest in traditional Chinese painting,and cultivate students'innovative thinking and spirit.
基金Sponsored by National Natural Science Foundation of China(51144010)
文摘Gaseous reduction kinetics of the high phosphorus iron ore fines from Hubei in China and effect of microwave pretreatment on the gaseous reduction behavior were studied. Gaseous reduction kinetics were investigated by TG （Thermogravimetric） methods using LINSEIS STA PT 1600 thermal analysis equipment. Microwave pretreatments to the ore fines with four power levels were performed using a high temperature microwave reactor. Its effect was examined by TG methods and its mechanism was analyzed by SEM （scanning electron microscope） and EDS （energy dispersive spectrometer）. Gaseous reduction tests were carried out using a tubular furnace. Results of kinetic study indicate that controlling step of the gaseous reduction of the ore fines is a mixing control of gas internal diffusion and interface chemical reaction when reduction fraction is less than 0.8 and is solid state diffusion when reduction fraction is more than 0.8. Microwave pretreatment of the ore fines could change the pore structure of the oolitic unit to generate cracks, fissures and loose zones, which promotes reduction in the early stage and delays the occurrence of sintering. Gaseous reduction tests show in the condition that the ore fines are pretreated with a microwave power of 450 W for 4 min and reduced under temperature of 1 273 K, the gaseous reduction of the ore fines could be apparently intensified. Using CO or H2 as a reductant and ore fines being reduced for 1.5 to 2 h , increase of metallization rate of the ore fines is 10% to 13%.
